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2b8c00850b
There's two problems: - Some loops used `unsigned int` instead of `size_t`. - The 2*N-bit addition that is emulated using 2 N bit numbers has a bug: it first truncated the number to 32/64 bit and only then shifted. This resulted in the wrong length info stored inside the resulting hash. Closes GH-12937.
387 lines
11 KiB
C
387 lines
11 KiB
C
/*
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+----------------------------------------------------------------------+
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| Copyright (c) The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| https://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Stefan Esser <sesser@php.net> |
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+----------------------------------------------------------------------+
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*/
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#include "php.h"
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/* This code is heavily based on the PHP md5 implementation */
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#include "sha1.h"
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#include "md5.h"
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PHPAPI void make_sha1_digest(char *sha1str, const unsigned char *digest)
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{
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make_digest_ex(sha1str, digest, 20);
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}
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/* {{{ Calculate the sha1 hash of a string */
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PHP_FUNCTION(sha1)
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{
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zend_string *arg;
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bool raw_output = 0;
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PHP_SHA1_CTX context;
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unsigned char digest[20];
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ZEND_PARSE_PARAMETERS_START(1, 2)
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Z_PARAM_STR(arg)
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Z_PARAM_OPTIONAL
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Z_PARAM_BOOL(raw_output)
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ZEND_PARSE_PARAMETERS_END();
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PHP_SHA1Init(&context);
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PHP_SHA1Update(&context, (unsigned char *) ZSTR_VAL(arg), ZSTR_LEN(arg));
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PHP_SHA1Final(digest, &context);
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if (raw_output) {
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RETURN_STRINGL((char *) digest, 20);
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} else {
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RETVAL_NEW_STR(zend_string_alloc(40, 0));
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make_digest_ex(Z_STRVAL_P(return_value), digest, 20);
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}
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}
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/* }}} */
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/* {{{ Calculate the sha1 hash of given filename */
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PHP_FUNCTION(sha1_file)
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{
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char *arg;
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size_t arg_len;
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bool raw_output = 0;
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unsigned char buf[1024];
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unsigned char digest[20];
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PHP_SHA1_CTX context;
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ssize_t n;
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php_stream *stream;
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ZEND_PARSE_PARAMETERS_START(1, 2)
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Z_PARAM_PATH(arg, arg_len)
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Z_PARAM_OPTIONAL
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Z_PARAM_BOOL(raw_output)
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ZEND_PARSE_PARAMETERS_END();
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stream = php_stream_open_wrapper(arg, "rb", REPORT_ERRORS, NULL);
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if (!stream) {
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RETURN_FALSE;
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}
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PHP_SHA1Init(&context);
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while ((n = php_stream_read(stream, (char *) buf, sizeof(buf))) > 0) {
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PHP_SHA1Update(&context, buf, n);
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}
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PHP_SHA1Final(digest, &context);
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php_stream_close(stream);
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if (raw_output) {
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RETURN_STRINGL((char *) digest, 20);
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} else {
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RETVAL_NEW_STR(zend_string_alloc(40, 0));
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make_digest_ex(Z_STRVAL_P(return_value), digest, 20);
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}
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}
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/* }}} */
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static void SHA1Transform(uint32_t[5], const unsigned char[64]);
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static void SHA1Encode(unsigned char *, uint32_t *, unsigned int);
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static void SHA1Decode(uint32_t *, const unsigned char *, unsigned int);
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static const unsigned char PADDING[64] =
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{
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0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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/* F, G, H and I are basic SHA1 functions.
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*/
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#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
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#define G(x, y, z) ((x) ^ (y) ^ (z))
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#define H(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
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#define I(x, y, z) ((x) ^ (y) ^ (z))
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/* ROTATE_LEFT rotates x left n bits.
