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sodium_crypto_secretbox

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_secretboxAuthenticated shared-key encryption

Description

sodium_crypto_secretbox(string $message, string $nonce, string $key): string

Encrypt a message with a symmetric (shared) key.

Liste de param├Ętres

message

The 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()).

key

Encryption key (256-bit).

Valeurs de retour

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User Contributed Notes 1 note

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celso fontes
1 year ago
An example to how encrypt or decrypt using sodium:

<?php

$key
= random_bytes(SODIUM_CRYPTO_SECRETBOX_KEYBYTES);

$nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES);
$ciphertext = sodium_crypto_secretbox("Hello World !", $nonce, $key);

$plaintext = sodium_crypto_secretbox_open($ciphertext, $nonce, $key);
if (
$plaintext === false) {
    throw new
Exception("Bad ciphertext");
}

echo
$plaintext;
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