-/**
- * \file rsa.h
- *
- * Copyright (C) 2006-2010, Brainspark B.V.
- *
- * This file is part of PolarSSL (http://www.polarssl.org)
- * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
- *
- * All rights reserved.
- *
- * 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.
- */
-
-/* $Cambridge: exim/src/src/pdkim/rsa.h,v 1.3 2009/12/07 13:05:07 tom Exp $ */
-
-#ifndef POLARSSL_RSA_H
-#define POLARSSL_RSA_H
-
-#include "bignum.h"
-
-/*
- * RSA Error codes
- */
-#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_TOO_LARGE -0x0470
-#define POLARSSL_ERR_RSA_RNG_FAILED -0x0480
-
-/* *************** begin copy from x509.h ************************/
-/*
- * ASN1 Error codes
- *
- * These error codes will be OR'ed to X509 error codes for
- * higher error granularity.
- */
-#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
-
-/*
- * X509 Error codes
- */
-#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_GENERALIZED_TIME 0x18
-#define ASN1_UNIVERSAL_STRING 0x1C
-#define ASN1_BMP_STRING 0x1E
-#define ASN1_PRIMITIVE 0x00
-#define ASN1_CONSTRUCTED 0x20
-#define ASN1_CONTEXT_SPECIFIC 0x80
-/* *************** end copy from x509.h ************************/
-
-/*
- * PKCS#1 constants
- */
-#define SIG_RSA_RAW 0
-#define SIG_RSA_MD2 2
-#define SIG_RSA_MD4 3
-#define SIG_RSA_MD5 4
-#define SIG_RSA_SHA1 5
-#define SIG_RSA_SHA224 14
-#define SIG_RSA_SHA256 11
-#define SIG_RSA_SHA384 12
-#define SIG_RSA_SHA512 13
-
-#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
-
-#define ASN1_STR_CONSTRUCTED_SEQUENCE "\x30"
-#define ASN1_STR_NULL "\x05"
-#define ASN1_STR_OID "\x06"
-#define ASN1_STR_OCTET_STRING "\x04"
-
-#define OID_DIGEST_ALG_MDX "\x2A\x86\x48\x86\xF7\x0D\x02\x00"
-#define OID_HASH_ALG_SHA1 "\x2b\x0e\x03\x02\x1a"
-#define OID_HASH_ALG_SHA2X "\x60\x86\x48\x01\x65\x03\x04\x02\x00"
-
-#define OID_ISO_MEMBER_BODIES "\x2a"
-#define OID_ISO_IDENTIFIED_ORG "\x2b"
-
/*
- * ISO Member bodies OID parts
- */
-#define OID_COUNTRY_US "\x86\x48"
-#define OID_RSA_DATA_SECURITY "\x86\xf7\x0d"
-
-/*
- * ISO Identified organization OID parts
- */
-#define OID_OIW_SECSIG_SHA1 "\x0e\x03\x02\x1a"
-
-/*
- * DigestInfo ::= SEQUENCE {
- * digestAlgorithm DigestAlgorithmIdentifier,
- * digest Digest }
+ * PDKIM - a RFC4871 (DKIM) implementation
*
- * DigestAlgorithmIdentifier ::= AlgorithmIdentifier
+ * Copyright (C) 2016 Exim maintainers
*
- * Digest ::= OCTET STRING
+ * RSA signing/verification interface
*/
-#define ASN1_HASH_MDX \
-( \
- ASN1_STR_CONSTRUCTED_SEQUENCE "\x20" \
- ASN1_STR_CONSTRUCTED_SEQUENCE "\x0C" \
- ASN1_STR_OID "\x08" \
- OID_DIGEST_ALG_MDX \
- ASN1_STR_NULL "\x00" \
- ASN1_STR_OCTET_STRING "\x10" \
-)
-
-#define ASN1_HASH_SHA1 \
- ASN1_STR_CONSTRUCTED_SEQUENCE "\x21" \
- ASN1_STR_CONSTRUCTED_SEQUENCE "\x09" \
- ASN1_STR_OID "\x05" \
- OID_HASH_ALG_SHA1 \
- ASN1_STR_NULL "\x00" \
- ASN1_STR_OCTET_STRING "\x14"
-
-#define ASN1_HASH_SHA2X \
- ASN1_STR_CONSTRUCTED_SEQUENCE "\x11" \
- ASN1_STR_CONSTRUCTED_SEQUENCE "\x0d" \
- ASN1_STR_OID "\x09" \
- OID_HASH_ALG_SHA2X \
- ASN1_STR_NULL "\x00" \
- ASN1_STR_OCTET_STRING "\x00"
-
-/**
- * \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) */
+#include "../exim.h"
- mpi RN; /*!< cached R^2 mod N */
- mpi RP; /*!< cached R^2 mod P */
- mpi RQ; /*!< cached R^2 mod Q */
+#ifndef DISABLE_DKIM /* entire file */
- int padding; /*!< 1.5 or OAEP/PSS */
- int hash_id; /*!< hash identifier */
-}
-rsa_context;
+#include "crypt_ver.h"
-#ifdef __cplusplus
-extern "C" {
+#ifdef RSA_OPENSSL
+# include <openssl/rsa.h>
+# include <openssl/ssl.h>
+# include <openssl/err.h>
+#elif defined(RSA_GNUTLS)
+# include <gnutls/gnutls.h>
+# include <gnutls/x509.h>
+# include <gnutls/abstract.h>
+#elif defined(RSA_GCRYPT)
+# include <gcrypt.h>
+# include <libtasn1.h>
#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
- *
- * \note The hash_id parameter is actually ignored
- * when using RSA_PKCS_V15 padding.