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*/
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#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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/* W[i]
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*/
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#define W(i) ( tmp=x[(i-3)&15]^x[(i-8)&15]^x[(i-14)&15]^x[i&15], \
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(x[i&15]=ROTATE_LEFT(tmp, 1)) )
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/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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*/
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#define FF(a, b, c, d, e, w) { \
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(e) += F ((b), (c), (d)) + (w) + (uint32_t)(0x5A827999); \
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(e) += ROTATE_LEFT ((a), 5); \
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(b) = ROTATE_LEFT((b), 30); \
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}
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#define GG(a, b, c, d, e, w) { \
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(e) += G ((b), (c), (d)) + (w) + (uint32_t)(0x6ED9EBA1); \
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(e) += ROTATE_LEFT ((a), 5); \
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(b) = ROTATE_LEFT((b), 30); \
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}
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#define HH(a, b, c, d, e, w) { \
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(e) += H ((b), (c), (d)) + (w) + (uint32_t)(0x8F1BBCDC); \
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(e) += ROTATE_LEFT ((a), 5); \
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(b) = ROTATE_LEFT((b), 30); \
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}
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#define II(a, b, c, d, e, w) { \
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(e) += I ((b), (c), (d)) + (w) + (uint32_t)(0xCA62C1D6); \
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(e) += ROTATE_LEFT ((a), 5); \
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(b) = ROTATE_LEFT((b), 30); \
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}
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/* {{{ PHP_SHA1Init
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* SHA1 initialization. Begins an SHA1 operation, writing a new context.
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*/
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PHPAPI void PHP_SHA1InitArgs(PHP_SHA1_CTX * context, ZEND_ATTRIBUTE_UNUSED HashTable *args)
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{
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context->count[0] = context->count[1] = 0;
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/* Load magic initialization constants.
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*/
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context->state[0] = 0x67452301;
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context->state[1] = 0xefcdab89;
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context->state[2] = 0x98badcfe;
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context->state[3] = 0x10325476;
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context->state[4] = 0xc3d2e1f0;
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}
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/* }}} */
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/* {{{ PHP_SHA1Update
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SHA1 block update operation. Continues an SHA1 message-digest
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operation, processing another message block, and updating the
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context.
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*/
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PHPAPI void PHP_SHA1Update(PHP_SHA1_CTX * context, const unsigned char *input,
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size_t inputLen)
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{
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unsigned int index, partLen;
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size_t i;
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/* Compute number of bytes mod 64 */
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index = (unsigned int) ((context->count[0] >> 3) & 0x3F);
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/* Update number of bits */
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if ((context->count[0] += ((uint32_t) inputLen << 3))
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< ((uint32_t) inputLen << 3))
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context->count[1]++;
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context->count[1] += (uint32_t) (inputLen >> 29);
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partLen = 64 - index;
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/* Transform as many times as possible.
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*/
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if (inputLen >= partLen) {
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memcpy
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((unsigned char*) & context->buffer[index], (unsigned char*) input, partLen);
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SHA1Transform(context->state, context->buffer);
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for (i = partLen; i + 63 < inputLen; i += 64)
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SHA1Transform(context->state, &input[i]);
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index = 0;
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} else
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i = 0;
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/* Buffer remaining input */
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memcpy
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((unsigned char*) & context->buffer[index], (unsigned char*) & input[i],
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inputLen - i);
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}
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/* }}} */
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/* {{{ PHP_SHA1Final
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SHA1 finalization. Ends an SHA1 message-digest operation, writing the
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the message digest and zeroizing the context.
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*/
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PHPAPI void PHP_SHA1Final(unsigned char digest[20], PHP_SHA1_CTX * context)
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{
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unsigned char bits[8];
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unsigned int index, padLen;
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/* Save number of bits */
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bits[7] = context->count[0] & 0xFF;
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bits[6] = (context->count[0] >> 8) & 0xFF;
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bits[5] = (context->count[0] >> 16) & 0xFF;
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bits[4] = (context->count[0] >> 24) & 0xFF;
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bits[3] = context->count[1] & 0xFF;
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bits[2] = (context->count[1] >> 8) & 0xFF;
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bits[1] = (context->count[1] >> 16) & 0xFF;
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bits[0] = (context->count[1] >> 24) & 0xFF;
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/* Pad out to 56 mod 64.
