root/ext/hash/hash_gost.c

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DEFINITIONS

This source file includes following definitions.
  1. Gost
  2. GostTransform
  3. PHP_GOSTInit
  4. PHP_GOSTUpdate
  5. PHP_GOSTFinal

/*
  +----------------------------------------------------------------------+
  | 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_gost.h"
#include "php_hash_gost_tables.h"

/* {{{ Gost()
 * derived from gost_compress() by Markku-Juhani Saarinen <mjos@ssh.fi>
 */

#define round(k1, k2) \
        t = (k1) + r; \
        l ^= tables[0][t & 0xff] ^ tables[1][(t >> 8) & 0xff] ^ \
                tables[2][(t >> 16) & 0xff] ^ tables[3][t >> 24]; \
        t = (k2) + l; \
        r ^= tables[0][t & 0xff] ^ tables[1][(t >> 8) & 0xff] ^ \
                tables[2][(t >> 16) & 0xff] ^ tables[3][t >> 24];

#define R(key, h, i, t, l, r) \
        r = h[i]; \
        l = h[i + 1]; \
        round(key[0], key[1]) \
        round(key[2], key[3]) \
        round(key[4], key[5]) \
        round(key[6], key[7]) \
        round(key[0], key[1]) \
        round(key[2], key[3]) \
        round(key[4], key[5]) \
        round(key[6], key[7]) \
        round(key[0], key[1]) \
        round(key[2], key[3]) \
        round(key[4], key[5]) \
        round(key[6], key[7]) \
        round(key[7], key[6]) \
        round(key[5], key[4]) \
        round(key[3], key[2]) \
        round(key[1], key[0]) \
        t = r; \
        r = l; \
        l = t; \

#define X(w, u, v) \
        w[0] = u[0] ^ v[0]; \
        w[1] = u[1] ^ v[1]; \
        w[2] = u[2] ^ v[2]; \
        w[3] = u[3] ^ v[3]; \
        w[4] = u[4] ^ v[4]; \
        w[5] = u[5] ^ v[5]; \
        w[6] = u[6] ^ v[6]; \
        w[7] = u[7] ^ v[7];

#define P(key, w) \
        key[0] = (w[0]  & 0x000000ff) | ((w[2] & 0x000000ff) << 8) | \
                ((w[4] & 0x000000ff) << 16) | ((w[6] & 0x000000ff) << 24); \
        key[1] = ((w[0] & 0x0000ff00) >> 8)  | (w[2]  & 0x0000ff00) | \
                ((w[4] & 0x0000ff00) << 8) | ((w[6] & 0x0000ff00) << 16); \
        key[2] = ((w[0] & 0x00ff0000) >> 16) | ((w[2] & 0x00ff0000) >> 8) | \
                (w[4] & 0x00ff0000) | ((w[6] & 0x00ff0000) << 8); \
        key[3] = ((w[0] & 0xff000000) >> 24) | ((w[2] & 0xff000000) >> 16) | \
                ((w[4] & 0xff000000) >> 8) | (w[6] & 0xff000000); \
        key[4] = (w[1] & 0x000000ff) | ((w[3] & 0x000000ff) << 8) | \
                ((w[5] & 0x000000ff) << 16) | ((w[7] & 0x000000ff) << 24); \
        key[5] = ((w[1] & 0x0000ff00) >> 8) | (w[3]  & 0x0000ff00) | \
                ((w[5] & 0x0000ff00) << 8) | ((w[7] & 0x0000ff00) << 16); \
        key[6] = ((w[1] & 0x00ff0000) >> 16) | ((w[3] & 0x00ff0000) >> 8) | \
                (w[5] & 0x00ff0000) | ((w[7] & 0x00ff0000) << 8); \
        key[7] = ((w[1] & 0xff000000) >> 24) | ((w[3] & 0xff000000) >> 16) | \
                ((w[5] & 0xff000000) >> 8) | (w[7] & 0xff000000);  

#define A(x, l, r) \
        l = x[0] ^ x[2]; \
        r = x[1] ^ x[3]; \
        x[0] = x[2]; \
        x[1] = x[3]; \
        x[2] = x[4]; \
        x[3] = x[5]; \
        x[4] = x[6]; \
        x[5] = x[7]; \
        x[6] = l; \
        x[7] = r;

