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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);
}