1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
// Copyright (c) 2009-2010 Satoshi Nakamoto
// 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.
#include <keystore.h>
#include <util/system.h>
void FillableSigningProvider::ImplicitlyLearnRelatedKeyScripts(const CPubKey& pubkey)
{
AssertLockHeld(cs_KeyStore);
CKeyID key_id = pubkey.GetID();
// We must actually know about this key already.
assert(HaveKey(key_id) || mapWatchKeys.count(key_id));
// This adds the redeemscripts necessary to detect P2WPKH and P2SH-P2WPKH
// outputs. Technically P2WPKH outputs don't have a redeemscript to be
// spent. However, our current IsMine logic requires the corresponding
// P2SH-P2WPKH redeemscript to be present in the wallet in order to accept
// payment even to P2WPKH outputs.
// Also note that having superfluous scripts in the keystore never hurts.
// They're only used to guide recursion in signing and IsMine logic - if
// a script is present but we can't do anything with it, it has no effect.
// "Implicitly" refers to fact that scripts are derived automatically from
// existing keys, and are present in memory, even without being explicitly
// loaded (e.g. from a file).
if (pubkey.IsCompressed()) {
CScript script = GetScriptForDestination(WitnessV0KeyHash(key_id));
// This does not use AddCScript, as it may be overridden.
CScriptID id(script);
mapScripts[id] = std::move(script);
}
}
bool FillableSigningProvider::GetPubKey(const CKeyID &address, CPubKey &vchPubKeyOut) const
{
CKey key;
if (!GetKey(address, key)) {
LOCK(cs_KeyStore);
WatchKeyMap::const_iterator it = mapWatchKeys.find(address);
if (it != mapWatchKeys.end()) {
vchPubKeyOut = it->second;
return true;
}
return false;
}
vchPubKeyOut = key.GetPubKey();
return true;
}
bool FillableSigningProvider::AddKeyPubKey(const CKey& key, const CPubKey &pubkey)
{
LOCK(cs_KeyStore);
mapKeys[pubkey.GetID()] = key;
ImplicitlyLearnRelatedKeyScripts(pubkey);
return true;
}
bool FillableSigningProvider::HaveKey(const CKeyID &address) const
{
LOCK(cs_KeyStore);
return mapKeys.count(address) > 0;
}
std::set<CKeyID> FillableSigningProvider::GetKeys() const
{
LOCK(cs_KeyStore);
std::set<CKeyID> set_address;
for (const auto& mi : mapKeys) {
set_address.insert(mi.first);
}
return set_address;
}
bool FillableSigningProvider::GetKey(const CKeyID &address, CKey &keyOut) const
{
LOCK(cs_KeyStore);
KeyMap::const_iterator mi = mapKeys.find(address);
if (mi != mapKeys.end()) {
keyOut = mi->second;
return true;
}
return false;
}
bool FillableSigningProvider::AddCScript(const CScript& redeemScript)
{
if (redeemScript.size() > MAX_SCRIPT_ELEMENT_SIZE)
return error("FillableSigningProvider::AddCScript(): redeemScripts > %i bytes are invalid", MAX_SCRIPT_ELEMENT_SIZE);
LOCK(cs_KeyStore);
mapScripts[CScriptID(redeemScript)] = redeemScript;
return true;
}
bool FillableSigningProvider::HaveCScript(const CScriptID& hash) const
{
LOCK(cs_KeyStore);
return mapScripts.count(hash) > 0;
}
std::set<CScriptID> FillableSigningProvider::GetCScripts() const
{
LOCK(cs_KeyStore);
std::set<CScriptID> set_script;
for (const auto& mi : mapScripts) {
set_script.insert(mi.first);
}
return set_script;
}
bool FillableSigningProvider::GetCScript(const CScriptID &hash, CScript& redeemScriptOut) const
{
LOCK(cs_KeyStore);
ScriptMap::const_iterator mi = mapScripts.find(hash);
if (mi != mapScripts.end())
{
redeemScriptOut = (*mi).second;
return true;
}
return false;
}
static bool ExtractPubKey(const CScript &dest, CPubKey& pubKeyOut)
{
//TODO: Use Solver to extract this?
CScript::const_iterator pc = dest.begin();
opcodetype opcode;
std::vector<unsigned char> vch;
if (!dest.GetOp(pc, opcode, vch) || !CPubKey::ValidSize(vch))
return false;
pubKeyOut = CPubKey(vch);
if (!pubKeyOut.IsFullyValid())
return false;
if (!dest.GetOp(pc, opcode, vch) || opcode != OP_CHECKSIG || dest.GetOp(pc, opcode, vch))
return false;
return true;
}
bool FillableSigningProvider::AddWatchOnly(const CScript &dest)
{
LOCK(cs_KeyStore);
setWatchOnly.insert(dest);
CPubKey pubKey;
if (ExtractPubKey(dest, pubKey)) {
mapWatchKeys[pubKey.GetID()] = pubKey;
ImplicitlyLearnRelatedKeyScripts(pubKey);
}
return true;
}
bool FillableSigningProvider::RemoveWatchOnly(const CScript &dest)
{
LOCK(cs_KeyStore);
setWatchOnly.erase(dest);
CPubKey pubKey;
if (ExtractPubKey(dest, pubKey)) {
mapWatchKeys.erase(pubKey.GetID());
}
// Related CScripts are not removed; having superfluous scripts around is
// harmless (see comment in ImplicitlyLearnRelatedKeyScripts).
return true;
}
bool FillableSigningProvider::HaveWatchOnly(const CScript &dest) const
{
LOCK(cs_KeyStore);
return setWatchOnly.count(dest) > 0;
}
bool FillableSigningProvider::HaveWatchOnly() const
{
LOCK(cs_KeyStore);
return (!setWatchOnly.empty());
}
CKeyID GetKeyForDestination(const FillableSigningProvider& store, const CTxDestination& dest)
{
// Only supports destinations which map to single public keys, i.e. P2PKH,
// P2WPKH, and P2SH-P2WPKH.
if (auto id = boost::get<PKHash>(&dest)) {
return CKeyID(*id);
}
if (auto witness_id = boost::get<WitnessV0KeyHash>(&dest)) {
return CKeyID(*witness_id);
}
if (auto script_hash = boost::get<ScriptHash>(&dest)) {
CScript script;
CScriptID script_id(*script_hash);
CTxDestination inner_dest;
if (store.GetCScript(script_id, script) && ExtractDestination(script, inner_dest)) {
if (auto inner_witness_id = boost::get<WitnessV0KeyHash>(&inner_dest)) {
return CKeyID(*inner_witness_id);
}
}
}
return CKeyID();
}
|