1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
2 | * All rights reserved. |
3 | * |
4 | * This package is an SSL implementation written |
5 | * by Eric Young (eay@cryptsoft.com). |
6 | * The implementation was written so as to conform with Netscapes SSL. |
7 | * |
8 | * This library is free for commercial and non-commercial use as long as |
9 | * the following conditions are aheared to. The following conditions |
10 | * apply to all code found in this distribution, be it the RC4, RSA, |
11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
12 | * included with this distribution is covered by the same copyright terms |
13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
14 | * |
15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
16 | * the code are not to be removed. |
17 | * If this package is used in a product, Eric Young should be given attribution |
18 | * as the author of the parts of the library used. |
19 | * This can be in the form of a textual message at program startup or |
20 | * in documentation (online or textual) provided with the package. |
21 | * |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions |
24 | * are met: |
25 | * 1. Redistributions of source code must retain the copyright |
26 | * notice, this list of conditions and the following disclaimer. |
27 | * 2. Redistributions in binary form must reproduce the above copyright |
28 | * notice, this list of conditions and the following disclaimer in the |
29 | * documentation and/or other materials provided with the distribution. |
30 | * 3. All advertising materials mentioning features or use of this software |
31 | * must display the following acknowledgement: |
32 | * "This product includes cryptographic software written by |
33 | * Eric Young (eay@cryptsoft.com)" |
34 | * The word 'cryptographic' can be left out if the rouines from the library |
35 | * being used are not cryptographic related :-). |
36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
39 | * |
40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
50 | * SUCH DAMAGE. |
51 | * |
52 | * The licence and distribution terms for any publically available version or |
53 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
54 | * copied and put under another distribution licence |
55 | * [including the GNU Public Licence.] */ |
56 | |
57 | #ifndef OPENSSL_HEADER_DIGEST_INTERNAL_H |
58 | #define |
59 | |
60 | #include <openssl/base.h> |
61 | |
62 | #if defined(__cplusplus) |
63 | extern "C" { |
64 | #endif |
65 | |
66 | |
67 | struct env_md_st { |
68 | // type contains a NID identifing the digest function. (For example, |
69 | // NID_md5.) |
70 | int type; |
71 | |
72 | // md_size contains the size, in bytes, of the resulting digest. |
73 | unsigned md_size; |
74 | |
75 | // flags contains the OR of |EVP_MD_FLAG_*| values. |
76 | uint32_t flags; |
77 | |
78 | // init initialises the state in |ctx->md_data|. |
79 | void (*init)(EVP_MD_CTX *ctx); |
80 | |
81 | // update hashes |len| bytes of |data| into the state in |ctx->md_data|. |
82 | void (*update)(EVP_MD_CTX *ctx, const void *data, size_t count); |
83 | |
84 | // final completes the hash and writes |md_size| bytes of digest to |out|. |
85 | void (*final)(EVP_MD_CTX *ctx, uint8_t *out); |
86 | |
87 | // block_size contains the hash's native block size. |
88 | unsigned block_size; |
89 | |
90 | // ctx_size contains the size, in bytes, of the state of the hash function. |
91 | unsigned ctx_size; |
92 | }; |
93 | |
94 | // evp_md_pctx_ops contains function pointers to allow the |pctx| member of |
95 | // |EVP_MD_CTX| to be manipulated without breaking layering by calling EVP |
96 | // functions. |
97 | struct evp_md_pctx_ops { |
98 | // free is called when an |EVP_MD_CTX| is being freed and the |pctx| also |
99 | // needs to be freed. |
100 | void (*free) (EVP_PKEY_CTX *pctx); |
101 | |
102 | // dup is called when an |EVP_MD_CTX| is copied and so the |pctx| also needs |
103 | // to be copied. |
104 | EVP_PKEY_CTX* (*dup) (EVP_PKEY_CTX *pctx); |
105 | }; |
106 | |
107 | |
108 | #if defined(__cplusplus) |
109 | } // extern C |
110 | #endif |
111 | |
112 | #endif // OPENSSL_HEADER_DIGEST_INTERNAL |
113 | |