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<?php |
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/** |
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* Cryptography key holder. |
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* |
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* @author Julián Gutiérrez <[email protected]> |
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* @copyright Copyright (c) Alex Bilbie |
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* @license http://mit-license.org/ |
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* |
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* @link https://github.com/thephpleague/oauth2-server |
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*/ |
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declare(strict_types=1); |
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namespace League\OAuth2\Server; |
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use LogicException; |
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use OpenSSLAsymmetricKey; |
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use function decoct; |
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use function file_get_contents; |
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use function fileperms; |
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use function in_array; |
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use function is_file; |
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use function is_readable; |
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use function openssl_pkey_get_details; |
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use function openssl_pkey_get_private; |
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use function openssl_pkey_get_public; |
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use function sprintf; |
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use function strpos; |
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use function trigger_error; |
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class CryptKey implements CryptKeyInterface |
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{ |
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private const FILE_PREFIX = 'file://'; |
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/** |
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* @var string Key contents |
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*/ |
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protected string $keyContents; |
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protected string $keyPath; |
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public function __construct(string $keyPath, protected ?string $passPhrase = null, bool $keyPermissionsCheck = true) |
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{ |
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if (strpos($keyPath, self::FILE_PREFIX) !== 0 && $this->isValidKey($keyPath, $this->passPhrase ?? '')) { |
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$this->keyContents = $keyPath; |
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$this->keyPath = ''; |
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// There's no file, so no need for permission check. |
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$keyPermissionsCheck = false; |
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} elseif (is_file($keyPath)) { |
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if (strpos($keyPath, self::FILE_PREFIX) !== 0) { |
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$keyPath = self::FILE_PREFIX . $keyPath; |
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} |
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if (!is_readable($keyPath)) { |
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throw new LogicException(sprintf('Key path "%s" does not exist or is not readable', $keyPath)); |
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} |
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$keyContents = file_get_contents($keyPath); |
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if ($keyContents === false) { |
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throw new LogicException('Unable to read key from file ' . $keyPath); |
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} |
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$this->keyContents = $keyContents; |
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$this->keyPath = $keyPath; |
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if (!$this->isValidKey($this->keyContents, $this->passPhrase ?? '')) { |
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throw new LogicException('Unable to read key from file ' . $keyPath); |
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} |
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} else { |
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throw new LogicException('Invalid key supplied'); |
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} |
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if ($keyPermissionsCheck === true) { |
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// Verify the permissions of the key |
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$keyPathPerms = decoct(fileperms($this->keyPath) & 0777); |
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if (in_array($keyPathPerms, ['400', '440', '600', '640', '660'], true) === false) { |
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trigger_error( |
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sprintf( |
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'Key file "%s" permissions are not correct, recommend changing to 600 or 660 instead of %s', |
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$this->keyPath, |
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$keyPathPerms |
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), |
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E_USER_NOTICE |
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); |
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} |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getKeyContents(): string |
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{ |
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return $this->keyContents; |
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} |
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/** |
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* Validate key contents. |
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*/ |
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private function isValidKey(string $contents, string $passPhrase): bool |
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{ |
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$privateKey = openssl_pkey_get_private($contents, $passPhrase); |
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$key = $privateKey instanceof OpenSSLAsymmetricKey ? $privateKey : openssl_pkey_get_public($contents); |
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if ($key === false) { |
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return false; |
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} |
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$details = openssl_pkey_get_details($key); |
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return $details !== false && in_array( |
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$details['type'] ?? -1, |
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[OPENSSL_KEYTYPE_RSA, OPENSSL_KEYTYPE_EC], |
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true |
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); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getKeyPath(): string |
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{ |
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return $this->keyPath; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getPassPhrase(): ?string |
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{ |
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return $this->passPhrase; |
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} |
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} |
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thephpleague /
oauth2-server
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