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[Security/Core] make NativePasswordEncoder use sodium to validate passwords when possible #34140

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Merged
merged 1 commit into from
Oct 28, 2019
Merged

[Security/Core] make NativePasswordEncoder use sodium to validate passwords when possible #34140

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31 changes: 18 additions & 13 deletions src/Symfony/Component/Security/Core/Encoder/NativePasswordEncoder.php
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Original file line number Diff line number Diff line change
Expand Up @@ -45,7 +45,7 @@ public function __construct(int $opsLimit = null, int $memLimit = null, int $cos
throw new \InvalidArgumentException('$cost must be in the range of 4-31.');
}

$this->algo = \defined('PASSWORD_ARGON2I') ? max(PASSWORD_DEFAULT, \defined('PASSWORD_ARGON2ID') ? PASSWORD_ARGON2ID : PASSWORD_ARGON2I) : PASSWORD_DEFAULT;
$this->algo = \defined('PASSWORD_ARGON2ID') ? PASSWORD_ARGON2ID : (\defined('PASSWORD_ARGON2I') ? PASSWORD_ARGON2I : PASSWORD_BCRYPT);
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your plan initially was to always be at least as good as PASSWORD_DEFAULT, even if PHP upgrades it. Is this plan gone ?

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yes, the plan is gone: in 7.4, PASSWORD_DEFAULT === null and other PASSWORD_* consts are strings; this makes it too difficult to maintain the plan.

$this->options = [
'cost' => $cost,
'time_cost' => $opsLimit,
Expand All @@ -59,32 +59,37 @@ public function __construct(int $opsLimit = null, int $memLimit = null, int $cos
*/
public function encodePassword($raw, $salt)
{
if (\strlen($raw) > self::MAX_PASSWORD_LENGTH) {
if (\strlen($raw) > self::MAX_PASSWORD_LENGTH || (PASSWORD_BCRYPT === $this->algo && 72 < \strlen($raw))) {
throw new BadCredentialsException('Invalid password.');
}

// Ignore $salt, the auto-generated one is always the best

$encoded = password_hash($raw, $this->algo, $this->options);

if (72 < \strlen($raw) && 0 === strpos($encoded, '$2')) {
// BCrypt encodes only the first 72 chars
throw new BadCredentialsException('Invalid password.');
}

return $encoded;
return password_hash($raw, $this->algo, $this->options);
}

/**
* {@inheritdoc}
*/
public function isPasswordValid($encoded, $raw, $salt)
{
if (72 < \strlen($raw) && 0 === strpos($encoded, '$2')) {
// BCrypt encodes only the first 72 chars
if (\strlen($raw) > self::MAX_PASSWORD_LENGTH) {
return false;
}

return \strlen($raw) <= self::MAX_PASSWORD_LENGTH && password_verify($raw, $encoded);
if (0 === strpos($encoded, '$2')) {
// BCrypt encodes only the first 72 chars
return 72 >= \strlen($raw) && password_verify($raw, $encoded);
}

if (\extension_loaded('sodium') && version_compare(\SODIUM_LIBRARY_VERSION, '1.0.14', '>=')) {
return sodium_crypto_pwhash_str_verify($encoded, $raw);
}

if (\extension_loaded('libsodium') && version_compare(phpversion('libsodium'), '1.0.14', '>=')) {
return \Sodium\crypto_pwhash_str_verify($encoded, $raw);
}

return password_verify($raw, $encoded);
}
}
2 changes: 1 addition & 1 deletion src/Symfony/Component/Security/Core/Encoder/SodiumPasswordEncoder.php
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Original file line number Diff line number Diff line change
Expand Up @@ -93,6 +93,6 @@ public function isPasswordValid($encoded, $raw, $salt)
return \Sodium\crypto_pwhash_str_verify($encoded, $raw);
}

throw new LogicException('Libsodium is not available. You should either install the sodium extension, upgrade to PHP 7.2+ or use a different encoder.');
return false;
}
}