/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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.
 */

#include <benchmark/benchmark.h>

#include <stdlib.h>
#include <stdio.h>

#include <memory>

#include "api/s2n.h"

extern "C" {
#include "utils/s2n_safety.h"
#include "testlib/s2n_testlib.h"
}


static const char *valid_pem_pairs[][2] = {
    { S2N_RSA_2048_PKCS8_CERT_CHAIN,          S2N_RSA_2048_PKCS8_KEY },
    { S2N_RSA_2048_PKCS1_CERT_CHAIN,          S2N_RSA_2048_PKCS1_KEY },
    { S2N_RSA_2048_PKCS1_LEAF_CERT,           S2N_RSA_2048_PKCS1_KEY },
    { S2N_RSA_CERT_CHAIN_CRLF,                S2N_RSA_KEY_CRLF       },
    /* PEMs with no-op data before/after entries are still valid */
    { S2N_LEAF_WHITESPACE_CERT_CHAIN,         S2N_RSA_2048_PKCS1_KEY },
    { S2N_INTERMEDIATE_WHITESPACE_CERT_CHAIN, S2N_RSA_2048_PKCS1_KEY },
    { S2N_ROOT_WHITESPACE_CERT_CHAIN,         S2N_RSA_2048_PKCS1_KEY },
    { S2N_TRAILING_WHITESPACE_CERT_CHAIN,     S2N_RSA_2048_PKCS1_KEY },
    { S2N_LEADING_COMMENT_TEXT_CERT_CHAIN,    S2N_RSA_2048_PKCS1_KEY },
    { S2N_LONG_BASE64_LINES_CERT_CHAIN,       S2N_RSA_2048_PKCS1_KEY },
    { S2N_MISSING_LINE_ENDINGS_CERT_CHAIN,    S2N_RSA_2048_PKCS1_KEY },

    /* Technically Invalid according to RFC, but that we are lenient towards */
    { S2N_INVALID_HEADER_CERT_CHAIN,          S2N_RSA_2048_PKCS1_KEY  },
    { S2N_INVALID_TRAILER_CERT_CHAIN,         S2N_RSA_2048_PKCS1_KEY  },
    { S2N_RSA_2048_PKCS1_CERT_CHAIN,          S2N_INVALID_TRAILER_KEY },
    { S2N_WEIRD_DASHES_CERT_CHAIN,            S2N_RSA_2048_PKCS1_KEY  },
};

static const char *invalid_pem_pairs[][2] = {
    /* Invalid cert PEMs and valid key PEMs */
    { S2N_UNKNOWN_KEYWORD_CERT_CHAIN,         S2N_RSA_2048_PKCS1_KEY  },
    /* Valid cert PEMs and invalid key PEMs */
    { S2N_RSA_2048_PKCS1_CERT_CHAIN,          S2N_INVALID_HEADER_KEY  },
    { S2N_RSA_2048_PKCS1_CERT_CHAIN,          S2N_UNKNOWN_KEYWORD_KEY },
    /* For good measure an invalid cert and invalid key */
    { S2N_UNKNOWN_KEYWORD_CERT_CHAIN,         S2N_UNKNOWN_KEYWORD_KEY },
    { S2N_NO_DASHES_CERT_CHAIN,               S2N_RSA_2048_PKCS1_KEY  },
};

class PemTestFixture {
public:
    void alloc() {
        cert_chain_pem = new char[S2N_MAX_TEST_PEM_SIZE];
        private_key_pem = new char[S2N_MAX_TEST_PEM_SIZE];

        chain_and_key = s2n_cert_chain_and_key_new();
    }

    void free() {
        s2n_cert_chain_and_key_free(chain_and_key);
        delete [] cert_chain_pem;
        delete [] private_key_pem;
    }

    char *cert_chain_pem;
    char *private_key_pem;
    struct s2n_cert_chain_and_key *chain_and_key;

    void load_pem_file(const char *cert, const char *key) {
        s2n_read_test_pem(cert, cert_chain_pem, S2N_MAX_TEST_PEM_SIZE);
        s2n_read_test_pem(key, private_key_pem, S2N_MAX_TEST_PEM_SIZE);
    }


};

class ValidPemTestFixture
    : public benchmark::Fixture
    , public PemTestFixture {
public:

    void SetUp(const ::benchmark::State& state) {
        PemTestFixture::alloc();

        load_pem_file(valid_pem_pairs[state.range(0)][0], valid_pem_pairs[state.range(0)][1]);
    }

    void TearDown(const ::benchmark::State& state) {
        PemTestFixture::free();
    }
};

class InvalidPemTestFixture
    : public benchmark::Fixture
    , public PemTestFixture {
public:

    void SetUp(const ::benchmark::State& state) {
        PemTestFixture::alloc();

        load_pem_file(invalid_pem_pairs[state.range(0)][0], invalid_pem_pairs[state.range(0)][1]);
    }

    void TearDown(const ::benchmark::State& state) {
        PemTestFixture::free();
    }
};

BENCHMARK_DEFINE_F(ValidPemTestFixture, Load_Valid_Pem)(benchmark::State& state) {
    for (auto _ : state) {
        s2n_cert_chain_and_key_load_pem(chain_and_key, cert_chain_pem, private_key_pem);
    }
}

BENCHMARK_DEFINE_F(InvalidPemTestFixture, Load_Invalid_Pem)(benchmark::State& state) {
    for (auto _ : state) {
        s2n_cert_chain_and_key_load_pem(chain_and_key, cert_chain_pem, private_key_pem);
    }
}

BENCHMARK_REGISTER_F(ValidPemTestFixture, Load_Valid_Pem)->DenseRange(0, s2n_array_len(valid_pem_pairs), 1);
BENCHMARK_REGISTER_F(InvalidPemTestFixture, Load_Invalid_Pem)->DenseRange(0, s2n_array_len(invalid_pem_pairs), 1);

BENCHMARK_MAIN();