From c4344800eb57ce0d6804234c051355d6ea2569ef Mon Sep 17 00:00:00 2001 From: moneromooo-monero Date: Thu, 3 Sep 2015 15:32:35 +0100 Subject: [PATCH] unit_tests: fix mnemonics unit test testing invalid seeds Some word triplets, such as "mugged names nail", are not valid results from any 32 bit value. If used to decode a 32 bit value, the result will therefore encode to a different word triplet. Fix this by using random words converted from an actual random bitstring, ensuring we always get valid triplets. --- tests/unit_tests/mnemonics.cpp | 22 +++++++++------------- 1 file changed, 9 insertions(+), 13 deletions(-) diff --git a/tests/unit_tests/mnemonics.cpp b/tests/unit_tests/mnemonics.cpp index d2b1edaa9..85234f1b7 100644 --- a/tests/unit_tests/mnemonics.cpp +++ b/tests/unit_tests/mnemonics.cpp @@ -44,16 +44,6 @@ namespace { - /*! - * \brief Returns random index from 0 to max-1 - * \param max Range maximum - * \return required random index - */ - uint32_t get_random_index(int max) - { - return rand() % max; - } - /*! * \brief Compares vectors for equality * \param expected expected vector @@ -78,11 +68,17 @@ namespace const std::vector &word_list = language.get_word_list(); std::string seed = "", return_seed = ""; // Generate a random seed without checksum - for (int ii = 0; ii < crypto::ElectrumWords::seed_length; ii++) + crypto::secret_key randkey; + for (size_t ii = 0; ii < sizeof(randkey); ++ii) { - seed += (word_list[get_random_index(word_list.size())] + ' '); + randkey.data[ii] = rand(); } - seed.pop_back(); + 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;