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wallet: allow signing a message with spend or view key

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pull/320/head
moneromooo-monero 4 years ago committed by Sarang Noether
parent 5946002105
commit 743608ec16
16 changed files with 179 additions and 44 deletions
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1
src/cryptonote_config.h
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@ -230,6 +230,7 @@ namespace config
const unsigned char HASH_KEY_CLSAG_ROUND[] = "CLSAG_round";
const unsigned char HASH_KEY_CLSAG_AGG_0[] = "CLSAG_agg_0";
const unsigned char HASH_KEY_CLSAG_AGG_1[] = "CLSAG_agg_1";
const char HASH_KEY_MESSAGE_SIGNING[] = "MessageSignature";
namespace testnet
{

1
src/device/device.hpp
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@ -162,6 +162,7 @@ namespace hw {
virtual std::vector<crypto::public_key> get_subaddress_spend_public_keys(const cryptonote::account_keys &keys, uint32_t account, uint32_t begin, uint32_t end) = 0;
virtual cryptonote::account_public_address get_subaddress(const cryptonote::account_keys& keys, const cryptonote::subaddress_index &index) = 0;
virtual crypto::secret_key get_subaddress_secret_key(const crypto::secret_key &sec, const cryptonote::subaddress_index &index) = 0;
virtual crypto::secret_key get_subaddress_view_secret_key(const crypto::secret_key &sec, const cryptonote::subaddress_index &index) = 0;
/* ======================================================================= */
/* DERIVATION & KEY */

6
src/device/device_default.cpp
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@ -207,6 +207,12 @@ namespace hw {
return m;
}
crypto::secret_key device_default::get_subaddress_view_secret_key(const crypto::secret_key &a, const cryptonote::subaddress_index &index) {
crypto::secret_key skey = get_subaddress_secret_key(a, index);
sc_mul((unsigned char*)skey.data, (const unsigned char*)skey.data, (const unsigned char*)a.data);
return skey;
}
/* ======================================================================= */
/* DERIVATION & KEY */
/* ======================================================================= */

1
src/device/device_default.hpp
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@ -85,6 +85,7 @@ namespace hw {
std::vector<crypto::public_key> get_subaddress_spend_public_keys(const cryptonote::account_keys &keys, uint32_t account, uint32_t begin, uint32_t end) override;
cryptonote::account_public_address get_subaddress(const cryptonote::account_keys& keys, const cryptonote::subaddress_index &index) override;
crypto::secret_key get_subaddress_secret_key(const crypto::secret_key &sec, const cryptonote::subaddress_index &index) override;
crypto::secret_key get_subaddress_view_secret_key(const crypto::secret_key &sec, const cryptonote::subaddress_index &index) override;
/* ======================================================================= */
/* DERIVATION & KEY */

6
src/device/device_ledger.cpp
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@ -880,6 +880,12 @@ namespace hw {
return sub_sec;
}
crypto::secret_key device_ledger::get_subaddress_view_secret_key(const crypto::secret_key &sec, const cryptonote::subaddress_index &index) {
#warning TODO
MERROR("Not implemented yet");
return crypto::null_skey;
}
/* ======================================================================= */
/* DERIVATION & KEY */
/* ======================================================================= */

1
src/device/device_ledger.hpp
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@ -249,6 +249,7 @@ namespace hw {
std::vector<crypto::public_key> get_subaddress_spend_public_keys(const cryptonote::account_keys &keys, uint32_t account, uint32_t begin, uint32_t end) override;
cryptonote::account_public_address get_subaddress(const cryptonote::account_keys& keys, const cryptonote::subaddress_index &index) override;
crypto::secret_key get_subaddress_secret_key(const crypto::secret_key &sec, const cryptonote::subaddress_index &index) override;
crypto::secret_key get_subaddress_view_secret_key(const crypto::secret_key &sec, const cryptonote::subaddress_index &index) override;
/* ======================================================================= */
/* DERIVATION & KEY */

