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Merge pull request #8551

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eca7f6a Fix segfault restoring encrypted multisig seed (j-berman)
f713c3c Require user ack multisig is experimental to restore (j-berman)
564a7a3 multisig: fix #8537 seed restore (suggestions by @UkoeHB) (j-berman)
This commit is contained in:
luigi1111 2022-09-15 00:34:05 -05:00
commit df37c148d4
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GPG Key ID: F4ACA0183641E010
8 changed files with 56 additions and 28 deletions
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9
src/multisig/multisig_account.cpp
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@ -127,7 +127,7 @@ namespace multisig
bool multisig_account::multisig_is_ready() const
{
if (main_kex_rounds_done())
return m_kex_rounds_complete >= multisig_kex_rounds_required(m_signers.size(), m_threshold) + 1;
return m_kex_rounds_complete >= multisig_setup_rounds_required(m_signers.size(), m_threshold);
else
return false;
}
@ -200,4 +200,11 @@ namespace multisig
return num_signers - threshold + 1;
}
//----------------------------------------------------------------------------------------------------------------------
// EXTERNAL
//----------------------------------------------------------------------------------------------------------------------
std::uint32_t multisig_setup_rounds_required(const std::uint32_t num_signers, const std::uint32_t threshold)
{
return multisig_kex_rounds_required(num_signers, threshold) + 1;
}
//----------------------------------------------------------------------------------------------------------------------
} //namespace multisig

9
src/multisig/multisig_account.h
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@ -245,4 +245,13 @@ namespace multisig
* return: number of kex rounds required
*/
std::uint32_t multisig_kex_rounds_required(const std::uint32_t num_signers, const std::uint32_t threshold);
/**
* brief: multisig_setup_rounds_required - The number of setup rounds required to produce an M-of-N shared key.
* - A participant must complete all kex rounds and 1 initialization round.
* param: num_signers - number of participants in multisig (N)
* param: threshold - threshold of multisig (M)
* return: number of setup rounds required
*/
std::uint32_t multisig_setup_rounds_required(const std::uint32_t num_signers, const std::uint32_t threshold);
} //namespace multisig

2
src/multisig/multisig_account_kex_impl.cpp
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@ -74,7 +74,7 @@ namespace multisig
"Multisig threshold may not be larger than number of signers.");
CHECK_AND_ASSERT_THROW_MES(threshold > 0, "Multisig threshold must be > 0.");
CHECK_AND_ASSERT_THROW_MES(round > 0, "Multisig kex round must be > 0.");
CHECK_AND_ASSERT_THROW_MES(round <= multisig_kex_rounds_required(num_signers, threshold) + 1,
CHECK_AND_ASSERT_THROW_MES(round <= multisig_setup_rounds_required(num_signers, threshold),
"Trying to process multisig kex for an invalid round.");
}
//----------------------------------------------------------------------------------------------------------------------