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*/
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index = (unsigned int) ((context->count[0] >> 3) & 0x3f);
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padLen = (index < 56) ? (56 - index) : (120 - index);
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PHP_SHA1Update(context, PADDING, padLen);
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/* Append length (before padding) */
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PHP_SHA1Update(context, bits, 8);
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/* Store state in digest */
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SHA1Encode(digest, context->state, 20);
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/* Zeroize sensitive information.
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*/
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ZEND_SECURE_ZERO((unsigned char*) context, sizeof(*context));
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}
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/* }}} */
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/* {{{ SHA1Transform
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* SHA1 basic transformation. Transforms state based on block.
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*/
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static void SHA1Transform(uint32_t state[5], const unsigned char block[64])
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{
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uint32_t a = state[0], b = state[1], c = state[2];
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uint32_t d = state[3], e = state[4], x[16], tmp;
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SHA1Decode(x, block, 64);
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/* Round 1 */
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FF(a, b, c, d, e, x[0]); /* 1 */
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FF(e, a, b, c, d, x[1]); /* 2 */
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FF(d, e, a, b, c, x[2]); /* 3 */
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FF(c, d, e, a, b, x[3]); /* 4 */
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FF(b, c, d, e, a, x[4]); /* 5 */
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FF(a, b, c, d, e, x[5]); /* 6 */
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FF(e, a, b, c, d, x[6]); /* 7 */
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FF(d, e, a, b, c, x[7]); /* 8 */
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FF(c, d, e, a, b, x[8]); /* 9 */
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FF(b, c, d, e, a, x[9]); /* 10 */
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FF(a, b, c, d, e, x[10]); /* 11 */
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FF(e, a, b, c, d, x[11]); /* 12 */
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FF(d, e, a, b, c, x[12]); /* 13 */
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FF(c, d, e, a, b, x[13]); /* 14 */
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FF(b, c, d, e, a, x[14]); /* 15 */
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FF(a, b, c, d, e, x[15]); /* 16 */
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FF(e, a, b, c, d, W(16)); /* 17 */
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FF(d, e, a, b, c, W(17)); /* 18 */
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FF(c, d, e, a, b, W(18)); /* 19 */
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FF(b, c, d, e, a, W(19)); /* 20 */
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/* Round 2 */
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GG(a, b, c, d, e, W(20)); /* 21 */
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GG(e, a, b, c, d, W(21)); /* 22 */
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GG(d, e, a, b, c, W(22)); /* 23 */
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GG(c, d, e, a, b, W(23)); /* 24 */
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GG(b, c, d, e, a, W(24)); /* 25 */
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GG(a, b, c, d, e, W(25)); /* 26 */
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GG(e, a, b, c, d, W(26)); /* 27 */
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GG(d, e, a, b, c, W(27)); /* 28 */
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GG(c, d, e, a, b, W(28)); /* 29 */
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GG(b, c, d, e, a, W(29)); /* 30 */
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GG(a, b, c, d, e, W(30)); /* 31 */
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GG(e, a, b, c, d, W(31)); /* 32 */
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GG(d, e, a, b, c, W(32)); /* 33 */
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GG(c, d, e, a, b, W(33)); /* 34 */
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GG(b, c, d, e, a, W(34)); /* 35 */
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GG(a, b, c, d, e, W(35)); /* 36 */
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GG(e, a, b, c, d, W(36)); /* 37 */
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GG(d, e, a, b, c, W(37)); /* 38 */
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GG(c, d, e, a, b, W(38)); /* 39 */
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GG(b, c, d, e, a, W(39)); /* 40 */
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/* Round 3 */
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HH(a, b, c, d, e, W(40)); /* 41 */
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HH(e, a, b, c, d, W(41)); /* 42 */
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HH(d, e, a, b, c, W(42)); /* 43 */
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HH(c, d, e, a, b, W(43)); /* 44 */
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HH(b, c, d, e, a, W(44)); /* 45 */
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HH(a, b, c, d, e, W(45)); /* 46 */
