aboutsummaryrefslogtreecommitdiff
path: root/src/script
diff options
context:
space:
mode:
Diffstat (limited to 'src/script')
-rw-r--r--src/script/bitcoinconsensus.cpp2
-rw-r--r--src/script/bitcoinconsensus.h2
-rw-r--r--src/script/descriptor.cpp566
-rw-r--r--src/script/descriptor.h102
-rw-r--r--src/script/interpreter.cpp14
-rw-r--r--src/script/interpreter.h2
-rw-r--r--src/script/ismine.cpp2
-rw-r--r--src/script/ismine.h2
-rw-r--r--src/script/script.cpp2
-rw-r--r--src/script/script.h2
-rw-r--r--src/script/script_error.cpp2
-rw-r--r--src/script/script_error.h2
-rw-r--r--src/script/sigcache.cpp2
-rw-r--r--src/script/sigcache.h2
-rw-r--r--src/script/sign.cpp74
-rw-r--r--src/script/sign.h75
-rw-r--r--src/script/standard.cpp2
-rw-r--r--src/script/standard.h2
18 files changed, 807 insertions, 50 deletions
diff --git a/src/script/bitcoinconsensus.cpp b/src/script/bitcoinconsensus.cpp
index e2370c5e5..01cfeb23f 100644
--- a/src/script/bitcoinconsensus.cpp
+++ b/src/script/bitcoinconsensus.cpp
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/script/bitcoinconsensus.h b/src/script/bitcoinconsensus.h
index 5973808fa..c5dceac84 100644
--- a/src/script/bitcoinconsensus.h
+++ b/src/script/bitcoinconsensus.h
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/script/descriptor.cpp b/src/script/descriptor.cpp
new file mode 100644
index 000000000..f366b99ec
--- /dev/null
+++ b/src/script/descriptor.cpp
@@ -0,0 +1,566 @@
+// Copyright (c) 2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <script/descriptor.h>
+
+#include <key_io.h>
+#include <pubkey.h>
+#include <script/script.h>
+#include <script/standard.h>
+
+#include <span.h>
+#include <util.h>
+#include <utilstrencodings.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace {
+
+////////////////////////////////////////////////////////////////////////////
+// Internal representation //
+////////////////////////////////////////////////////////////////////////////
+
+typedef std::vector<uint32_t> KeyPath;
+
+std::string FormatKeyPath(const KeyPath& path)
+{
+ std::string ret;
+ for (auto i : path) {
+ ret += strprintf("/%i", (i << 1) >> 1);
+ if (i >> 31) ret += '\'';
+ }
+ return ret;
+}
+
+/** Interface for public key objects in descriptors. */
+struct PubkeyProvider
+{
+ virtual ~PubkeyProvider() = default;
+
+ /** Derive a public key. */
+ virtual bool GetPubKey(int pos, const SigningProvider& arg, CPubKey& out) const = 0;
+
+ /** Whether this represent multiple public keys at different positions. */
+ virtual bool IsRange() const = 0;
+
+ /** Get the size of the generated public key(s) in bytes (33 or 65). */
+ virtual size_t GetSize() const = 0;
+
+ /** Get the descriptor string form. */
+ virtual std::string ToString() const = 0;
+
+ /** Get the descriptor string form including private data (if available in arg). */
+ virtual bool ToPrivateString(const SigningProvider& arg, std::string& out) const = 0;
+};
+
+/** An object representing a parsed constant public key in a descriptor. */
+class ConstPubkeyProvider final : public PubkeyProvider
+{
+ CPubKey m_pubkey;
+
+public:
+ ConstPubkeyProvider(const CPubKey& pubkey) : m_pubkey(pubkey) {}
+ bool GetPubKey(int pos, const SigningProvider& arg, CPubKey& out) const override
+ {
+ out = m_pubkey;
+ return true;
+ }
+ bool IsRange() const override { return false; }
+ size_t GetSize() const override { return m_pubkey.size(); }
+ std::string ToString() const override { return HexStr(m_pubkey.begin(), m_pubkey.end()); }
+ bool ToPrivateString(const SigningProvider& arg, std::string& ret) const override
+ {
+ CKey key;
+ if (!arg.GetKey(m_pubkey.GetID(), key)) return false;
+ ret = EncodeSecret(key);
+ return true;
+ }
+};
+
+enum class DeriveType {
+ NO,
+ UNHARDENED,
+ HARDENED,
+};
+
+/** An object representing a parsed extended public key in a descriptor. */
+class BIP32PubkeyProvider final : public PubkeyProvider
+{
+ CExtPubKey m_extkey;
+ KeyPath m_path;
+ DeriveType m_derive;
+
+ bool GetExtKey(const SigningProvider& arg, CExtKey& ret) const
+ {
+ CKey key;
+ if (!arg.GetKey(m_extkey.pubkey.GetID(), key)) return false;
+ ret.nDepth = m_extkey.nDepth;
+ std::copy(m_extkey.vchFingerprint, m_extkey.vchFingerprint + 4, ret.vchFingerprint);
+ ret.nChild = m_extkey.nChild;
+ ret.chaincode = m_extkey.chaincode;
+ ret.key = key;
+ return true;
+ }
+
+ bool IsHardened() const
+ {
+ if (m_derive == DeriveType::HARDENED) return true;
+ for (auto entry : m_path) {
+ if (entry >> 31) return true;
+ }
+ return false;
+ }
+
+public:
+ BIP32PubkeyProvider(const CExtPubKey& extkey, KeyPath path, DeriveType derive) : 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& out) const override
+ {
+ if (IsHardened()) {
+ CExtKey key;
+ if (!GetExtKey(arg, key)) return false;
+ for (auto entry : m_path) {
+ key.Derive(key, entry);
+ }
+ if (m_derive == DeriveType::UNHARDENED) key.Derive(key, pos);
+ if (m_derive == DeriveType::HARDENED) key.Derive(key, pos | 0x80000000UL);
+ out = key.Neuter().pubkey;
+ } else {
+ // TODO: optimize by caching
+ CExtPubKey key = m_extkey;
+ for (auto entry : m_path) {
+ key.Derive(key, entry);
+ }
+ if (m_derive == DeriveType::UNHARDENED) key.Derive(key, pos);
+ assert(m_derive != DeriveType::HARDENED);
+ out = key.pubkey;
+ }
+ return true;
+ }
