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hash.c
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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| 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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Sara Golemon <[email protected]> |
| Scott MacVicar <[email protected]> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <math.h>
#include "php_hash.h"
#include "ext/standard/info.h"
#include "ext/standard/file.h"
static int php_hash_le_hash;
HashTable php_hash_hashtable;
#if (PHP_MAJOR_VERSION >= 5)
# define DEFAULT_CONTEXT FG(default_context)
#else
# define DEFAULT_CONTEXT NULL
#endif
#ifdef PHP_MHASH_BC
struct mhash_bc_entry {
char *mhash_name;
char *hash_name;
int value;
};
#define MHASH_NUM_ALGOS 34
static struct mhash_bc_entry mhash_to_hash[MHASH_NUM_ALGOS] = {
{"CRC32", "crc32", 0},
{"MD5", "md5", 1},
{"SHA1", "sha1", 2},
{"HAVAL256", "haval256,3", 3},
{NULL, NULL, 4},
{"RIPEMD160", "ripemd160", 5},
{NULL, NULL, 6},
{"TIGER", "tiger192,3", 7},
{"GOST", "gost", 8},
{"CRC32B", "crc32b", 9},
{"HAVAL224", "haval224,3", 10},
{"HAVAL192", "haval192,3", 11},
{"HAVAL160", "haval160,3", 12},
{"HAVAL128", "haval128,3", 13},
{"TIGER128", "tiger128,3", 14},
{"TIGER160", "tiger160,3", 15},
{"MD4", "md4", 16},
{"SHA256", "sha256", 17},
{"ADLER32", "adler32", 18},
{"SHA224", "sha224", 19},
{"SHA512", "sha512", 20},
{"SHA384", "sha384", 21},
{"WHIRLPOOL", "whirlpool", 22},
{"RIPEMD128", "ripemd128", 23},
{"RIPEMD256", "ripemd256", 24},
{"RIPEMD320", "ripemd320", 25},
{NULL, NULL, 26}, /* support needs to be added for snefru 128 */
{"SNEFRU256", "snefru256", 27},
{"MD2", "md2", 28},
{"FNV132", "fnv132", 29},
{"FNV1A32", "fnv1a32", 30},
{"FNV164", "fnv164", 31},
{"FNV1A64", "fnv1a64", 32},
{"JOAAT", "joaat", 33},
};
#endif
/* Hash Registry Access */
PHP_HASH_API const php_hash_ops *php_hash_fetch_ops(const char *algo, size_t algo_len) /* {{{ */
{
char *lower = zend_str_tolower_dup(algo, algo_len);
php_hash_ops *ops = zend_hash_str_find_ptr(&php_hash_hashtable, lower, algo_len);
efree(lower);
return ops;
}
/* }}} */
PHP_HASH_API void php_hash_register_algo(const char *algo, const php_hash_ops *ops) /* {{{ */
{
int algo_len = strlen(algo);
char *lower = zend_str_tolower_dup(algo, algo_len);
zend_hash_str_add_ptr(&php_hash_hashtable, lower, algo_len, (void *) ops);
efree(lower);
}
/* }}} */
PHP_HASH_API int php_hash_copy(const void *ops, void *orig_context, void *dest_context) /* {{{ */
{
php_hash_ops *hash_ops = (php_hash_ops *)ops;
memcpy(dest_context, orig_context, hash_ops->context_size);
return SUCCESS;
}
/* }}} */
/* Userspace */
static void php_hash_do_hash(INTERNAL_FUNCTION_PARAMETERS, int isfilename, zend_bool raw_output_default) /* {{{ */
{
zend_string *digest;
char *algo, *data;
size_t algo_len, data_len;
zend_bool raw_output = raw_output_default;
const php_hash_ops *ops;
void *context;
php_stream *stream = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss|b", &algo, &algo_len, &data, &data_len, &raw_output) == FAILURE) {
return;
}
ops = php_hash_fetch_ops(algo, algo_len);
if (!ops) {
php_error_docref(NULL, E_WARNING, "Unknown hashing algorithm: %s", algo);
RETURN_FALSE;
}
if (isfilename) {
if (CHECK_NULL_PATH(data, data_len)) {
RETURN_FALSE;
}
stream = php_stream_open_wrapper_ex(data, "rb", REPORT_ERRORS, NULL, DEFAULT_CONTEXT);
if (!stream) {
/* Stream will report errors opening file */
