-# $Cambridge: exim/src/Makefile,v 1.5 2008/02/14 13:49:35 fanf2 Exp $
+# $Cambridge: exim/src/Makefile,v 1.5.2.1 2009/02/24 13:13:46 tom Exp $
# Top-level makefile for Exim; handles creating a build directory with
# appropriate links, and then creating and running the main makefile in that
cd build-$(buildname); \
$(RM_COMMAND) -f *.o lookups/*.o lookups/*.a auths/*.o auths/*.a \
routers/*.o routers/*.a transports/*.o transports/*.a \
- pcre/*.o pcre/*.a
+ pdkim/*.o pdkim/*.a
clean_exim:; cd build-$(buildname); \
$(RM_COMMAND) -f *.o lookups/*.o lookups/*.a auths/*.o auths/*.a \
-# $Cambridge: exim/src/OS/Makefile-Base,v 1.16 2009/01/20 16:06:14 fanf2 Exp $
+# $Cambridge: exim/src/OS/Makefile-Base,v 1.16.2.1 2009/02/24 13:13:46 tom Exp $
# This file is the basis of the main makefile for Exim and friends. The
# makefile at the top level arranges to build the main makefile by calling
# therefore always be run, even if the files exist. This shouldn't in fact be a
# problem, but it does no harm. Other make programs will just ignore this.
-.PHONY: all allexim buildauths buildlookups buildrouters \
+.PHONY: all allexim buildauths buildlookups buildpdkim buildrouters \
buildtransports checklocalmake clean
exim_checkaccess \
exim_dbmbuild exim_dumpdb exim_fixdb exim_tidydb exim_lock \
buildlookups buildrouters buildtransports \
- buildauths exim
+ buildauths buildpdkim exim
# Targets for special-purpose configuration header builders
OBJ_WITH_CONTENT_SCAN = malware.o mime.o regex.o spam.o spool_mbox.o
OBJ_WITH_OLD_DEMIME = demime.o
-OBJ_EXPERIMENTAL = bmi_spam.o spf.o srs.o dk.o dkim-exim.o dcc.o
+OBJ_EXPERIMENTAL = bmi_spam.o spf.o srs.o dk.o dcc.o
# Targets for final binaries; the main one has a build number which is
# updated each time. We don't bother with that for the auxiliaries.
local_scan.o $(EXIM_PERL) $(OBJ_WITH_CONTENT_SCAN) \
$(OBJ_WITH_OLD_DEMIME) $(OBJ_EXPERIMENTAL)
-exim: lookups/lookups.a auths/auths.a \
+exim: lookups/lookups.a auths/auths.a pdkim/pdkim.a \
routers/routers.a transports/transports.a \
$(OBJ_EXIM) version.c
@echo " "
@echo "$(LNCC) -o exim"
$(FE)$(PURIFY) $(LNCC) -o exim $(LFLAGS) $(OBJ_EXIM) version.o \
routers/routers.a transports/transports.a lookups/lookups.a \
- auths/auths.a \
+ auths/auths.a pdkim/pdkim.a \
$(LIBRESOLV) $(LIBS) $(LIBS_EXIM) $(IPV6_LIBS) $(EXTRALIBS) \
$(EXTRALIBS_EXIM) $(DBMLIB) $(LOOKUP_LIBS) $(AUTH_LIBS) \
$(PERL_LIBS) $(TLS_LIBS) $(PCRE_LIBS) $(LDFLAGS)
spf.o: $(HDRS) spf.h spf.c
srs.o: $(HDRS) srs.h srs.c
dk.o: $(HDRS) dk.h dk.c
-dkim-exim.o: $(HDRS) dkim-exim.h dkim-exim.c
dcc.o: $(HDRS) dcc.h dcc.c
# The module containing tables of available lookups, routers, auths, and
INCLUDE="$(INCLUDE) $(IPV6_INCLUDE) $(TLS_INCLUDE)"; \
echo " "
+# The PDKIM library
+
+buildpdkim pdkim/pdkim.a: config.h
+ @cd pdkim; $(MAKE) SHELL=$(SHELL) AR="$(AR)" $(MFLAGS) CC="$(CC)" CFLAGS="$(CFLAGS)" \
+ FE="$(FE)" RANLIB="$(RANLIB)" RM_COMMAND="$(RM_COMMAND)" HDRS="$(PHDRS)" \
+ INCLUDE="$(INCLUDE) $(IPV6_INCLUDE) $(TLS_INCLUDE)"; \
+ echo " "
+
# The "clean", "install", and "makefile" targets just pass themselves back to
# the main Exim makefile. These targets will be obeyed only if "make" is obeyed
# for them in the build directory.
#!/bin/sh
-# $Cambridge: exim/src/scripts/MakeLinks,v 1.14 2008/01/17 13:03:35 tom Exp $
+# $Cambridge: exim/src/scripts/MakeLinks,v 1.14.2.1 2009/02/24 13:13:47 tom Exp $
# Script to build links for all the exim source files from the system-
# specific build directory. It should be run from within that directory.
ln -s ../../src/auths/spa.h spa.h
cd ..
+# Likewise for the code for the PDKIM library
+mkdir pdkim
+cd pdkim
+ln -s ../../src/pdkim/README README
+ln -s ../../src/pdkim/Makefile Makefile
+ln -s ../../src/pdkim/base64.c base64.c
+ln -s ../../src/pdkim/base64.h base64.h
+ln -s ../../src/pdkim/bignum.c bignum.c
+ln -s ../../src/pdkim/bignum.h bignum.h
+ln -s ../../src/pdkim/bn_mul.h bn_mul.h
+ln -s ../../src/pdkim/pdkim.c pdkim.c
+ln -s ../../src/pdkim/pdkim.h pdkim.h
+ln -s ../../src/pdkim/rsa.c rsa.c
+ln -s ../../src/pdkim/rsa.h rsa.h
+ln -s ../../src/pdkim/sha1.c sha1.c
+ln -s ../../src/pdkim/sha1.h sha1.h
+ln -s ../../src/pdkim/sha2.c sha2.c
+ln -s ../../src/pdkim/sha2.h sha2.h
+cd ..
+
# The basic source files for Exim and utilities. NB local_scan.h gets linked,
# but local_scan.c does not, because its location is taken from the build-time
# configuration. Likewise for the os.c file, which gets build dynamically.
--- /dev/null
+# $Cambridge: exim/src/src/pdkim/Makefile,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $
+
+OBJ = base64.o bignum.o pdkim.o rsa.o sha1.o sha2.o
+
+pdkim.a: $(OBJ)
+ @$(RM_COMMAND) -f pdkim.a
+ @echo "$(AR) pdkim.a"
+ $(FE)$(AR) pdkim.a $(OBJ)
+ $(RANLIB) $@
+
+.SUFFIXES: .o .c
+.c.o:; @echo "$(CC) $*.c"
+ $(FE)$(CC) -c $(CFLAGS) $(INCLUDE) $*.c
+
+base64.o: $(HDRS) base64.c
+bignum.o: $(HDRS) base64.c
+pdkim.o: $(HDRS) base64.c
+rsa.o: $(HDRS) base64.c
+sha1.o: $(HDRS) base64.c
+sha2.o: $(HDRS) base64.c
+
+# End
--- /dev/null
+# $Cambridge: exim/src/src/pdkim/README,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $
+
+Preliminary REAME. Please ignore FTTB.
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/base64.c,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/*
+ * RFC 1521 base64 encoding/decoding
+ *
+ * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
+ *
+ * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "base64.h"
+
+static const unsigned char base64_enc_map[64] =
+{
+ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
+ 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
+ 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
+ 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
+ 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
+ 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7',
+ '8', '9', '+', '/'
+};
+
+static const unsigned char base64_dec_map[128] =
+{
+ 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
+ 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
+ 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
+ 127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
+ 127, 127, 127, 62, 127, 127, 127, 63, 52, 53,
+ 54, 55, 56, 57, 58, 59, 60, 61, 127, 127,
+ 127, 64, 127, 127, 127, 0, 1, 2, 3, 4,
+ 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
+ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
+ 25, 127, 127, 127, 127, 127, 127, 26, 27, 28,
+ 29, 30, 31, 32, 33, 34, 35, 36, 37, 38,
+ 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
+ 49, 50, 51, 127, 127, 127, 127, 127
+};
+
+/*
+ * Encode a buffer into base64 format
+ */
+int base64_encode( unsigned char *dst, int *dlen,
+ unsigned char *src, int slen )
+{
+ int i, n;
+ int C1, C2, C3;
+ unsigned char *p;
+
+ if( slen == 0 )
+ return( 0 );
+
+ n = (slen << 3) / 6;
+
+ switch( (slen << 3) - (n * 6) )
+ {
+ case 2: n += 3; break;
+ case 4: n += 2; break;
+ default: break;
+ }
+
+ if( *dlen < n + 1 )
+ {
+ *dlen = n + 1;
+ return( POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL );
+ }
+
+ n = (slen / 3) * 3;
+
+ for( i = 0, p = dst; i < n; i += 3 )
+ {
+ C1 = *src++;
+ C2 = *src++;
+ C3 = *src++;
+
+ *p++ = base64_enc_map[(C1 >> 2) & 0x3F];
+ *p++ = base64_enc_map[(((C1 & 3) << 4) + (C2 >> 4)) & 0x3F];
+ *p++ = base64_enc_map[(((C2 & 15) << 2) + (C3 >> 6)) & 0x3F];
+ *p++ = base64_enc_map[C3 & 0x3F];
+ }
+
+ if( i < slen )
+ {
+ C1 = *src++;
+ C2 = ((i + 1) < slen) ? *src++ : 0;
+
+ *p++ = base64_enc_map[(C1 >> 2) & 0x3F];
+ *p++ = base64_enc_map[(((C1 & 3) << 4) + (C2 >> 4)) & 0x3F];
+
+ if( (i + 1) < slen )
+ *p++ = base64_enc_map[((C2 & 15) << 2) & 0x3F];
+ else *p++ = '=';
+
+ *p++ = '=';
+ }
+
+ *dlen = p - dst;
+ *p = 0;
+
+ return( 0 );
+}
+
+/*
+ * Decode a base64-formatted buffer
+ */
+int base64_decode( unsigned char *dst, int *dlen,
+ unsigned char *src, int slen )
+{
+ int i, j, n;
+ unsigned long x;
+ unsigned char *p;
+
+ for( i = j = n = 0; i < slen; i++ )
+ {
+ if( ( slen - i ) >= 2 &&
+ src[i] == '\r' && src[i + 1] == '\n' )
+ continue;
+
+ if( src[i] == '\n' )
+ continue;
+
+ if( src[i] == '=' && ++j > 2 )
+ return( POLARSSL_ERR_BASE64_INVALID_CHARACTER );
+
+ if( src[i] > 127 || base64_dec_map[src[i]] == 127 )
+ return( POLARSSL_ERR_BASE64_INVALID_CHARACTER );
+
+ if( base64_dec_map[src[i]] < 64 && j != 0 )
+ return( POLARSSL_ERR_BASE64_INVALID_CHARACTER );
+
+ n++;
+ }
+
+ if( n == 0 )
+ return( 0 );
+
+ n = ((n * 6) + 7) >> 3;
+
+ if( *dlen < n )
+ {
+ *dlen = n;
+ return( POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL );
+ }
+
+ for( j = 3, n = x = 0, p = dst; i > 0; i--, src++ )
+ {
+ if( *src == '\r' || *src == '\n' )
+ continue;
+
+ j -= ( base64_dec_map[*src] == 64 );
+ x = (x << 6) | ( base64_dec_map[*src] & 0x3F );
+
+ if( ++n == 4 )
+ {
+ n = 0;
+ if( j > 0 ) *p++ = (unsigned char)( x >> 16 );
+ if( j > 1 ) *p++ = (unsigned char)( x >> 8 );
+ if( j > 2 ) *p++ = (unsigned char)( x );
+ }
+ }
+
+ *dlen = p - dst;
+
+ return( 0 );
+}
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/base64.h,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/**
+ * \file base64.h
+ *
+ * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
+ *
+ * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef POLARSSL_BASE64_H
+#define POLARSSL_BASE64_H
+
+#define POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL -0x0010
+#define POLARSSL_ERR_BASE64_INVALID_CHARACTER -0x0012
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Encode a buffer into base64 format
+ *
+ * \param dst destination buffer
+ * \param dlen size of the buffer
+ * \param src source buffer
+ * \param slen amount of data to be encoded
+ *
+ * \return 0 if successful, or POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL.
+ * *dlen is always updated to reflect the amount
+ * of data that has (or would have) been written.
+ *
+ * \note Call this function with *dlen = 0 to obtain the
+ * required buffer size in *dlen
+ */
+int base64_encode( unsigned char *dst, int *dlen,
+ unsigned char *src, int slen );
+
+/**
+ * \brief Decode a base64-formatted buffer
+ *
+ * \param dst destination buffer
+ * \param dlen size of the buffer
+ * \param src source buffer
+ * \param slen amount of data to be decoded
+ *
+ * \return 0 if successful, POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL, or
+ * POLARSSL_ERR_BASE64_INVALID_DATA if the input data is not
+ * correct. *dlen is always updated to reflect the amount
+ * of data that has (or would have) been written.
+ *
+ * \note Call this function with *dlen = 0 to obtain the
+ * required buffer size in *dlen
+ */
+int base64_decode( unsigned char *dst, int *dlen,
+ unsigned char *src, int slen );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* base64.h */
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/bignum.c,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/*
+ * Multi-precision integer library
+ *
+ * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
+ *
+ * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+/*
+ * This MPI implementation is based on:
+ *
+ * http://www.cacr.math.uwaterloo.ca/hac/about/chap14.pdf
+ * http://www.stillhq.com/extracted/gnupg-api/mpi/
+ * http://math.libtomcrypt.com/files/tommath.pdf
+ */
+
+#include "bignum.h"
+#include "bn_mul.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+#define ciL ((int) sizeof(t_int)) /* chars in limb */
+#define biL (ciL << 3) /* bits in limb */
+#define biH (ciL << 2) /* half limb size */
+
+/*
+ * Convert between bits/chars and number of limbs
+ */
+#define BITS_TO_LIMBS(i) (((i) + biL - 1) / biL)
+#define CHARS_TO_LIMBS(i) (((i) + ciL - 1) / ciL)
+
+/*
+ * Initialize one or more mpi
+ */
+void mpi_init( mpi *X, ... )
+{
+ va_list args;
+
+ va_start( args, X );
+
+ while( X != NULL )
+ {
+ X->s = 1;
+ X->n = 0;
+ X->p = NULL;
+
+ X = va_arg( args, mpi* );
+ }
+
+ va_end( args );
+}
+
+/*
+ * Unallocate one or more mpi
+ */
+void mpi_free( mpi *X, ... )
+{
+ va_list args;
+
+ va_start( args, X );
+
+ while( X != NULL )
+ {
+ if( X->p != NULL )
+ {
+ memset( X->p, 0, X->n * ciL );
+ free( X->p );
+ }
+
+ X->s = 1;
+ X->n = 0;
+ X->p = NULL;
+
+ X = va_arg( args, mpi* );
+ }
+
+ va_end( args );
+}
+
+/*
+ * Enlarge to the specified number of limbs
+ */
+int mpi_grow( mpi *X, int nblimbs )
+{
+ t_int *p;
+
+ if( X->n < nblimbs )
+ {
+ if( ( p = (t_int *) malloc( nblimbs * ciL ) ) == NULL )
+ return( 1 );
+
+ memset( p, 0, nblimbs * ciL );
+
+ if( X->p != NULL )
+ {
+ memcpy( p, X->p, X->n * ciL );
+ memset( X->p, 0, X->n * ciL );
+ free( X->p );
+ }
+
+ X->n = nblimbs;
+ X->p = p;
+ }
+
+ return( 0 );
+}
+
+/*
+ * Copy the contents of Y into X
+ */
+int mpi_copy( mpi *X, mpi *Y )
+{
+ int ret, i;
+
+ if( X == Y )
+ return( 0 );
+
+ for( i = Y->n - 1; i > 0; i-- )
+ if( Y->p[i] != 0 )
+ break;
+ i++;
+
+ X->s = Y->s;
+
+ MPI_CHK( mpi_grow( X, i ) );
+
+ memset( X->p, 0, X->n * ciL );
+ memcpy( X->p, Y->p, i * ciL );
+
+cleanup:
+
+ return( ret );
+}
+
+/*
+ * Swap the contents of X and Y
+ */
+void mpi_swap( mpi *X, mpi *Y )
+{
+ mpi T;
+
+ memcpy( &T, X, sizeof( mpi ) );
+ memcpy( X, Y, sizeof( mpi ) );
+ memcpy( Y, &T, sizeof( mpi ) );
+}
+
+/*
+ * Set value from integer
+ */
+int mpi_lset( mpi *X, int z )
+{
+ int ret;
+
+ MPI_CHK( mpi_grow( X, 1 ) );
+ memset( X->p, 0, X->n * ciL );
+
+ X->p[0] = ( z < 0 ) ? -z : z;
+ X->s = ( z < 0 ) ? -1 : 1;
+
+cleanup:
+
+ return( ret );
+}
+
+/*
+ * Return the number of least significant bits
+ */
+int mpi_lsb( mpi *X )
+{
+ int i, j, count = 0;
+
+ for( i = 0; i < X->n; i++ )
+ for( j = 0; j < (int) biL; j++, count++ )
+ if( ( ( X->p[i] >> j ) & 1 ) != 0 )
+ return( count );
+
+ return( 0 );
+}
+
+/*
+ * Return the number of most significant bits
+ */
+int mpi_msb( mpi *X )
+{
+ int i, j;
+
+ for( i = X->n - 1; i > 0; i-- )
+ if( X->p[i] != 0 )
+ break;
+
+ for( j = biL - 1; j >= 0; j-- )
+ if( ( ( X->p[i] >> j ) & 1 ) != 0 )
+ break;
+
+ return( ( i * biL ) + j + 1 );
+}
+
+/*
+ * Return the total size in bytes
+ */
+int mpi_size( mpi *X )
+{
+ return( ( mpi_msb( X ) + 7 ) >> 3 );
+}
+
+/*
+ * Convert an ASCII character to digit value
+ */
+static int mpi_get_digit( t_int *d, int radix, char c )
+{
+ *d = 255;
+
+ if( c >= 0x30 && c <= 0x39 ) *d = c - 0x30;
+ if( c >= 0x41 && c <= 0x46 ) *d = c - 0x37;
+ if( c >= 0x61 && c <= 0x66 ) *d = c - 0x57;
+
+ if( *d >= (t_int) radix )
+ return( POLARSSL_ERR_MPI_INVALID_CHARACTER );
+
+ return( 0 );
+}
+
+/*
+ * Import from an ASCII string
+ */
+int mpi_read_string( mpi *X, int radix, char *s )
+{
+ int ret, i, j, n;
+ t_int d;
+ mpi T;
+
+ if( radix < 2 || radix > 16 )
+ return( POLARSSL_ERR_MPI_BAD_INPUT_DATA );
+
+ mpi_init( &T, NULL );
+
+ if( radix == 16 )
+ {
+ n = BITS_TO_LIMBS( strlen( s ) << 2 );
+
+ MPI_CHK( mpi_grow( X, n ) );
+ MPI_CHK( mpi_lset( X, 0 ) );
+
+ for( i = strlen( s ) - 1, j = 0; i >= 0; i--, j++ )
+ {
+ if( i == 0 && s[i] == '-' )
+ {
+ X->s = -1;
+ break;
+ }
+
+ MPI_CHK( mpi_get_digit( &d, radix, s[i] ) );
+ X->p[j / (2 * ciL)] |= d << ( (j % (2 * ciL)) << 2 );
+ }
+ }
+ else
+ {
+ MPI_CHK( mpi_lset( X, 0 ) );
+
+ for( i = 0; i < (int) strlen( s ); i++ )
+ {
+ if( i == 0 && s[i] == '-' )
+ {
+ X->s = -1;
+ continue;
+ }
+
+ MPI_CHK( mpi_get_digit( &d, radix, s[i] ) );
+ MPI_CHK( mpi_mul_int( &T, X, radix ) );
+ MPI_CHK( mpi_add_int( X, &T, d ) );
+ }
+ }
+
+cleanup:
+
+ mpi_free( &T, NULL );
+
+ return( ret );
+}
+
+/*
+ * Helper to write the digits high-order first
+ */
+static int mpi_write_hlp( mpi *X, int radix, char **p )
+{
+ int ret;
+ t_int r;
+
+ if( radix < 2 || radix > 16 )
+ return( POLARSSL_ERR_MPI_BAD_INPUT_DATA );
+
+ MPI_CHK( mpi_mod_int( &r, X, radix ) );
+ MPI_CHK( mpi_div_int( X, NULL, X, radix ) );
+
+ if( mpi_cmp_int( X, 0 ) != 0 )
+ MPI_CHK( mpi_write_hlp( X, radix, p ) );
+
+ if( r < 10 )
+ *(*p)++ = (char)( r + 0x30 );
+ else
+ *(*p)++ = (char)( r + 0x37 );
+
+cleanup:
+
+ return( ret );
+}
+
+/*
+ * Export into an ASCII string
+ */
+int mpi_write_string( mpi *X, int radix, char *s, int *slen )
+{
+ int ret = 0, n;
+ char *p;
+ mpi T;
+
+ if( radix < 2 || radix > 16 )
+ return( POLARSSL_ERR_MPI_BAD_INPUT_DATA );
+
+ n = mpi_msb( X );
+ if( radix >= 4 ) n >>= 1;
+ if( radix >= 16 ) n >>= 1;
+ n += 3;
+
+ if( *slen < n )
+ {
+ *slen = n;
+ return( POLARSSL_ERR_MPI_BUFFER_TOO_SMALL );
+ }
+
+ p = s;
+ mpi_init( &T, NULL );
+
+ if( X->s == -1 )
+ *p++ = '-';
+
+ if( radix == 16 )
+ {
+ int c, i, j, k;
+
+ for( i = X->n - 1, k = 0; i >= 0; i-- )
+ {
+ for( j = ciL - 1; j >= 0; j-- )
+ {
+ c = ( X->p[i] >> (j << 3) ) & 0xFF;
+
+ if( c == 0 && k == 0 && (i + j) != 0 )
+ continue;
+
+ p += sprintf( p, "%02X", c );
+ k = 1;
+ }
+ }
+ }
+ else
+ {
+ MPI_CHK( mpi_copy( &T, X ) );
+ MPI_CHK( mpi_write_hlp( &T, radix, &p ) );
+ }
+
+ *p++ = '\0';
+ *slen = p - s;
+
+cleanup:
+
