Outsource all the BCrypt heavy lifting to a library
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1099858678
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b2e553ae1d
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@ -20,7 +20,8 @@
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"symfony/icu": "~1.0",
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"doctrine/common": "~2.2",
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"twig/twig": "~1.11",
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"psr/log": "~1.0"
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"psr/log": "~1.0",
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"ircmaxell/password-compat": "1.0.*"
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},
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"replace": {
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"symfony/browser-kit": "self.version",
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@ -12,7 +12,6 @@
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namespace Symfony\Component\Security\Core\Encoder;
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use Symfony\Component\Security\Core\Encoder\BasePasswordEncoder;
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use Symfony\Component\Security\Core\Util\SecureRandomInterface;
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/**
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* @author Elnur Abdurrakhimov <elnur@elnur.pro>
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@ -20,39 +19,26 @@ use Symfony\Component\Security\Core\Util\SecureRandomInterface;
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*/
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class BCryptPasswordEncoder extends BasePasswordEncoder
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{
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/**
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* @var SecureRandomInterface
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*/
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private $secureRandom;
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/**
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* @var string
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*/
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private $cost;
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private static $prefix = null;
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/**
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* Constructor.
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*
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* @param SecureRandomInterface $secureRandom A SecureRandomInterface instance
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* @param integer $cost The algorithmic cost that should be used
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* @param integer $cost The algorithmic cost that should be used
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*
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* @throws \InvalidArgumentException if cost is out of range
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*/
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public function __construct(SecureRandomInterface $secureRandom, $cost)
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public function __construct($cost)
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{
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$this->secureRandom = $secureRandom;
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$cost = (int) $cost;
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if ($cost < 4 || $cost > 31) {
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throw new \InvalidArgumentException('Cost must be in the range of 4-31.');
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}
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$this->cost = sprintf('%02d', $cost);
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if (!self::$prefix) {
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self::$prefix = '$'.(version_compare(phpversion(), '5.3.7', '>=') ? '2y' : '2a').'$';
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}
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$this->cost = sprintf('%02d', $cost);
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}
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/**
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@ -60,17 +46,9 @@ class BCryptPasswordEncoder extends BasePasswordEncoder
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*/
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public function encodePassword($raw, $salt)
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{
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if (function_exists('password_hash')) {
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return password_hash($raw, PASSWORD_BCRYPT, array('cost' => $this->cost));
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}
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$salt = self::$prefix.$this->cost.'$'.$this->encodeSalt($this->getRawSalt());
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$encoded = crypt($raw, $salt);
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if (!is_string($encoded) || strlen($encoded) <= 13) {
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return false;
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}
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return $encoded;
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return password_hash($raw, PASSWORD_BCRYPT, array(
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'cost' => $this->cost,
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));
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}
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/**
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@ -78,71 +56,6 @@ class BCryptPasswordEncoder extends BasePasswordEncoder
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*/
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public function isPasswordValid($encoded, $raw, $salt)
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{
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if (function_exists('password_verify')) {
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return password_verify($raw, $encoded);
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}
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$crypted = crypt($raw, $encoded);
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if (strlen($crypted) <= 13) {
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return false;
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}
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return $this->comparePasswords($encoded, $crypted);
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}
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/**
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* Encodes the salt to be used by Bcrypt.
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*
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* The blowfish/bcrypt algorithm used by PHP crypt expects a different
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* set and order of characters than the usual base64_encode function.
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* Regular b64: ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/
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* Bcrypt b64: ./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789
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* We care because the last character in our encoded string will
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* only represent 2 bits. While two known implementations of
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* bcrypt will happily accept and correct a salt string which
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* has the 4 unused bits set to non-zero, we do not want to take
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* chances and we also do not want to waste an additional byte
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* of entropy.
