1998-12-21 18:56:39 +08:00
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/* crypto/hmac/hmac.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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2015-01-22 11:40:55 +08:00
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*
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1998-12-21 18:56:39 +08:00
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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2015-01-22 11:40:55 +08:00
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*
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1998-12-21 18:56:39 +08:00
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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2015-01-22 11:40:55 +08:00
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*
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1998-12-21 18:56:39 +08:00
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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2015-01-22 11:40:55 +08:00
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* 4. If you include any Windows specific code (or a derivative thereof) from
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1998-12-21 18:56:39 +08:00
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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2015-01-22 11:40:55 +08:00
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*
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1998-12-21 18:56:39 +08:00
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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2015-01-22 11:40:55 +08:00
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*
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1998-12-21 18:56:39 +08:00
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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2011-01-27 00:15:38 +08:00
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1998-12-21 18:56:39 +08:00
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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2015-05-14 22:56:48 +08:00
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#include "internal/cryptlib.h"
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2005-05-17 08:01:48 +08:00
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#include <openssl/hmac.h>
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2016-01-05 12:00:33 +08:00
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#include <openssl/opensslconf.h>
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2015-11-30 20:34:20 +08:00
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#include "hmac_lcl.h"
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1998-12-21 18:56:39 +08:00
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2008-11-12 11:58:08 +08:00
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int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
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2015-01-22 11:40:55 +08:00
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const EVP_MD *md, ENGINE *impl)
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{
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int i, j, reset = 0;
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unsigned char pad[HMAC_MAX_MD_CBLOCK];
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2015-06-12 20:08:04 +08:00
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/* If we are changing MD then we must have a key */
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if (md != NULL && md != ctx->md && (key == NULL || len < 0))
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return 0;
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2015-01-22 11:40:55 +08:00
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if (md != NULL) {
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reset = 1;
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ctx->md = md;
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2015-04-16 13:50:03 +08:00
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} else if (ctx->md) {
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2015-01-22 11:40:55 +08:00
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md = ctx->md;
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2015-02-10 19:39:52 +08:00
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} else {
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return 0;