+ mpi_free( &T, NULL );
+
+ return( ret );
+}
+
+/*
+ * Read X from an opened file
+ */
+int mpi_read_file( mpi *X, int radix, FILE *fin )
+{
+ t_int d;
+ int slen;
+ char *p;
+ char s[1024];
+
+ memset( s, 0, sizeof( s ) );
+ if( fgets( s, sizeof( s ) - 1, fin ) == NULL )
+ return( POLARSSL_ERR_MPI_FILE_IO_ERROR );
+
+ slen = strlen( s );
+ if( s[slen - 1] == '\n' ) { slen--; s[slen] = '\0'; }
+ if( s[slen - 1] == '\r' ) { slen--; s[slen] = '\0'; }
+
+ p = s + slen;
+ while( --p >= s )
+ if( mpi_get_digit( &d, radix, *p ) != 0 )
+ break;
+
+ return( mpi_read_string( X, radix, p + 1 ) );
+}
+
+/*
+ * Write X into an opened file (or stdout if fout == NULL)
+ */
+int mpi_write_file( char *p, mpi *X, int radix, FILE *fout )
+{
+ int n, ret;
+ size_t slen;
+ size_t plen;
+ char s[1024];
+
+ n = sizeof( s );
+ memset( s, 0, n );
+ n -= 2;
+
+ MPI_CHK( mpi_write_string( X, radix, s, (int *) &n ) );
+
+ if( p == NULL ) p = "";
+
+ plen = strlen( p );
+ slen = strlen( s );
+ s[slen++] = '\r';
+ s[slen++] = '\n';
+
+ if( fout != NULL )
+ {
+ if( fwrite( p, 1, plen, fout ) != plen ||
+ fwrite( s, 1, slen, fout ) != slen )
+ return( POLARSSL_ERR_MPI_FILE_IO_ERROR );
+ }
+ else
+ printf( "%s%s", p, s );
+
+cleanup:
+
+ return( ret );
+}
+
+/*
+ * Import X from unsigned binary data, big endian
+ */
+int mpi_read_binary( mpi *X, unsigned char *buf, int buflen )
+{
+ int ret, i, j, n;
+
+ for( n = 0; n < buflen; n++ )
+ if( buf[n] != 0 )
+ break;
+
+ MPI_CHK( mpi_grow( X, CHARS_TO_LIMBS( buflen - n ) ) );
+ MPI_CHK( mpi_lset( X, 0 ) );
+
+ for( i = buflen - 1, j = 0; i >= n; i--, j++ )
+ X->p[j / ciL] |= ((t_int) buf[i]) << ((j % ciL) << 3);
+
+cleanup:
+
+ return( ret );
+}
+
+/*
+ * Export X into unsigned binary data, big endian
+ */
+int mpi_write_binary( mpi *X, unsigned char *buf, int buflen )
+{
+ int i, j, n;
+
+ n = mpi_size( X );
+
+ if( buflen < n )
+ return( POLARSSL_ERR_MPI_BUFFER_TOO_SMALL );
+
+ memset( buf, 0, buflen );
+
+ for( i = buflen - 1, j = 0; n > 0; i--, j++, n-- )
+ buf[i] = (unsigned char)( X->p[j / ciL] >> ((j % ciL) << 3) );
+
+ return( 0 );
+}
+
+/*
+ * Left-shift: X <<= count
+ */
+int mpi_shift_l( mpi *X, int count )
+{
+ int ret, i, v0, t1;
+ t_int r0 = 0, r1;
+
+ v0 = count / (biL );
+ t1 = count & (biL - 1);
+
+ i = mpi_msb( X ) + count;
+
+ if( X->n * (int) biL < i )
+ MPI_CHK( mpi_grow( X, BITS_TO_LIMBS( i ) ) );
+
+ ret = 0;
+
+ /*
+ * shift by count / limb_size
+ */
+ if( v0 > 0 )
+ {
+ for( i = X->n - 1; i >= v0; i-- )
+ X->p[i] = X->p[i - v0];
+
+ for( ; i >= 0; i-- )
+ X->p[i] = 0;
+ }
+
+ /*
+ * shift by count % limb_size
+ */
+ if( t1 > 0 )
+ {
+ for( i = v0; i < X->n; i++ )
+ {
+ r1 = X->p[i] >> (biL - t1);
+ X->p[i] <<= t1;
+ X->p[i] |= r0;
+ r0 = r1;
+ }
+ }
+
+cleanup:
+
+ return( ret );
+}
+
+/*
+ * Right-shift: X >>= count
+ */
+int mpi_shift_r( mpi *X, int count )
+{
+ int i, v0, v1;
+ t_int r0 = 0, r1;
+
+ v0 = count / biL;
+ v1 = count & (biL - 1);
+
+ /*
+ * shift by count / limb_size
+ */
+ if( v0 > 0 )
+ {
+ for( i = 0; i < X->n - v0; i++ )
+ X->p[i] = X->p[i + v0];
+
+ for( ; i < X->n; i++ )
+ X->p[i] = 0;
+ }
+
+ /*
+ * shift by count % limb_size
+ */
+ if( v1 > 0 )
+ {
+ for( i = X->n - 1; i >= 0; i-- )
+ {
+ r1 = X->p[i] << (biL - v1);
+ X->p[i] >>= v1;
+ X->p[i] |= r0;
+ r0 = r1;
+ }
+ }
+
+ return( 0 );
+}
+
+/*
+ * Compare unsigned values
+ */
+int mpi_cmp_abs( mpi *X, mpi *Y )
+{
+ int i, j;
+
+ for( i = X->n - 1; i >= 0; i-- )
+ if( X->p[i] != 0 )
+ break;
+
+ for( j = Y->n - 1; j >= 0; j-- )
+ if( Y->p[j] != 0 )
+ break;
+
+ if( i < 0 && j < 0 )
+ return( 0 );
+
+ if( i > j ) return( 1 );
+ if( j > i ) return( -1 );
+
+ for( ; i >= 0; i-- )
+ {
+ if( X->p[i] > Y->p[i] ) return( 1 );
+ if( X->p[i] < Y->p[i] ) return( -1 );
+ }
+
+ return( 0 );
+}
+
+/*
+ * Compare signed values
+ */
+int mpi_cmp_mpi( mpi *X, mpi *Y )
+{
+ int i, j;
+
+ for( i = X->n - 1; i >= 0; i-- )
+ if( X->p[i] != 0 )
+ break;
+
+ for( j = Y->n - 1; j >= 0; j-- )
+ if( Y->p[j] != 0 )
+ break;
+
+ if( i < 0 && j < 0 )
+ return( 0 );
+
+ if( i > j ) return( X->s );
+ if( j > i ) return( -X->s );
+
+ if( X->s > 0 && Y->s < 0 ) return( 1 );
+ if( Y->s > 0 && X->s < 0 ) return( -1 );
+
+ for( ; i >= 0; i-- )
+ {
+ if( X->p[i] > Y->p[i] ) return( X->s );
+ if( X->p[i] < Y->p[i] ) return( -X->s );
+ }
+
+ return( 0 );
+}
+
+/*
+ * Compare signed values
+ */
+int mpi_cmp_int( mpi *X, int z )
+{
+ mpi Y;
+ t_int p[1];
+
+ *p = ( z < 0 ) ? -z : z;
+ Y.s = ( z < 0 ) ? -1 : 1;
+ Y.n = 1;
+ Y.p = p;
+
+ return( mpi_cmp_mpi( X, &Y ) );
+}
+
+/*
+ * Unsigned addition: X = |A| + |B| (HAC 14.7)
+ */
+int mpi_add_abs( mpi *X, mpi *A, mpi *B )
+{
+ int ret, i, j;
+ t_int *o, *p, c;
+
+ if( X == B )
+ {
+ mpi *T = A; A = X; B = T;
+ }
+
+ if( X != A )
+ MPI_CHK( mpi_copy( X, A ) );
+
+ for( j = B->n - 1; j >= 0; j-- )
+ if( B->p[j] != 0 )
+ break;
+
+ MPI_CHK( mpi_grow( X, j + 1 ) );
+
+ o = B->p; p = X->p; c = 0;
+
+ for( i = 0; i <= j; i++, o++, p++ )
+ {
+ *p += c; c = ( *p < c );
+ *p += *o; c += ( *p < *o );
+ }
+
+ while( c != 0 )
+ {
+ if( i >= X->n )
+ {
+ MPI_CHK( mpi_grow( X, i + 1 ) );
+ p = X->p + i;
+ }
+
+ *p += c; c = ( *p < c ); i++;
+ }
+
+cleanup:
+
+ return( ret );
+}
+
+/*
+ * Helper for mpi substraction
+ */
+static void mpi_sub_hlp( int n, t_int *s, t_int *d )
+{
+ int i;
+ t_int c, z;
+
+ for( i = c = 0; i < n; i++, s++, d++ )
+ {
+ z = ( *d < c ); *d -= c;
+ c = ( *d < *s ) + z; *d -= *s;
+ }
+
+ while( c != 0 )
+ {
+ z = ( *d < c ); *d -= c;
+ c = z; i++; d++;
+ }
+}
+
+/*
+ * Unsigned substraction: X = |A| - |B| (HAC 14.9)
+ */
+int mpi_sub_abs( mpi *X, mpi *A, mpi *B )
+{
+ mpi TB;
+ int ret, n;
+
+ if( mpi_cmp_abs( A, B ) < 0 )
+ return( POLARSSL_ERR_MPI_NEGATIVE_VALUE );
+
+ mpi_init( &TB, NULL );
+
+ if( X == B )
+ {
+ MPI_CHK( mpi_copy( &TB, B ) );
+ B = &TB;
+ }
+
+ if( X != A )
+ MPI_CHK( mpi_copy( X, A ) );
+
+ ret = 0;
+
+ for( n = B->n - 1; n >= 0; n-- )
+ if( B->p[n] != 0 )
+ break;
+
+ mpi_sub_hlp( n + 1, B->p, X->p );
+
+cleanup:
+
+ mpi_free( &TB, NULL );
+
+ return( ret );
+}
+
+/*
+ * Signed addition: X = A + B
+ */
+int mpi_add_mpi( mpi *X, mpi *A, mpi *B )
+{
+ int ret, s = A->s;
+
+ if( A->s * B->s < 0 )
+ {
+ if( mpi_cmp_abs( A, B ) >= 0 )
+ {
+ MPI_CHK( mpi_sub_abs( X, A, B ) );
+ X->s = s;
+ }
+ else
+ {
+ MPI_CHK( mpi_sub_abs( X, B, A ) );
+ X->s = -s;
+ }
+ }
+ else
+ {
+ MPI_CHK( mpi_add_abs( X, A, B ) );
+ X->s = s;
+ }
+
+cleanup:
+
+ return( ret );
+}
+
+/*
+ * Signed substraction: X = A - B
+ */
+int mpi_sub_mpi( mpi *X, mpi *A, mpi *B )
+{
+ int ret, s = A->s;
+
+ if( A->s * B->s > 0 )
+ {
+ if( mpi_cmp_abs( A, B ) >= 0 )
+ {
+ MPI_CHK( mpi_sub_abs( X, A, B ) );
+ X->s = s;
+ }
+ else
+ {
+ MPI_CHK( mpi_sub_abs( X, B, A ) );
+ X->s = -s;
+ }
+ }
+ else
+ {
+ MPI_CHK( mpi_add_abs( X, A, B ) );
+ X->s = s;
+ }
+
+cleanup:
+
+ return( ret );
+}
+
+/*
+ * Signed addition: X = A + b
+ */
+int mpi_add_int( mpi *X, mpi *A, int b )
+{
+ mpi _B;
+ t_int p[1];
+
+ p[0] = ( b < 0 ) ? -b : b;
+ _B.s = ( b < 0 ) ? -1 : 1;
+ _B.n = 1;
+ _B.p = p;
+
+ return( mpi_add_mpi( X, A, &_B ) );
+}
+
+/*
+ * Signed substraction: X = A - b
+ */
+int mpi_sub_int( mpi *X, mpi *A, int b )
+{
+ mpi _B;
+ t_int p[1];
+
+ p[0] = ( b < 0 ) ? -b : b;
+ _B.s = ( b < 0 ) ? -1 : 1;
+ _B.n = 1;
+ _B.p = p;
+
+ return( mpi_sub_mpi( X, A, &_B ) );
+}
+
+/*
+ * Helper for mpi multiplication
+ */
+static void mpi_mul_hlp( int i, t_int *s, t_int *d, t_int b )
+{
+ t_int c = 0, t = 0;
+
+#if defined(MULADDC_HUIT)
+ for( ; i >= 8; i -= 8 )
+ {
+ MULADDC_INIT
+ MULADDC_HUIT
+ MULADDC_STOP
+ }
+
+ for( ; i > 0; i-- )
+ {
+ MULADDC_INIT
+ MULADDC_CORE
+ MULADDC_STOP
+ }
+#else
+ for( ; i >= 16; i -= 16 )
+ {
+ MULADDC_INIT
+ MULADDC_CORE MULADDC_CORE
+ MULADDC_CORE MULADDC_CORE
+ MULADDC_CORE MULADDC_CORE
+ MULADDC_CORE MULADDC_CORE
+
+ MULADDC_CORE MULADDC_CORE
+ MULADDC_CORE MULADDC_CORE
+ MULADDC_CORE MULADDC_CORE
+ MULADDC_CORE MULADDC_CORE
+ MULADDC_STOP
+ }
+
+ for( ; i >= 8; i -= 8 )
+ {
+ MULADDC_INIT
+ MULADDC_CORE MULADDC_CORE
+ MULADDC_CORE MULADDC_CORE
+
+ MULADDC_CORE MULADDC_CORE
+ MULADDC_CORE MULADDC_CORE
+ MULADDC_STOP
+ }
+
+ for( ; i > 0; i-- )
+ {
+ MULADDC_INIT
+ MULADDC_CORE
+ MULADDC_STOP
+ }
+#endif
+
+ t++;
+
+ do {
+ *d += c; c = ( *d < c ); d++;
+ }
+ while( c != 0 );
+}
+
+/*
+ * Baseline multiplication: X = A * B (HAC 14.12)
+ */
+int mpi_mul_mpi( mpi *X, mpi *A, mpi *B )
+{
+ int ret, i, j;
+ mpi TA, TB;
+
+ mpi_init( &TA, &TB, NULL );
+
+ if( X == A ) { MPI_CHK( mpi_copy( &TA, A ) ); A = &TA; }
+ if( X == B ) { MPI_CHK( mpi_copy( &TB, B ) ); B = &TB; }
+
+ for( i = A->n - 1; i >= 0; i-- )
+ if( A->p[i] != 0 )
+ break;
+
+ for( j = B->n - 1; j >= 0; j-- )
+ if( B->p[j] != 0 )
+ break;
+
+ MPI_CHK( mpi_grow( X, i + j + 2 ) );
+ MPI_CHK( mpi_lset( X, 0 ) );
+
+ for( i++; j >= 0; j-- )
+ mpi_mul_hlp( i, A->p, X->p + j, B->p[j] );
+
+ X->s = A->s * B->s;
+
+cleanup:
+
+ mpi_free( &TB, &TA, NULL );
+
+ return( ret );
+}
+
+/*
+ * Baseline multiplication: X = A * b
+ */
+int mpi_mul_int( mpi *X, mpi *A, t_int b )
+{
+ mpi _B;
+ t_int p[1];
+
+ _B.s = 1;
+ _B.n = 1;
+ _B.p = p;
+ p[0] = b;
+
+ return( mpi_mul_mpi( X, A, &_B ) );
+}
+
+/*
+ * Division by mpi: A = Q * B + R (HAC 14.20)
+ */
+int mpi_div_mpi( mpi *Q, mpi *R, mpi *A, mpi *B )
+{
+ int ret, i, n, t, k;
+ mpi X, Y, Z, T1, T2;
+
+ if( mpi_cmp_int( B, 0 ) == 0 )
+ return( POLARSSL_ERR_MPI_DIVISION_BY_ZERO );
+
+ mpi_init( &X, &Y, &Z, &T1, &T2, NULL );
+
+ if( mpi_cmp_abs( A, B ) < 0 )
+ {
+ if( Q != NULL ) MPI_CHK( mpi_lset( Q, 0 ) );
+ if( R != NULL ) MPI_CHK( mpi_copy( R, A ) );
+ return( 0 );
+ }
+
+ MPI_CHK( mpi_copy( &X, A ) );
+ MPI_CHK( mpi_copy( &Y, B ) );
+ X.s = Y.s = 1;
+
+ MPI_CHK( mpi_grow( &Z, A->n + 2 ) );
+ MPI_CHK( mpi_lset( &Z, 0 ) );
+ MPI_CHK( mpi_grow( &T1, 2 ) );
+ MPI_CHK( mpi_grow( &T2, 3 ) );
+
+ k = mpi_msb( &Y ) % biL;
+ if( k < (int) biL - 1 )
+ {
+ k = biL - 1 - k;
+ MPI_CHK( mpi_shift_l( &X, k ) );
+ MPI_CHK( mpi_shift_l( &Y, k ) );
+ }
+ else k = 0;
+
+ n = X.n - 1;
+ t = Y.n - 1;
+ mpi_shift_l( &Y, biL * (n - t) );
+
+ while( mpi_cmp_mpi( &X, &Y ) >= 0 )
+ {
+ Z.p[n - t]++;
+ mpi_sub_mpi( &X, &X, &Y );
+ }
+ mpi_shift_r( &Y, biL * (n - t) );
+
+ for( i = n; i > t ; i-- )
+ {
+ if( X.p[i] >= Y.p[t] )
+ Z.p[i - t - 1] = ~0;
+ else
+ {
+#if defined(POLARSSL_HAVE_LONGLONG)
+ t_dbl r;
+
+ r = (t_dbl) X.p[i] << biL;
+ r |= (t_dbl) X.p[i - 1];
+ r /= Y.p[t];
+ if( r > ((t_dbl) 1 << biL) - 1)
+ r = ((t_dbl) 1 << biL) - 1;
+
+ Z.p[i - t - 1] = (t_int) r;
+#else
+ /*
+ * __udiv_qrnnd_c, from gmp/longlong.h
+ */
+ t_int q0, q1, r0, r1;
+ t_int d0, d1, d, m;
+
+ d = Y.p[t];
+ d0 = ( d << biH ) >> biH;
+ d1 = ( d >> biH );
+
+ q1 = X.p[i] / d1;
+ r1 = X.p[i] - d1 * q1;
+ r1 <<= biH;
+ r1 |= ( X.p[i - 1] >> biH );
+
+ m = q1 * d0;
+ if( r1 < m )
+ {
+ q1--, r1 += d;
+ while( r1 >= d && r1 < m )
+ q1--, r1 += d;
+ }
+ r1 -= m;
+
+ q0 = r1 / d1;
+ r0 = r1 - d1 * q0;
+ r0 <<= biH;
+ r0 |= ( X.p[i - 1] << biH ) >> biH;
+
+ m = q0 * d0;
+ if( r0 < m )
+ {
+ q0--, r0 += d;
+ while( r0 >= d && r0 < m )
+ q0--, r0 += d;
+ }
+ r0 -= m;
+
+ Z.p[i - t - 1] = ( q1 << biH ) | q0;
+#endif
+ }
+
+ Z.p[i - t - 1]++;
+ do
+ {
+ Z.p[i - t - 1]--;
+
+ MPI_CHK( mpi_lset( &T1, 0 ) );
+ T1.p[0] = (t < 1) ? 0 : Y.p[t - 1];
+ T1.p[1] = Y.p[t];
+ MPI_CHK( mpi_mul_int( &T1, &T1, Z.p[i - t - 1] ) );
+
+ MPI_CHK( mpi_lset( &T2, 0 ) );
+ T2.p[0] = (i < 2) ? 0 : X.p[i - 2];
+ T2.p[1] = (i < 1) ? 0 : X.p[i - 1];
+ T2.p[2] = X.p[i];
+ }
+ while( mpi_cmp_mpi( &T1, &T2 ) > 0 );
+
+ MPI_CHK( mpi_mul_int( &T1, &Y, Z.p[i - t - 1] ) );
+ MPI_CHK( mpi_shift_l( &T1, biL * (i - t - 1) ) );
+ MPI_CHK( mpi_sub_mpi( &X, &X, &T1 ) );
+
+ if( mpi_cmp_int( &X, 0 ) < 0 )
+ {
+ MPI_CHK( mpi_copy( &T1, &Y ) );
+ MPI_CHK( mpi_shift_l( &T1, biL * (i - t - 1) ) );
+ MPI_CHK( mpi_add_mpi( &X, &X, &T1 ) );
+ Z.p[i - t - 1]--;
+ }
+ }
+
+ if( Q != NULL )
+ {
+ mpi_copy( Q, &Z );
+ Q->s = A->s * B->s;
+ }
+
+ if( R != NULL )
+ {
+ mpi_shift_r( &X, k );
+ mpi_copy( R, &X );
+
+ R->s = A->s;
+ if( mpi_cmp_int( R, 0 ) == 0 )
+ R->s = 1;
+ }
+
+cleanup:
+
+ mpi_free( &X, &Y, &Z, &T1, &T2, NULL );
+
+ return( ret );
+}
+
+/*
+ * Division by int: A = Q * b + R
+ *
+ * Returns 0 if successful
+ * 1 if memory allocation failed
+ * POLARSSL_ERR_MPI_DIVISION_BY_ZERO if b == 0
+ */
+int mpi_div_int( mpi *Q, mpi *R, mpi *A, int b )
+{
+ mpi _B;
+ t_int p[1];
+
+ p[0] = ( b < 0 ) ? -b : b;
+ _B.s = ( b < 0 ) ? -1 : 1;
+ _B.n = 1;
+ _B.p = p;
+
+ return( mpi_div_mpi( Q, R, A, &_B ) );
+}
+
+/*
+ * Modulo: R = A mod B
+ */
+int mpi_mod_mpi( mpi *R, mpi *A, mpi *B )
+{
+ int ret;
+
+ MPI_CHK( mpi_div_mpi( NULL, R, A, B ) );
+
+ while( mpi_cmp_int( R, 0 ) < 0 )
+ MPI_CHK( mpi_add_mpi( R, R, B ) );
+
+ while( mpi_cmp_mpi( R, B ) >= 0 )
+ MPI_CHK( mpi_sub_mpi( R, R, B ) );
+
+cleanup:
+
+ return( ret );
+}
+
+/*
+ * Modulo: r = A mod b
+ */
+int mpi_mod_int( t_int *r, mpi *A, int b )
+{
+ int i;
+ t_int x, y, z;
+
+ if( b == 0 )
+ return( POLARSSL_ERR_MPI_DIVISION_BY_ZERO );
+
+ if( b < 0 )
+ b = -b;
+
+ /*
+ * handle trivial cases
+ */
+ if( b == 1 )
+ {
+ *r = 0;
+ return( 0 );
+ }
+
+ if( b == 2 )
+ {
+ *r = A->p[0] & 1;
+ return( 0 );
+ }
+
+ /*
+ * general case
+ */
+ for( i = A->n - 1, y = 0; i >= 0; i-- )
+ {
+ x = A->p[i];
+ y = ( y << biH ) | ( x >> biH );
+ z = y / b;
+ y -= z * b;
+
+ x <<= biH;
+ y = ( y << biH ) | ( x >> biH );
+ z = y / b;
+ y -= z * b;
+ }
+
+ *r = y;
+
+ return( 0 );
+}
+
+/*
+ * Fast Montgomery initialization (thanks to Tom St Denis)
+ */
+static void mpi_montg_init( t_int *mm, mpi *N )
+{
+ t_int x, m0 = N->p[0];
+
+ x = m0;
+ x += ( ( m0 + 2 ) & 4 ) << 1;
+ x *= ( 2 - ( m0 * x ) );
+
+ if( biL >= 16 ) x *= ( 2 - ( m0 * x ) );
+ if( biL >= 32 ) x *= ( 2 - ( m0 * x ) );
+ if( biL >= 64 ) x *= ( 2 - ( m0 * x ) );
+
+ *mm = ~x + 1;
+}
+
+/*
+ * Montgomery multiplication: A = A * B * R^-1 mod N (HAC 14.36)
+ */
+static void mpi_montmul( mpi *A, mpi *B, mpi *N, t_int mm, mpi *T )
+{
+ int i, n, m;
+ t_int u0, u1, *d;
+
+ memset( T->p, 0, T->n * ciL );
+
+ d = T->p;
+ n = N->n;
+ m = ( B->n < n ) ? B->n : n;
+
+ for( i = 0; i < n; i++ )
+ {
+ /*
+ * T = (T + u0*B + u1*N) / 2^biL
+ */
+ u0 = A->p[i];
+ u1 = ( d[0] + u0 * B->p[0] ) * mm;
+
+ mpi_mul_hlp( m, B->p, d, u0 );
+ mpi_mul_hlp( n, N->p, d, u1 );
+
+ *d++ = u0; d[n + 1] = 0;
+ }
+
+ memcpy( A->p, d, (n + 1) * ciL );
+
+ if( mpi_cmp_abs( A, N ) >= 0 )
+ mpi_sub_hlp( n, N->p, A->p );
+ else
+ /* prevent timing attacks */
+ mpi_sub_hlp( n, A->p, T->p );
+}
+
+/*
+ * Montgomery reduction: A = A * R^-1 mod N
+ */
+static void mpi_montred( mpi *A, mpi *N, t_int mm, mpi *T )
+{
+ t_int z = 1;
+ mpi U;
+
+ U.n = U.s = z;
+ U.p = &z;
+
+ mpi_montmul( A, &U, N, mm, T );
+}
+
+/*
+ * Sliding-window exponentiation: X = A^E mod N (HAC 14.85)
+ */
+int mpi_exp_mod( mpi *X, mpi *A, mpi *E, mpi *N, mpi *_RR )
+{
+ int ret, i, j, wsize, wbits;
+ int bufsize, nblimbs, nbits;
+ t_int ei, mm, state;
+ mpi RR, T, W[64];
+
+ if( mpi_cmp_int( N, 0 ) < 0 || ( N->p[0] & 1 ) == 0 )
+ return( POLARSSL_ERR_MPI_BAD_INPUT_DATA );
+
+ /*
+ * Init temps and window size
+ */
+ mpi_montg_init( &mm, N );
+ mpi_init( &RR, &T, NULL );
+ memset( W, 0, sizeof( W ) );
+
+ i = mpi_msb( E );
+
+ wsize = ( i > 671 ) ? 6 : ( i > 239 ) ? 5 :
+ ( i > 79 ) ? 4 : ( i > 23 ) ? 3 : 1;
+
+ j = N->n + 1;
+ MPI_CHK( mpi_grow( X, j ) );
+ MPI_CHK( mpi_grow( &W[1], j ) );
+ MPI_CHK( mpi_grow( &T, j * 2 ) );
+
+ /*
+ * If 1st call, pre-compute R^2 mod N
+ */
+ if( _RR == NULL || _RR->p == NULL )
+ {
+ MPI_CHK( mpi_lset( &RR, 1 ) );
+ MPI_CHK( mpi_shift_l( &RR, N->n * 2 * biL ) );
+ MPI_CHK( mpi_mod_mpi( &RR, &RR, N ) );
+
+ if( _RR != NULL )
+ memcpy( _RR, &RR, sizeof( mpi ) );
+ }
+ else
+ memcpy( &RR, _RR, sizeof( mpi ) );
+
+ /*
+ * W[1] = A * R^2 * R^-1 mod N = A * R mod N
+ */
+ if( mpi_cmp_mpi( A, N ) >= 0 )
+ mpi_mod_mpi( &W[1], A, N );
+ else mpi_copy( &W[1], A );
+
+ mpi_montmul( &W[1], &RR, N, mm, &T );
+
+ /*
+ * X = R^2 * R^-1 mod N = R mod N
+ */
+ MPI_CHK( mpi_copy( X, &RR ) );
+ mpi_montred( X, N, mm, &T );
+
+ if( wsize > 1 )
+ {
+ /*
+ * W[1 << (wsize - 1)] = W[1] ^ (wsize - 1)
+ */
+ j = 1 << (wsize - 1);
+
+ MPI_CHK( mpi_grow( &W[j], N->n + 1 ) );
+ MPI_CHK( mpi_copy( &W[j], &W[1] ) );
+
+ for( i = 0; i < wsize - 1; i++ )
+ mpi_montmul( &W[j], &W[j], N, mm, &T );
+
+ /*
+ * W[i] = W[i - 1] * W[1]
+ */
+ for( i = j + 1; i < (1 << wsize); i++ )
+ {
+ MPI_CHK( mpi_grow( &W[i], N->n + 1 ) );
+ MPI_CHK( mpi_copy( &W[i], &W[i - 1] ) );
+
+ mpi_montmul( &W[i], &W[1], N, mm, &T );
+ }
+ }
+
+ nblimbs = E->n;
+ bufsize = 0;
+ nbits = 0;
+ wbits = 0;
+ state = 0;
+
+ while( 1 )
+ {
+ if( bufsize == 0 )
+ {
+ if( nblimbs-- == 0 )
+ break;
+
+ bufsize = sizeof( t_int ) << 3;
+ }
+
+ bufsize--;
+
+ ei = (E->p[nblimbs] >> bufsize) & 1;
+
+ /*
+ * skip leading 0s
+ */
+ if( ei == 0 && state == 0 )
+ continue;
+
