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For non-Taproot signatures, this is interpreted as SIGHASH_ALL.
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This provides a means to pass in a PrecomputedTransactionData object to
the MutableTransactionSignatureCreator, allowing the prevout data to be
passed into the signature hashers. It is also more efficient.
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725d7ae0494d4a45f5a840bbbd19c008a7363965 Use PrecomputedTransactionData in signet check (Pieter Wuille)
497718b467330b2c6bb0d44786020c55f1aa75f9 Treat amount<0 also as missing data for P2WPKH/P2WSH (Pieter Wuille)
3820090bd619ac85ab35eff376c03136fe4a9f04 Make all SignatureChecker explicit about missing data (Pieter Wuille)
b77b0cc507bdc716e5236b1d9880e648147e0af9 Add MissingDataBehavior and make TransactionSignatureChecker handle it (Pieter Wuille)
Pull request description:
Currently we have 2 levels of potentially-missing data in the transaction signature hashes:
* P2WPKH/P2WSH hashes need the spent amount
* P2TR hashes need all spent outputs (amount + scriptPubKey)
Missing amounts are treated as -1 (thus leading to unexpected signature failures), while missing outputs in P2TR validation cause assertion failure. This is hard to extend for signing support, and also quite ugly in general.
In this PR, an explicit configuration option to {Mutable,}TransactionSignatureChecker is added (MissingDataBehavior enum class) to either select ASSERT_FAIL or FAIL. Validation code passes ASSERT_FAIL (as at validation time all data should always be passed, and anything else is a serious bug in the code), while signing code uses FAIL.
The existence of the ASSERT_FAIL option is really just an abundance of caution. Always using FAIL should be just fine, but if there were for some reason a code path in consensus code was introduced that misses certain data, I think we prefer as assertion failure over silently introducing a consensus change.
Potentially useful follow-ups (not for this PR, in my preference):
* Having an explicit script validation error code for missing data.
* Having a MissingDataBehavior::SUCCEED option as well, for use in script/sign.cpp DataFromTransaction (if a signature is present in a witness, and we don't have enough data to fully validate it, we should probably treat it as valid and not touch it).
ACKs for top commit:
sanket1729:
reACK 725d7ae0494d4a45f5a840bbbd19c008a7363965
Sjors:
ACK 725d7ae0494d4a45f5a840bbbd19c008a7363965
achow101:
re-ACK 725d7ae0494d4a45f5a840bbbd19c008a7363965
benthecarman:
ACK 725d7ae0494d4a45f5a840bbbd19c008a7363965
fjahr:
Code review ACK 725d7ae0494d4a45f5a840bbbd19c008a7363965
Tree-SHA512: d67dc51bae9ca7ef6eb9acccefd682529f397830f77d74cd305500a081ef55aede0e9fa380648c3a8dd4857aa7eeb1ab54fe808979d79db0784ac94ceb31b657
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Historically lack of amount data has been treated as amount==-1. Change
this and treat it as missing data, as introduced in the previous commits.
To be minimally invasive, do this at SignatureHash() call sites rather
than inside SignatureHash() (which currently has no means or returning
a failure code).
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Remove the implicit MissingDataBehavior::ASSERT_FAIL in the
*TransationSignatureChecker constructors, and instead specify
it explicit in all call sites:
* Test code uses ASSERT_FAIL
* Validation uses ASSERT_FAIL (through CachingTransactionSignatureChecker)
(including signet)
* libconsensus uses FAIL, matching the existing behavior of the
non-amount API (and the extended required data for taproot validation
is not available yet)
* Signing code uses FAIL
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Introduces a DeferringSignatureChecker which simply takes a
BaseSignatureChecker and passes through everything.
SignatureExtractorChecker now subclasses DeferringSignatureChecker. This
allows for all BaseSignatureChecker functions to be implemented for
SignatureExtractorChecker, while allowing for future signature checkers
which opreate similarly to SignatureExtractorChecker.
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fa650ca7f19307a9237e64ac311488c8947fc12a Use -Wswitch for TxoutType where possible (MarcoFalke)
fa59e0b5bd2aed8380cc9b9e52791f662aecd6a6 test: Add missing script_standard_Solver_success cases (MarcoFalke)
Pull request description:
This removes unused `default:` cases for all `switch` statements on `TxoutType` and adds the cases (`MULTISIG`, `NULL_DATA`, `NONSTANDARD`) to `ExtractDestination` for clarity.
Also, the compiler is now able to use `-Wswitch`.
ACKs for top commit:
practicalswift:
cr ACK fa650ca7f19307a9237e64ac311488c8947fc12a: patch looks correct and `assert(false);` is better than UB :)
hebasto:
ACK fa650ca7f19307a9237e64ac311488c8947fc12a, I have reviewed the code and it looks OK, I agree it can be merged.
Tree-SHA512: 282458b6523bd8923a0c0f5c423d1db2dce2a2d1b1d1dae455415c6fc995bb41ce82c1f9b0a1c0dcc6d874d171e04c30eca585f147582f52c7048c140358630a
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This adds a `TxoutType::WITNESS_V1_TAPROOT` for P2TR outputs, and permits spending
them in standardness rules. No corresponding `CTxDestination` is added for it,
as that isn't needed until we want wallet integration. The taproot validation flags
are also enabled for mempool transactions, and standardness rules are added
(stack item size limit, no annexes).
