9e91f1aad776ad28b80448a0c1a294bf6f6c8c92
[exim.git] / 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 enum hashmethod {
33   HASH_BADTYPE,
34   HASH_SHA1,
35   HASH_SHA256,
36   HASH_SHA3_224,
37   HASH_SHA3_256,
38   HASH_SHA3_384,
39   HASH_SHA3_512,
40 } hashmethod;
41
42 typedef struct {
43   hashmethod    method;
44   int           hashlen;
45
46 #ifdef SHA_OPENSSL
47   union {
48     SHA_CTX      sha1;       /* SHA1 block                                */
49     SHA256_CTX   sha2;       /* SHA256 block                              */
50   } u;
51
52 #elif defined(SHA_GNUTLS)
53   gnutls_hash_hd_t sha;      /* Either SHA1 or SHA256 block               */
54
55 #elif defined(SHA_GCRYPT)
56   gcry_md_hd_t sha;          /* Either SHA1 or SHA256 block               */
57
58 #elif defined(SHA_POLARSSL)
59   union {
60     sha1_context sha1;       /* SHA1 block                                */
61     sha2_context sha2;       /* SHA256 block                              */
62   } u;
63
64 #elif defined(SHA_NATIVE)
65   sha1 sha1;
66 #endif
67
68 } hctx;
69
70 extern void     exim_sha_init(hctx *, hashmethod);
71 extern void     exim_sha_update(hctx *, const uschar *a, int);
72 extern void     exim_sha_finish(hctx *, blob *);
73 extern int      exim_sha_hashlen(hctx *);
74
75 #endif
76 /* End of File */