585237fa886fbc080a50a7f788231ec1da08a223
[exim.git] / src / src / hash.h
1 /*
2  *  Exim - an Internet mail transport agent
3  *
4  *  Copyright (C) 2017  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
16 #ifdef SHA_OPENSSL
17 # include <openssl/sha.h>
18 #elif defined SHA_GNUTLS
19 # include <gnutls/crypto.h>
20 #elif defined(SHA_GCRYPT)
21 # include <gcrypt.h>
22 #elif defined(SHA_POLARSSL)
23 # include "pdkim/pdkim.h"               /*XXX ugly */
24 # include "pdkim/polarssl/sha1.h"
25 # include "pdkim/polarssl/sha2.h"
26 #endif
27
28
29 /* Hash context for the exim_sha_* routines */
30
31 typedef enum hashmethod {
32   HASH_BADTYPE,
33   HASH_SHA1,
34
35   HASH_SHA2_256,
36   HASH_SHA2_384,
37   HASH_SHA2_512,
38
39   HASH_SHA3_224,
40   HASH_SHA3_256,
41   HASH_SHA3_384,
42   HASH_SHA3_512,
43 } hashmethod;
44
45 typedef struct {
46   hashmethod    method;
47   int           hashlen;
48
49 #ifdef SHA_OPENSSL
50   union {
51     SHA_CTX      sha1;       /* SHA1 block                                */
52     SHA256_CTX   sha2_256;   /* SHA256 or 224 block                       */
53     SHA512_CTX   sha2_512;   /* SHA512 or 384 block                       */
54 #ifdef EXIM_HAVE_SHA3
55     EVP_MD_CTX * mctx;       /* SHA3 block                                */
56 #endif
57   } u;
58
59 #elif defined(SHA_GNUTLS)
60   gnutls_hash_hd_t sha;      /* Either SHA1 or SHA256 block               */
61
62 #elif defined(SHA_GCRYPT)
63   gcry_md_hd_t sha;          /* Either SHA1 or SHA256 block               */
64
65 #elif defined(SHA_POLARSSL)
66   union {
67     sha1_context sha1;       /* SHA1 block                                */
68     sha2_context sha2;       /* SHA256 block                              */
69   } u;
70
71 #elif defined(SHA_NATIVE)
72   sha1 sha1;
73 #endif
74
75 } hctx;
76
77 extern BOOL     exim_sha_init(hctx *, hashmethod);
78 extern void     exim_sha_update(hctx *, const uschar *a, int);
79 extern void     exim_sha_finish(hctx *, blob *);
80
81 #endif
82 /* End of File */