+ if( ei == 0 && state == 1 )
+ {
+ /*
+ * out of window, square X
+ */
+ mpi_montmul( X, X, N, mm, &T );
+ continue;
+ }
+
+ /*
+ * add ei to current window
+ */
+ state = 2;
+
+ nbits++;
+ wbits |= (ei << (wsize - nbits));
+
+ if( nbits == wsize )
+ {
+ /*
+ * X = X^wsize R^-1 mod N
+ */
+ for( i = 0; i < wsize; i++ )
+ mpi_montmul( X, X, N, mm, &T );
+
+ /*
+ * X = X * W[wbits] R^-1 mod N
+ */
+ mpi_montmul( X, &W[wbits], N, mm, &T );
+
+ state--;
+ nbits = 0;
+ wbits = 0;
+ }
+ }
+
+ /*
+ * process the remaining bits
+ */
+ for( i = 0; i < nbits; i++ )
+ {
+ mpi_montmul( X, X, N, mm, &T );
+
+ wbits <<= 1;
+
+ if( (wbits & (1 << wsize)) != 0 )
+ mpi_montmul( X, &W[1], N, mm, &T );
+ }
+
+ /*
+ * X = A^E * R * R^-1 mod N = A^E mod N
+ */
+ mpi_montred( X, N, mm, &T );
+
+cleanup:
+
+ for( i = (1 << (wsize - 1)); i < (1 << wsize); i++ )
+ mpi_free( &W[i], NULL );
+
+ if( _RR != NULL )
+ mpi_free( &W[1], &T, NULL );
+ else mpi_free( &W[1], &T, &RR, NULL );
+
+ return( ret );
+}
+
+/*
+ * Greatest common divisor: G = gcd(A, B) (HAC 14.54)
+ */
+int mpi_gcd( mpi *G, mpi *A, mpi *B )
+{
+ int ret;
+ mpi TG, TA, TB;
+
+ mpi_init( &TG, &TA, &TB, NULL );
+
+ MPI_CHK( mpi_lset( &TG, 1 ) );
+ MPI_CHK( mpi_copy( &TA, A ) );
+ MPI_CHK( mpi_copy( &TB, B ) );
+
+ TA.s = TB.s = 1;
+
+ while( mpi_cmp_int( &TA, 0 ) != 0 )
+ {
+ while( ( TA.p[0] & 1 ) == 0 ) MPI_CHK( mpi_shift_r( &TA, 1 ) );
+ while( ( TB.p[0] & 1 ) == 0 ) MPI_CHK( mpi_shift_r( &TB, 1 ) );
+
+ if( mpi_cmp_mpi( &TA, &TB ) >= 0 )
+ {
+ MPI_CHK( mpi_sub_abs( &TA, &TA, &TB ) );
+ MPI_CHK( mpi_shift_r( &TA, 1 ) );
+ }
+ else
+ {
+ MPI_CHK( mpi_sub_abs( &TB, &TB, &TA ) );
+ MPI_CHK( mpi_shift_r( &TB, 1 ) );
+ }
+ }
+
+ MPI_CHK( mpi_mul_mpi( G, &TG, &TB ) );
+
+cleanup:
+
+ mpi_free( &TB, &TA, &TG, NULL );
+
+ return( ret );
+}
+
+/*
+ * Modular inverse: X = A^-1 mod N (HAC 14.61 / 14.64)
+ */
+int mpi_inv_mod( mpi *X, mpi *A, mpi *N )
+{
+ int ret;
+ mpi G, TA, TU, U1, U2, TB, TV, V1, V2;
+
+ if( mpi_cmp_int( N, 0 ) <= 0 )
+ return( POLARSSL_ERR_MPI_BAD_INPUT_DATA );
+
+ mpi_init( &TA, &TU, &U1, &U2, &G,
+ &TB, &TV, &V1, &V2, NULL );
+
+ MPI_CHK( mpi_gcd( &G, A, N ) );
+
+ if( mpi_cmp_int( &G, 1 ) != 0 )
+ {
+ ret = POLARSSL_ERR_MPI_NOT_ACCEPTABLE;
+ goto cleanup;
+ }
+
+ MPI_CHK( mpi_mod_mpi( &TA, A, N ) );
+ MPI_CHK( mpi_copy( &TU, &TA ) );
+ MPI_CHK( mpi_copy( &TB, N ) );
+ MPI_CHK( mpi_copy( &TV, N ) );
+
+ MPI_CHK( mpi_lset( &U1, 1 ) );
+ MPI_CHK( mpi_lset( &U2, 0 ) );
+ MPI_CHK( mpi_lset( &V1, 0 ) );
+ MPI_CHK( mpi_lset( &V2, 1 ) );
+
+ do
+ {
+ while( ( TU.p[0] & 1 ) == 0 )
+ {
+ MPI_CHK( mpi_shift_r( &TU, 1 ) );
+
+ if( ( U1.p[0] & 1 ) != 0 || ( U2.p[0] & 1 ) != 0 )
+ {
+ MPI_CHK( mpi_add_mpi( &U1, &U1, &TB ) );
+ MPI_CHK( mpi_sub_mpi( &U2, &U2, &TA ) );
+ }
+
+ MPI_CHK( mpi_shift_r( &U1, 1 ) );
+ MPI_CHK( mpi_shift_r( &U2, 1 ) );
+ }
+
+ while( ( TV.p[0] & 1 ) == 0 )
+ {
+ MPI_CHK( mpi_shift_r( &TV, 1 ) );
+
+ if( ( V1.p[0] & 1 ) != 0 || ( V2.p[0] & 1 ) != 0 )
+ {
+ MPI_CHK( mpi_add_mpi( &V1, &V1, &TB ) );
+ MPI_CHK( mpi_sub_mpi( &V2, &V2, &TA ) );
+ }
+
+ MPI_CHK( mpi_shift_r( &V1, 1 ) );
+ MPI_CHK( mpi_shift_r( &V2, 1 ) );
+ }
+
+ if( mpi_cmp_mpi( &TU, &TV ) >= 0 )
+ {
+ MPI_CHK( mpi_sub_mpi( &TU, &TU, &TV ) );
+ MPI_CHK( mpi_sub_mpi( &U1, &U1, &V1 ) );
+ MPI_CHK( mpi_sub_mpi( &U2, &U2, &V2 ) );
+ }
+ else
+ {
+ MPI_CHK( mpi_sub_mpi( &TV, &TV, &TU ) );
+ MPI_CHK( mpi_sub_mpi( &V1, &V1, &U1 ) );
+ MPI_CHK( mpi_sub_mpi( &V2, &V2, &U2 ) );
+ }
+ }
+ while( mpi_cmp_int( &TU, 0 ) != 0 );
+
+ while( mpi_cmp_int( &V1, 0 ) < 0 )
+ MPI_CHK( mpi_add_mpi( &V1, &V1, N ) );
+
+ while( mpi_cmp_mpi( &V1, N ) >= 0 )
+ MPI_CHK( mpi_sub_mpi( &V1, &V1, N ) );
+
+ MPI_CHK( mpi_copy( X, &V1 ) );
+
+cleanup:
+
+ mpi_free( &V2, &V1, &TV, &TB, &G,
+ &U2, &U1, &TU, &TA, NULL );
+
+ return( ret );
+}
+
+static const int small_prime[] =
+{
+ 3, 5, 7, 11, 13, 17, 19, 23,
+ 29, 31, 37, 41, 43, 47, 53, 59,
+ 61, 67, 71, 73, 79, 83, 89, 97,
+ 101, 103, 107, 109, 113, 127, 131, 137,
+ 139, 149, 151, 157, 163, 167, 173, 179,
+ 181, 191, 193, 197, 199, 211, 223, 227,
+ 229, 233, 239, 241, 251, 257, 263, 269,
+ 271, 277, 281, 283, 293, 307, 311, 313,
+ 317, 331, 337, 347, 349, 353, 359, 367,
+ 373, 379, 383, 389, 397, 401, 409, 419,
+ 421, 431, 433, 439, 443, 449, 457, 461,
+ 463, 467, 479, 487, 491, 499, 503, 509,
+ 521, 523, 541, 547, 557, 563, 569, 571,
+ 577, 587, 593, 599, 601, 607, 613, 617,
+ 619, 631, 641, 643, 647, 653, 659, 661,
+ 673, 677, 683, 691, 701, 709, 719, 727,
+ 733, 739, 743, 751, 757, 761, 769, 773,
+ 787, 797, 809, 811, 821, 823, 827, 829,
+ 839, 853, 857, 859, 863, 877, 881, 883,
+ 887, 907, 911, 919, 929, 937, 941, 947,
+ 953, 967, 971, 977, 983, 991, 997, -103
+};
+
+/*
+ * Miller-Rabin primality test (HAC 4.24)
+ */
+int mpi_is_prime( mpi *X, int (*f_rng)(void *), void *p_rng )
+{
+ int ret, i, j, n, s, xs;
+ mpi W, R, T, A, RR;
+ unsigned char *p;
+
+ if( mpi_cmp_int( X, 0 ) == 0 )
+ return( 0 );
+
+ mpi_init( &W, &R, &T, &A, &RR, NULL );
+
+ xs = X->s; X->s = 1;
+
+ /*
+ * test trivial factors first
+ */
+ if( ( X->p[0] & 1 ) == 0 )
+ return( POLARSSL_ERR_MPI_NOT_ACCEPTABLE );
+
+ for( i = 0; small_prime[i] > 0; i++ )
+ {
+ t_int r;
+
+ if( mpi_cmp_int( X, small_prime[i] ) <= 0 )
+ return( 0 );
+
+ MPI_CHK( mpi_mod_int( &r, X, small_prime[i] ) );
+
+ if( r == 0 )
+ return( POLARSSL_ERR_MPI_NOT_ACCEPTABLE );
+ }
+
+ /*
+ * W = |X| - 1
+ * R = W >> lsb( W )
+ */
+ s = mpi_lsb( &W );
+ MPI_CHK( mpi_sub_int( &W, X, 1 ) );
+ MPI_CHK( mpi_copy( &R, &W ) );
+ MPI_CHK( mpi_shift_r( &R, s ) );
+
+ i = mpi_msb( X );
+ /*
+ * HAC, table 4.4
+ */
+ n = ( ( i >= 1300 ) ? 2 : ( i >= 850 ) ? 3 :
+ ( i >= 650 ) ? 4 : ( i >= 350 ) ? 8 :
+ ( i >= 250 ) ? 12 : ( i >= 150 ) ? 18 : 27 );
+
+ for( i = 0; i < n; i++ )
+ {
+ /*
+ * pick a random A, 1 < A < |X| - 1
+ */
+ MPI_CHK( mpi_grow( &A, X->n ) );
+
+ p = (unsigned char *) A.p;
+ for( j = 0; j < A.n * ciL; j++ )
+ *p++ = (unsigned char) f_rng( p_rng );
+
+ j = mpi_msb( &A ) - mpi_msb( &W );
+ MPI_CHK( mpi_shift_r( &A, j + 1 ) );
+ A.p[0] |= 3;
+
+ /*
+ * A = A^R mod |X|
+ */
+ MPI_CHK( mpi_exp_mod( &A, &A, &R, X, &RR ) );
+
+ if( mpi_cmp_mpi( &A, &W ) == 0 ||
+ mpi_cmp_int( &A, 1 ) == 0 )
+ continue;
+
+ j = 1;
+ while( j < s && mpi_cmp_mpi( &A, &W ) != 0 )
+ {
+ /*
+ * A = A * A mod |X|
+ */
+ MPI_CHK( mpi_mul_mpi( &T, &A, &A ) );
+ MPI_CHK( mpi_mod_mpi( &A, &T, X ) );
+
+ if( mpi_cmp_int( &A, 1 ) == 0 )
+ break;
+
+ j++;
+ }
+
+ /*
+ * not prime if A != |X| - 1 or A == 1
+ */
+ if( mpi_cmp_mpi( &A, &W ) != 0 ||
+ mpi_cmp_int( &A, 1 ) == 0 )
+ {
+ ret = POLARSSL_ERR_MPI_NOT_ACCEPTABLE;
+ break;
+ }
+ }
+
+cleanup:
+
+ X->s = xs;
+
+ mpi_free( &RR, &A, &T, &R, &W, NULL );
+
+ return( ret );
+}
+
+/*
+ * Prime number generation
+ */
+int mpi_gen_prime( mpi *X, int nbits, int dh_flag,
+ int (*f_rng)(void *), void *p_rng )
+{
+ int ret, k, n;
+ unsigned char *p;
+ mpi Y;
+
+ if( nbits < 3 )
+ return( POLARSSL_ERR_MPI_BAD_INPUT_DATA );
+
+ mpi_init( &Y, NULL );
+
+ n = BITS_TO_LIMBS( nbits );
+
+ MPI_CHK( mpi_grow( X, n ) );
+ MPI_CHK( mpi_lset( X, 0 ) );
+
+ p = (unsigned char *) X->p;
+ for( k = 0; k < X->n * ciL; k++ )
+ *p++ = (unsigned char) f_rng( p_rng );
+
+ k = mpi_msb( X );
+ if( k < nbits ) MPI_CHK( mpi_shift_l( X, nbits - k ) );
+ if( k > nbits ) MPI_CHK( mpi_shift_r( X, k - nbits ) );
+
+ X->p[0] |= 3;
+
+ if( dh_flag == 0 )
+ {
+ while( ( ret = mpi_is_prime( X, f_rng, p_rng ) ) != 0 )
+ {
+ if( ret != POLARSSL_ERR_MPI_NOT_ACCEPTABLE )
+ goto cleanup;
+
+ MPI_CHK( mpi_add_int( X, X, 2 ) );
+ }
+ }
+ else
+ {
+ MPI_CHK( mpi_sub_int( &Y, X, 1 ) );
+ MPI_CHK( mpi_shift_r( &Y, 1 ) );
+
+ while( 1 )
+ {
+ if( ( ret = mpi_is_prime( X, f_rng, p_rng ) ) == 0 )
+ {
+ if( ( ret = mpi_is_prime( &Y, f_rng, p_rng ) ) == 0 )
+ break;
+
+ if( ret != POLARSSL_ERR_MPI_NOT_ACCEPTABLE )
+ goto cleanup;
+ }
+
+ if( ret != POLARSSL_ERR_MPI_NOT_ACCEPTABLE )
+ goto cleanup;
+
+ MPI_CHK( mpi_add_int( &Y, X, 1 ) );
+ MPI_CHK( mpi_add_int( X, X, 2 ) );
+ MPI_CHK( mpi_shift_r( &Y, 1 ) );
+ }
+ }
+
+cleanup:
+
+ mpi_free( &Y, NULL );
+
+ return( ret );
+}
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/bignum.h,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/**
+ * \file bignum.h
+ *
+ * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
+ *
+ * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef POLARSSL_BIGNUM_H
+#define POLARSSL_BIGNUM_H
+
+#include <stdio.h>
+
+#define POLARSSL_ERR_MPI_FILE_IO_ERROR -0x0002
+#define POLARSSL_ERR_MPI_BAD_INPUT_DATA -0x0004
+#define POLARSSL_ERR_MPI_INVALID_CHARACTER -0x0006
+#define POLARSSL_ERR_MPI_BUFFER_TOO_SMALL -0x0008
+#define POLARSSL_ERR_MPI_NEGATIVE_VALUE -0x000A
+#define POLARSSL_ERR_MPI_DIVISION_BY_ZERO -0x000C
+#define POLARSSL_ERR_MPI_NOT_ACCEPTABLE -0x000E
+
+#define MPI_CHK(f) if( ( ret = f ) != 0 ) goto cleanup
+
+/*
+ * Define the base integer type, architecture-wise
+ */
+#if defined(POLARSSL_HAVE_INT8)
+typedef unsigned char t_int;
+typedef unsigned short t_dbl;
+#else
+#if defined(POLARSSL_HAVE_INT16)
+typedef unsigned short t_int;
+typedef unsigned long t_dbl;
+#else
+ typedef unsigned long t_int;
+ #if defined(_MSC_VER) && defined(_M_IX86)
+ typedef unsigned __int64 t_dbl;
+ #else
+ #if defined(__amd64__) || defined(__x86_64__) || \
+ defined(__ppc64__) || defined(__powerpc64__) || \
+ defined(__ia64__) || defined(__alpha__)
+ typedef unsigned int t_dbl __attribute__((mode(TI)));
+ #else
+ typedef unsigned long long t_dbl;
+ #endif
+ #endif
+#endif
+#endif
+
+/**
+ * \brief MPI structure
+ */
+typedef struct
+{
+ int s; /*!< integer sign */
+ int n; /*!< total # of limbs */
+ t_int *p; /*!< pointer to limbs */
+}
+mpi;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Initialize one or more mpi
+ */
+void mpi_init( mpi *X, ... );
+
+/**
+ * \brief Unallocate one or more mpi
+ */
+void mpi_free( mpi *X, ... );
+
+/**
+ * \brief Enlarge to the specified number of limbs
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_grow( mpi *X, int nblimbs );
+
+/**
+ * \brief Copy the contents of Y into X
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_copy( mpi *X, mpi *Y );
+
+/**
+ * \brief Swap the contents of X and Y
+ */
+void mpi_swap( mpi *X, mpi *Y );
+
+/**
+ * \brief Set value from integer
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_lset( mpi *X, int z );
+
+/**
+ * \brief Return the number of least significant bits
+ */
+int mpi_lsb( mpi *X );
+
+/**
+ * \brief Return the number of most significant bits
+ */
+int mpi_msb( mpi *X );
+
+/**
+ * \brief Return the total size in bytes
+ */
+int mpi_size( mpi *X );
+
+/**
+ * \brief Import from an ASCII string
+ *
+ * \param X destination mpi
+ * \param radix input numeric base
+ * \param s null-terminated string buffer
+ *
+ * \return 0 if successful, or an POLARSSL_ERR_MPI_XXX error code
+ */
+int mpi_read_string( mpi *X, int radix, char *s );
+
+/**
+ * \brief Export into an ASCII string
+ *
+ * \param X source mpi
+ * \param radix output numeric base
+ * \param s string buffer
+ * \param slen string buffer size
+ *
+ * \return 0 if successful, or an POLARSSL_ERR_MPI_XXX error code
+ *
+ * \note Call this function with *slen = 0 to obtain the
+ * minimum required buffer size in *slen.
+ */
+int mpi_write_string( mpi *X, int radix, char *s, int *slen );
+
+/**
+ * \brief Read X from an opened file
+ *
+ * \param X destination mpi
+ * \param radix input numeric base
+ * \param fin input file handle
+ *
+ * \return 0 if successful, or an POLARSSL_ERR_MPI_XXX error code
+ */
+int mpi_read_file( mpi *X, int radix, FILE *fin );
+
+/**
+ * \brief Write X into an opened file, or stdout
+ *
+ * \param p prefix, can be NULL
+ * \param X source mpi
+ * \param radix output numeric base
+ * \param fout output file handle
+ *
+ * \return 0 if successful, or an POLARSSL_ERR_MPI_XXX error code
+ *
+ * \note Set fout == NULL to print X on the console.
+ */
+int mpi_write_file( char *p, mpi *X, int radix, FILE *fout );
+
+/**
+ * \brief Import X from unsigned binary data, big endian
+ *
+ * \param X destination mpi
+ * \param buf input buffer
+ * \param buflen input buffer size
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_read_binary( mpi *X, unsigned char *buf, int buflen );
+
+/**
+ * \brief Export X into unsigned binary data, big endian
+ *
+ * \param X source mpi
+ * \param buf output buffer
+ * \param buflen output buffer size
+ *
+ * \return 0 if successful,
+ * POLARSSL_ERR_MPI_BUFFER_TOO_SMALL if buf isn't large enough
+ *
+ * \note Call this function with *buflen = 0 to obtain the
+ * minimum required buffer size in *buflen.
+ */
+int mpi_write_binary( mpi *X, unsigned char *buf, int buflen );
+
+/**
+ * \brief Left-shift: X <<= count
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_shift_l( mpi *X, int count );
+
+/**
+ * \brief Right-shift: X >>= count
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_shift_r( mpi *X, int count );
+
+/**
+ * \brief Compare unsigned values
+ *
+ * \return 1 if |X| is greater than |Y|,
+ * -1 if |X| is lesser than |Y| or
+ * 0 if |X| is equal to |Y|
+ */
+int mpi_cmp_abs( mpi *X, mpi *Y );
+
+/**
+ * \brief Compare signed values
+ *
+ * \return 1 if X is greater than Y,
+ * -1 if X is lesser than Y or
+ * 0 if X is equal to Y
+ */
+int mpi_cmp_mpi( mpi *X, mpi *Y );
+
+/**
+ * \brief Compare signed values
+ *
+ * \return 1 if X is greater than z,
+ * -1 if X is lesser than z or
+ * 0 if X is equal to z
+ */
+int mpi_cmp_int( mpi *X, int z );
+
+/**
+ * \brief Unsigned addition: X = |A| + |B|
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_add_abs( mpi *X, mpi *A, mpi *B );
+
+/**
+ * \brief Unsigned substraction: X = |A| - |B|
+ *
+ * \return 0 if successful,
+ * POLARSSL_ERR_MPI_NEGATIVE_VALUE if B is greater than A
+ */
+int mpi_sub_abs( mpi *X, mpi *A, mpi *B );
+
+/**
+ * \brief Signed addition: X = A + B
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_add_mpi( mpi *X, mpi *A, mpi *B );
+
+/**
+ * \brief Signed substraction: X = A - B
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_sub_mpi( mpi *X, mpi *A, mpi *B );
+
+/**
+ * \brief Signed addition: X = A + b
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_add_int( mpi *X, mpi *A, int b );
+
+/**
+ * \brief Signed substraction: X = A - b
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_sub_int( mpi *X, mpi *A, int b );
+
+/**
+ * \brief Baseline multiplication: X = A * B
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_mul_mpi( mpi *X, mpi *A, mpi *B );
+
+/**
+ * \brief Baseline multiplication: X = A * b
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_mul_int( mpi *X, mpi *A, t_int b );
+
+/**
+ * \brief Division by mpi: A = Q * B + R
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed,
+ * POLARSSL_ERR_MPI_DIVISION_BY_ZERO if B == 0
+ *
+ * \note Either Q or R can be NULL.
+ */
+int mpi_div_mpi( mpi *Q, mpi *R, mpi *A, mpi *B );
+
+/**
+ * \brief Division by int: A = Q * b + R
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed,
+ * POLARSSL_ERR_MPI_DIVISION_BY_ZERO if b == 0
+ *
+ * \note Either Q or R can be NULL.
+ */
+int mpi_div_int( mpi *Q, mpi *R, mpi *A, int b );
+
+/**
+ * \brief Modulo: R = A mod B
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed,
+ * POLARSSL_ERR_MPI_DIVISION_BY_ZERO if B == 0
+ */
+int mpi_mod_mpi( mpi *R, mpi *A, mpi *B );
+
+/**
+ * \brief Modulo: r = A mod b
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed,
+ * POLARSSL_ERR_MPI_DIVISION_BY_ZERO if b == 0
+ */
+int mpi_mod_int( t_int *r, mpi *A, int b );
+
+/**
+ * \brief Sliding-window exponentiation: X = A^E mod N
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed,
+ * POLARSSL_ERR_MPI_BAD_INPUT_DATA if N is negative or even
+ *
+ * \note _RR is used to avoid re-computing R*R mod N across
+ * multiple calls, which speeds up things a bit. It can
+ * be set to NULL if the extra performance is unneeded.
+ */
+int mpi_exp_mod( mpi *X, mpi *A, mpi *E, mpi *N, mpi *_RR );
+
+/**
+ * \brief Greatest common divisor: G = gcd(A, B)
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed
+ */
+int mpi_gcd( mpi *G, mpi *A, mpi *B );
+
+/**
+ * \brief Modular inverse: X = A^-1 mod N
+ *
+ * \return 0 if successful,
+ * 1 if memory allocation failed,
+ * POLARSSL_ERR_MPI_BAD_INPUT_DATA if N is negative or nil
+ * POLARSSL_ERR_MPI_NOT_ACCEPTABLE if A has no inverse mod N
+ */
+int mpi_inv_mod( mpi *X, mpi *A, mpi *N );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* bignum.h */
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/bn_mul.h,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/**
+ * \file bn_mul.h
+ *
+ * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
+ *
+ * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+/*
+ * Multiply source vector [s] with b, add result
+ * to destination vector [d] and set carry c.
