#include "gnss_crypto.h"
#include <gtest/gtest.h>
class GnssCryptoTest : public ::testing::Test
{
};


TEST(GnssCryptoTest, TestComputeSHA_256)
{
    std::unique_ptr<Gnss_Crypto> d_crypto = std::make_unique<Gnss_Crypto>();
    std::vector<uint8_t> message{0x48, 0x65, 0x6C, 0x6C, 0x6F, 0x20, 0x77, 0x6F, 0x72, 0x6C, 0x64, 0x0A};  // Hello world

    std::vector<uint8_t> expected_output = {
        0x18, 0x94, 0xA1, 0x9C, 0x85, 0xBA, 0x15, 0x3A, 0xCB, 0xF7,
        0x43, 0xAC, 0x4E, 0x43, 0xFC, 0x00, 0x4C, 0x89, 0x16, 0x04, 0xB2,
        0x6F, 0x8C, 0x69, 0xE1, 0xE8, 0x3E, 0xA2, 0xAF, 0xC7, 0xC4, 0x8F};

    std::vector<uint8_t> output = d_crypto->computeSHA256(message);

    ASSERT_EQ(expected_output, output);
}


TEST(GnssCryptoTest, TestComputeSHA3_256)
{
    std::unique_ptr<Gnss_Crypto> d_crypto = std::make_unique<Gnss_Crypto>();
    std::vector<uint8_t> message{0x48, 0x65, 0x6C, 0x6C, 0x6F, 0x20, 0x77, 0x6F, 0x72, 0x6C, 0x64, 0x0A};  // Hello world

    std::vector<uint8_t> expected_output = {
        0xCC, 0xB8, 0xF9, 0x23, 0x5F, 0x4A, 0x93, 0x2C, 0xA0, 0xAB,
        0xBB, 0x2C, 0x24, 0x36, 0x72, 0x5E, 0x2E, 0x8D, 0xC7, 0x5B,
        0x99, 0xE7, 0xF6, 0xC4, 0x50, 0x5B, 0x2A, 0x93, 0x6E, 0xB6, 0x3B, 0x3F};

    std::vector<uint8_t> output = d_crypto->computeSHA3_256(message);

    ASSERT_EQ(expected_output, output);
}


TEST(GnssCryptoTest, VerifySignature)
{
    std::unique_ptr<Gnss_Crypto> d_crypto = std::make_unique<Gnss_Crypto>();

