serenity/Tests/LibCrypto/TestPoly1305.cpp

/*
 * Copyright (c) 2022, stelar7 <dudedbz@gmail.com>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <AK/ByteBuffer.h>
#include <LibCrypto/Authentication/Poly1305.h>
#include <LibTest/TestCase.h>

// https://datatracker.ietf.org/doc/html/rfc8439#appendix-A.3
TEST_CASE(test_vector_1)
{
    u8 key[32] { 0 };
    u8 message[64] { 0 };
    u8 expected_result[16] { 0 };

    Crypto::Authentication::Poly1305 mac(ReadonlyBytes { key, 32 });
    mac.update(ReadonlyBytes { message, 64 });
    auto result = MUST(mac.digest());

    EXPECT(memcmp(result.data(), expected_result, 16) == 0);
}

TEST_CASE(test_vector_2)
{
    u8 key[32] {
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x36, 0xe5, 0xf6, 0xb5, 0xc5, 0xe0, 0x60, 0x70, 0xf0, 0xef, 0xca, 0x96, 0x22, 0x7a, 0x86, 0x3e
    };

    u8 message[375] {
        0x41, 0x6e, 0x79, 0x20, 0x73, 0x75, 0x62, 0x6d, 0x69, 0x73, 0x73, 0x69, 0x6f, 0x6e, 0x20, 0x74,
        0x6f, 0x20, 0x74, 0x68, 0x65, 0x20, 0x49, 0x45, 0x54, 0x46, 0x20, 0x69, 0x6e, 0x74, 0x65, 0x6e,
        0x64, 0x65, 0x64, 0x20, 0x62, 0x79, 0x20, 0x74, 0x68, 0x65, 0x20, 0x43, 0x6f, 0x6e, 0x74, 0x72,
        0x69, 0x62, 0x75, 0x74, 0x6f, 0x72, 0x20, 0x66, 0x6f, 0x72, 0x20, 0x70, 0x75, 0x62, 0x6c, 0x69,
        0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x61, 0x73, 0x20, 0x61, 0x6c, 0x6c, 0x20, 0x6f, 0x72,
        0x20, 0x70, 0x61, 0x72, 0x74, 0x20, 0x6f, 0x66, 0x20, 0x61, 0x6e, 0x20, 0x49, 0x45, 0x54, 0x46,
        0x20, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2d, 0x44, 0x72, 0x61, 0x66, 0x74, 0x20,
        0x6f, 0x72, 0x20, 0x52, 0x46, 0x43, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x61, 0x6e, 0x79, 0x20, 0x73,
        0x74, 0x61, 0x74, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x20, 0x6d, 0x61, 0x64, 0x65, 0x20, 0x77, 0x69,
        0x74, 0x68, 0x69, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74,
        0x20, 0x6f, 0x66, 0x20, 0x61, 0x6e, 0x20, 0x49, 0x45, 0x54, 0x46, 0x20, 0x61, 0x63, 0x74, 0x69,
        0x76, 0x69, 0x74, 0x79, 0x20, 0x69, 0x73, 0x20, 0x63, 0x6f, 0x6e, 0x73, 0x69, 0x64, 0x65, 0x72,
        0x65, 0x64, 0x20, 0x61, 0x6e, 0x20, 0x22, 0x49, 0x45, 0x54, 0x46, 0x20, 0x43, 0x6f, 0x6e, 0x74,
        0x72, 0x69, 0x62, 0x75, 0x74, 0x69, 0x6f, 0x6e, 0x22, 0x2e, 0x20, 0x53, 0x75, 0x63, 0x68, 0x20,
        0x73, 0x74, 0x61, 0x74, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x73, 0x20, 0x69, 0x6e, 0x63, 0x6c, 0x75,
        0x64, 0x65, 0x20, 0x6f, 0x72, 0x61, 0x6c, 0x20, 0x73, 0x74, 0x61, 0x74, 0x65, 0x6d, 0x65, 0x6e,
        0x74, 0x73, 0x20, 0x69, 0x6e, 0x20, 0x49, 0x45, 0x54, 0x46, 0x20, 0x73, 0x65, 0x73, 0x73, 0x69,
        0x6f, 0x6e, 0x73, 0x2c, 0x20, 0x61, 0x73, 0x20, 0x77, 0x65, 0x6c, 0x6c, 0x20, 0x61, 0x73, 0x20,
        0x77, 0x72, 0x69, 0x74, 0x74, 0x65, 0x6e, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x65, 0x6c, 0x65, 0x63,
        0x74, 0x72, 0x6f, 0x6e, 0x69, 0x63, 0x20, 0x63, 0x6f, 0x6d, 0x6d, 0x75, 0x6e, 0x69, 0x63, 0x61,
        0x74, 0x69, 0x6f, 0x6e, 0x73, 0x20, 0x6d, 0x61, 0x64, 0x65, 0x20, 0x61, 0x74, 0x20, 0x61, 0x6e,
        0x79, 0x20, 0x74, 0x69, 0x6d, 0x65, 0x20, 0x6f, 0x72, 0x20, 0x70, 0x6c, 0x61, 0x63, 0x65, 0x2c,
        0x20, 0x77, 0x68, 0x69, 0x63, 0x68, 0x20, 0x61, 0x72, 0x65, 0x20, 0x61, 0x64, 0x64, 0x72, 0x65,
        0x73, 0x73, 0x65, 0x64, 0x20, 0x74, 0x6f
    };