+ *
+ * Currently supports:
+ *
+ * . IA-32 (386+) . AMD64 / EM64T
+ * . IA-32 (SSE2) . Motorola 68000
+ * . PowerPC, 32-bit . MicroBlaze
+ * . PowerPC, 64-bit . TriCore
+ * . SPARC v8 . ARM v3+
+ * . Alpha . MIPS32
+ * . C, longlong . C, generic
+ */
+#ifndef POLARSSL_BN_MUL_H
+#define POLARSSL_BN_MUL_H
+
+#if defined(POLARSSL_HAVE_ASM)
+
+#if defined(__GNUC__)
+#if defined(__i386__)
+
+#define MULADDC_INIT \
+ asm( "movl %%ebx, %0 " : "=m" (t)); \
+ asm( "movl %0, %%esi " :: "m" (s)); \
+ asm( "movl %0, %%edi " :: "m" (d)); \
+ asm( "movl %0, %%ecx " :: "m" (c)); \
+ asm( "movl %0, %%ebx " :: "m" (b));
+
+#define MULADDC_CORE \
+ asm( "lodsl " ); \
+ asm( "mull %ebx " ); \
+ asm( "addl %ecx, %eax " ); \
+ asm( "adcl $0, %edx " ); \
+ asm( "addl (%edi), %eax " ); \
+ asm( "adcl $0, %edx " ); \
+ asm( "movl %edx, %ecx " ); \
+ asm( "stosl " );
+
+#if defined(POLARSSL_HAVE_SSE2)
+
+#define MULADDC_HUIT \
+ asm( "movd %ecx, %mm1 " ); \
+ asm( "movd %ebx, %mm0 " ); \
+ asm( "movd (%edi), %mm3 " ); \
+ asm( "paddq %mm3, %mm1 " ); \
+ asm( "movd (%esi), %mm2 " ); \
+ asm( "pmuludq %mm0, %mm2 " ); \
+ asm( "movd 4(%esi), %mm4 " ); \
+ asm( "pmuludq %mm0, %mm4 " ); \
+ asm( "movd 8(%esi), %mm6 " ); \
+ asm( "pmuludq %mm0, %mm6 " ); \
+ asm( "movd 12(%esi), %mm7 " ); \
+ asm( "pmuludq %mm0, %mm7 " ); \
+ asm( "paddq %mm2, %mm1 " ); \
+ asm( "movd 4(%edi), %mm3 " ); \
+ asm( "paddq %mm4, %mm3 " ); \
+ asm( "movd 8(%edi), %mm5 " ); \
+ asm( "paddq %mm6, %mm5 " ); \
+ asm( "movd 12(%edi), %mm4 " ); \
+ asm( "paddq %mm4, %mm7 " ); \
+ asm( "movd %mm1, (%edi) " ); \
+ asm( "movd 16(%esi), %mm2 " ); \
+ asm( "pmuludq %mm0, %mm2 " ); \
+ asm( "psrlq $32, %mm1 " ); \
+ asm( "movd 20(%esi), %mm4 " ); \
+ asm( "pmuludq %mm0, %mm4 " ); \
+ asm( "paddq %mm3, %mm1 " ); \
+ asm( "movd 24(%esi), %mm6 " ); \
+ asm( "pmuludq %mm0, %mm6 " ); \
+ asm( "movd %mm1, 4(%edi) " ); \
+ asm( "psrlq $32, %mm1 " ); \
+ asm( "movd 28(%esi), %mm3 " ); \
+ asm( "pmuludq %mm0, %mm3 " ); \
+ asm( "paddq %mm5, %mm1 " ); \
+ asm( "movd 16(%edi), %mm5 " ); \
+ asm( "paddq %mm5, %mm2 " ); \
+ asm( "movd %mm1, 8(%edi) " ); \
+ asm( "psrlq $32, %mm1 " ); \
+ asm( "paddq %mm7, %mm1 " ); \
+ asm( "movd 20(%edi), %mm5 " ); \
+ asm( "paddq %mm5, %mm4 " ); \
+ asm( "movd %mm1, 12(%edi) " ); \
+ asm( "psrlq $32, %mm1 " ); \
+ asm( "paddq %mm2, %mm1 " ); \
+ asm( "movd 24(%edi), %mm5 " ); \
+ asm( "paddq %mm5, %mm6 " ); \
+ asm( "movd %mm1, 16(%edi) " ); \
+ asm( "psrlq $32, %mm1 " ); \
+ asm( "paddq %mm4, %mm1 " ); \
+ asm( "movd 28(%edi), %mm5 " ); \
+ asm( "paddq %mm5, %mm3 " ); \
+ asm( "movd %mm1, 20(%edi) " ); \
+ asm( "psrlq $32, %mm1 " ); \
+ asm( "paddq %mm6, %mm1 " ); \
+ asm( "movd %mm1, 24(%edi) " ); \
+ asm( "psrlq $32, %mm1 " ); \
+ asm( "paddq %mm3, %mm1 " ); \
+ asm( "movd %mm1, 28(%edi) " ); \
+ asm( "addl $32, %edi " ); \
+ asm( "addl $32, %esi " ); \
+ asm( "psrlq $32, %mm1 " ); \
+ asm( "movd %mm1, %ecx " );
+
+#define MULADDC_STOP \
+ asm( "emms " ); \
+ asm( "movl %0, %%ebx " :: "m" (t)); \
+ asm( "movl %%ecx, %0 " : "=m" (c)); \
+ asm( "movl %%edi, %0 " : "=m" (d)); \
+ asm( "movl %%esi, %0 " : "=m" (s) :: \
+ "eax", "ecx", "edx", "esi", "edi" );
+
+#else
+
+#define MULADDC_STOP \
+ asm( "movl %0, %%ebx " :: "m" (t)); \
+ asm( "movl %%ecx, %0 " : "=m" (c)); \
+ asm( "movl %%edi, %0 " : "=m" (d)); \
+ asm( "movl %%esi, %0 " : "=m" (s) :: \
+ "eax", "ecx", "edx", "esi", "edi" );
+
+#endif /* SSE2 */
+#endif /* i386 */
+
+#if defined(__amd64__) || defined (__x86_64__)
+
+#define MULADDC_INIT \
+ asm( "movq %0, %%rsi " :: "m" (s)); \
+ asm( "movq %0, %%rdi " :: "m" (d)); \
+ asm( "movq %0, %%rcx " :: "m" (c)); \
+ asm( "movq %0, %%rbx " :: "m" (b)); \
+ asm( "xorq %r8, %r8 " );
+
+#define MULADDC_CORE \
+ asm( "movq (%rsi),%rax " ); \
+ asm( "mulq %rbx " ); \
+ asm( "addq $8, %rsi " ); \
+ asm( "addq %rcx, %rax " ); \
+ asm( "movq %r8, %rcx " ); \
+ asm( "adcq $0, %rdx " ); \
+ asm( "nop " ); \
+ asm( "addq %rax, (%rdi) " ); \
+ asm( "adcq %rdx, %rcx " ); \
+ asm( "addq $8, %rdi " );
+
+#define MULADDC_STOP \
+ asm( "movq %%rcx, %0 " : "=m" (c)); \
+ asm( "movq %%rdi, %0 " : "=m" (d)); \
+ asm( "movq %%rsi, %0 " : "=m" (s) :: \
+ "rax", "rcx", "rdx", "rbx", "rsi", "rdi", "r8" );
+
+#endif /* AMD64 */
+
+#if defined(__mc68020__) || defined(__mcpu32__)
+
+#define MULADDC_INIT \
+ asm( "movl %0, %%a2 " :: "m" (s)); \
+ asm( "movl %0, %%a3 " :: "m" (d)); \
+ asm( "movl %0, %%d3 " :: "m" (c)); \
+ asm( "movl %0, %%d2 " :: "m" (b)); \
+ asm( "moveq #0, %d0 " );
+
+#define MULADDC_CORE \
+ asm( "movel %a2@+, %d1 " ); \
+ asm( "mulul %d2, %d4:%d1 " ); \
+ asm( "addl %d3, %d1 " ); \
+ asm( "addxl %d0, %d4 " ); \
+ asm( "moveq #0, %d3 " ); \
+ asm( "addl %d1, %a3@+ " ); \
+ asm( "addxl %d4, %d3 " );
+
+#define MULADDC_STOP \
+ asm( "movl %%d3, %0 " : "=m" (c)); \
+ asm( "movl %%a3, %0 " : "=m" (d)); \
+ asm( "movl %%a2, %0 " : "=m" (s) :: \
+ "d0", "d1", "d2", "d3", "d4", "a2", "a3" );
+
+#define MULADDC_HUIT \
+ asm( "movel %a2@+, %d1 " ); \
+ asm( "mulul %d2, %d4:%d1 " ); \
+ asm( "addxl %d3, %d1 " ); \
+ asm( "addxl %d0, %d4 " ); \
+ asm( "addl %d1, %a3@+ " ); \
+ asm( "movel %a2@+, %d1 " ); \
+ asm( "mulul %d2, %d3:%d1 " ); \
+ asm( "addxl %d4, %d1 " ); \
+ asm( "addxl %d0, %d3 " ); \
+ asm( "addl %d1, %a3@+ " ); \
+ asm( "movel %a2@+, %d1 " ); \
+ asm( "mulul %d2, %d4:%d1 " ); \
+ asm( "addxl %d3, %d1 " ); \
+ asm( "addxl %d0, %d4 " ); \
+ asm( "addl %d1, %a3@+ " ); \
+ asm( "movel %a2@+, %d1 " ); \
+ asm( "mulul %d2, %d3:%d1 " ); \
+ asm( "addxl %d4, %d1 " ); \
+ asm( "addxl %d0, %d3 " ); \
+ asm( "addl %d1, %a3@+ " ); \
+ asm( "movel %a2@+, %d1 " ); \
+ asm( "mulul %d2, %d4:%d1 " ); \
+ asm( "addxl %d3, %d1 " ); \
+ asm( "addxl %d0, %d4 " ); \
+ asm( "addl %d1, %a3@+ " ); \
+ asm( "movel %a2@+, %d1 " ); \
+ asm( "mulul %d2, %d3:%d1 " ); \
+ asm( "addxl %d4, %d1 " ); \
+ asm( "addxl %d0, %d3 " ); \
+ asm( "addl %d1, %a3@+ " ); \
+ asm( "movel %a2@+, %d1 " ); \
+ asm( "mulul %d2, %d4:%d1 " ); \
+ asm( "addxl %d3, %d1 " ); \
+ asm( "addxl %d0, %d4 " ); \
+ asm( "addl %d1, %a3@+ " ); \
+ asm( "movel %a2@+, %d1 " ); \
+ asm( "mulul %d2, %d3:%d1 " ); \
+ asm( "addxl %d4, %d1 " ); \
+ asm( "addxl %d0, %d3 " ); \
+ asm( "addl %d1, %a3@+ " ); \
+ asm( "addxl %d0, %d3 " );
+
+#endif /* MC68000 */
+
+#if defined(__powerpc__) || defined(__ppc__)
+#if defined(__powerpc64__) || defined(__ppc64__)
+
+#if defined(__MACH__) && defined(__APPLE__)
+
+#define MULADDC_INIT \
+ asm( "ld r3, %0 " :: "m" (s)); \
+ asm( "ld r4, %0 " :: "m" (d)); \
+ asm( "ld r5, %0 " :: "m" (c)); \
+ asm( "ld r6, %0 " :: "m" (b)); \
+ asm( "addi r3, r3, -8 " ); \
+ asm( "addi r4, r4, -8 " ); \
+ asm( "addic r5, r5, 0 " );
+
+#define MULADDC_CORE \
+ asm( "ldu r7, 8(r3) " ); \
+ asm( "mulld r8, r7, r6 " ); \
+ asm( "mulhdu r9, r7, r6 " ); \
+ asm( "adde r8, r8, r5 " ); \
+ asm( "ld r7, 8(r4) " ); \
+ asm( "addze r5, r9 " ); \
+ asm( "addc r8, r8, r7 " ); \
+ asm( "stdu r8, 8(r4) " );
+
+#define MULADDC_STOP \
+ asm( "addze r5, r5 " ); \
+ asm( "addi r4, r4, 8 " ); \
+ asm( "addi r3, r3, 8 " ); \
+ asm( "std r5, %0 " : "=m" (c)); \
+ asm( "std r4, %0 " : "=m" (d)); \
+ asm( "std r3, %0 " : "=m" (s) :: \
+ "r3", "r4", "r5", "r6", "r7", "r8", "r9" );
+
+#else
+
+#define MULADDC_INIT \
+ asm( "ld %%r3, %0 " :: "m" (s)); \
+ asm( "ld %%r4, %0 " :: "m" (d)); \
+ asm( "ld %%r5, %0 " :: "m" (c)); \
+ asm( "ld %%r6, %0 " :: "m" (b)); \
+ asm( "addi %r3, %r3, -8 " ); \
+ asm( "addi %r4, %r4, -8 " ); \
+ asm( "addic %r5, %r5, 0 " );
+
+#define MULADDC_CORE \
+ asm( "ldu %r7, 8(%r3) " ); \
+ asm( "mulld %r8, %r7, %r6 " ); \
+ asm( "mulhdu %r9, %r7, %r6 " ); \
+ asm( "adde %r8, %r8, %r5 " ); \
+ asm( "ld %r7, 8(%r4) " ); \
+ asm( "addze %r5, %r9 " ); \
+ asm( "addc %r8, %r8, %r7 " ); \
+ asm( "stdu %r8, 8(%r4) " );
+
+#define MULADDC_STOP \
+ asm( "addze %r5, %r5 " ); \
+ asm( "addi %r4, %r4, 8 " ); \
+ asm( "addi %r3, %r3, 8 " ); \
+ asm( "std %%r5, %0 " : "=m" (c)); \
+ asm( "std %%r4, %0 " : "=m" (d)); \
+ asm( "std %%r3, %0 " : "=m" (s) :: \
+ "r3", "r4", "r5", "r6", "r7", "r8", "r9" );
+
+#endif
+
+#else /* PPC32 */
+
+#if defined(__MACH__) && defined(__APPLE__)
+
+#define MULADDC_INIT \
+ asm( "lwz r3, %0 " :: "m" (s)); \
+ asm( "lwz r4, %0 " :: "m" (d)); \
+ asm( "lwz r5, %0 " :: "m" (c)); \
+ asm( "lwz r6, %0 " :: "m" (b)); \
+ asm( "addi r3, r3, -4 " ); \
+ asm( "addi r4, r4, -4 " ); \
+ asm( "addic r5, r5, 0 " );
+
+#define MULADDC_CORE \
+ asm( "lwzu r7, 4(r3) " ); \
+ asm( "mullw r8, r7, r6 " ); \
+ asm( "mulhwu r9, r7, r6 " ); \
+ asm( "adde r8, r8, r5 " ); \
+ asm( "lwz r7, 4(r4) " ); \
+ asm( "addze r5, r9 " ); \
+ asm( "addc r8, r8, r7 " ); \
+ asm( "stwu r8, 4(r4) " );
+
+#define MULADDC_STOP \
+ asm( "addze r5, r5 " ); \
+ asm( "addi r4, r4, 4 " ); \
+ asm( "addi r3, r3, 4 " ); \
+ asm( "stw r5, %0 " : "=m" (c)); \
+ asm( "stw r4, %0 " : "=m" (d)); \
+ asm( "stw r3, %0 " : "=m" (s) :: \
+ "r3", "r4", "r5", "r6", "r7", "r8", "r9" );
+
+#else
+
+#define MULADDC_INIT \
+ asm( "lwz %%r3, %0 " :: "m" (s)); \
+ asm( "lwz %%r4, %0 " :: "m" (d)); \
+ asm( "lwz %%r5, %0 " :: "m" (c)); \
+ asm( "lwz %%r6, %0 " :: "m" (b)); \
+ asm( "addi %r3, %r3, -4 " ); \
+ asm( "addi %r4, %r4, -4 " ); \
+ asm( "addic %r5, %r5, 0 " );
+
+#define MULADDC_CORE \
+ asm( "lwzu %r7, 4(%r3) " ); \
+ asm( "mullw %r8, %r7, %r6 " ); \
+ asm( "mulhwu %r9, %r7, %r6 " ); \
+ asm( "adde %r8, %r8, %r5 " ); \
+ asm( "lwz %r7, 4(%r4) " ); \
+ asm( "addze %r5, %r9 " ); \
+ asm( "addc %r8, %r8, %r7 " ); \
+ asm( "stwu %r8, 4(%r4) " );
+
+#define MULADDC_STOP \
+ asm( "addze %r5, %r5 " ); \
+ asm( "addi %r4, %r4, 4 " ); \
+ asm( "addi %r3, %r3, 4 " ); \
+ asm( "stw %%r5, %0 " : "=m" (c)); \
+ asm( "stw %%r4, %0 " : "=m" (d)); \
+ asm( "stw %%r3, %0 " : "=m" (s) :: \
+ "r3", "r4", "r5", "r6", "r7", "r8", "r9" );
+
+#endif
+
+#endif /* PPC32 */
+#endif /* PPC64 */
+
+#if defined(__sparc__)
+
+#define MULADDC_INIT \
+ asm( "ld %0, %%o0 " :: "m" (s)); \
+ asm( "ld %0, %%o1 " :: "m" (d)); \
+ asm( "ld %0, %%o2 " :: "m" (c)); \
+ asm( "ld %0, %%o3 " :: "m" (b));
+
+#define MULADDC_CORE \
+ asm( "ld [%o0], %o4 " ); \
+ asm( "inc 4, %o0 " ); \
+ asm( "ld [%o1], %o5 " ); \
+ asm( "umul %o3, %o4, %o4 " ); \
+ asm( "addcc %o4, %o2, %o4 " ); \
+ asm( "rd %y, %g1 " ); \
+ asm( "addx %g1, 0, %g1 " ); \
+ asm( "addcc %o4, %o5, %o4 " ); \
+ asm( "st %o4, [%o1] " ); \
+ asm( "addx %g1, 0, %o2 " ); \
+ asm( "inc 4, %o1 " );
+
+#define MULADDC_STOP \
+ asm( "st %%o2, %0 " : "=m" (c)); \
+ asm( "st %%o1, %0 " : "=m" (d)); \
+ asm( "st %%o0, %0 " : "=m" (s) :: \
+ "g1", "o0", "o1", "o2", "o3", "o4", "o5" );
+
+#endif /* SPARCv8 */
+
+#if defined(__microblaze__) || defined(microblaze)
+
+#define MULADDC_INIT \
+ asm( "lwi r3, %0 " :: "m" (s)); \
+ asm( "lwi r4, %0 " :: "m" (d)); \
+ asm( "lwi r5, %0 " :: "m" (c)); \
+ asm( "lwi r6, %0 " :: "m" (b)); \
+ asm( "andi r7, r6, 0xffff" ); \
+ asm( "bsrli r6, r6, 16 " );
+
+#define MULADDC_CORE \
+ asm( "lhui r8, r3, 0 " ); \
+ asm( "addi r3, r3, 2 " ); \
+ asm( "lhui r9, r3, 0 " ); \
+ asm( "addi r3, r3, 2 " ); \
+ asm( "mul r10, r9, r6 " ); \
+ asm( "mul r11, r8, r7 " ); \
+ asm( "mul r12, r9, r7 " ); \
+ asm( "mul r13, r8, r6 " ); \
+ asm( "bsrli r8, r10, 16 " ); \
+ asm( "bsrli r9, r11, 16 " ); \
+ asm( "add r13, r13, r8 " ); \
+ asm( "add r13, r13, r9 " ); \
+ asm( "bslli r10, r10, 16 " ); \
+ asm( "bslli r11, r11, 16 " ); \
+ asm( "add r12, r12, r10 " ); \
+ asm( "addc r13, r13, r0 " ); \
+ asm( "add r12, r12, r11 " ); \
+ asm( "addc r13, r13, r0 " ); \
+ asm( "lwi r10, r4, 0 " ); \
+ asm( "add r12, r12, r10 " ); \
+ asm( "addc r13, r13, r0 " ); \
+ asm( "add r12, r12, r5 " ); \
+ asm( "addc r5, r13, r0 " ); \
+ asm( "swi r12, r4, 0 " ); \
+ asm( "addi r4, r4, 4 " );
+
+#define MULADDC_STOP \
+ asm( "swi r5, %0 " : "=m" (c)); \
+ asm( "swi r4, %0 " : "=m" (d)); \
+ asm( "swi r3, %0 " : "=m" (s) :: \
+ "r3", "r4" , "r5" , "r6" , "r7" , "r8" , \
+ "r9", "r10", "r11", "r12", "r13" );
+
+#endif /* MicroBlaze */
+
+#if defined(__tricore__)
+
+#define MULADDC_INIT \
+ asm( "ld.a %%a2, %0 " :: "m" (s)); \
+ asm( "ld.a %%a3, %0 " :: "m" (d)); \
+ asm( "ld.w %%d4, %0 " :: "m" (c)); \
+ asm( "ld.w %%d1, %0 " :: "m" (b)); \
+ asm( "xor %d5, %d5 " );
+
+#define MULADDC_CORE \
+ asm( "ld.w %d0, [%a2+] " ); \
+ asm( "madd.u %e2, %e4, %d0, %d1 " ); \
+ asm( "ld.w %d0, [%a3] " ); \
+ asm( "addx %d2, %d2, %d0 " ); \
+ asm( "addc %d3, %d3, 0 " ); \
+ asm( "mov %d4, %d3 " ); \
+ asm( "st.w [%a3+], %d2 " );
+
+#define MULADDC_STOP \
+ asm( "st.w %0, %%d4 " : "=m" (c)); \
+ asm( "st.a %0, %%a3 " : "=m" (d)); \
+ asm( "st.a %0, %%a2 " : "=m" (s) :: \
+ "d0", "d1", "e2", "d4", "a2", "a3" );
+
+#endif /* TriCore */
+
+#if defined(__arm__)
+
+#define MULADDC_INIT \
+ asm( "ldr r0, %0 " :: "m" (s)); \
+ asm( "ldr r1, %0 " :: "m" (d)); \
+ asm( "ldr r2, %0 " :: "m" (c)); \
+ asm( "ldr r3, %0 " :: "m" (b));
+
+#define MULADDC_CORE \
+ asm( "ldr r4, [r0], #4 " ); \
+ asm( "mov r5, #0 " ); \
+ asm( "ldr r6, [r1] " ); \
+ asm( "umlal r2, r5, r3, r4 " ); \
+ asm( "adds r7, r6, r2 " ); \
+ asm( "adc r2, r5, #0 " ); \
+ asm( "str r7, [r1], #4 " );
+
+#define MULADDC_STOP \
+ asm( "str r2, %0 " : "=m" (c)); \
+ asm( "str r1, %0 " : "=m" (d)); \
+ asm( "str r0, %0 " : "=m" (s) :: \
+ "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7" );
+
+#endif /* ARMv3 */
+
+#if defined(__alpha__)
+
+#define MULADDC_INIT \
+ asm( "ldq $1, %0 " :: "m" (s)); \
+ asm( "ldq $2, %0 " :: "m" (d)); \
+ asm( "ldq $3, %0 " :: "m" (c)); \
+ asm( "ldq $4, %0 " :: "m" (b));
+
+#define MULADDC_CORE \
+ asm( "ldq $6, 0($1) " ); \
+ asm( "addq $1, 8, $1 " ); \
+ asm( "mulq $6, $4, $7 " ); \
+ asm( "umulh $6, $4, $6 " ); \
+ asm( "addq $7, $3, $7 " ); \
+ asm( "cmpult $7, $3, $3 " ); \
+ asm( "ldq $5, 0($2) " ); \
+ asm( "addq $7, $5, $7 " ); \
+ asm( "cmpult $7, $5, $5 " ); \
+ asm( "stq $7, 0($2) " ); \
+ asm( "addq $2, 8, $2 " ); \
+ asm( "addq $6, $3, $3 " ); \
+ asm( "addq $5, $3, $3 " );
+
+#define MULADDC_STOP \
+ asm( "stq $3, %0 " : "=m" (c)); \
+ asm( "stq $2, %0 " : "=m" (d)); \
+ asm( "stq $1, %0 " : "=m" (s) :: \
+ "$1", "$2", "$3", "$4", "$5", "$6", "$7" );
+
+#endif /* Alpha */
+
+#if defined(__mips__)
+
+#define MULADDC_INIT \
+ asm( "lw $10, %0 " :: "m" (s)); \
+ asm( "lw $11, %0 " :: "m" (d)); \
+ asm( "lw $12, %0 " :: "m" (c)); \
+ asm( "lw $13, %0 " :: "m" (b));
+
+#define MULADDC_CORE \
+ asm( "lw $14, 0($10) " ); \
+ asm( "multu $13, $14 " ); \
+ asm( "addi $10, $10, 4 " ); \
+ asm( "mflo $14 " ); \
+ asm( "mfhi $9 " ); \
+ asm( "addu $14, $12, $14 " ); \
+ asm( "lw $15, 0($11) " ); \
+ asm( "sltu $12, $14, $12 " ); \
+ asm( "addu $15, $14, $15 " ); \
+ asm( "sltu $14, $15, $14 " ); \
+ asm( "addu $12, $12, $9 " ); \
+ asm( "sw $15, 0($11) " ); \
+ asm( "addu $12, $12, $14 " ); \
+ asm( "addi $11, $11, 4 " );
+
+#define MULADDC_STOP \
+ asm( "sw $12, %0 " : "=m" (c)); \
+ asm( "sw $11, %0 " : "=m" (d)); \
+ asm( "sw $10, %0 " : "=m" (s) :: \
+ "$9", "$10", "$11", "$12", "$13", "$14", "$15" );
+
+#endif /* MIPS */
+#endif /* GNUC */
+
+#if (defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)
+
+#define MULADDC_INIT \
+ __asm mov esi, s \
+ __asm mov edi, d \
+ __asm mov ecx, c \
+ __asm mov ebx, b
+
+#define MULADDC_CORE \
+ __asm lodsd \
+ __asm mul ebx \
+ __asm add eax, ecx \
+ __asm adc edx, 0 \
+ __asm add eax, [edi] \
+ __asm adc edx, 0 \
+ __asm mov ecx, edx \
+ __asm stosd
+
+#if defined(POLARSSL_HAVE_SSE2)
+
+#define EMIT __asm _emit
+
+#define MULADDC_HUIT \
+ EMIT 0x0F EMIT 0x6E EMIT 0xC9 \
+ EMIT 0x0F EMIT 0x6E EMIT 0xC3 \
+ EMIT 0x0F EMIT 0x6E EMIT 0x1F \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCB \
+ EMIT 0x0F EMIT 0x6E EMIT 0x16 \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xD0 \
+ EMIT 0x0F EMIT 0x6E EMIT 0x66 EMIT 0x04 \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xE0 \
+ EMIT 0x0F EMIT 0x6E EMIT 0x76 EMIT 0x08 \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xF0 \
+ EMIT 0x0F EMIT 0x6E EMIT 0x7E EMIT 0x0C \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xF8 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCA \
+ EMIT 0x0F EMIT 0x6E EMIT 0x5F EMIT 0x04 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xDC \
+ EMIT 0x0F EMIT 0x6E EMIT 0x6F EMIT 0x08 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xEE \
+ EMIT 0x0F EMIT 0x6E EMIT 0x67 EMIT 0x0C \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xFC \
+ EMIT 0x0F EMIT 0x7E EMIT 0x0F \
+ EMIT 0x0F EMIT 0x6E EMIT 0x56 EMIT 0x10 \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xD0 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0x6E EMIT 0x66 EMIT 0x14 \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xE0 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCB \
+ EMIT 0x0F EMIT 0x6E EMIT 0x76 EMIT 0x18 \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xF0 \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x04 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0x6E EMIT 0x5E EMIT 0x1C \
+ EMIT 0x0F EMIT 0xF4 EMIT 0xD8 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCD \
+ EMIT 0x0F EMIT 0x6E EMIT 0x6F EMIT 0x10 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xD5 \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x08 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCF \
+ EMIT 0x0F EMIT 0x6E EMIT 0x6F EMIT 0x14 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xE5 \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x0C \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCA \
+ EMIT 0x0F EMIT 0x6E EMIT 0x6F EMIT 0x18 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xF5 \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x10 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCC \
+ EMIT 0x0F EMIT 0x6E EMIT 0x6F EMIT 0x1C \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xDD \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x14 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCE \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x18 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0xD4 EMIT 0xCB \
+ EMIT 0x0F EMIT 0x7E EMIT 0x4F EMIT 0x1C \
+ EMIT 0x83 EMIT 0xC7 EMIT 0x20 \
+ EMIT 0x83 EMIT 0xC6 EMIT 0x20 \
+ EMIT 0x0F EMIT 0x73 EMIT 0xD1 EMIT 0x20 \
+ EMIT 0x0F EMIT 0x7E EMIT 0xC9
+
+#define MULADDC_STOP \
+ EMIT 0x0F EMIT 0x77 \
+ __asm mov c, ecx \
+ __asm mov d, edi \
+ __asm mov s, esi \
+
+#else
+
+#define MULADDC_STOP \
+ __asm mov c, ecx \
+ __asm mov d, edi \
+ __asm mov s, esi \
+
+#endif /* SSE2 */
+#endif /* MSVC */
+
+#endif /* POLARSSL_HAVE_ASM */
+
+#if !defined(MULADDC_CORE)
+#if defined(POLARSSL_HAVE_LONGLONG)
+
+#define MULADDC_INIT \
+{ \
+ t_dbl r; \
+ t_int r0, r1;
+
+#define MULADDC_CORE \
+ r = *(s++) * (t_dbl) b; \
+ r0 = r; \
+ r1 = r >> biL; \
+ r0 += c; r1 += (r0 < c); \
+ r0 += *d; r1 += (r0 < *d); \
+ c = r1; *(d++) = r0;
+
+#define MULADDC_STOP \
+}
+
+#else
+#define MULADDC_INIT \
+{ \
+ t_int s0, s1, b0, b1; \
+ t_int r0, r1, rx, ry; \
+ b0 = ( b << biH ) >> biH; \
+ b1 = ( b >> biH );
+
+#define MULADDC_CORE \
+ s0 = ( *s << biH ) >> biH; \
+ s1 = ( *s >> biH ); s++; \
+ rx = s0 * b1; r0 = s0 * b0; \
+ ry = s1 * b0; r1 = s1 * b1; \
+ r1 += ( rx >> biH ); \
+ r1 += ( ry >> biH ); \
+ rx <<= biH; ry <<= biH; \
+ r0 += rx; r1 += (r0 < rx); \
+ r0 += ry; r1 += (r0 < ry); \
+ r0 += c; r1 += (r0 < c); \
+ r0 += *d; r1 += (r0 < *d); \
+ c = r1; *(d++) = r0;
+
+#define MULADDC_STOP \
+}
+
+#endif /* C (generic) */
+#endif /* C (longlong) */
+
+#endif /* bn_mul.h */
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/pdkim.c,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/* pdkim.c */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <strings.h>
+#include <ctype.h>
+#include <unistd.h>
+#include "pdkim.h"
+
+
+/* -------------------------------------------------------------------------- */
+/* A bunch of list constants */
+char *pdkim_querymethods[] = {
+ "dns/txt"
+};
+char *pdkim_algos[] = {
+ "rsa-sha256",
+ "rsa-sha1"
+};
+char *pdkim_canons[] = {
+ "simple",
+ "relaxed"
+};
+
+
+/* -------------------------------------------------------------------------- */
+/* Various debugging functions */
+#ifdef PDKIM_DEBUG
+void pdkim_quoteprint(FILE *stream, char *data, int len, int lf) {
+ int i;
+ unsigned char *p = (unsigned char *)data;
+
+ for (i=0;i<len;i++) {
+ int c = p[i];
+ switch (c) {
+ case ' ' : fprintf(stream,"{SP}"); break;
+ case '\t': fprintf(stream,"{TB}"); break;
+ case '\r': fprintf(stream,"{CR}"); break;
+ case '\n': fprintf(stream,"{LF}"); break;
+ case '{' : fprintf(stream,"{BO}"); break;
+ case '}' : fprintf(stream,"{BC}"); break;
+ default:
+ if ( (c < 32) || (c > 127) )
+ fprintf(stream,"{%02x}",c);
+ else
+ fputc(c,stream);
+ break;
+ }
+ }
+ if (lf)
+ fputc('\n',stream);
+}
+#endif
+
+
+/* -------------------------------------------------------------------------- */
+/* Simple string list implementation for convinience */
+pdkim_stringlist *pdkim_append_stringlist(pdkim_stringlist *base, char *str) {
+ pdkim_stringlist *new_entry = malloc(sizeof(pdkim_stringlist));
+ if (new_entry == NULL) return NULL;
+ memset(new_entry,0,sizeof(pdkim_stringlist));
+ new_entry->value = malloc(strlen(str)+1);
+ if (new_entry->value == NULL) return NULL;
+ strcpy(new_entry->value,str);
+ if (base != NULL) {
+ pdkim_stringlist *last = base;
+ while (last->next != NULL) { last = last->next; };
+ last->next = new_entry;
+ return base;
+ }
+ else return new_entry;
+};
+
+
+/* -------------------------------------------------------------------------- */
+/* A small "growing string" implementation to escape malloc/realloc hell */
+pdkim_str *pdkim_strnew (char *cstr) {
+ unsigned int len = cstr?strlen(cstr):0;
+ pdkim_str *p = malloc(sizeof(pdkim_str));
+ if (p == NULL) return NULL;
+ memset(p,0,sizeof(pdkim_str));
+ p->str = malloc(len+1);
+ if (p->str == NULL) {
+ free(p);
+ return NULL;
+ }
+ p->allocated=(len+1);
+ p->len=len;
+ if (cstr) strcpy(p->str,cstr);
+ return p;
+};
+char *pdkim_strcat(pdkim_str *str, char *cstr) {
+ return pdkim_strncat(str, cstr, strlen(cstr));
+};
+char *pdkim_strncat(pdkim_str *str, char *data, int len) {
+ if ((str->allocated - str->len) < (len+1)) {
+ /* Extend the buffer */
+ int num_frags = ((len+1)/PDKIM_STR_ALLOC_FRAG)+1;
+ char *n = realloc(str->str,
+ (str->allocated+(num_frags*PDKIM_STR_ALLOC_FRAG)));
+ if (n == NULL) return NULL;
+ str->str = n;
+ str->allocated += (num_frags*PDKIM_STR_ALLOC_FRAG);
+ }
+ strncpy(&(str->str[str->len]),data,len);
+ str->len+=len;
+ str->str[str->len] = '\0';
+ return str->str;
+};
+char *pdkim_numcat(pdkim_str *str, unsigned long num) {
+ char minibuf[20];
+ snprintf(minibuf,20,"%lu",num);
+ return pdkim_strcat(str,minibuf);
+};
+void pdkim_strfree(pdkim_str *str) {
+ if (str == NULL) return;
+ if (str->str != NULL) free(str->str);
+ free(str);
+};
+
+
+/* -------------------------------------------------------------------------- */
+/* Matches the name of the passed raw "header" against
+ the passed colon-separated "list". Case-insensitive.