38
src/simplewallet/simplewallet.cpp
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@ -223,7 +223,7 @@ namespace
const char* USAGE_GET_TX_NOTE("get_tx_note <txid>");
const char* USAGE_GET_DESCRIPTION("get_description");
const char* USAGE_SET_DESCRIPTION("set_description [free text note]");
const char* USAGE_SIGN("sign [<account_index>,<address_index>] <filename>");
const char* USAGE_SIGN("sign [<account_index>,<address_index>] [--spend|--view|--both] <filename>");
const char* USAGE_VERIFY("verify <filename> <address> <signature>");
const char* USAGE_EXPORT_KEY_IMAGES("export_key_images [all] <filename>");
const char* USAGE_IMPORT_KEY_IMAGES("import_key_images <filename>");
@ -9877,7 +9877,7 @@ bool simple_wallet::sign(const std::vector<std::string> &args)
fail_msg_writer() << tr("command not supported by HW wallet");
return true;
}
if (args.size() != 1 && args.size() != 2)
if (args.size() != 1 && args.size() != 2 && args.size() != 3)
{
PRINT_USAGE(USAGE_SIGN);
return true;
@ -9893,17 +9893,33 @@ bool simple_wallet::sign(const std::vector<std::string> &args)
return true;
}
tools::wallet2::message_signature_type_t message_signature_type = tools::wallet2::sign_with_spend_key;
subaddress_index index{0, 0};
if (args.size() == 2)
for (unsigned int idx = 0; idx + 1 < args.size(); ++idx)
{
unsigned int a, b;
if (sscanf(args[0].c_str(), "%u,%u", &a, &b) != 2)
if (sscanf(args[idx].c_str(), "%u,%u", &a, &b) == 2)
{
fail_msg_writer() << tr("Invalid subaddress index format");
index.major = a;
index.minor = b;
}
else if (args[idx] == "--spend")
{
message_signature_type = tools::wallet2::sign_with_spend_key;
}
else if (args[idx] == "--view")
{
message_signature_type = tools::wallet2::sign_with_view_key;
}
else if (args[idx] == "--both")
{
message_signature_type = tools::wallet2::sign_with_both_keys;
}
else
{
fail_msg_writer() << tr("Invalid subaddress index format, and not a signature type: ") << args[idx];
return true;
}
index.major = a;
index.minor = b;
}
const std::string &filename = args.back();
@ -9917,7 +9933,7 @@ bool simple_wallet::sign(const std::vector<std::string> &args)
SCOPED_WALLET_UNLOCK();
std::string signature = m_wallet->sign(data, index);
std::string signature = m_wallet->sign(data, message_signature_type, index);
success_msg_writer() << signature;
return true;
}
@ -9948,14 +9964,14 @@ bool simple_wallet::verify(const std::vector<std::string> &args)
return true;
}
r = m_wallet->verify(data, info.address, signature);
if (!r)
tools::wallet2::message_signature_result_t result = m_wallet->verify(data, info.address, signature);
if (!result.valid)
{
fail_msg_writer() << tr("Bad signature from ") << address_string;
}
else
{
success_msg_writer() << tr("Good signature from ") << address_string;
success_msg_writer() << tr("Good signature from ") << address_string << (result.old ? " (using old signature algorithm)" : "") << " with " << (result.type == tools::wallet2::sign_with_spend_key ? "spend key" : result.type == tools::wallet2::sign_with_view_key ? "view key" : result.type == tools::wallet2::sign_with_both_keys ? "both spend and view keys" : "unknown key combination (suspicious)");
}
return true;
}

4
src/wallet/api/wallet.cpp
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@ -1998,7 +1998,7 @@ bool WalletImpl::checkReserveProof(const std::string &address, const std::string
std::string WalletImpl::signMessage(const std::string &message)
{
return m_wallet->sign(message);
return m_wallet->sign(message, tools::wallet2::sign_with_spend_key);
}
bool WalletImpl::verifySignedMessage(const std::string &message, const std::string &address, const std::string &signature) const
@ -2008,7 +2008,7 @@ bool WalletImpl::verifySignedMessage(const std::string &message, const std::stri
if (!cryptonote::get_account_address_from_str(info, m_wallet->nettype(), address))
return false;
return m_wallet->verify(message, info.address, signature);
return m_wallet->verify(message, info.address, signature).valid;
}
std::string WalletImpl::signMultisigParticipant(const std::string &message) const

