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php-src/ext/hash/hash_whirlpool.c
Anatol Belski 55d5bace0e more usages for ZEND_SECURE_ZERO()
2014-09-19 01:59:55 +02:00

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2014 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"
/*
* TODO: simplify Update and Final, those look ridiculously complex
* Mike, 2005-11-23
*/
#include "php_hash_whirlpool.h"
#include "php_hash_whirlpool_tables.h"
#define DIGESTBYTES 64
#define DIGESTBITS (8*DIGESTBYTES) /* 512 */
#define WBLOCKBYTES 64
#define WBLOCKBITS (8*WBLOCKBYTES) /* 512 */
#define LENGTHBYTES 32
#define LENGTHBITS (8*LENGTHBYTES) /* 256 */
static void WhirlpoolTransform(PHP_WHIRLPOOL_CTX *context)
{
int i, r;
php_hash_uint64 K[8]; /* the round key */
php_hash_uint64 block[8]; /* mu(buffer) */
php_hash_uint64 state[8]; /* the cipher state */
php_hash_uint64 L[8];
unsigned char *buffer = context->buffer.data;
/*
* map the buffer to a block:
*/
for (i = 0; i < 8; i++, buffer += 8) {
block[i] =
(((php_hash_uint64)buffer[0] ) << 56) ^
(((php_hash_uint64)buffer[1] & 0xffL) << 48) ^
(((php_hash_uint64)buffer[2] & 0xffL) << 40) ^
(((php_hash_uint64)buffer[3] & 0xffL) << 32) ^
(((php_hash_uint64)buffer[4] & 0xffL) << 24) ^
(((php_hash_uint64)buffer[5] & 0xffL) << 16) ^
(((php_hash_uint64)buffer[6] & 0xffL) << 8) ^
(((php_hash_uint64)buffer[7] & 0xffL) );
}
/*
* compute and apply K^0 to the cipher state:
*/
state[0] = block[0] ^ (K[0] = context->state[0]);
state[1] = block[1] ^ (K[1] = context->state[1]);
state[2] = block[2] ^ (K[2] = context->state[2]);
state[3] = block[3] ^ (K[3] = context->state[3]);
state[4] = block[4] ^ (K[4] = context->state[4]);
state[5] = block[5] ^ (K[5] = context->state[5]);
state[6] = block[6] ^ (K[6] = context->state[6]);
state[7] = block[7] ^ (K[7] = context->state[7]);
/*
* iterate over all rounds:
*/
for (r = 1; r <= R; r++) {
/*
* compute K^r from K^{r-1}:
*/
L[0] =
C0[(int)(K[0] >> 56) ] ^
C1[(int)(K[7] >> 48) & 0xff] ^
C2[(int)(K[6] >> 40) & 0xff] ^
C3[(int)(K[5] >> 32) & 0xff] ^
C4[(int)(K[4] >> 24) & 0xff] ^
C5[(int)(K[3] >> 16) & 0xff] ^
C6[(int)(K[2] >> 8) & 0xff] ^
C7[(int)(K[1] ) & 0xff] ^
rc[r];
L[1] =
C0[(int)(K[1] >> 56) ] ^
C1[(int)(K[0] >> 48) & 0xff] ^
C2[(int)(K[7] >> 40) & 0xff] ^
C3[(int)(K[6] >> 32) & 0xff] ^
C4[(int)(K[5] >> 24) & 0xff] ^
C5[(int)(K[4] >> 16) & 0xff] ^
C6[(int)(K[3] >> 8) & 0xff] ^
C7[(int)(K[2] ) & 0xff];
L[2] =
C0[(int)(K[2] >> 56) ] ^
C1[(int)(K[1] >> 48) & 0xff] ^
C2[(int)(K[0] >> 40) & 0xff] ^
C3[(int)(K[7] >> 32) & 0xff] ^
C4[(int)(K[6] >> 24) & 0xff] ^
C5[(int)(K[5] >> 16) & 0xff] ^
C6[(int)(K[4] >> 8) & 0xff] ^
C7[(int)(K[3] ) & 0xff];
L[3] =
C0[(int)(K[3] >> 56) ] ^
C1[(int)(K[2] >> 48) & 0xff] ^
C2[(int)(K[1] >> 40) & 0xff] ^
C3[(int)(K[0] >> 32) & 0xff] ^
C4[(int)(K[7] >> 24) & 0xff] ^
C5[(int)(K[6] >> 16) & 0xff] ^
C6[(int)(K[5] >> 8) & 0xff] ^
C7[(int)(K[4] ) & 0xff];
L[4] =
