wownero/tests/unit_tests/mnemonics.cpp
moneromooo-monero f5f4109f9a
mnemonics: fix language detection with checksum word
If a checksum word is present, language detection would use
just the word prefixes. However, a set of word prefixes may
be found in more than one language, and so the wrong language
may be found first, which could then fail the checksum, since
the check may be done with a different unique prefix length
from the one it was created from.

We now make a checksum test when we we detect a language from
prefixes only, to make sure we have the correct one.
2017-01-15 11:16:25 +00:00

169 lines
6.6 KiB
C++

// Copyright (c) 2014-2016, The Monero Project
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#include "gtest/gtest.h"
#include "mnemonics/electrum-words.h"
#include "crypto/crypto.h"
#include <stdlib.h>
#include <vector>
#include <time.h>
#include <iostream>
#include <boost/algorithm/string.hpp>
#include "mnemonics/english.h"
#include "mnemonics/spanish.h"
#include "mnemonics/portuguese.h"
#include "mnemonics/japanese.h"
#include "mnemonics/old_english.h"
#include "mnemonics/language_base.h"
#include "mnemonics/singleton.h"
namespace
{
/*!
* \brief Compares vectors for equality
* \param expected expected vector
* \param present current vector
*/
void compare_vectors(const std::vector<std::string> &expected, const std::vector<std::string> &present)
{
std::vector<std::string>::const_iterator it1, it2;
for (it1 = expected.begin(), it2 = present.begin(); it1 != expected.end() && it2 != present.end();
it1++, it2++)
{
ASSERT_STREQ(it1->c_str(), it2->c_str());
}
}
/*!
* \brief Tests the given language mnemonics.
* \param language A Language instance to test
*/
void test_language(const Language::Base &language)
{
const std::vector<std::string> &word_list = language.get_word_list();
std::string seed = "", return_seed = "";
// Generate a random seed without checksum
crypto::secret_key randkey;
for (size_t ii = 0; ii < sizeof(randkey); ++ii)
{
randkey.data[ii] = rand();
}
crypto::ElectrumWords::bytes_to_words(randkey, seed, language.get_language_name());
// remove the checksum word
const char *space = strrchr(seed.c_str(), ' ');
ASSERT_TRUE(space != NULL);
seed = std::string(seed.c_str(), space-seed.c_str());
std::cout << "Test seed without checksum:\n";
std::cout << seed << std::endl;
crypto::secret_key key;
std::string language_name;
bool res;
std::vector<std::string> seed_vector, return_seed_vector;
std::string checksum_word;
// Convert it to secret key
res = crypto::ElectrumWords::words_to_bytes(seed, key, language_name);
ASSERT_EQ(true, res);
std::cout << "Detected language: " << language_name << std::endl;
ASSERT_STREQ(language.get_language_name().c_str(), language_name.c_str());
// Convert the secret key back to seed
crypto::ElectrumWords::bytes_to_words(key, return_seed, language.get_language_name());
ASSERT_EQ(true, res);
std::cout << "Returned seed:\n";
std::cout << return_seed << std::endl;
boost::split(seed_vector, seed, boost::is_any_of(" "));
boost::split(return_seed_vector, return_seed, boost::is_any_of(" "));
// Extract the checksum word
checksum_word = return_seed_vector.back();
return_seed_vector.pop_back();
ASSERT_EQ(seed_vector.size(), return_seed_vector.size());
// Ensure that the rest of it is same
compare_vectors(seed_vector, return_seed_vector);
// Append the checksum word to repeat the entire process with a seed with checksum
seed += (" " + checksum_word);
std::cout << "Test seed with checksum:\n";
std::cout << seed << std::endl;
res = crypto::ElectrumWords::words_to_bytes(seed, key, language_name);
ASSERT_EQ(true, res);
std::cout << "Detected language: " << language_name << std::endl;
ASSERT_STREQ(language.get_language_name().c_str(), language_name.c_str());
return_seed = "";
crypto::ElectrumWords::bytes_to_words(key, return_seed, language.get_language_name());
ASSERT_EQ(true, res);
std::cout << "Returned seed:\n";
std::cout << return_seed << std::endl;
seed_vector.clear();
return_seed_vector.clear();
boost::split(seed_vector, seed, boost::is_any_of(" "));
boost::split(return_seed_vector, return_seed, boost::is_any_of(" "));
ASSERT_EQ(seed_vector.size(), return_seed_vector.size());
compare_vectors(seed_vector, return_seed_vector);
}
}
TEST(mnemonics, all_languages)
{
srand(time(NULL));
std::vector<Language::Base*> languages({
Language::Singleton<Language::English>::instance(),
Language::Singleton<Language::Spanish>::instance(),
Language::Singleton<Language::Portuguese>::instance(),
Language::Singleton<Language::Japanese>::instance(),
});
for (std::vector<Language::Base*>::iterator it = languages.begin(); it != languages.end(); it++)
{
test_language(*(*it));
}
}
TEST(mnemonics, language_detection_with_bad_checksum)
{
crypto::secret_key key;
std::string language_name;
bool res;
// This Portuguese (4-prefix) seed has all its words with 3-prefix that's also present in English
const std::string base_seed = "cinzento luxuriante leonardo gnostico digressao cupula fifa broxar iniquo louvor ovario dorsal ideologo besuntar decurso rosto susto lemure unheiro pagodeiro nitroglicerina eclusa mazurca bigorna";
const std::string real_checksum = "gnostico";
res = crypto::ElectrumWords::words_to_bytes(base_seed, key, language_name);
ASSERT_EQ(true, res);
ASSERT_STREQ(language_name.c_str(), "Portuguese");
res = crypto::ElectrumWords::words_to_bytes(base_seed + " " + real_checksum, key, language_name);
ASSERT_EQ(true, res);
ASSERT_STREQ(language_name.c_str(), "Portuguese");
}