+ Returns '0' for a match. */
+int header_name_match(char *header,
+ char *list) {
+ char *hname;
+ char *lcopy;
+ char *p;
+ char *q;
+ int rc = PDKIM_FAIL;
+ char *hcolon = strchr(header,':');
+ if (hcolon == NULL) return rc; /* This isn't a header */
+ hname = malloc((hcolon-header)+1);
+ if (hname == NULL) return PDKIM_ERR_OOM;
+ memset(hname,0,(hcolon-header)+1);
+ strncpy(hname,header,(hcolon-header));
+ lcopy = malloc(strlen(list)+1);
+ if (lcopy == NULL) {
+ free(hname);
+ return PDKIM_ERR_OOM;
+ }
+ strcpy(lcopy,list);
+ p = lcopy;
+ q = strchr(p,':');
+ while (q != NULL) {
+ *q = '\0';
+ if (strcasecmp(p,hname) == 0) {
+ rc = PDKIM_OK;
+ goto BAIL;
+ }
+ p = q+1;
+ q = strchr(p,':');
+ }
+ if (strcasecmp(p,hname) == 0) rc = PDKIM_OK;
+ BAIL:
+ free(hname);
+ free(lcopy);
+ return rc;
+}
+
+
+/* -------------------------------------------------------------------------- */
+/* Performs "relaxed" canonicalization of a header. The returned pointer needs
+ to be free()d. */
+char *pdkim_relax_header (char *header, int crlf) {
+ int past_field_name = 0;
+ int seen_wsp = 0;
+ char *p = header;
+ char *q;
+ char *relaxed = malloc(strlen(header));
+ if (relaxed == NULL) return NULL;
+ q = relaxed;
+ while (*p != '\0') {
+ int c = *p;
+ /* Ignore CR & LF */
+ if ( (c == '\r') || (c == '\n') ) {
+ p++;
+ continue;
+ }
+ if ( (c == '\t') || (c == ' ') ) {
+ c = ' '; /* Turns WSP into SP */
+ if (seen_wsp) {
+ p++;
+ continue;
+ }
+ else seen_wsp = 1;
+ }
+ else {
+ if ( (!past_field_name) && (c == ':') ) {
+ if (seen_wsp) q--; /* This removes WSP before the colon */
+ seen_wsp = 1; /* This removes WSP after the colon */
+ past_field_name = 1;
+ }
+ else seen_wsp = 0;
+ }
+ /* Lowercase header name */
+ if (!past_field_name) c = tolower(c);
+ *q = c;
+ p++;
+ q++;
+ }
+ *q = '\0';
+ if (crlf) strcat(relaxed,"\r\n");
+ return relaxed;
+};
+
+
+/* -------------------------------------------------------------------------- */
+int pdkim_update_bodyhash(pdkim_ctx *ctx, char *data, int len) {
+ pdkim_signature *sig = ctx->sig;
+ /* Cache relaxed version of data */
+ char *relaxed_data = NULL;
+ int relaxed_len = 0;
+
+ /* Traverse all signatures, updating their hashes. */
+ while (sig != NULL) {
+ /* Defaults to simple canon (no further treatment necessary) */
+ char *canon_data = data;
+ int canon_len = len;
+
+ if (sig->canon_body == PDKIM_CANON_RELAXED) {
+ /* Relax the line if not done already */
+ if (relaxed_data == NULL) {
+ int seen_wsp = 0;
+ char *p = data;
+ int q = 0;
+ relaxed_data = malloc(len);
+ if (relaxed_data == NULL) return PDKIM_ERR_OOM;
+ while (*p != '\0') {
+ char c = *p;
+ if ( (c == '\t') || (c == ' ') ) {
+ c = ' '; /* Turns WSP into SP */
+ if (seen_wsp) {
+ p++;
+ continue;
+ }
+ else seen_wsp = 1;
+ }
+ else seen_wsp = 0;
+ relaxed_data[q++] = c;
+ p++;
+ }
+ relaxed_data[q] = '\0';
+ relaxed_len = q;
+ }
+ canon_data = relaxed_data;
+ canon_len = relaxed_len;
+ }
+
+ /* Make sure we don't exceed the to-be-signed body length */
+ if (sig->bodylength &&
+ ((sig->signed_body_bytes+(unsigned long)canon_len) > sig->bodylength))
+ canon_len = (sig->bodylength - sig->signed_body_bytes);
+
+ if (canon_len > 0) {
+ if (sig->algo == PDKIM_ALGO_RSA_SHA1)
+ sha1_update(&(sig->sha1_body),(unsigned char *)canon_data,canon_len);
+ else
+ sha2_update(&(sig->sha2_body),(unsigned char *)canon_data,canon_len);
+ sig->signed_body_bytes += canon_len;
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream!=NULL)
+ pdkim_quoteprint(ctx->debug_stream,canon_data,canon_len,0);
+#endif
+ }
+
+ sig = sig->next;
+ }
+
+ if (relaxed_data != NULL) free(relaxed_data);
+ return PDKIM_OK;
+};
+
+
+/* -------------------------------------------------------------------------- */
+int pdkim_finish_bodyhash(pdkim_ctx *ctx) {
+ pdkim_signature *sig = ctx->sig;
+
+ /* Traverse all signatures */
+ while (sig != NULL) {
+
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream)
+ fprintf(ctx->debug_stream, "PDKIM [%s] Body bytes hashed: %lu\n",
+ sig->domain, sig->signed_body_bytes);
+#endif
+
+ /* Finish hashes */
+ unsigned char bh[32]; /* SHA-256 = 32 Bytes, SHA-1 = 20 Bytes */
+ if (sig->algo == PDKIM_ALGO_RSA_SHA1)
+ sha1_finish(&(sig->sha1_body),bh);
+ else
+ sha2_finish(&(sig->sha2_body),bh);
+
+ /* SIGNING -------------------------------------------------------------- */
+ if (ctx->mode == PDKIM_MODE_SIGN) {
+
+ /* Build base64 version of body hash and place it in the sig struct */
+ int slen = (sig->algo == PDKIM_ALGO_RSA_SHA1)?20:32;
+ int dlen = 0;
+ base64_encode(NULL,&dlen,bh,slen); /* Puts needed length in dlen */
+ sig->bodyhash = malloc(dlen+1);
+ if (sig->bodyhash == NULL) return PDKIM_ERR_OOM;
+ if (base64_encode((unsigned char *)sig->bodyhash,&dlen,bh,slen) == 0) {
+ sig->bodyhash[dlen] = '\0';
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream)
+ fprintf(ctx->debug_stream, "PDKIM [%s] body hash: %s\n",
+ sig->domain, sig->bodyhash);
+#endif
+ return PDKIM_OK;
+ }
+
+ /* If bodylength limit is set, and we have received less bytes
+ than the requested amount, effectively remove the limit tag. */
+ if (sig->signed_body_bytes < sig->bodylength) sig->bodylength = 0;
+ }
+ /* VERIFICATION --------------------------------------------------------- */
+ else {
+
+
+ }
+
+
+ sig = sig->next;
+ }
+
+ return PDKIM_OK;
+};
+
+
+
+/* -------------------------------------------------------------------------- */
+/* Callback from pdkim_feed below for processing complete body lines */
+int pdkim_bodyline_complete(pdkim_ctx *ctx) {
+ char *p = ctx->linebuf;
+ int n = ctx->linebuf_offset;
+
+ /* Ignore extra data if we've seen the end-of-data marker */
+ if (ctx->seen_eod) goto BAIL;
+
+ /* We've always got one extra byte to stuff a zero ... */
+ ctx->linebuf[(ctx->linebuf_offset)] = '\0';
+
+ if (ctx->input_mode == PDKIM_INPUT_SMTP) {
+ /* Terminate on EOD marker */
+ if (memcmp(p,".\r\n",3) == 0) {
+ ctx->seen_eod = 1;
+ goto BAIL;
+ }
+ /* Unstuff dots */
+ if (memcmp(p,"..",2) == 0) {
+ p++;
+ n--;
+ }
+ }
+
+ /* Empty lines need to be buffered until we find a non-empty line */
+ if (memcmp(p,"\r\n",2) == 0) {
+ ctx->num_buffered_crlf++;
+ goto BAIL;
+ }
+
+ /* At this point, we have a non-empty line, so release the buffered ones. */
+ while (ctx->num_buffered_crlf) {
+ pdkim_update_bodyhash(ctx,"\r\n",2);
+ ctx->num_buffered_crlf--;
+ }
+
+ pdkim_update_bodyhash(ctx,p,n);
+
+ BAIL:
+ ctx->linebuf_offset = 0;
+ return PDKIM_OK;
+}
+
+
+/* -------------------------------------------------------------------------- */
+/* Callback from pdkim_feed below for processing complete headers */
+int pdkim_header_complete(pdkim_ctx *ctx) {
+ pdkim_signature *sig = ctx->sig;
+
+ /* Special case: The last header can have an extra \r appended */
+ if ( (ctx->cur_header->len > 1) &&
+ (ctx->cur_header->str[(ctx->cur_header->len)-1] == '\r') ) {
+ ctx->cur_header->str[(ctx->cur_header->len)-1] = '\0';
+ ctx->cur_header->len--;
+ }
+
+ /* Traverse all signatures */
+ while (sig != NULL) {
+
+ /* SIGNING -------------------------------------------------------------- */
+ if (ctx->mode == PDKIM_MODE_SIGN) {
+ if (header_name_match(ctx->cur_header->str,
+ sig->sign_headers?sig->sign_headers
+ :PDKIM_DEFAULT_SIGN_HEADERS) == 0) {
+ pdkim_stringlist *list = pdkim_append_stringlist(sig->headers,
+ ctx->cur_header->str);
+ if (list == NULL) return PDKIM_ERR_OOM;
+ sig->headers = list;
+ }
+ }
+ /* VERIFICATION --------------------------------------------------------- */
+ else {
+
+ }
+
+ sig = sig->next;
+ }
+ ctx->cur_header->len = 0; /* Re-use existing pdkim_str */
+ return PDKIM_OK;
+};
+
+
+
+/* -------------------------------------------------------------------------- */
+#define HEADER_BUFFER_FRAG_SIZE 256
+int pdkim_feed (pdkim_ctx *ctx,
+ char *data,
+ int len) {
+ int p;
+ for (p=0;p<len;p++) {
+ char c = data[p];
+ if (ctx->past_headers) {
+ /* Processing body byte */
+ ctx->linebuf[(ctx->linebuf_offset)++] = c;
+ if (c == '\n') {
+ int rc = pdkim_bodyline_complete(ctx); /* End of line */
+ if (rc != PDKIM_OK) return rc;
+ }
+ if (ctx->linebuf_offset == (PDKIM_MAX_BODY_LINE_LEN-1))
+ return PDKIM_ERR_LONG_LINE;
+ }
+ else {
+ /* Processing header byte */
+ if (c != '\r') {
+ if (c == '\n') {
+ if (ctx->seen_lf) {
+ int rc = pdkim_header_complete(ctx); /* Seen last header line */
+ if (rc != PDKIM_OK) return rc;
+ ctx->past_headers = 1;
+ ctx->seen_lf = 0;
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream)
+ fprintf(ctx->debug_stream,
+ "PDKIM >> Hashed body data, canonicalized >>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
+#endif
+ continue;
+ }
+ else ctx->seen_lf = 1;
+ }
+ else if (ctx->seen_lf) {
+ if (! ((c == '\t') || (c == ' '))) {
+ int rc = pdkim_header_complete(ctx); /* End of header */
+ if (rc != PDKIM_OK) return rc;
+ }
+ ctx->seen_lf = 0;
+ }
+ }
+ if (ctx->cur_header == NULL) {
+ ctx->cur_header = pdkim_strnew(NULL);
+ if (ctx->cur_header == NULL) return PDKIM_ERR_OOM;
+ }
+ if (pdkim_strncat(ctx->cur_header,&data[p],1) == NULL)
+ return PDKIM_ERR_OOM;
+ }
+ }
+ return PDKIM_OK;
+};
+
+
+/* -------------------------------------------------------------------------- */
+pdkim_str *pdkim_create_header(pdkim_ctx *ctx, int final) {
+
+ pdkim_str *hdr = pdkim_strnew("DKIM-Signature: v="PDKIM_SIGNATURE_VERSION);
+ if (hdr == NULL) return NULL;
+ /* Required and static bits */
+ if (
+ pdkim_strcat(hdr,"; a=") &&
+ pdkim_strcat(hdr,pdkim_algos[ctx->sig->algo]) &&
+ pdkim_strcat(hdr,"; q=") &&
+ pdkim_strcat(hdr,pdkim_querymethods[ctx->sig->querymethod]) &&
+ pdkim_strcat(hdr,"; c=") &&
+ pdkim_strcat(hdr,pdkim_canons[ctx->sig->canon_headers]) &&
+ pdkim_strcat(hdr,"/") &&
+ pdkim_strcat(hdr,pdkim_canons[ctx->sig->canon_body]) &&
+ pdkim_strcat(hdr,"; d=") &&
+ pdkim_strcat(hdr,ctx->sig->domain) &&
+ pdkim_strcat(hdr,"; s=") &&
+ pdkim_strcat(hdr,ctx->sig->selector) &&
+ pdkim_strcat(hdr,";\r\n\th=") &&
+ pdkim_strcat(hdr,ctx->sig->headernames) &&
+ pdkim_strcat(hdr,"; bh=") &&
+ pdkim_strcat(hdr,ctx->sig->bodyhash) &&
+ pdkim_strcat(hdr,";\r\n\t")
+ ) {
+ /* Optional bits */
+ if (ctx->sig->identity != NULL) {
+ if (!( pdkim_strcat(hdr,"i=") &&
+ pdkim_strcat(hdr,ctx->sig->identity) &&
+ pdkim_strcat(hdr,";") ) ) {
+ return NULL;
+ }
+ }
+ if (ctx->sig->created > 0) {
+ if (!( pdkim_strcat(hdr,"t=") &&
+ pdkim_numcat(hdr,ctx->sig->created) &&
+ pdkim_strcat(hdr,";") ) ) {
+ return NULL;
+ }
+ }
+ if (ctx->sig->expires > 0) {
+ if (!( pdkim_strcat(hdr,"x=") &&
+ pdkim_numcat(hdr,ctx->sig->expires) &&
+ pdkim_strcat(hdr,";") ) ) {
+ return NULL;
+ }
+ }
+ if (ctx->sig->bodylength > 0) {
+ if (!( pdkim_strcat(hdr,"l=") &&
+ pdkim_numcat(hdr,ctx->sig->bodylength) &&
+ pdkim_strcat(hdr,";") ) ) {
+ return NULL;
+ }
+ }
+ /* Extra linebreak */
+ if (hdr->str[(hdr->len)-1] == ';') {
+ if (!pdkim_strcat(hdr," \r\n\t")) return NULL;
+ }
+ /* Preliminary or final version? */
+ if (final) {
+ if (
+ pdkim_strcat(hdr,"b=") &&
+ pdkim_strcat(hdr,ctx->sig->sigdata) &&
+ pdkim_strcat(hdr,";")
+ ) return hdr;
+ }
+ else {
+ if (pdkim_strcat(hdr,"b=;")) return hdr;
+ }
+ }
+ return NULL;
+}
+
+
+/* -------------------------------------------------------------------------- */
+int pdkim_feed_finish(pdkim_ctx *ctx) {
+
+ /* Check if we must still flush a (partial) header. If that is the
+ case, the message has no body, and we must compute a body hash
+ out of '<CR><LF>' */
+ if (ctx->cur_header->len) {
+ int rc = pdkim_header_complete(ctx);
+ if (rc != PDKIM_OK) return rc;
+ pdkim_update_bodyhash(ctx,"\r\n",2);
+ }
+ else {
+ /* For non-smtp input, check if there's an unfinished line in the
+ body line buffer. If that is the case, we must add a CRLF to the
+ hash to properly terminate the message. */
+ if ((ctx->input_mode == PDKIM_INPUT_NORMAL) && ctx->linebuf_offset) {
+ pdkim_update_bodyhash(ctx, ctx->linebuf, ctx->linebuf_offset);
+ pdkim_update_bodyhash(ctx,"\r\n",2);
+ }
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream)
+ fprintf(ctx->debug_stream,
+ "\nPDKIM <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n");
+#endif
+ }
+
+ if (pdkim_finish_bodyhash(ctx) != PDKIM_OK) return PDKIM_ERR_OOM;
+
+ /* SIGNING ---------------------------------------------------------------- */
+ if (ctx->mode == PDKIM_MODE_SIGN) {
+ pdkim_stringlist *p;
+ pdkim_str *headernames;
+ pdkim_str *hdr;
+ char *canon_signature;
+ unsigned char headerhash[32];
+ char *headerhash_base64;
+ char *rsa_sig;
+ int sigdata_len = 0;
+ sha1_context sha1_headers;
+ sha2_context sha2_headers;
+ rsa_context rsa;
+ if (ctx->sig->algo == PDKIM_ALGO_RSA_SHA1) sha1_starts(&sha1_headers);
+ else sha2_starts(&sha2_headers,0);
+ /* Run through the accumulated list of to-be-signed headers */
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream)
+ fprintf(ctx->debug_stream,
+ "PDKIM >> Hashed header data, canonicalized, in sequence >>>>>>>>>>>>>>\n");
+#endif
+ headernames = pdkim_strnew(NULL);
+ p = ctx->sig->headers;
+ while (p != NULL) {
+ char *rh = p->value;
+ /* Collect header names (Note: colon presence is guaranteed here) */
+ char *q = strchr(p->value,':');
+ if (pdkim_strncat(headernames, p->value,
+ (q-(p->value))+((p->next==NULL)?0:1)) == NULL)
+ return PDKIM_ERR_OOM;
+ /* Cook the header if using relaxed canon */
+ if (ctx->sig->canon_body == PDKIM_CANON_RELAXED) {
+ rh = pdkim_relax_header(p->value,1);
+ if (rh == NULL) return PDKIM_ERR_OOM;
+ }
+ /* Feed header to the hash algorithm */
+ if (ctx->sig->algo == PDKIM_ALGO_RSA_SHA1)
+ sha1_update(&(sha1_headers),(unsigned char *)rh,strlen(rh));
+ else
+ sha2_update(&(sha2_headers),(unsigned char *)rh,strlen(rh));
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream)
+ pdkim_quoteprint(ctx->debug_stream, rh, strlen(rh), 1);
+#endif
+ p = p->next;
+ }
+
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream)
+ fprintf(ctx->debug_stream,
+ "PDKIM <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n");
+#endif
+
+ /* Copy headernames to signature struct */
+ ctx->sig->headernames = malloc((headernames->len)+1);
+ if (ctx->sig->headernames == NULL) return PDKIM_ERR_OOM;
+ strcpy(ctx->sig->headernames, headernames->str);
+ pdkim_strfree(headernames);
+
+ /* Create signature header with b= omitted */
+ hdr = pdkim_create_header(ctx,0);
+ if (hdr == NULL) return PDKIM_ERR_OOM;
+
+ /* If necessary, perform relaxed canon */
+ canon_signature = hdr->str;
+ if (ctx->sig->canon_headers == PDKIM_CANON_RELAXED) {
+ canon_signature = pdkim_relax_header(canon_signature,0);
+ if (canon_signature == NULL) return PDKIM_ERR_OOM;
+ }
+
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream) {
+ fprintf(ctx->debug_stream,
+ "PDKIM >> Signed DKIM-Signature header, canonicalized >>>>>>>>>>>>>>>>>\n");
+ pdkim_quoteprint(ctx->debug_stream, canon_signature, strlen(canon_signature), 1);
+ fprintf(ctx->debug_stream,
+ "PDKIM <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n");
+ }
+#endif
+
+ /* Feed preliminary signature header to the hash algorithm */
+ if (ctx->sig->algo == PDKIM_ALGO_RSA_SHA1) {
+ int dlen = 0;
+ sha1_update(&(sha1_headers),(unsigned char *)canon_signature,strlen(canon_signature));
+ sha1_finish(&(sha1_headers),headerhash);
+ base64_encode(NULL,&dlen,headerhash,20);
+ headerhash_base64 = malloc(dlen+1);
+ if (headerhash == NULL) return PDKIM_ERR_OOM;
+ base64_encode((unsigned char *)headerhash_base64,&dlen,headerhash,20);
+ headerhash_base64[dlen] = '\0';
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream)
+ fprintf(ctx->debug_stream,
+ "PDKIM SHA1 header hash: %s\n",headerhash_base64);
+#endif
+ }
+ else {
+ int dlen = 0;
+ sha2_update(&(sha2_headers),(unsigned char *)canon_signature,strlen(canon_signature));
+ sha2_finish(&(sha2_headers),headerhash);
+ base64_encode(NULL,&dlen,headerhash,32);
+ headerhash_base64 = malloc(dlen+1);
+ if (headerhash == NULL) return PDKIM_ERR_OOM;
+ base64_encode((unsigned char *)headerhash_base64,&dlen,headerhash,32);
+ headerhash_base64[dlen] = '\0';
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream)
+ fprintf(ctx->debug_stream,
+ "PDKIM SHA256 header hash: %s\n",headerhash_base64);
+#endif
+ }
+
+ if (rsa_parse_key(&rsa, (unsigned char *)ctx->sig->rsa_privkey,
+ strlen(ctx->sig->rsa_privkey), NULL, 0) != 0) {
+ return PDKIM_ERR_RSA_PRIVKEY;
+ }
+
+ rsa_sig = malloc(mpi_size(&(rsa.N)));
+ if (rsa_sig == NULL) return PDKIM_ERR_OOM;
+
+ if (rsa_pkcs1_sign( &rsa, RSA_PRIVATE,
+ ((ctx->sig->algo == PDKIM_ALGO_RSA_SHA1)?
