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src/libdigidoc/openssl/include/openssl/hmac.h
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00001 /* crypto/hmac/hmac.h */
00002 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
00003  * All rights reserved.
00004  *
00005  * This package is an SSL implementation written
00006  * by Eric Young (eay@cryptsoft.com).
00007  * The implementation was written so as to conform with Netscapes SSL.
00008  * 
00009  * This library is free for commercial and non-commercial use as long as
00010  * the following conditions are aheared to.  The following conditions
00011  * apply to all code found in this distribution, be it the RC4, RSA,
00012  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
00013  * included with this distribution is covered by the same copyright terms
00014  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
00015  * 
00016  * Copyright remains Eric Young's, and as such any Copyright notices in
00017  * the code are not to be removed.
00018  * If this package is used in a product, Eric Young should be given attribution
00019  * as the author of the parts of the library used.
00020  * This can be in the form of a textual message at program startup or
00021  * in documentation (online or textual) provided with the package.
00022  * 
00023  * Redistribution and use in source and binary forms, with or without
00024  * modification, are permitted provided that the following conditions
00025  * are met:
00026  * 1. Redistributions of source code must retain the copyright
00027  *    notice, this list of conditions and the following disclaimer.
00028  * 2. Redistributions in binary form must reproduce the above copyright
00029  *    notice, this list of conditions and the following disclaimer in the
00030  *    documentation and/or other materials provided with the distribution.
00031  * 3. All advertising materials mentioning features or use of this software
00032  *    must display the following acknowledgement:
00033  *    "This product includes cryptographic software written by
00034  *     Eric Young (eay@cryptsoft.com)"
00035  *    The word 'cryptographic' can be left out if the rouines from the library
00036  *    being used are not cryptographic related :-).
00037  * 4. If you include any Windows specific code (or a derivative thereof) from 
00038  *    the apps directory (application code) you must include an acknowledgement:
00039  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
00040  * 
00041  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
00042  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00043  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00044  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
00045  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00046  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00047  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00048  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00049  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00050  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00051  * SUCH DAMAGE.
00052  * 
00053  * The licence and distribution terms for any publically available version or
00054  * derivative of this code cannot be changed.  i.e. this code cannot simply be
00055  * copied and put under another distribution licence
00056  * [including the GNU Public Licence.]
00057  */
00058 #ifndef HEADER_HMAC_H
00059 #define HEADER_HMAC_H
00060 
00061 #include <openssl/opensslconf.h>
00062 
00063 #ifdef OPENSSL_NO_HMAC
00064 #error HMAC is disabled.
00065 #endif
00066 
00067 #include <openssl/evp.h>
00068 
00069 #define HMAC_MAX_MD_CBLOCK      128     /* largest known is SHA512 */
00070 
00071 #ifdef  __cplusplus
00072 extern "C" {
00073 #endif
00074 
00075 typedef struct hmac_ctx_st
00076         {
00077         const EVP_MD *md;
00078         EVP_MD_CTX md_ctx;
00079         EVP_MD_CTX i_ctx;
00080         EVP_MD_CTX o_ctx;
00081         unsigned int key_length;
00082         unsigned char key[HMAC_MAX_MD_CBLOCK];
00083         } HMAC_CTX;
00084 
00085 #define HMAC_size(e)    (EVP_MD_size((e)->md))
00086 
00087 
00088 void HMAC_CTX_init(HMAC_CTX *ctx);
00089 void HMAC_CTX_cleanup(HMAC_CTX *ctx);
00090 
00091 #define HMAC_cleanup(ctx) HMAC_CTX_cleanup(ctx) /* deprecated */
00092 
00093 void HMAC_Init(HMAC_CTX *ctx, const void *key, int len,
00094                const EVP_MD *md); /* deprecated */
00095 void HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
00096                   const EVP_MD *md, ENGINE *impl);
00097 void HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len);
00098 void HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len);
00099 unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len,
00100                     const unsigned char *d, size_t n, unsigned char *md,
00101                     unsigned int *md_len);
00102 
00103 void HMAC_CTX_set_flags(HMAC_CTX *ctx, unsigned long flags);
00104 
00105 #ifdef  __cplusplus
00106 }
00107 #endif
00108 
00109 #endif
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