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Summery Summery
Decrypt a message previously encrypted with crypto_box().
Syntax Syntax
Parameters Parameters
- $ciphertext
-
(Required) Encrypted message
- $nonce
-
(Required) Number to only be used Once; must be 24 bytes
- $keypair
-
(Required) Your secret key and the sender's public key
Return Return
(string) The original plaintext message
Source Source
File: wp-includes/sodium_compat/src/Compat.php
public static function crypto_box_open($ciphertext, $nonce, $keypair)
{
/* Type checks: */
ParagonIE_Sodium_Core_Util::declareScalarType($ciphertext, 'string', 1);
ParagonIE_Sodium_Core_Util::declareScalarType($nonce, 'string', 2);
ParagonIE_Sodium_Core_Util::declareScalarType($keypair, 'string', 3);
/* Input validation: */
if (ParagonIE_Sodium_Core_Util::strlen($ciphertext) < self::CRYPTO_BOX_MACBYTES) {
throw new SodiumException('Argument 1 must be at least CRYPTO_BOX_MACBYTES long.');
}
if (ParagonIE_Sodium_Core_Util::strlen($nonce) !== self::CRYPTO_BOX_NONCEBYTES) {
throw new SodiumException('Argument 2 must be CRYPTO_BOX_NONCEBYTES long.');
}
if (ParagonIE_Sodium_Core_Util::strlen($keypair) !== self::CRYPTO_BOX_KEYPAIRBYTES) {
throw new SodiumException('Argument 3 must be CRYPTO_BOX_KEYPAIRBYTES long.');
}
if (self::useNewSodiumAPI()) {
/**
* @psalm-suppress InvalidReturnStatement
* @psalm-suppress FalsableReturnStatement
*/
return sodium_crypto_box_open($ciphertext, $nonce, $keypair);
}
if (self::use_fallback('crypto_box_open')) {
return call_user_func('\\Sodium\\crypto_box_open', $ciphertext, $nonce, $keypair);
}
if (PHP_INT_SIZE === 4) {
return ParagonIE_Sodium_Crypto32::box_open($ciphertext, $nonce, $keypair);
}
return ParagonIE_Sodium_Crypto::box_open($ciphertext, $nonce, $keypair);
}