media-cloud-sync / includes / sdk / s3 / Aws / Crypto / MaterialsProviderV2.php

MaterialsProviderV2.php in Media Cloud Sync 1.4.1, at includes/sdk/s3/Aws/Crypto/MaterialsProviderV2.php

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1	<?php
2
3	namespace Dudlewebs\WPMCS\s3\Aws\Crypto;
4
5	abstract class MaterialsProviderV2 implements MaterialsProviderInterfaceV2
6	{
7	private static $supportedKeySizes = [128 => \true, 256 => \true];
8	/**
9	* Returns if the requested size is supported by AES.
10	*
11	* @param int $keySize Size of the requested key in bits.
12	*
13	* @return bool
14	*/
15	public static function isSupportedKeySize($keySize)
16	{
17	return isset(self::$supportedKeySizes[$keySize]);
18	}
19	/**
20	* Returns the wrap algorithm name for this Provider.
21	*
22	* @return string
23	*/
24	public abstract function getWrapAlgorithmName();
25	/**
26	* Takes an encrypted content encryption key (CEK) and material description
27	* for use decrypting the key according to the Provider's specifications.
28	*
29	* @param string $encryptedCek Encrypted key to be decrypted by the Provider
30	* for use decrypting other data.
31	* @param string $materialDescription Material Description for use in
32	* decrypting the CEK.
33	* @param string $options Options for use in decrypting the CEK.
34	*
35	* @return string
36	*/
37	public abstract function decryptCek($encryptedCek, $materialDescription, $options);
38	/**
39	* @param string $keySize Length of a cipher key in bits for generating a
40	* random content encryption key (CEK).
41	* @param array $context Context map needed for key encryption
42	* @param array $options Additional options to be used in CEK generation
43	*
44	* @return array
45	*/
46	public abstract function generateCek($keySize, $context, $options);
47	/**
48	* @param string $openSslName Cipher OpenSSL name to use for generating
49	* an initialization vector.
50	*
51	* @return string
52	*/
53	public function generateIv($openSslName)
54	{
55	return \openssl_random_pseudo_bytes(\openssl_cipher_iv_length($openSslName));
56	}
57	}
58