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php-src/ext/standard/password.c

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2012 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: Anthony Ferrara <ircmaxell@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include <stdlib.h>
#include "php.h"
#if HAVE_CRYPT
#include "php_crypt.h"
#endif
#include "php_password.h"
#include "php_rand.h"
#include "base64.h"
PHP_MINIT_FUNCTION(password) /* {{{ */
{
REGISTER_STRING_CONSTANT("PASSWORD_DEFAULT", PHP_PASSWORD_DEFAULT, CONST_CS | CONST_PERSISTENT);
REGISTER_STRING_CONSTANT("PASSWORD_BCRYPT", PHP_PASSWORD_BCRYPT, CONST_CS | CONST_PERSISTENT);
REGISTER_STRING_CONSTANT("PASSWORD_MD5", PHP_PASSWORD_MD5, CONST_CS | CONST_PERSISTENT);
REGISTER_STRING_CONSTANT("PASSWORD_SHA256", PHP_PASSWORD_SHA256, CONST_CS | CONST_PERSISTENT);
REGISTER_STRING_CONSTANT("PASSWORD_SHA512", PHP_PASSWORD_SHA512, CONST_CS | CONST_PERSISTENT);
return SUCCESS;
}
/* }}} */
static int php_password_salt_is_alphabet(const char *str, const int len)
{
int i = 0;
for (i = 0; i < len; i++) {
if (!((str[i] >= 'A' && str[i] <= 'Z') || (str[i] >= 'a' && str[i] <= 'z') || (str[i] >= '0' && str[i] <= '9') || str[i] == '.' || str[i] == '/')) {
return 0;
}
}
return 1;
}
static int php_password_salt_to64(const char *str, const int str_len, const int out_len, char *ret)
{
int pos = 0;
unsigned char *buffer;
buffer = php_base64_encode((unsigned char*) str, str_len, NULL);
for (pos = 0; pos < out_len; pos++) {
if (buffer[pos] == '+') {
ret[pos] = '.';
} else if (buffer[pos] == '=') {
efree(buffer);
return FAILURE;
} else {
ret[pos] = buffer[pos];
}
}
efree(buffer);
return SUCCESS;
}
static int php_password_make_salt(int length, int raw, char *ret)
{
int i, raw_length;
char *buffer;
if (raw) {
raw_length = length;
} else {
raw_length = length * 3 / 4 + 1;
}
buffer = (char *) emalloc(raw_length + 1);
/* Temp Placeholder */
for (i = 0; i < raw_length; i++) {
buffer[i] = i;
}
/* /Temp Placeholder */
if (raw) {
memcpy(ret, buffer, length);
} else {
char *result;
result = emalloc(length + 1);
if (php_password_salt_to64(buffer, raw_length, length, result) == FAILURE) {
php_error_docref(NULL, E_WARNING, "Generated salt too short");
efree(buffer);
efree(result);
return FAILURE;
} else {
memcpy(ret, result, length);
efree(result);
}
}
efree(buffer);
ret[length] = 0;
return SUCCESS;
}
PHP_FUNCTION(password_verify)
{
}
PHP_FUNCTION(password_make_salt)
{
char *salt;
int length = 0;
zend_bool raw_output = 0;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l|b", &length, &raw_output) == FAILURE) {
RETURN_FALSE;
}
if (length <= 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Length cannot be less than or equal zero: %d", length);
RETURN_FALSE;
}
salt = emalloc(length + 1);
if (php_password_make_salt(length, (int) raw_output, salt) == FAILURE) {
efree(salt);
RETURN_FALSE;
}
RETURN_STRINGL(salt, length, 0);
}
/* {{{ proto string password(string password, string algo = PASSWORD_DEFAULT, array options = array())
Hash a password */
PHP_FUNCTION(password_create)
{
char *password, *algo = 0, *hash_format, *hash, *salt;
int password_len, algo_len = 0, salt_len = 0, required_salt_len = 0, hash_format_len;
HashTable *options = 0;
zval **option_buffer;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|sH", &password, &password_len, &algo, &algo_len, &options) == FAILURE) {
