src/src/pdkim/hash.h

   1 /*
   2  *  PDKIM - a RFC4871 (DKIM) implementation
   3  *
   4  *  Copyright (C) 2016  Exim maintainers
   5  *
   6  *  Hash interface functions
   7  */
   8
   9 #include "../exim.h"
  10
  11 #if !defined(DISABLE_DKIM) && !defined(PDKIM_HASH_H)    /* entire file */
  12 #define PDKIM_HASH_H
  13
  14 #ifndef SUPPORT_TLS
  15 # error Need SUPPORT_TLS for DKIM
  16 #endif
  17
  18 #include "crypt_ver.h"
  19 #include "blob.h"
  20
  21 #ifdef RSA_OPENSSL
  22 # include <openssl/rsa.h>
  23 # include <openssl/ssl.h>
  24 # include <openssl/err.h>
  25 #elif defined(RSA_GNUTLS)
  26 # include <gnutls/gnutls.h>
  27 # include <gnutls/x509.h>
  28 #endif
  29
  30 #ifdef SHA_GNUTLS
  31 # include <gnutls/crypto.h>
  32 #elif defined(SHA_GCRYPT)
  33 # include <gcrypt.h>
  34 #elif defined(SHA_POLARSSL)
  35 # include "pdkim.h"
  36 # include "polarssl/sha1.h"
  37 # include "polarssl/sha2.h"
  38 #endif
  39
  40 /* Hash context */
  41 typedef struct {
  42   int sha1;
  43   int hashlen;
  44
  45 #ifdef SHA_OPENSSL
  46   union {
  47     SHA_CTX      sha1;       /* SHA1 block                                */
  48     SHA256_CTX   sha2;       /* SHA256 block                              */
  49   } u;
  50
  51 #elif defined(SHA_GNUTLS)
  52   gnutls_hash_hd_t sha;      /* Either SHA1 or SHA256 block               */
  53
  54 #elif defined(SHA_GCRYPT)
  55   gcry_md_hd_t sha;          /* Either SHA1 or SHA256 block               */
  56
  57 #elif defined(SHA_POLARSSL)
  58   union {
  59     sha1_context sha1;       /* SHA1 block                                */
  60     sha2_context sha2;       /* SHA256 block                              */
  61   } u;
  62 #endif
  63
  64 } hctx;
  65
  66 #if defined(SHA_OPENSSL)
  67 # include "pdkim.h"
  68 #elif defined(SHA_GCRYPT)
  69 # include "pdkim.h"
  70 #endif
  71
  72
  73 extern void     exim_sha_init(hctx *, BOOL);
  74 extern void     exim_sha_update(hctx *, const char *a, int);
  75 extern void     exim_sha_finish(hctx *, blob *);
  76 extern int      exim_sha_hashlen(hctx *);
  77
  78 #endif  /*DISABLE_DKIM*/
  79 /* End of File */