C0[(int)(K[4] >> 56) ] ^
C1[(int)(K[3] >> 48) & 0xff] ^
C2[(int)(K[2] >> 40) & 0xff] ^
C3[(int)(K[1] >> 32) & 0xff] ^
C4[(int)(K[0] >> 24) & 0xff] ^
C5[(int)(K[7] >> 16) & 0xff] ^
C6[(int)(K[6] >> 8) & 0xff] ^
C7[(int)(K[5] ) & 0xff];
L[5] =
C0[(int)(K[5] >> 56) ] ^
C1[(int)(K[4] >> 48) & 0xff] ^
C2[(int)(K[3] >> 40) & 0xff] ^
C3[(int)(K[2] >> 32) & 0xff] ^
C4[(int)(K[1] >> 24) & 0xff] ^
C5[(int)(K[0] >> 16) & 0xff] ^
C6[(int)(K[7] >> 8) & 0xff] ^
C7[(int)(K[6] ) & 0xff];
L[6] =
C0[(int)(K[6] >> 56) ] ^
C1[(int)(K[5] >> 48) & 0xff] ^
C2[(int)(K[4] >> 40) & 0xff] ^
C3[(int)(K[3] >> 32) & 0xff] ^
C4[(int)(K[2] >> 24) & 0xff] ^
C5[(int)(K[1] >> 16) & 0xff] ^
C6[(int)(K[0] >> 8) & 0xff] ^
C7[(int)(K[7] ) & 0xff];
L[7] =
C0[(int)(K[7] >> 56) ] ^
C1[(int)(K[6] >> 48) & 0xff] ^
C2[(int)(K[5] >> 40) & 0xff] ^
C3[(int)(K[4] >> 32) & 0xff] ^
C4[(int)(K[3] >> 24) & 0xff] ^
C5[(int)(K[2] >> 16) & 0xff] ^
C6[(int)(K[1] >> 8) & 0xff] ^
C7[(int)(K[0] ) & 0xff];
K[0] = L[0];
K[1] = L[1];
K[2] = L[2];
K[3] = L[3];
K[4] = L[4];
K[5] = L[5];
K[6] = L[6];
K[7] = L[7];
/*
* apply the r-th round transformation:
*/
L[0] =
C0[(int)(state[0] >> 56) ] ^
C1[(int)(state[7] >> 48) & 0xff] ^
C2[(int)(state[6] >> 40) & 0xff] ^
C3[(int)(state[5] >> 32) & 0xff] ^
C4[(int)(state[4] >> 24) & 0xff] ^
C5[(int)(state[3] >> 16) & 0xff] ^
C6[(int)(state[2] >> 8) & 0xff] ^
C7[(int)(state[1] ) & 0xff] ^
K[0];
L[1] =
C0[(int)(state[1] >> 56) ] ^
C1[(int)(state[0] >> 48) & 0xff] ^
C2[(int)(state[7] >> 40) & 0xff] ^
C3[(int)(state[6] >> 32) & 0xff] ^
C4[(int)(state[5] >> 24) & 0xff] ^
C5[(int)(state[4] >> 16) & 0xff] ^
C6[(int)(state[3] >> 8) & 0xff] ^
C7[(int)(state[2] ) & 0xff] ^
K[1];
L[2] =
C0[(int)(state[2] >> 56) ] ^
C1[(int)(state[1] >> 48) & 0xff] ^
C2[(int)(state[0] >> 40) & 0xff] ^
C3[(int)(state[7] >> 32) & 0xff] ^
C4[(int)(state[6] >> 24) & 0xff] ^
C5[(int)(state[5] >> 16) & 0xff] ^
C6[(int)(state[4] >> 8) & 0xff] ^
C7[(int)(state[3] ) & 0xff] ^
K[2];
L[3] =
C0[(int)(state[3] >> 56) ] ^
C1[(int)(state[2] >> 48) & 0xff] ^
C2[(int)(state[1] >> 40) & 0xff] ^
C3[(int)(state[0] >> 32) & 0xff] ^
C4[(int)(state[7] >> 24) & 0xff] ^
C5[(int)(state[6] >> 16) & 0xff] ^
C6[(int)(state[5] >> 8) & 0xff] ^
C7[(int)(state[4] ) & 0xff] ^
K[3];
L[4] =
C0[(int)(state[4] >> 56) ] ^
C1[(int)(state[3] >> 48) & 0xff] ^
C2[(int)(state[2] >> 40) & 0xff] ^
C3[(int)(state[1] >> 32) & 0xff] ^
C4[(int)(state[0] >> 24) & 0xff] ^
C5[(int)(state[7] >> 16) & 0xff] ^
C6[(int)(state[6] >> 8) & 0xff] ^
C7[(int)(state[5] ) & 0xff] ^
K[4];
L[5] =
C0[(int)(state[5] >> 56) ] ^
C1[(int)(state[4] >> 48) & 0xff] ^
C2[(int)(state[3] >> 40) & 0xff] ^
C3[(int)(state[2] >> 32) & 0xff] ^
C4[(int)(state[1] >> 24) & 0xff] ^
C5[(int)(state[0] >> 16) & 0xff] ^
C6[(int)(state[7] >> 8) & 0xff] ^
C7[(int)(state[6] ) & 0xff] ^
K[5];
L[6] =
C0[(int)(state[6] >> 56) ] ^
C1[(int)(state[5] >> 48) & 0xff] ^
C2[(int)(state[4] >> 40) & 0xff] ^
C3[(int)(state[3] >> 32) & 0xff] ^
