Merge pull request #20923 from nextcloud/backport/20915/stable19
[stable19] Use random_bytes
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commit
c37bb7745b
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@ -52,17 +52,14 @@ class Crypto implements ICrypto {
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private $ivLength = 16;
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/** @var IConfig */
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private $config;
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/** @var ISecureRandom */
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private $random;
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/**
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* @param IConfig $config
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* @param ISecureRandom $random
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*/
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public function __construct(IConfig $config, ISecureRandom $random) {
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public function __construct(IConfig $config) {
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$this->cipher = new AES();
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$this->config = $config;
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$this->random = $random;
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}
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/**
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@ -95,13 +92,14 @@ class Crypto implements ICrypto {
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}
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$this->cipher->setPassword($password);
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$iv = $this->random->generate($this->ivLength);
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$iv = \random_bytes($this->ivLength);
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$this->cipher->setIV($iv);
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$ciphertext = bin2hex($this->cipher->encrypt($plaintext));
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$iv = bin2hex($iv);
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$hmac = bin2hex($this->calculateHMAC($ciphertext.$iv, $password));
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return $ciphertext.'|'.$iv.'|'.$hmac;
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return $ciphertext.'|'.$iv.'|'.$hmac.'|2';
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}
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/**
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@ -119,7 +117,8 @@ class Crypto implements ICrypto {
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$this->cipher->setPassword($password);
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$parts = explode('|', $authenticatedCiphertext);
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if (\count($parts) !== 3) {
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$partCount = \count($parts);
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if ($partCount < 3 || $partCount > 4) {
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throw new \Exception('Authenticated ciphertext could not be decoded.');
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}
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@ -127,6 +126,13 @@ class Crypto implements ICrypto {
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$iv = $parts[1];
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$hmac = hex2bin($parts[2]);
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if ($partCount === 4) {
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$version = $parts[3];
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if ($version === '2') {
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$iv = hex2bin($iv);
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}
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}
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$this->cipher->setIV($iv);
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if (!hash_equals($this->calculateHMAC($parts[0] . $parts[1], $password), $hmac)) {
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@ -24,7 +24,7 @@ class CryptoTest extends \Test\TestCase {
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protected function setUp(): void {
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parent::setUp();
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$this->crypto = new Crypto(\OC::$server->getConfig(), \OC::$server->getSecureRandom());
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$this->crypto = new Crypto(\OC::$server->getConfig());
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}
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/**
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@ -68,4 +68,11 @@ class CryptoTest extends \Test\TestCase {
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$encryptedString = '1|2';
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$this->crypto->decrypt($encryptedString, 'ThisIsAVeryS3cur3P4ssw0rd');
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}
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public function testLegacy() {
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$cipherText = 'e16599188e3d212f5c7f17fdc2abca46|M1WfLAxbcAmITeD6|509457885d6ca5e6c3bfd3741852687a7f2bffce197f8d5ae97b65818b15a1b7f616b68326ff312371540f4ca8ac55f8e2de4aa13aab3474bd3431e51214e3ee';
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$password = 'mypass';
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$this->assertSame('legacy test', $this->crypto->decrypt($cipherText, $password));
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}
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}
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