45
src/simplewallet/simplewallet.cpp
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@ -4118,6 +4118,7 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
epee::wipeable_string multisig_keys;
epee::wipeable_string password;
epee::wipeable_string seed_pass;
if (!handle_command_line(vm))
return false;
@ -4134,6 +4135,17 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
if(!ask_wallet_create_if_needed()) return false;
}
bool enable_multisig = false;
if (m_restore_multisig_wallet) {
fail_msg_writer() << tr("Multisig is disabled.");
fail_msg_writer() << tr("Multisig is an experimental feature and may have bugs. Things that could go wrong include: funds sent to a multisig wallet can't be spent at all, can only be spent with the participation of a malicious group member, or can be stolen by a malicious group member.");
if (!command_line::is_yes(input_line("Do you want to continue restoring a multisig wallet?", true))) {
message_writer() << tr("You have canceled restoring a multisig wallet.");
return false;
}
enable_multisig = true;
}
if (!m_generate_new.empty() || m_restoring)
{
if (!m_subaddress_lookahead.empty() && !parse_subaddress_lookahead(m_subaddress_lookahead))
@ -4213,19 +4225,9 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
auto pwd_container = password_prompter(tr("Enter seed offset passphrase, empty if none"), false);
if (std::cin.eof() || !pwd_container)
return false;
epee::wipeable_string seed_pass = pwd_container->password();
if (!seed_pass.empty())
{
if (m_restore_multisig_wallet)
{
crypto::secret_key key;
crypto::cn_slow_hash(seed_pass.data(), seed_pass.size(), (crypto::hash&)key);
sc_reduce32((unsigned char*)key.data);
multisig_keys = m_wallet->decrypt<epee::wipeable_string>(std::string(multisig_keys.data(), multisig_keys.size()), key, true);
}
else
m_recovery_key = cryptonote::decrypt_key(m_recovery_key, seed_pass);
}
seed_pass = pwd_container->password();
if (!seed_pass.empty() && !m_restore_multisig_wallet)
m_recovery_key = cryptonote::decrypt_key(m_recovery_key, seed_pass);
}
if (!m_generate_from_view_key.empty())
{
@ -4568,7 +4570,7 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
m_wallet_file = m_generate_new;
boost::optional<epee::wipeable_string> r;
if (m_restore_multisig_wallet)
r = new_wallet(vm, multisig_keys, old_language);
r = new_wallet(vm, multisig_keys, seed_pass, old_language);
else
r = new_wallet(vm, m_recovery_key, m_restore_deterministic_wallet, m_non_deterministic, old_language);
CHECK_AND_ASSERT_MES(r, false, tr("account creation failed"));
@ -4667,6 +4669,8 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
}
m_wallet->set_refresh_from_block_height(m_restore_height);
}
if (enable_multisig)
m_wallet->enable_multisig(true);
m_wallet->rewrite(m_wallet_file, password);
}
else
@ -5057,7 +5061,7 @@ boost::optional<epee::wipeable_string> simple_wallet::new_wallet(const boost::pr
}
//----------------------------------------------------------------------------------------------------
boost::optional<epee::wipeable_string> simple_wallet::new_wallet(const boost::program_options::variables_map& vm,
const epee::wipeable_string &multisig_keys, const std::string &old_language)
const epee::wipeable_string &multisig_keys, const epee::wipeable_string &seed_pass, const std::string &old_language)
{
std::pair<std::unique_ptr<tools::wallet2>, tools::password_container> rc;
try { rc = tools::wallet2::make_new(vm, false, password_prompter); }
@ -5091,7 +5095,16 @@ boost::optional<epee::wipeable_string> simple_wallet::new_wallet(const boost::pr
try
{
m_wallet->generate(m_wallet_file, std::move(rc.second).password(), multisig_keys, create_address_file);
if (seed_pass.empty())
m_wallet->generate(m_wallet_file, std::move(rc.second).password(), multisig_keys, create_address_file);
else
{
crypto::secret_key key;
crypto::cn_slow_hash(seed_pass.data(), seed_pass.size(), (crypto::hash&)key);
sc_reduce32((unsigned char*)key.data);
const epee::wipeable_string &msig_keys = m_wallet->decrypt<epee::wipeable_string>(std::string(multisig_keys.data(), multisig_keys.size()), key, true);
m_wallet->generate(m_wallet_file, std::move(rc.second).password(), msig_keys, create_address_file);
}
bool ready;
uint32_t threshold, total;
if (!m_wallet->multisig(&ready, &threshold, &total) || !ready)

2
src/simplewallet/simplewallet.h
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@ -101,7 +101,7 @@ namespace cryptonote
boost::optional<epee::wipeable_string> new_wallet(const boost::program_options::variables_map& vm, const cryptonote::account_public_address& address,
const boost::optional<crypto::secret_key>& spendkey, const crypto::secret_key& viewkey);
boost::optional<epee::wipeable_string> new_wallet(const boost::program_options::variables_map& vm,
const epee::wipeable_string &multisig_keys, const std::string &old_language);
const epee::wipeable_string &multisig_keys, const epee::wipeable_string &seed_pass, const std::string &old_language);
boost::optional<epee::wipeable_string> new_wallet(const boost::program_options::variables_map& vm);
boost::optional<epee::wipeable_string> open_wallet(const boost::program_options::variables_map& vm);
bool close_wallet();

