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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"
#include "fcntl.h"
#include "php_password.h"
#include "php_rand.h"
#include "base64.h"
#include "zend_interfaces.h"
#include "info.h"
#if PHP_WIN32
#include "win32/winutil.h"
#endif
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);
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;
}
#define PHP_PASSWORD_FUNCTION_EXISTS(func, func_len) (zend_hash_find(EG(function_table), (func), (func_len) + 1, (void **) &func_ptr) == SUCCESS && func_ptr->type == ZEND_INTERNAL_FUNCTION && func_ptr->internal_function.handler != zif_display_disabled_function)
static int php_password_make_salt(int length, int raw, char *ret TSRMLS_DC)
{
int i, raw_length, buffer_valid = 0;
char *buffer;
if (raw) {
raw_length = length;
} else {
raw_length = length * 3 / 4 + 1;
}
buffer = (char *) emalloc(raw_length + 1);
#if PHP_WIN32
{
BYTE *iv_b = (BYTE *) buffer;
if (php_win32_get_random_bytes(iv_b, (size_t) raw_length) == SUCCESS) {
buffer_valid = 1;
}
}
#else
{
int fd, n;
size_t read_bytes = 0;
fd = open("/dev/urandom", O_RDONLY);
if (fd >= 0) {
while (read_bytes < raw_length) {
n = read(fd, buffer + read_bytes, raw_length - read_bytes);
if (n < 0) {
break;
}
read_bytes += n;
}
close(fd);
}
if (read_bytes == raw_length) {
buffer_valid = 1;
}
}
#endif
if (!buffer_valid) {
for (i = 0; i < raw_length; i++) {
buffer[i] ^= (char) (255.0 * php_rand(TSRMLS_C) / RAND_MAX);
}
}
/* /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 TSRMLS_CC, 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)
{
zval *password, *hash, *ret;
int status = 0, i;
zend_function *func_ptr;
if (!PHP_PASSWORD_FUNCTION_EXISTS("crypt", 5)) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Crypt must be loaded for password_verify to function");
RETURN_FALSE;
}
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "zz", &password, &hash) == FAILURE) {
RETURN_FALSE;
}
zend_call_method_with_2_params(NULL, NULL, NULL, "crypt", &ret, password, hash);
if (Z_TYPE_P(ret) != IS_STRING) {
zval_ptr_dtor(&ret);
RETURN_FALSE;
}
if (Z_STRLEN_P(ret) != Z_STRLEN_P(hash)) {
zval_ptr_dtor(&ret);
RETURN_FALSE;
}
for (i = 0; i < Z_STRLEN_P(ret); i++) {
status |= (Z_STRVAL_P(ret)[i] ^ Z_STRVAL_P(hash)[i]);
}
zval_ptr_dtor(&ret);
RETURN_BOOL(status == 0);
}
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 TSRMLS_CC) == FAILURE) {
efree(salt);
RETURN_FALSE;
}
RETURN_STRINGL(salt, length, 0);
}
/* {{{ proto string password_hash(string password, string algo = PASSWORD_DEFAULT, array options = array())
Hash a password */
PHP_FUNCTION(password_hash)
{
char *algo = 0, *hash_format, *hash, *salt;
int algo_len = 0, salt_len = 0, required_salt_len = 0, hash_format_len;
HashTable *options = 0;
zval **option_buffer, *ret, *password, *hash_zval;
zend_function *func_ptr;
if (!PHP_PASSWORD_FUNCTION_EXISTS("crypt", 5)) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Crypt must be loaded for password_hash to function");
RETURN_FALSE;
}
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z|sH", &password, &algo, &algo_len, &options) == FAILURE) {
RETURN_FALSE;
}
if (Z_TYPE_P(password) != IS_STRING) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Password must be a string");
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 {
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);
efree(salt);
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 TSRMLS_CC) == 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;
ALLOC_INIT_ZVAL(hash_zval);
ZVAL_STRINGL(hash_zval, hash, hash_format_len + salt_len, 0);
efree(hash_format);
efree(salt);
zend_call_method_with_2_params(NULL, NULL, NULL, "crypt", &ret, password, hash_zval);
zval_ptr_dtor(&hash_zval);
if (Z_TYPE_P(ret) != IS_STRING) {
zval_ptr_dtor(&ret);
RETURN_FALSE;
} else if(Z_STRLEN_P(ret) < 13) {
zval_ptr_dtor(&ret);
RETURN_FALSE;
}
RETURN_ZVAL(ret, 0, 1);
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
|
