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Edit File : AbstractCryptoClient.php \| Size : 3.76 KB
<?php namespace Aws\Crypto; use Aws\Crypto\Cipher\CipherMethod; use Aws\Crypto\Cipher\Cbc; use GuzzleHttp\Psr7\Stream; /** * @internal / abstract class AbstractCryptoClient { public static $supportedCiphers = ['cbc', 'gcm']; /* * Returns if the passed cipher name is supported for encryption by the SDK. * * @param string $cipherName The name of a cipher to verify is registered. * * @return bool If the cipher passed is in our supported list. / public static function isSupportedCipher($cipherName) { return in_array($cipherName, self::$supportedCiphers); } /* * Returns an identifier recognizable by `openssl_` functions, such as `aes-256-cbc` or `aes-128-ctr`. * * @param string $cipherName Name of the cipher being used for encrypting * or decrypting. * @param int $keySize Size of the encryption key, in bits, that will be * used. * * @return string / abstract protected function getCipherOpenSslName($cipherName, $keySize); /* * Constructs a CipherMethod for the given name, initialized with the other * data passed for use in encrypting or decrypting. * * @param string $cipherName Name of the cipher to generate for encrypting. * @param string $iv Base Initialization Vector for the cipher. * @param int $keySize Size of the encryption key, in bits, that will be * used. * * @return CipherMethod * * @internal / abstract protected function buildCipherMethod($cipherName, $iv, $keySize); /* * Performs a reverse lookup to get the openssl_* cipher name from the * AESName passed in from the MetadataEnvelope. * * @param $aesName * * @return string * * @internal / abstract protected function getCipherFromAesName($aesName); /* * Dependency to provide an interface for building an encryption stream for * data given cipher details, metadata, and materials to do so. * * @param Stream $plaintext Plain-text data to be encrypted using the * materials, algorithm, and data provided. * @param array $cipherOptions Options for use in determining the cipher to * be used for encrypting data. * @param MaterialsProvider $provider A provider to supply and encrypt * materials used in encryption. * @param MetadataEnvelope $envelope A storage envelope for encryption * metadata to be added to. * * @return AesStreamInterface * * @internal / abstract public function encrypt( Stream $plaintext, array $cipherOptions, MaterialsProvider $provider, MetadataEnvelope $envelope ); /* * Dependency to provide an interface for building a decryption stream for * cipher text given metadata and materials to do so. * * @param string $cipherText Plain-text data to be decrypted using the * materials, algorithm, and data provided. * @param MaterialsProvider $provider A provider to supply and encrypt * materials used in encryption. * @param MetadataEnvelope $envelope A storage envelope for encryption * metadata to be read from. * @param array $cipherOptions Additional verification options. * * @return AesStreamInterface * * @internal */ abstract public function decrypt( $cipherText, MaterialsProvider $provider, MetadataEnvelope $envelope, array $cipherOptions = [] ); } Back

Edit File : AbstractCryptoClient.php | Size : 3.76 KB

<?php
namespace Aws\Crypto;

use Aws\Crypto\Cipher\CipherMethod;
use Aws\Crypto\Cipher\Cbc;
use GuzzleHttp\Psr7\Stream;

/**
 * @internal
 */
abstract class AbstractCryptoClient
{
    public static $supportedCiphers = ['cbc', 'gcm'];

/**
     * Returns if the passed cipher name is supported for encryption by the SDK.
     *
     * @param string $cipherName The name of a cipher to verify is registered.
     *
     * @return bool If the cipher passed is in our supported list.
     */
    public static function isSupportedCipher($cipherName)
    {
        return in_array($cipherName, self::$supportedCiphers);
    }

/**
     * Returns an identifier recognizable by `openssl_*` functions, such as
     * `aes-256-cbc` or `aes-128-ctr`.
     *
     * @param string $cipherName Name of the cipher being used for encrypting
     *                           or decrypting.
     * @param int $keySize Size of the encryption key, in bits, that will be
     *                     used.
     *
     * @return string
     */
    abstract protected function getCipherOpenSslName($cipherName, $keySize);

/**
     * Constructs a CipherMethod for the given name, initialized with the other
     * data passed for use in encrypting or decrypting.
     *
     * @param string $cipherName Name of the cipher to generate for encrypting.
     * @param string $iv Base Initialization Vector for the cipher.
     * @param int $keySize Size of the encryption key, in bits, that will be
     *                     used.
     *
     * @return CipherMethod
     *
     * @internal
     */
    abstract protected function buildCipherMethod($cipherName, $iv, $keySize);

/**
     * Performs a reverse lookup to get the openssl_* cipher name from the
     * AESName passed in from the MetadataEnvelope.
     *
     * @param $aesName
     *
     * @return string
     *
     * @internal
     */
    abstract protected function getCipherFromAesName($aesName);

/**
     * Dependency to provide an interface for building an encryption stream for
     * data given cipher details, metadata, and materials to do so.
     *
     * @param Stream $plaintext Plain-text data to be encrypted using the
     *                          materials, algorithm, and data provided.
     * @param array $cipherOptions Options for use in determining the cipher to
     *                             be used for encrypting data.
     * @param MaterialsProvider $provider A provider to supply and encrypt
     *                                    materials used in encryption.
     * @param MetadataEnvelope $envelope A storage envelope for encryption
     *                                   metadata to be added to.
     *
     * @return AesStreamInterface
     *
     * @internal
     */
    abstract public function encrypt(
        Stream $plaintext,
        array $cipherOptions,
        MaterialsProvider $provider,
        MetadataEnvelope $envelope
    );

/**
     * Dependency to provide an interface for building a decryption stream for
     * cipher text given metadata and materials to do so.
     *
     * @param string $cipherText Plain-text data to be decrypted using the
     *                           materials, algorithm, and data provided.
     * @param MaterialsProvider $provider A provider to supply and encrypt
     *                                    materials used in encryption.
     * @param MetadataEnvelope $envelope A storage envelope for encryption
     *                                   metadata to be read from.
     * @param array $cipherOptions Additional verification options.
     *
     * @return AesStreamInterface
     *
     * @internal
     */
    abstract public function decrypt(
        $cipherText,
        MaterialsProvider $provider,
        MetadataEnvelope $envelope,
        array $cipherOptions = []
    );
}

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