RETURN_FALSE;
}
if (algo_len == 0) {
algo = PHP_PASSWORD_DEFAULT;
algo_len = strlen(PHP_PASSWORD_DEFAULT);
}
if (strcmp(algo, PHP_PASSWORD_BCRYPT) == 0) {
int cost = PHP_PASSWORD_BCRYPT_DEFAULT_COST;
if (options && zend_symtable_find(options, "cost", 5, (void **) &option_buffer) == SUCCESS) {
convert_to_long_ex(option_buffer);
cost = Z_LVAL_PP(option_buffer);
zval_ptr_dtor(option_buffer);
if (cost < 4 || cost > 31) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid bcrypt cost parameter specified: %d", cost);
RETURN_FALSE;
}
}
required_salt_len = 22;
hash_format = emalloc(8);
sprintf(hash_format, "$2y$%02d$", cost);
hash_format_len = 7;
} else if (strcmp(algo, PHP_PASSWORD_MD5) == 0) {
required_salt_len = 12;
hash_format = emalloc(4);
memcpy(hash_format, "$1$", 3);
hash_format_len = 3;
} else if (strcmp(algo, PHP_PASSWORD_SHA256) == 0 || strcmp(algo, PHP_PASSWORD_SHA512) == 0) {
int rounds = PHP_PASSWORD_SHA_DEFAULT_ROUNDS;
if (options && zend_symtable_find(options, "rounds", 7, (void **) &option_buffer) == SUCCESS) {
convert_to_long_ex(option_buffer);
rounds = Z_LVAL_PP(option_buffer);
zval_ptr_dtor(option_buffer);
if (rounds < 1000 || rounds > 999999999) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid SHA rounds parameter specified: %d", rounds);
RETURN_FALSE;
}
}
required_salt_len = 16;
hash_format = emalloc(21);
sprintf(hash_format, "$%s$rounds=%d$", algo, rounds);
hash_format_len = strlen(hash_format);
} else {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unknown password hashing algorithm: %s", algo);
RETURN_FALSE;
}
if (options && zend_symtable_find(options, "salt", 5, (void**) &option_buffer) == SUCCESS) {
char *buffer;
int buffer_len;
if (Z_TYPE_PP(option_buffer) == IS_STRING) {
buffer = Z_STRVAL_PP(option_buffer);
buffer_len = Z_STRLEN_PP(option_buffer);
} else {
zval_ptr_dtor(option_buffer);
efree(hash_format);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Non-string salt parameter supplied");
RETURN_FALSE;
}
if (buffer_len < required_salt_len) {
efree(hash_format);
zval_ptr_dtor(option_buffer);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Provided salt is too short: %d expecting %d", buffer_len, required_salt_len);
RETURN_FALSE;
} else if (0 == php_password_salt_is_alphabet(buffer, buffer_len)) {
salt = emalloc(required_salt_len + 1);
if (php_password_salt_to64(buffer, buffer_len, required_salt_len, salt) == FAILURE) {
efree(hash_format);
zval_ptr_dtor(option_buffer);
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Provided salt is too short: %d", salt_len);
RETURN_FALSE;
}
salt_len = required_salt_len;
} else {
salt = emalloc(required_salt_len + 1);
memcpy(salt, buffer, required_salt_len);
salt_len = required_salt_len;
}
zval_ptr_dtor(option_buffer);
} else {
salt = emalloc(required_salt_len + 1);
if (php_password_make_salt(required_salt_len, 0, salt) == FAILURE) {
efree(hash_format);
efree(salt);
RETURN_FALSE;
}
salt_len = required_salt_len;
}
salt[salt_len] = 0;
hash = emalloc(salt_len + hash_format_len + 1);
sprintf(hash, "%s%s", hash_format, salt);
hash[hash_format_len + salt_len] = 0;
efree(hash_format);
efree(salt);
RETURN_STRINGL(hash, hash_format_len + salt_len, 0);
}
/* }}} */
/*
* 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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