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installed plugin Infinite Uploads version 2.0.8

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KawaiiPunk
2025-05-02 12:03:21 +00:00
committed by Gitium
parent 7ca941b591
commit 8fefb19ab4
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109
wp-content/plugins/infinite-uploads/vendor/Aws3/Aws/Crypto/DecryptionTrait.php vendored Normal file
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<?php
namespace UglyRobot\Infinite_Uploads\Aws\Crypto;
use UglyRobot\Infinite_Uploads\GuzzleHttp\Psr7;
use UglyRobot\Infinite_Uploads\GuzzleHttp\Psr7\LimitStream;
use UglyRobot\Infinite_Uploads\Psr\Http\Message\StreamInterface;
trait DecryptionTrait
{
/**
* Dependency to reverse lookup the openssl_* cipher name from the AESName
* in the MetadataEnvelope.
*
* @param $aesName
*
* @return string
*
* @internal
*/
protected abstract function getCipherFromAesName($aesName);
/**
* Dependency to generate a CipherMethod from a set of inputs for loading
* in to an AesDecryptingStream.
*
* @param string $cipherName Name of the cipher to generate for decrypting.
* @param string $iv Base Initialization Vector for the cipher.
* @param int $keySize Size of the encryption key, in bits, that will be
* used.
*
* @return Cipher\CipherMethod
*
* @internal
*/
protected abstract function buildCipherMethod($cipherName, $iv, $keySize);
/**
* Builds an AesStreamInterface using cipher options loaded from the
* MetadataEnvelope and MaterialsProvider. Can decrypt data from both the
* legacy and V2 encryption client workflows.
*
* @param string $cipherText Plain-text data to be encrypted using the
* materials, algorithm, and data provided.
* @param MaterialsProviderInterface $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
*
* @throws \InvalidArgumentException Thrown when a value in $cipherOptions
* is not valid.
*
* @internal
*/
public function decrypt($cipherText, \UglyRobot\Infinite_Uploads\Aws\Crypto\MaterialsProviderInterface $provider, \UglyRobot\Infinite_Uploads\Aws\Crypto\MetadataEnvelope $envelope, array $cipherOptions = [])
{
$cipherOptions['Iv'] = base64_decode($envelope[\UglyRobot\Infinite_Uploads\Aws\Crypto\MetadataEnvelope::IV_HEADER]);
$cipherOptions['TagLength'] = $envelope[\UglyRobot\Infinite_Uploads\Aws\Crypto\MetadataEnvelope::CRYPTO_TAG_LENGTH_HEADER] / 8;
$cek = $provider->decryptCek(base64_decode($envelope[\UglyRobot\Infinite_Uploads\Aws\Crypto\MetadataEnvelope::CONTENT_KEY_V2_HEADER]), json_decode($envelope[\UglyRobot\Infinite_Uploads\Aws\Crypto\MetadataEnvelope::MATERIALS_DESCRIPTION_HEADER], true));
$cipherOptions['KeySize'] = strlen($cek) * 8;
$cipherOptions['Cipher'] = $this->getCipherFromAesName($envelope[\UglyRobot\Infinite_Uploads\Aws\Crypto\MetadataEnvelope::CONTENT_CRYPTO_SCHEME_HEADER]);
$decryptionStream = $this->getDecryptingStream($cipherText, $cek, $cipherOptions);
unset($cek);
return $decryptionStream;
}
private function getTagFromCiphertextStream(\UglyRobot\Infinite_Uploads\Psr\Http\Message\StreamInterface $cipherText, $tagLength)
{
$cipherTextSize = $cipherText->getSize();
if ($cipherTextSize == null || $cipherTextSize <= 0) {
throw new \RuntimeException('Cannot decrypt a stream of unknown' . ' size.');
}
return (string) new \UglyRobot\Infinite_Uploads\GuzzleHttp\Psr7\LimitStream($cipherText, $tagLength, $cipherTextSize - $tagLength);
}
private function getStrippedCiphertextStream(\UglyRobot\Infinite_Uploads\Psr\Http\Message\StreamInterface $cipherText, $tagLength)
{
$cipherTextSize = $cipherText->getSize();
if ($cipherTextSize == null || $cipherTextSize <= 0) {
throw new \RuntimeException('Cannot decrypt a stream of unknown' . ' size.');
}
return new \UglyRobot\Infinite_Uploads\GuzzleHttp\Psr7\LimitStream($cipherText, $cipherTextSize - $tagLength, 0);
}
/**
* Generates a stream that wraps the cipher text with the proper cipher and
* uses the content encryption key (CEK) to decrypt the data when read.
*
* @param string $cipherText Plain-text data to be encrypted using the
* materials, algorithm, and data provided.
* @param string $cek A content encryption key for use by the stream for
* encrypting the plaintext data.
* @param array $cipherOptions Options for use in determining the cipher to
* be used for encrypting data.
*
* @return AesStreamInterface
*
* @internal
*/
protected function getDecryptingStream($cipherText, $cek, $cipherOptions)
{
$cipherTextStream = \UglyRobot\Infinite_Uploads\GuzzleHttp\Psr7\stream_for($cipherText);
switch ($cipherOptions['Cipher']) {
case 'gcm':
$cipherOptions['Tag'] = $this->getTagFromCiphertextStream($cipherTextStream, $cipherOptions['TagLength']);
return new \UglyRobot\Infinite_Uploads\Aws\Crypto\AesGcmDecryptingStream($this->getStrippedCiphertextStream($cipherTextStream, $cipherOptions['TagLength']), $cek, $cipherOptions['Iv'], $cipherOptions['Tag'], $cipherOptions['Aad'] = isset($cipherOptions['Aad']) ? $cipherOptions['Aad'] : null, $cipherOptions['TagLength'] ?: null, $cipherOptions['KeySize']);
default:
$cipherMethod = $this->buildCipherMethod($cipherOptions['Cipher'], $cipherOptions['Iv'], $cipherOptions['KeySize']);
return new \UglyRobot\Infinite_Uploads\Aws\Crypto\AesDecryptingStream($cipherTextStream, $cek, $cipherMethod);
}
}
}