+ RSA_SHA1
+ :
+ RSA_SHA256
+ ),
+ 0, headerhash, (unsigned char *)rsa_sig ) != 0) {
+ return PDKIM_ERR_RSA_SIGNING;
+ }
+
+ base64_encode(NULL,&sigdata_len,(unsigned char *)rsa_sig,mpi_size(&(rsa.N)));
+ ctx->sig->sigdata = malloc(sigdata_len+1);
+ if (ctx->sig->sigdata == NULL) return PDKIM_ERR_OOM;
+ base64_encode((unsigned char *)ctx->sig->sigdata,
+ &sigdata_len,
+ (unsigned char *)rsa_sig,
+ mpi_size(&(rsa.N)));
+ ctx->sig->sigdata[sigdata_len] = '\0';
+
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream)
+ fprintf(ctx->debug_stream,
+ "PDKIM RSA-signed hash: %s\n",ctx->sig->sigdata);
+#endif
+
+ /* Recreate signature header with b= included */
+ pdkim_strfree(hdr);
+ hdr = pdkim_create_header(ctx,1);
+ if (hdr == NULL) return PDKIM_ERR_OOM;
+
+#ifdef PDKIM_DEBUG
+ if (ctx->debug_stream) {
+ fprintf(ctx->debug_stream,
+ "PDKIM >> Final DKIM-Signature header >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
+ fprintf(ctx->debug_stream,"%s\n",hdr->str);
+ //pdkim_quoteprint(ctx->debug_stream, hdr->str, hdr->len, 1);
+ fprintf(ctx->debug_stream,
+ "PDKIM <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n");
+ }
+#endif
+ }
+
+ return PDKIM_OK;
+}
+
+
+/* -------------------------------------------------------------------------- */
+pdkim_ctx *pdkim_init_sign(char *domain,
+ char *selector,
+ char *rsa_privkey) {
+ pdkim_ctx *ctx;
+
+ if (!domain || !selector || !rsa_privkey) return NULL;
+
+ ctx = malloc(sizeof(pdkim_ctx));
+ if (ctx == NULL) return NULL;
+ memset(ctx,0,sizeof(pdkim_ctx));
+ pdkim_signature *sig = malloc(sizeof(pdkim_signature));
+ if (sig == NULL) {
+ free(ctx);
+ return NULL;
+ }
+ memset(sig,0,sizeof(pdkim_signature));
+
+ ctx->mode = PDKIM_MODE_SIGN;
+ ctx->sig = sig;
+
+ ctx->sig->domain = malloc(strlen(domain)+1);
+ ctx->sig->selector = malloc(strlen(selector)+1);
+ ctx->sig->rsa_privkey = malloc(strlen(rsa_privkey)+1);
+
+ if (!ctx->sig->domain || !ctx->sig->selector || !ctx->sig->rsa_privkey) {
+ pdkim_free_ctx(ctx);
+ return NULL;
+ }
+
+ strcpy(ctx->sig->domain, domain);
+ strcpy(ctx->sig->selector, selector);
+ strcpy(ctx->sig->rsa_privkey, rsa_privkey);
+
+ sha1_starts(&(ctx->sig->sha1_body));
+ sha2_starts(&(ctx->sig->sha2_body),0);
+
+ return ctx;
+
+};
+
+#ifdef PDKIM_DEBUG
+/* -------------------------------------------------------------------------- */
+void pdkim_set_debug_stream(pdkim_ctx *ctx,
+ FILE *debug_stream) {
+ ctx->debug_stream = debug_stream;
+};
+#endif
+
+/* -------------------------------------------------------------------------- */
+int pdkim_set_optional(pdkim_ctx *ctx,
+ char *sign_headers,
+ char *identity,
+ int canon_headers,
+ int canon_body,
+ unsigned long bodylength,
+ int algo,
+ unsigned long created,
+ unsigned long expires) {
+
+ if (identity != NULL) {
+ ctx->sig->identity = malloc(strlen(identity)+1);
+ if (!ctx->sig->identity) {
+ return PDKIM_ERR_OOM;
+ }
+ strcpy(ctx->sig->identity, identity);
+ }
+
+ if (sign_headers != NULL) {
+ ctx->sig->sign_headers = malloc(strlen(sign_headers)+1);
+ if (!ctx->sig->sign_headers) {
+ return PDKIM_ERR_OOM;
+ }
+ strcpy(ctx->sig->sign_headers, sign_headers);
+ }
+
+ ctx->sig->canon_headers = canon_headers;
+ ctx->sig->canon_body = canon_body;
+ ctx->sig->bodylength = bodylength;
+ ctx->sig->algo = algo;
+ ctx->sig->created = created;
+ ctx->sig->expires = expires;
+
+ return PDKIM_OK;
+};
+
+
+
+
+/* -------------------------------------------------------------------------- */
+void pdkim_free_sig(pdkim_signature *sig) {
+ if (sig) {
+ pdkim_signature *next = (pdkim_signature *)sig->next;
+
+ pdkim_stringlist *e = sig->headers;
+ while(e != NULL) {
+ pdkim_stringlist *c = e;
+ if (e->value != NULL) free(e->value);
+ e = e->next;
+ free(c);
+ }
+
+ if (sig->sigdata != NULL) free(sig->sigdata);
+ if (sig->bodyhash != NULL) free(sig->bodyhash);
+ if (sig->selector != NULL) free(sig->selector);
+ if (sig->domain != NULL) free(sig->domain);
+ if (sig->identity != NULL) free(sig->identity);
+ if (sig->headernames != NULL) free(sig->headernames);
+ if (sig->copiedheaders != NULL) free(sig->copiedheaders);
+ if (sig->rsa_privkey != NULL) free(sig->rsa_privkey);
+ if (sig->sign_headers != NULL) free(sig->sign_headers);
+
+ free(sig);
+ if (next != NULL) pdkim_free_sig(next);
+ }
+};
+
+
+/* -------------------------------------------------------------------------- */
+void pdkim_free_ctx(pdkim_ctx *ctx) {
+ if (ctx) {
+ pdkim_free_sig(ctx->sig);
+ pdkim_strfree(ctx->cur_header);
+ free(ctx);
+ }
+};
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/pdkim.h,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/* pdkim.h */
+
+#include "sha1.h"
+#include "sha2.h"
+#include "rsa.h"
+#include "base64.h"
+
+#define PDKIM_SIGNATURE_VERSION "1"
+#define PDKIM_MAX_BODY_LINE_LEN 1024
+#define PDKIM_DEBUG
+#define PDKIM_DEFAULT_SIGN_HEADERS "From:Sender:Reply-To:Subject:Date:"\
+ "Message-ID:To:Cc:MIME-Version:Content-Type:"\
+ "Content-Transfer-Encoding:Content-ID:"\
+ "Content-Description:Resent-Date:Resent-From:"\
+ "Resent-Sender:Resent-To:Resent-Cc:"\
+ "Resent-Message-ID:In-Reply-To:References:"\
+ "List-Id:List-Help:List-Unsubscribe:"\
+ "List-Subscribe:List-Post:List-Owner:List-Archive"
+
+
+/* Success / Error codes */
+#define PDKIM_OK 0
+#define PDKIM_FAIL 1
+#define PDKIM_ERR_OOM 100
+#define PDKIM_ERR_RSA_PRIVKEY 101
+#define PDKIM_ERR_RSA_SIGNING 102
+#define PDKIM_ERR_LONG_LINE 103
+
+
+#ifdef PDKIM_DEBUG
+void pdkim_quoteprint(FILE *, char *, int, int);
+#endif
+
+
+typedef struct pdkim_stringlist {
+ char *value;
+ void *next;
+} pdkim_stringlist;
+pdkim_stringlist *pdkim_append_stringlist(pdkim_stringlist *, char *);
+
+
+#define PDKIM_STR_ALLOC_FRAG 256
+typedef struct pdkim_str {
+ char *str;
+ unsigned int len;
+ unsigned int allocated;
+} pdkim_str;
+pdkim_str *pdkim_strnew (char *);
+char *pdkim_strcat (pdkim_str *, char *);
+char *pdkim_strncat(pdkim_str *, char *, int);
+void pdkim_strfree(pdkim_str *);
+
+#define PDKIM_QUERYMETHOD_DNS_TXT 0
+/* extern char *pdkim_querymethods[]; */
+
+#define PDKIM_ALGO_RSA_SHA256 0
+#define PDKIM_ALGO_RSA_SHA1 1
+/* extern char *pdkim_algos[]; */
+
+#define PDKIM_CANON_SIMPLE 0
+#define PDKIM_CANON_RELAXED 1
+/* extern char *pdkim_canons[]; */
+
+
+/* -------------------------------------------------------------------------- */
+/* Public key as (usually) fetched from DNS */
+typedef struct pdkim_pubkey {
+ char *version; /* v= */
+ char *granularity; /* g= */
+
+ int num_hash_algos;
+ int **hash_algos; /* h= */
+
+ int keytype; /* k= */
+ int srvtype; /* s= */
+
+ char *notes; /* n= */
+ char *key; /* p= */
+
+ int testing; /* t=y */
+ int no_subdomaining; /* t=s */
+} pdkim_pubkey;
+
+/* -------------------------------------------------------------------------- */
+/* Signature as it appears in a DKIM-Signature header */
+typedef struct pdkim_signature {
+
+ /* Bits stored in a DKIM signature header */
+ int version; /* v= */
+ int algo; /* a= */
+ int canon_headers; /* c=x/ */
+ int canon_body; /* c=/x */
+ int querymethod; /* q= */
+
+ char *sigdata; /* b= */
+ char *bodyhash; /* bh= */
+
+ char *selector; /* s= */
+ char *domain; /* d= */
+ char *identity; /* i= */
+
+ unsigned long created; /* t= */
+ unsigned long expires; /* x= */
+ unsigned long bodylength; /* l= */
+
+ char *headernames; /* h= */
+ char *copiedheaders; /* z= */
+
+ /* Public key used to verify this signature.
+ (Verification only) */
+ pdkim_pubkey pubkey;
+
+ /* Private RSA key used to create this signature */
+ char *rsa_privkey;
+
+ /* Header field names to include in the signature,
+ colon separated. When NULL, the recommended defaults
+ from RFC 4871 are used. */
+ char *sign_headers;
+
+ /* Per-signature helper variables */
+ sha1_context sha1_body;
+ sha2_context sha2_body;
+ unsigned long signed_body_bytes;
+ pdkim_stringlist *headers;
+
+ /* Verification specific */
+ int verify_result;
+
+ /* Pointer to next signature in list.
+ (Always NULL for signing) */
+ void *next;
+
+} pdkim_signature;
+
+
+/* -------------------------------------------------------------------------- */
+/* Context to keep state between all operations */
+
+#define PDKIM_MODE_SIGN 0
+#define PDKIM_MODE_VERIFY 1
+#define PDKIM_INPUT_NORMAL 0
+#define PDKIM_INPUT_SMTP 1
+
+typedef struct pdkim_ctx {
+
+ /* PDKIM_MODE_VERIFY or PDKIM_MODE_SIGN */
+ int mode;
+
+ /* PDKIM_INPUT_SMTP or PDKIM_INPUT_NORMAL */
+ int input_mode;
+
+ /* One (signing) or several chained (verification) signatures */
+ pdkim_signature *sig;
+
+ /* Coder's little helpers */
+ pdkim_str *cur_header;
+ char linebuf[PDKIM_MAX_BODY_LINE_LEN];
+ int linebuf_offset;
+ int seen_lf;
+ int seen_eod;
+ int past_headers;
+ int num_buffered_crlf;
+
+#ifdef PDKIM_DEBUG
+ /* A FILE pointer. When not NULL, debug output will be generated
+ and sent to this stream */
+ FILE *debug_stream;
+#endif
+
+} pdkim_ctx;
+
+
+int header_name_match (char *, char *);
+char *pdkim_relax_header (char *, int);
+
+int pdkim_update_bodyhash (pdkim_ctx *, char *, int);
+int pdkim_finish_bodyhash (pdkim_ctx *);
+
+int pdkim_bodyline_complete (pdkim_ctx *);
+int pdkim_header_complete (pdkim_ctx *);
+
+int pdkim_feed (pdkim_ctx *, char *data, int len);
+int pdkim_feed_finish (pdkim_ctx *);
+
+pdkim_str
+ *pdkim_create_header (pdkim_ctx *, int);
+
+pdkim_ctx
+ *pdkim_init_sign (char *, char *, char *);
+
+int pdkim_set_optional (pdkim_ctx *, char *, char *,
+ int, int,
+ unsigned long, int,
+ unsigned long,
+ unsigned long);
+
+void pdkim_free_sig (pdkim_signature *);
+void pdkim_free_ctx (pdkim_ctx *);
+
+
+#ifdef PDKIM_DEBUG
+void pdkim_set_debug_stream (pdkim_ctx *, FILE *);
+#endif
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/rsa.c,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/*
+ * The RSA public-key cryptosystem
+ *
+ * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
+ *
+ * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+/*
+ * RSA was designed by Ron Rivest, Adi Shamir and Len Adleman.
+ *
+ * http://theory.lcs.mit.edu/~rivest/rsapaper.pdf
+ * http://www.cacr.math.uwaterloo.ca/hac/about/chap8.pdf
+ */
+
+#include "rsa.h"
+#include "base64.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+/*
+ * Initialize an RSA context
+ */
+void rsa_init( rsa_context *ctx,
+ int padding,
+ int hash_id,
+ int (*f_rng)(void *),
+ void *p_rng )
+{
+ memset( ctx, 0, sizeof( rsa_context ) );
+
+ ctx->padding = padding;
+ ctx->hash_id = hash_id;
+
+ ctx->f_rng = f_rng;
+ ctx->p_rng = p_rng;
+}
+
+
+/*
+ * Check a public RSA key
+ */
+int rsa_check_pubkey( rsa_context *ctx )
+{
+ if( ( ctx->N.p[0] & 1 ) == 0 ||
+ ( ctx->E.p[0] & 1 ) == 0 )
+ return( POLARSSL_ERR_RSA_KEY_CHECK_FAILED );
+
+ if( mpi_msb( &ctx->N ) < 128 ||
+ mpi_msb( &ctx->N ) > 4096 )
+ return( POLARSSL_ERR_RSA_KEY_CHECK_FAILED );
+
+ if( mpi_msb( &ctx->E ) < 2 ||
+ mpi_msb( &ctx->E ) > 64 )
+ return( POLARSSL_ERR_RSA_KEY_CHECK_FAILED );
+
+ return( 0 );
+}
+
+/*
+ * Check a private RSA key
+ */
+int rsa_check_privkey( rsa_context *ctx )
+{
+ int ret;
+ mpi PQ, DE, P1, Q1, H, I, G;
+
+ if( ( ret = rsa_check_pubkey( ctx ) ) != 0 )
+ return( ret );
+
+ mpi_init( &PQ, &DE, &P1, &Q1, &H, &I, &G, NULL );
+
+ MPI_CHK( mpi_mul_mpi( &PQ, &ctx->P, &ctx->Q ) );
+ MPI_CHK( mpi_mul_mpi( &DE, &ctx->D, &ctx->E ) );
+ MPI_CHK( mpi_sub_int( &P1, &ctx->P, 1 ) );
+ MPI_CHK( mpi_sub_int( &Q1, &ctx->Q, 1 ) );
+ MPI_CHK( mpi_mul_mpi( &H, &P1, &Q1 ) );
+ MPI_CHK( mpi_mod_mpi( &I, &DE, &H ) );
+ MPI_CHK( mpi_gcd( &G, &ctx->E, &H ) );
+
+ if( mpi_cmp_mpi( &PQ, &ctx->N ) == 0 &&
+ mpi_cmp_int( &I, 1 ) == 0 &&
+ mpi_cmp_int( &G, 1 ) == 0 )
+ {
+ mpi_free( &G, &I, &H, &Q1, &P1, &DE, &PQ, NULL );
+ return( 0 );
+ }
+
+cleanup:
+
+ mpi_free( &G, &I, &H, &Q1, &P1, &DE, &PQ, NULL );
+ return( POLARSSL_ERR_RSA_KEY_CHECK_FAILED | ret );
+}
+
+/*
+ * Do an RSA public key operation
+ */
+int rsa_public( rsa_context *ctx,
+ unsigned char *input,
+ unsigned char *output )
+{
+ int ret, olen;
+ mpi T;
+
+ mpi_init( &T, NULL );
+
+ MPI_CHK( mpi_read_binary( &T, input, ctx->len ) );
+
+ if( mpi_cmp_mpi( &T, &ctx->N ) >= 0 )
+ {
+ mpi_free( &T, NULL );
+ return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+ }
+
+ olen = ctx->len;
+ MPI_CHK( mpi_exp_mod( &T, &T, &ctx->E, &ctx->N, &ctx->RN ) );
+ MPI_CHK( mpi_write_binary( &T, output, olen ) );
+
+cleanup:
+
+ mpi_free( &T, NULL );
+
+ if( ret != 0 )
+ return( POLARSSL_ERR_RSA_PUBLIC_FAILED | ret );
+
+ return( 0 );
+}
+
+/*
+ * Do an RSA private key operation
+ */
+int rsa_private( rsa_context *ctx,
+ unsigned char *input,
+ unsigned char *output )
+{
+ int ret, olen;
+ mpi T, T1, T2;
+
+ mpi_init( &T, &T1, &T2, NULL );
+
+ MPI_CHK( mpi_read_binary( &T, input, ctx->len ) );
+
+ if( mpi_cmp_mpi( &T, &ctx->N ) >= 0 )
+ {
+ mpi_free( &T, NULL );
+ return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+ }
+
+#if 0
+ MPI_CHK( mpi_exp_mod( &T, &T, &ctx->D, &ctx->N, &ctx->RN ) );
+#else
+ /*
+ * faster decryption using the CRT
+ *
+ * T1 = input ^ dP mod P
+ * T2 = input ^ dQ mod Q
+ */
+ MPI_CHK( mpi_exp_mod( &T1, &T, &ctx->DP, &ctx->P, &ctx->RP ) );
+ MPI_CHK( mpi_exp_mod( &T2, &T, &ctx->DQ, &ctx->Q, &ctx->RQ ) );
+
+ /*
+ * T = (T1 - T2) * (Q^-1 mod P) mod P
+ */
+ MPI_CHK( mpi_sub_mpi( &T, &T1, &T2 ) );
+ MPI_CHK( mpi_mul_mpi( &T1, &T, &ctx->QP ) );
+ MPI_CHK( mpi_mod_mpi( &T, &T1, &ctx->P ) );
+
+ /*
+ * output = T2 + T * Q
+ */
+ MPI_CHK( mpi_mul_mpi( &T1, &T, &ctx->Q ) );
+ MPI_CHK( mpi_add_mpi( &T, &T2, &T1 ) );
+#endif
+
+ olen = ctx->len;
+ MPI_CHK( mpi_write_binary( &T, output, olen ) );
+
+cleanup:
+
+ mpi_free( &T, &T1, &T2, NULL );
+
+ if( ret != 0 )
+ return( POLARSSL_ERR_RSA_PRIVATE_FAILED | ret );
+
+ return( 0 );
+}
+
+/*
+ * Add the message padding, then do an RSA operation
+ */
+int rsa_pkcs1_encrypt( rsa_context *ctx,
+ int mode, int ilen,
+ unsigned char *input,
+ unsigned char *output )
+{
+ int nb_pad, olen;
+ unsigned char *p = output;
+
+ olen = ctx->len;
+
+ switch( ctx->padding )
+ {
+ case RSA_PKCS_V15:
+
+ if( ilen < 0 || olen < ilen + 11 )
+ return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+
+ nb_pad = olen - 3 - ilen;
+
+ *p++ = 0;
+ *p++ = RSA_CRYPT;
+
+ while( nb_pad-- > 0 )
+ {
+ do {
+ *p = (unsigned char) rand();
+ } while( *p == 0 );
+ p++;
+ }
+ *p++ = 0;
+ memcpy( p, input, ilen );
+ break;
+
+ default:
+
+ return( POLARSSL_ERR_RSA_INVALID_PADDING );
+ }
+
+ return( ( mode == RSA_PUBLIC )
+ ? rsa_public( ctx, output, output )
+ : rsa_private( ctx, output, output ) );
+}
+
+/*
+ * Do an RSA operation, then remove the message padding
+ */
+int rsa_pkcs1_decrypt( rsa_context *ctx,
+ int mode, int *olen,
+ unsigned char *input,
+ unsigned char *output,
+ int output_max_len)
+{
+ int ret, ilen;
+ unsigned char *p;
+ unsigned char buf[512];
+
+ ilen = ctx->len;
+
+ if( ilen < 16 || ilen > (int) sizeof( buf ) )
+ return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+
+ ret = ( mode == RSA_PUBLIC )
+ ? rsa_public( ctx, input, buf )
+ : rsa_private( ctx, input, buf );
+
+ if( ret != 0 )
+ return( ret );
+
+ p = buf;
+
+ switch( ctx->padding )
+ {
+ case RSA_PKCS_V15:
+
+ if( *p++ != 0 || *p++ != RSA_CRYPT )
+ return( POLARSSL_ERR_RSA_INVALID_PADDING );
+
+ while( *p != 0 )
+ {
+ if( p >= buf + ilen - 1 )
+ return( POLARSSL_ERR_RSA_INVALID_PADDING );
+ p++;
+ }
+ p++;
+ break;
+
+ default:
+
+ return( POLARSSL_ERR_RSA_INVALID_PADDING );
+ }
+
+ if (ilen - (int)(p - buf) > output_max_len)
+ return( POLARSSL_ERR_RSA_OUTPUT_TO_LARGE );
+
+ *olen = ilen - (int)(p - buf);
+ memcpy( output, p, *olen );
+
+ return( 0 );
+}
+
+/*
+ * Do an RSA operation to sign the message digest
+ */
+int rsa_pkcs1_sign( rsa_context *ctx,
+ int mode,
+ int hash_id,
+ int hashlen,
+ unsigned char *hash,
+ unsigned char *sig )
+{
+ int nb_pad, olen;
+ unsigned char *p = sig;
+
+ olen = ctx->len;
+
+ switch( ctx->padding )
+ {
+ case RSA_PKCS_V15:
+
+ switch( hash_id )
+ {
+ case RSA_RAW:
+ nb_pad = olen - 3 - hashlen;
+ break;
+
+ case RSA_MD2:
+ case RSA_MD4:
+ case RSA_MD5:
+ nb_pad = olen - 3 - 16 - 18;
+ break;
+
+ case RSA_SHA1:
+ nb_pad = olen - 3 - 20 - 15;
+ break;
+
+ case RSA_SHA256:
+ nb_pad = olen - 3 - 32 - 19;
+ break;
+
+ default:
+ return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+ }
+
+ if( nb_pad < 8 )
+ return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+
+ *p++ = 0;
+ *p++ = RSA_SIGN;
+ memset( p, 0xFF, nb_pad );
+ p += nb_pad;
+ *p++ = 0;
+ break;
+
+ default:
+
+ return( POLARSSL_ERR_RSA_INVALID_PADDING );
+ }
+
+ switch( hash_id )
+ {
+ case RSA_RAW:
+ memcpy( p, hash, hashlen );
+ break;
+
+ case RSA_MD2:
+ memcpy( p, ASN1_HASH_MDX, 18 );
+ memcpy( p + 18, hash, 16 );
+ p[13] = 2; break;
+
+ case RSA_MD4:
+ memcpy( p, ASN1_HASH_MDX, 18 );
+ memcpy( p + 18, hash, 16 );
+ p[13] = 4; break;
+
+ case RSA_MD5:
+ memcpy( p, ASN1_HASH_MDX, 18 );
+ memcpy( p + 18, hash, 16 );
+ p[13] = 5; break;
+
+ case RSA_SHA1:
+ memcpy( p, ASN1_HASH_SHA1, 15 );
+ memcpy( p + 15, hash, 20 );
+ break;
+
+ case RSA_SHA256:
+ memcpy( p, ASN1_HASH_SHA256, 19 );
+ memcpy( p + 19, hash, 32 );
+ break;
+
+ default:
+ return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+ }
+
+ return( ( mode == RSA_PUBLIC )
+ ? rsa_public( ctx, sig, sig )
+ : rsa_private( ctx, sig, sig ) );
+}
+
+/*
+ * Do an RSA operation and check the message digest
+ */
+int rsa_pkcs1_verify( rsa_context *ctx,
+ int mode,
+ int hash_id,
+ int hashlen,
+ unsigned char *hash,
+ unsigned char *sig )
+{
+ int ret, len, siglen;
+ unsigned char *p, c;
+ unsigned char buf[512];
+
+ siglen = ctx->len;
+
+ if( siglen < 16 || siglen > (int) sizeof( buf ) )
+ return( POLARSSL_ERR_RSA_BAD_INPUT_DATA );
+
+ ret = ( mode == RSA_PUBLIC )
+ ? rsa_public( ctx, sig, buf )
+ : rsa_private( ctx, sig, buf );
+
+ if( ret != 0 )
+ return( ret );
+
+ p = buf;
+
+ switch( ctx->padding )
+ {
+ case RSA_PKCS_V15:
+
+ if( *p++ != 0 || *p++ != RSA_SIGN )
+ return( POLARSSL_ERR_RSA_INVALID_PADDING );
+
+ while( *p != 0 )
+ {
+ if( p >= buf + siglen - 1 || *p != 0xFF )
+ return( POLARSSL_ERR_RSA_INVALID_PADDING );
+ p++;
+ }
+ p++;
+ break;
+
+ default:
+
+ return( POLARSSL_ERR_RSA_INVALID_PADDING );
+ }
+
+ len = siglen - (int)( p - buf );
+
+ if( len == 34 )
+ {
+ c = p[13];
+ p[13] = 0;
+
+ if( memcmp( p, ASN1_HASH_MDX, 18 ) != 0 )
+ return( POLARSSL_ERR_RSA_VERIFY_FAILED );
+
+ if( ( c == 2 && hash_id == RSA_MD2 ) ||
+ ( c == 4 && hash_id == RSA_MD4 ) ||
+ ( c == 5 && hash_id == RSA_MD5 ) )
+ {
+ if( memcmp( p + 18, hash, 16 ) == 0 )
+ return( 0 );
+ else
+ return( POLARSSL_ERR_RSA_VERIFY_FAILED );
+ }
+ }
+
+ if( len == 35 && hash_id == RSA_SHA1 )
+ {
+ if( memcmp( p, ASN1_HASH_SHA1, 15 ) == 0 &&
+ memcmp( p + 15, hash, 20 ) == 0 )
+ return( 0 );
+ else
+ return( POLARSSL_ERR_RSA_VERIFY_FAILED );
+ }
+
+ if( len == hashlen && hash_id == RSA_RAW )
+ {
+ if( memcmp( p, hash, hashlen ) == 0 )
+ return( 0 );
+ else
+ return( POLARSSL_ERR_RSA_VERIFY_FAILED );
+ }
+
+ return( POLARSSL_ERR_RSA_INVALID_PADDING );
+}
+
+/*
+ * Free the components of an RSA key
+ */
+void rsa_free( rsa_context *ctx )
+{
+ mpi_free( &ctx->RQ, &ctx->RP, &ctx->RN,
+ &ctx->QP, &ctx->DQ, &ctx->DP,
+ &ctx->Q, &ctx->P, &ctx->D,
+ &ctx->E, &ctx->N, NULL );
+}
+
+/*
+ * ASN.1 DER decoding routines
+ */
+static int asn1_get_len( unsigned char **p,
+ unsigned char *end,
+ int *len )
+{
+ if( ( end - *p ) < 1 )
+ return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
+
+ if( ( **p & 0x80 ) == 0 )
+ *len = *(*p)++;
+ else
+ {
+ switch( **p & 0x7F )
+ {
+ case 1:
+ if( ( end - *p ) < 2 )
+ return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
+
+ *len = (*p)[1];
+ (*p) += 2;
+ break;
+
+ case 2:
+ if( ( end - *p ) < 3 )
+ return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
+
+ *len = ( (*p)[1] << 8 ) | (*p)[2];
+ (*p) += 3;
+ break;
+
+ default:
+ return( POLARSSL_ERR_ASN1_INVALID_LENGTH );
+ break;
+ }
+ }
+
+ if( *len > (int) ( end - *p ) )
+ return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
+
+ return( 0 );
+}
+
+static int asn1_get_tag( unsigned char **p,
+ unsigned char *end,
+ int *len, int tag )
+{
+ if( ( end - *p ) < 1 )
+ return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
+
+ if( **p != tag )
+ return( POLARSSL_ERR_ASN1_UNEXPECTED_TAG );
+
+ (*p)++;
+
+ return( asn1_get_len( p, end, len ) );
+}
+
+static int asn1_get_int( unsigned char **p,
+ unsigned char *end,
+ int *val )
+{
+ int ret, len;
+
+ if( ( ret = asn1_get_tag( p, end, &len, ASN1_INTEGER ) ) != 0 )
+ return( ret );
+
+ if( len > (int) sizeof( int ) || ( **p & 0x80 ) != 0 )
+ return( POLARSSL_ERR_ASN1_INVALID_LENGTH );
+
+ *val = 0;
+
+ while( len-- > 0 )
+ {
+ *val = ( *val << 8 ) | **p;
+ (*p)++;
+ }
+
+ return( 0 );
+}
+
+static int asn1_get_mpi( unsigned char **p,
+ unsigned char *end,
+ mpi *X )
+{
+ int ret, len;
+
+ if( ( ret = asn1_get_tag( p, end, &len, ASN1_INTEGER ) ) != 0 )
+ return( ret );
+
+ ret = mpi_read_binary( X, *p, len );
+
+ *p += len;
+
+ return( ret );
+}
+
+
+/*
+ * Parse a private RSA key
+ */
+int rsa_parse_key( rsa_context *rsa, unsigned char *buf, int buflen,
+ unsigned char *pwd, int pwdlen )
+{
+ int ret, len, enc;
+ unsigned char *s1, *s2;
+ unsigned char *p, *end;
+
+ s1 = (unsigned char *) strstr( (char *) buf,
+ "-----BEGIN RSA PRIVATE KEY-----" );
+
+ if( s1 != NULL )
+ {
+ s2 = (unsigned char *) strstr( (char *) buf,
+ "-----END RSA PRIVATE KEY-----" );
+
+ if( s2 == NULL || s2 <= s1 )
+ return( POLARSSL_ERR_X509_KEY_INVALID_PEM );
+
+ s1 += 31;
+ if( *s1 == '\r' ) s1++;
+ if( *s1 == '\n' ) s1++;
+ else return( POLARSSL_ERR_X509_KEY_INVALID_PEM );
+
+ enc = 0;
+
+ if( memcmp( s1, "Proc-Type: 4,ENCRYPTED", 22 ) == 0 )
+ {
+ return( POLARSSL_ERR_X509_FEATURE_UNAVAILABLE );
+ }
+
+ len = 0;
+ ret = base64_decode( NULL, &len, s1, s2 - s1 );
+
+ if( ret == POLARSSL_ERR_BASE64_INVALID_CHARACTER )
+ return( ret | POLARSSL_ERR_X509_KEY_INVALID_PEM );
+
+ if( ( buf = (unsigned char *) malloc( len ) ) == NULL )
+ return( 1 );
+
+ if( ( ret = base64_decode( buf, &len, s1, s2 - s1 ) ) != 0 )
+ {
+ free( buf );
+ return( ret | POLARSSL_ERR_X509_KEY_INVALID_PEM );
+ }
+
+ buflen = len;
+
+ if( enc != 0 )
+ {
+ return( POLARSSL_ERR_X509_FEATURE_UNAVAILABLE );
+ }
+ }
+
+ memset( rsa, 0, sizeof( rsa_context ) );
+
+ p = buf;
+ end = buf + buflen;
+
+ /*
+ * RSAPrivateKey ::= SEQUENCE {
+ * version Version,
+ * modulus INTEGER, -- n
+ * publicExponent INTEGER, -- e
+ * privateExponent INTEGER, -- d
+ * prime1 INTEGER, -- p
+ * prime2 INTEGER, -- q
+ * exponent1 INTEGER, -- d mod (p-1)
+ * exponent2 INTEGER, -- d mod (q-1)
+ * coefficient INTEGER, -- (inverse of q) mod p
+ * otherPrimeInfos OtherPrimeInfos OPTIONAL
+ * }
+ */
+ if( ( ret = asn1_get_tag( &p, end, &len,
+ ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
+ {
+ if( s1 != NULL )
+ free( buf );
+
+ rsa_free( rsa );
+ return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT | ret );
+ }
+
+ end = p + len;
+
+ if( ( ret = asn1_get_int( &p, end, &rsa->ver ) ) != 0 )
+ {
+ if( s1 != NULL )
+ free( buf );
+
+ rsa_free( rsa );
