/*
 * Copyright 2024 Vsevolod Stakhov
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* Detached unit tests for the dkim utils */

#ifndef RSPAMD_RSPAMD_CXX_UNIT_DKIM_HXX
#define RSPAMD_RSPAMD_CXX_UNIT_DKIM_HXX

#define DOCTEST_CONFIG_IMPLEMENTATION_IN_DLL
#include "doctest/doctest.h"
#include "fmt/base.h"
#include "libserver/dkim.h"

#include <vector>
#include <utility>
#include <string>
#include <tuple>

TEST_SUITE("rspamd_dkim")
{

	TEST_CASE("rspamd_dkim_parse_key")
	{
		struct test_case {
			std::string input;
			bool is_valid;
			std::string expected_id;
		};
		std::vector<test_case> cases{
			{"p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCA"
			 "QEA5CeQZpoPbsS8lG41UI1rxTtOSqPrfgZzhrZsk0t9dIbFTvaoql/FLuYcbdUARc"
			 "5zuyXsDj1eSprOgcPT9PY9RoSUsY8i/jnD49DHXtMfXoBk0J6epNzbZqqWU+"
			 "TG02HwWNy/kf1h+OlAGQKJLgakivZ3nMMnUIPHkUjwvhbkaMXCI046XoqsEQ7KW"
			 "VKRoF3cK1cFXLo+bgO3sEJgGtvwzPodG0CqVu+gjehrjwdLnPhqyEspfI1IbL"
			 "lnNaq5pWei/B8pG6teV+y3t4yay5ZGktALJjlylKHVo2USkVYQTFQ9Ji25m2jupdCd"
			 "kn1FTuYNqh0Nzg3KPQHNVp7mlE7lfwIDAQAB",
			 true, "e40cc5c40ee29cb4f21d95c7f0dc9989"},
			// Spaces before p
			{"   p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCA"
			 "QEA5CeQZpoPbsS8lG41UI1rxTtOSqPrfgZzhrZsk0t9dIbFTvaoql/FLuYcbdUARc"
			 "5zuyXsDj1eSprOgcPT9PY9RoSUsY8i/jnD49DHXtMfXoBk0J6epNzbZqqWU+"
			 "TG02HwWNy/kf1h+OlAGQKJLgakivZ3nMMnUIPHkUjwvhbkaMXCI046XoqsEQ7KW"
			 "VKRoF3cK1cFXLo+bgO3sEJgGtvwzPodG0CqVu+gjehrjwdLnPhqyEspfI1IbL"
			 "lnNaq5pWei/B8pG6teV+y3t4yay5ZGktALJjlylKHVo2USkVYQTFQ9Ji25m2jupdCd"
			 "kn1FTuYNqh0Nzg3KPQHNVp7mlE7lfwIDAQAB",
			 true, "e40cc5c40ee29cb4f21d95c7f0dc9989"},
			// Spaces and bogus semicolon before p
			{";  p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCA"
			 "QEA5CeQZpoPbsS8lG41UI1rxTtOSqPrfgZzhrZsk0t9dIbFTvaoql/FLuYcbdUARc"
			 "5zuyXsDj1eSprOgcPT9PY9RoSUsY8i/jnD49DHXtMfXoBk0J6epNzbZqqWU+"
			 "TG02HwWNy/kf1h+OlAGQKJLgakivZ3nMMnUIPHkUjwvhbkaMXCI046XoqsEQ7KW"
			 "VKRoF3cK1cFXLo+bgO3sEJgGtvwzPodG0CqVu+gjehrjwdLnPhqyEspfI1IbL"
			 "lnNaq5pWei/B8pG6teV+y3t4yay5ZGktALJjlylKHVo2USkVYQTFQ9Ji25m2jupdCd"
			 "kn1FTuYNqh0Nzg3KPQHNVp7mlE7lfwIDAQAB",
			 true, "e40cc5c40ee29cb4f21d95c7f0dc9989"},
			// Spaces after p
			{"k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCA"
			 "QEA5CeQZpoPbsS8lG41UI1rxTtOSqPrfgZzhrZsk0t9dIbFTvaoql/FLuYcbdUARc"
			 "5zuyXsDj1eSprOgcPT9PY9RoSUsY8i/jnD49DHXtMfXoBk0J6epNzbZqqWU+"
			 "TG02HwWNy/kf1h+OlAGQKJLgakivZ3nMMnUIPHkUjwvhbkaMXCI046XoqsEQ7KW"
