Decred sighash and signing.
This commit is contained in:
tecnovert
parent
150caeec40
commit
ab472c04be
@ -18,7 +18,6 @@ from basicswap.interface import (
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Curves)
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from basicswap.util import (
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ensure,
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make_int,
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b2h, i2b, b2i, i2h)
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from basicswap.util.ecc import (
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ep,
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@ -763,7 +762,7 @@ class BTCInterface(Secp256k1Interface):
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for pi in tx.vin:
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ptx = self.rpc('getrawtransaction', [i2h(pi.prevout.hash), True])
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prevout = ptx['vout'][pi.prevout.n]
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inputs_value += make_int(prevout['value'])
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inputs_value += self.make_int(prevout['value'])
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prevout_type = prevout['scriptPubKey']['type']
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if prevout_type == 'witness_v0_keyhash':
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@ -930,25 +929,25 @@ class BTCInterface(Secp256k1Interface):
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return True
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def signTx(self, key_bytes, tx_bytes, input_n, prevout_script, prevout_value):
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def signTx(self, key_bytes: bytes, tx_bytes: bytes, input_n: int, prevout_script: bytes, prevout_value: int) -> bytes:
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tx = self.loadTx(tx_bytes)
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sig_hash = SegwitV0SignatureHash(prevout_script, tx, input_n, SIGHASH_ALL, prevout_value)
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eck = PrivateKey(key_bytes)
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return eck.sign(sig_hash, hasher=None) + bytes((SIGHASH_ALL,))
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def signTxOtVES(self, key_sign, pubkey_encrypt, tx_bytes, input_n, prevout_script, prevout_value):
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def signTxOtVES(self, key_sign: bytes, pubkey_encrypt: bytes, tx_bytes: bytes, input_n: int, prevout_script: bytes, prevout_value: int) -> bytes:
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tx = self.loadTx(tx_bytes)
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sig_hash = SegwitV0SignatureHash(prevout_script, tx, input_n, SIGHASH_ALL, prevout_value)
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return ecdsaotves_enc_sign(key_sign, pubkey_encrypt, sig_hash)
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def verifyTxOtVES(self, tx_bytes, ct, Ks, Ke, input_n, prevout_script, prevout_value):
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def verifyTxOtVES(self, tx_bytes: bytes, ct: bytes, Ks: bytes, Ke: bytes, input_n: int, prevout_script: bytes, prevout_value):
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tx = self.loadTx(tx_bytes)
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sig_hash = SegwitV0SignatureHash(prevout_script, tx, input_n, SIGHASH_ALL, prevout_value)
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return ecdsaotves_enc_verify(Ks, Ke, sig_hash, ct)
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def decryptOtVES(self, k, esig):
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def decryptOtVES(self, k: bytes, esig: bytes) -> bytes:
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return ecdsaotves_dec_sig(k, esig) + bytes((SIGHASH_ALL,))
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def verifyTxSig(self, tx_bytes: bytes, sig: bytes, K: bytes, input_n: int, prevout_script: bytes, prevout_value: int) -> bool:
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@ -19,8 +19,91 @@ from basicswap.util.crypto import (
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ripemd160,
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)
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from basicswap.util.extkey import ExtKeyPair
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from basicswap.util.integer import encode_varint
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from basicswap.interface.dcr.rpc import make_rpc_func
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from .messages import CTransaction
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from .messages import CTransaction, SigHashType, TxSerializeType
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from .script import push_script_data
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from coincurve.keys import (
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PrivateKey
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)
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SigHashSerializePrefix: int = 1
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SigHashSerializeWitness: int = 3
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def DCRSignatureHash(sign_script: bytes, hash_type: SigHashType, tx: CTransaction, idx: int) -> bytes:
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masked_hash_type = hash_type & SigHashType.SigHashMask
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if masked_hash_type != SigHashType.SigHashAll:
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raise ValueError('todo')
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# Prefix hash
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sign_tx_in_idx: int = idx
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sign_vins = tx.vin
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if hash_type & SigHashType.SigHashAnyOneCanPay != 0:
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sign_vins = [tx.vin[idx],]
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sign_tx_in_idx = 0
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hash_buffer = bytearray()
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version: int = tx.version | (SigHashSerializePrefix << 16)
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hash_buffer += version.to_bytes(4, 'little')
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hash_buffer += encode_varint(len(sign_vins))
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for txi_n, txi in enumerate(sign_vins):
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hash_buffer += txi.prevout.hash.to_bytes(32, 'little')
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hash_buffer += txi.prevout.n.to_bytes(4, 'little')
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hash_buffer += txi.prevout.tree.to_bytes(1)
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# In the case of SigHashNone and SigHashSingle, commit to 0 for everything that is not the input being signed instead.