+ std::string ToString() const override
+ {
+ std::string ret = EncodeExtPubKey(m_extkey) + FormatKeyPath(m_path);
+ if (IsRange()) {
+ ret += "/*";
+ if (m_derive == DeriveType::HARDENED) ret += '\'';
+ }
+ return ret;
+ }
+ bool ToPrivateString(const SigningProvider& arg, std::string& out) const override
+ {
+ CExtKey key;
+ if (!GetExtKey(arg, key)) return false;
+ out = EncodeExtKey(key) + FormatKeyPath(m_path);
+ if (IsRange()) {
+ out += "/*";
+ if (m_derive == DeriveType::HARDENED) out += '\'';
+ }
+ return true;
+ }
+};
+
+/** A parsed addr(A) descriptor. */
+class AddressDescriptor final : public Descriptor
+{
+ CTxDestination m_destination;
+
+public:
+ AddressDescriptor(CTxDestination destination) : m_destination(std::move(destination)) {}
+
+ bool IsRange() const override { return false; }
+ std::string ToString() const override { return "addr(" + EncodeDestination(m_destination) + ")"; }
+ bool ToPrivateString(const SigningProvider& arg, std::string& out) const override { out = ToString(); return true; }
+ bool Expand(int pos, const SigningProvider& arg, std::vector<CScript>& output_scripts, FlatSigningProvider& out) const override
+ {
+ output_scripts = std::vector<CScript>{GetScriptForDestination(m_destination)};
+ return true;
+ }
+};
+
+/** A parsed raw(H) descriptor. */
+class RawDescriptor final : public Descriptor
+{
+ CScript m_script;
+
+public:
+ RawDescriptor(CScript script) : m_script(std::move(script)) {}
+
+ bool IsRange() const override { return false; }
+ std::string ToString() const override { return "raw(" + HexStr(m_script.begin(), m_script.end()) + ")"; }
+ bool ToPrivateString(const SigningProvider& arg, std::string& out) const override { out = ToString(); return true; }
+ bool Expand(int pos, const SigningProvider& arg, std::vector<CScript>& output_scripts, FlatSigningProvider& out) const override
+ {
+ output_scripts = std::vector<CScript>{m_script};
+ return true;
+ }
+};
+
+/** A parsed pk(P), pkh(P), or wpkh(P) descriptor. */
+class SingleKeyDescriptor final : public Descriptor
+{
+ const std::function<CScript(const CPubKey&)> m_script_fn;
+ const std::string m_fn_name;
+ std::unique_ptr<PubkeyProvider> m_provider;
+
+public:
+ SingleKeyDescriptor(std::unique_ptr<PubkeyProvider> prov, const std::function<CScript(const CPubKey&)>& fn, const std::string& name) : m_script_fn(fn), m_fn_name(name), m_provider(std::move(prov)) {}
+
+ bool IsRange() const override { return m_provider->IsRange(); }
+ std::string ToString() const override { return m_fn_name + "(" + m_provider->ToString() + ")"; }
+ bool ToPrivateString(const SigningProvider& arg, std::string& out) const override
+ {
+ std::string ret;
+ if (!m_provider->ToPrivateString(arg, ret)) return false;
+ out = m_fn_name + "(" + std::move(ret) + ")";
+ return true;
+ }
+ bool Expand(int pos, const SigningProvider& arg, std::vector<CScript>& output_scripts, FlatSigningProvider& out) const override
+ {
+ CPubKey key;
+ if (!m_provider->GetPubKey(pos, arg, key)) return false;
+ output_scripts = std::vector<CScript>{m_script_fn(key)};
+ out.pubkeys.emplace(key.GetID(), std::move(key));
+ return true;
+ }
+};
+
+CScript P2PKHGetScript(const CPubKey& pubkey) { return GetScriptForDestination(pubkey.GetID()); }
+CScript P2PKGetScript(const CPubKey& pubkey) { return GetScriptForRawPubKey(pubkey); }
+CScript P2WPKHGetScript(const CPubKey& pubkey) { return GetScriptForDestination(WitnessV0KeyHash(pubkey.GetID())); }
+
+/** A parsed multi(...) descriptor. */
+class MultisigDescriptor : public Descriptor
+{
+ int m_threshold;
+ std::vector<std::unique_ptr<PubkeyProvider>> m_providers;
+
+public:
+ MultisigDescriptor(int threshold, std::vector<std::unique_ptr<PubkeyProvider>> providers) : m_threshold(threshold), m_providers(std::move(providers)) {}
+
+ bool IsRange() const override
+ {
+ for (const auto& p : m_providers) {
+ if (p->IsRange()) return true;
+ }
+ return false;
+ }
+
+ std::string ToString() const override
+ {
+ std::string ret = strprintf("multi(%i", m_threshold);
+ for (const auto& p : m_providers) {
+ ret += "," + p->ToString();
+ }
+ return std::move(ret) + ")";
+ }
+
+ bool ToPrivateString(const SigningProvider& arg, std::string& out) const override
+ {
+ std::string ret = strprintf("multi(%i", m_threshold);
+ for (const auto& p : m_providers) {
+ std::string sub;
+ if (!p->ToPrivateString(arg, sub)) return false;
+ ret += "," + std::move(sub);
+ }
+ out = std::move(ret) + ")";
+ return true;
+ }
+
+ bool Expand(int pos, const SigningProvider& arg, std::vector<CScript>& output_scripts, FlatSigningProvider& out) const override
+ {
+ std::vector<CPubKey> pubkeys;
+ pubkeys.reserve(m_providers.size());
+ for (const auto& p : m_providers) {
+ CPubKey key;
+ if (!p->GetPubKey(pos, arg, key)) return false;
+ pubkeys.push_back(key);
+ }
+ for (const CPubKey& key : pubkeys) {
+ out.pubkeys.emplace(key.GetID(), std::move(key));
+ }
+ output_scripts = std::vector<CScript>{GetScriptForMultisig(m_threshold, pubkeys)};
+ return true;
+ }
+};
+
+/** A parsed sh(S) or wsh(S) descriptor. */
+class ConvertorDescriptor : public Descriptor
+{
+ const std::function<CScript(const CScript&)> m_convert_fn;
+ const std::string m_fn_name;
+ std::unique_ptr<Descriptor> m_descriptor;
+
+public:
+ ConvertorDescriptor(std::unique_ptr<Descriptor> descriptor, const std::function<CScript(const CScript&)>& fn, const std::string& name) : m_convert_fn(fn), m_fn_name(name), m_descriptor(std::move(descriptor)) {}
+
+ bool IsRange() const override { return m_descriptor->IsRange(); }
+ std::string ToString() const override { return m_fn_name + "(" + m_descriptor->ToString() + ")"; }
+ bool ToPrivateString(const SigningProvider& arg, std::string& out) const override
+ {
+ std::string ret;
+ if (!m_descriptor->ToPrivateString(arg, ret)) return false;
+ out = m_fn_name + "(" + std::move(ret) + ")";
+ return true;
+ }
+ bool Expand(int pos, const SigningProvider& arg, std::vector<CScript>& output_scripts, FlatSigningProvider& out) const override
+ {
+ std::vector<CScript> sub;
+ if (!m_descriptor->Expand(pos, arg, sub, out)) return false;
+ output_scripts.clear();
+ for (const auto& script : sub) {
+ CScriptID id(script);
+ out.scripts.emplace(CScriptID(script), script);
+ output_scripts.push_back(m_convert_fn(script));
+ }
+ return true;
+ }
+};
+
+CScript ConvertP2SH(const CScript& script) { return GetScriptForDestination(CScriptID(script)); }
+CScript ConvertP2WSH(const CScript& script) { return GetScriptForDestination(WitnessV0ScriptHash(script)); }
+
+/** A parsed combo(P) descriptor. */
+class ComboDescriptor final : public Descriptor
+{
+ std::unique_ptr<PubkeyProvider> m_provider;
+
+public:
+ ComboDescriptor(std::unique_ptr<PubkeyProvider> provider) : m_provider(std::move(provider)) {}
+
+ bool IsRange() const override { return m_provider->IsRange(); }
+ std::string ToString() const override { return "combo(" + m_provider->ToString() + ")"; }
+ bool ToPrivateString(const SigningProvider& arg, std::string& out) const override
+ {
+ std::string ret;
+ if (!m_provider->ToPrivateString(arg, ret)) return false;
+ out = "combo(" + std::move(ret) + ")";
+ return true;
+ }
+ bool Expand(int pos, const SigningProvider& arg, std::vector<CScript>& output_scripts, FlatSigningProvider& out) const override
+ {
+ CPubKey key;
+ if (!m_provider->GetPubKey(pos, arg, key)) return false;
+ CKeyID keyid = key.GetID();
+ {
+ CScript p2pk = GetScriptForRawPubKey(key);
+ CScript p2pkh = GetScriptForDestination(keyid);
+ output_scripts = std::vector<CScript>{std::move(p2pk), std::move(p2pkh)};
+ out.pubkeys.emplace(keyid, key);
+ }
+ if (key.IsCompressed()) {
+ CScript p2wpkh = GetScriptForDestination(WitnessV0KeyHash(keyid));
+ CScriptID p2wpkh_id(p2wpkh);
+ CScript p2sh_p2wpkh = GetScriptForDestination(p2wpkh_id);
+ out.scripts.emplace(p2wpkh_id, p2wpkh);
+ output_scripts.push_back(std::move(p2wpkh));
+ output_scripts.push_back(std::move(p2sh_p2wpkh));
+ }
+ return true;
+ }
+};
+
+////////////////////////////////////////////////////////////////////////////
+// Parser //
+////////////////////////////////////////////////////////////////////////////
+
+enum class ParseScriptContext {
+ TOP,
+ P2SH,
+ P2WSH,
+};
+
+/** Parse a constant. If succesful, sp is updated to skip the constant and return true. */
+bool Const(const std::string& str, Span<const char>& sp)
+{
+ if ((size_t)sp.size() >= str.size() && std::equal(str.begin(), str.end(), sp.begin())) {
+ sp = sp.subspan(str.size());
+ return true;
+ }
+ return false;
+}
+
+/** Parse a function call. If succesful, sp is updated to be the function's argument(s). */
+bool Func(const std::string& str, Span<const char>& sp)
+{
+ if ((size_t)sp.size() >= str.size() + 2 && sp[str.size()] == '(' && sp[sp.size() - 1] == ')' && std::equal(str.begin(), str.end(), sp.begin())) {
+ sp = sp.subspan(str.size() + 1, sp.size() - str.size() - 2);
+ return true;
+ }
+ return false;
+}
+
+/** Return the expression that sp begins with, and update sp to skip it. */
+Span<const char> Expr(Span<const char>& sp)
+{
+ int level = 0;
+ auto it = sp.begin();
+ while (it != sp.end()) {
+ if (*it == '(') {
+ ++level;
+ } else if (level && *it == ')') {
+ --level;
+ } else if (level == 0 && (*it == ')' || *it == ',')) {
+ break;
+ }
+ ++it;
+ }
+ Span<const char> ret = sp.first(it - sp.begin());
+ sp = sp.subspan(it - sp.begin());
+ return ret;
+}
+
+/** Split a string on every instance of sep, returning a vector. */
+std::vector<Span<const char>> Split(const Span<const char>& sp, char sep)
+{
+ std::vector<Span<const char>> ret;
+ auto it = sp.begin();
+ auto start = it;
+ while (it != sp.end()) {
+ if (*it == sep) {
+ ret.emplace_back(start, it);
+ start = it + 1;
+ }
+ ++it;
+ }
+ ret.emplace_back(start, it);
+ return ret;
+}
+
+/** Parse a key path, being passed a split list of elements (the first element is ignored). */
+bool ParseKeyPath(const std::vector<Span<const char>>& split, KeyPath& out)
+{
+ for (size_t i = 1; i < split.size(); ++i) {
+ Span<const char> elem = split[i];
+ bool hardened = false;
+ if (elem.size() > 0 && (elem[elem.size() - 1] == '\'' || elem[elem.size() - 1] == 'h')) {
+ elem = elem.first(elem.size() - 1);
+ hardened = true;
+ }
+ uint32_t p;
+ if (!ParseUInt32(std::string(elem.begin(), elem.end()), &p) || p > 0x7FFFFFFFUL) return false;
+ out.push_back(p | (((uint32_t)hardened) << 31));
+ }
+ return true;
+}
+
+std::unique_ptr<PubkeyProvider> ParsePubkey(const Span<const char>& sp, bool permit_uncompressed, FlatSigningProvider& out)