RETURN_FALSE;
}
}
context = emalloc(ops->context_size);
ops->hash_init(context);
if (isfilename) {
char buf[1024];
int n;
while ((n = php_stream_read(stream, buf, sizeof(buf))) > 0) {
ops->hash_update(context, (unsigned char *) buf, n);
}
php_stream_close(stream);
} else {
ops->hash_update(context, (unsigned char *) data, data_len);
}
digest = zend_string_alloc(ops->digest_size, 0);
ops->hash_final((unsigned char *) digest->val, context);
efree(context);
if (raw_output) {
digest->val[ops->digest_size] = 0;
RETURN_STR(digest);
} else {
zend_string *hex_digest = zend_string_safe_alloc(ops->digest_size, 2, 0, 0);
php_hash_bin2hex(hex_digest->val, (unsigned char *) digest->val, ops->digest_size);
hex_digest->val[2 * ops->digest_size] = 0;
zend_string_release(digest);
RETURN_STR(hex_digest);
}
}
/* }}} */
/* {{{ proto string hash(string algo, string data[, bool raw_output = false])
Generate a hash of a given input string
Returns lowercase hexits by default */
PHP_FUNCTION(hash)
{
php_hash_do_hash(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0, 0);
}
/* }}} */
/* {{{ proto string hash_file(string algo, string filename[, bool raw_output = false])
Generate a hash of a given file
Returns lowercase hexits by default */
PHP_FUNCTION(hash_file)
{
php_hash_do_hash(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1, 0);
}
/* }}} */
static inline void php_hash_string_xor_char(unsigned char *out, const unsigned char *in, const unsigned char xor_with, const int length) {
int i;
for (i=0; i < length; i++) {
out[i] = in[i] ^ xor_with;
}
}
static inline void php_hash_string_xor(unsigned char *out, const unsigned char *in, const unsigned char *xor_with, const int length) {
int i;
for (i=0; i < length; i++) {
out[i] = in[i] ^ xor_with[i];
}
}
static inline void php_hash_hmac_prep_key(unsigned char *K, const php_hash_ops *ops, void *context, const unsigned char *key, const size_t key_len) {
memset(K, 0, ops->block_size);
if (key_len > ops->block_size) {
/* Reduce the key first */
ops->hash_init(context);
ops->hash_update(context, key, key_len);
ops->hash_final(K, context);
} else {
memcpy(K, key, key_len);
}
/* XOR the key with 0x36 to get the ipad) */
php_hash_string_xor_char(K, K, 0x36, ops->block_size);
}
static inline void php_hash_hmac_round(unsigned char *final, const php_hash_ops *ops, void *context, const unsigned char *key, const unsigned char *data, const zend_long data_size) {
ops->hash_init(context);
ops->hash_update(context, key, ops->block_size);
ops->hash_update(context, data, data_size);
ops->hash_final(final, context);
}
static void php_hash_do_hash_hmac(INTERNAL_FUNCTION_PARAMETERS, int isfilename, zend_bool raw_output_default) /* {{{ */
{
zend_string *digest;
char *algo, *data, *key;
unsigned char *K;
size_t algo_len, data_len, key_len;
zend_bool raw_output = raw_output_default;
const php_hash_ops *ops;
void *context;
php_stream *stream = NULL;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "sss|b", &algo, &algo_len, &data, &data_len,
&key, &key_len, &raw_output) == FAILURE) {
return;
}
ops = php_hash_fetch_ops(algo, algo_len);
if (!ops) {
php_error_docref(NULL, E_WARNING, "Unknown hashing algorithm: %s", algo);
RETURN_FALSE;
}
if (isfilename) {
stream = php_stream_open_wrapper_ex(data, "rb", REPORT_ERRORS, NULL, DEFAULT_CONTEXT);
if (!stream) {
/* Stream will report errors opening file */
RETURN_FALSE;
}
}
context = emalloc(ops->context_size);
