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Original file line number | Diff line number | Diff line change |
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<?php | ||
/** | ||
* wallee SDK | ||
* | ||
* This library allows to interact with the wallee payment service. | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
|
||
|
||
namespace Wallee\Sdk; | ||
|
||
use \Exception; | ||
|
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/** | ||
* EncryptionUtil Class Doc Comment | ||
* | ||
* @category Class | ||
* @package Wallee\Sdk | ||
* @author wallee AG | ||
* @license http://www.apache.org/licenses/LICENSE-2.0 Apache License v2 | ||
*/ | ||
class EncryptionUtil | ||
{ | ||
/** | ||
* Verify content with signature | ||
* | ||
* @param string $contentToVerify Content to verify (required) | ||
* @param string $contentSignature Content signature (required) | ||
* @param string $encodedPublicKey Base64 encoded public key (required) | ||
* @param string $signatureAlgorithm Signature algorithm (required) | ||
* @throws RuntimeException | ||
* @return bool | ||
*/ | ||
public static function isContentValid($contentToVerify, $contentSignature, $encodedPublicKey, $signatureAlgorithm) { | ||
switch ($signatureAlgorithm) { | ||
case "SHA256withECDSA": | ||
$publicKey = self::getPublicKey($encodedPublicKey); | ||
$openSSLAlgorithm = OPENSSL_ALGO_SHA256; | ||
break; | ||
default: | ||
throw new Exception("Unknown webhook signature encryption algorithm: " . $signatureAlgorithm); | ||
} | ||
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$verification = openssl_verify($contentToVerify, base64_decode($contentSignature), $publicKey, $openSSLAlgorithm); | ||
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if (PHP_VERSION_ID < 80000) { | ||
openssl_free_key($publicKey); | ||
} | ||
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return $verification == 1; | ||
} | ||
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private static function getPublicKey($encodedPublicKey) { | ||
$pem = "-----BEGIN PUBLIC KEY-----\n" . chunk_split($encodedPublicKey, 64, "\n") . "-----END PUBLIC KEY-----"; | ||
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// Create the public key resource | ||
$publicKey = openssl_pkey_get_public($pem); | ||
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if (!$publicKey) { | ||
throw new Exception("Failed to create public key from base64 string"); | ||
} | ||
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return $publicKey; | ||
} | ||
|
||
} |
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