101
src/wallet/wallet2.cpp
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@ -12207,51 +12207,114 @@ void wallet2::set_account_tag_description(const std::string& tag, const std::str
m_account_tags.first[tag] = description;
}
std::string wallet2::sign(const std::string &data, cryptonote::subaddress_index index) const
{
static crypto::hash get_message_hash(const std::string &data)
{
KECCAK_CTX ctx;
keccak_init(&ctx);
keccak_update(&ctx, (const uint8_t*)config::HASH_KEY_MESSAGE_SIGNING, sizeof(config::HASH_KEY_MESSAGE_SIGNING)); // includes NUL
char len_buf[(sizeof(size_t) * 8 + 6) / 7];
char *ptr = len_buf;
tools::write_varint(ptr, data.size());
CHECK_AND_ASSERT_THROW_MES(ptr > len_buf && ptr <= len_buf + sizeof(len_buf), "Length overflow");
keccak_update(&ctx, (const uint8_t*)len_buf, ptr - len_buf);
keccak_update(&ctx, (const uint8_t*)data.data(), data.size());
crypto::hash hash;
crypto::cn_fast_hash(data.data(), data.size(), hash);
keccak_finish(&ctx, (uint8_t*)&hash);
return hash;
}
std::string wallet2::sign(const std::string &data, message_signature_type_t signature_type, cryptonote::subaddress_index index) const
{
const crypto::hash hash = get_message_hash(data);
const cryptonote::account_keys &keys = m_account.get_keys();
crypto::signature signature;
crypto::secret_key skey;
crypto::secret_key skey, m;
crypto::public_key pkey;
if (index.is_zero())
{
skey = keys.m_spend_secret_key;
pkey = keys.m_account_address.m_spend_public_key;
switch (signature_type)
{
case sign_with_spend_key:
skey = keys.m_spend_secret_key;
pkey = keys.m_account_address.m_spend_public_key;
break;
case sign_with_view_key:
skey = keys.m_view_secret_key;
pkey = keys.m_account_address.m_view_public_key;
break;
#if 0
case sign_with_both_keys:
#endif
default: CHECK_AND_ASSERT_THROW_MES(false, "Invalid signature type requested");
}
}
else
{
skey = keys.m_spend_secret_key;
crypto::secret_key m = m_account.get_device().get_subaddress_secret_key(keys.m_view_secret_key, index);
sc_add((unsigned char*)&skey, (unsigned char*)&m, (unsigned char*)&skey);
switch (signature_type)
{
case sign_with_spend_key:
skey = keys.m_spend_secret_key;
m = m_account.get_device().get_subaddress_secret_key(keys.m_view_secret_key, index);
sc_add((unsigned char*)&skey, (unsigned char*)&m, (unsigned char*)&skey);
break;
case sign_with_view_key:
skey = keys.m_spend_secret_key;
m = m_account.get_device().get_subaddress_secret_key(keys.m_view_secret_key, index);
sc_add((unsigned char*)&skey, (unsigned char*)&m, (unsigned char*)&skey);
sc_mul((unsigned char*)&skey, (unsigned char*)&keys.m_view_secret_key, (unsigned char*)&skey);
break;
#if 0
case sign_with_both_keys: skey = ...; break;
#endif
default: CHECK_AND_ASSERT_THROW_MES(false, "Invalid signature type requested");
}
secret_key_to_public_key(skey, pkey);
}
crypto::generate_signature(hash, pkey, skey, signature);
return std::string("SigV1") + tools::base58::encode(std::string((const char *)&signature, sizeof(signature)));
return std::string("SigV2") + tools::base58::encode(std::string((const char *)&signature, sizeof(signature)));
}
bool wallet2::verify(const std::string &data, const cryptonote::account_public_address &address, const std::string &signature) const
tools::wallet2::message_signature_result_t wallet2::verify(const std::string &data, const cryptonote::account_public_address &address, const std::string &signature) const
{
const size_t header_len = strlen("SigV1");
if (signature.size() < header_len || signature.substr(0, header_len) != "SigV1") {
static const size_t v1_header_len = strlen("SigV1");
static const size_t v2_header_len = strlen("SigV2");
const bool v1 = signature.size() >= v1_header_len && signature.substr(0, v1_header_len) == "SigV1";
const bool v2 = signature.size() >= v2_header_len && signature.substr(0, v2_header_len) == "SigV2";
if (!v1 && !v2)
{
LOG_PRINT_L0("Signature header check error");
return false;
return {};
}
crypto::hash hash;
crypto::cn_fast_hash(data.data(), data.size(), hash);
if (v1)
{
crypto::cn_fast_hash(data.data(), data.size(), hash);
}
else
{
hash = get_message_hash(data);
}
std::string decoded;
if (!tools::base58::decode(signature.substr(header_len), decoded)) {
if (!tools::base58::decode(signature.substr(v1 ? v1_header_len : v2_header_len), decoded)) {
LOG_PRINT_L0("Signature decoding error");
return false;
return {};
}
crypto::signature s;
if (sizeof(s) != decoded.size()) {
LOG_PRINT_L0("Signature decoding error");
return false;
return {};
}
memcpy(&s, decoded.data(), sizeof(s));
return crypto::check_signature(hash, address.m_spend_public_key, s);
if (crypto::check_signature(hash, address.m_spend_public_key, s))
return {true, v1 ? 1u : 2u, !v2, sign_with_spend_key };
if (crypto::check_signature(hash, address.m_view_public_key, s))
return {true, v1 ? 1u : 2u, !v2, sign_with_view_key };
#if 0
rct::key both = ...;
if (crypto::check_signature(hash, rct::rct2pk(both), s))
return {true, v1 ? 1u : 2u, !v2, sign_with_both_keys };
#endif
return {};
}
std::string wallet2::sign_multisig_participant(const std::string& data) const

