diff options
author | Sara Golemon <pollita@php.net> | 2006-11-15 20:06:09 +0000 |
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committer | Sara Golemon <pollita@php.net> | 2006-11-15 20:06:09 +0000 |
commit | 2eb308ff756ef04e6671357e6908c53bfe342eb6 (patch) | |
tree | 3e6a97252602a60c896cb4bab8d17373c7814327 /ext/hash/hash_md.c | |
parent | 892c00bb9f8ab68a870de5ec7f252d88048c69a4 (diff) | |
download | php-git-2eb308ff756ef04e6671357e6908c53bfe342eb6.tar.gz |
Backport md2, ripemd256, and ripemd320 algos from HEAD
Diffstat (limited to 'ext/hash/hash_md.c')
-rw-r--r-- | ext/hash/hash_md.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/ext/hash/hash_md.c b/ext/hash/hash_md.c index 530b9e8db0..c54ceb6dd7 100644 --- a/ext/hash/hash_md.c +++ b/ext/hash/hash_md.c @@ -39,6 +39,15 @@ php_hash_ops php_hash_md4_ops = { sizeof(PHP_MD4_CTX) }; +php_hash_ops php_hash_md2_ops = { + (php_hash_init_func_t) PHP_MD2Init, + (php_hash_update_func_t) PHP_MD2Update, + (php_hash_final_func_t) PHP_MD2Final, + 16, + 16, + sizeof(PHP_MD2_CTX) +}; + /* MD common stuff */ static unsigned char PADDING[64] = @@ -579,6 +588,95 @@ PHP_HASH_API void PHP_MD4Final(unsigned char digest[16], PHP_MD4_CTX * context) } /* }}} */ +/* MD2 */ + +static unsigned char MD2_S[256] = { + 41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6, 19, + 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188, 76, 130, 202, + 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24, 138, 23, 229, 18, + 190, 78, 196, 214, 218, 158, 222, 73, 160, 251, 245, 142, 187, 47, 238, 122, + 169, 104, 121, 145, 21, 178, 7, 63, 148, 194, 16, 137, 11, 34, 95, 33, + 128, 127, 93, 154, 90, 144, 50, 39, 53, 62, 204, 231, 191, 247, 151, 3, + 255, 25, 48, 179, 72, 165, 181, 209, 215, 94, 146, 42, 172, 86, 170, 198, + 79, 184, 56, 210, 150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, + 69, 157, 112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, + 27, 96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15, + 85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197, 234, 38, + 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65, 129, 77, 82, + 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123, 8, 12, 189, 177, 74, + 120, 136, 149, 139, 227, 99, 232, 109, 233, 203, 213, 254, 59, 0, 29, 57, + 242, 239, 183, 14, 102, 88, 208, 228, 166, 119, 114, 248, 235, 117, 75, 10, + 49, 68, 80, 180, 143, 237, 31, 26, 219, 153, 141, 51, 159, 17, 131, 20 }; + +PHP_HASH_API void PHP_MD2Init(PHP_MD2_CTX *context) +{ + memset(context, 0, sizeof(PHP_MD2_CTX)); +} + +static void MD2_Transform(PHP_MD2_CTX *context, const unsigned char *block) +{ + unsigned char i,j,t = 0; + + for(i = 0; i < 16; i++) { + context->state[16+i] = block[i]; + context->state[32+i] = (context->state[16+i] ^ context->state[i]); + } + + for(i = 0; i < 18; i++) { + for(j = 0; j < 48; j++) { + t = context->state[j] = context->state[j] ^ MD2_S[t]; + } + t += i; + } + + /* Update checksum -- must be after transform to avoid fouling up last message block */ + t = context->checksum[15]; + for(i = 0; i < 16; i++) { + t = context->checksum[i] ^= MD2_S[block[i] ^ t]; + } +} + +PHP_HASH_API void PHP_MD2Update(PHP_MD2_CTX *context, const unsigned char *buf, unsigned int len) +{ + const unsigned char *p = buf, *e = buf + len; + + if (context->in_buffer) { + if (context->in_buffer + len < 16) { + /* Not enough for block, just pass into buffer */ + memcpy(context->buffer + context->in_buffer, p, len); + context->in_buffer += len; + return; + } + /* Put buffered data together with inbound for a single block */ + memcpy(context->buffer + context->in_buffer, p, 16 - context->in_buffer); + MD2_Transform(context, context->buffer); + p += 16 - context->in_buffer; + context->in_buffer = 0; + } + + /* Process as many whole blocks as remain */ + while ((p + 16) <= e) { + MD2_Transform(context, p); + p += 16; + } + + /* Copy remaining data to buffer */ + if (p < e) { + memcpy(context->buffer, p, e - p); + context->in_buffer = e - p; + } +} + +PHP_HASH_API void PHP_MD2Final(unsigned char output[16], PHP_MD2_CTX *context) +{ + memset(context->buffer + context->in_buffer, 16 - context->in_buffer, 16 - context->in_buffer); + MD2_Transform(context, context->buffer); + MD2_Transform(context, context->checksum); + + memcpy(output, context->state, 16); +} + + /* * Local variables: * tab-width: 4 |