C4[(int)(state[2] >> 24) & 0xff] ^
C5[(int)(state[1] >> 16) & 0xff] ^
C6[(int)(state[0] >> 8) & 0xff] ^
C7[(int)(state[7] ) & 0xff] ^
K[6];
L[7] =
C0[(int)(state[7] >> 56) ] ^
C1[(int)(state[6] >> 48) & 0xff] ^
C2[(int)(state[5] >> 40) & 0xff] ^
C3[(int)(state[4] >> 32) & 0xff] ^
C4[(int)(state[3] >> 24) & 0xff] ^
C5[(int)(state[2] >> 16) & 0xff] ^
C6[(int)(state[1] >> 8) & 0xff] ^
C7[(int)(state[0] ) & 0xff] ^
K[7];
state[0] = L[0];
state[1] = L[1];
state[2] = L[2];
state[3] = L[3];
state[4] = L[4];
state[5] = L[5];
state[6] = L[6];
state[7] = L[7];
}
/*
* apply the Miyaguchi-Preneel compression function:
*/
context->state[0] ^= state[0] ^ block[0];
context->state[1] ^= state[1] ^ block[1];
context->state[2] ^= state[2] ^ block[2];
context->state[3] ^= state[3] ^ block[3];
context->state[4] ^= state[4] ^ block[4];
context->state[5] ^= state[5] ^ block[5];
context->state[6] ^= state[6] ^ block[6];
context->state[7] ^= state[7] ^ block[7];
ZEND_SECURE_ZERO(state, sizeof(state));
}
PHP_HASH_API void PHP_WHIRLPOOLInit(PHP_WHIRLPOOL_CTX *context)
{
memset(context, 0, sizeof(*context));
}
PHP_HASH_API void PHP_WHIRLPOOLUpdate(PHP_WHIRLPOOL_CTX *context, const unsigned char *input, size_t len)
{
php_hash_uint64 sourceBits = len * 8;
int sourcePos = 0; /* index of leftmost source unsigned char containing data (1 to 8 bits). */
int sourceGap = (8 - ((int)sourceBits & 7)) & 7; /* space on source[sourcePos]. */
int bufferRem = context->buffer.bits & 7; /* occupied bits on buffer[bufferPos]. */
const unsigned char *source = input;
unsigned char *buffer = context->buffer.data;
unsigned char *bitLength = context->bitlength;
int bufferBits = context->buffer.bits;
int bufferPos = context->buffer.pos;
php_hash_uint32 b, carry;
int i;
/*
* tally the length of the added data:
*/
php_hash_uint64 value = sourceBits;
for (i = 31, carry = 0; i >= 0 && (carry != 0 || value != L64(0)); i--) {
carry += bitLength[i] + ((php_hash_uint32)value & 0xff);
bitLength[i] = (unsigned char)carry;
carry >>= 8;
value >>= 8;
}
/*
* process data in chunks of 8 bits (a more efficient approach would be to take whole-word chunks):
*/
while (sourceBits > 8) {
/* N.B. at least source[sourcePos] and source[sourcePos+1] contain data. */
/*
* take a byte from the source:
*/
b = ((source[sourcePos] << sourceGap) & 0xff) |
((source[sourcePos + 1] & 0xff) >> (8 - sourceGap));
/*
* process this byte:
*/
buffer[bufferPos++] |= (unsigned char)(b >> bufferRem);
bufferBits += 8 - bufferRem; /* bufferBits = 8*bufferPos; */
if (bufferBits == DIGESTBITS) {
/*
* process data block:
*/
WhirlpoolTransform(context);
/*
* reset buffer:
*/
bufferBits = bufferPos = 0;
}
buffer[bufferPos] = (unsigned char) (b << (8 - bufferRem));
bufferBits += bufferRem;
/*
* proceed to remaining data:
*/
sourceBits -= 8;
sourcePos++;
}
/* now 0 <= sourceBits <= 8;
* furthermore, all data (if any is left) is in source[sourcePos].
