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sodium_crypto_secretbox_open

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_secretbox_openAuthenticated shared-key decryption

Beschreibung

sodium_crypto_secretbox_open ( string $ciphertext , string $nonce , string $key ) : string|false

Decrypt an encrypted message with a symmetric (shared) key.

Parameter-Liste

ciphertext

Must be in the format provided by sodium_crypto_secretbox() (ciphertext and tag, concatenated).

nonce

A number that must be only used once, per message. 24 bytes long. This is a large enough bound to generate randomly (i.e. random_bytes()).

key

Encryption key (256-bit).

R├╝ckgabewerte

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khalyomede at gmail dot com
2 years ago
This method will return a string, or false if the data failed to be decrypted.

$key = 'secret';
$data = 'binarydata';
$nonce = random_bytes(SODIUM_CRYPT_SECRETBOX_NONCEBYTES);

$decrypted = sodium_crypto_secretbox_open($data, $nonce, $key);

if ($decrypted === false) {
  throw new Exception('failed to decrypt data');
}
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