#define AA(x, l, r) \
        l = x[0]; \
        r = x[2]; \
        x[0] = x[4]; \
        x[2] = x[6]; \
        x[4] = l ^ r; \
        x[6] = x[0] ^ r; \
        l = x[1]; \
        r = x[3]; \
        x[1] = x[5]; \
        x[3] = x[7]; \
        x[5] = l ^ r; \
        x[7] = x[1] ^ r;

#define C(x) \
        x[0] ^= 0xff00ff00; \
        x[1] ^= 0xff00ff00; \
        x[2] ^= 0x00ff00ff; \
        x[3] ^= 0x00ff00ff; \
        x[4] ^= 0x00ffff00; \
        x[5] ^= 0xff0000ff; \
        x[6] ^= 0x000000ff; \
        x[7] ^= 0xff00ffff;

#define S(s, l, r) \
                s[i] = r; \
                s[i + 1] = l;

#define SHIFT12(u, m, s) \
        u[0] = m[0] ^ s[6]; \
        u[1] = m[1] ^ s[7]; \
        u[2] = m[2] ^ (s[0] << 16) ^ (s[0] >> 16) ^ (s[0] & 0xffff) ^ \
                (s[1] & 0xffff) ^ (s[1] >> 16) ^ (s[2] << 16) ^ s[6] ^ (s[6] << 16) ^ \
                (s[7] & 0xffff0000) ^ (s[7] >> 16); \
        u[3] = m[3] ^ (s[0] & 0xffff) ^ (s[0] << 16) ^ (s[1] & 0xffff) ^ \
                (s[1] << 16) ^ (s[1] >> 16) ^ (s[2] << 16) ^ (s[2] >> 16) ^ \
                (s[3] << 16) ^ s[6] ^ (s[6] << 16) ^ (s[6] >> 16) ^ (s[7] & 0xffff) ^ \
                (s[7] << 16) ^ (s[7] >> 16); \
        u[4] = m[4] ^ \
                (s[0] & 0xffff0000) ^ (s[0] << 16) ^ (s[0] >> 16) ^ \
                (s[1] & 0xffff0000) ^ (s[1] >> 16) ^ (s[2] << 16) ^ (s[2] >> 16) ^ \
                (s[3] << 16) ^ (s[3] >> 16) ^ (s[4] << 16) ^ (s[6] << 16) ^ \
                (s[6] >> 16) ^(s[7] & 0xffff) ^ (s[7] << 16) ^ (s[7] >> 16); \
        u[5] = m[5] ^ (s[0] << 16) ^ (s[0] >> 16) ^ (s[0] & 0xffff0000) ^ \
                (s[1] & 0xffff) ^ s[2] ^ (s[2] >> 16) ^ (s[3] << 16) ^ (s[3] >> 16) ^ \
                (s[4] << 16) ^ (s[4] >> 16) ^ (s[5] << 16) ^  (s[6] << 16) ^ \
                (s[6] >> 16) ^ (s[7] & 0xffff0000) ^ (s[7] << 16) ^ (s[7] >> 16); \
        u[6] = m[6] ^ s[0] ^ (s[1] >> 16) ^ (s[2] << 16) ^ s[3] ^ (s[3] >> 16) ^ \
                (s[4] << 16) ^ (s[4] >> 16) ^ (s[5] << 16) ^ (s[5] >> 16) ^ s[6] ^ \
                (s[6] << 16) ^ (s[6] >> 16) ^ (s[7] << 16); \
        u[7] = m[7] ^ (s[0] & 0xffff0000) ^ (s[0] << 16) ^ (s[1] & 0xffff) ^ \
                (s[1] << 16) ^ (s[2] >> 16) ^ (s[3] << 16) ^ s[4] ^ (s[4] >> 16) ^ \
                (s[5] << 16) ^ (s[5] >> 16) ^ (s[6] >> 16) ^ (s[7] & 0xffff) ^ \
                (s[7] << 16) ^ (s[7] >> 16);