    u8 expected_result[16] {
        0x36, 0xe5, 0xf6, 0xb5, 0xc5, 0xe0, 0x60, 0x70, 0xf0, 0xef, 0xca, 0x96, 0x22, 0x7a, 0x86, 0x3e
    };

    Crypto::Authentication::Poly1305 mac(ReadonlyBytes { key, 32 });
    mac.update(ReadonlyBytes { message, 375 });
    auto result = MUST(mac.digest());
    auto expected = ReadonlyBytes { expected_result, 16 };
    EXPECT_EQ(result, expected);
}

TEST_CASE(test_vector_3)
{
    u8 key[32] {
        0x36, 0xe5, 0xf6, 0xb5, 0xc5, 0xe0, 0x60, 0x70, 0xf0, 0xef, 0xca, 0x96, 0x22, 0x7a, 0x86, 0x3e,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    u8 message[375] {
        0x41, 0x6e, 0x79, 0x20, 0x73, 0x75, 0x62, 0x6d, 0x69, 0x73, 0x73, 0x69, 0x6f, 0x6e, 0x20, 0x74,
        0x6f, 0x20, 0x74, 0x68, 0x65, 0x20, 0x49, 0x45, 0x54, 0x46, 0x20, 0x69, 0x6e, 0x74, 0x65, 0x6e,
        0x64, 0x65, 0x64, 0x20, 0x62, 0x79, 0x20, 0x74, 0x68, 0x65, 0x20, 0x43, 0x6f, 0x6e, 0x74, 0x72,
        0x69, 0x62, 0x75, 0x74, 0x6f, 0x72, 0x20, 0x66, 0x6f, 0x72, 0x20, 0x70, 0x75, 0x62, 0x6c, 0x69,
        0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x20, 0x61, 0x73, 0x20, 0x61, 0x6c, 0x6c, 0x20, 0x6f, 0x72,
        0x20, 0x70, 0x61, 0x72, 0x74, 0x20, 0x6f, 0x66, 0x20, 0x61, 0x6e, 0x20, 0x49, 0x45, 0x54, 0x46,
        0x20, 0x49, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2d, 0x44, 0x72, 0x61, 0x66, 0x74, 0x20,
        0x6f, 0x72, 0x20, 0x52, 0x46, 0x43, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x61, 0x6e, 0x79, 0x20, 0x73,
        0x74, 0x61, 0x74, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x20, 0x6d, 0x61, 0x64, 0x65, 0x20, 0x77, 0x69,
        0x74, 0x68, 0x69, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63, 0x6f, 0x6e, 0x74, 0x65, 0x78, 0x74,
        0x20, 0x6f, 0x66, 0x20, 0x61, 0x6e, 0x20, 0x49, 0x45, 0x54, 0x46, 0x20, 0x61, 0x63, 0x74, 0x69,
        0x76, 0x69, 0x74, 0x79, 0x20, 0x69, 0x73, 0x20, 0x63, 0x6f, 0x6e, 0x73, 0x69, 0x64, 0x65, 0x72,
        0x65, 0x64, 0x20, 0x61, 0x6e, 0x20, 0x22, 0x49, 0x45, 0x54, 0x46, 0x20, 0x43, 0x6f, 0x6e, 0x74,
        0x72, 0x69, 0x62, 0x75, 0x74, 0x69, 0x6f, 0x6e, 0x22, 0x2e, 0x20, 0x53, 0x75, 0x63, 0x68, 0x20,
        0x73, 0x74, 0x61, 0x74, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x73, 0x20, 0x69, 0x6e, 0x63, 0x6c, 0x75,
        0x64, 0x65, 0x20, 0x6f, 0x72, 0x61, 0x6c, 0x20, 0x73, 0x74, 0x61, 0x74, 0x65, 0x6d, 0x65, 0x6e,
        0x74, 0x73, 0x20, 0x69, 0x6e, 0x20, 0x49, 0x45, 0x54, 0x46, 0x20, 0x73, 0x65, 0x73, 0x73, 0x69,
        0x6f, 0x6e, 0x73, 0x2c, 0x20, 0x61, 0x73, 0x20, 0x77, 0x65, 0x6c, 0x6c, 0x20, 0x61, 0x73, 0x20,
        0x77, 0x72, 0x69, 0x74, 0x74, 0x65, 0x6e, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x65, 0x6c, 0x65, 0x63,
        0x74, 0x72, 0x6f, 0x6e, 0x69, 0x63, 0x20, 0x63, 0x6f, 0x6d, 0x6d, 0x75, 0x6e, 0x69, 0x63, 0x61,
        0x74, 0x69, 0x6f, 0x6e, 0x73, 0x20, 0x6d, 0x61, 0x64, 0x65, 0x20, 0x61, 0x74, 0x20, 0x61, 0x6e,
        0x79, 0x20, 0x74, 0x69, 0x6d, 0x65, 0x20, 0x6f, 0x72, 0x20, 0x70, 0x6c, 0x61, 0x63, 0x65, 0x2c,
        0x20, 0x77, 0x68, 0x69, 0x63, 0x68, 0x20, 0x61, 0x72, 0x65, 0x20, 0x61, 0x64, 0x64, 0x72, 0x65,
        0x73, 0x73, 0x65, 0x64, 0x20, 0x74, 0x6f
    };