    // RG example  - import crt certificate - result: FAIL
    std::vector<uint8_t> message = {0x82, 0x10, 0x49, 0x22, 0x04, 0xE0, 0x60, 0x61, 0x0B, 0xDF, 0x26, 0xD7, 0x7B, 0x5B, 0xF8, 0xC9, 0xCB, 0xFC, 0xF7, 0x04, 0x22, 0x08, 0x14, 0x75, 0xFD, 0x44, 0x5D, 0xF0, 0xFF};
    std::vector<uint8_t> signature = {0xF8, 0xCD, 0x88, 0x29, 0x9F, 0xA4, 0x60, 0x58, 0x00, 0x20, 0x7B, 0xFE, 0xBE, 0xAC, 0x55, 0x02, 0x40, 0x53, 0xF3, 0x0F, 0x7C, 0x69, 0xB3, 0x5C, 0x15, 0xE6, 0x08, 0x00, 0xAC, 0x3B, 0x6F, 0xE3, 0xED, 0x06, 0x39, 0x95, 0x2F, 0x7B, 0x02, 0x8D, 0x86, 0x86, 0x74, 0x45, 0x96, 0x1F, 0xFE, 0x94, 0xFB, 0x22, 0x6B, 0xFF, 0x70, 0x06, 0xE0, 0xC4, 0x51, 0xEE, 0x3F, 0x87, 0x28, 0xC1, 0x77, 0xFB};
    std::vector<uint8_t> publicKey{// PEM format - 1000 bits
        0x2D, 0x2D, 0x2D, 0x2D, 0x2D, 0x42, 0x45, 0x47, 0x49, 0x4E, 0x20, 0x50, 0x55, 0x42, 0x4C, 0x49, 0x43, 0x20, 0x4B, 0x45, 0x59, 0x2D, 0x2D, 0x2D, 0x2D, 0x2D, 0x0A,
        0x4D, 0x46, 0x6B, 0x77, 0x45, 0x77, 0x59, 0x48, 0x4B, 0x6F, 0x5A, 0x49, 0x7A, 0x6A, 0x30, 0x43, 0x41, 0x51, 0x59, 0x49, 0x4B, 0x6F, 0x5A, 0x49,
        0x7A, 0x6A, 0x30, 0x44, 0x41, 0x51, 0x63, 0x44, 0x51, 0x67, 0x41, 0x45, 0x41, 0x37, 0x4C, 0x4F, 0x5A, 0x4C, 0x77, 0x67, 0x65, 0x39, 0x32, 0x4C, 0x78, 0x4E, 0x2B, 0x46, 0x6B, 0x59, 0x66, 0x38, 0x74, 0x6F, 0x59, 0x79, 0x44, 0x57, 0x50, 0x2F, 0x0A, 0x6F, 0x4A, 0x46, 0x42, 0x44, 0x38, 0x46, 0x59, 0x2B, 0x37,
        0x64, 0x35, 0x67, 0x4F, 0x71, 0x49, 0x61, 0x45, 0x32, 0x52, 0x6A, 0x50, 0x41, 0x6E, 0x4B, 0x49, 0x36, 0x38, 0x73, 0x2F, 0x4F, 0x4B, 0x2F, 0x48, 0x50, 0x67, 0x6F, 0x4C, 0x6B, 0x4F, 0x32, 0x69, 0x6A, 0x51, 0x38, 0x78, 0x41, 0x5A, 0x79, 0x44, 0x64, 0x50, 0x42, 0x31, 0x64, 0x48, 0x53, 0x51, 0x3D, 0x3D,
        0x0A,
        0x2D, 0x2D, 0x2D, 0x2D, 0x2D, 0x45, 0x4E, 0x44, 0x20, 0x50, 0x55, 0x42, 0x4C, 0x49, 0x43, 0x20, 0x4B, 0x45, 0x59, 0x2D, 0x2D, 0x2D, 0x2D, 0x2D, 0x0A};

    d_crypto->set_public_key(publicKey);
    bool result = d_crypto->verify_signature(message, signature);

    ASSERT_TRUE(result);
}


TEST(GnssCryptoTest, VerifyPubKeyImport)
{
    std::unique_ptr<Gnss_Crypto> d_crypto = std::make_unique<Gnss_Crypto>();

    std::vector<uint8_t> publicKey{// PEM
        0x2D, 0x2D, 0x2D, 0x2D, 0x2D, 0x42, 0x45, 0x47, 0x49, 0x4E, 0x20, 0x50, 0x55, 0x42, 0x4C, 0x49, 0x43, 0x20, 0x4B, 0x45, 0x59, 0x2D, 0x2D, 0x2D, 0x2D, 0x2D, 0x0A,
        0x4D, 0x46,
        0x6B, 0x77, 0x45, 0x77, 0x59, 0x48, 0x4B, 0x6F, 0x5A, 0x49, 0x7A, 0x6A, 0x30, 0x43, 0x41, 0x51, 0x59, 0x49, 0x4B, 0x6F, 0x5A, 0x49, 0x7A, 0x6A, 0x30, 0x44, 0x41, 0x51, 0x63,
        0x44, 0x51, 0x67, 0x41, 0x45, 0x53, 0x76, 0x50, 0x75, 0x4F, 0x70, 0x51, 0x6C, 0x4A, 0x54, 0x31, 0x56, 0x77, 0x6C, 0x72, 0x43, 0x4C, 0x63, 0x38, 0x55, 0x54, 0x54, 0x6B, 0x4E,
        0x73, 0x66, 0x78, 0x2F, 0x0A, 0x4D, 0x56, 0x6F, 0x71, 0x47, 0x61, 0x35, 0x4F, 0x31, 0x73, 0x75, 0x6D, 0x57, 0x64, 0x61, 0x5A, 0x66, 0x4F, 0x69, 0x39, 0x48, 0x30, 0x4D, 0x30,
        0x48, 0x46, 0x6E, 0x5A, 0x32, 0x63, 0x72, 0x44, 0x37, 0x6C, 0x6A, 0x6C, 0x36, 0x74, 0x4E, 0x56, 0x52, 0x4F, 0x71, 0x4A, 0x63, 0x57, 0x58, 0x51, 0x6B, 0x6E, 0x4B, 0x69, 0x79,
        0x44, 0x79, 0x48, 0x58, 0x51, 0x3D, 0x3D, 0x0A,
        0x2D, 0x2D, 0x2D, 0x2D, 0x2D, 0x45, 0x4E, 0x44, 0x20, 0x50, 0x55, 0x42, 0x4C, 0x49, 0x43, 0x20, 0x4B, 0x45, 0x59, 0x2D, 0x2D,
        0x2D, 0x2D, 0x2D, 0x0A};

