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<?php namespace Aws\Crypto; interface MaterialsProviderInterface { /** * Returns if the requested size is supported by AES. * * @param int $keySize Size of the requested key in bits. * * @return bool */ public static function isSupportedKeySize($keySize); /** * Performs further initialization of the MaterialsProvider based on the * data inside the MetadataEnvelope. * * @param MetadataEnvelope $envelope A storage envelope for encryption * metadata to be read from. * * @internal */ public function fromDecryptionEnvelope(MetadataEnvelope $envelope); /** * Returns the wrap algorithm name for this Provider. * * @return string */ public function getWrapAlgorithmName(); /** * Takes an encrypted content encryption key (CEK) and material description * for use decrypting the key according to the Provider's specifications. * * @param string $encryptedCek Encrypted key to be decrypted by the Provider * for use decrypting other data. * @param string $materialDescription Material Description for use in * encrypting the $cek. * * @return string */ public function decryptCek($encryptedCek, $materialDescription); /** * @param string $keySize Length of a cipher key in bits for generating a * random content encryption key (CEK). * * @return string */ public function generateCek($keySize); /** * @param string $openSslName Cipher OpenSSL name to use for generating * an initialization vector. * * @return string */ public function generateIv($openSslName); }
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