public static function ParagonIE_Sodium_Crypto32::aead_chacha20poly1305_encrypt in Automatic Updates 7
Same name and namespace in other branches
- 8 vendor/paragonie/sodium_compat/src/Crypto32.php \ParagonIE_Sodium_Crypto32::aead_chacha20poly1305_encrypt()
AEAD Encryption with ChaCha20-Poly1305
@internal Do not use this directly. Use ParagonIE_Sodium_Compat.
Parameters
string $message:
string $ad:
string $nonce:
string $key:
Return value
string
Throws
SodiumException
TypeError
1 call to ParagonIE_Sodium_Crypto32::aead_chacha20poly1305_encrypt()
- ParagonIE_Sodium_Compat::crypto_aead_chacha20poly1305_encrypt in vendor/
paragonie/ sodium_compat/ src/ Compat.php - Authenticated Encryption with Associated Data
File
- vendor/
paragonie/ sodium_compat/ src/ Crypto32.php, line 143
Class
- ParagonIE_Sodium_Crypto32
- Class ParagonIE_Sodium_Crypto
Code
public static function aead_chacha20poly1305_encrypt($message = '', $ad = '', $nonce = '', $key = '') {
/** @var int $len - Length of the plaintext message */
$len = ParagonIE_Sodium_Core32_Util::strlen($message);
/** @var int $adlen - Length of the associated data */
$adlen = ParagonIE_Sodium_Core32_Util::strlen($ad);
/** @var string The first block of the chacha20 keystream, used as a poly1305 key */
$block0 = ParagonIE_Sodium_Core32_ChaCha20::stream(32, $nonce, $key);
$state = new ParagonIE_Sodium_Core32_Poly1305_State($block0);
try {
ParagonIE_Sodium_Compat::memzero($block0);
} catch (SodiumException $ex) {
$block0 = null;
}
/** @var string $ciphertext - Raw encrypted data */
$ciphertext = ParagonIE_Sodium_Core32_ChaCha20::streamXorIc($message, $nonce, $key, ParagonIE_Sodium_Core32_Util::store64_le(1));
$state
->update($ad);
$state
->update(ParagonIE_Sodium_Core32_Util::store64_le($adlen));
$state
->update($ciphertext);
$state
->update(ParagonIE_Sodium_Core32_Util::store64_le($len));
return $ciphertext . $state
->finish();
}