ParagonIE_Sodium_Compat::crypto_box_secretkey( string $keypair ): string

1635    public static function crypto_box_secretkey(1636        #[\SensitiveParameter]1637        $keypair1638    ) {1639        /* Type checks: */1640        ParagonIE_Sodium_Core_Util::declareScalarType($keypair, 'string', 1);1641 1642        /* Input validation: */1643        if (ParagonIE_Sodium_Core_Util::strlen($keypair) !== self::CRYPTO_BOX_KEYPAIRBYTES) {1644            throw new SodiumException('Argument 1 must be CRYPTO_BOX_KEYPAIRBYTES long.');1645        }1646 1647        if (self::useNewSodiumAPI()) {1648            return (string) sodium_crypto_box_secretkey($keypair);1649        }1650        if (self::use_fallback('crypto_box_secretkey')) {1651            return (string) call_user_func('\\Sodium\\crypto_box_secretkey', $keypair);1652        }1653        if (PHP_INT_SIZE === 4) {1654            return ParagonIE_Sodium_Crypto32::box_secretkey($keypair);1655        }1656        return ParagonIE_Sodium_Crypto::box_secretkey($keypair);1657    }