#define SHIFT16(h, v, u) \
        v[0] = h[0] ^ (u[1] << 16) ^ (u[0] >> 16); \
        v[1] = h[1] ^ (u[2] << 16) ^ (u[1] >> 16); \
        v[2] = h[2] ^ (u[3] << 16) ^ (u[2] >> 16); \
        v[3] = h[3] ^ (u[4] << 16) ^ (u[3] >> 16); \
        v[4] = h[4] ^ (u[5] << 16) ^ (u[4] >> 16); \
        v[5] = h[5] ^ (u[6] << 16) ^ (u[5] >> 16); \
        v[6] = h[6] ^ (u[7] << 16) ^ (u[6] >> 16); \
        v[7] = h[7] ^ (u[0] & 0xffff0000) ^ (u[0] << 16) ^ (u[7] >> 16) ^ \
                (u[1] & 0xffff0000) ^ (u[1] << 16) ^ (u[6] << 16) ^ (u[7] & 0xffff0000);

#define SHIFT61(h, v) \
        h[0] = (v[0] & 0xffff0000) ^ (v[0] << 16) ^ (v[0] >> 16) ^ (v[1] >> 16) ^ \
                (v[1] & 0xffff0000) ^ (v[2] << 16) ^ (v[3] >> 16) ^ (v[4] << 16) ^ \
                (v[5] >> 16) ^ v[5] ^ (v[6] >> 16) ^ (v[7] << 16) ^ (v[7] >> 16) ^ \
                (v[7] & 0xffff); \
        h[1] = (v[0] << 16) ^ (v[0] >> 16) ^ (v[0] & 0xffff0000) ^ (v[1] & 0xffff) ^ \
        v[2] ^ (v[2] >> 16) ^ (v[3] << 16) ^ (v[4] >> 16) ^ (v[5] << 16) ^ \
                (v[6] << 16) ^ v[6] ^ (v[7] & 0xffff0000) ^ (v[7] >> 16); \
        h[2] = (v[0] & 0xffff) ^ (v[0] << 16) ^ (v[1] << 16) ^ (v[1] >> 16) ^ \
                (v[1] & 0xffff0000) ^ (v[2] << 16) ^ (v[3] >> 16) ^ v[3] ^ (v[4] << 16) ^ \
                (v[5] >> 16) ^ v[6] ^ (v[6] >> 16) ^ (v[7] & 0xffff) ^ (v[7] << 16) ^ \
                (v[7] >> 16); \
        h[3] = (v[0] << 16) ^ (v[0] >> 16) ^ (v[0] & 0xffff0000) ^ \
                (v[1] & 0xffff0000) ^ (v[1] >> 16) ^ (v[2] << 16) ^ (v[2] >> 16) ^ v[2] ^ \
                (v[3] << 16) ^ (v[4] >> 16) ^ v[4] ^ (v[5] << 16) ^ (v[6] << 16) ^ \
                (v[7] & 0xffff) ^ (v[7] >> 16); \
        h[4] = (v[0] >> 16) ^ (v[1] << 16) ^ v[1] ^ (v[2] >> 16) ^ v[2] ^ \
                (v[3] << 16) ^ (v[3] >> 16) ^ v[3] ^ (v[4] << 16) ^ (v[5] >> 16) ^ \
        v[5] ^ (v[6] << 16) ^ (v[6] >> 16) ^ (v[7] << 16); \
        h[5] = (v[0] << 16) ^ (v[0] & 0xffff0000) ^ (v[1] << 16) ^ (v[1] >> 16) ^ \
                (v[1] & 0xffff0000) ^ (v[2] << 16) ^ v[2] ^ (v[3] >> 16) ^ v[3] ^ \
                (v[4] << 16) ^ (v[4] >> 16) ^ v[4] ^ (v[5] << 16) ^ (v[6] << 16) ^ \
                (v[6] >> 16) ^ v[6] ^ (v[7] << 16) ^ (v[7] >> 16) ^ (v[7] & 0xffff0000); \
        h[6] = v[0] ^ v[2] ^ (v[2] >> 16) ^ v[3] ^ (v[3] << 16) ^ v[4] ^ \
                (v[4] >> 16) ^ (v[5] << 16) ^ (v[5] >> 16) ^ v[5] ^ (v[6] << 16) ^ \
                (v[6] >> 16) ^ v[6] ^ (v[7] << 16) ^ v[7]; \
        h[7] = v[0] ^ (v[0] >> 16) ^ (v[1] << 16) ^ (v[1] >> 16) ^ (v[2] << 16) ^ \
                (v[3] >> 16) ^ v[3] ^ (v[4] << 16) ^ v[4] ^ (v[5] >> 16) ^ v[5] ^ \
                (v[6] << 16) ^ (v[6] >> 16) ^ (v[7] << 16) ^ v[7];

