sodium_crypto_secretbox_open

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_secretbox_open — Authenticated shared-key decryption

说明

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

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

参数

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).

返回值

User Contributed Notes

khalyomede at gmail dot com 31-Dec-2018 11:26


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');

}