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if (masked_hash_type == SigHashType.SigHashNone
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or masked_hash_type == SigHashType.SigHashSingle) and \
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sign_tx_in_idx != txi_n:
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hash_buffer += (0).to_bytes(4, 'little')
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else:
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hash_buffer += txi.sequence.to_bytes(4, 'little')
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hash_buffer += encode_varint(len(tx.vout))
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for txo_n, txo in enumerate(tx.vout):
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if masked_hash_type == SigHashType.SigHashSingle and \
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idx != txo_n:
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hash_buffer += (-1).to_bytes(8, 'little')
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hash_buffer += txo.version.to_bytes(2, 'little')
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hash_buffer += encode_varint(0)
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continue
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hash_buffer += txo.value.to_bytes(8, 'little')
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hash_buffer += txo.version.to_bytes(2, 'little')
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hash_buffer += encode_varint(len(txo.script_pubkey))
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hash_buffer += txo.script_pubkey
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hash_buffer += tx.locktime.to_bytes(4, 'little')
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hash_buffer += tx.expiry.to_bytes(4, 'little')
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prefix_hash = blake256(hash_buffer)
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# Witness hash
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hash_buffer.clear()
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version: int = tx.version | (SigHashSerializeWitness << 16)
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hash_buffer += version.to_bytes(4, 'little')
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hash_buffer += encode_varint(len(sign_vins))
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for txi_n, txi in enumerate(sign_vins):
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if sign_tx_in_idx != txi_n:
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hash_buffer += encode_varint(0)
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continue
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hash_buffer += encode_varint(len(sign_script))
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hash_buffer += sign_script
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witness_hash = blake256(hash_buffer)
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hash_buffer.clear()
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hash_buffer += hash_type.to_bytes(4, 'little')
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hash_buffer += prefix_hash
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hash_buffer += witness_hash
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return blake256(hash_buffer)
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class DCRInterface(Secp256k1Interface):
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@ -121,7 +204,38 @@ class DCRInterface(Secp256k1Interface):
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return hash160(ek_account.encode_p())
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def decodeKey(self, encoded_key: str) -> (int, bytes):
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key = b58decode(encoded_key)
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checksum = key[-4:]
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key = key[:-4]
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if blake256(key)[:4] != checksum:
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raise ValueError('Checksum mismatch')
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return key[2], key[3:]
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def loadTx(self, tx_bytes: bytes) -> CTransaction:
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tx = CTransaction()
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tx.deserialize(tx_bytes)
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return tx
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def signTx(self, key_bytes: bytes, tx_bytes: bytes, input_n: int, prevout_script: bytes, prevout_value: int) -> bytes:
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tx = self.loadTx(tx_bytes)
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sig_hash = DCRSignatureHash(prevout_script, SigHashType.SigHashAll, tx, input_n)
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eck = PrivateKey(key_bytes)
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return eck.sign(sig_hash, hasher=None) + bytes((SigHashType.SigHashAll,))
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def setTxSignature(self, tx_bytes: bytes, stack, txi: int = 0) -> bytes:
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tx = self.loadTx(tx_bytes)
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script_data = bytearray()
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for data in stack:
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push_script_data(script_data, data)
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tx.vin[txi].signature_script = script_data
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return tx.serialize()
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def stripTxSignature(self, tx_bytes) -> bytes:
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tx = self.loadTx(tx_bytes)
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return tx.serialize(TxSerializeType.NoWitness)
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@ -17,14 +17,37 @@ class TxSerializeType(IntEnum):
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OnlyWitness = 2
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class SigHashType(IntEnum):
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SigHashAll = 0x1
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SigHashNone = 0x2
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SigHashSingle = 0x3
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SigHashAnyOneCanPay = 0x80
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SigHashMask = 0x1f
