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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2012 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Michael Wallner <mike@php.net> |
| Sara Golemon <pollita@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php_hash.h"
#include "php_hash_tiger.h"
#include "php_hash_tiger_tables.h"
#if (defined(__APPLE__) || defined(__APPLE_CC__)) && (defined(__BIG_ENDIAN__) || defined(__LITTLE_ENDIAN__))
# if defined(__LITTLE_ENDIAN__)
# undef WORDS_BIGENDIAN
# else
# if defined(__BIG_ENDIAN__)
# define WORDS_BIGENDIAN
# endif
# endif
#endif
/* {{{ */
#define save_abc \
aa = a; \
bb = b; \
cc = c;
#define round(a,b,c,x,mul) \
c ^= x; \
a -= t1[(unsigned char)(c)] ^ \
t2[(unsigned char)(((php_hash_uint32)(c))>>(2*8))] ^ \
t3[(unsigned char)((c)>>(4*8))] ^ \
t4[(unsigned char)(((php_hash_uint32)((c)>>(4*8)))>>(2*8))] ; \
b += t4[(unsigned char)(((php_hash_uint32)(c))>>(1*8))] ^ \
t3[(unsigned char)(((php_hash_uint32)(c))>>(3*8))] ^ \
t2[(unsigned char)(((php_hash_uint32)((c)>>(4*8)))>>(1*8))] ^ \
t1[(unsigned char)(((php_hash_uint32)((c)>>(4*8)))>>(3*8))]; \
b *= mul;
#define pass(a,b,c,mul) \
round(a,b,c,x0,mul) \
round(b,c,a,x1,mul) \
round(c,a,b,x2,mul) \
round(a,b,c,x3,mul) \
round(b,c,a,x4,mul) \
round(c,a,b,x5,mul) \
round(a,b,c,x6,mul) \
round(b,c,a,x7,mul)
#define key_schedule \
x0 -= x7 ^ L64(0xA5A5A5A5A5A5A5A5); \
x1 ^= x0; \
x2 += x1; \
x3 -= x2 ^ ((~x1)<<19); \
x4 ^= x3; \
x5 += x4; \
x6 -= x5 ^ ((~x4)>>23); \
x7 ^= x6; \
x0 += x7; \
x1 -= x0 ^ ((~x7)<<19); \
x2 ^= x1; \
x3 += x2; \
x4 -= x3 ^ ((~x2)>>23); \
x5 ^= x4; \
x6 += x5; \
x7 -= x6 ^ L64(0x0123456789ABCDEF);
#define feedforward \
a ^= aa; \
b -= bb; \
c += cc;
#define compress(passes) \
save_abc \
pass(a,b,c,5) \
key_schedule \
pass(c,a,b,7) \
key_schedule \
pass(b,c,a,9) \
for(pass_no=0; pass_no<passes; pass_no++) { \
key_schedule \
pass(a,b,c,9) \
tmpa=a; a=c; c=b; b=tmpa; \
} \
feedforward
#define split_ex(str) \
x0=str[0]; x1=str[1]; x2=str[2]; x3=str[3]; \
x4=str[4]; x5=str[5]; x6=str[6]; x7=str[7];
#ifdef WORDS_BIGENDIAN
# define split(str) \
{ \
int i; \
php_hash_uint64 tmp[8]; \
\
for (i = 0; i < 64; ++i) { \
((unsigned char *) tmp)[i^7] = ((unsigned char *) str)[i]; \
} \
split_ex(tmp); \
}
#else
# define split split_ex
#endif
#define tiger_compress(passes, str, state) \
{ \
register php_hash_uint64 a, b, c, tmpa, x0, x1, x2, x3, x4, x5, x6, x7; \
php_hash_uint64 aa, bb, cc; \
unsigned int pass_no; \
\
a = state[0]; \
b = state[1]; \
c = state[2]; \
\
split(str); \
\
compress(passes); \
\
state[0] = a; \
state[1] = b; \
state[2] = c; \
}
/* }}} */
static inline void TigerFinalize(PHP_TIGER_CTX *context)
{
context->passed += (php_hash_uint64) context->length << 3;
context->buffer[context->length++] = 0x1;
if (context->length % 8) {
memset(&context->buffer[context->length], 0, 8-context->length%8);
context->length += 8-context->length%8;
}
if (context->length > 56) {
memset(&context->buffer[context->length], 0, 64 - context->length);
tiger_compress(context->passes, ((php_hash_uint64 *) context->buffer), context->state);
memset(context->buffer, 0, 56);
} else {
memset(&context->buffer[context->length], 0, 56 - context->length);
}
#ifndef WORDS_BIGENDIAN
memcpy(&context->buffer[56], &context->passed, sizeof(php_hash_uint64));
#else
