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sodium_crypto_secretbox

sodium_crypto_secretbox

Authenticated shared-key encryption

string **sodium_crypto_secretbox** string $message string $nonce string $key

Encrypt a message with a symmetric (shared) key.

messageThe plaintext message to encrypt.

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

keyEncryption key (256-bit).

Returns the encrypted string.

  • If has a length of bytes different than (24 bytes), a will be thrown. nonceSODIUM_CRYPTO_SECRETBOX_NONCEBYTESSodiumException
  • If has a length of bytes different than (32 bytes), a will be thrown. keySODIUM_CRYPTO_SECRETBOX_KEYBYTESSodiumException
  • Throws a on failure. SodiumException

Voorbeeld: example

<?php
// The $key must be kept confidential
$key = sodium_crypto_secretbox_keygen();
// Do not reuse $nonce with the same key
$nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES);
$plaintext = "message to be encrypted";
$ciphertext = sodium_crypto_secretbox($plaintext, $nonce, $key);

var_dump(bin2hex($ciphertext));
// The same nonce and key are required to decrypt the $ciphertext
var_dump(sodium_crypto_secretbox_open($ciphertext, $nonce, $key));
?>

string(78) "3a1fa3e9f7b72ef8be51d40abf8e296c6899c185d07b18b4c93e7f26aa776d24c50852cd6b1076"
string(23) "message to be encrypted"

sodium_crypto_secretbox_open``sodium_crypto_secretbox_keygen``random_bytes

Vorige ← sodium_crypto_secretbox_open Volgende sodium_crypto_secretstream_xchacha20poly1305_init_pull →

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