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}
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2015-01-22 11:40:55 +08:00
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if (key != NULL) {
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reset = 1;
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2015-11-27 21:10:15 +08:00
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j = EVP_MD_block_size(md);
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2015-01-22 11:40:55 +08:00
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OPENSSL_assert(j <= (int)sizeof(ctx->key));
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if (j < len) {
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2015-11-27 21:10:15 +08:00
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if (!EVP_DigestInit_ex(ctx->md_ctx, md, impl))
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2015-01-22 11:40:55 +08:00
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goto err;
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2015-11-27 21:10:15 +08:00
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if (!EVP_DigestUpdate(ctx->md_ctx, key, len))
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2015-01-22 11:40:55 +08:00
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goto err;
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2015-11-27 21:10:15 +08:00
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if (!EVP_DigestFinal_ex(ctx->md_ctx, ctx->key,
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2015-01-22 11:40:55 +08:00
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&ctx->key_length))
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goto err;
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} else {
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2015-04-16 13:50:03 +08:00
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if (len < 0 || len > (int)sizeof(ctx->key))
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2015-02-10 21:15:25 +08:00
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return 0;
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2015-01-22 11:40:55 +08:00
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memcpy(ctx->key, key, len);
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ctx->key_length = len;
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}
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if (ctx->key_length != HMAC_MAX_MD_CBLOCK)
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memset(&ctx->key[ctx->key_length], 0,
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HMAC_MAX_MD_CBLOCK - ctx->key_length);
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}
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if (reset) {
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for (i = 0; i < HMAC_MAX_MD_CBLOCK; i++)
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pad[i] = 0x36 ^ ctx->key[i];
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2015-11-27 21:10:15 +08:00
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if (!EVP_DigestInit_ex(ctx->i_ctx, md, impl))
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2015-01-22 11:40:55 +08:00
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goto err;
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2015-11-27 21:10:15 +08:00
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if (!EVP_DigestUpdate(ctx->i_ctx, pad, EVP_MD_block_size(md)))
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2015-01-22 11:40:55 +08:00
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goto err;
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for (i = 0; i < HMAC_MAX_MD_CBLOCK; i++)
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pad[i] = 0x5c ^ ctx->key[i];
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2015-11-27 21:10:15 +08:00
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if (!EVP_DigestInit_ex(ctx->o_ctx, md, impl))
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2015-01-22 11:40:55 +08:00
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goto err;
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2015-11-27 21:10:15 +08:00
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if (!EVP_DigestUpdate(ctx->o_ctx, pad, EVP_MD_block_size(md)))
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2015-01-22 11:40:55 +08:00
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goto err;
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}
