1 /* crypto/hmac/hmac.h */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 #include <openssl/opensslconf.h> 62 63 #ifdef OPENSSL_NO_HMAC 64 #error HMAC is disabled. 65 #endif 66 67 #include <openssl/evp.h> 68 69 #define HMAC_MAX_MD_CBLOCK 128 /* largest known is SHA512 */ 70 71 #ifdef __cplusplus 72 extern "C" { 73 #endif 74 75 typedef struct hmac_ctx_st 76 { 77 const EVP_MD *md; 78 EVP_MD_CTX md_ctx; 79 EVP_MD_CTX i_ctx; 80 EVP_MD_CTX o_ctx; 81 unsigned int key_length; 82 unsigned char key[HMAC_MAX_MD_CBLOCK]; 83 } HMAC_CTX; 84 85 #define HMAC_size(e) (EVP_MD_size((e)->md)) 86 87 88 void HMAC_CTX_init(HMAC_CTX *ctx); 89 void HMAC_CTX_cleanup(HMAC_CTX *ctx); 90 91 #define HMAC_cleanup(ctx) HMAC_CTX_cleanup(ctx) /* deprecated */ 92 93 int HMAC_Init(HMAC_CTX *ctx, const void *key, int len, 94 const EVP_MD *md); /* deprecated */ 95 int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len, 96 const EVP_MD *md, ENGINE *impl); 97 int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len); 98 int HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len); 99 unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len, 100 const unsigned char *d, size_t n, unsigned char *md, 101 unsigned int *md_len); 102 int HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx); 103 104 void HMAC_CTX_set_flags(HMAC_CTX *ctx, unsigned long flags); 105 106 #ifdef __cplusplus 107 } 108 #endif 109 110 #endif 111