+ return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT | ret );
+ }
+
+ if( rsa->ver != 0 )
+ {
+ if( s1 != NULL )
+ free( buf );
+
+ rsa_free( rsa );
+ return( ret | POLARSSL_ERR_X509_KEY_INVALID_VERSION );
+ }
+
+ if( ( ret = asn1_get_mpi( &p, end, &rsa->N ) ) != 0 ||
+ ( ret = asn1_get_mpi( &p, end, &rsa->E ) ) != 0 ||
+ ( ret = asn1_get_mpi( &p, end, &rsa->D ) ) != 0 ||
+ ( ret = asn1_get_mpi( &p, end, &rsa->P ) ) != 0 ||
+ ( ret = asn1_get_mpi( &p, end, &rsa->Q ) ) != 0 ||
+ ( ret = asn1_get_mpi( &p, end, &rsa->DP ) ) != 0 ||
+ ( ret = asn1_get_mpi( &p, end, &rsa->DQ ) ) != 0 ||
+ ( ret = asn1_get_mpi( &p, end, &rsa->QP ) ) != 0 )
+ {
+ if( s1 != NULL )
+ free( buf );
+
+ rsa_free( rsa );
+ return( ret | POLARSSL_ERR_X509_KEY_INVALID_FORMAT );
+ }
+
+ rsa->len = mpi_size( &rsa->N );
+
+ if( p != end )
+ {
+ if( s1 != NULL )
+ free( buf );
+
+ rsa_free( rsa );
+ return( POLARSSL_ERR_X509_KEY_INVALID_FORMAT |
+ POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
+ }
+
+ if( ( ret = rsa_check_privkey( rsa ) ) != 0 )
+ {
+ if( s1 != NULL )
+ free( buf );
+
+ rsa_free( rsa );
+ return( ret );
+ }
+
+ if( s1 != NULL )
+ free( buf );
+
+ return( 0 );
+}
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/rsa.h,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/**
+ * \file rsa.h
+ *
+ * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
+ *
+ * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef POLARSSL_RSA_H
+#define POLARSSL_RSA_H
+
+#include "bignum.h"
+
+#define POLARSSL_ERR_RSA_BAD_INPUT_DATA -0x0400
+#define POLARSSL_ERR_RSA_INVALID_PADDING -0x0410
+#define POLARSSL_ERR_RSA_KEY_GEN_FAILED -0x0420
+#define POLARSSL_ERR_RSA_KEY_CHECK_FAILED -0x0430
+#define POLARSSL_ERR_RSA_PUBLIC_FAILED -0x0440
+#define POLARSSL_ERR_RSA_PRIVATE_FAILED -0x0450
+#define POLARSSL_ERR_RSA_VERIFY_FAILED -0x0460
+#define POLARSSL_ERR_RSA_OUTPUT_TO_LARGE -0x0470
+
+#define POLARSSL_ERR_ASN1_OUT_OF_DATA -0x0014
+#define POLARSSL_ERR_ASN1_UNEXPECTED_TAG -0x0016
+#define POLARSSL_ERR_ASN1_INVALID_LENGTH -0x0018
+#define POLARSSL_ERR_ASN1_LENGTH_MISMATCH -0x001A
+#define POLARSSL_ERR_ASN1_INVALID_DATA -0x001C
+
+#define POLARSSL_ERR_X509_FEATURE_UNAVAILABLE -0x0020
+#define POLARSSL_ERR_X509_CERT_INVALID_PEM -0x0040
+#define POLARSSL_ERR_X509_CERT_INVALID_FORMAT -0x0060
+#define POLARSSL_ERR_X509_CERT_INVALID_VERSION -0x0080
+#define POLARSSL_ERR_X509_CERT_INVALID_SERIAL -0x00A0
+#define POLARSSL_ERR_X509_CERT_INVALID_ALG -0x00C0
+#define POLARSSL_ERR_X509_CERT_INVALID_NAME -0x00E0
+#define POLARSSL_ERR_X509_CERT_INVALID_DATE -0x0100
+#define POLARSSL_ERR_X509_CERT_INVALID_PUBKEY -0x0120
+#define POLARSSL_ERR_X509_CERT_INVALID_SIGNATURE -0x0140
+#define POLARSSL_ERR_X509_CERT_INVALID_EXTENSIONS -0x0160
+#define POLARSSL_ERR_X509_CERT_UNKNOWN_VERSION -0x0180
+#define POLARSSL_ERR_X509_CERT_UNKNOWN_SIG_ALG -0x01A0
+#define POLARSSL_ERR_X509_CERT_UNKNOWN_PK_ALG -0x01C0
+#define POLARSSL_ERR_X509_CERT_SIG_MISMATCH -0x01E0
+#define POLARSSL_ERR_X509_CERT_VERIFY_FAILED -0x0200
+#define POLARSSL_ERR_X509_KEY_INVALID_PEM -0x0220
+#define POLARSSL_ERR_X509_KEY_INVALID_VERSION -0x0240
+#define POLARSSL_ERR_X509_KEY_INVALID_FORMAT -0x0260
+#define POLARSSL_ERR_X509_KEY_INVALID_ENC_IV -0x0280
+#define POLARSSL_ERR_X509_KEY_UNKNOWN_ENC_ALG -0x02A0
+#define POLARSSL_ERR_X509_KEY_PASSWORD_REQUIRED -0x02C0
+#define POLARSSL_ERR_X509_KEY_PASSWORD_MISMATCH -0x02E0
+#define POLARSSL_ERR_X509_POINT_ERROR -0x0300
+#define POLARSSL_ERR_X509_VALUE_TO_LENGTH -0x0320
+
+/*
+ * DER constants
+ */
+#define ASN1_BOOLEAN 0x01
+#define ASN1_INTEGER 0x02
+#define ASN1_BIT_STRING 0x03
+#define ASN1_OCTET_STRING 0x04
+#define ASN1_NULL 0x05
+#define ASN1_OID 0x06
+#define ASN1_UTF8_STRING 0x0C
+#define ASN1_SEQUENCE 0x10
+#define ASN1_SET 0x11
+#define ASN1_PRINTABLE_STRING 0x13
+#define ASN1_T61_STRING 0x14
+#define ASN1_IA5_STRING 0x16
+#define ASN1_UTC_TIME 0x17
+#define ASN1_UNIVERSAL_STRING 0x1C
+#define ASN1_BMP_STRING 0x1E
+#define ASN1_PRIMITIVE 0x00
+#define ASN1_CONSTRUCTED 0x20
+#define ASN1_CONTEXT_SPECIFIC 0x80
+
+/*
+ * PKCS#1 constants
+ */
+#define RSA_RAW 0
+#define RSA_MD2 2
+#define RSA_MD4 3
+#define RSA_MD5 4
+#define RSA_SHA1 5
+#define RSA_SHA256 6
+
+#define RSA_PUBLIC 0
+#define RSA_PRIVATE 1
+
+#define RSA_PKCS_V15 0
+#define RSA_PKCS_V21 1
+
+#define RSA_SIGN 1
+#define RSA_CRYPT 2
+
+/*
+ * DigestInfo ::= SEQUENCE {
+ * digestAlgorithm DigestAlgorithmIdentifier,
+ * digest Digest }
+ *
+ * DigestAlgorithmIdentifier ::= AlgorithmIdentifier
+ *
+ * Digest ::= OCTET STRING
+ */
+#define ASN1_HASH_MDX \
+ "\x30\x20\x30\x0C\x06\x08\x2A\x86\x48" \
+ "\x86\xF7\x0D\x02\x00\x05\x00\x04\x10"
+
+#define ASN1_HASH_SHA1 \
+ "\x30\x21\x30\x09\x06\x05\x2B\x0E\x03" \
+ "\x02\x1A\x05\x00\x04\x14"
+
+#define ASN1_HASH_SHA256 \
+ "\x30\x21\x30\x09" \
+ "\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x02" \
+ "\x05\x00\x04\x20"
+
+
+/**
+ * \brief RSA context structure
+ */
+typedef struct
+{
+ int ver; /*!< always 0 */
+ int len; /*!< size(N) in chars */
+
+ mpi N; /*!< public modulus */
+ mpi E; /*!< public exponent */
+
+ mpi D; /*!< private exponent */
+ mpi P; /*!< 1st prime factor */
+ mpi Q; /*!< 2nd prime factor */
+ mpi DP; /*!< D % (P - 1) */
+ mpi DQ; /*!< D % (Q - 1) */
+ mpi QP; /*!< 1 / (Q % P) */
+
+ mpi RN; /*!< cached R^2 mod N */
+ mpi RP; /*!< cached R^2 mod P */
+ mpi RQ; /*!< cached R^2 mod Q */
+
+ int padding; /*!< 1.5 or OAEP/PSS */
+ int hash_id; /*!< hash identifier */
+ int (*f_rng)(void *); /*!< RNG function */
+ void *p_rng; /*!< RNG parameter */
+}
+rsa_context;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Initialize an RSA context
+ *
+ * \param ctx RSA context to be initialized
+ * \param padding RSA_PKCS_V15 or RSA_PKCS_V21
+ * \param hash_id RSA_PKCS_V21 hash identifier
+ * \param f_rng RNG function
+ * \param p_rng RNG parameter
+ *
+ * \note The hash_id parameter is actually ignored
+ * when using RSA_PKCS_V15 padding.
+ *
+ * \note Currently (xyssl-0.8), RSA_PKCS_V21 padding
+ * is not supported.
+ */
+void rsa_init( rsa_context *ctx,
+ int padding,
+ int hash_id,
+ int (*f_rng)(void *),
+ void *p_rng );
+
+/**
+ * \brief Generate an RSA keypair
+ *
+ * \param ctx RSA context that will hold the key
+ * \param nbits size of the public key in bits
+ * \param exponent public exponent (e.g., 65537)
+ *
+ * \note rsa_init() must be called beforehand to setup
+ * the RSA context (especially f_rng and p_rng).
+ *
+ * \return 0 if successful, or an POLARSSL_ERR_RSA_XXX error code
+ */
+int rsa_gen_key( rsa_context *ctx, int nbits, int exponent );
+
+/**
+ * \brief Check a public RSA key
+ *
+ * \param ctx RSA context to be checked
+ *
+ * \return 0 if successful, or an POLARSSL_ERR_RSA_XXX error code
+ */
+int rsa_check_pubkey( rsa_context *ctx );
+
+/**
+ * \brief Check a private RSA key
+ *
+ * \param ctx RSA context to be checked
+ *
+ * \return 0 if successful, or an POLARSSL_ERR_RSA_XXX error code
+ */
+int rsa_check_privkey( rsa_context *ctx );
+
+/**
+ * \brief Do an RSA public key operation
+ *
+ * \param ctx RSA context
+ * \param input input buffer
+ * \param output output buffer
+ *
+ * \return 0 if successful, or an POLARSSL_ERR_RSA_XXX error code
+ *
+ * \note This function does NOT take care of message
+ * padding. Also, be sure to set input[0] = 0.
+ *
+ * \note The input and output buffers must be large
+ * enough (eg. 128 bytes if RSA-1024 is used).
+ */
+int rsa_public( rsa_context *ctx,
+ unsigned char *input,
+ unsigned char *output );
+
+/**
+ * \brief Do an RSA private key operation
+ *
+ * \param ctx RSA context
+ * \param input input buffer
+ * \param output output buffer
+ *
+ * \return 0 if successful, or an POLARSSL_ERR_RSA_XXX error code
+ *
+ * \note The input and output buffers must be large
+ * enough (eg. 128 bytes if RSA-1024 is used).
+ */
+int rsa_private( rsa_context *ctx,
+ unsigned char *input,
+ unsigned char *output );
+
+/**
+ * \brief Add the message padding, then do an RSA operation
+ *
+ * \param ctx RSA context
+ * \param mode RSA_PUBLIC or RSA_PRIVATE
+ * \param ilen contains the the plaintext length
+ * \param input buffer holding the data to be encrypted
+ * \param output buffer that will hold the ciphertext
+ *
+ * \return 0 if successful, or an POLARSSL_ERR_RSA_XXX error code
+ *
+ * \note The output buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ */
+int rsa_pkcs1_encrypt( rsa_context *ctx,
+ int mode, int ilen,
+ unsigned char *input,
+ unsigned char *output );
+
+/**
+ * \brief Do an RSA operation, then remove the message padding
+ *
+ * \param ctx RSA context
+ * \param mode RSA_PUBLIC or RSA_PRIVATE
+ * \param input buffer holding the encrypted data
+ * \param output buffer that will hold the plaintext
+ * \param olen will contain the plaintext length
+ * \param output_max_len maximum length of the output buffer
+ *
+ * \return 0 if successful, or an POLARSSL_ERR_RSA_XXX error code
+ *
+ * \note The output buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used) otherwise
+ * an error is thrown.
+ */
+int rsa_pkcs1_decrypt( rsa_context *ctx,
+ int mode, int *olen,
+ unsigned char *input,
+ unsigned char *output,
+ int output_max_len);
+
+/**
+ * \brief Do a private RSA to sign a message digest
+ *
+ * \param ctx RSA context
+ * \param mode RSA_PUBLIC or RSA_PRIVATE
+ * \param hash_id RSA_RAW, RSA_MD{2,4,5} or RSA_SHA{1,256}
+ * \param hashlen message digest length (for RSA_RAW only)
+ * \param hash buffer holding the message digest
+ * \param sig buffer that will hold the ciphertext
+ *
+ * \return 0 if the signing operation was successful,
+ * or an POLARSSL_ERR_RSA_XXX error code
+ *
+ * \note The "sig" buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ */
+int rsa_pkcs1_sign( rsa_context *ctx,
+ int mode,
+ int hash_id,
+ int hashlen,
+ unsigned char *hash,
+ unsigned char *sig );
+
+/**
+ * \brief Do a public RSA and check the message digest
+ *
+ * \param ctx points to an RSA public key
+ * \param mode RSA_PUBLIC or RSA_PRIVATE
+ * \param hash_id RSA_RAW, RSA_MD{2,4,5} or RSA_SHA{1,256}
+ * \param hashlen message digest length (for RSA_RAW only)
+ * \param hash buffer holding the message digest
+ * \param sig buffer holding the ciphertext
+ *
+ * \return 0 if the verify operation was successful,
+ * or an POLARSSL_ERR_RSA_XXX error code
+ *
+ * \note The "sig" buffer must be as large as the size
+ * of ctx->N (eg. 128 bytes if RSA-1024 is used).
+ */
+int rsa_pkcs1_verify( rsa_context *ctx,
+ int mode,
+ int hash_id,
+ int hashlen,
+ unsigned char *hash,
+ unsigned char *sig );
+
+/**
+ * \brief Free the components of an RSA key
+ */
+void rsa_free( rsa_context *ctx );
+
+int rsa_parse_key( rsa_context *rsa, unsigned char *buf, int buflen,
+ unsigned char *pwd, int pwdlen );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* rsa.h */
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/sha1.c,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/*
+ * FIPS-180-1 compliant SHA-1 implementation
+ *
+ * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
+ *
+ * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+/*
+ * The SHA-1 standard was published by NIST in 1993.
+ *
+ * http://www.itl.nist.gov/fipspubs/fip180-1.htm
+ */
+
+#include "sha1.h"
+
+#include <string.h>
+#include <stdio.h>
+
+/*
+ * 32-bit integer manipulation macros (big endian)
+ */
+#ifndef GET_ULONG_BE
+#define GET_ULONG_BE(n,b,i) \
+{ \
+ (n) = ( (unsigned long) (b)[(i) ] << 24 ) \
+ | ( (unsigned long) (b)[(i) + 1] << 16 ) \
+ | ( (unsigned long) (b)[(i) + 2] << 8 ) \
+ | ( (unsigned long) (b)[(i) + 3] ); \
+}
+#endif
+
+#ifndef PUT_ULONG_BE
+#define PUT_ULONG_BE(n,b,i) \
+{ \
+ (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
+ (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
+ (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
+ (b)[(i) + 3] = (unsigned char) ( (n) ); \
+}
+#endif
+
+/*
+ * SHA-1 context setup
+ */
+void sha1_starts( sha1_context *ctx )
+{
+ ctx->total[0] = 0;
+ ctx->total[1] = 0;
+
+ ctx->state[0] = 0x67452301;
+ ctx->state[1] = 0xEFCDAB89;
+ ctx->state[2] = 0x98BADCFE;
+ ctx->state[3] = 0x10325476;
+ ctx->state[4] = 0xC3D2E1F0;
+}
+
+static void sha1_process( sha1_context *ctx, unsigned char data[64] )
+{
+ unsigned long temp, W[16], A, B, C, D, E;
+
+ GET_ULONG_BE( W[ 0], data, 0 );
+ GET_ULONG_BE( W[ 1], data, 4 );
+ GET_ULONG_BE( W[ 2], data, 8 );
+ GET_ULONG_BE( W[ 3], data, 12 );
+ GET_ULONG_BE( W[ 4], data, 16 );
+ GET_ULONG_BE( W[ 5], data, 20 );
+ GET_ULONG_BE( W[ 6], data, 24 );
+ GET_ULONG_BE( W[ 7], data, 28 );
+ GET_ULONG_BE( W[ 8], data, 32 );
+ GET_ULONG_BE( W[ 9], data, 36 );
+ GET_ULONG_BE( W[10], data, 40 );
+ GET_ULONG_BE( W[11], data, 44 );
+ GET_ULONG_BE( W[12], data, 48 );
+ GET_ULONG_BE( W[13], data, 52 );
+ GET_ULONG_BE( W[14], data, 56 );
+ GET_ULONG_BE( W[15], data, 60 );
+
+#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
+
+#define R(t) \
+( \
+ temp = W[(t - 3) & 0x0F] ^ W[(t - 8) & 0x0F] ^ \
+ W[(t - 14) & 0x0F] ^ W[ t & 0x0F], \
+ ( W[t & 0x0F] = S(temp,1) ) \
+)
+
+#define P(a,b,c,d,e,x) \
+{ \
+ e += S(a,5) + F(b,c,d) + K + x; b = S(b,30); \
+}
+
+ A = ctx->state[0];
+ B = ctx->state[1];
+ C = ctx->state[2];
+ D = ctx->state[3];
+ E = ctx->state[4];
+
+#define F(x,y,z) (z ^ (x & (y ^ z)))
+#define K 0x5A827999
+
+ P( A, B, C, D, E, W[0] );
+ P( E, A, B, C, D, W[1] );
+ P( D, E, A, B, C, W[2] );
+ P( C, D, E, A, B, W[3] );
+ P( B, C, D, E, A, W[4] );
+ P( A, B, C, D, E, W[5] );
+ P( E, A, B, C, D, W[6] );
+ P( D, E, A, B, C, W[7] );
+ P( C, D, E, A, B, W[8] );
+ P( B, C, D, E, A, W[9] );
+ P( A, B, C, D, E, W[10] );
+ P( E, A, B, C, D, W[11] );
+ P( D, E, A, B, C, W[12] );
+ P( C, D, E, A, B, W[13] );
+ P( B, C, D, E, A, W[14] );
+ P( A, B, C, D, E, W[15] );
+ P( E, A, B, C, D, R(16) );
+ P( D, E, A, B, C, R(17) );
+ P( C, D, E, A, B, R(18) );
+ P( B, C, D, E, A, R(19) );
+
+#undef K
+#undef F
+
+#define F(x,y,z) (x ^ y ^ z)
+#define K 0x6ED9EBA1
+
+ P( A, B, C, D, E, R(20) );
+ P( E, A, B, C, D, R(21) );
+ P( D, E, A, B, C, R(22) );
+ P( C, D, E, A, B, R(23) );
+ P( B, C, D, E, A, R(24) );
+ P( A, B, C, D, E, R(25) );
+ P( E, A, B, C, D, R(26) );
+ P( D, E, A, B, C, R(27) );
+ P( C, D, E, A, B, R(28) );
+ P( B, C, D, E, A, R(29) );
+ P( A, B, C, D, E, R(30) );
+ P( E, A, B, C, D, R(31) );
+ P( D, E, A, B, C, R(32) );
+ P( C, D, E, A, B, R(33) );
+ P( B, C, D, E, A, R(34) );
+ P( A, B, C, D, E, R(35) );
+ P( E, A, B, C, D, R(36) );
+ P( D, E, A, B, C, R(37) );
+ P( C, D, E, A, B, R(38) );
+ P( B, C, D, E, A, R(39) );
+
+#undef K
+#undef F
+
+#define F(x,y,z) ((x & y) | (z & (x | y)))
+#define K 0x8F1BBCDC
+
+ P( A, B, C, D, E, R(40) );
+ P( E, A, B, C, D, R(41) );
+ P( D, E, A, B, C, R(42) );
+ P( C, D, E, A, B, R(43) );
+ P( B, C, D, E, A, R(44) );
+ P( A, B, C, D, E, R(45) );
+ P( E, A, B, C, D, R(46) );
+ P( D, E, A, B, C, R(47) );
+ P( C, D, E, A, B, R(48) );
+ P( B, C, D, E, A, R(49) );
+ P( A, B, C, D, E, R(50) );
+ P( E, A, B, C, D, R(51) );
+ P( D, E, A, B, C, R(52) );
+ P( C, D, E, A, B, R(53) );
+ P( B, C, D, E, A, R(54) );
+ P( A, B, C, D, E, R(55) );
+ P( E, A, B, C, D, R(56) );
+ P( D, E, A, B, C, R(57) );
+ P( C, D, E, A, B, R(58) );
+ P( B, C, D, E, A, R(59) );
+
+#undef K
+#undef F
+
+#define F(x,y,z) (x ^ y ^ z)
+#define K 0xCA62C1D6
+
+ P( A, B, C, D, E, R(60) );
+ P( E, A, B, C, D, R(61) );
+ P( D, E, A, B, C, R(62) );
+ P( C, D, E, A, B, R(63) );
+ P( B, C, D, E, A, R(64) );
+ P( A, B, C, D, E, R(65) );
+ P( E, A, B, C, D, R(66) );
+ P( D, E, A, B, C, R(67) );
+ P( C, D, E, A, B, R(68) );
+ P( B, C, D, E, A, R(69) );
+ P( A, B, C, D, E, R(70) );
+ P( E, A, B, C, D, R(71) );
+ P( D, E, A, B, C, R(72) );
+ P( C, D, E, A, B, R(73) );
+ P( B, C, D, E, A, R(74) );
+ P( A, B, C, D, E, R(75) );
+ P( E, A, B, C, D, R(76) );
+ P( D, E, A, B, C, R(77) );
+ P( C, D, E, A, B, R(78) );
+ P( B, C, D, E, A, R(79) );
+
+#undef K
+#undef F
+
+ ctx->state[0] += A;
+ ctx->state[1] += B;
+ ctx->state[2] += C;
+ ctx->state[3] += D;
+ ctx->state[4] += E;
+}
+
+/*
+ * SHA-1 process buffer
+ */
+void sha1_update( sha1_context *ctx, unsigned char *input, int ilen )
+{
+ int fill;
+ unsigned long left;
+
+ if( ilen <= 0 )
+ return;
+
+ left = ctx->total[0] & 0x3F;
+ fill = 64 - left;
+
+ ctx->total[0] += ilen;
+ ctx->total[0] &= 0xFFFFFFFF;
+
+ if( ctx->total[0] < (unsigned long) ilen )
+ ctx->total[1]++;
+
+ if( left && ilen >= fill )
+ {
+ memcpy( (void *) (ctx->buffer + left),
+ (void *) input, fill );
+ sha1_process( ctx, ctx->buffer );
+ input += fill;
+ ilen -= fill;
+ left = 0;
+ }
+
+ while( ilen >= 64 )
+ {
+ sha1_process( ctx, input );
+ input += 64;
+ ilen -= 64;
+ }
+
+ if( ilen > 0 )
+ {
+ memcpy( (void *) (ctx->buffer + left),
+ (void *) input, ilen );
+ }
+}
+
+static const unsigned char sha1_padding[64] =
+{
+ 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+/*
+ * SHA-1 final digest
+ */
+void sha1_finish( sha1_context *ctx, unsigned char output[20] )
+{
+ unsigned long last, padn;
+ unsigned long high, low;
+ unsigned char msglen[8];
+
+ high = ( ctx->total[0] >> 29 )
+ | ( ctx->total[1] << 3 );
+ low = ( ctx->total[0] << 3 );
+
+ PUT_ULONG_BE( high, msglen, 0 );
+ PUT_ULONG_BE( low, msglen, 4 );
+
+ last = ctx->total[0] & 0x3F;
+ padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
+
+ sha1_update( ctx, (unsigned char *) sha1_padding, padn );
+ sha1_update( ctx, msglen, 8 );
+
+ PUT_ULONG_BE( ctx->state[0], output, 0 );
+ PUT_ULONG_BE( ctx->state[1], output, 4 );
+ PUT_ULONG_BE( ctx->state[2], output, 8 );
+ PUT_ULONG_BE( ctx->state[3], output, 12 );
+ PUT_ULONG_BE( ctx->state[4], output, 16 );
+}
+
+/*
+ * output = SHA-1( input buffer )
+ */
+void sha1( unsigned char *input, int ilen, unsigned char output[20] )
+{
+ sha1_context ctx;
+
+ sha1_starts( &ctx );
+ sha1_update( &ctx, input, ilen );
+ sha1_finish( &ctx, output );
+
+ memset( &ctx, 0, sizeof( sha1_context ) );
+}
+
+/*
+ * output = SHA-1( file contents )
+ */
+int sha1_file( char *path, unsigned char output[20] )
+{
+ FILE *f;
+ size_t n;
+ sha1_context ctx;
+ unsigned char buf[1024];
+
+ if( ( f = fopen( path, "rb" ) ) == NULL )
+ return( 1 );
+
+ sha1_starts( &ctx );
+
+ while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
+ sha1_update( &ctx, buf, (int) n );
+
+ sha1_finish( &ctx, output );
+
+ memset( &ctx, 0, sizeof( sha1_context ) );
+
+ if( ferror( f ) != 0 )
+ {
+ fclose( f );
+ return( 2 );
+ }
+
+ fclose( f );
+ return( 0 );
+}
+
+/*
+ * SHA-1 HMAC context setup
+ */
+void sha1_hmac_starts( sha1_context *ctx, unsigned char *key, int keylen )
+{
+ int i;
+ unsigned char sum[20];
+
+ if( keylen > 64 )
+ {
+ sha1( key, keylen, sum );
+ keylen = 20;
+ key = sum;
+ }
+
+ memset( ctx->ipad, 0x36, 64 );
+ memset( ctx->opad, 0x5C, 64 );
+
+ for( i = 0; i < keylen; i++ )
+ {
+ ctx->ipad[i] = (unsigned char)( ctx->ipad[i] ^ key[i] );
+ ctx->opad[i] = (unsigned char)( ctx->opad[i] ^ key[i] );
+ }
+
+ sha1_starts( ctx );
+ sha1_update( ctx, ctx->ipad, 64 );
+
+ memset( sum, 0, sizeof( sum ) );
+}
+
+/*
+ * SHA-1 HMAC process buffer
+ */
+void sha1_hmac_update( sha1_context *ctx, unsigned char *input, int ilen )
+{
+ sha1_update( ctx, input, ilen );
+}
+
+/*
+ * SHA-1 HMAC final digest
+ */
+void sha1_hmac_finish( sha1_context *ctx, unsigned char output[20] )
+{
+ unsigned char tmpbuf[20];
+
+ sha1_finish( ctx, tmpbuf );
+ sha1_starts( ctx );
+ sha1_update( ctx, ctx->opad, 64 );
+ sha1_update( ctx, tmpbuf, 20 );
+ sha1_finish( ctx, output );
+
+ memset( tmpbuf, 0, sizeof( tmpbuf ) );
+}
+
+/*
+ * output = HMAC-SHA-1( hmac key, input buffer )
+ */
+void sha1_hmac( unsigned char *key, int keylen,
+ unsigned char *input, int ilen,
+ unsigned char output[20] )
+{
+ sha1_context ctx;
+
+ sha1_hmac_starts( &ctx, key, keylen );
+ sha1_hmac_update( &ctx, input, ilen );
+ sha1_hmac_finish( &ctx, output );
+
+ memset( &ctx, 0, sizeof( sha1_context ) );
+}
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/sha1.h,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/**
+ * \file sha1.h
+ *
+ * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
+ *
+ * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef POLARSSL_SHA1_H
+#define POLARSSL_SHA1_H
+
+/**
+ * \brief SHA-1 context structure
+ */
+typedef struct
+{
+ unsigned long total[2]; /*!< number of bytes processed */
+ unsigned long state[5]; /*!< intermediate digest state */
+ unsigned char buffer[64]; /*!< data block being processed */
+
+ unsigned char ipad[64]; /*!< HMAC: inner padding */
+ unsigned char opad[64]; /*!< HMAC: outer padding */
+}
+sha1_context;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief SHA-1 context setup
+ *
+ * \param ctx context to be initialized
+ */
+void sha1_starts( sha1_context *ctx );
+
+/**
+ * \brief SHA-1 process buffer
+ *
+ * \param ctx SHA-1 context
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ */
+void sha1_update( sha1_context *ctx, unsigned char *input, int ilen );
+
+/**
+ * \brief SHA-1 final digest
+ *
+ * \param ctx SHA-1 context
+ * \param output SHA-1 checksum result
+ */
+void sha1_finish( sha1_context *ctx, unsigned char output[20] );
+
+/**
+ * \brief Output = SHA-1( input buffer )
+ *
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ * \param output SHA-1 checksum result
+ */
+void sha1( unsigned char *input, int ilen, unsigned char output[20] );
+
+/**
+ * \brief Output = SHA-1( file contents )
+ *
+ * \param path input file name
+ * \param output SHA-1 checksum result
+ *
+ * \return 0 if successful, 1 if fopen failed,
+ * or 2 if fread failed
+ */
+int sha1_file( char *path, unsigned char output[20] );
+
+/**
+ * \brief SHA-1 HMAC context setup
+ *
+ * \param ctx HMAC context to be initialized
+ * \param key HMAC secret key
+ * \param keylen length of the HMAC key
+ */
+void sha1_hmac_starts( sha1_context *ctx, unsigned char *key, int keylen );
+
+/**
+ * \brief SHA-1 HMAC process buffer
+ *
+ * \param ctx HMAC context
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ */
+void sha1_hmac_update( sha1_context *ctx, unsigned char *input, int ilen );
+
+/**
+ * \brief SHA-1 HMAC final digest
+ *
+ * \param ctx HMAC context
+ * \param output SHA-1 HMAC checksum result
+ */
+void sha1_hmac_finish( sha1_context *ctx, unsigned char output[20] );
+
+/**
+ * \brief Output = HMAC-SHA-1( hmac key, input buffer )
+ *
+ * \param key HMAC secret key
+ * \param keylen length of the HMAC key
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ * \param output HMAC-SHA-1 result
+ */
+void sha1_hmac( unsigned char *key, int keylen,
+ unsigned char *input, int ilen,
+ unsigned char output[20] );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* sha1.h */
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/sha2.c,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/*
+ * FIPS-180-2 compliant SHA-256 implementation
+ *
+ * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
+ *
+ * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+/*
+ * The SHA-256 Secure Hash Standard was published by NIST in 2002.