+{
+ auto split = Split(sp, '/');
+ std::string str(split[0].begin(), split[0].end());
+ if (split.size() == 1) {
+ if (IsHex(str)) {
+ std::vector<unsigned char> data = ParseHex(str);
+ CPubKey pubkey(data);
+ if (pubkey.IsFullyValid() && (permit_uncompressed || pubkey.IsCompressed())) return MakeUnique<ConstPubkeyProvider>(pubkey);
+ }
+ CKey key = DecodeSecret(str);
+ if (key.IsValid() && (permit_uncompressed || key.IsCompressed())) {
+ CPubKey pubkey = key.GetPubKey();
+ out.keys.emplace(pubkey.GetID(), key);
+ return MakeUnique<ConstPubkeyProvider>(pubkey);
+ }
+ }
+ CExtKey extkey = DecodeExtKey(str);
+ CExtPubKey extpubkey = DecodeExtPubKey(str);
+ if (!extkey.key.IsValid() && !extpubkey.pubkey.IsValid()) return nullptr;
+ KeyPath path;
+ DeriveType type = DeriveType::NO;
+ if (split.back() == MakeSpan("*").first(1)) {
+ split.pop_back();
+ type = DeriveType::UNHARDENED;
+ } else if (split.back() == MakeSpan("*'").first(2) || split.back() == MakeSpan("*h").first(2)) {
+ split.pop_back();
+ type = DeriveType::HARDENED;
+ }
+ if (!ParseKeyPath(split, path)) return nullptr;
+ if (extkey.key.IsValid()) {
+ extpubkey = extkey.Neuter();
+ out.keys.emplace(extpubkey.pubkey.GetID(), extkey.key);
+ }
+ return MakeUnique<BIP32PubkeyProvider>(extpubkey, std::move(path), type);
+}
+
+/** Parse a script in a particular context. */
+std::unique_ptr<Descriptor> ParseScript(Span<const char>& sp, ParseScriptContext ctx, FlatSigningProvider& out)
+{
+ auto expr = Expr(sp);
+ if (Func("pk", expr)) {
+ auto pubkey = ParsePubkey(expr, ctx != ParseScriptContext::P2WSH, out);
+ if (!pubkey) return nullptr;
+ return MakeUnique<SingleKeyDescriptor>(std::move(pubkey), P2PKGetScript, "pk");
+ }
+ if (Func("pkh", expr)) {
+ auto pubkey = ParsePubkey(expr, ctx != ParseScriptContext::P2WSH, out);
+ if (!pubkey) return nullptr;
+ return MakeUnique<SingleKeyDescriptor>(std::move(pubkey), P2PKHGetScript, "pkh");
+ }
+ if (ctx == ParseScriptContext::TOP && Func("combo", expr)) {
+ auto pubkey = ParsePubkey(expr, true, out);
+ if (!pubkey) return nullptr;
+ return MakeUnique<ComboDescriptor>(std::move(pubkey));
+ }
+ if (Func("multi", expr)) {
+ auto threshold = Expr(expr);
+ uint32_t thres;
+ std::vector<std::unique_ptr<PubkeyProvider>> providers;
+ if (!ParseUInt32(std::string(threshold.begin(), threshold.end()), &thres)) return nullptr;
+ size_t script_size = 0;
+ while (expr.size()) {
+ if (!Const(",", expr)) return nullptr;
+ auto arg = Expr(expr);
+ auto pk = ParsePubkey(arg, ctx != ParseScriptContext::P2WSH, out);
+ if (!pk) return nullptr;
+ script_size += pk->GetSize() + 1;
+ providers.emplace_back(std::move(pk));
+ }
+ if (providers.size() < 1 || providers.size() > 16 || thres < 1 || thres > providers.size()) return nullptr;
+ if (ctx == ParseScriptContext::TOP) {
+ if (providers.size() > 3) return nullptr; // Not more than 3 pubkeys for raw multisig
+ }
+ if (ctx == ParseScriptContext::P2SH) {
+ if (script_size + 3 > 520) return nullptr; // Enforce P2SH script size limit
+ }
+ return MakeUnique<MultisigDescriptor>(thres, std::move(providers));
+ }
+ if (ctx != ParseScriptContext::P2WSH && Func("wpkh", expr)) {
+ auto pubkey = ParsePubkey(expr, false, out);
+ if (!pubkey) return nullptr;
+ return MakeUnique<SingleKeyDescriptor>(std::move(pubkey), P2WPKHGetScript, "wpkh");
+ }
+ if (ctx == ParseScriptContext::TOP && Func("sh", expr)) {
+ auto desc = ParseScript(expr, ParseScriptContext::P2SH, out);
+ if (!desc || expr.size()) return nullptr;
+ return MakeUnique<ConvertorDescriptor>(std::move(desc), ConvertP2SH, "sh");
+ }
+ if (ctx != ParseScriptContext::P2WSH && Func("wsh", expr)) {
+ auto desc = ParseScript(expr, ParseScriptContext::P2WSH, out);
+ if (!desc || expr.size()) return nullptr;
+ return MakeUnique<ConvertorDescriptor>(std::move(desc), ConvertP2WSH, "wsh");
+ }
+ if (ctx == ParseScriptContext::TOP && Func("addr", expr)) {
+ CTxDestination dest = DecodeDestination(std::string(expr.begin(), expr.end()));
+ if (!IsValidDestination(dest)) return nullptr;
+ return MakeUnique<AddressDescriptor>(std::move(dest));
+ }
+ if (ctx == ParseScriptContext::TOP && Func("raw", expr)) {
+ std::string str(expr.begin(), expr.end());
+ if (!IsHex(str)) return nullptr;
+ auto bytes = ParseHex(str);
+ return MakeUnique<RawDescriptor>(CScript(bytes.begin(), bytes.end()));
+ }
+ return nullptr;
+}
+
+} // namespace
+
+std::unique_ptr<Descriptor> Parse(const std::string& descriptor, FlatSigningProvider& out)
+{
+ Span<const char> sp(descriptor.data(), descriptor.size());
+ auto ret = ParseScript(sp, ParseScriptContext::TOP, out);
+ if (sp.size() == 0 && ret) return ret;
+ return nullptr;
+}
diff --git a/src/script/descriptor.h b/src/script/descriptor.h
new file mode 100644
index 000000000..e079c72e9
--- /dev/null
+++ b/src/script/descriptor.h
@@ -0,0 +1,102 @@
+// Copyright (c) 2018 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_SCRIPT_DESCRIPTOR_H
+#define BITCOIN_SCRIPT_DESCRIPTOR_H
+
+#include <script/script.h>
+#include <script/sign.h>
+
+#include <vector>
+
+// Descriptors are strings that describe a set of scriptPubKeys, together with
+// all information necessary to solve them. By combining all information into
+// one, they avoid the need to separately import keys and scripts.
