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change the N-1/N multisig second message signer for auth

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moneromooo-monero committed Nov 29, 2017
1 parent 55c2845 commit ceabc4f92b8b3a5c3426e4257654608cdb54797a
Showing with 9 additions and 10 deletions.
  1. +9 −10 src/wallet/wallet2.cpp
@@ -2832,7 +2832,8 @@ std::string wallet2::make_multisig(const epee::wipeable_string &password,
// We need an extra step, so we package all the composite public keys
// we know about, and make a signed string out of them
std::string data;
const crypto::public_key signer = get_multisig_signer_public_key(rct::rct2sk(spend_skey));
crypto::public_key signer;
CHECK_AND_ASSERT_THROW_MES(crypto::secret_key_to_public_key(rct::rct2sk(spend_skey), signer), "Failed to derive public spend key");
data += std::string((const char *)&signer, sizeof(crypto::public_key));

for (const auto &msk: multisig_keys)
@@ -2844,7 +2845,7 @@ std::string wallet2::make_multisig(const epee::wipeable_string &password,
data.resize(data.size() + sizeof(crypto::signature));
crypto::cn_fast_hash(data.data(), data.size() - sizeof(signature), hash);
crypto::signature &signature = *(crypto::signature*)&data[data.size() - sizeof(crypto::signature)];
crypto::generate_signature(hash, signer, get_multisig_blinded_secret_key(rct::rct2sk(spend_skey)), signature);
crypto::generate_signature(hash, signer, rct::rct2sk(spend_skey), signature);

extra_multisig_info = std::string("MultisigxV1") + tools::base58::encode(data);
}
@@ -2954,7 +2955,9 @@ bool wallet2::finalize_multisig(const epee::wipeable_string &password, std::unor
CHECK_AND_ASSERT_THROW_MES(!pkeys.empty(), "empty pkeys");

// add ours if not included
const crypto::public_key local_signer = get_multisig_signer_public_key();
crypto::public_key local_signer;
CHECK_AND_ASSERT_THROW_MES(crypto::secret_key_to_public_key(get_account().get_keys().m_spend_secret_key, local_signer),
"Failed to derive public spend key");
if (std::find(signers.begin(), signers.end(), local_signer) == signers.end())
{
signers.push_back(local_signer);
@@ -8381,13 +8384,9 @@ crypto::public_key wallet2::get_multisig_signer_public_key(const crypto::secret_
crypto::public_key wallet2::get_multisig_signer_public_key() const
{
CHECK_AND_ASSERT_THROW_MES(m_multisig, "Wallet is not multisig");
if (m_multisig_threshold == m_multisig_signers.size())
{
crypto::public_key signer;
CHECK_AND_ASSERT_THROW_MES(crypto::secret_key_to_public_key(get_account().get_keys().m_spend_secret_key, signer), "Failed to generate signer public key");
return signer;
}
return get_multisig_signer_public_key(get_account().get_keys().m_spend_secret_key);
crypto::public_key signer;
CHECK_AND_ASSERT_THROW_MES(crypto::secret_key_to_public_key(get_account().get_keys().m_spend_secret_key, signer), "Failed to generate signer public key");
return signer;
}
//----------------------------------------------------------------------------------------------------
crypto::public_key wallet2::get_multisig_signing_public_key(const crypto::secret_key &msk) const

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