12
src/wallet/wallet2.cpp
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@ -4691,7 +4691,8 @@ void wallet2::init_type(hw::device::device_type device_type)
}
/*!
* \brief Generates a wallet or restores one.
* \brief Generates a wallet or restores one. Assumes the multisig setup
* has already completed for the provided multisig info.
* \param wallet_ Name of wallet file
* \param password Password of wallet file
* \param multisig_data The multisig restore info and keys
@ -4750,11 +4751,6 @@ void wallet2::generate(const std::string& wallet_, const epee::wipeable_string&
crypto::public_key local_signer;
THROW_WALLET_EXCEPTION_IF(!crypto::secret_key_to_public_key(spend_secret_key, local_signer), error::invalid_multisig_seed);
THROW_WALLET_EXCEPTION_IF(std::find(multisig_signers.begin(), multisig_signers.end(), local_signer) == multisig_signers.end(), error::invalid_multisig_seed);
rct::key skey = rct::zero();
for (const auto &msk: multisig_keys)
sc_add(skey.bytes, skey.bytes, rct::sk2rct(msk).bytes);
THROW_WALLET_EXCEPTION_IF(!(rct::rct2sk(skey) == spend_secret_key), error::invalid_multisig_seed);
memwipe(&skey, sizeof(rct::key));
m_account.make_multisig(view_secret_key, spend_secret_key, spend_public_key, multisig_keys);
@ -4765,6 +4761,8 @@ void wallet2::generate(const std::string& wallet_, const epee::wipeable_string&
m_multisig = true;
m_multisig_threshold = threshold;
m_multisig_signers = multisig_signers;
// wallet is assumed already finalized
m_multisig_rounds_passed = multisig::multisig_setup_rounds_required(m_multisig_signers.size(), m_multisig_threshold);
setup_keys(password);
create_keys_file(wallet_, false, password, m_nettype != MAINNET || create_address_file);
@ -5215,7 +5213,7 @@ bool wallet2::multisig(bool *ready, uint32_t *threshold, uint32_t *total) const
if (ready)
{
*ready = !(get_account().get_keys().m_account_address.m_spend_public_key == rct::rct2pk(rct::identity())) &&
(m_multisig_rounds_passed == multisig::multisig_kex_rounds_required(m_multisig_signers.size(), m_multisig_threshold) + 1);
(m_multisig_rounds_passed == multisig::multisig_setup_rounds_required(m_multisig_signers.size(), m_multisig_threshold));
}
return true;
}

3
src/wallet/wallet2.h
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@ -817,7 +817,8 @@ private:
};
/*!
* \brief Generates a wallet or restores one.
* \brief Generates a wallet or restores one. Assumes the multisig setup
* has already completed for the provided multisig info.
* \param wallet_ Name of wallet file
* \param password Password of wallet file
* \param multisig_data The multisig restore info and keys

2
tests/unit_tests/multisig.cpp
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@ -171,7 +171,7 @@ static void make_wallets(std::vector<tools::wallet2>& wallets, unsigned int M)
{
ASSERT_TRUE(wallets.size() > 1 && wallets.size() <= KEYS_COUNT);
ASSERT_TRUE(M <= wallets.size());
std::uint32_t total_rounds_required = multisig::multisig_kex_rounds_required(wallets.size(), M) + 1;
std::uint32_t total_rounds_required = multisig::multisig_setup_rounds_required(wallets.size(), M);
std::uint32_t rounds_complete{0};
// initialize wallets, get first round multisig kex msgs