Method TestChaCha20Poly1305

src/test/crypto_tests.cpp:255–294

}

void TestChaCha20Poly1305(const std::string& plain_hex, const std::string& aad_hex, const std::string& key_hex, ChaCha20::Nonce96 nonce, const std::string& cipher_hex)
{
    auto plain = ParseHex<std::byte>(plain_hex);
    auto aad = ParseHex<std::byte>(aad_hex);
    auto key = ParseHex<std::byte>(key_hex);
    auto expected_cipher = ParseHex<std::byte>(cipher_hex);

    for (int i = 0; i < 10; ++i) {
        // During i=0, use single-plain Encrypt/Decrypt; others use a split at prefix.
        size_t prefix = i ? m_rng.randrange(plain.size() + 1) : plain.size();
        // Encrypt.
        std::vector<std::byte> cipher(plain.size() + AEADChaCha20Poly1305::EXPANSION);
        AEADChaCha20Poly1305 aead{key};
        if (i == 0) {
            aead.Encrypt(plain, aad, nonce, cipher);
        } else {
            aead.Encrypt(std::span{plain}.first(prefix), std::span{plain}.subspan(prefix), aad, nonce, cipher);
        }
        BOOST_CHECK(cipher == expected_cipher);

        // Decrypt.
        std::vector<std::byte> decipher(cipher.size() - AEADChaCha20Poly1305::EXPANSION);
        bool ret{false};
        if (i == 0) {
            ret = aead.Decrypt(cipher, aad, nonce, decipher);
        } else {
            ret = aead.Decrypt(cipher, aad, nonce, std::span{decipher}.first(prefix), std::span{decipher}.subspan(prefix));
        }
        BOOST_CHECK(ret);
        BOOST_CHECK(decipher == plain);
    }

    // Test Keystream output.
    std::vector<std::byte> keystream(plain.size());
    AEADChaCha20Poly1305 aead{key};
    aead.Keystream(nonce, keystream);
    for (size_t i = 0; i < plain.size(); ++i) {
        BOOST_CHECK_EQUAL(plain[i] ^ keystream[i], expected_cipher[i]);
    }
}

void TestFSChaCha20Poly1305(const std::string& plain_hex, const std::string& aad_hex, const std::string& key_hex, uint64_t msg_idx, const std::string& cipher_hex)
{