diff options
| -rw-r--r-- | src/script/descriptor.cpp | 53 |
1 files changed, 31 insertions, 22 deletions
diff --git a/src/script/descriptor.cpp b/src/script/descriptor.cpp index f71e3b901f..b528aa2ce8 100644 --- a/src/script/descriptor.cpp +++ b/src/script/descriptor.cpp @@ -150,6 +150,14 @@ typedef std::vector<uint32_t> KeyPath; /** Interface for public key objects in descriptors. */ struct PubkeyProvider { +protected: + //! Index of this key expression in the descriptor + //! E.g. If this PubkeyProvider is key1 in multi(2, key1, key2, key3), then m_expr_index = 0 + uint32_t m_expr_index; + +public: + PubkeyProvider(uint32_t exp_index) : m_expr_index(exp_index) {} + virtual ~PubkeyProvider() = default; /** Derive a public key. If key==nullptr, only info is desired. */ @@ -182,7 +190,7 @@ class OriginPubkeyProvider final : public PubkeyProvider } public: - OriginPubkeyProvider(KeyOriginInfo info, std::unique_ptr<PubkeyProvider> provider) : m_origin(std::move(info)), m_provider(std::move(provider)) {} + OriginPubkeyProvider(uint32_t exp_index, KeyOriginInfo info, std::unique_ptr<PubkeyProvider> provider) : PubkeyProvider(exp_index), m_origin(std::move(info)), m_provider(std::move(provider)) {} bool GetPubKey(int pos, const SigningProvider& arg, CPubKey* key, KeyOriginInfo& info) const override { if (!m_provider->GetPubKey(pos, arg, key, info)) return false; @@ -212,7 +220,7 @@ class ConstPubkeyProvider final : public PubkeyProvider CPubKey m_pubkey; public: - ConstPubkeyProvider(const CPubKey& pubkey) : m_pubkey(pubkey) {} + ConstPubkeyProvider(uint32_t exp_index, const CPubKey& pubkey) : PubkeyProvider(exp_index), m_pubkey(pubkey) {} bool GetPubKey(int pos, const SigningProvider& arg, CPubKey* key, KeyOriginInfo& info) const override { if (key) *key = m_pubkey; @@ -272,7 +280,7 @@ class BIP32PubkeyProvider final : public PubkeyProvider } public: - BIP32PubkeyProvider(const CExtPubKey& extkey, KeyPath path, DeriveType derive) : m_extkey(extkey), m_path(std::move(path)), m_derive(derive) {} + BIP32PubkeyProvider(uint32_t exp_index, const CExtPubKey& extkey, KeyPath path, DeriveType derive) : PubkeyProvider(exp_index), m_extkey(extkey), m_path(std::move(path)), m_derive(derive) {} bool IsRange() const override { return m_derive != DeriveType::NO; } size_t GetSize() const override { return 33; } bool GetPubKey(int pos, const SigningProvider& arg, CPubKey* key, KeyOriginInfo& info) const override @@ -698,7 +706,7 @@ NODISCARD bool ParseKeyPath(const std::vector<Span<const char>>& split, KeyPath& } /** Parse a public key that excludes origin information. */ -std::unique_ptr<PubkeyProvider> ParsePubkeyInner(const Span<const char>& sp, bool permit_uncompressed, FlatSigningProvider& out, std::string& error) +std::unique_ptr<PubkeyProvider> ParsePubkeyInner(uint32_t key_exp_index, const Span<const char>& sp, bool permit_uncompressed, FlatSigningProvider& out, std::string& error) { using namespace spanparsing; @@ -714,7 +722,7 @@ std::unique_ptr<PubkeyProvider> ParsePubkeyInner(const Span<const char>& sp, boo CPubKey pubkey(data); if (pubkey.IsFullyValid()) { if (permit_uncompressed || pubkey.IsCompressed()) { - return MakeUnique<ConstPubkeyProvider>(pubkey); + return MakeUnique<ConstPubkeyProvider>(key_exp_index, pubkey); } else { error = "Uncompressed keys are not allowed"; return nullptr; @@ -728,7 +736,7 @@ std::unique_ptr<PubkeyProvider> ParsePubkeyInner(const Span<const char>& sp, boo if (permit_uncompressed || key.IsCompressed()) { CPubKey pubkey = key.GetPubKey(); out.keys.emplace(pubkey.GetID(), key); - return MakeUnique<ConstPubkeyProvider>(pubkey); + return MakeUnique<ConstPubkeyProvider>(key_exp_index, pubkey); } else { error = "Uncompressed keys are not allowed"; return nullptr; @@ -755,11 +763,11 @@ std::unique_ptr<PubkeyProvider> ParsePubkeyInner(const Span<const char>& sp, boo extpubkey = extkey.Neuter(); out.keys.emplace(extpubkey.pubkey.GetID(), extkey.key); } - return MakeUnique<BIP32PubkeyProvider>(extpubkey, std::move(path), type); + return MakeUnique<BIP32PubkeyProvider>(key_exp_index, extpubkey, std::move(path), type); } /** Parse a public key including origin information (if enabled). */ -std::unique_ptr<PubkeyProvider> ParsePubkey(const Span<const char>& sp, bool permit_uncompressed, FlatSigningProvider& out, std::string& error) +std::unique_ptr<PubkeyProvider> ParsePubkey(uint32_t key_exp_index, const Span<const char>& sp, bool permit_uncompressed, FlatSigningProvider& out, std::string& error) { using namespace spanparsing; @@ -768,7 +776,7 @@ std::unique_ptr<PubkeyProvider> ParsePubkey(const Span<const char>& sp, bool per error = "Multiple ']' characters found for a single pubkey"; return nullptr; } - if (origin_split.size() == 1) return ParsePubkeyInner(origin_split[0], permit_uncompressed, out, error); + if (origin_split.size() == 1) return ParsePubkeyInner(key_exp_index, origin_split[0], permit_uncompressed, out, error); if (origin_split[0].size() < 1 || origin_split[0][0] != '[') { error = strprintf("Key origin start '[ character expected but not found, got '%c' instead", origin_split[0][0]); return nullptr; @@ -789,30 +797,30 @@ std::unique_ptr<PubkeyProvider> ParsePubkey(const Span<const char>& sp, bool per assert(fpr_bytes.size() == 4); std::copy(fpr_bytes.begin(), fpr_bytes.end(), info.fingerprint); if (!ParseKeyPath(slash_split, info.path, error)) return nullptr; - auto provider = ParsePubkeyInner(origin_split[1], permit_uncompressed, out, error); + auto provider = ParsePubkeyInner(key_exp_index, origin_split[1], permit_uncompressed, out, error); if (!provider) return nullptr; - return MakeUnique<OriginPubkeyProvider>(std::move(info), std::move(provider)); + return MakeUnique<OriginPubkeyProvider>(key_exp_index, std::move(info), std::move(provider)); } /** Parse a script in a particular context. */ -std::unique_ptr<DescriptorImpl> ParseScript(Span<const char>& sp, ParseScriptContext ctx, FlatSigningProvider& out, std::string& error) +std::unique_ptr<DescriptorImpl> ParseScript(uint32_t key_exp_index, Span<const char>& sp, ParseScriptContext ctx, FlatSigningProvider& out, std::string& error) { using namespace spanparsing; auto expr = Expr(sp); bool sorted_multi = false; if (Func("pk", expr)) { - auto pubkey = ParsePubkey(expr, ctx != ParseScriptContext::P2WSH, out, error); + auto pubkey = ParsePubkey(key_exp_index, expr, ctx != ParseScriptContext::P2WSH, out, error); if (!pubkey) return nullptr; return MakeUnique<PKDescriptor>(std::move(pubkey)); } if (Func("pkh", expr)) { - auto pubkey = ParsePubkey(expr, ctx != ParseScriptContext::P2WSH, out, error); + auto pubkey = ParsePubkey(key_exp_index, expr, ctx != ParseScriptContext::P2WSH, out, error); if (!pubkey) return nullptr; return MakeUnique<PKHDescriptor>(std::move(pubkey)); } if (ctx == ParseScriptContext::TOP && Func("combo", expr)) { - auto pubkey = ParsePubkey(expr, true, out, error); + auto pubkey = ParsePubkey(key_exp_index, expr, true, out, error); if (!pubkey) return nullptr; return MakeUnique<ComboDescriptor>(std::move(pubkey)); } else if (ctx != ParseScriptContext::TOP && Func("combo", expr)) { @@ -834,10 +842,11 @@ std::unique_ptr<DescriptorImpl> ParseScript(Span<const char>& sp, ParseScriptCon return nullptr; } auto arg = Expr(expr); - auto pk = ParsePubkey(arg, ctx != ParseScriptContext::P2WSH, out, error); + auto pk = ParsePubkey(key_exp_index, arg, ctx != ParseScriptContext::P2WSH, out, error); if (!pk) return nullptr; script_size += pk->GetSize() + 1; providers.emplace_back(std::move(pk)); + key_exp_index++; } if (providers.size() < 1 || providers.size() > 16) { error = strprintf("Cannot have %u keys in multisig; must have between 1 and 16 keys, inclusive", providers.size()); @@ -864,7 +873,7 @@ std::unique_ptr<DescriptorImpl> ParseScript(Span<const char>& sp, ParseScriptCon return MakeUnique<MultisigDescriptor>(thres, std::move(providers), sorted_multi); } if (ctx != ParseScriptContext::P2WSH && Func("wpkh", expr)) { - auto pubkey = ParsePubkey(expr, false, out, error); + auto pubkey = ParsePubkey(key_exp_index, expr, false, out, error); if (!pubkey) return nullptr; return MakeUnique<WPKHDescriptor>(std::move(pubkey)); } else if (ctx == ParseScriptContext::P2WSH && Func("wpkh", expr)) { @@ -872,7 +881,7 @@ std::unique_ptr<DescriptorImpl> ParseScript(Span<const char>& sp, ParseScriptCon return nullptr; } if (ctx == ParseScriptContext::TOP && Func("sh", expr)) { - auto desc = ParseScript(expr, ParseScriptContext::P2SH, out, error); + auto desc = ParseScript(key_exp_index, expr, ParseScriptContext::P2SH, out, error); if (!desc || expr.size()) return nullptr; return MakeUnique<SHDescriptor>(std::move(desc)); } else if (ctx != ParseScriptContext::TOP && Func("sh", expr)) { @@ -880,7 +889,7 @@ std::unique_ptr<DescriptorImpl> ParseScript(Span<const char>& sp, ParseScriptCon return nullptr; } if (ctx != ParseScriptContext::P2WSH && Func("wsh", expr)) { - auto desc = ParseScript(expr, ParseScriptContext::P2WSH, out, error); + auto desc = ParseScript(key_exp_index, expr, ParseScriptContext::P2WSH, out, error); if (!desc || expr.size()) return nullptr; return MakeUnique<WSHDescriptor>(std::move(desc)); } else if (ctx == ParseScriptContext::P2WSH && Func("wsh", expr)) { @@ -917,10 +926,10 @@ std::unique_ptr<DescriptorImpl> ParseScript(Span<const char>& sp, ParseScriptCon std::unique_ptr<PubkeyProvider> InferPubkey(const CPubKey& pubkey, ParseScriptContext, const SigningProvider& provider) { - std::unique_ptr<PubkeyProvider> key_provider = MakeUnique<ConstPubkeyProvider>(pubkey); + std::unique_ptr<PubkeyProvider> key_provider = MakeUnique<ConstPubkeyProvider>(0, pubkey); KeyOriginInfo info; if (provider.GetKeyOrigin(pubkey.GetID(), info)) { - return MakeUnique<OriginPubkeyProvider>(std::move(info), std::move(key_provider)); + return MakeUnique<OriginPubkeyProvider>(0, std::move(info), std::move(key_provider)); } return key_provider; } @@ -1032,7 +1041,7 @@ std::unique_ptr<Descriptor> Parse(const std::string& descriptor, FlatSigningProv { Span<const char> sp(descriptor.data(), descriptor.size()); if (!CheckChecksum(sp, require_checksum, error)) return nullptr; - auto ret = ParseScript(sp, ParseScriptContext::TOP, out, error); + auto ret = ParseScript(0, sp, ParseScriptContext::TOP, out, error); if (sp.size() == 0 && ret) return std::unique_ptr<Descriptor>(std::move(ret)); return nullptr; } |