*/
if (sourceBits > 0) {
b = (source[sourcePos] << sourceGap) & 0xff; /* bits are left-justified on b. */
/*
* process the remaining bits:
*/
buffer[bufferPos] |= b >> bufferRem;
} else {
b = 0;
}
if (bufferRem + sourceBits < 8) {
/*
* all remaining data fits on buffer[bufferPos],
* and there still remains some space.
*/
bufferBits += (int) sourceBits;
} else {
/*
* buffer[bufferPos] is full:
*/
bufferPos++;
bufferBits += 8 - bufferRem; /* bufferBits = 8*bufferPos; */
sourceBits -= 8 - bufferRem;
/* now 0 <= sourceBits < 8;
* furthermore, all data (if any is left) is in source[sourcePos].
*/
if (bufferBits == DIGESTBITS) {
/*
* process data block:
*/
WhirlpoolTransform(context);
/*
* reset buffer:
*/
bufferBits = bufferPos = 0;
}
buffer[bufferPos] = (unsigned char) (b << (8 - bufferRem));
bufferBits += (int)sourceBits;
}
context->buffer.bits = bufferBits;
context->buffer.pos = bufferPos;
}
PHP_HASH_API void PHP_WHIRLPOOLFinal(unsigned char digest[64], PHP_WHIRLPOOL_CTX *context)
{
int i;
unsigned char *buffer = context->buffer.data;
unsigned char *bitLength = context->bitlength;
int bufferBits = context->buffer.bits;
int bufferPos = context->buffer.pos;
/*
* append a '1'-bit:
*/
buffer[bufferPos] |= 0x80U >> (bufferBits & 7);
bufferPos++; /* all remaining bits on the current unsigned char are set to zero. */
/*
* pad with zero bits to complete (N*WBLOCKBITS - LENGTHBITS) bits:
*/
if (bufferPos > WBLOCKBYTES - LENGTHBYTES) {
if (bufferPos < WBLOCKBYTES) {
memset(&buffer[bufferPos], 0, WBLOCKBYTES - bufferPos);
}
/*
* process data block:
*/
WhirlpoolTransform(context);
/*
* reset buffer:
*/
bufferPos = 0;
}
if (bufferPos < WBLOCKBYTES - LENGTHBYTES) {
memset(&buffer[bufferPos], 0, (WBLOCKBYTES - LENGTHBYTES) - bufferPos);
}
bufferPos = WBLOCKBYTES - LENGTHBYTES;
/*
* append bit length of hashed data:
*/
memcpy(&buffer[WBLOCKBYTES - LENGTHBYTES], bitLength, LENGTHBYTES);
/*
* process data block:
*/
WhirlpoolTransform(context);
/*
* return the completed message digest:
*/
for (i = 0; i < DIGESTBYTES/8; i++) {
digest[0] = (unsigned char)(context->state[i] >> 56);
digest[1] = (unsigned char)(context->state[i] >> 48);
digest[2] = (unsigned char)(context->state[i] >> 40);
digest[3] = (unsigned char)(context->state[i] >> 32);
digest[4] = (unsigned char)(context->state[i] >> 24);
digest[5] = (unsigned char)(context->state[i] >> 16);
digest[6] = (unsigned char)(context->state[i] >> 8);
digest[7] = (unsigned char)(context->state[i] );
digest += 8;
}
ZEND_SECURE_ZERO(context, sizeof(*context));
}
const php_hash_ops php_hash_whirlpool_ops = {
(php_hash_init_func_t) PHP_WHIRLPOOLInit,
(php_hash_update_func_t) PHP_WHIRLPOOLUpdate,
(php_hash_final_func_t) PHP_WHIRLPOOLFinal,
(php_hash_copy_func_t) php_hash_copy,
64,
64,
sizeof(PHP_WHIRLPOOL_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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