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58964a49 RE |
1 | /* crypto/hmac/hmac.h */ |
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
3 | * All rights reserved. | |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
8 | * | |
9 | * This library is free for commercial and non-commercial use as long as | |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 | * | |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
52 | * | |
53 | * The licence and distribution terms for any publically available version or | |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
58 | #ifndef HEADER_HMAC_H | |
59 | #define HEADER_HMAC_H | |
60 | ||
61 | #ifdef __cplusplus | |
62 | extern "C" { | |
63 | #endif | |
64 | ||
f5d7a031 | 65 | #ifdef NO_HMAC |
0d029f79 | 66 | #error HMAC is disabled. |
f5d7a031 UM |
67 | #endif |
68 | ||
ec577822 | 69 | #include <openssl/evp.h> |
58964a49 RE |
70 | |
71 | #define HMAC_MAX_MD_CBLOCK 64 | |
72 | ||
73 | typedef struct hmac_ctx_st | |
74 | { | |
e778802f | 75 | const EVP_MD *md; |
58964a49 RE |
76 | EVP_MD_CTX md_ctx; |
77 | EVP_MD_CTX i_ctx; | |
78 | EVP_MD_CTX o_ctx; | |
79 | unsigned int key_length; | |
80 | unsigned char key[HMAC_MAX_MD_CBLOCK]; | |
81 | } HMAC_CTX; | |
82 | ||
83 | #define HMAC_size(e) (EVP_MD_size((e)->md)) | |
84 | ||
58964a49 | 85 | |
72fbe87d | 86 | void HMAC_Init(HMAC_CTX *ctx, const void *key, int len, |
e778802f | 87 | const EVP_MD *md); |
58964a49 RE |
88 | void HMAC_Update(HMAC_CTX *ctx,unsigned char *key, int len); |
89 | void HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len); | |
90 | void HMAC_cleanup(HMAC_CTX *ctx); | |
72fbe87d BL |
91 | unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len, |
92 | unsigned char *d, int n, unsigned char *md, | |
93 | unsigned int *md_len); | |
58964a49 RE |
94 | |
95 | ||
58964a49 RE |
96 | #ifdef __cplusplus |
97 | } | |
98 | #endif | |
99 | ||
100 | #endif |