    d_crypto->set_public_key(publicKey);

    ASSERT_TRUE(d_crypto->have_public_key());
}


// Unit test for computeHMAC_SHA_256 function.
TEST(GnssCryptoTest, TestComputeHMACSHA256)
{
    std::unique_ptr<Gnss_Crypto> d_crypto = std::make_unique<Gnss_Crypto>();

    std::vector<uint8_t> key = {
        0x24, 0x24, 0x3B, 0x76, 0xF9, 0x14, 0xB1, 0xA7,
        0x7D, 0x48, 0xE7, 0xF1, 0x48, 0x0C, 0xC2, 0x98,
        0xEB, 0x62, 0x3E, 0x95, 0x6B, 0x2B, 0xCE, 0xA3,
        0xB4, 0xD4, 0xDB, 0x31, 0xEE, 0x96, 0xAB, 0xFA};

    std::vector<uint8_t> message{0x48, 0x65, 0x6C, 0x6C, 0x6F, 0x20, 0x77, 0x6F, 0x72, 0x6C, 0x64, 0x0A};  // Hello world con 0x0A
    std::vector<uint8_t> expected_output = {
        0xC3, 0x51, 0xF6, 0xFD, 0xDD, 0xC9, 0x8B, 0x41,
        0xD6, 0xF4, 0x77, 0x6D, 0xAC, 0xE8, 0xE0, 0x14,
        0xB2, 0x7A, 0xCC, 0x22, 0x00, 0xAA, 0xD2, 0x37,
        0xD0, 0x79, 0x06, 0x12, 0x83, 0x40, 0xB7, 0xA6};

    std::vector<uint8_t> output = d_crypto->computeHMAC_SHA_256(key, message);

    ASSERT_EQ(expected_output, output);
}


TEST(GnssCryptoTest, TestComputeHMACSHA256_m0)
{
    // key and message generated from RG A.6.5.1
    std::unique_ptr<Gnss_Crypto> d_crypto = std::make_unique<Gnss_Crypto>();

    std::vector<uint8_t> key = {// RG K4 @ 345690
        0x69, 0xC0, 0x0A, 0xA7, 0x36, 0x42, 0x37, 0xA6,
        0x5E, 0xBF, 0x00, 0x6A, 0xD8, 0xDD, 0xBC, 0x73};

