Hướng dẫn dùng secretbox trong PHP

[PHP 7 >= 7.2.0, PHP 8]

sodium_crypto_secretbox — Authenticated shared-key encryption

Description

sodium_crypto_secretbox[string $message, string $nonce, string $key]: string

Parameters

The plaintext message to encrypt.

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[]].

Encryption key [256-bit].

Return Values

Returns the encrypted string.

Errors/Exceptions

• If nonce has a length of bytes different than SODIUM_CRYPTO_SECRETBOX_NONCEBYTES [24 bytes], a SodiumException will be thrown.
• If key has a length of bytes different than SODIUM_CRYPTO_SECRETBOX_KEYBYTES [32 bytes], a SodiumException will be thrown.
• Throws a SodiumException on failure.

Examples

Example #1 sodium_crypto_secretbox[] example

The above example will output something similar to:

string[78] "3a1fa3e9f7b72ef8be51d40abf8e296c6899c185d07b18b4c93e7f26aa776d24c50852cd6b1076"
string[23] "message to be encrypted"

See Also

• sodium_crypto_secretbox_open[] - Authenticated shared-key decryption
• sodium_crypto_secretbox_keygen[] - Generate random key for sodium_crypto_secretbox
• random_bytes[] - Generates cryptographically secure pseudo-random bytes

celso fontes ¶

2 years ago

An example to how encrypt or decrypt using sodium:

The above example will output:

See Also

• sodium_crypto_secretbox[] - Authenticated shared-key encryption
• sodium_crypto_secretbox_keygen[] - Generate random key for sodium_crypto_secretbox
• random_bytes[] - Generates cryptographically secure pseudo-random bytes

khalyomede at gmail dot com ¶

3 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'];
}