K = emalloc(ops->block_size);
digest = zend_string_alloc(ops->digest_size, 0);
php_hash_hmac_prep_key(K, ops, context, (unsigned char *) key, key_len);
if (isfilename) {
char buf[1024];
int n;
ops->hash_init(context);
ops->hash_update(context, K, ops->block_size);
while ((n = php_stream_read(stream, buf, sizeof(buf))) > 0) {
ops->hash_update(context, (unsigned char *) buf, n);
}
php_stream_close(stream);
ops->hash_final((unsigned char *) digest->val, context);
} else {
php_hash_hmac_round((unsigned char *) digest->val, ops, context, K, (unsigned char *) data, data_len);
}
php_hash_string_xor_char(K, K, 0x6A, ops->block_size);
php_hash_hmac_round((unsigned char *) digest->val, ops, context, K, (unsigned char *) digest->val, ops->digest_size);
/* Zero the key */
ZEND_SECURE_ZERO(K, ops->block_size);
efree(K);
efree(context);
if (raw_output) {
digest->val[ops->digest_size] = 0;
RETURN_STR(digest);
} else {
zend_string *hex_digest = zend_string_safe_alloc(ops->digest_size, 2, 0, 0);
php_hash_bin2hex(hex_digest->val, (unsigned char *) digest->val, ops->digest_size);
hex_digest->val[2 * ops->digest_size] = 0;
zend_string_release(digest);
RETURN_STR(hex_digest);
}
}
/* }}} */
/* {{{ proto string hash_hmac(string algo, string data, string key[, bool raw_output = false])
Generate a hash of a given input string with a key using HMAC
Returns lowercase hexits by default */
PHP_FUNCTION(hash_hmac)
{
php_hash_do_hash_hmac(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0, 0);
}
/* }}} */
/* {{{ proto string hash_hmac_file(string algo, string filename, string key[, bool raw_output = false])
Generate a hash of a given file with a key using HMAC
Returns lowercase hexits by default */
PHP_FUNCTION(hash_hmac_file)
{
php_hash_do_hash_hmac(INTERNAL_FUNCTION_PARAM_PASSTHRU, 1, 0);
}
/* }}} */
/* {{{ proto resource hash_init(string algo[, int options, string key])
Initialize a hashing context */
PHP_FUNCTION(hash_init)
{
char *algo, *key = NULL;
size_t algo_len, key_len = 0;
int argc = ZEND_NUM_ARGS();
zend_long options = 0;
void *context;
const php_hash_ops *ops;
php_hash_data *hash;
if (zend_parse_parameters(argc, "s|ls", &algo, &algo_len, &options, &key, &key_len) == FAILURE) {
return;
}
ops = php_hash_fetch_ops(algo, algo_len);
if (!ops) {
php_error_docref(NULL, E_WARNING, "Unknown hashing algorithm: %s", algo);
RETURN_FALSE;
}
if (options & PHP_HASH_HMAC &&
key_len <= 0) {
/* Note: a zero length key is no key at all */
php_error_docref(NULL, E_WARNING, "HMAC requested without a key");
RETURN_FALSE;
}
context = emalloc(ops->context_size);
ops->hash_init(context);
hash = emalloc(sizeof(php_hash_data));
hash->ops = ops;
hash->context = context;
hash->options = options;
hash->key = NULL;
if (options & PHP_HASH_HMAC) {
char *K = emalloc(ops->block_size);
int i;
memset(K, 0, ops->block_size);
if (key_len > ops->block_size) {
/* Reduce the key first */
ops->hash_update(context, (unsigned char *) key, key_len);
ops->hash_final((unsigned char *) K, context);
/* Make the context ready to start over */
ops->hash_init(context);
} else {
memcpy(K, key, key_len);
}
/* XOR ipad */
for(i=0; i < ops->block_size; i++) {
K[i] ^= 0x36;
}
ops->hash_update(context, (unsigned char *) K, ops->block_size);
hash->key = (unsigned char *) K;
}
ZEND_REGISTER_RESOURCE(return_value, hash, php_hash_le_hash);
}
/* }}} */
/* {{{ proto bool hash_update(resource context, string data)
Pump data into the hashing algorithm */