+//
+// Descriptors may be ranged, which occurs when the public keys inside are
+// specified in the form of HD chains (xpubs).
+//
+// Descriptors always represent public information - public keys and scripts -
+// but in cases where private keys need to be conveyed along with a descriptor,
+// they can be included inside by changing public keys to private keys (WIF
+// format), and changing xpubs by xprvs.
+//
+// 1. Examples
+//
+// A P2PK descriptor with a fixed public key:
+// - pk(0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798)
+//
+// A P2SH-P2WSH-P2PKH descriptor with a fixed public key:
+// - sh(wsh(pkh(02e493dbf1c10d80f3581e4904930b1404cc6c13900ee0758474fa94abe8c4cd13)))
+//
+// A bare 1-of-2 multisig descriptor:
+// - multi(1,022f8bde4d1a07209355b4a7250a5c5128e88b84bddc619ab7cba8d569b240efe4,025cbdf0646e5db4eaa398f365f2ea7a0e3d419b7e0330e39ce92bddedcac4f9bc)
+//
+// A chain of P2PKH outputs (this needs the corresponding private key to derive):
+// - pkh(xpub68Gmy5EdvgibQVfPdqkBBCHxA5htiqg55crXYuXoQRKfDBFA1WEjWgP6LHhwBZeNK1VTsfTFUHCdrfp1bgwQ9xv5ski8PX9rL2dZXvgGDnw/1'/2/*)
+//
+// 2. Grammar description:
+//
+// X: xpub or xprv encoded extended key
+// I: decimal encoded integer
+// H: Hex encoded byte array
+// A: Address in P2PKH, P2SH, or Bech32 encoding
+//
+// S (Scripts):
+// * pk(P): Pay-to-pubkey (P2PK) output for public key P.
+// * pkh(P): Pay-to-pubkey-hash (P2PKH) output for public key P.
+// * wpkh(P): Pay-to-witness-pubkey-hash (P2WPKH) output for public key P.
+// * sh(S): Pay-to-script-hash (P2SH) output for script S
+// * wsh(S): Pay-to-witness-script-hash (P2WSH) output for script S
+// * combo(P): combination of P2PK, P2PKH, P2WPKH, and P2SH-P2WPKH for public key P.
+// * multi(I,L): k-of-n multisig for given public keys
+// * addr(A): Output to address
+// * raw(H): scriptPubKey with raw bytes
+//
+// P (Public keys):
+// * H: fixed public key (or WIF-encoded private key)
+// * E: extended public key
+// * E/*: (ranged) all unhardened direct children of an extended public key
+// * E/*': (ranged) all hardened direct children of an extended public key
+//
+// L (Comma-separated lists of public keys):
+// * P
+// * L,P
+//
+// E (Extended public keys):
+// * X
+// * E/I: unhardened child
+// * E/I': hardened child
+// * E/Ih: hardened child (alternative notation)
+//
+// The top level is S.
+
+/** Interface for parsed descriptor objects. */
+struct Descriptor {
+ virtual ~Descriptor() = default;
+
+ /** Whether the expansion of this descriptor depends on the position. */
+ virtual bool IsRange() const = 0;
+
+ /** Convert the descriptor back to a string, undoing parsing. */
+ virtual std::string ToString() const = 0;
+
+ /** Convert the descriptor to a private string. This fails if the provided provider does not have the relevant private keys. */
+ virtual bool ToPrivateString(const SigningProvider& provider, std::string& out) const = 0;
+
+ /** Expand a descriptor at a specified position.
+ *
+ * pos: the position at which to expand the descriptor. If IsRange() is false, this is ignored.
+ * provider: the provider to query for private keys in case of hardened derivation.
+ * output_script: the expanded scriptPubKeys will be put here.
+ * out: scripts and public keys necessary for solving the expanded scriptPubKeys will be put here (may be equal to provider).
+ */
+ virtual bool Expand(int pos, const SigningProvider& provider, std::vector<CScript>& output_scripts, FlatSigningProvider& out) const = 0;
+};
+
+/** Parse a descriptor string. Included private keys are put in out. Returns nullptr if parsing fails. */
+std::unique_ptr<Descriptor> Parse(const std::string& descriptor, FlatSigningProvider& out);
+
+#endif // BITCOIN_SCRIPT_DESCRIPTOR_H
+
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
index 4b982d647..95b25b491 100644
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
@@ -99,7 +99,7 @@ bool static IsCompressedPubKey(const valtype &vchPubKey) {
* Where R and S are not negative (their first byte has its highest bit not set), and not
* excessively padded (do not start with a 0 byte, unless an otherwise negative number follows,
* in which case a single 0 byte is necessary and even required).
- *
+ *
* See https://bitcointalk.org/index.php?topic=8392.msg127623#msg127623
*
* This function is consensus-critical since BIP66.
@@ -139,7 +139,7 @@ bool static IsValidSignatureEncoding(const std::vector<unsigned char> &sig) {
// Verify that the length of the signature matches the sum of the length
// of the elements.
if ((size_t)(lenR + lenS + 7) != sig.size()) return false;
-
+
// Check whether the R element is an integer.
