f5f4109f9a
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.
169 lines
6.6 KiB
C++
169 lines
6.6 KiB
C++
// Copyright (c) 2014-2016, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "gtest/gtest.h"
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#include "mnemonics/electrum-words.h"
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#include "crypto/crypto.h"
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#include <stdlib.h>
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#include <vector>
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#include <time.h>
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#include <iostream>
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#include <boost/algorithm/string.hpp>
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#include "mnemonics/english.h"
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#include "mnemonics/spanish.h"
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#include "mnemonics/portuguese.h"
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#include "mnemonics/japanese.h"
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#include "mnemonics/old_english.h"
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#include "mnemonics/language_base.h"
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#include "mnemonics/singleton.h"
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namespace
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{
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/*!
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* \brief Compares vectors for equality
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* \param expected expected vector
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* \param present current vector
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*/
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void compare_vectors(const std::vector<std::string> &expected, const std::vector<std::string> &present)
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{
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std::vector<std::string>::const_iterator it1, it2;
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for (it1 = expected.begin(), it2 = present.begin(); it1 != expected.end() && it2 != present.end();
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it1++, it2++)
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{
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ASSERT_STREQ(it1->c_str(), it2->c_str());
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}
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}
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/*!
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* \brief Tests the given language mnemonics.
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* \param language A Language instance to test
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*/
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void test_language(const Language::Base &language)
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{
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const std::vector<std::string> &word_list = language.get_word_list();
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std::string seed = "", return_seed = "";
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// Generate a random seed without checksum
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crypto::secret_key randkey;
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for (size_t ii = 0; ii < sizeof(randkey); ++ii)
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{
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randkey.data[ii] = rand();
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}
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crypto::ElectrumWords::bytes_to_words(randkey, seed, language.get_language_name());
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// remove the checksum word
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const char *space = strrchr(seed.c_str(), ' ');
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ASSERT_TRUE(space != NULL);
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seed = std::string(seed.c_str(), space-seed.c_str());
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std::cout << "Test seed without checksum:\n";
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std::cout << seed << std::endl;
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crypto::secret_key key;
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std::string language_name;
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bool res;
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std::vector<std::string> seed_vector, return_seed_vector;
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std::string checksum_word;
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// Convert it to secret key
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res = crypto::ElectrumWords::words_to_bytes(seed, key, language_name);
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ASSERT_EQ(true, res);
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std::cout << "Detected language: " << language_name << std::endl;
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ASSERT_STREQ(language.get_language_name().c_str(), language_name.c_str());
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// Convert the secret key back to seed
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crypto::ElectrumWords::bytes_to_words(key, return_seed, language.get_language_name());
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ASSERT_EQ(true, res);
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std::cout << "Returned seed:\n";
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std::cout << return_seed << std::endl;
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boost::split(seed_vector, seed, boost::is_any_of(" "));
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boost::split(return_seed_vector, return_seed, boost::is_any_of(" "));
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// Extract the checksum word
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checksum_word = return_seed_vector.back();
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return_seed_vector.pop_back();
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ASSERT_EQ(seed_vector.size(), return_seed_vector.size());
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// Ensure that the rest of it is same
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compare_vectors(seed_vector, return_seed_vector);
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// Append the checksum word to repeat the entire process with a seed with checksum
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seed += (" " + checksum_word);
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std::cout << "Test seed with checksum:\n";
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std::cout << seed << std::endl;
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res = crypto::ElectrumWords::words_to_bytes(seed, key, language_name);
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ASSERT_EQ(true, res);
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std::cout << "Detected language: " << language_name << std::endl;
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ASSERT_STREQ(language.get_language_name().c_str(), language_name.c_str());
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return_seed = "";
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crypto::ElectrumWords::bytes_to_words(key, return_seed, language.get_language_name());
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ASSERT_EQ(true, res);
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std::cout << "Returned seed:\n";
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std::cout << return_seed << std::endl;
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seed_vector.clear();
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return_seed_vector.clear();
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boost::split(seed_vector, seed, boost::is_any_of(" "));
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boost::split(return_seed_vector, return_seed, boost::is_any_of(" "));
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ASSERT_EQ(seed_vector.size(), return_seed_vector.size());
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compare_vectors(seed_vector, return_seed_vector);
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}
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}
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TEST(mnemonics, all_languages)
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{
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srand(time(NULL));
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std::vector<Language::Base*> languages({
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Language::Singleton<Language::English>::instance(),
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Language::Singleton<Language::Spanish>::instance(),
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Language::Singleton<Language::Portuguese>::instance(),
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Language::Singleton<Language::Japanese>::instance(),
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});
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for (std::vector<Language::Base*>::iterator it = languages.begin(); it != languages.end(); it++)
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{
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test_language(*(*it));
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}
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}
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TEST(mnemonics, language_detection_with_bad_checksum)
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{
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crypto::secret_key key;
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std::string language_name;
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bool res;
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// This Portuguese (4-prefix) seed has all its words with 3-prefix that's also present in English
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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";
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const std::string real_checksum = "gnostico";
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res = crypto::ElectrumWords::words_to_bytes(base_seed, key, language_name);
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ASSERT_EQ(true, res);
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ASSERT_STREQ(language_name.c_str(), "Portuguese");
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res = crypto::ElectrumWords::words_to_bytes(base_seed + " " + real_checksum, key, language_name);
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ASSERT_EQ(true, res);
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ASSERT_STREQ(language_name.c_str(), "Portuguese");
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}
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