6
src/wallet/wallet2.h
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@ -1341,8 +1341,10 @@ private:
*/
void set_account_tag_description(const std::string& tag, const std::string& description);
std::string sign(const std::string &data, cryptonote::subaddress_index index = {0, 0}) const;
bool verify(const std::string &data, const cryptonote::account_public_address &address, const std::string &signature) const;
enum message_signature_type_t { sign_with_spend_key, sign_with_view_key, sign_with_both_keys };
std::string sign(const std::string &data, message_signature_type_t signature_type, cryptonote::subaddress_index index = {0, 0}) const;
struct message_signature_result_t { bool valid; unsigned version; bool old; message_signature_type_t type; };
message_signature_result_t verify(const std::string &data, const cryptonote::account_public_address &address, const std::string &signature) const;
/*!
* \brief sign_multisig_participant signs given message with the multisig public signer key

27
src/wallet/wallet_rpc_server.cpp
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@ -2007,7 +2007,20 @@ namespace tools
return false;
}
res.signature = m_wallet->sign(req.data, {req.account_index, req.address_index});
tools::wallet2::message_signature_type_t signature_type = tools::wallet2::sign_with_spend_key;
if (req.signature_type == "spend" || req.signature_type == "")
signature_type = tools::wallet2::sign_with_spend_key;
else if (req.signature_type == "view")
signature_type = tools::wallet2::sign_with_view_key;
else if (req.signature_type == "both")
signature_type = tools::wallet2::sign_with_both_keys;
else
{
er.code = WALLET_RPC_ERROR_CODE_INVALID_SIGNATURE_TYPE;
er.message = "Invalid signature type requested";
return false;
}
res.signature = m_wallet->sign(req.data, signature_type, {req.account_index, req.address_index});
return true;
}
//------------------------------------------------------------------------------------------------------------------------------
@ -2042,7 +2055,17 @@ namespace tools
return false;
}
res.good = m_wallet->verify(req.data, info.address, req.signature);
const auto result = m_wallet->verify(req.data, info.address, req.signature);
res.good = result.valid;
res.version = result.version;
res.old = result.old;
switch (result.type)
{
case tools::wallet2::sign_with_spend_key: res.signature_type = "spend"; break;
case tools::wallet2::sign_with_view_key: res.signature_type = "view"; break;
case tools::wallet2::sign_with_both_keys: res.signature_type = "both"; break;
default: res.signature_type = "invalid"; break;
}
return true;
}
//------------------------------------------------------------------------------------------------------------------------------