if (sig[2] != 0x02) return false;
@@ -899,7 +899,7 @@ bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript&
popstack(stack);
stack.push_back(vchHash);
}
- break;
+ break;
case OP_CODESEPARATOR:
{
@@ -1588,7 +1588,7 @@ bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const C
return set_success(serror);
}
-size_t static WitnessSigOps(int witversion, const std::vector<unsigned char>& witprogram, const CScriptWitness& witness, int flags)
+size_t static WitnessSigOps(int witversion, const std::vector<unsigned char>& witprogram, const CScriptWitness& witness)
{
if (witversion == 0) {
if (witprogram.size() == WITNESS_V0_KEYHASH_SIZE)
@@ -1616,7 +1616,7 @@ size_t CountWitnessSigOps(const CScript& scriptSig, const CScript& scriptPubKey,
int witnessversion;
std::vector<unsigned char> witnessprogram;
if (scriptPubKey.IsWitnessProgram(witnessversion, witnessprogram)) {
- return WitnessSigOps(witnessversion, witnessprogram, witness ? *witness : witnessEmpty, flags);
+ return WitnessSigOps(witnessversion, witnessprogram, witness ? *witness : witnessEmpty);
}
if (scriptPubKey.IsPayToScriptHash() && scriptSig.IsPushOnly()) {
@@ -1628,7 +1628,7 @@ size_t CountWitnessSigOps(const CScript& scriptSig, const CScript& scriptPubKey,
}
CScript subscript(data.begin(), data.end());
if (subscript.IsWitnessProgram(witnessversion, witnessprogram)) {
- return WitnessSigOps(witnessversion, witnessprogram, witness ? *witness : witnessEmpty, flags);
+ return WitnessSigOps(witnessversion, witnessprogram, witness ? *witness : witnessEmpty);
}
}
diff --git a/src/script/interpreter.h b/src/script/interpreter.h
index 2d21aa81d..276ff9a58 100644
--- a/src/script/interpreter.h
+++ b/src/script/interpreter.h
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/script/ismine.cpp b/src/script/ismine.cpp
index 7e7087663..1433ebf42 100644
--- a/src/script/ismine.cpp
+++ b/src/script/ismine.cpp
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/script/ismine.h b/src/script/ismine.h
index 4246da49f..601e70f70 100644
--- a/src/script/ismine.h
+++ b/src/script/ismine.h
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/script/script.cpp b/src/script/script.cpp
index c84c7b8ec..9bdf3ed80 100644
--- a/src/script/script.cpp
+++ b/src/script/script.cpp
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/script/script.h b/src/script/script.h
index a4f377dd9..00065a24b 100644
--- a/src/script/script.h
+++ b/src/script/script.h
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/script/script_error.cpp b/src/script/script_error.cpp
index ceda74058..9d7deffc7 100644
--- a/src/script/script_error.cpp
+++ b/src/script/script_error.cpp
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/script/script_error.h b/src/script/script_error.h
index 6982a087f..400f63ff0 100644
--- a/src/script/script_error.h
+++ b/src/script/script_error.h
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2016 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/script/sigcache.cpp b/src/script/sigcache.cpp
index 9638b12f9..68f054229 100644
--- a/src/script/sigcache.cpp
+++ b/src/script/sigcache.cpp
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/script/sigcache.h b/src/script/sigcache.h
index 1309d57cc..807b61b54 100644
--- a/src/script/sigcache.h
+++ b/src/script/sigcache.h
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index f0090800a..23af1bd97 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
@@ -11,7 +11,6 @@
#include <script/standard.h>
#include <uint256.h>
-
typedef std::vector<unsigned char> valtype;
MutableTransactionSignatureCreator::MutableTransactionSignatureCreator(const CMutableTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, int nHashTypeIn) : txTo(txToIn), nIn(nInIn), nHashType(nHashTypeIn), amount(amountIn), checker(txTo, nIn, amountIn) {}
@@ -244,17 +243,33 @@ bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& t
input.FillSignatureData(sigdata);
// Get UTXO
+ bool require_witness_sig = false;
CTxOut utxo;
if (input.non_witness_utxo) {
+ // If we're taking our information from a non-witness UTXO, verify that it matches the prevout.
+ if (input.non_witness_utxo->GetHash() != tx.vin[index].prevout.hash) return false;
+ // If both witness and non-witness UTXO are provided, verify that they match. This check shouldn't
+ // matter, as the PSBT deserializer enforces only one of both is provided, and the only way both
+ // can be present is when they're added simultaneously by FillPSBT (in which case they always match).
+ // Still, check in order to not rely on callers to enforce this.
+ if (!input.witness_utxo.IsNull() && input.non_witness_utxo->vout[tx.vin[index].prevout.n] != input.witness_utxo) return false;
utxo = input.non_witness_utxo->vout[tx.vin[index].prevout.n];
} else if (!input.witness_utxo.IsNull()) {
utxo = input.witness_utxo;
+ // When we're taking our information from a witness UTXO, we can't verify it is actually data from
+ // the output being spent. This is safe in case a witness signature is produced (which includes this
+ // information directly in the hash), but not for non-witness signatures. Remember that we require
+ // a witness signature in this situation.
+ require_witness_sig = true;
} else {
return false;
}
MutableTransactionSignatureCreator creator(&tx, index, utxo.nValue, sighash);
+ sigdata.witness = false;
bool sig_complete = ProduceSignature(provider, creator, utxo.scriptPubKey, sigdata);
+ // Verify that a witness signature was produced in case one was required.
+ if (require_witness_sig && !sigdata.witness) return false;
input.FromSignatureData(sigdata);
return sig_complete;
}
@@ -416,28 +431,44 @@ public:
const DummySignatureChecker DUMMY_CHECKER;
class DummySignatureCreator final : public BaseSignatureCreator {
+private:
+ char m_r_len = 32;
+ char m_s_len = 32;
public:
- DummySignatureCreator() {}
+ DummySignatureCreator(char r_len, char s_len) : m_r_len(r_len), m_s_len(s_len) {}
const BaseSignatureChecker& Checker() const override { return DUMMY_CHECKER; }
bool CreateSig(const SigningProvider& provider, std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode, SigVersion sigversion) const override
{
// Create a dummy signature that is a valid DER-encoding
- vchSig.assign(72, '\000');
+ vchSig.assign(m_r_len + m_s_len + 7, '\000');
vchSig[0] = 0x30;
- vchSig[1] = 69;
+ vchSig[1] = m_r_len + m_s_len + 4;
vchSig[2] = 0x02;
- vchSig[3] = 33;
+ vchSig[3] = m_r_len;
vchSig[4] = 0x01;
- vchSig[4 + 33] = 0x02;
- vchSig[5 + 33] = 32;
- vchSig[6 + 33] = 0x01;
- vchSig[6 + 33 + 32] = SIGHASH_ALL;
+ vchSig[4 + m_r_len] = 0x02;
+ vchSig[5 + m_r_len] = m_s_len;
+ vchSig[6 + m_r_len] = 0x01;
+ vchSig[6 + m_r_len + m_s_len] = SIGHASH_ALL;
return true;
}
};
+
+template<typename M, typename K, typename V>
+bool LookupHelper(const M& map, const K& key, V& value)
+{
+ auto it = map.find(key);
+ if (it != map.end()) {
+ value = it->second;
+ return true;
+ }
+ return false;
}
-const BaseSignatureCreator& DUMMY_SIGNATURE_CREATOR = DummySignatureCreator();
+}
+
+const BaseSignatureCreator& DUMMY_SIGNATURE_CREATOR = DummySignatureCreator(32, 32);
+const BaseSignatureCreator& DUMMY_MAXIMUM_SIGNATURE_CREATOR = DummySignatureCreator(33, 32);
const SigningProvider& DUMMY_SIGNING_PROVIDER = SigningProvider();
bool IsSolvable(const SigningProvider& provider, const CScript& script)
@@ -452,13 +483,13 @@ bool IsSolvable(const SigningProvider& provider, const CScript& script)
static_assert(STANDARD_SCRIPT_VERIFY_FLAGS & SCRIPT_VERIFY_WITNESS_PUBKEYTYPE, "IsSolvable requires standard script flags to include WITNESS_PUBKEYTYPE");
if (ProduceSignature(provider, DUMMY_SIGNATURE_CREATOR, script, sigs)) {
// VerifyScript check is just defensive, and should never fail.