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HH(e, a, b, c, d, W(46)); /* 47 */
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HH(d, e, a, b, c, W(47)); /* 48 */
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HH(c, d, e, a, b, W(48)); /* 49 */
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HH(b, c, d, e, a, W(49)); /* 50 */
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HH(a, b, c, d, e, W(50)); /* 51 */
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HH(e, a, b, c, d, W(51)); /* 52 */
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HH(d, e, a, b, c, W(52)); /* 53 */
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HH(c, d, e, a, b, W(53)); /* 54 */
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HH(b, c, d, e, a, W(54)); /* 55 */
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HH(a, b, c, d, e, W(55)); /* 56 */
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HH(e, a, b, c, d, W(56)); /* 57 */
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HH(d, e, a, b, c, W(57)); /* 58 */
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HH(c, d, e, a, b, W(58)); /* 59 */
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HH(b, c, d, e, a, W(59)); /* 60 */
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/* Round 4 */
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II(a, b, c, d, e, W(60)); /* 61 */
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II(e, a, b, c, d, W(61)); /* 62 */
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II(d, e, a, b, c, W(62)); /* 63 */
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II(c, d, e, a, b, W(63)); /* 64 */
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II(b, c, d, e, a, W(64)); /* 65 */
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II(a, b, c, d, e, W(65)); /* 66 */
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II(e, a, b, c, d, W(66)); /* 67 */
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II(d, e, a, b, c, W(67)); /* 68 */
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II(c, d, e, a, b, W(68)); /* 69 */
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II(b, c, d, e, a, W(69)); /* 70 */
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II(a, b, c, d, e, W(70)); /* 71 */
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II(e, a, b, c, d, W(71)); /* 72 */
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II(d, e, a, b, c, W(72)); /* 73 */
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II(c, d, e, a, b, W(73)); /* 74 */
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II(b, c, d, e, a, W(74)); /* 75 */
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II(a, b, c, d, e, W(75)); /* 76 */
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II(e, a, b, c, d, W(76)); /* 77 */
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II(d, e, a, b, c, W(77)); /* 78 */
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II(c, d, e, a, b, W(78)); /* 79 */
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II(b, c, d, e, a, W(79)); /* 80 */
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state[0] += a;
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state[1] += b;
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state[2] += c;
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state[3] += d;
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state[4] += e;
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/* Zeroize sensitive information. */
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ZEND_SECURE_ZERO((unsigned char*) x, sizeof(x));
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}
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/* }}} */
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/* {{{ SHA1Encode
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Encodes input (uint32_t) into output (unsigned char). Assumes len is
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a multiple of 4.
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*/
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static void SHA1Encode(unsigned char *output, uint32_t *input, unsigned int len)
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{
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unsigned int i, j;
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for (i = 0, j = 0; j < len; i++, j += 4) {
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output[j] = (unsigned char) ((input[i] >> 24) & 0xff);
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output[j + 1] = (unsigned char) ((input[i] >> 16) & 0xff);
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output[j + 2] = (unsigned char) ((input[i] >> 8) & 0xff);
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output[j + 3] = (unsigned char) (input[i] & 0xff);
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}
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}
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/* }}} */
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/* {{{ SHA1Decode
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Decodes input (unsigned char) into output (uint32_t). Assumes len is
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a multiple of 4.
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*/
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static void SHA1Decode(uint32_t *output, const unsigned char *input, unsigned int len)
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{
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unsigned int i, j;
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for (i = 0, j = 0; j < len; i++, j += 4)
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output[i] = ((uint32_t) input[j + 3]) | (((uint32_t) input[j + 2]) << 8) |
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(((uint32_t) input[j + 1]) << 16) | (((uint32_t) input[j]) << 24);
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}
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/* }}} */
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