- *
- * \note Currently, RSA_PKCS_V21 padding
- * is not supported.
- */
-void rsa_init( rsa_context *ctx,
- int padding,
- int hash_id);
+#include "../blob.h"
-/**
- * \brief Generate an RSA keypair
- *
- * \param ctx RSA context that will hold the key
- * \param f_rng RNG function
- * \param p_rng RNG parameter
- * \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.
- *
- * \return 0 if successful, or an POLARSSL_ERR_RSA_XXX error code
- */
-int rsa_gen_key( rsa_context *ctx,
- int (*f_rng)(void *),
- void *p_rng,
- 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( const rsa_context *ctx );
+#ifdef RSA_OPENSSL
-/**
- * \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( const rsa_context *ctx );
+typedef struct {
+ RSA * rsa;
+} es_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 or assure that
- * input is smaller than N.
- *
- * \note The input and output buffers must be large
- * enough (eg. 128 bytes if RSA-1024 is used).
- */
-int rsa_public( rsa_context *ctx,
- const unsigned char *input,
- unsigned char *output );
+typedef struct {
+ RSA * rsa;
+} ev_ctx;
-/**
- * \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,
- const unsigned char *input,
- unsigned char *output );
+#elif defined(RSA_GNUTLS)
-/**
- * \brief Add the message padding, then do an RSA operation
- *
- * \param ctx RSA context
- * \param f_rng RNG function
- * \param p_rng RNG parameter
- * \param mode RSA_PUBLIC or RSA_PRIVATE
- * \param ilen contains 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 (*f_rng)(void *),
- void *p_rng,
- int mode, int ilen,
- const unsigned char *input,
- unsigned char *output );
+typedef struct {
+ gnutls_x509_privkey_t rsa;
+} es_ctx;
-/**
- * \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,
- const unsigned char *input,
- unsigned char *output,
- int output_max_len );
+typedef struct {
+ gnutls_pubkey_t rsa;
+} ev_ctx;
-/**
- * \brief Do a private RSA to sign a message digest
- *
- * \param ctx RSA context
- * \param mode RSA_PUBLIC or RSA_PRIVATE
- * \param hash_id SIG_RSA_RAW, SIG_RSA_MD{2,4,5} or SIG_RSA_SHA{1,224,256,384,512}
- * \param hashlen message digest length (for SIG_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,
- const unsigned char *hash,
- unsigned char *sig );
+#elif defined(RSA_GCRYPT)
-/**
- * \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 SIG_RSA_RAW, SIG_RSA_MD{2,4,5} or SIG_RSA_SHA{1,224,256,384,512}
- * \param hashlen message digest length (for SIG_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,
- const unsigned char *hash,
- unsigned char *sig );
+typedef struct {
+ gcry_mpi_t n;
+ gcry_mpi_t e;
+ gcry_mpi_t d;
+ gcry_mpi_t p;
+ gcry_mpi_t q;
+ gcry_mpi_t dp;
+ gcry_mpi_t dq;
+ gcry_mpi_t qp;
+} es_ctx;
-/**
- * \brief Free the components of an RSA key
- *
- * \param ctx RSA Context to free
- */
-void rsa_free( rsa_context *ctx );
+typedef struct {
+ gcry_mpi_t n;
+ gcry_mpi_t e;
+} ev_ctx;
-/* PDKIM declarations (not part of polarssl) */
-int rsa_parse_public_key( rsa_context *rsa, unsigned char *buf, int buflen );
-int rsa_parse_key( rsa_context *rsa, unsigned char *buf, int buflen,
- unsigned char *pwd, int pwdlen );
+#endif
-#ifdef __cplusplus
-}
-#endif
+extern void exim_rsa_init(void);
+extern blob * exim_rsa_data_append(blob *, int *, uschar *);
+
+extern const uschar * exim_rsa_signing_init(uschar *, es_ctx *);
+extern const uschar * exim_rsa_sign(es_ctx *, BOOL, blob *, blob *);
+extern const uschar * exim_rsa_verify_init(blob *, ev_ctx *);
+extern const uschar * exim_rsa_verify(ev_ctx *, BOOL, blob *, blob *);
-#endif /* rsa.h */
+#endif /*DISABLE_DKIM*/
+/* End of File */