- assert(VerifyScript(sigs.scriptSig, script, &sigs.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, DUMMY_CHECKER));
+ bool verified = VerifyScript(sigs.scriptSig, script, &sigs.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, DUMMY_CHECKER);
+ assert(verified);
return true;
}
return false;
}
-
bool PartiallySignedTransaction::IsNull() const
{
return !tx && inputs.empty() && outputs.empty() && unknown.empty();
@@ -472,6 +503,7 @@ void PartiallySignedTransaction::Merge(const PartiallySignedTransaction& psbt)
for (unsigned int i = 0; i < outputs.size(); ++i) {
outputs[i].Merge(psbt.outputs[i]);
}
+ unknown.insert(psbt.unknown.begin(), psbt.unknown.end());
}
bool PartiallySignedTransaction::IsSane() const
@@ -615,3 +647,19 @@ bool PublicOnlySigningProvider::GetPubKey(const CKeyID &address, CPubKey& pubkey
{
return m_provider->GetPubKey(address, pubkey);
}
+
+bool FlatSigningProvider::GetCScript(const CScriptID& scriptid, CScript& script) const { return LookupHelper(scripts, scriptid, script); }
+bool FlatSigningProvider::GetPubKey(const CKeyID& keyid, CPubKey& pubkey) const { return LookupHelper(pubkeys, keyid, pubkey); }
+bool FlatSigningProvider::GetKey(const CKeyID& keyid, CKey& key) const { return LookupHelper(keys, keyid, key); }
+
+FlatSigningProvider Merge(const FlatSigningProvider& a, const FlatSigningProvider& b)
+{
+ FlatSigningProvider ret;
+ ret.scripts = a.scripts;
+ ret.scripts.insert(b.scripts.begin(), b.scripts.end());
+ ret.pubkeys = a.pubkeys;
+ ret.pubkeys.insert(b.pubkeys.begin(), b.pubkeys.end());
+ ret.keys = a.keys;
+ ret.keys.insert(b.keys.begin(), b.keys.end());
+ return ret;
+}
diff --git a/src/script/sign.h b/src/script/sign.h
index e3a6196b2..7ade715ee 100644
--- a/src/script/sign.h
+++ b/src/script/sign.h
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
@@ -43,6 +43,19 @@ public:
bool GetPubKey(const CKeyID &address, CPubKey& pubkey) const;
};
+struct FlatSigningProvider final : public SigningProvider
+{
+ std::map<CScriptID, CScript> scripts;
+ std::map<CKeyID, CPubKey> pubkeys;
+ std::map<CKeyID, CKey> keys;
+
+ bool GetCScript(const CScriptID& scriptid, CScript& script) const override;
+ bool GetPubKey(const CKeyID& keyid, CPubKey& pubkey) const override;
+ bool GetKey(const CKeyID& keyid, CKey& key) const override;
+};
+
+FlatSigningProvider Merge(const FlatSigningProvider& a, const FlatSigningProvider& b);
+
/** Interface for signature creators. */
class BaseSignatureCreator {
public:
@@ -67,8 +80,10 @@ public:
bool CreateSig(const SigningProvider& provider, std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode, SigVersion sigversion) const override;
};
-/** A signature creator that just produces 72-byte empty signatures. */
+/** A signature creator that just produces 71-byte empty signatures. */
extern const BaseSignatureCreator& DUMMY_SIGNATURE_CREATOR;
+/** A signature creator that just produces 72-byte empty signatures. */
+extern const BaseSignatureCreator& DUMMY_MAXIMUM_SIGNATURE_CREATOR;
typedef std::pair<CPubKey, std::vector<unsigned char>> SigPair;
@@ -116,26 +131,24 @@ static constexpr uint8_t PSBT_OUT_BIP32_DERIVATION = 0x02;
// as a 0 length key which indicates that this is the separator. The separator has no value.
static constexpr uint8_t PSBT_SEPARATOR = 0x00;
-// Takes a stream and multiple arguments and serializes them into a vector and then into the stream
+// Takes a stream and multiple arguments and serializes them as if first serialized into a vector and then into the stream
// The resulting output into the stream has the total serialized length of all of the objects followed by all objects concatenated with each other.
template<typename Stream, typename... X>
void SerializeToVector(Stream& s, const X&... args)
{
- std::vector<unsigned char> ret;
- CVectorWriter ss(SER_NETWORK, PROTOCOL_VERSION, ret, 0);
- SerializeMany(ss, args...);
- s << ret;
+ WriteCompactSize(s, GetSerializeSizeMany(s, args...));
+ SerializeMany(s, args...);
}
// Takes a stream and multiple arguments and unserializes them first as a vector then each object individually in the order provided in the arguments
template<typename Stream, typename... X>
void UnserializeFromVector(Stream& s, X&... args)
{
- std::vector<unsigned char> data;
- s >> data;
- CDataStream ss(data, SER_NETWORK, PROTOCOL_VERSION);
- UnserializeMany(ss, args...);
- if (!ss.eof()) {
+ size_t expected_size = ReadCompactSize(s);
+ size_t remaining_before = s.size();
+ UnserializeMany(s, args...);
+ size_t remaining_after = s.size();
+ if (remaining_after + expected_size != remaining_before) {
throw std::ios_base::failure("Size of value was not the stated size");
}
}
@@ -210,7 +223,8 @@ struct PSBTInput
// If there is a non-witness utxo, then don't add the witness one.
