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Fix ismine and addwitnessaddress: no uncompressed keys in segwit

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Github-Pull: #8499
Rebased-From: 248f3a76a825a332e5495c5947ad283a9e5e938f
This commit is contained in:
Pieter Wuille
2016-10-17 00:32:36 +08:00
committed by Wladimir J. van der Laan
parent 908fced296
commit 4ec21e8a64
3 changed files with 76 additions and 16 deletions
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64
src/script/ismine.cpp
View File

@@ -29,13 +29,25 @@ unsigned int HaveKeys(const vector<valtype>& pubkeys, const CKeyStore& keystore)
return nResult;
}
isminetype IsMine(const CKeyStore &keystore, const CTxDestination& dest)
isminetype IsMine(const CKeyStore& keystore, const CScript& scriptPubKey, SigVersion sigversion)
{
CScript script = GetScriptForDestination(dest);
return IsMine(keystore, script);
bool isInvalid = false;
return IsMine(keystore, scriptPubKey, isInvalid, sigversion);
}
isminetype IsMine(const CKeyStore &keystore, const CScript& scriptPubKey)
isminetype IsMine(const CKeyStore& keystore, const CTxDestination& dest, SigVersion sigversion)
{
bool isInvalid = false;
return IsMine(keystore, dest, isInvalid, sigversion);
}
isminetype IsMine(const CKeyStore &keystore, const CTxDestination& dest, bool& isInvalid, SigVersion sigversion)
{
CScript script = GetScriptForDestination(dest);
return IsMine(keystore, script, isInvalid, sigversion);
}
isminetype IsMine(const CKeyStore &keystore, const CScript& scriptPubKey, bool& isInvalid, SigVersion sigversion)
{
vector<valtype> vSolutions;
txnouttype whichType;
@@ -53,12 +65,35 @@ isminetype IsMine(const CKeyStore &keystore, const CScript& scriptPubKey)
break;
case TX_PUBKEY:
keyID = CPubKey(vSolutions[0]).GetID();
if (sigversion != SIGVERSION_BASE && vSolutions[0].size() != 33) {
isInvalid = true;
return ISMINE_NO;
}
if (keystore.HaveKey(keyID))
return ISMINE_SPENDABLE;
break;
case TX_PUBKEYHASH:
case TX_WITNESS_V0_KEYHASH:
{
if (!keystore.HaveCScript(CScriptID(CScript() << OP_0 << vSolutions[0]))) {
// We do not support bare witness outputs unless the P2SH version of it would be
// acceptable as well. This protects against matching before segwit activates.
// This also applies to the P2WSH case.
break;
}
isminetype ret = ::IsMine(keystore, GetScriptForDestination(CKeyID(uint160(vSolutions[0]))), isInvalid, SIGVERSION_WITNESS_V0);
if (ret == ISMINE_SPENDABLE || ret == ISMINE_WATCH_SOLVABLE || (ret == ISMINE_NO && isInvalid))
return ret;
break;
}
case TX_PUBKEYHASH:
keyID = CKeyID(uint160(vSolutions[0]));
if (sigversion != SIGVERSION_BASE) {
CPubKey pubkey;
if (keystore.GetPubKey(keyID, pubkey) && !pubkey.IsCompressed()) {
isInvalid = true;
return ISMINE_NO;
}
}
if (keystore.HaveKey(keyID))
return ISMINE_SPENDABLE;
break;
@@ -67,21 +102,24 @@ isminetype IsMine(const CKeyStore &keystore, const CScript& scriptPubKey)
CScriptID scriptID = CScriptID(uint160(vSolutions[0]));
CScript subscript;
if (keystore.GetCScript(scriptID, subscript)) {
isminetype ret = IsMine(keystore, subscript);
if (ret == ISMINE_SPENDABLE)
isminetype ret = IsMine(keystore, subscript, isInvalid);
if (ret == ISMINE_SPENDABLE || ret == ISMINE_WATCH_SOLVABLE || (ret == ISMINE_NO && isInvalid))
return ret;
}
break;
}
case TX_WITNESS_V0_SCRIPTHASH:
{
if (!keystore.HaveCScript(CScriptID(CScript() << OP_0 << vSolutions[0]))) {
break;
}
uint160 hash;
CRIPEMD160().Write(&vSolutions[0][0], vSolutions[0].size()).Finalize(hash.begin());
CScriptID scriptID = CScriptID(hash);
CScript subscript;
if (keystore.GetCScript(scriptID, subscript)) {
isminetype ret = IsMine(keystore, subscript);
if (ret == ISMINE_SPENDABLE)
isminetype ret = IsMine(keystore, subscript, isInvalid, SIGVERSION_WITNESS_V0);
if (ret == ISMINE_SPENDABLE || ret == ISMINE_WATCH_SOLVABLE || (ret == ISMINE_NO && isInvalid))
return ret;
}
break;
@@ -95,6 +133,14 @@ isminetype IsMine(const CKeyStore &keystore, const CScript& scriptPubKey)
// them) enable spend-out-from-under-you attacks, especially
// in shared-wallet situations.
vector<valtype> keys(vSolutions.begin()+1, vSolutions.begin()+vSolutions.size()-1);
if (sigversion != SIGVERSION_BASE) {
for (size_t i = 0; i < keys.size(); i++) {
if (keys[i].size() != 33) {
isInvalid = true;
return ISMINE_NO;
}
}
}
if (HaveKeys(keys, keystore) == keys.size())
return ISMINE_SPENDABLE;
break;

11
src/script/ismine.h
View File

@@ -28,7 +28,14 @@ enum isminetype
/** used for bitflags of isminetype */
typedef uint8_t isminefilter;
isminetype IsMine(const CKeyStore& keystore, const CScript& scriptPubKey);
isminetype IsMine(const CKeyStore& keystore, const CTxDestination& dest);
/* isInvalid becomes true when the script is found invalid by consensus or policy. This will terminate the recursion
* and return a ISMINE_NO immediately, as an invalid script should never be considered as "mine". This is needed as
* different SIGVERSION may have different network rules. Currently the only use of isInvalid is indicate uncompressed
* keys in SIGVERSION_WITNESS_V0 script, but could also be used in similar cases in the future
*/
isminetype IsMine(const CKeyStore& keystore, const CScript& scriptPubKey, bool& isInvalid, SigVersion = SIGVERSION_BASE);
isminetype IsMine(const CKeyStore& keystore, const CScript& scriptPubKey, SigVersion = SIGVERSION_BASE);
isminetype IsMine(const CKeyStore& keystore, const CTxDestination& dest, bool& isInvalid, SigVersion = SIGVERSION_BASE);
isminetype IsMine(const CKeyStore& keystore, const CTxDestination& dest, SigVersion = SIGVERSION_BASE);
#endif // BITCOIN_SCRIPT_ISMINE_H