    std::vector<uint8_t> message{// m0
        0x02, 0x4E, 0x05, 0x46, 0x3C, 0x01, 0x83, 0xA5, 0x91, 0x05, 0x1D, 0x69, 0x25, 0x80, 0x07, 0x6B,
        0x3E, 0xEA, 0x81, 0x41, 0xBF, 0x03, 0xAD, 0xCB, 0x5A, 0xAD, 0xB2, 0x77, 0xAF, 0x6F, 0xCF, 0x21,
        0xFB, 0x98, 0xFF, 0x7E, 0x83, 0xAF, 0xFC, 0x37, 0x02, 0x03, 0xB0, 0xD8, 0xE1, 0x0E, 0xB1, 0x4D,
        0x11, 0x18, 0xE6, 0xB0, 0xE8, 0x20, 0x01, 0xA0, 0x00, 0xE5, 0x91, 0x00, 0x06, 0xD3, 0x1F, 0x00,
        0x02, 0x68, 0x05, 0x4A, 0x02, 0xC2, 0x26, 0x07, 0xF7, 0xFC, 0x00};

    std::vector<uint8_t> expected_output = {
        0xE3, 0x7B, 0xC4, 0xF8, 0x58, 0xAE, 0x1E, 0x5C,
        0xFD, 0xC4, 0x6F, 0x05, 0x4B, 0x1F, 0x47, 0xB9, 0xD2, 0xEA, 0x61, 0xE1,
        0xEF, 0x09, 0x11, 0x5C, 0xFE, 0x70, 0x68, 0x52, 0xBF, 0xF2, 0x3A, 0x83};

    std::vector<uint8_t> output = d_crypto->computeHMAC_SHA_256(key, message);

    ASSERT_EQ(expected_output, output);
}


TEST(GnssCryptoTest, TestComputeHMACSHA256_adkd4)
{
    // key and message generated from RG A.6.5.2
    std::unique_ptr<Gnss_Crypto> d_crypto = std::make_unique<Gnss_Crypto>();

    std::vector<uint8_t> key = {// RG K4 @ 345690
        0x69, 0xC0, 0x0A, 0xA7, 0x36, 0x42, 0x37, 0xA6,
        0x5E, 0xBF, 0x00, 0x6A, 0xD8, 0xDD, 0xBC, 0x73};

    std::vector<uint8_t> message{
        0x02, 0x02, 0x4E, 0x05, 0x46, 0x3C, 0x03, 0xBF,
        0xFF, 0xFF, 0xFF, 0xC0, 0x00, 0x00, 0x44, 0x92, 0x38,
        0x22, 0x78, 0x97, 0xFD, 0xEF, 0xF9, 0x30, 0x40};

    std::vector<uint8_t> expected_output = {
        0x7B, 0xB2, 0x38, 0xC8, 0x83, 0xC0, 0x6A, 0x2B, 0x50, 0x8F,
        0xE6, 0x3F, 0xB7, 0xF4, 0xF5, 0x4D, 0x44, 0xAB, 0xEE, 0x4D,
        0xCE, 0xB9, 0x3D, 0xCF, 0x65, 0xCB, 0x3A, 0x5B, 0x81, 0x4A, 0x34, 0xE9};

    std::vector<uint8_t> output = d_crypto->computeHMAC_SHA_256(key, message);

    ASSERT_EQ(expected_output, output);
}


TEST(GnssCryptoTest, TestComputeCMAC_AES)
{
    // Tests vectors from https://datatracker.ietf.org/doc/html/rfc4493#appendix-A
    std::unique_ptr<Gnss_Crypto> d_crypto = std::make_unique<Gnss_Crypto>();

    std::vector<uint8_t> key = {
        0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6,
        0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C};

    std::vector<uint8_t> message{
        0x6B, 0xC1, 0xBE, 0xE2, 0x2E, 0x40, 0x9F, 0x96,
        0xE9, 0x3D, 0x7E, 0x11, 0x73, 0x93, 0x17, 0x2A};

    std::vector<uint8_t> expected_output = {
        0x07, 0x0A, 0x16, 0xB4, 0x6B, 0x4D, 0x41, 0x44,
        0xF7, 0x9B, 0xDD, 0x9D, 0xD0, 0x4A, 0x28, 0x7C};

    std::vector<uint8_t> output = d_crypto->computeCMAC_AES(key, message);

    ASSERT_EQ(expected_output, output);
}