if (non_witness_utxo) {
SerializeToVector(s, PSBT_IN_NON_WITNESS_UTXO);
- SerializeToVector(s, non_witness_utxo);
+ OverrideStream<Stream> os(&s, s.GetType(), s.GetVersion() | SERIALIZE_TRANSACTION_NO_WITNESS);
+ SerializeToVector(os, non_witness_utxo);
} else if (!witness_utxo.IsNull()) {
SerializeToVector(s, PSBT_IN_WITNESS_UTXO);
SerializeToVector(s, witness_utxo);
@@ -284,14 +298,22 @@ struct PSBTInput
// Do stuff based on type
switch(type) {
case PSBT_IN_NON_WITNESS_UTXO:
+ {
if (non_witness_utxo) {
throw std::ios_base::failure("Duplicate Key, input non-witness utxo already provided");
+ } else if (key.size() != 1) {
+ throw std::ios_base::failure("Non-witness utxo key is more than one byte type");
}
- UnserializeFromVector(s, non_witness_utxo);
+ // Set the stream to unserialize with witness since this is always a valid network transaction
+ OverrideStream<Stream> os(&s, s.GetType(), s.GetVersion() & ~SERIALIZE_TRANSACTION_NO_WITNESS);
+ UnserializeFromVector(os, non_witness_utxo);
break;
+ }
case PSBT_IN_WITNESS_UTXO:
if (!witness_utxo.IsNull()) {
throw std::ios_base::failure("Duplicate Key, input witness utxo already provided");
+ } else if (key.size() != 1) {
+ throw std::ios_base::failure("Witness utxo key is more than one byte type");
}
UnserializeFromVector(s, witness_utxo);
break;
@@ -321,6 +343,8 @@ struct PSBTInput
case PSBT_IN_SIGHASH:
if (sighash_type > 0) {
throw std::ios_base::failure("Duplicate Key, input sighash type already provided");
+ } else if (key.size() != 1) {
+ throw std::ios_base::failure("Sighash type key is more than one byte type");
}
UnserializeFromVector(s, sighash_type);
break;
@@ -328,6 +352,8 @@ struct PSBTInput
{
if (!redeem_script.empty()) {
throw std::ios_base::failure("Duplicate Key, input redeemScript already provided");
+ } else if (key.size() != 1) {
+ throw std::ios_base::failure("Input redeemScript key is more than one byte type");
}
s >> redeem_script;
break;
@@ -336,6 +362,8 @@ struct PSBTInput
{
if (!witness_script.empty()) {
throw std::ios_base::failure("Duplicate Key, input witnessScript already provided");
+ } else if (key.size() != 1) {
+ throw std::ios_base::failure("Input witnessScript key is more than one byte type");
}
s >> witness_script;
break;
@@ -349,6 +377,8 @@ struct PSBTInput
{
if (!final_script_sig.empty()) {
throw std::ios_base::failure("Duplicate Key, input final scriptSig already provided");
+ } else if (key.size() != 1) {
+ throw std::ios_base::failure("Final scriptSig key is more than one byte type");
}
s >> final_script_sig;
break;
@@ -357,6 +387,8 @@ struct PSBTInput
{
if (!final_script_witness.IsNull()) {
throw std::ios_base::failure("Duplicate Key, input final scriptWitness already provided");
+ } else if (key.size() != 1) {
+ throw std::ios_base::failure("Final scriptWitness key is more than one byte type");
}
UnserializeFromVector(s, final_script_witness.stack);
break;
@@ -444,6 +476,8 @@ struct PSBTOutput
{
if (!redeem_script.empty()) {
throw std::ios_base::failure("Duplicate Key, output redeemScript already provided");
+ } else if (key.size() != 1) {
+ throw std::ios_base::failure("Output redeemScript key is more than one byte type");
}
s >> redeem_script;
break;
@@ -452,6 +486,8 @@ struct PSBTOutput
{
if (!witness_script.empty()) {
throw std::ios_base::failure("Duplicate Key, output witnessScript already provided");
+ } else if (key.size() != 1) {
+ throw std::ios_base::failure("Output witnessScript key is more than one byte type");
}
s >> witness_script;
break;
@@ -516,7 +552,8 @@ struct PartiallySignedTransaction
SerializeToVector(s, PSBT_GLOBAL_UNSIGNED_TX);
// Write serialized tx to a stream
- SerializeToVector(s, *tx);
+ OverrideStream<Stream> os(&s, s.GetType(), s.GetVersion() | SERIALIZE_TRANSACTION_NO_WITNESS);
+ SerializeToVector(os, *tx);
// Write the unknown things
for (auto& entry : unknown) {
@@ -566,9 +603,13 @@ struct PartiallySignedTransaction
{
if (tx) {
throw std::ios_base::failure("Duplicate Key, unsigned tx already provided");
+ } else if (key.size() != 1) {
+ throw std::ios_base::failure("Global unsigned tx key is more than one byte type");
}
CMutableTransaction mtx;
- UnserializeFromVector(s, mtx);
+ // Set the stream to serialize with non-witness since this should always be non-witness
+ OverrideStream<Stream> os(&s, s.GetType(), s.GetVersion() | SERIALIZE_TRANSACTION_NO_WITNESS);
+ UnserializeFromVector(os, mtx);
tx = std::move(mtx);
// Make sure that all scriptSigs and scriptWitnesses are empty
for (const CTxIn& txin : tx->vin) {
@@ -645,7 +686,7 @@ bool ProduceSignature(const SigningProvider& provider, const BaseSignatureCreato
bool SignSignature(const SigningProvider &provider, const CScript& fromPubKey, CMutableTransaction& txTo, unsigned int nIn, const CAmount& amount, int nHashType);
bool SignSignature(const SigningProvider &provider, const CTransaction& txFrom, CMutableTransaction& txTo, unsigned int nIn, int nHashType);
-/** Signs a PSBTInput */
+/** Signs a PSBTInput, verifying that all provided data matches what is being signed. */
bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& tx, PSBTInput& input, SignatureData& sigdata, int index, int sighash = 1);
/** Extract signature data from a transaction input, and insert it. */
diff --git a/src/script/standard.cpp b/src/script/standard.cpp
index d309420d3..08ba1b1e0 100644
--- a/src/script/standard.cpp
+++ b/src/script/standard.cpp
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
diff --git a/src/script/standard.h b/src/script/standard.h
index 4728b056d..fc20fb6a0 100644
--- a/src/script/standard.h
+++ b/src/script/standard.h
@@ -1,5 +1,5 @@
// Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2017 The Bitcoin Core developers
+// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
generated by cgit v1.2.3 (git 2.25.1) at 2026-04-30 14:55:16 +0000