    u8 expected_result[16] {
        0xf3, 0x47, 0x7e, 0x7c, 0xd9, 0x54, 0x17, 0xaf, 0x89, 0xa6, 0xb8, 0x79, 0x4c, 0x31, 0x0c, 0xf0
    };

    Crypto::Authentication::Poly1305 mac(ReadonlyBytes { key, 32 });
    mac.update(ReadonlyBytes { message, 375 });
    auto result = MUST(mac.digest());
    auto expected = ReadonlyBytes { expected_result, 16 };
    EXPECT_EQ(result, expected);
}

TEST_CASE(test_vector_4)
{
    u8 key[32] {
        0x1c, 0x92, 0x40, 0xa5, 0xeb, 0x55, 0xd3, 0x8a, 0xf3, 0x33, 0x88, 0x86, 0x04, 0xf6, 0xb5, 0xf0,
        0x47, 0x39, 0x17, 0xc1, 0x40, 0x2b, 0x80, 0x09, 0x9d, 0xca, 0x5c, 0xbc, 0x20, 0x70, 0x75, 0xc0
    };

    u8 message[127] {
        0x27, 0x54, 0x77, 0x61, 0x73, 0x20, 0x62, 0x72, 0x69, 0x6c, 0x6c, 0x69, 0x67, 0x2c, 0x20, 0x61,
        0x6e, 0x64, 0x20, 0x74, 0x68, 0x65, 0x20, 0x73, 0x6c, 0x69, 0x74, 0x68, 0x79, 0x20, 0x74, 0x6f,
        0x76, 0x65, 0x73, 0x0a, 0x44, 0x69, 0x64, 0x20, 0x67, 0x79, 0x72, 0x65, 0x20, 0x61, 0x6e, 0x64,
        0x20, 0x67, 0x69, 0x6d, 0x62, 0x6c, 0x65, 0x20, 0x69, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x77,
        0x61, 0x62, 0x65, 0x3a, 0x0a, 0x41, 0x6c, 0x6c, 0x20, 0x6d, 0x69, 0x6d, 0x73, 0x79, 0x20, 0x77,
        0x65, 0x72, 0x65, 0x20, 0x74, 0x68, 0x65, 0x20, 0x62, 0x6f, 0x72, 0x6f, 0x67, 0x6f, 0x76, 0x65,
        0x73, 0x2c, 0x0a, 0x41, 0x6e, 0x64, 0x20, 0x74, 0x68, 0x65, 0x20, 0x6d, 0x6f, 0x6d, 0x65, 0x20,
        0x72, 0x61, 0x74, 0x68, 0x73, 0x20, 0x6f, 0x75, 0x74, 0x67, 0x72, 0x61, 0x62, 0x65, 0x2e
    };

    u8 expected_result[16] {
        0x45, 0x41, 0x66, 0x9a, 0x7e, 0xaa, 0xee, 0x61, 0xe7, 0x08, 0xdc, 0x7c, 0xbc, 0xc5, 0xeb, 0x62
    };

