src/src/hash.h

   1 /*
   2  *  Exim - an Internet mail transport agent
   3  *
   4  *  Copyright (C) 2016  Exim maintainers
   5  *
   6  *  Hash interface functions
   7  */
   8
   9 #include "exim.h"
  10
  11 #if !defined(HASH_H)    /* entire file */
  12 #define HASH_H
  13
  14 #include "sha_ver.h"
  15 #include "blob.h"
  16
  17 #ifdef SHA_OPENSSL
  18 # include <openssl/sha.h>
  19 #elif defined SHA_GNUTLS
  20 # include <gnutls/crypto.h>
  21 #elif defined(SHA_GCRYPT)
  22 # include <gcrypt.h>
  23 #elif defined(SHA_POLARSSL)
  24 # include "pdkim/pdkim.h"               /*XXX ugly */
  25 # include "pdkim/polarssl/sha1.h"
  26 # include "pdkim/polarssl/sha2.h"
  27 #endif
  28
  29
  30 /* Hash context for the exim_sha_* routines */
  31
  32 typedef struct {
  33   BOOL is_sha1;
  34   int hashlen;
  35
  36 #ifdef SHA_OPENSSL
  37   union {
  38     SHA_CTX      sha1;       /* SHA1 block                                */
  39     SHA256_CTX   sha2;       /* SHA256 block                              */
  40   } u;
  41
  42 #elif defined(SHA_GNUTLS)
  43   gnutls_hash_hd_t sha;      /* Either SHA1 or SHA256 block               */
  44
  45 #elif defined(SHA_GCRYPT)
  46   gcry_md_hd_t sha;          /* Either SHA1 or SHA256 block               */
  47
  48 #elif defined(SHA_POLARSSL)
  49   union {
  50     sha1_context sha1;       /* SHA1 block                                */
  51     sha2_context sha2;       /* SHA256 block                              */
  52   } u;
  53
  54 #elif defined(SHA_NATIVE)
  55   sha1 sha1;
  56 #endif
  57
  58 } hctx;
  59
  60 extern void     exim_sha_init(hctx *, BOOL);
  61 extern void     exim_sha_update(hctx *, const uschar *a, int);
  62 extern void     exim_sha_finish(hctx *, blob *);
  63 extern int      exim_sha_hashlen(hctx *);
  64
  65 #endif
  66 /* End of File */