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Merge #13723: PSBT key path cleanups

Browse Source 
917353c8b0 Make SignPSBTInput operate on a private SignatureData object (Pieter Wuille)
cad5dd2368 Pass HD path data through SignatureData (Pieter Wuille)
03a99586a3 Implement key origin lookup in CWallet (Pieter Wuille)
3b01efa0d1 [MOVEONLY] Move ParseHDKeypath to utilstrencodings (Pieter Wuille)
81e1dd5ce1 Generalize PublicOnlySigningProvider into HidingSigningProvider (Pieter Wuille)
84f1f1bfdf Make SigningProvider expose key origin information (Pieter Wuille)
611ab307fb Introduce KeyOriginInfo for fingerprint + path (Pieter Wuille)

Pull request description:

  This PR adds "key origin" (master fingeprint + key path) information to what is exposed from `SigningProvider`s, allowing this information to be used by the generic PSBT code instead of having the RPC pull it directly from the wallet.

  This is also a preparation to having PSBT interact with output descriptors, which can then directly expose key origin information for the scripts they generate.

Tree-SHA512: c718382ba8ba2d6fc9a32c062bd4cff08b6f39b133838aa03115c39aeca0f654c7cc3ec72d87005bf8306e550824cd8eb9d60f0bd41784a3e22e17b2afcfe833
This commit is contained in:
Wladimir J. van der Laan
2018-08-28 16:25:00 +02:00
parent ee9e6e7c5f 917353c8b0
commit aa39ca7645
9 changed files with 160 additions and 134 deletions
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55
src/script/sign.cpp
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@@ -50,10 +50,6 @@ static bool GetCScript(const SigningProvider& provider, const SignatureData& sig
static bool GetPubKey(const SigningProvider& provider, SignatureData& sigdata, const CKeyID& address, CPubKey& pubkey)
{
if (provider.GetPubKey(address, pubkey)) {
sigdata.misc_pubkeys.emplace(pubkey.GetID(), pubkey);
return true;
}
// Look for pubkey in all partial sigs
const auto it = sigdata.signatures.find(address);
if (it != sigdata.signatures.end()) {
@@ -63,7 +59,15 @@ static bool GetPubKey(const SigningProvider& provider, SignatureData& sigdata, c
// Look for pubkey in pubkey list
const auto& pk_it = sigdata.misc_pubkeys.find(address);
if (pk_it != sigdata.misc_pubkeys.end()) {
pubkey = pk_it->second;
pubkey = pk_it->second.first;
return true;
}
// Query the underlying provider
if (provider.GetPubKey(address, pubkey)) {
KeyOriginInfo info;
if (provider.GetKeyOrigin(address, info)) {
sigdata.misc_pubkeys.emplace(address, std::make_pair(pubkey, std::move(info)));
}
return true;
}
return false;
@@ -232,7 +236,7 @@ bool ProduceSignature(const SigningProvider& provider, const BaseSignatureCreato
return sigdata.complete;
}
bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& tx, PSBTInput& input, SignatureData& sigdata, int index, int sighash)
bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& tx, PSBTInput& input, int index, int sighash)
{
// if this input has a final scriptsig or scriptwitness, don't do anything with it
if (!input.final_script_sig.empty() || !input.final_script_witness.IsNull()) {
@@ -240,6 +244,7 @@ bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& t
}
// Fill SignatureData with input info
SignatureData sigdata;
input.FillSignatureData(sigdata);
// Get UTXO
@@ -271,6 +276,16 @@ bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& t
// Verify that a witness signature was produced in case one was required.
if (require_witness_sig && !sigdata.witness) return false;
input.FromSignatureData(sigdata);
// If both UTXO types are present, drop the unnecessary one.
if (input.non_witness_utxo && !input.witness_utxo.IsNull()) {
if (sigdata.witness) {
input.non_witness_utxo = nullptr;
} else {
input.witness_utxo.SetNull();
}
}
return sig_complete;
}
@@ -541,7 +556,7 @@ void PSBTInput::FillSignatureData(SignatureData& sigdata) const
sigdata.witness_script = witness_script;
}
for (const auto& key_pair : hd_keypaths) {
sigdata.misc_pubkeys.emplace(key_pair.first.GetID(), key_pair.first);
sigdata.misc_pubkeys.emplace(key_pair.first.GetID(), key_pair);
}
}
@@ -569,6 +584,9 @@ void PSBTInput::FromSignatureData(const SignatureData& sigdata)
if (witness_script.empty() && !sigdata.witness_script.empty()) {
witness_script = sigdata.witness_script;
}
for (const auto& entry : sigdata.misc_pubkeys) {
hd_keypaths.emplace(entry.second);
}
}
void PSBTInput::Merge(const PSBTInput& input)
@@ -610,7 +628,7 @@ void PSBTOutput::FillSignatureData(SignatureData& sigdata) const
sigdata.witness_script = witness_script;
}
for (const auto& key_pair : hd_keypaths) {
sigdata.misc_pubkeys.emplace(key_pair.first.GetID(), key_pair.first);
sigdata.misc_pubkeys.emplace(key_pair.first.GetID(), key_pair);
}
}
@@ -622,6 +640,9 @@ void PSBTOutput::FromSignatureData(const SignatureData& sigdata)
if (witness_script.empty() && !sigdata.witness_script.empty()) {
witness_script = sigdata.witness_script;
}
for (const auto& entry : sigdata.misc_pubkeys) {
hd_keypaths.emplace(entry.second);
}
}
bool PSBTOutput::IsNull() const
@@ -638,14 +659,26 @@ void PSBTOutput::Merge(const PSBTOutput& output)
if (witness_script.empty() && !output.witness_script.empty()) witness_script = output.witness_script;
}
bool PublicOnlySigningProvider::GetCScript(const CScriptID &scriptid, CScript& script) const
bool HidingSigningProvider::GetCScript(const CScriptID& scriptid, CScript& script) const
{
return m_provider->GetCScript(scriptid, script);
}
bool PublicOnlySigningProvider::GetPubKey(const CKeyID &address, CPubKey& pubkey) const
bool HidingSigningProvider::GetPubKey(const CKeyID& keyid, CPubKey& pubkey) const
{
return m_provider->GetPubKey(address, pubkey);
return m_provider->GetPubKey(keyid, pubkey);
}
bool HidingSigningProvider::GetKey(const CKeyID& keyid, CKey& key) const
{
if (m_hide_secret) return false;
return m_provider->GetKey(keyid, key);
}
bool HidingSigningProvider::GetKeyOrigin(const CKeyID& keyid, KeyOriginInfo& info) const
{
if (m_hide_origin) return false;
return m_provider->GetKeyOrigin(keyid, info);
}
bool FlatSigningProvider::GetCScript(const CScriptID& scriptid, CScript& script) const { return LookupHelper(scripts, scriptid, script); }