v2: Updates

* Simplifies & beautifies everything
* Introduces a new Class system.
* Errors are defaulted to AWS's handler.
* New function names & more efficient handling.
* Should fix a majority of the errors.

Please read the README for more!

aws/Aws/Crypto/MaterialsProviderInterface.php

@@ -0,0 +1,61 @@
+<?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);
+}