PHP_FUNCTION(hash_update)
{
zval *zhash;
php_hash_data *hash;
char *data;
size_t data_len;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "rs", &zhash, &data, &data_len) == FAILURE) {
return;
}
ZEND_FETCH_RESOURCE(hash, php_hash_data*, zhash, -1, PHP_HASH_RESNAME, php_hash_le_hash);
hash->ops->hash_update(hash->context, (unsigned char *) data, data_len);
RETURN_TRUE;
}
/* }}} */
/* {{{ proto int hash_update_stream(resource context, resource handle[, integer length])
Pump data into the hashing algorithm from an open stream */
PHP_FUNCTION(hash_update_stream)
{
zval *zhash, *zstream;
php_hash_data *hash;
php_stream *stream = NULL;
zend_long length = -1, didread = 0;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "rr|l", &zhash, &zstream, &length) == FAILURE) {
return;
}
ZEND_FETCH_RESOURCE(hash, php_hash_data*, zhash, -1, PHP_HASH_RESNAME, php_hash_le_hash);
php_stream_from_zval(stream, zstream);
while (length) {
char buf[1024];
zend_long n, toread = 1024;
if (length > 0 && toread > length) {
toread = length;
}
if ((n = php_stream_read(stream, buf, toread)) <= 0) {
/* Nada mas */
RETURN_LONG(didread);
}
hash->ops->hash_update(hash->context, (unsigned char *) buf, n);
length -= n;
didread += n;
}
RETURN_LONG(didread);
}
/* }}} */
/* {{{ proto bool hash_update_file(resource context, string filename[, resource context])
Pump data into the hashing algorithm from a file */
PHP_FUNCTION(hash_update_file)
{
zval *zhash, *zcontext = NULL;
php_hash_data *hash;
php_stream_context *context;
php_stream *stream;
char *filename, buf[1024];
size_t filename_len, n;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "rs|r", &zhash, &filename, &filename_len, &zcontext) == FAILURE) {
return;
}
ZEND_FETCH_RESOURCE(hash, php_hash_data*, zhash, -1, PHP_HASH_RESNAME, php_hash_le_hash);
context = php_stream_context_from_zval(zcontext, 0);
stream = php_stream_open_wrapper_ex(filename, "rb", REPORT_ERRORS, NULL, context);
if (!stream) {
/* Stream will report errors opening file */
RETURN_FALSE;
}
while ((n = php_stream_read(stream, buf, sizeof(buf))) > 0) {
hash->ops->hash_update(hash->context, (unsigned char *) buf, n);
}
php_stream_close(stream);
RETURN_TRUE;
}
/* }}} */
/* {{{ proto string hash_final(resource context[, bool raw_output=false])
Output resulting digest */
PHP_FUNCTION(hash_final)
{
zval *zhash;
php_hash_data *hash;
zend_bool raw_output = 0;
zend_string *digest;
int digest_len;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "r|b", &zhash, &raw_output) == FAILURE) {
return;
}
ZEND_FETCH_RESOURCE(hash, php_hash_data*, zhash, -1, PHP_HASH_RESNAME, php_hash_le_hash);
digest_len = hash->ops->digest_size;
digest = zend_string_alloc(digest_len, 0);
hash->ops->hash_final((unsigned char *) digest->val, hash->context);
if (hash->options & PHP_HASH_HMAC) {
int i;
/* Convert K to opad -- 0x6A = 0x36 ^ 0x5C */
for(i=0; i < hash->ops->block_size; i++) {
hash->key[i] ^= 0x6A;
}
/* Feed this result into the outter hash */
hash->ops->hash_init(hash->context);
hash->ops->hash_update(hash->context, hash->key, hash->ops->block_size);
hash->ops->hash_update(hash->context, (unsigned char *) digest->val, hash->ops->digest_size);
hash->ops->hash_final((unsigned char *) digest->val, hash->context);
/* Zero the key */
ZEND_SECURE_ZERO(hash->key, hash->ops->block_size);
efree(hash->key);
hash->key = NULL;
}
digest->val[digest_len] = 0;
efree(hash->context);
hash->context = NULL;
//???
