first commit -> move some files from one-api

vendor/aws_v3/Aws/Crypto/MaterialsProviderV2.php

@@ -0,0 +1,66 @@
+<?php
+namespace Aws\Crypto;
+
+abstract class MaterialsProviderV2 implements MaterialsProviderInterfaceV2
+{
+    private static $supportedKeySizes = [
+        128 => true,
+        256 => true,
+    ];
+
+    /**
+     * 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)
+    {
+        return isset(self::$supportedKeySizes[$keySize]);
+    }
+
+    /**
+     * Returns the wrap algorithm name for this Provider.
+     *
+     * @return string
+     */
+    abstract 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
+     *                                    decrypting the CEK.
+     * @param string $options Options for use in decrypting the CEK.
+     *
+     * @return string
+     */
+    abstract public function decryptCek($encryptedCek, $materialDescription, $options);
+
+    /**
+     * @param string $keySize Length of a cipher key in bits for generating a
+     *                        random content encryption key (CEK).
+     * @param array $context Context map needed for key encryption
+     * @param array $options Additional options to be used in CEK generation
+     *
+     * @return array
+     */
+    abstract public function generateCek($keySize, $context, $options);
+
+    /**
+     * @param string $openSslName Cipher OpenSSL name to use for generating
+     *                            an initialization vector.
+     *
+     * @return string
+     */
+    public function generateIv($openSslName)
+    {
+        return openssl_random_pseudo_bytes(
+            openssl_cipher_iv_length($openSslName)
+        );
+    }
+}