    Crypto::Authentication::Poly1305 mac(ReadonlyBytes { key, 32 });
    mac.update(ReadonlyBytes { message, 127 });
    auto result = MUST(mac.digest());
    auto expected = ReadonlyBytes { expected_result, 16 };
    EXPECT_EQ(result, expected);
}

TEST_CASE(test_vector_5)
{
    u8 key[32] {
        0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    u8 message[16] {
        0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
    };

    u8 expected_result[16] {
        0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    Crypto::Authentication::Poly1305 mac(ReadonlyBytes { key, 32 });
    mac.update(ReadonlyBytes { message, 16 });
    auto result = MUST(mac.digest());
    auto expected = ReadonlyBytes { expected_result, 16 };
    EXPECT_EQ(result, expected);
}

TEST_CASE(test_vector_6)
{
    u8 key[32] {
        0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
    };

    u8 message[16] {
        0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    u8 expected_result[16] {
        0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    Crypto::Authentication::Poly1305 mac(ReadonlyBytes { key, 32 });
    mac.update(ReadonlyBytes { message, 16 });
    auto result = MUST(mac.digest());
    auto expected = ReadonlyBytes { expected_result, 16 };
    EXPECT_EQ(result, expected);
}

TEST_CASE(test_vector_7)
{
    u8 key[32] {
        0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    u8 message[48] {
        0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
        0xF0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
        0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    u8 expected_result[16] {
        0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    Crypto::Authentication::Poly1305 mac(ReadonlyBytes { key, 32 });
    mac.update(ReadonlyBytes { message, 48 });
    auto result = MUST(mac.digest());
    auto expected = ReadonlyBytes { expected_result, 16 };
    EXPECT_EQ(result, expected);
}

TEST_CASE(test_vector_8)
{
    u8 key[32] {
        0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    u8 message[48] {
        0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
        0xFB, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
        0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01
    };

    u8 expected_result[16] {
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    Crypto::Authentication::Poly1305 mac(ReadonlyBytes { key, 32 });
    mac.update(ReadonlyBytes { message, 48 });
    auto result = MUST(mac.digest());
    auto expected = ReadonlyBytes { expected_result, 16 };
    EXPECT_EQ(result, expected);
}

TEST_CASE(test_vector_9)
{
    u8 key[32] {
        0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    u8 message[16] {
        0xFD, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
    };

    u8 expected_result[16] {
        0xFA, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
    };

    Crypto::Authentication::Poly1305 mac(ReadonlyBytes { key, 32 });
    mac.update(ReadonlyBytes { message, 16 });
    auto result = MUST(mac.digest());
    auto expected = ReadonlyBytes { expected_result, 16 };
    EXPECT_EQ(result, expected);
}

TEST_CASE(test_vector_10)
{
    u8 key[32] {
        0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    u8 message[64] {
        0xE3, 0x35, 0x94, 0xD7, 0x50, 0x5E, 0x43, 0xB9, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x33, 0x94, 0xD7, 0x50, 0x5E, 0x43, 0x79, 0xCD, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    u8 expected_result[16] {
        0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    Crypto::Authentication::Poly1305 mac(ReadonlyBytes { key, 32 });
    mac.update(ReadonlyBytes { message, 64 });
    auto result = MUST(mac.digest());
    auto expected = ReadonlyBytes { expected_result, 16 };
    EXPECT_EQ(result, expected);
}

TEST_CASE(test_vector_11)
{
    u8 key[32] {
        0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    u8 message[48] {
        0xE3, 0x35, 0x94, 0xD7, 0x50, 0x5E, 0x43, 0xB9, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x33, 0x94, 0xD7, 0x50, 0x5E, 0x43, 0x79, 0xCD, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    u8 expected_result[16] {
        0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    Crypto::Authentication::Poly1305 mac(ReadonlyBytes { key, 32 });
    mac.update(ReadonlyBytes { message, 48 });
    auto result = MUST(mac.digest());
    auto expected = ReadonlyBytes { expected_result, 16 };
    EXPECT_EQ(result, expected);
}