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In preparation for adding Schnorr versions of `CheckSig`, `VerifySignature`, and
`ComputeEntry`, give them an ECDSA specific name.
-BEGIN VERIFY SCRIPT-
sed -i 's/CheckSig(/CheckECDSASignature(/g' $(git grep -l CheckSig ./src)
sed -i 's/VerifySignature(/VerifyECDSASignature(/g' $(git grep -l VerifySignature ./src)
sed -i 's/ComputeEntry(/ComputeEntryECDSA(/g' $(git grep -l ComputeEntry ./src)
-END VERIFY SCRIPT-
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Co-authored-by: Samuel Dobson <dobsonsa68@gmail.com>
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-BEGIN VERIFY SCRIPT-
# General rename helper: $1 -> $2
rename_global() { sed -i "s/\<$1\>/$2/g" $(git grep -l "$1"); }
# Helper to rename TxoutType $1
rename_value() {
sed -i "s/ TX_$1,/ $1,/g" src/script/standard.h; # First strip the prefix in the definition (header)
rename_global TX_$1 "TxoutType::$1"; # Then replace globally
}
# Change the type globally to bring it in line with the style-guide
# (clsses are UpperCamelCase)
rename_global 'enum txnouttype' 'enum class TxoutType'
rename_global 'txnouttype' 'TxoutType'
# Now rename each enum value
rename_value 'NONSTANDARD'
rename_value 'PUBKEY'
rename_value 'PUBKEYHASH'
rename_value 'SCRIPTHASH'
rename_value 'MULTISIG'
rename_value 'NULL_DATA'
rename_value 'WITNESS_V0_KEYHASH'
rename_value 'WITNESS_V0_SCRIPTHASH'
rename_value 'WITNESS_UNKNOWN'
-END VERIFY SCRIPT-
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-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
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Make sure that there are no errors set for an input after it is signed.
This is useful for when there are multiple ScriptPubKeyMans. Some may
fail to sign, but one may be able to sign, and after it does, we don't
want there to be any more errors there.
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-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./
-END VERIFY SCRIPT-
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73aaf4ecf825a4d18c802ca5dd3856ce9096915e Make SignatureExtractorChecker private to its own file (Ben Woosley)
Pull request description:
~If we add a CTxIn constructor to SignatureData, then constructing the
SignatureData directly is no more verbose than calling DataFromTransaction,
and grants the caller additional flexibiliy in how to provide the CTxIn.~
A simple change to enhance encapsulation.
ACKs for top commit:
MarcoFalke:
utACK 73aaf4ecf825a4d18c802ca5dd3856ce9096915e
laanwj:
ACK 73aaf4ecf825a4d18c802ca5dd3856ce9096915e
Tree-SHA512: f7eafbce22b0e9917a8487e88d1f5a1061f2a0959ae1a097cbd9c8ea0d774edfb807da56813cb5fb26f6ca98499a0604a8ff024c198a7c8dc755164de66d972a
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Moves all of the various SigningProviders out of sign.{cpp,h} and
keystore.{cpp,h}. As such, keystore.{cpp,h} is also removed.
Includes and the Makefile are updated to reflect this. Includes were largely
changed using:
git grep -l "keystore.h" | xargs sed -i -e 's;keystore.h;script/signingprovider.h;g'
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This is not a pure refactor; additional functionality is added in
IsSegWitOutput which lets it recurse into P2SH when a
SigningProvider is provided that knows about the inner script.
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It's only used here in DataFromTransaction
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When signing an input, figure out what was requested for but was unable
to be found and store it in a SignatureData.
Return this information in SignPSBTInput.
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Move non-wallet PSBT code to src/psbt.{h,cpp}, and PSBT wallet code to
src/wallet/psbtwallet.{h,cpp}. This commit contains only code movement (and
adjustments to includes and Makefile.am.)
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conversion.
This commit makes the minimal changes necessary to fix compilation once CTransaction(const CMutableTransaction &tx) is made explicit. In each case an explicit call `CTransaction(...)` was added. Shouldn't affect behaviour or performance.
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in CreateSig
b81a1860561ccbda3cd6913f54e49fdc91c7718c GetPubKey: make sigdata const (Gregory Sanders)
f7beb95a1f921ed292680fbd2f042b4bac73bf59 remove redundant KeyOriginInfo access, already done in CreateSig (Gregory Sanders)
Pull request description:
This redundancy is confusing as it looks like pubkeyhashes are special in some way based on where it's called.
Tree-SHA512: a980b7c774c6d69322945227a2b156489fb1991ebf57fe6f26096d5f8047f246a133debc241b05af67810f604b040079add3ab3d30d9e2928095905a2afe17eb
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6b8d86ddb8 Require a public key to be retrieved when signing a P2PKH input (Andrew Chow)
Pull request description:
If we do not have the public key for a P2PKH input, we should not continue to attempt to sign for it.