//??? /* zend_list_REAL_delete() */
//??? if (zend_hash_index_find(&EG(regular_list), Z_RESVAL_P(zhash), (void *) &le)==SUCCESS) {
//??? /* This is a hack to avoid letting the resource hide elsewhere (like in separated vars)
//??? FETCH_RESOURCE is intelligent enough to handle dealing with any issues this causes */
//??? le->refcount = 1;
//??? } /* FAILURE is not an option */
zend_list_close(Z_RES_P(zhash));
if (raw_output) {
RETURN_STR(digest);
} else {
zend_string *hex_digest = zend_string_safe_alloc(digest_len, 2, 0, 0);
php_hash_bin2hex(hex_digest->val, (unsigned char *) digest->val, digest_len);
hex_digest->val[2 * digest_len] = 0;
zend_string_release(digest);
RETURN_STR(hex_digest);
}
}
/* }}} */
/* {{{ proto resource hash_copy(resource context)
Copy hash resource */
PHP_FUNCTION(hash_copy)
{
zval *zhash;
php_hash_data *hash, *copy_hash;
void *context;
int res;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "r", &zhash) == FAILURE) {
return;
}
ZEND_FETCH_RESOURCE(hash, php_hash_data*, zhash, -1, PHP_HASH_RESNAME, php_hash_le_hash);
context = emalloc(hash->ops->context_size);
hash->ops->hash_init(context);
res = hash->ops->hash_copy(hash->ops, hash->context, context);
if (res != SUCCESS) {
efree(context);
RETURN_FALSE;
}
copy_hash = emalloc(sizeof(php_hash_data));
copy_hash->ops = hash->ops;
copy_hash->context = context;
copy_hash->options = hash->options;
copy_hash->key = ecalloc(1, hash->ops->block_size);
if (hash->key) {
memcpy(copy_hash->key, hash->key, hash->ops->block_size);
}
ZEND_REGISTER_RESOURCE(return_value, copy_hash, php_hash_le_hash);
}
/* }}} */
/* {{{ proto array hash_algos(void)
Return a list of registered hashing algorithms */
PHP_FUNCTION(hash_algos)
{
zend_string *str;
array_init(return_value);
ZEND_HASH_FOREACH_STR_KEY(&php_hash_hashtable, str) {
add_next_index_str(return_value, zend_string_copy(str));
} ZEND_HASH_FOREACH_END();
}
/* }}} */
/* {{{ proto string hash_pbkdf2(string algo, string password, string salt, int iterations [, int length = 0, bool raw_output = false])
Generate a PBKDF2 hash of the given password and salt
Returns lowercase hexits by default */
PHP_FUNCTION(hash_pbkdf2)
{
zend_string *returnval;
char *algo, *salt, *pass = NULL;
unsigned char *computed_salt, *digest, *temp, *result, *K1, *K2 = NULL;
zend_long loops, i, j, iterations, digest_length = 0, length = 0;
size_t algo_len, pass_len, salt_len = 0;
zend_bool raw_output = 0;
const php_hash_ops *ops;
void *context;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "sssl|lb", &algo, &algo_len, &pass, &pass_len, &salt, &salt_len, &iterations, &length, &raw_output) == FAILURE) {
return;
}
ops = php_hash_fetch_ops(algo, algo_len);
if (!ops) {
php_error_docref(NULL, E_WARNING, "Unknown hashing algorithm: %s", algo);
RETURN_FALSE;
}
if (iterations <= 0) {
php_error_docref(NULL, E_WARNING, "Iterations must be a positive integer: " ZEND_LONG_FMT, iterations);
RETURN_FALSE;
}
if (length < 0) {
