diff options
Diffstat (limited to 'libs/luci-lib-nixio/axTLS/crypto/hmac.c')
-rw-r--r-- | libs/luci-lib-nixio/axTLS/crypto/hmac.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/libs/luci-lib-nixio/axTLS/crypto/hmac.c b/libs/luci-lib-nixio/axTLS/crypto/hmac.c new file mode 100644 index 0000000000..9199ff2207 --- /dev/null +++ b/libs/luci-lib-nixio/axTLS/crypto/hmac.c @@ -0,0 +1,100 @@ +/* + * Copyright (c) 2007, Cameron Rich + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * * Neither the name of the axTLS project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/** + * HMAC implementation - This code was originally taken from RFC2104 + */ + +#include <string.h> +#include "crypto.h" + +/** + * Perform HMAC-MD5 + */ +void hmac_md5(const uint8_t *msg, int length, const uint8_t *key, + int key_len, uint8_t *digest) +{ + MD5_CTX context; + uint8_t k_ipad[64]; + uint8_t k_opad[64]; + int i; + + memset(k_ipad, 0, sizeof k_ipad); + memset(k_opad, 0, sizeof k_opad); + memcpy(k_ipad, key, key_len); + memcpy(k_opad, key, key_len); + + for (i = 0; i < 64; i++) + { + k_ipad[i] ^= 0x36; + k_opad[i] ^= 0x5c; + } + + MD5_Init(&context); + MD5_Update(&context, k_ipad, 64); + MD5_Update(&context, msg, length); + MD5_Final(digest, &context); + MD5_Init(&context); + MD5_Update(&context, k_opad, 64); + MD5_Update(&context, digest, MD5_SIZE); + MD5_Final(digest, &context); +} + +/** + * Perform HMAC-SHA1 + */ +void hmac_sha1(const uint8_t *msg, int length, const uint8_t *key, + int key_len, uint8_t *digest) +{ + SHA1_CTX context; + uint8_t k_ipad[64]; + uint8_t k_opad[64]; + int i; + + memset(k_ipad, 0, sizeof k_ipad); + memset(k_opad, 0, sizeof k_opad); + memcpy(k_ipad, key, key_len); + memcpy(k_opad, key, key_len); + + for (i = 0; i < 64; i++) + { + k_ipad[i] ^= 0x36; + k_opad[i] ^= 0x5c; + } + + SHA1_Init(&context); + SHA1_Update(&context, k_ipad, 64); + SHA1_Update(&context, msg, length); + SHA1_Final(digest, &context); + SHA1_Init(&context); + SHA1_Update(&context, k_opad, 64); + SHA1_Update(&context, digest, SHA1_SIZE); + SHA1_Final(digest, &context); +} |