context->buffer[56] = (unsigned char) (context->passed & 0xff);
context->buffer[57] = (unsigned char) ((context->passed >> 8) & 0xff);
context->buffer[58] = (unsigned char) ((context->passed >> 16) & 0xff);
context->buffer[59] = (unsigned char) ((context->passed >> 24) & 0xff);
context->buffer[60] = (unsigned char) ((context->passed >> 32) & 0xff);
context->buffer[61] = (unsigned char) ((context->passed >> 40) & 0xff);
context->buffer[62] = (unsigned char) ((context->passed >> 48) & 0xff);
context->buffer[63] = (unsigned char) ((context->passed >> 56) & 0xff);
#endif
tiger_compress(context->passes, ((php_hash_uint64 *) context->buffer), context->state);
}
static inline void TigerDigest(unsigned char *digest_str, unsigned int digest_len, PHP_TIGER_CTX *context)
{
unsigned int i;
for (i = 0; i < digest_len; ++i) {
digest_str[i] = (unsigned char) ((context->state[i/8] >> (8 * (i%8))) & 0xff);
}
}
PHP_HASH_API void PHP_3TIGERInit(PHP_TIGER_CTX *context)
{
memset(context, 0, sizeof(*context));
context->state[0] = L64(0x0123456789ABCDEF);
context->state[1] = L64(0xFEDCBA9876543210);
context->state[2] = L64(0xF096A5B4C3B2E187);
}
PHP_HASH_API void PHP_4TIGERInit(PHP_TIGER_CTX *context)
{
memset(context, 0, sizeof(*context));
context->passes = 1;
context->state[0] = L64(0x0123456789ABCDEF);
context->state[1] = L64(0xFEDCBA9876543210);
context->state[2] = L64(0xF096A5B4C3B2E187);
}
PHP_HASH_API void PHP_TIGERUpdate(PHP_TIGER_CTX *context, const unsigned char *input, size_t len)
{
if (context->length + len < 64) {
memcpy(&context->buffer[context->length], input, len);
context->length += len;
} else {
size_t i = 0, r = (context->length + len) % 64;
if (context->length) {
i = 64 - context->length;
memcpy(&context->buffer[context->length], input, i);
tiger_compress(context->passes, ((const php_hash_uint64 *) context->buffer), context->state);
memset(context->buffer, 0, 64);
context->passed += 512;
}
for (; i + 64 <= len; i += 64) {
memcpy(context->buffer, &input[i], 64);
tiger_compress(context->passes, ((const php_hash_uint64 *) context->buffer), context->state);
context->passed += 512;
}
memset(&context->buffer[r], 0, 64-r);
memcpy(context->buffer, &input[i], r);
context->length = r;
}
}
PHP_HASH_API void PHP_TIGER128Final(unsigned char digest[16], PHP_TIGER_CTX *context)
{
TigerFinalize(context);
TigerDigest(digest, 16, context);
memset(context, 0, sizeof(*context));
}
PHP_HASH_API void PHP_TIGER160Final(unsigned char digest[20], PHP_TIGER_CTX *context)
{
TigerFinalize(context);
TigerDigest(digest, 20, context);
memset(context, 0, sizeof(*context));
}
PHP_HASH_API void PHP_TIGER192Final(unsigned char digest[24], PHP_TIGER_CTX *context)
{
TigerFinalize(context);
TigerDigest(digest, 24, context);
memset(context, 0, sizeof(*context));
}
#define PHP_HASH_TIGER_OPS(p, b) \
const php_hash_ops php_hash_##p##tiger##b##_ops = { \
(php_hash_init_func_t) PHP_##p##TIGERInit, \
(php_hash_update_func_t) PHP_TIGERUpdate, \
(php_hash_final_func_t) PHP_TIGER##b##Final, \
(php_hash_copy_func_t) php_hash_copy, \
b/8, \
64, \
sizeof(PHP_TIGER_CTX) \
}
PHP_HASH_TIGER_OPS(3, 128);
PHP_HASH_TIGER_OPS(3, 160);
PHP_HASH_TIGER_OPS(3, 192);
PHP_HASH_TIGER_OPS(4, 128);
PHP_HASH_TIGER_OPS(4, 160);
PHP_HASH_TIGER_OPS(4, 192);
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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