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<?php |
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2016 Spomky-Labs |
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* |
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* This software may be modified and distributed under the terms |
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* of the MIT license. See the LICENSE file for details. |
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*/ |
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namespace Jose; |
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use Jose\Util\JWELoader; |
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use Jose\Util\JWSLoader; |
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/** |
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* Class able to load JWS or JWE. |
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* JWS object can also be verified. |
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*/ |
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final class Loader implements LoaderInterface |
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{ |
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/** |
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* Loader constructor. |
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*/ |
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private function __construct() |
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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 static function load($input) |
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{ |
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$json = self::convert($input); |
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if (array_key_exists('signatures', $json)) { |
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return JWSLoader::loadSerializedJsonJWS($json); |
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} |
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if (array_key_exists('recipients', $json)) { |
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return JWELoader::loadSerializedJsonJWE($json); |
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} |
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throw new \InvalidArgumentException('Unable to load the input'); |
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} |
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/** |
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* @param string $input |
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* |
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* @return array |
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*/ |
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private static function convert($input) |
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{ |
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if (is_array($data = json_decode($input, true))) { |
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if (array_key_exists('signatures', $data) || array_key_exists('recipients', $data)) { |
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return $data; |
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} elseif (array_key_exists('signature', $data)) { |
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return self::fromFlattenedSerializationSignatureToSerialization($data); |
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} elseif (array_key_exists('ciphertext', $data)) { |
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return self::fromFlattenedSerializationRecipientToSerialization($data); |
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} |
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} elseif (is_string($input)) { |
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return self::fromCompactSerializationToSerialization($input); |
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} |
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throw new \InvalidArgumentException('Unsupported input'); |
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} |
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/** |
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* @param $input |
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* |
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* @return array |
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*/ |
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private static function fromFlattenedSerializationRecipientToSerialization($input) |
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{ |
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$recipient = []; |
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foreach (['header', 'encrypted_key'] as $key) { |
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if (array_key_exists($key, $input)) { |
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$recipient[$key] = $input[$key]; |
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} |
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} |
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$recipients = [ |
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'ciphertext' => $input['ciphertext'], |
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'recipients' => [$recipient], |
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]; |
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foreach (['ciphertext', 'protected', 'unprotected', 'iv', 'aad', 'tag'] as $key) { |
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if (array_key_exists($key, $input)) { |
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$recipients[$key] = $input[$key]; |
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} |
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} |
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return $recipients; |
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} |
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/** |
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* @param $input |
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* |
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* @return array |
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*/ |
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private static function fromFlattenedSerializationSignatureToSerialization($input) |
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{ |
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$signature = [ |
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'signature' => $input['signature'], |
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]; |
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foreach (['protected', 'header'] as $key) { |
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if (array_key_exists($key, $input)) { |
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$signature[$key] = $input[$key]; |
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} |
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} |
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$temp = []; |
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if (!empty($input['payload'])) { |
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$temp['payload'] = $input['payload']; |
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} |
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$temp['signatures'] = [$signature]; |
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return $temp; |
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} |
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/** |
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* @param string $input |
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* |
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* @return array |
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*/ |
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private static function fromCompactSerializationToSerialization($input) |
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{ |
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$parts = explode('.', $input); |
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switch (count($parts)) { |
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case 3: |
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return self::fromCompactSerializationSignatureToSerialization($parts); |
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case 5: |
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return self::fromCompactSerializationRecipientToSerialization($parts); |
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default: |
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throw new \InvalidArgumentException('Unsupported input'); |
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} |
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} |
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/** |
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* @param array $parts |
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* |
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* @return array |
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*/ |
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private static function fromCompactSerializationRecipientToSerialization(array $parts) |
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{ |
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$recipient = []; |
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if (!empty($parts[1])) { |
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$recipient['encrypted_key'] = $parts[1]; |
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} |
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$recipients = [ |
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'recipients' => [$recipient], |
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]; |
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foreach ([3 => 'ciphertext', 0 => 'protected', 2 => 'iv', 4 => 'tag'] as $part => $key) { |
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if (!empty($parts[$part])) { |
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$recipients[$key] = $parts[$part]; |
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} |
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} |
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return $recipients; |
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} |
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/** |
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* @param array $parts |
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* |
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* @return array |
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*/ |
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private static function fromCompactSerializationSignatureToSerialization(array $parts) |
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{ |
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$temp = []; |
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if (!empty($parts[1])) { |
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$temp['payload'] = $parts[1]; |
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} |
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$temp['signatures'] = [[ |
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'protected' => $parts[0], |
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'signature' => $parts[2], |
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]]; |
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return $temp; |
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} |
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} |
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Spomky-Labs /
jose