This fixes a problem where a PSBT with a P2PKH output would include invalid BIP 32 derivation paths that are missing the public key.
Tree-SHA512: 850d5e74c06833da937d5bf0348bd134180be7167b6f9b9cecbf09f75e3543fbad60d0abbc0b9afdfa51ce165aa36168849f24a7c5abf1e75f37ce8f9a13d127
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If we do not have the public key for a P2PKH input, we should not
continue to attempt to sign for it.
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Refactor the process of PSBTInput signing to enforce the invariant that
a PSBTInput always has _either_ a witness_utxo or a non_witness_utxo,
never both.
This simplifies the logic of SignPSBTInput slightly, since it no longer
has to deal with the "both" case. When calling it, we now give it, in
order of preference: (1) whichever of the utxo fields was already
present in the PSBT we received, or (2) if neither, the
non_witness_utxo field, which is just a copy of the input transaction,
which we get from the wallet.
SignPSBTInput no longer has to remove one of the two fields; instead, it
will check if we have a witness signature, and if so, it will replace
the non_witness_utxo with the witness_utxo (which is smaller, as it is
just a copy of the output being spent.)
Add PSBTInput::IsSane checks in two more places, which checks for
both utxo fields being present; we will now give an RPC error early on
if we are supplied such a malformed PSBT to fill in.
Also add a check to FillPSBT, to avoid touching any input that is
already signed. (This is now redundant, since we should no longer
potentially harm an already-signed input, but it's harmless.)
fixes #14473
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Remove redundant arguments to SignPSBTInput -- since it needs several
bits of the PartiallySignedTransaction, pass in a reference instead of
doing it piecemeal. This saves us having to pass in both a PSBTInput and
its index, as well as having to pass in the CTransaction. Also avoid
redundantly passing the sighash_type, which is contained in the
PSBTInput already.
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Refactor out a "PSBTInputSigned" function to check if a PSBT is signed,
for use in subsequent commits.
Also improve a related comment.
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New constructor that creates a PartiallySignedTransaction from a
CTransaction, automatically sizing the inputs and outputs vectors for
convenience.
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862d159d635c1de219d94e030b186a745fe28eb9 Add test for conversion from non-witness to witness UTXO (Pieter Wuille)
f8c1714634445542a16ac01d128d8ad2b2810e19 Convert non-witness UTXOs to witness if witness sig created (Andrew Chow)
Pull request description:
If a witness signature was created when a non-witness UTXO is used, convert the non-witness UTXO to a witness one.
Port of #14196 to master.
Tree-SHA512: 2235eeb008ffa48e821628032d689e4a83bff6c29b93fa050ab2ee492b0e67b3a30f29a680d4a0e574e05c3a2f9edf0005e161fbe25b7aef2acd034a2424e2f2
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If a witness signature was created when a non-witness UTXO is used,
convert the non-witness UTXO to a witness one.
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917353c8b0eff4cd95f9a5f7719f6756bb8338b1 Make SignPSBTInput operate on a private SignatureData object (Pieter Wuille)
cad5dd2368109ec398a3b79c8b9e94dfd23f0845 Pass HD path data through SignatureData (Pieter Wuille)
03a99586a398ee38f40c3b72d24c6a2ba4b88579 Implement key origin lookup in CWallet (Pieter Wuille)
3b01efa0d1bf3d23d1b7b7e518849f1fc26314f9 [MOVEONLY] Move ParseHDKeypath to utilstrencodings (Pieter Wuille)
81e1dd5ce1a32114a38691ec6b55e72ab04dbbb1 Generalize PublicOnlySigningProvider into HidingSigningProvider (Pieter Wuille)
84f1f1bfdf900cd28099e428441aa42f9d11a0ed Make SigningProvider expose key origin information (Pieter Wuille)
611ab307fbd8b6f8f7ffc1d569bb86d1f9cb4e92 Introduce KeyOriginInfo for fingerprint + path (Pieter Wuille)
Pull request description:
This PR adds "key origin" (master fingeprint + key path) information to what is exposed from `SigningProvider`s, allowing this information to be used by the generic PSBT code instead of having the RPC pull it directly from the wallet.
This is also a preparation to having PSBT interact with output descriptors, which can then directly expose key origin information for the scripts they generate.
Tree-SHA512: c718382ba8ba2d6fc9a32c062bd4cff08b6f39b133838aa03115c39aeca0f654c7cc3ec72d87005bf8306e550824cd8eb9d60f0bd41784a3e22e17b2afcfe833
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984d72ec659361d8c1a6f3c6864e839a807817a7 Return the script type from Solver (Ben Woosley)
Pull request description:
Because false is synonymous with TX_NONSTANDARD, this conveys the same
information and makes the handling explicitly based on script type,
simplifying each call site.
Prior to this change it was common for the return value to be ignored, or for the
return value and TX_NONSTANDARD to be redundantly handled.
Tree-SHA512: 31864f856b8cb75f4b782d12678070e8b1cfe9665c6f57cfb25e7ac8bcea8a22f9a78d7c8cf0101c841f2a612400666fb91798bffe88de856e98b873703b0965
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