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<?php |
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/** |
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* Public/private key encryption. |
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* |
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* @author Alex Bilbie <[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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namespace League\OAuth2\Server; |
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trait CryptTrait |
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{ |
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/** |
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* @var \League\OAuth2\Server\CryptKey |
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*/ |
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protected $privateKey; |
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/** |
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* @var \League\OAuth2\Server\CryptKey |
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*/ |
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protected $publicKey; |
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/** |
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* Set path to private key. |
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* |
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* @param \League\OAuth2\Server\CryptKey $privateKey |
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*/ |
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public function setPrivateKey(CryptKey $privateKey) |
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{ |
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$this->privateKey = $privateKey; |
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} |
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/** |
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* Set path to public key. |
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* |
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* @param \League\OAuth2\Server\CryptKey $publicKey |
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*/ |
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public function setPublicKey(CryptKey $publicKey) |
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{ |
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$this->publicKey = $publicKey; |
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} |
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/** |
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* Encrypt data with a private key. |
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* |
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* @param string $unencryptedData |
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* |
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* @return string |
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*/ |
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protected function encrypt($unencryptedData) |
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{ |
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$privateKey = openssl_pkey_get_private($this->privateKey->getKeyPath(), $this->privateKey->getPassPhrase()); |
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$privateKeyDetails = @openssl_pkey_get_details($privateKey); |
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if ($privateKeyDetails === null) { |
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throw new \LogicException( |
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sprintf('Could not get details of private key: %s', $this->privateKey->getKeyPath()) |
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); |
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} |
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$chunkSize = ceil($privateKeyDetails['bits'] / 8) - 11; |
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$output = ''; |
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while ($unencryptedData) { |
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$chunk = substr($unencryptedData, 0, $chunkSize); |
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$unencryptedData = substr($unencryptedData, $chunkSize); |
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if (openssl_private_encrypt($chunk, $encrypted, $privateKey) === false) { |
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// @codeCoverageIgnoreStart |
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throw new \LogicException('Failed to encrypt data'); |
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// @codeCoverageIgnoreEnd |
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} |
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$output .= $encrypted; |
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} |
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openssl_pkey_free($privateKey); |
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return base64_encode($output); |
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} |
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/** |
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* Decrypt data with a public key. |
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* |
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* @param string $encryptedData |
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* |
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* @throws \LogicException |
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* |
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* @return string |
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*/ |
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protected function decrypt($encryptedData) |
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{ |
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$publicKey = openssl_pkey_get_public($this->publicKey->getKeyPath()); |
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$publicKeyDetails = @openssl_pkey_get_details($publicKey); |
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if ($publicKeyDetails === null) { |
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throw new \LogicException( |
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sprintf('Could not get details of public key: %s', $this->publicKey->getKeyPath()) |
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); |
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} |
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$chunkSize = ceil($publicKeyDetails['bits'] / 8); |
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$output = ''; |
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$encryptedData = base64_decode($encryptedData); |
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while ($encryptedData) { |
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$chunk = substr($encryptedData, 0, $chunkSize); |
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$encryptedData = substr($encryptedData, $chunkSize); |
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if (openssl_public_decrypt($chunk, $decrypted, $publicKey/*, OPENSSL_PKCS1_OAEP_PADDING*/) === false) { |
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// @codeCoverageIgnoreStart |
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throw new \LogicException('Failed to decrypt data'); |
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// @codeCoverageIgnoreEnd |
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} |
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$output .= $decrypted; |
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} |
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openssl_pkey_free($publicKey); |
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return $output; |
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} |
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} |
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thephpleague /
oauth2-server