8
src/wallet/wallet_rpc_server_commands_defs.h
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@ -1618,11 +1618,13 @@ namespace wallet_rpc
std::string data;
uint32_t account_index;
uint32_t address_index;
std::string signature_type;
BEGIN_KV_SERIALIZE_MAP()
KV_SERIALIZE(data)
KV_SERIALIZE_OPT(account_index, 0u)
KV_SERIALIZE_OPT(address_index, 0u)
KV_SERIALIZE(signature_type)
END_KV_SERIALIZE_MAP()
};
typedef epee::misc_utils::struct_init<request_t> request;
@ -1657,9 +1659,15 @@ namespace wallet_rpc
struct response_t
{
bool good;
unsigned version;
bool old;
std::string signature_type;
BEGIN_KV_SERIALIZE_MAP()
KV_SERIALIZE(good);
KV_SERIALIZE(version);
KV_SERIALIZE(old);
KV_SERIALIZE(signature_type);
END_KV_SERIALIZE_MAP()
};
typedef epee::misc_utils::struct_init<response_t> response;

1
src/wallet/wallet_rpc_server_error_codes.h
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@ -76,3 +76,4 @@
#define WALLET_RPC_ERROR_CODE_NON_DETERMINISTIC -43
#define WALLET_RPC_ERROR_CODE_INVALID_LOG_LEVEL -44
#define WALLET_RPC_ERROR_CODE_ATTRIBUTE_NOT_FOUND -45
#define WALLET_RPC_ERROR_CODE_INVALID_SIGNATURE_TYPE -47

15
tests/functional_tests/sign_message.py
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@ -43,8 +43,10 @@ from framework.wallet import Wallet
class MessageSigningTest():
def run_test(self):
self.create()
self.check_signing(False)
self.check_signing(True)
self.check_signing(False, False)
self.check_signing(False, True)
self.check_signing(True, False)
self.check_signing(True, True)
def create(self):
print('Creating wallets')
@ -66,8 +68,8 @@ class MessageSigningTest():
assert res.address == self.address[i]
assert res.seed == seeds[i]
def check_signing(self, subaddress):
print('Signing/verifing messages with ' + ('subaddress' if subaddress else 'standard address'))
def check_signing(self, subaddress, spend_key):
print('Signing/verifing messages with ' + ('subaddress' if subaddress else 'standard address') + ' ' + ('spend key' if spend_key else 'view key'))
messages = ['foo', '']
if subaddress:
address = []
@ -84,11 +86,14 @@ class MessageSigningTest():
account_index = 0
address_index = 0
for message in messages:
res = self.wallet[0].sign(message, account_index = account_index, address_index = address_index)
res = self.wallet[0].sign(message, account_index = account_index, address_index = address_index, signature_type = 'spend' if spend_key else 'view')
signature = res.signature
for i in range(2):
res = self.wallet[i].verify(message, address[0], signature)
assert res.good
assert not res.old
assert res.version == 2
assert res.signature_type == 'spend' if spend_key else 'view'
res = self.wallet[i].verify('different', address[0], signature)
assert not res.good
res = self.wallet[i].verify(message, address[1], signature)

4
tests/fuzz/signature.cpp
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@ -59,6 +59,6 @@ BEGIN_INIT_SIMPLE_FUZZER()
END_INIT_SIMPLE_FUZZER()
BEGIN_SIMPLE_FUZZER()
bool valid = wallet->verify("test", address, std::string((const char*)buf, len));
std::cout << "Signature " << (valid ? "valid" : "invalid") << std::endl;
tools::wallet2::message_signature_result_t result = wallet->verify("test", address, s);
std::cout << "Signature " << (result.valid ? "valid" : "invalid") << std::endl;
END_SIMPLE_FUZZER()

3
utils/python-rpc/framework/wallet.py
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@ -706,13 +706,14 @@ class Wallet(object):
}
return self.rpc.send_json_rpc_request(check_reserve_proof)
def sign(self, data, account_index = 0, address_index = 0):
def sign(self, data, account_index = 0, address_index = 0, signature_type = ""):
sign = {
'method': 'sign',
'params' : {
'data': data,
'account_index': account_index,
'address_index': address_index,
'signature_type': signature_type,
},
'jsonrpc': '2.0',
'id': '0'

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