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*
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* @param bytes $random a string of 16 random bytes
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*
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* @return string Properly encoded salt to use with php crypt function
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*
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* @throws \InvalidArgumentException if string of random bytes is too short
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*/
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protected function encodeSalt($random)
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{
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$len = strlen($random);
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if ($len < 16) {
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throw new \InvalidArgumentException('The bcrypt salt needs 16 random bytes.');
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}
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if ($len > 16) {
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$random = substr($random, 0, 16);
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}
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$base64raw = str_replace('+', '.', base64_encode($random));
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$salt128bit = substr($base64raw, 0, 21);
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$lastchar = substr($base64raw, 21, 1);
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$lastchar = strtr($lastchar, 'AQgw', '.Oeu');
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$salt128bit .= $lastchar;
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return $salt128bit;
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}
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/**
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* @return bytes 16 random bytes to be used in the salt
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*/
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protected function getRawSalt()
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{
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$rawSalt = false;
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$numBytes = 16;
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if (function_exists('mcrypt_create_iv')) {
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$rawSalt = mcrypt_create_iv($numBytes, MCRYPT_DEV_URANDOM);
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}
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if (!$rawSalt) {
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$rawSalt = $this->secureRandom->nextBytes($numBytes);
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}
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return $rawSalt;
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return password_verify($raw, $encoded);
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}
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}
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@ -22,30 +22,12 @@ class BCryptPasswordEncoderTest extends \PHPUnit_Framework_TestCase
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const BYTES = '0123456789abcdef';
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const VALID_COST = '04';
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const SECURE_RANDOM_INTERFACE = 'Symfony\Component\Security\Core\Util\SecureRandomInterface';
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/**
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* @var \PHPUnit_Framework_MockObject_MockObject
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*/
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private $secureRandom;
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protected function setUp()
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{
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$this->secureRandom = $this->getMock(self::SECURE_RANDOM_INTERFACE);
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$this->secureRandom
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->expects($this->any())
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->method('nextBytes')
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->will($this->returnValue(self::BYTES))
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;
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}
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/**
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* @expectedException \InvalidArgumentException
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*/
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public function testCostBelowRange()
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{
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new BCryptPasswordEncoder($this->secureRandom, 3);
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new BCryptPasswordEncoder(3);
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}
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/**
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@ -53,60 +35,28 @@ class BCryptPasswordEncoderTest extends \PHPUnit_Framework_TestCase
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*/
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public function testCostAboveRange()
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{
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new BCryptPasswordEncoder($this->secureRandom, 32);
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new BCryptPasswordEncoder(32);
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}
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public function testCostInRange()
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{
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for ($cost = 4; $cost <= 31; $cost++) {
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new BCryptPasswordEncoder($this->secureRandom, $cost);
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new BCryptPasswordEncoder($cost);
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}
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}
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public function testResultLength()
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{
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$encoder = new BCryptPasswordEncoder($this->secureRandom, self::VALID_COST);
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$encoder = new BCryptPasswordEncoder(self::VALID_COST);
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$result = $encoder->encodePassword(self::PASSWORD, null);
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$this->assertEquals(60, strlen($result));
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}
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public function testValidation()
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{
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$encoder = new BCryptPasswordEncoder($this->secureRandom, self::VALID_COST);
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$encoder = new BCryptPasswordEncoder(self::VALID_COST);
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$result = $encoder->encodePassword(self::PASSWORD, null);
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$this->assertTrue($encoder->isPasswordValid($result, self::PASSWORD, null));
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$this->assertFalse($encoder->isPasswordValid($result, 'anotherPassword', null));
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}
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public function testValidationKnownPassword()
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{
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$encoder = new BCryptPasswordEncoder($this->secureRandom, self::VALID_COST);
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$prefix = '$'.(version_compare(phpversion(), '5.3.7', '>=')
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? '2y' : '2a').'$';
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$encrypted = $prefix.'04$ABCDEFGHIJKLMNOPQRSTU.uTmwd4KMSHxbUsG7bng8x7YdA0PM1iq';
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$this->assertTrue($encoder->isPasswordValid($encrypted, self::PASSWORD, null));
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}
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public function testSecureRandomIsUsed()
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{
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if (function_exists('mcrypt_create_iv')) {
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return;
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}
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$this->secureRandom
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->expects($this->atLeastOnce())
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->method('nextBytes')
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;
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$encoder = new BCryptPasswordEncoder($this->secureRandom, self::VALID_COST);
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$result = $encoder->encodePassword(self::PASSWORD, null);
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$prefix = '$'.(version_compare(phpversion(), '5.3.7', '>=')
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? '2y' : '2a').'$';
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$salt = 'MDEyMzQ1Njc4OWFiY2RlZe';
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$expected = crypt(self::PASSWORD, $prefix.self::VALID_COST.'$'.$salt);
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$this->assertEquals($expected, $result);
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}
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}
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@ -19,7 +19,8 @@
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"php": ">=5.3.3",
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"symfony/event-dispatcher": "~2.1",
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"symfony/http-foundation": ">=2.1,<2.4-dev",
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"symfony/http-kernel": ">=2.1,<=2.3-dev"
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"symfony/http-kernel": ">=2.1,<=2.3-dev",
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"ircmaxell/password-compat": "1.0.*"
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},
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"require-dev": {
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"symfony/form": "~2.0",
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