php_error_docref(NULL, E_WARNING, "Length must be greater than or equal to 0: " ZEND_LONG_FMT, length);
RETURN_FALSE;
}
if (salt_len > INT_MAX - 4) {
php_error_docref(NULL, E_WARNING, "Supplied salt is too long, max of INT_MAX - 4 bytes: %zd supplied", salt_len);
RETURN_FALSE;
}
context = emalloc(ops->context_size);
ops->hash_init(context);
K1 = emalloc(ops->block_size);
K2 = emalloc(ops->block_size);
digest = emalloc(ops->digest_size);
temp = emalloc(ops->digest_size);
/* Setup Keys that will be used for all hmac rounds */
php_hash_hmac_prep_key(K1, ops, context, (unsigned char *) pass, pass_len);
/* Convert K1 to opad -- 0x6A = 0x36 ^ 0x5C */
php_hash_string_xor_char(K2, K1, 0x6A, ops->block_size);
/* Setup Main Loop to build a long enough result */
if (length == 0) {
length = ops->digest_size;
if (!raw_output) {
length = length * 2;
}
}
digest_length = length;
if (!raw_output) {
digest_length = (zend_long) ceil((float) length / 2.0);
}
loops = (zend_long) ceil((float) digest_length / (float) ops->digest_size);
result = safe_emalloc(loops, ops->digest_size, 0);
computed_salt = safe_emalloc(salt_len, 1, 4);
memcpy(computed_salt, (unsigned char *) salt, salt_len);
for (i = 1; i <= loops; i++) {
/* digest = hash_hmac(salt + pack('N', i), password) { */
/* pack("N", i) */
computed_salt[salt_len] = (unsigned char) (i >> 24);
computed_salt[salt_len + 1] = (unsigned char) ((i & 0xFF0000) >> 16);
computed_salt[salt_len + 2] = (unsigned char) ((i & 0xFF00) >> 8);
computed_salt[salt_len + 3] = (unsigned char) (i & 0xFF);
php_hash_hmac_round(digest, ops, context, K1, computed_salt, (zend_long) salt_len + 4);
php_hash_hmac_round(digest, ops, context, K2, digest, ops->digest_size);
/* } */
/* temp = digest */
memcpy(temp, digest, ops->digest_size);
/*
* Note that the loop starting at 1 is intentional, since we've already done
* the first round of the algorithm.
*/
for (j = 1; j < iterations; j++) {
/* digest = hash_hmac(digest, password) { */
php_hash_hmac_round(digest, ops, context, K1, digest, ops->digest_size);
php_hash_hmac_round(digest, ops, context, K2, digest, ops->digest_size);
/* } */
/* temp ^= digest */
php_hash_string_xor(temp, temp, digest, ops->digest_size);
}
/* result += temp */
memcpy(result + ((i - 1) * ops->digest_size), temp, ops->digest_size);
}
/* Zero potentially sensitive variables */
ZEND_SECURE_ZERO(K1, ops->block_size);
ZEND_SECURE_ZERO(K2, ops->block_size);
ZEND_SECURE_ZERO(computed_salt, salt_len + 4);
efree(K1);
efree(K2);
efree(computed_salt);
efree(context);
efree(digest);
efree(temp);
returnval = zend_string_alloc(length, 0);
if (raw_output) {
memcpy(returnval->val, result, length);
} else {
php_hash_bin2hex(returnval->val, result, digest_length);
}
returnval->val[length] = 0;
efree(result);
RETURN_STR(returnval);
}
/* }}} */
/* {{{ proto bool hash_equals(string known_string, string user_string)
Compares two strings using the same time whether they're equal or not.