+ *
+ * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
+ */
+
+#include "sha2.h"
+
+#include <string.h>
+#include <stdio.h>
+
+/*
+ * 32-bit integer manipulation macros (big endian)
+ */
+#ifndef GET_ULONG_BE
+#define GET_ULONG_BE(n,b,i) \
+{ \
+ (n) = ( (unsigned long) (b)[(i) ] << 24 ) \
+ | ( (unsigned long) (b)[(i) + 1] << 16 ) \
+ | ( (unsigned long) (b)[(i) + 2] << 8 ) \
+ | ( (unsigned long) (b)[(i) + 3] ); \
+}
+#endif
+
+#ifndef PUT_ULONG_BE
+#define PUT_ULONG_BE(n,b,i) \
+{ \
+ (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
+ (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
+ (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
+ (b)[(i) + 3] = (unsigned char) ( (n) ); \
+}
+#endif
+
+/*
+ * SHA-256 context setup
+ */
+void sha2_starts( sha2_context *ctx, int is224 )
+{
+ ctx->total[0] = 0;
+ ctx->total[1] = 0;
+
+ if( is224 == 0 )
+ {
+ /* SHA-256 */
+ ctx->state[0] = 0x6A09E667;
+ ctx->state[1] = 0xBB67AE85;
+ ctx->state[2] = 0x3C6EF372;
+ ctx->state[3] = 0xA54FF53A;
+ ctx->state[4] = 0x510E527F;
+ ctx->state[5] = 0x9B05688C;
+ ctx->state[6] = 0x1F83D9AB;
+ ctx->state[7] = 0x5BE0CD19;
+ }
+ else
+ {
+ /* SHA-224 */
+ ctx->state[0] = 0xC1059ED8;
+ ctx->state[1] = 0x367CD507;
+ ctx->state[2] = 0x3070DD17;
+ ctx->state[3] = 0xF70E5939;
+ ctx->state[4] = 0xFFC00B31;
+ ctx->state[5] = 0x68581511;
+ ctx->state[6] = 0x64F98FA7;
+ ctx->state[7] = 0xBEFA4FA4;
+ }
+
+ ctx->is224 = is224;
+}
+
+static void sha2_process( sha2_context *ctx, unsigned char data[64] )
+{
+ unsigned long temp1, temp2, W[64];
+ unsigned long A, B, C, D, E, F, G, H;
+
+ GET_ULONG_BE( W[ 0], data, 0 );
+ GET_ULONG_BE( W[ 1], data, 4 );
+ GET_ULONG_BE( W[ 2], data, 8 );
+ GET_ULONG_BE( W[ 3], data, 12 );
+ GET_ULONG_BE( W[ 4], data, 16 );
+ GET_ULONG_BE( W[ 5], data, 20 );
+ GET_ULONG_BE( W[ 6], data, 24 );
+ GET_ULONG_BE( W[ 7], data, 28 );
+ GET_ULONG_BE( W[ 8], data, 32 );
+ GET_ULONG_BE( W[ 9], data, 36 );
+ GET_ULONG_BE( W[10], data, 40 );
+ GET_ULONG_BE( W[11], data, 44 );
+ GET_ULONG_BE( W[12], data, 48 );
+ GET_ULONG_BE( W[13], data, 52 );
+ GET_ULONG_BE( W[14], data, 56 );
+ GET_ULONG_BE( W[15], data, 60 );
+
+#define SHR(x,n) ((x & 0xFFFFFFFF) >> n)
+#define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))
+
+#define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
+#define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
+
+#define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
+#define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
+
+#define F0(x,y,z) ((x & y) | (z & (x | y)))
+#define F1(x,y,z) (z ^ (x & (y ^ z)))
+
+#define R(t) \
+( \
+ W[t] = S1(W[t - 2]) + W[t - 7] + \
+ S0(W[t - 15]) + W[t - 16] \
+)
+
+#define P(a,b,c,d,e,f,g,h,x,K) \
+{ \
+ temp1 = h + S3(e) + F1(e,f,g) + K + x; \
+ temp2 = S2(a) + F0(a,b,c); \
+ d += temp1; h = temp1 + temp2; \
+}
+
+ A = ctx->state[0];
+ B = ctx->state[1];
+ C = ctx->state[2];
+ D = ctx->state[3];
+ E = ctx->state[4];
+ F = ctx->state[5];
+ G = ctx->state[6];
+ H = ctx->state[7];
+
+ P( A, B, C, D, E, F, G, H, W[ 0], 0x428A2F98 );
+ P( H, A, B, C, D, E, F, G, W[ 1], 0x71374491 );
+ P( G, H, A, B, C, D, E, F, W[ 2], 0xB5C0FBCF );
+ P( F, G, H, A, B, C, D, E, W[ 3], 0xE9B5DBA5 );
+ P( E, F, G, H, A, B, C, D, W[ 4], 0x3956C25B );
+ P( D, E, F, G, H, A, B, C, W[ 5], 0x59F111F1 );
+ P( C, D, E, F, G, H, A, B, W[ 6], 0x923F82A4 );
+ P( B, C, D, E, F, G, H, A, W[ 7], 0xAB1C5ED5 );
+ P( A, B, C, D, E, F, G, H, W[ 8], 0xD807AA98 );
+ P( H, A, B, C, D, E, F, G, W[ 9], 0x12835B01 );
+ P( G, H, A, B, C, D, E, F, W[10], 0x243185BE );
+ P( F, G, H, A, B, C, D, E, W[11], 0x550C7DC3 );
+ P( E, F, G, H, A, B, C, D, W[12], 0x72BE5D74 );
+ P( D, E, F, G, H, A, B, C, W[13], 0x80DEB1FE );
+ P( C, D, E, F, G, H, A, B, W[14], 0x9BDC06A7 );
+ P( B, C, D, E, F, G, H, A, W[15], 0xC19BF174 );
+ P( A, B, C, D, E, F, G, H, R(16), 0xE49B69C1 );
+ P( H, A, B, C, D, E, F, G, R(17), 0xEFBE4786 );
+ P( G, H, A, B, C, D, E, F, R(18), 0x0FC19DC6 );
+ P( F, G, H, A, B, C, D, E, R(19), 0x240CA1CC );
+ P( E, F, G, H, A, B, C, D, R(20), 0x2DE92C6F );
+ P( D, E, F, G, H, A, B, C, R(21), 0x4A7484AA );
+ P( C, D, E, F, G, H, A, B, R(22), 0x5CB0A9DC );
+ P( B, C, D, E, F, G, H, A, R(23), 0x76F988DA );
+ P( A, B, C, D, E, F, G, H, R(24), 0x983E5152 );
+ P( H, A, B, C, D, E, F, G, R(25), 0xA831C66D );
+ P( G, H, A, B, C, D, E, F, R(26), 0xB00327C8 );
+ P( F, G, H, A, B, C, D, E, R(27), 0xBF597FC7 );
+ P( E, F, G, H, A, B, C, D, R(28), 0xC6E00BF3 );
+ P( D, E, F, G, H, A, B, C, R(29), 0xD5A79147 );
+ P( C, D, E, F, G, H, A, B, R(30), 0x06CA6351 );
+ P( B, C, D, E, F, G, H, A, R(31), 0x14292967 );
+ P( A, B, C, D, E, F, G, H, R(32), 0x27B70A85 );
+ P( H, A, B, C, D, E, F, G, R(33), 0x2E1B2138 );
+ P( G, H, A, B, C, D, E, F, R(34), 0x4D2C6DFC );
+ P( F, G, H, A, B, C, D, E, R(35), 0x53380D13 );
+ P( E, F, G, H, A, B, C, D, R(36), 0x650A7354 );
+ P( D, E, F, G, H, A, B, C, R(37), 0x766A0ABB );
+ P( C, D, E, F, G, H, A, B, R(38), 0x81C2C92E );
+ P( B, C, D, E, F, G, H, A, R(39), 0x92722C85 );
+ P( A, B, C, D, E, F, G, H, R(40), 0xA2BFE8A1 );
+ P( H, A, B, C, D, E, F, G, R(41), 0xA81A664B );
+ P( G, H, A, B, C, D, E, F, R(42), 0xC24B8B70 );
+ P( F, G, H, A, B, C, D, E, R(43), 0xC76C51A3 );
+ P( E, F, G, H, A, B, C, D, R(44), 0xD192E819 );
+ P( D, E, F, G, H, A, B, C, R(45), 0xD6990624 );
+ P( C, D, E, F, G, H, A, B, R(46), 0xF40E3585 );
+ P( B, C, D, E, F, G, H, A, R(47), 0x106AA070 );
+ P( A, B, C, D, E, F, G, H, R(48), 0x19A4C116 );
+ P( H, A, B, C, D, E, F, G, R(49), 0x1E376C08 );
+ P( G, H, A, B, C, D, E, F, R(50), 0x2748774C );
+ P( F, G, H, A, B, C, D, E, R(51), 0x34B0BCB5 );
+ P( E, F, G, H, A, B, C, D, R(52), 0x391C0CB3 );
+ P( D, E, F, G, H, A, B, C, R(53), 0x4ED8AA4A );
+ P( C, D, E, F, G, H, A, B, R(54), 0x5B9CCA4F );
+ P( B, C, D, E, F, G, H, A, R(55), 0x682E6FF3 );
+ P( A, B, C, D, E, F, G, H, R(56), 0x748F82EE );
+ P( H, A, B, C, D, E, F, G, R(57), 0x78A5636F );
+ P( G, H, A, B, C, D, E, F, R(58), 0x84C87814 );
+ P( F, G, H, A, B, C, D, E, R(59), 0x8CC70208 );
+ P( E, F, G, H, A, B, C, D, R(60), 0x90BEFFFA );
+ P( D, E, F, G, H, A, B, C, R(61), 0xA4506CEB );
+ P( C, D, E, F, G, H, A, B, R(62), 0xBEF9A3F7 );
+ P( B, C, D, E, F, G, H, A, R(63), 0xC67178F2 );
+
+ ctx->state[0] += A;
+ ctx->state[1] += B;
+ ctx->state[2] += C;
+ ctx->state[3] += D;
+ ctx->state[4] += E;
+ ctx->state[5] += F;
+ ctx->state[6] += G;
+ ctx->state[7] += H;
+}
+
+/*
+ * SHA-256 process buffer
+ */
+void sha2_update( sha2_context *ctx, unsigned char *input, int ilen )
+{
+ int fill;
+ unsigned long left;
+
+ if( ilen <= 0 )
+ return;
+
+ left = ctx->total[0] & 0x3F;
+ fill = 64 - left;
+
+ ctx->total[0] += ilen;
+ ctx->total[0] &= 0xFFFFFFFF;
+
+ if( ctx->total[0] < (unsigned long) ilen )
+ ctx->total[1]++;
+
+ if( left && ilen >= fill )
+ {
+ memcpy( (void *) (ctx->buffer + left),
+ (void *) input, fill );
+ sha2_process( ctx, ctx->buffer );
+ input += fill;
+ ilen -= fill;
+ left = 0;
+ }
+
+ while( ilen >= 64 )
+ {
+ sha2_process( ctx, input );
+ input += 64;
+ ilen -= 64;
+ }
+
+ if( ilen > 0 )
+ {
+ memcpy( (void *) (ctx->buffer + left),
+ (void *) input, ilen );
+ }
+}
+
+static const unsigned char sha2_padding[64] =
+{
+ 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+/*
+ * SHA-256 final digest
+ */
+void sha2_finish( sha2_context *ctx, unsigned char output[32] )
+{
+ unsigned long last, padn;
+ unsigned long high, low;
+ unsigned char msglen[8];
+
+ high = ( ctx->total[0] >> 29 )
+ | ( ctx->total[1] << 3 );
+ low = ( ctx->total[0] << 3 );
+
+ PUT_ULONG_BE( high, msglen, 0 );
+ PUT_ULONG_BE( low, msglen, 4 );
+
+ last = ctx->total[0] & 0x3F;
+ padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
+
+ sha2_update( ctx, (unsigned char *) sha2_padding, padn );
+ sha2_update( ctx, msglen, 8 );
+
+ PUT_ULONG_BE( ctx->state[0], output, 0 );
+ PUT_ULONG_BE( ctx->state[1], output, 4 );
+ PUT_ULONG_BE( ctx->state[2], output, 8 );
+ PUT_ULONG_BE( ctx->state[3], output, 12 );
+ PUT_ULONG_BE( ctx->state[4], output, 16 );
+ PUT_ULONG_BE( ctx->state[5], output, 20 );
+ PUT_ULONG_BE( ctx->state[6], output, 24 );
+
+ if( ctx->is224 == 0 )
+ PUT_ULONG_BE( ctx->state[7], output, 28 );
+}
+
+/*
+ * output = SHA-256( input buffer )
+ */
+void sha2( unsigned char *input, int ilen,
+ unsigned char output[32], int is224 )
+{
+ sha2_context ctx;
+
+ sha2_starts( &ctx, is224 );
+ sha2_update( &ctx, input, ilen );
+ sha2_finish( &ctx, output );
+
+ memset( &ctx, 0, sizeof( sha2_context ) );
+}
+
+/*
+ * output = SHA-256( file contents )
+ */
+int sha2_file( char *path, unsigned char output[32], int is224 )
+{
+ FILE *f;
+ size_t n;
+ sha2_context ctx;
+ unsigned char buf[1024];
+
+ if( ( f = fopen( path, "rb" ) ) == NULL )
+ return( 1 );
+
+ sha2_starts( &ctx, is224 );
+
+ while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
+ sha2_update( &ctx, buf, (int) n );
+
+ sha2_finish( &ctx, output );
+
+ memset( &ctx, 0, sizeof( sha2_context ) );
+
+ if( ferror( f ) != 0 )
+ {
+ fclose( f );
+ return( 2 );
+ }
+
+ fclose( f );
+ return( 0 );
+}
+
+/*
+ * SHA-256 HMAC context setup
+ */
+void sha2_hmac_starts( sha2_context *ctx, unsigned char *key, int keylen,
+ int is224 )
+{
+ int i;
+ unsigned char sum[32];
+
+ if( keylen > 64 )
+ {
+ sha2( key, keylen, sum, is224 );
+ keylen = ( is224 ) ? 28 : 32;
+ key = sum;
+ }
+
+ memset( ctx->ipad, 0x36, 64 );
+ memset( ctx->opad, 0x5C, 64 );
+
+ for( i = 0; i < keylen; i++ )
+ {
+ ctx->ipad[i] = (unsigned char)( ctx->ipad[i] ^ key[i] );
+ ctx->opad[i] = (unsigned char)( ctx->opad[i] ^ key[i] );
+ }
+
+ sha2_starts( ctx, is224 );
+ sha2_update( ctx, ctx->ipad, 64 );
+
+ memset( sum, 0, sizeof( sum ) );
+}
+
+/*
+ * SHA-256 HMAC process buffer
+ */
+void sha2_hmac_update( sha2_context *ctx, unsigned char *input, int ilen )
+{
+ sha2_update( ctx, input, ilen );
+}
+
+/*
+ * SHA-256 HMAC final digest
+ */
+void sha2_hmac_finish( sha2_context *ctx, unsigned char output[32] )
+{
+ int is224, hlen;
+ unsigned char tmpbuf[32];
+
+ is224 = ctx->is224;
+ hlen = ( is224 == 0 ) ? 32 : 28;
+
+ sha2_finish( ctx, tmpbuf );
+ sha2_starts( ctx, is224 );
+ sha2_update( ctx, ctx->opad, 64 );
+ sha2_update( ctx, tmpbuf, hlen );
+ sha2_finish( ctx, output );
+
+ memset( tmpbuf, 0, sizeof( tmpbuf ) );
+}
+
+/*
+ * output = HMAC-SHA-256( hmac key, input buffer )
+ */
+void sha2_hmac( unsigned char *key, int keylen,
+ unsigned char *input, int ilen,
+ unsigned char output[32], int is224 )
+{
+ sha2_context ctx;
+
+ sha2_hmac_starts( &ctx, key, keylen, is224 );
+ sha2_hmac_update( &ctx, input, ilen );
+ sha2_hmac_finish( &ctx, output );
+
+ memset( &ctx, 0, sizeof( sha2_context ) );
+}
--- /dev/null
+/* $Cambridge: exim/src/src/pdkim/sha2.h,v 1.1.2.1 2009/02/24 13:13:47 tom Exp $ */
+/**
+ * \file sha2.h
+ *
+ * Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
+ *
+ * Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef POLARSSL_SHA2_H
+#define POLARSSL_SHA2_H
+
+/**
+ * \brief SHA-256 context structure
+ */
+typedef struct
+{
+ unsigned long total[2]; /*!< number of bytes processed */
+ unsigned long state[8]; /*!< intermediate digest state */
+ unsigned char buffer[64]; /*!< data block being processed */
+
+ unsigned char ipad[64]; /*!< HMAC: inner padding */
+ unsigned char opad[64]; /*!< HMAC: outer padding */
+ int is224; /*!< 0 => SHA-256, else SHA-224 */
+}
+sha2_context;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief SHA-256 context setup
+ *
+ * \param ctx context to be initialized
+ * \param is224 0 = use SHA256, 1 = use SHA224
+ */
+void sha2_starts( sha2_context *ctx, int is224 );
+
+/**
+ * \brief SHA-256 process buffer
+ *
+ * \param ctx SHA-256 context
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ */
+void sha2_update( sha2_context *ctx, unsigned char *input, int ilen );
+
+/**
+ * \brief SHA-256 final digest
+ *
+ * \param ctx SHA-256 context
+ * \param output SHA-224/256 checksum result
+ */
+void sha2_finish( sha2_context *ctx, unsigned char output[32] );
+
+/**
+ * \brief Output = SHA-256( input buffer )
+ *
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ * \param output SHA-224/256 checksum result
+ * \param is224 0 = use SHA256, 1 = use SHA224
+ */
+void sha2( unsigned char *input, int ilen,
+ unsigned char output[32], int is224 );
+
+/**
+ * \brief Output = SHA-256( file contents )
+ *
+ * \param path input file name
+ * \param output SHA-224/256 checksum result
+ * \param is224 0 = use SHA256, 1 = use SHA224
+ *
+ * \return 0 if successful, 1 if fopen failed,
+ * or 2 if fread failed
+ */
+int sha2_file( char *path, unsigned char output[32], int is224 );
+
+/**
+ * \brief SHA-256 HMAC context setup
+ *
+ * \param ctx HMAC context to be initialized
+ * \param key HMAC secret key
+ * \param keylen length of the HMAC key
+ * \param is224 0 = use SHA256, 1 = use SHA224
+ */
+void sha2_hmac_starts( sha2_context *ctx, unsigned char *key, int keylen,
+ int is224 );
+
+/**
+ * \brief SHA-256 HMAC process buffer
+ *
+ * \param ctx HMAC context
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ */
+void sha2_hmac_update( sha2_context *ctx, unsigned char *input, int ilen );
+
+/**
+ * \brief SHA-256 HMAC final digest
+ *
+ * \param ctx HMAC context
+ * \param output SHA-224/256 HMAC checksum result
+ */
+void sha2_hmac_finish( sha2_context *ctx, unsigned char output[32] );
+
+/**
+ * \brief Output = HMAC-SHA-256( hmac key, input buffer )
+ *
+ * \param key HMAC secret key
+ * \param keylen length of the HMAC key
+ * \param input buffer holding the data
+ * \param ilen length of the input data
+ * \param output HMAC-SHA-224/256 result
+ * \param is224 0 = use SHA256, 1 = use SHA224
+ */
+void sha2_hmac( unsigned char *key, int keylen,
+ unsigned char *input, int ilen,
+ unsigned char output[32], int is224 );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* sha2.h */
git://git.exim.org / users / jgh / exim.git / commitdiff