ParagonIE_Sodium_Compat::crypto_generichash_init( string|null $key = '', int $length = self::CRYPTO_GENERICHASH_BYTES ): string

1806    public static function crypto_generichash_init(1807        #[\SensitiveParameter]1808        $key = '',1809        $length = self::CRYPTO_GENERICHASH_BYTES1810    ) {1811        /* Type checks: */1812        if (is_null($key)) {1813            $key = '';1814        }1815        ParagonIE_Sodium_Core_Util::declareScalarType($key, 'string', 1);1816        ParagonIE_Sodium_Core_Util::declareScalarType($length, 'int', 2);1817 1818        /* Input validation: */1819        if (!empty($key)) {1820            if (ParagonIE_Sodium_Core_Util::strlen($key) < self::CRYPTO_GENERICHASH_KEYBYTES_MIN) {1821                throw new SodiumException('Unsupported key size. Must be at least CRYPTO_GENERICHASH_KEYBYTES_MIN bytes long.');1822            }1823            if (ParagonIE_Sodium_Core_Util::strlen($key) > self::CRYPTO_GENERICHASH_KEYBYTES_MAX) {1824                throw new SodiumException('Unsupported key size. Must be at most CRYPTO_GENERICHASH_KEYBYTES_MAX bytes long.');1825            }1826        }1827 1828        if (self::useNewSodiumAPI()) {1829            return sodium_crypto_generichash_init($key, $length);1830        }1831        if (self::use_fallback('crypto_generichash_init')) {1832            return (string) call_user_func('\\Sodium\\crypto_generichash_init', $key, $length);1833        }1834        if (PHP_INT_SIZE === 4) {1835            return ParagonIE_Sodium_Crypto32::generichash_init($key, $length);1836        }1837        return ParagonIE_Sodium_Crypto::generichash_init($key, $length);1838    }