A difference in length will leak */
PHP_FUNCTION(hash_equals)
{
zval *known_zval, *user_zval;
char *known_str, *user_str;
int result = 0, j;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "zz", &known_zval, &user_zval) == FAILURE) {
return;
}
/* We only allow comparing string to prevent unexpected results. */
if (Z_TYPE_P(known_zval) != IS_STRING) {
php_error_docref(NULL, E_WARNING, "Expected known_string to be a string, %s given", zend_zval_type_name(known_zval));
RETURN_FALSE;
}
if (Z_TYPE_P(user_zval) != IS_STRING) {
php_error_docref(NULL, E_WARNING, "Expected user_string to be a string, %s given", zend_zval_type_name(user_zval));
RETURN_FALSE;
}
if (Z_STRLEN_P(known_zval) != Z_STRLEN_P(user_zval)) {
RETURN_FALSE;
}
known_str = Z_STRVAL_P(known_zval);
user_str = Z_STRVAL_P(user_zval);
/* This is security sensitive code. Do not optimize this for speed. */
for (j = 0; j < Z_STRLEN_P(known_zval); j++) {
result |= known_str[j] ^ user_str[j];
}
RETURN_BOOL(0 == result);
}
/* }}} */
/* Module Housekeeping */
static void php_hash_dtor(zend_resource *rsrc) /* {{{ */
{
php_hash_data *hash = (php_hash_data*)rsrc->ptr;
/* Just in case the algo has internally allocated resources */
if (hash->context) {
unsigned char *dummy = emalloc(hash->ops->digest_size);
hash->ops->hash_final(dummy, hash->context);
efree(dummy);
efree(hash->context);
}
if (hash->key) {
memset(hash->key, 0, hash->ops->block_size);
efree(hash->key);
}
efree(hash);
}
/* }}} */
#define PHP_HASH_HAVAL_REGISTER(p,b) php_hash_register_algo("haval" #b "," #p , &php_hash_##p##haval##b##_ops);
#ifdef PHP_MHASH_BC
PHP_MINFO_FUNCTION(mhash)
{
php_info_print_table_start();
php_info_print_table_row(2, "MHASH support", "Enabled");
php_info_print_table_row(2, "MHASH API Version", "Emulated Support");
php_info_print_table_end();
}
zend_module_entry mhash_module_entry = {
STANDARD_MODULE_HEADER,
"mhash",
NULL,
NULL,
NULL,
NULL,
NULL,
PHP_MINFO(mhash),
NO_VERSION_YET,
STANDARD_MODULE_PROPERTIES,
};
static void mhash_init(INIT_FUNC_ARGS)
{
char buf[128];
int len;
int algo_number = 0;
for (algo_number = 0; algo_number < MHASH_NUM_ALGOS; algo_number++) {
struct mhash_bc_entry algorithm = mhash_to_hash[algo_number];
if (algorithm.mhash_name == NULL) {
continue;
}
len = slprintf(buf, 127, "MHASH_%s", algorithm.mhash_name, strlen(algorithm.mhash_name));
zend_register_long_constant(buf, len, algorithm.value, CONST_CS | CONST_PERSISTENT, module_number);
}
zend_register_internal_module(&mhash_module_entry);
}
/* {{{ proto string mhash(int hash, string data [, string key])
Hash data with hash */
PHP_FUNCTION(mhash)
{
zval *z_algorithm;
zend_long algorithm;
if (zend_parse_parameters(1, "z", &z_algorithm) == FAILURE) {
return;
}
SEPARATE_ZVAL(z_algorithm);
convert_to_long_ex(z_algorithm);
algorithm = Z_LVAL_P(z_algorithm);
/* need to convert the first parameter from int constant to string algorithm name */
if (algorithm >= 0 && algorithm < MHASH_NUM_ALGOS) {
struct mhash_bc_entry algorithm_lookup = mhash_to_hash[algorithm];
if (algorithm_lookup.hash_name) {
ZVAL_STRING(z_algorithm, algorithm_lookup.hash_name);
}
}
if (ZEND_NUM_ARGS() == 3) {
php_hash_do_hash_hmac(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0, 1);
} else if (ZEND_NUM_ARGS() == 2) {
php_hash_do_hash(INTERNAL_FUNCTION_PARAM_PASSTHRU, 0, 1);
} else {
WRONG_PARAM_COUNT;
}
}
/* }}} */
/* {{{ proto string mhash_get_hash_name(int hash)
