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/*
* (C) 2014,2015 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "tests.h"
#if defined(BOTAN_HAS_BLOCK_CIPHER)
#include <botan/block_cipher.h>
namespace Botan_Tests {
class Block_Cipher_Tests final : public Text_Based_Test
{
public:
Block_Cipher_Tests() : Text_Based_Test("block", "Key,In,Out", "Tweak,Iterations") {}
std::vector<std::string> possible_providers(const std::string& algo) override
{
return provider_filter(Botan::BlockCipher::providers(algo));
}
Test::Result run_one_test(const std::string& algo, const VarMap& vars) override
{
const std::vector<uint8_t> key = vars.get_req_bin("Key");
const std::vector<uint8_t> input = vars.get_req_bin("In");
const std::vector<uint8_t> expected = vars.get_req_bin("Out");
const std::vector<uint8_t> tweak = vars.get_opt_bin("Tweak");
const size_t iterations = vars.get_opt_sz("Iterations", 1);
Test::Result result(algo);
const std::vector<std::string> providers = possible_providers(algo);
if(providers.empty())
{
result.note_missing("block cipher " + algo);
return result;
}
for(auto const& provider_ask : providers)
{
std::unique_ptr<Botan::BlockCipher> cipher(Botan::BlockCipher::create(algo, provider_ask));
if(!cipher)
{
result.test_failure("Cipher " + algo + " supported by " + provider_ask + " but not found");
continue;
}
const std::string provider(cipher->provider());
result.test_is_nonempty("provider", provider);
result.test_eq(provider, cipher->name(), algo);
result.test_gte(provider, cipher->parallelism(), 1);
result.test_gte(provider, cipher->block_size(), 8);
result.test_gte(provider, cipher->parallel_bytes(), cipher->block_size() * cipher->parallelism());
// Test that trying to encrypt or decrypt with now key set throws Botan::Invalid_State
try
{
std::vector<uint8_t> block(cipher->block_size());
cipher->encrypt(block);
result.test_failure("Was able to encrypt without a key being set");
}
catch(Botan::Invalid_State&)
{
result.test_success("Trying to encrypt with no key set fails");
}
try
{
std::vector<uint8_t> block(cipher->block_size());
cipher->decrypt(block);
result.test_failure("Was able to decrypt without a key being set");
}
catch(Botan::Invalid_State&)
{
result.test_success("Trying to encrypt with no key set fails");
}
// Test to make sure clear() resets what we need it to
cipher->set_key(Test::rng().random_vec(cipher->key_spec().maximum_keylength()));
Botan::secure_vector<uint8_t> garbage = Test::rng().random_vec(cipher->block_size());
cipher->encrypt(garbage);
cipher->clear();
/*
* Different providers may have additional restrictions on key sizes.
* Avoid testing the cipher with a key size that it does not natively support.
*/
if(!cipher->valid_keylength(key.size()))
{
result.test_note("Skipping test with provider " + provider +
" as it does not support key length " + std::to_string(key.size()));
continue;
}
cipher->set_key(key);
if(tweak.size() > 0)
{
Botan::Tweakable_Block_Cipher* tbc = dynamic_cast<Botan::Tweakable_Block_Cipher*>(cipher.get());
if(tbc == nullptr)
result.test_failure("Tweak set in test data but cipher is not a Tweakable_Block_Cipher");
else
tbc->set_tweak(tweak.data(), tweak.size());
}
// Test that clone works and does not affect parent object
std::unique_ptr<Botan::BlockCipher> clone(cipher->clone());
result.confirm("Clone has different pointer", cipher.get() != clone.get());
result.test_eq("Clone has same name", cipher->name(), clone->name());
clone->set_key(Test::rng().random_vec(cipher->maximum_keylength()));
// have called set_key on clone: process input values
std::vector<uint8_t> buf = input;
for(size_t i = 0; i != iterations; ++i)
{
cipher->encrypt(buf);
}
result.test_eq(provider, "encrypt", buf, expected);
// always decrypt expected ciphertext vs what we produced above
buf = expected;
for(size_t i = 0; i != iterations; ++i)
{
cipher->decrypt(buf);
}
result.test_eq(provider, "decrypt", buf, input);
// Now test misaligned buffers
const size_t blocks = input.size() / cipher->block_size();
buf.resize(input.size() + 1);
std::memcpy(buf.data() + 1, input.data(), input.size());
for(size_t i = 0; i != iterations; ++i)
{
cipher->encrypt_n(buf.data() + 1, buf.data() + 1, blocks);
}
result.test_eq(provider.c_str(), "encrypt misaligned",
buf.data() + 1, buf.size() - 1,
expected.data(), expected.size());
// always decrypt expected ciphertext vs what we produced above
std::memcpy(buf.data() + 1, expected.data(), expected.size());
for(size_t i = 0; i != iterations; ++i)
{
cipher->decrypt_n(buf.data() + 1, buf.data() + 1, blocks);
}
result.test_eq(provider.c_str(), "decrypt misaligned",
buf.data() + 1, buf.size() - 1,
input.data(), input.size());
cipher->clear();
try
{
std::vector<uint8_t> block(cipher->block_size());
cipher->encrypt(block);
result.test_failure("Was able to encrypt without a key being set");
}
catch(Botan::Invalid_State&)
{
result.test_success("Trying to encrypt with no key set (after clear) fails");
}
try
{
std::vector<uint8_t> block(cipher->block_size());
cipher->decrypt(block);
result.test_failure("Was able to decrypt without a key being set");
}
catch(Botan::Invalid_State&)
{
result.test_success("Trying to decrypt with no key set (after clear) fails");
}
}
return result;
}
};
BOTAN_REGISTER_TEST("block", Block_Cipher_Tests);
}
#endif
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