#define PASS \
        X(w, u, v); \
        P(key, w); \
        R(key, h, i, t, l, r); \
        S(s, l, r); \
        if (i != 6) { \
                A(u, l, r); \
                if (i == 2)     { \
                        C(u); \
                } \
                AA(v, l, r); \
        }

static inline void Gost(php_hash_uint32 state[8], php_hash_uint32 data[8])
{
        int i;
        php_hash_uint32 l, r, t, key[8], u[8], v[8], w[8], s[8], *h = state, *m = data;
        
        memcpy(u, state, sizeof(u));
        memcpy(v, data, sizeof(v));
        
        for (i = 0; i < 8; i += 2) {
                PASS;
        }
        SHIFT12(u, m, s);
        SHIFT16(h, v, u);
        SHIFT61(h, v);
}
/* }}} */

static inline void GostTransform(PHP_GOST_CTX *context, const unsigned char input[32])
{
        int i, j;
        php_hash_uint32 data[8], temp = 0, save = 0;
        
        for (i = 0, j = 0; i < 8; ++i, j += 4) {
                data[i] =       ((php_hash_uint32) input[j]) | (((php_hash_uint32) input[j + 1]) << 8) | 
                                        (((php_hash_uint32) input[j + 2]) << 16) | (((php_hash_uint32) input[j + 3]) << 24);
                save = context->state[i + 8];
                context->state[i + 8] += data[i] + temp;
                temp = ((context->state[i + 8] < data[i]) || (context->state[i + 8] < save)) ? 1 : 0;     
        }
        
        Gost(context->state, data);
}

PHP_HASH_API void PHP_GOSTInit(PHP_GOST_CTX *context)
{
        memset(context, 0, sizeof(*context));
}

static const php_hash_uint32 MAX32 = 0xffffffffLU;

PHP_HASH_API void PHP_GOSTUpdate(PHP_GOST_CTX *context, const unsigned char *input, size_t len)
{
        if ((MAX32 - context->count[0]) < (len * 8)) {
                context->count[1]++;
                context->count[0] = MAX32 - context->count[0];
                context->count[0] = (len * 8) - context->count[0];
        } else {
                context->count[0] += len * 8;
        }
        
        if (context->length + len < 32) {
                memcpy(&context->buffer[context->length], input, len);
                context->length += len;
        } else {
                size_t i = 0, r = (context->length + len) % 32;
                
                if (context->length) {
                        i = 32 - context->length;
                        memcpy(&context->buffer[context->length], input, i);
                        GostTransform(context, context->buffer);
                }
                
                for (; i + 32 <= len; i += 32) {
                        GostTransform(context, input + i);
                }
                
                memcpy(context->buffer, input + i, r);
                memset(&context->buffer[r], 0, 32 - r);
                context->length = r;
        }
}

PHP_HASH_API void PHP_GOSTFinal(unsigned char digest[32], PHP_GOST_CTX *context)
{
        php_hash_uint32 i, j, l[8] = {0};
        
        if (context->length) {
                GostTransform(context, context->buffer);
        }
        
        memcpy(l, context->count, sizeof(context->count));
        Gost(context->state, l);
        memcpy(l, &context->state[8], sizeof(l));
        Gost(context->state, l);
        
        for (i = 0, j = 0; j < 32; i++, j += 4) {
                digest[j] = (unsigned char) (context->state[i] & 0xff);
                digest[j + 1] = (unsigned char) ((context->state[i] >> 8) & 0xff);
                digest[j + 2] = (unsigned char) ((context->state[i] >> 16) & 0xff);
                digest[j + 3] = (unsigned char) ((context->state[i] >> 24) & 0xff);
        }
        
        memset(context, 0, sizeof(*context));
}

const php_hash_ops php_hash_gost_ops = {
        (php_hash_init_func_t) PHP_GOSTInit,
        (php_hash_update_func_t) PHP_GOSTUpdate,
        (php_hash_final_func_t) PHP_GOSTFinal,
        (php_hash_copy_func_t) php_hash_copy,
        32,
        32,
        sizeof(PHP_GOST_CTX)
};

/*
 * 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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