Gets the name of hash */
PHP_FUNCTION(mhash_get_hash_name)
{
zend_long algorithm;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &algorithm) == FAILURE) {
return;
}
if (algorithm >= 0 && algorithm < MHASH_NUM_ALGOS) {
struct mhash_bc_entry algorithm_lookup = mhash_to_hash[algorithm];
if (algorithm_lookup.mhash_name) {
RETURN_STRING(algorithm_lookup.mhash_name);
}
}
RETURN_FALSE;
}
/* }}} */
/* {{{ proto int mhash_count(void)
Gets the number of available hashes */
PHP_FUNCTION(mhash_count)
{
if (zend_parse_parameters_none() == FAILURE) {
return;
}
RETURN_LONG(MHASH_NUM_ALGOS - 1);
}
/* }}} */
/* {{{ proto int mhash_get_block_size(int hash)
Gets the block size of hash */
PHP_FUNCTION(mhash_get_block_size)
{
zend_long algorithm;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &algorithm) == FAILURE) {
return;
}
RETVAL_FALSE;
if (algorithm >= 0 && algorithm < MHASH_NUM_ALGOS) {
struct mhash_bc_entry algorithm_lookup = mhash_to_hash[algorithm];
if (algorithm_lookup.mhash_name) {
const php_hash_ops *ops = php_hash_fetch_ops(algorithm_lookup.hash_name, strlen(algorithm_lookup.hash_name));
if (ops) {
RETVAL_LONG(ops->digest_size);
}
}
}
}
/* }}} */
#define SALT_SIZE 8
/* {{{ proto string mhash_keygen_s2k(int hash, string input_password, string salt, int bytes)
Generates a key using hash functions */
PHP_FUNCTION(mhash_keygen_s2k)
{
zend_long algorithm, l_bytes;
int bytes;
char *password, *salt;
size_t password_len, salt_len;
char padded_salt[SALT_SIZE];
if (zend_parse_parameters(ZEND_NUM_ARGS(), "lssl", &algorithm, &password, &password_len, &salt, &salt_len, &l_bytes) == FAILURE) {
return;
}
bytes = (int)l_bytes;
if (bytes <= 0){
php_error_docref(NULL, E_WARNING, "the byte parameter must be greater than 0");
RETURN_FALSE;
}
salt_len = MIN(salt_len, SALT_SIZE);
memcpy(padded_salt, salt, salt_len);
if (salt_len < SALT_SIZE) {
memset(padded_salt + salt_len, 0, SALT_SIZE - salt_len);
}
salt_len = SALT_SIZE;
RETVAL_FALSE;
if (algorithm >= 0 && algorithm < MHASH_NUM_ALGOS) {
struct mhash_bc_entry algorithm_lookup = mhash_to_hash[algorithm];
if (algorithm_lookup.mhash_name) {
const php_hash_ops *ops = php_hash_fetch_ops(algorithm_lookup.hash_name, strlen(algorithm_lookup.hash_name));
if (ops) {
unsigned char null = '\0';
void *context;
char *key, *digest;
int i = 0, j = 0;
int block_size = ops->digest_size;
int times = bytes / block_size;
if (bytes % block_size != 0) times++;
context = emalloc(ops->context_size);
ops->hash_init(context);
key = ecalloc(1, times * block_size);
digest = emalloc(ops->digest_size + 1);
for (i = 0; i < times; i++) {
ops->hash_init(context);
for (j=0;j<i;j++) {
ops->hash_update(context, &null, 1);
}
ops->hash_update(context, (unsigned char *)padded_salt, salt_len);
ops->hash_update(context, (unsigned char *)password, password_len);
ops->hash_final((unsigned char *)digest, context);
memcpy( &key[i*block_size], digest, block_size);
}
RETVAL_STRINGL(key, bytes);
ZEND_SECURE_ZERO(key, bytes);
efree(digest);
efree(context);
efree(key);
}
}
}
}
/* }}} */
#endif
/* {{{ PHP_MINIT_FUNCTION
*/
PHP_MINIT_FUNCTION(hash)
{
php_hash_le_hash = zend_register_list_destructors_ex(php_hash_dtor, NULL, PHP_HASH_RESNAME, module_number);
zend_hash_init(&php_hash_hashtable, 35, NULL, NULL, 1);
php_hash_register_algo("md2", &php_hash_md2_ops);
php_hash_register_algo("md4", &php_hash_md4_ops);
php_hash_register_algo("md5", &php_hash_md5_ops);