			 "VKRoF3cK1cFXLo+bgO3sEJgGtvwzPodG0CqVu+gjehrjwdLnPhqyEspfI1IbL"
			 "lnNaq5pWei/B8pG6teV+y3t4yay5ZGktALJjlylKHVo2USkVYQTFQ9Ji25m2jupdCd"
			 "kn1FTuYNqh0Nzg3KPQHNVp7mlE7lfwIDAQAB      ",
			 true, "e40cc5c40ee29cb4f21d95c7f0dc9989"},
			// ; and spaces
			{"k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCA"
			 "QEA5CeQZpoPbsS8lG41UI1rxTtOSqPrfgZzhrZsk0t9dIbFTvaoql/FLuYcbdUARc"
			 "5zuyXsDj1eSprOgcPT9PY9RoSUsY8i/jnD49DHXtMfXoBk0J6epNzbZqqWU+"
			 "TG02HwWNy/kf1h+OlAGQKJLgakivZ3nMMnUIPHkUjwvhbkaMXCI046XoqsEQ7KW"
			 "VKRoF3cK1cFXLo+bgO3sEJgGtvwzPodG0CqVu+gjehrjwdLnPhqyEspfI1IbL"
			 "lnNaq5pWei/B8pG6teV+y3t4yay5ZGktALJjlylKHVo2USkVYQTFQ9Ji25m2jupdCd"
			 "kn1FTuYNqh0Nzg3KPQHNVp7mlE7lfwIDAQAB  ;    ",
			 true, "e40cc5c40ee29cb4f21d95c7f0dc9989"},
			// ; and spaces around '=' sign
			{"k=rsa; t=s; p =   MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCA"
			 "QEA5CeQZpoPbsS8lG41UI1rxTtOSqPrfgZzhrZsk0t9dIbFTvaoql/FLuYcbdUARc"
			 "5zuyXsDj1eSprOgcPT9PY9RoSUsY8i/jnD49DHXtMfXoBk0J6epNzbZqqWU+"
			 "TG02HwWNy/kf1h+OlAGQKJLgakivZ3nMMnUIPHkUjwvhbkaMXCI046XoqsEQ7KW"
			 "VKRoF3cK1cFXLo+bgO3sEJgGtvwzPodG0CqVu+gjehrjwdLnPhqyEspfI1IbL"
			 "lnNaq5pWei/B8pG6teV+y3t4yay5ZGktALJjlylKHVo2USkVYQTFQ9Ji25m2jupdCd"
			 "kn1FTuYNqh0Nzg3KPQHNVp7mlE7lfwIDAQAB;",
			 true, "e40cc5c40ee29cb4f21d95c7f0dc9989"},
			// ; and spaces around '=' sign + bad stuff
			{"ololo k=rsa; t=s; p =   MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCA"
			 "QEA5CeQZpoPbsS8lG41UI1rxTtOSqPrfgZzhrZsk0t9dIbFTvaoql/FLuYcbdUARc"
			 "5zuyXsDj1eSprOgcPT9PY9RoSUsY8i/jnD49DHXtMfXoBk0J6epNzbZqqWU+"
			 "TG02HwWNy/kf1h+OlAGQKJLgakivZ3nMMnUIPHkUjwvhbkaMXCI046XoqsEQ7KW"
			 "VKRoF3cK1cFXLo+bgO3sEJgGtvwzPodG0CqVu+gjehrjwdLnPhqyEspfI1IbL"
			 "lnNaq5pWei/B8pG6teV+y3t4yay5ZGktALJjlylKHVo2USkVYQTFQ9Ji25m2jupdCd"
			 "kn1FTuYNqh0Nzg3KPQHNVp7mlE7lfwIDAQAB;",
			 true, "e40cc5c40ee29cb4f21d95c7f0dc9989"},
			// ; and spaces around '=' sign + bad stuff
			{"ololo=trololo; k=rsa; t=s; "
			 "p =   MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCA"
			 "QEA5CeQZpoPbsS8lG41UI1rxTtOSqPrfgZzhrZsk0t9dIbFTvaoql/FLuYcbdUARc"
			 "5zuyXsDj1eSprOgcPT9PY9RoSUsY8i/jnD49DHXtMfXoBk0J6epNzbZqqWU+"
			 "TG02HwWNy/kf1h+OlAGQKJLgakivZ3nMMnUIPHkUjwvhbkaMXCI046XoqsEQ7KW"
			 "VKRoF3cK1cFXLo+bgO3sEJgGtvwzPodG0CqVu+gjehrjwdLnPhqyEspfI1IbL"
			 "lnNaq5pWei/B8pG6teV+y3t4yay5ZGktALJjlylKHVo2USkVYQTFQ9Ji25m2jupdCd"
			 "kn1FTuYNqh0Nzg3KPQHNVp7mlE7lfwIDAQAB ",
