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<?php |
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/** |
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* @author Patsura Dmitry https://github.com/ovr <[email protected]> |
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*/ |
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namespace SocialConnect\OpenIDConnect; |
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use SocialConnect\OpenIDConnect\Exception\InvalidJWK; |
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class JWK |
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{ |
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/** |
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* @var string |
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*/ |
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protected $kty; |
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/** |
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* @var string |
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*/ |
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protected $n; |
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/** |
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* @var string |
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*/ |
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protected $e; |
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/** |
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* @param array $parameters |
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* @throws InvalidJWK |
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*/ |
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public function __construct($parameters) |
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{ |
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if (!isset($parameters['kty'])) { |
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throw new InvalidJWK('Unknown kty'); |
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} |
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$this->kty = $parameters['kty']; |
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if (!isset($parameters['n'])) { |
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throw new InvalidJWK('Unknown n'); |
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} |
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$this->n = $parameters['n']; |
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if (!isset($parameters['e'])) { |
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throw new InvalidJWK('Unknown e'); |
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} |
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$this->e = $parameters['e']; |
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} |
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/** |
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* @return string |
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*/ |
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public function getPublicKey() |
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{ |
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$modulus = JWT::urlsafeB64Decode($this->n); |
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$publicExponent = JWT::urlsafeB64Decode($this->e); |
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$components = array( |
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'modulus' => pack('Ca*a*', 2, self::encodeLength(strlen($modulus)), $modulus), |
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'publicExponent' => pack('Ca*a*', 2, self::encodeLength(strlen($publicExponent)), $publicExponent) |
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); |
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$publicKey = pack( |
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'Ca*a*a*', |
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48, |
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self::encodeLength(strlen($components['modulus']) + strlen($components['publicExponent'])), |
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$components['modulus'], |
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$components['publicExponent'] |
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); |
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// sequence(oid(1.2.840.113549.1.1.1), null)) = rsaEncryption. |
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$rsaOID = pack('H*', '300d06092a864886f70d0101010500'); // hex version of MA0GCSqGSIb3DQEBAQUA |
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$publicKey = chr(0) . $publicKey; |
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$publicKey = chr(3) . self::encodeLength(strlen($publicKey)) . $publicKey; |
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$publicKey = pack( |
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'Ca*a*', |
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48, |
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self::encodeLength(strlen($rsaOID . $RSAPublicKey)), |
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$rsaOID . $publicKey |
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); |
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$publicKey = "-----BEGIN PUBLIC KEY-----\r\n" . |
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chunk_split(base64_encode($publicKey), 64) . |
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'-----END PUBLIC KEY-----'; |
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return $publicKey; |
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} |
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/** |
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* DER-encode the length |
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* |
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* DER supports lengths up to (2**8)**127, however, we'll only support lengths up to (2**8)**4. See |
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* {@link http://itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf#p=13 X.690 paragraph 8.1.3} for more information. |
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* |
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* @access private |
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* @param int $length |
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* @return string |
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*/ |
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private static function encodeLength($length) |
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{ |
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if ($length <= 0x7F) { |
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return chr($length); |
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} |
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$temp = ltrim(pack('N', $length), chr(0)); |
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return pack('Ca*', 0x80 | strlen($temp), $temp); |
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} |
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} |
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SocialConnect /
auth
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Short variable names may make your code harder to understand. Variable names should be self-descriptive. This check looks for variable names who are shorter than a configured minimum.