root/ext/hash/hash_tiger.c

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DEFINITIONS

This source file includes following definitions.
  1. TigerFinalize
  2. TigerDigest
  3. PHP_3TIGERInit
  4. PHP_4TIGERInit
  5. PHP_TIGERUpdate
  6. PHP_TIGER128Final
  7. PHP_TIGER160Final
  8. PHP_TIGER192Final

/*
  +----------------------------------------------------------------------+
  | PHP Version 5                                                        |
  +----------------------------------------------------------------------+
  | Copyright (c) 1997-2015 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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