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unit_tests: fix mnemonics unit test testing invalid seeds

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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.
This commit is contained in:
moneromooo-monero 2015-09-03 15:32:35 +01:00
parent 5feebb4d87
commit 098dcf2885
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1 changed files with 9 additions and 13 deletions
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22
tests/unit_tests/mnemonics.cpp
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@ -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<std::string> &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;