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2015-11-27 21:10:15 +08:00
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if (!EVP_MD_CTX_copy_ex(ctx->md_ctx, ctx->i_ctx))
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2015-01-22 11:40:55 +08:00
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goto err;
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return 1;
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err:
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return 0;
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}
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1998-12-21 18:56:39 +08:00
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2016-01-05 12:00:33 +08:00
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#if OPENSSL_API_COMPAT < 0x10100000L
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2008-11-12 11:58:08 +08:00
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int HMAC_Init(HMAC_CTX *ctx, const void *key, int len, const EVP_MD *md)
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2015-01-22 11:40:55 +08:00
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{
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if (key && md)
|
2015-12-03 05:49:24 +08:00
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HMAC_CTX_reset(ctx);
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2015-01-22 11:40:55 +08:00
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return HMAC_Init_ex(ctx, key, len, md, NULL);
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}
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2015-02-10 17:45:18 +08:00
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#endif
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2001-12-10 05:53:31 +08:00
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|
2008-11-03 00:00:39 +08:00
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int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len)
|
2015-01-22 11:40:55 +08:00
|
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{
|
2015-06-12 20:08:04 +08:00
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if (!ctx->md)
|
2015-02-10 19:39:52 +08:00
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return 0;
|
2015-11-27 21:10:15 +08:00
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return EVP_DigestUpdate(ctx->md_ctx, data, len);
|
2015-01-22 11:40:55 +08:00
|
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|
}
|
1998-12-21 18:56:39 +08:00
|
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|
2008-11-03 00:00:39 +08:00
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int HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len)
|
2015-01-22 11:40:55 +08:00
|
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|
{
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unsigned int i;
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unsigned char buf[EVP_MAX_MD_SIZE];
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|
|
|
2015-06-12 20:08:04 +08:00
|
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|
if (!ctx->md)
|
2015-02-10 19:39:52 +08:00
|
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|
goto err;
|
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|
|
|
2015-11-27 21:10:15 +08:00
|
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if (!EVP_DigestFinal_ex(ctx->md_ctx, buf, &i))
|
2015-01-22 11:40:55 +08:00
|
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|
goto err;
|
2015-11-27 21:10:15 +08:00
|
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|
if (!EVP_MD_CTX_copy_ex(ctx->md_ctx, ctx->o_ctx))
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
2015-11-27 21:10:15 +08:00
|
|
|
if (!EVP_DigestUpdate(ctx->md_ctx, buf, i))
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
2015-11-27 21:10:15 +08:00
|
|
|
if (!EVP_DigestFinal_ex(ctx->md_ctx, md, len))
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
|
|
|
return 1;
|
|
|
|
err:
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|
|
|
return 0;
|
|
|
|
}
|
2001-07-31 07:57:25 +08:00
|
|
|
|
2015-11-30 20:34:20 +08:00
|
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|
size_t HMAC_size(HMAC_CTX *ctx)
|
|
|
|
{
|
|
|
|
return EVP_MD_size((ctx)->md);
|
|
|
|
}
|
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|
|
|
|
|
|
HMAC_CTX *HMAC_CTX_new(void)
|
|
|
|
{
|
|
|
|
HMAC_CTX *ctx = (HMAC_CTX *)OPENSSL_zalloc(sizeof(HMAC_CTX));
|
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|
|
