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fixed a handling bug

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tracer 2022-09-21 16:01:44 +02:00
parent cd5361c65b
commit 3bc232ef0b
1 changed files with 6 additions and 2 deletions
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8
src/Controller/EncryptionController.php
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@ -39,17 +39,21 @@ class EncryptionController
*/
function safeDecrypt(string $encrypted, string $key): string
{
$binKey = sodium_hex2bin(string: $key);
$decoded = base64_decode(string: $encrypted);
if ($decoded === false) {
throw new Exception(message: 'Decoding broken. Wrong key?');
throw new Exception(message: 'Decoding broken. Wrong payload.');
}
if (mb_strlen(string: $decoded, encoding: '8bit') < (SODIUM_CRYPTO_SECRETBOX_NONCEBYTES + SODIUM_CRYPTO_SECRETBOX_MACBYTES)) {
throw new Exception(message: 'Decoding broken. Incomplete message.');
}
$nonce = mb_substr(string: $decoded, start: 0, length: SODIUM_CRYPTO_SECRETBOX_NONCEBYTES, encoding: '8bit');
$ciphertext = mb_substr(string: $decoded, start: SODIUM_CRYPTO_SECRETBOX_NONCEBYTES, length: null, encoding: '8bit');
$plain = sodium_crypto_secretbox_open(ciphertext: $ciphertext, nonce: $nonce, key: $key);
$plain = sodium_crypto_secretbox_open(ciphertext: $ciphertext, nonce: $nonce, key: $binKey);
if ($plain === false) {
throw new Exception(message: 'The message was tampered with in transit');
}