			 true, "e40cc5c40ee29cb4f21d95c7f0dc9989"},
			// Spaces within base64
			{"p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCA"
			 " QEA5CeQZpoPbsS8lG41UI1rxTtOSqPrfgZzhrZsk0t9dIbFTvaoql/FLuYcbdUARc"
			 "  5zuyXsDj1eSprOgcPT9PY9RoSUsY8i/ jnD49DHXtMfXoBk0J6epNzbZqqWU+"
			 "  TG02HwWNy/kf1h+OlAGQKJLgakivZ3nMMnUIPHkUjwvhbkaMXCI046XoqsEQ7KW"
			 "  VKRoF3cK1cFXLo+bgO3sEJgGtvwzPodG0CqVu+gjehrjwdLnPhqyEspfI1IbL"
			 "  lnNaq5pWei/B8pG6teV+y3t4yay5ZGktALJjlylKHVo2USkVYQTFQ9Ji25m2jupdCd"
			 " kn1FTuYNqh0Nzg3KPQHNVp7mlE7lfwIDAQAB",
			 true, "e40cc5c40ee29cb4f21d95c7f0dc9989"},
			// Invalid RSA
			{"ololo=trololo; k=rsa; t=s; "
			 "p =   BADMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCA"
			 "QEA5CeQZpoPbsS8lG41UI1rxTtOSqPrfgZzhrZsk0t9dIbFTvaoql/FLuYcbdUARc"
			 "5zuyXsDj1eSprOgcPT9PY9RoSUsY8i/jnD49DHXtMfXoBk0J6epNzbZqqWU+"
			 "TG02HwWNy/kf1h+OlAGQKJLgakivZ3nMMnUIPHkUjwvhbkaMXCI046XoqsEQ7KW"
			 "VKRoF3cK1cFXLo+bgO3sEJgGtvwzPodG0CqVu+gjehrjwdLnPhqyEspfI1IbL"
			 "lnNaq5pWei/B8pG6teV+y3t4yay5ZGktALJjlylKHVo2USkVYQTFQ9Ji25m2jupdCd"
			 "kn1FTuYNqh0Nzg3KPQHNVp7mlE7lfwIDAQAB ",
			 false, ""},
			// Invalid RSA for eddsa
			{"ololo=trololo; k=ed25519; t=s; "
			 "p =   MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCA"
			 "QEA5CeQZpoPbsS8lG41UI1rxTtOSqPrfgZzhrZsk0t9dIbFTvaoql/FLuYcbdUARc"
			 "5zuyXsDj1eSprOgcPT9PY9RoSUsY8i/jnD49DHXtMfXoBk0J6epNzbZqqWU+"
			 "TG02HwWNy/kf1h+OlAGQKJLgakivZ3nMMnUIPHkUjwvhbkaMXCI046XoqsEQ7KW"
			 "VKRoF3cK1cFXLo+bgO3sEJgGtvwzPodG0CqVu+gjehrjwdLnPhqyEspfI1IbL"
			 "lnNaq5pWei/B8pG6teV+y3t4yay5ZGktALJjlylKHVo2USkVYQTFQ9Ji25m2jupdCd"
			 "kn1FTuYNqh0Nzg3KPQHNVp7mlE7lfwIDAQAB ",
			 false, ""},
		};

		auto cur_test_idx = 0;
		for (auto &&c: cases) {
			SUBCASE(fmt::format("process DKIM record {}: {}", cur_test_idx++, c.input).c_str())
			{
				GError *err = nullptr;
				gsize klen = c.input.size();
				auto *key = rspamd_dkim_parse_key(c.input.c_str(), &klen, &err);
				if (c.is_valid) {
					REQUIRE_MESSAGE(key != nullptr, (err ? err->message : "unknown error"));
					char hexbuf[RSPAMD_DKIM_KEY_ID_LEN * 2 + 1];
					auto *id = rspamd_dkim_key_id(key);
					REQUIRE(id != nullptr);

					auto hexlen = rspamd_encode_hex_buf(id, RSPAMD_DKIM_KEY_ID_LEN, hexbuf,
														sizeof(hexbuf));
					CHECK(hexlen > 0);
					CHECK(std::string{hexbuf, (std::size_t) hexlen} == c.expected_id);
					rspamd_dkim_key_free(key);
				}
				else {
					CHECK(key == nullptr);
				}
			}
		}
	}
}

#endif