diff options
| -rw-r--r-- | src/pubkey.cpp | 17 | ||||
| -rw-r--r-- | src/pubkey.h | 5 | ||||
| -rw-r--r-- | src/script/descriptor.cpp | 8 | ||||
| -rw-r--r-- | src/script/sign.cpp | 17 | ||||
| -rw-r--r-- | src/script/signingprovider.h | 24 |
5 files changed, 48 insertions, 23 deletions
diff --git a/src/pubkey.cpp b/src/pubkey.cpp index 75202e7cf4..100b315615 100644 --- a/src/pubkey.cpp +++ b/src/pubkey.cpp @@ -180,6 +180,23 @@ XOnlyPubKey::XOnlyPubKey(Span<const unsigned char> bytes) std::copy(bytes.begin(), bytes.end(), m_keydata.begin()); } +std::vector<CKeyID> XOnlyPubKey::GetKeyIDs() const +{ + std::vector<CKeyID> out; + // For now, use the old full pubkey-based key derivation logic. As it is indexed by + // Hash160(full pubkey), we need to return both a version prefixed with 0x02, and one + // with 0x03. + unsigned char b[33] = {0x02}; + std::copy(m_keydata.begin(), m_keydata.end(), b + 1); + CPubKey fullpubkey; + fullpubkey.Set(b, b + 33); + out.push_back(fullpubkey.GetID()); + b[0] = 0x03; + fullpubkey.Set(b, b + 33); + out.push_back(fullpubkey.GetID()); + return out; +} + bool XOnlyPubKey::IsFullyValid() const { secp256k1_xonly_pubkey pubkey; diff --git a/src/pubkey.h b/src/pubkey.h index eec34a89c2..861a2cf500 100644 --- a/src/pubkey.h +++ b/src/pubkey.h @@ -267,6 +267,11 @@ public: /** Construct a Taproot tweaked output point with this point as internal key. */ std::optional<std::pair<XOnlyPubKey, bool>> CreateTapTweak(const uint256* merkle_root) const; + /** Returns a list of CKeyIDs for the CPubKeys that could have been used to create this XOnlyPubKey. + * This is needed for key lookups since keys are indexed by CKeyID. + */ + std::vector<CKeyID> GetKeyIDs() const; + const unsigned char& operator[](int pos) const { return *(m_keydata.begin() + pos); } const unsigned char* data() const { return m_keydata.begin(); } static constexpr size_t size() { return decltype(m_keydata)::size(); } diff --git a/src/script/descriptor.cpp b/src/script/descriptor.cpp index 682b55742a..621a1b9fd6 100644 --- a/src/script/descriptor.cpp +++ b/src/script/descriptor.cpp @@ -1242,14 +1242,8 @@ std::unique_ptr<PubkeyProvider> InferXOnlyPubkey(const XOnlyPubKey& xkey, ParseS CPubKey pubkey(full_key); std::unique_ptr<PubkeyProvider> key_provider = std::make_unique<ConstPubkeyProvider>(0, pubkey, true); KeyOriginInfo info; - if (provider.GetKeyOrigin(pubkey.GetID(), info)) { + if (provider.GetKeyOriginByXOnly(xkey, info)) { return std::make_unique<OriginPubkeyProvider>(0, std::move(info), std::move(key_provider)); - } else { - full_key[0] = 0x03; - pubkey = CPubKey(full_key); - if (provider.GetKeyOrigin(pubkey.GetID(), info)) { - return std::make_unique<OriginPubkeyProvider>(0, std::move(info), std::move(key_provider)); - } } return key_provider; } diff --git a/src/script/sign.cpp b/src/script/sign.cpp index 4714d0ef11..b912b00365 100644 --- a/src/script/sign.cpp +++ b/src/script/sign.cpp @@ -60,22 +60,7 @@ bool MutableTransactionSignatureCreator::CreateSchnorrSig(const SigningProvider& assert(sigversion == SigVersion::TAPROOT || sigversion == SigVersion::TAPSCRIPT); CKey key; - { - // For now, use the old full pubkey-based key derivation logic. As it is indexed by - // Hash160(full pubkey), we need to try both a version prefixed with 0x02, and one - // with 0x03. - unsigned char b[33] = {0x02}; - std::copy(pubkey.begin(), pubkey.end(), b + 1); - CPubKey fullpubkey; - fullpubkey.Set(b, b + 33); - CKeyID keyid = fullpubkey.GetID(); - if (!provider.GetKey(keyid, key)) { - b[0] = 0x03; - fullpubkey.Set(b, b + 33); - CKeyID keyid = fullpubkey.GetID(); - if (!provider.GetKey(keyid, key)) return false; - } - } + if (!provider.GetKeyByXOnly(pubkey, key)) return false; // BIP341/BIP342 signing needs lots of precomputed transaction data. While some // (non-SIGHASH_DEFAULT) sighash modes exist that can work with just some subset diff --git a/src/script/signingprovider.h b/src/script/signingprovider.h index 939ae10622..fbce61c6a9 100644 --- a/src/script/signingprovider.h +++ b/src/script/signingprovider.h @@ -26,6 +26,30 @@ public: virtual bool HaveKey(const CKeyID &address) const { return false; } virtual bool GetKeyOrigin(const CKeyID& keyid, KeyOriginInfo& info) const { return false; } virtual bool GetTaprootSpendData(const XOnlyPubKey& output_key, TaprootSpendData& spenddata) const { return false; } + + bool GetKeyByXOnly(const XOnlyPubKey& pubkey, CKey& key) const + { + for (const auto& id : pubkey.GetKeyIDs()) { + if (GetKey(id, key)) return true; + } + return false; + } + + bool GetPubKeyByXOnly(const XOnlyPubKey& pubkey, CPubKey& out) const + { + for (const auto& id : pubkey.GetKeyIDs()) { + if (GetPubKey(id, out)) return true; + } + return false; + } + + bool GetKeyOriginByXOnly(const XOnlyPubKey& pubkey, KeyOriginInfo& info) const + { + for (const auto& id : pubkey.GetKeyIDs()) { + if (GetKeyOrigin(id, info)) return true; + } + return false; + } }; extern const SigningProvider& DUMMY_SIGNING_PROVIDER; |