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<?php |
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namespace MadWizard\WebAuthn\Crypto; |
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use MadWizard\WebAuthn\Exception\UnsupportedException; |
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use MadWizard\WebAuthn\Exception\WebAuthnException; |
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class OpenSslVerifier |
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{ |
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private const OPENSSL_ALGO_MAP = [ |
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CoseAlgorithm::ES256 => OPENSSL_ALGO_SHA256, |
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CoseAlgorithm::ES384 => OPENSSL_ALGO_SHA384, |
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CoseAlgorithm::ES512 => OPENSSL_ALGO_SHA512, |
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CoseAlgorithm::RS256 => OPENSSL_ALGO_SHA256, |
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CoseAlgorithm::RS384 => OPENSSL_ALGO_SHA384, |
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CoseAlgorithm::RS512 => OPENSSL_ALGO_SHA512, |
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CoseAlgorithm::RS1 => OPENSSL_ALGO_SHA1, |
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]; |
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/** |
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* @var int |
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*/ |
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private $openSslAlgorithm; |
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public function __construct(int $coseAlgorithm) |
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{ |
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$this->openSslAlgorithm = $this->getOpenSslAlgorithm($coseAlgorithm); |
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} |
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private function getOpenSslAlgorithm(int $algorithm): int |
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{ |
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$openSslAlgorithm = self::OPENSSL_ALGO_MAP[$algorithm] ?? null; |
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if ($openSslAlgorithm === null) { |
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throw new UnsupportedException('Unsupported algorithm'); |
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} |
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return $openSslAlgorithm; |
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} |
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public function verify(string $data, string $signature, string $keyPem): bool |
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{ |
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$publicKey = openssl_pkey_get_public($keyPem); |
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if ($publicKey === false) { |
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throw new WebAuthnException('Public key invalid'); |
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} |
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try { |
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$verify = openssl_verify($data, $signature, $publicKey, $this->openSslAlgorithm); |
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if ($verify === 1) { |
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return true; |
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} |
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if ($verify === 0) { |
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return false; |
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} |
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throw new WebAuthnException('Failed to check signature'); |
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} finally { |
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if (PHP_VERSION_ID < 80000) { |
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openssl_free_key($publicKey); |
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} |
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} |
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} |
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} |
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madwizard-org /
webauthn-server