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class SignatureType(IntEnum):
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STEcdsaSecp256k1 = 0
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STEd25519 = 1
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STSchnorrSecp256k1 = 2
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class COutpoint:
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__slots__ = ('hash', 'n', 'tree')
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def get_hash(self) -> bytes:
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return self.hash.to_bytes(32, 'big')
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class CTxIn:
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__slots__ = ('prevout', 'sequence',
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'value_in', 'block_height', 'block_index', 'signature_script') # Witness
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def __init__(self, tx=None):
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self.value_in = -1
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self.block_height = 0
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self.block_index = 0xffffffff
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class CTxOut:
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__slots__ = ('value', 'version', 'script_pubkey')
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@ -47,7 +70,6 @@ class CTransaction:
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self.locktime = tx.locktime
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self.expiry = tx.expiry
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def deserialize(self, data: bytes) -> None:
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version = int.from_bytes(data[:4], 'little')
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@ -92,6 +114,9 @@ class CTransaction:
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self.expiry = int.from_bytes(data[o:o + 4], 'little')
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o += 4
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if ser_type == TxSerializeType.NoWitness:
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return
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num_wit_scripts, nb = decode_varint(data, o)
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o += nb
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@ -140,7 +165,8 @@ class CTransaction:
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if ser_type == TxSerializeType.Full or ser_type == TxSerializeType.OnlyWitness:
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data += encode_varint(len(self.vin))
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for txi in self.vin:
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data += txi.value_in.to_bytes(8, 'little')
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tc_value_in = txi.value_in & 0xffffffffffffffff # Convert negative values
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data += tc_value_in.to_bytes(8, 'little')
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data += txi.block_height.to_bytes(4, 'little')
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data += txi.block_index.to_bytes(4, 'little')
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data += encode_varint(len(txi.signature_script))
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39
basicswap/interface/dcr/script.py
Normal file
39
basicswap/interface/dcr/script.py
Normal file
@ -0,0 +1,39 @@
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# -*- coding: utf-8 -*-
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# Copyright (c) 2024 tecnovert
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# Distributed under the MIT software license, see the accompanying
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# file LICENSE or http://www.opensource.org/licenses/mit-license.php.
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OP_0 = 0x00
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OP_DATA_1 = 0x01
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OP_1NEGATE = 0x4f
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OP_1 = 0x51
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OP_PUSHDATA1 = 0x4c
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OP_PUSHDATA2 = 0x4d
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OP_PUSHDATA4 = 0x4e
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def push_script_data(data_array: bytearray, data: bytes) -> None:
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len_data: int = len(data)
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if len_data == 0 or (len_data == 1 and data[0] == 0):
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data_array += bytes((OP_0,))
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return
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if len_data == 1 and data[0] <= 16:
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data_array += bytes((OP_1 - 1 + data[0],))
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return
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if len_data == 1 and data[0] == 0x81:
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data_array += bytes((OP_1NEGATE,))
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return
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if len_data < OP_PUSHDATA1:
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data_array += bytes(((OP_DATA_1 - 1) + len_data,))
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elif len_data <= 0xff:
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data_array += bytes((OP_PUSHDATA1, len_data))
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elif len_data <= 0xffff:
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data_array += bytes((OP_PUSHDATA2,)) + len_data.to_bytes(2, 'little')
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else:
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data_array += bytes((OP_PUSHDATA4,)) + len_data.to_bytes(4, 'little')
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data_array += data
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@ -7,9 +7,6 @@
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from .btc import BTCInterface
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from basicswap.chainparams import Coins
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from basicswap.util import (
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make_int,
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)