if (ctx)
|
2015-12-03 05:47:31 +08:00
|
|
|
if (!HMAC_CTX_reset(ctx)) {
|
2015-11-30 20:34:20 +08:00
|
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|
HMAC_CTX_free(ctx);
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|
|
ctx = NULL;
|
|
|
|
}
|
|
|
|
return ctx;
|
|
|
|
}
|
|
|
|
|
2015-12-01 06:42:39 +08:00
|
|
|
static void hmac_ctx_cleanup(HMAC_CTX *ctx)
|
|
|
|
{
|
2015-12-02 07:49:35 +08:00
|
|
|
EVP_MD_CTX_reset(ctx->i_ctx);
|
|
|
|
EVP_MD_CTX_reset(ctx->o_ctx);
|
|
|
|
EVP_MD_CTX_reset(ctx->md_ctx);
|
2015-12-01 06:42:39 +08:00
|
|
|
ctx->md = NULL;
|
|
|
|
ctx->key_length = 0;
|
|
|
|
memset(ctx->key, 0, sizeof(HMAC_MAX_MD_CBLOCK));
|
|
|
|
}
|
|
|
|
|
2015-11-30 20:34:20 +08:00
|
|
|
void HMAC_CTX_free(HMAC_CTX *ctx)
|
|
|
|
{
|
|
|
|
if (ctx != NULL) {
|
2015-12-01 06:42:39 +08:00
|
|
|
hmac_ctx_cleanup(ctx);
|
2015-12-02 07:49:35 +08:00
|
|
|
EVP_MD_CTX_free(ctx->i_ctx);
|
|
|
|
EVP_MD_CTX_free(ctx->o_ctx);
|
|
|
|
EVP_MD_CTX_free(ctx->md_ctx);
|
2015-11-30 20:34:20 +08:00
|
|
|
OPENSSL_free(ctx);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-12-03 05:47:31 +08:00
|
|
|
int HMAC_CTX_reset(HMAC_CTX *ctx)
|
2015-01-22 11:40:55 +08:00
|
|
|
{
|
2015-12-01 06:42:39 +08:00
|
|
|
hmac_ctx_cleanup(ctx);
|
2015-11-27 21:10:15 +08:00
|
|
|
if (ctx->i_ctx == NULL)
|
2015-12-02 07:49:35 +08:00
|
|
|
ctx->i_ctx = EVP_MD_CTX_new();
|
2015-11-27 21:10:15 +08:00
|
|
|
if (ctx->i_ctx == NULL)
|
|
|
|
goto err;
|
|
|
|
if (ctx->o_ctx == NULL)
|
2015-12-02 07:49:35 +08:00
|
|
|
ctx->o_ctx = EVP_MD_CTX_new();
|
2015-11-27 21:10:15 +08:00
|
|
|
if (ctx->o_ctx == NULL)
|
|
|
|
goto err;
|
|
|
|
if (ctx->md_ctx == NULL)
|
2015-12-02 07:49:35 +08:00
|
|
|
ctx->md_ctx = EVP_MD_CTX_new();
|
2015-11-27 21:10:15 +08:00
|
|
|
if (ctx->md_ctx == NULL)
|
|
|
|
goto err;
|
2015-02-10 19:39:52 +08:00
|
|
|
ctx->md = NULL;
|
2015-11-27 21:10:15 +08:00
|
|
|
return 1;
|
|
|
|
err:
|
2015-12-01 06:42:39 +08:00
|
|
|
hmac_ctx_cleanup(ctx);
|
2015-11-27 21:10:15 +08:00
|
|
|
return 0;
|
2015-01-22 11:40:55 +08:00
|
|
|
}
|
1998-12-21 18:56:39 +08:00
|
|
|
|
2008-11-03 00:00:39 +08:00
|
|
|
int HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx)
|
2015-01-22 11:40:55 +08:00
|
|
|
{
|
2015-12-03 05:49:24 +08:00
|
|
|
if (!HMAC_CTX_reset(dctx))
|
2015-11-27 21:10:15 +08:00
|
|
|
goto err;
|
|
|
|
if (!EVP_MD_CTX_copy_ex(dctx->i_ctx, sctx->i_ctx))
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
2015-11-27 21:10:15 +08:00
|
|
|
if (!EVP_MD_CTX_copy_ex(dctx->o_ctx, sctx->o_ctx))
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
2015-11-27 21:10:15 +08:00
|
|
|
if (!EVP_MD_CTX_copy_ex(dctx->md_ctx, sctx->md_ctx))
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
2015-06-12 20:08:04 +08:00
|
|
|
memcpy(dctx->key, sctx->key, HMAC_MAX_MD_CBLOCK);
|
|
|
|
dctx->key_length = sctx->key_length;
|
2015-01-22 11:40:55 +08:00
|
|
|
dctx->md = sctx->md;
|
|
|
|
return 1;
|
|
|
|
err:
|
2015-12-01 06:42:39 +08:00
|
|
|
hmac_ctx_cleanup(dctx);
|
2015-01-22 11:40:55 +08:00
|
|
|
return 0;
|
|
|
|
}
|
2007-04-11 20:33:06 +08:00
|
|
|
|
2008-11-12 11:58:08 +08:00
|
|
|
unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len,
|
2015-01-22 11:40:55 +08:00
|
|
|
const unsigned char *d, size_t n, unsigned char *md,
|
|
|
|
unsigned int *md_len)
|
|
|
|
{
|
2015-11-30 20:34:20 +08:00
|
|
|
HMAC_CTX *c = NULL;
|
2015-01-22 11:40:55 +08:00
|
|
|
static unsigned char m[EVP_MAX_MD_SIZE];
|
|
|
|
|
|
|
|
if (md == NULL)
|
|
|
|
md = m;
|
2015-11-30 20:34:20 +08:00
|
|
|
if ((c = HMAC_CTX_new()) == NULL)
|
|
|
|
goto err;
|
|
|
|
if (!HMAC_Init_ex(c, key, key_len, evp_md, NULL))
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
2015-11-30 20:34:20 +08:00
|
|
|
if (!HMAC_Update(c, d, n))
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
2015-11-30 20:34:20 +08:00
|
|
|
if (!HMAC_Final(c, md, md_len))
|
2015-01-22 11:40:55 +08:00
|
|
|
goto err;
|
2015-11-30 20:34:20 +08:00
|
|
|
HMAC_CTX_free(c);
|
2015-01-22 11:40:55 +08:00
|
|
|
return md;
|
|
|
|
err:
|
2015-11-30 20:34:20 +08:00
|
|
|
HMAC_CTX_free(c);
|
2015-01-22 11:40:55 +08:00
|
|
|
return NULL;
|
|
|
|
}
|
1998-12-21 18:56:39 +08:00
|
|
|
|
2010-01-26 22:29:06 +08:00
|
|
|
void HMAC_CTX_set_flags(HMAC_CTX *ctx, unsigned long flags)
|
2015-01-22 11:40:55 +08:00
|
|
|
{
|
2015-11-27 21:10:15 +08:00
|
|
|
EVP_MD_CTX_set_flags(ctx->i_ctx, flags);
|
|
|
|
EVP_MD_CTX_set_flags(ctx->o_ctx, flags);
|
|
|
|
EVP_MD_CTX_set_flags(ctx->md_ctx, flags);
|
2015-01-22 11:40:55 +08:00
|
|
|
}
|