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class NMCInterface(BTCInterface):
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@ -26,7 +23,7 @@ class NMCInterface(BTCInterface):
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if txid and o['txid'] != txid.hex():
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continue
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# Verify amount
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if make_int(o['amount']) != int(bid_amount):
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if self.make_int(o['amount']) != int(bid_amount):
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self._log.warning('Found output to lock tx address of incorrect value: %s, %s', str(o['amount']), o['txid'])
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continue
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@ -18,7 +18,6 @@ from basicswap.contrib.test_framework.script import (
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)
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from basicswap.util import (
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ensure,
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make_int,
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TemporaryError,
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)
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from basicswap.util.script import (
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@ -345,7 +344,7 @@ class PARTInterfaceBlind(PARTInterface):
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ensure(lock_output_n is not None, 'Output not found in tx')
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# Check value
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locked_txo_value = make_int(blinded_info['amount'])
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locked_txo_value = self.make_int(blinded_info['amount'])
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ensure(locked_txo_value == swap_value, 'Bad locked value')
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# Check script
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@ -359,7 +358,7 @@ class PARTInterfaceBlind(PARTInterface):
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# TODO: Check that inputs are unspent, rangeproofs and commitments sum
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# Verify fee rate
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vsize = lock_tx_obj['vsize']
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fee_paid = make_int(lock_tx_obj['vout'][0]['ct_fee'])
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fee_paid = self.make_int(lock_tx_obj['vout'][0]['ct_fee'])
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fee_rate_paid = fee_paid * 1000 // vsize
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@ -394,7 +393,7 @@ class PARTInterfaceBlind(PARTInterface):
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lock_refund_output_n, blinded_info = self.findOutputByNonce(lock_refund_tx_obj, nonce)
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ensure(lock_refund_output_n is not None, 'Output not found in tx')
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lock_refund_txo_value = make_int(blinded_info['amount'])
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lock_refund_txo_value = self.make_int(blinded_info['amount'])
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# Check script
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lock_refund_txo_scriptpk = bytes.fromhex(lock_refund_tx_obj['vout'][lock_refund_output_n]['scriptPubKey']['hex'])
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@ -415,7 +414,7 @@ class PARTInterfaceBlind(PARTInterface):
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ensure(rv['inputs_valid'] is True, 'Invalid inputs')
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# Check value
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fee_paid = make_int(lock_refund_tx_obj['vout'][0]['ct_fee'])
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fee_paid = self.make_int(lock_refund_tx_obj['vout'][0]['ct_fee'])
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ensure(swap_value - lock_refund_txo_value == fee_paid, 'Bad output value')
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# Check fee rate
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@ -463,7 +462,7 @@ class PARTInterfaceBlind(PARTInterface):
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dummy_witness_stack = self.getScriptLockRefundSpendTxDummyWitness(prevout_script)
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witness_bytes = self.getWitnessStackSerialisedLength(dummy_witness_stack)
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vsize = self.getTxVSize(self.loadTx(tx_bytes), add_witness_bytes=witness_bytes)
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fee_paid = make_int(lock_refund_spend_tx_obj['vout'][0]['ct_fee'])
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fee_paid = self.make_int(lock_refund_spend_tx_obj['vout'][0]['ct_fee'])
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fee_rate_paid = fee_paid * 1000 // vsize
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ensure(self.compareFeeRates(fee_rate_paid, feerate), 'Bad fee rate, expected: {}'.format(feerate))
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@ -527,7 +526,7 @@ class PARTInterfaceBlind(PARTInterface):
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rv = self.rpc_wallet('fundrawtransactionfrom', ['blind', lock_spend_tx_hex, inputs_info, outputs_info, options])
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lock_spend_tx_hex = rv['hex']
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lock_spend_tx_obj = self.rpc('decoderawtransaction', [lock_spend_tx_hex])
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pay_fee = make_int(lock_spend_tx_obj['vout'][0]['ct_fee'])
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pay_fee = self.make_int(lock_spend_tx_obj['vout'][0]['ct_fee'])
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# lock_spend_tx_hex does not include the dummy witness stack
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witness_bytes = self.getWitnessStackSerialisedLength(dummy_witness_stack)
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@ -599,8 +598,8 @@ class PARTInterfaceBlind(PARTInterface):
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ensure(rv['inputs_valid'] is True, 'Invalid inputs')
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# Check amount
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fee_paid = make_int(lock_spend_tx_obj['vout'][0]['ct_fee'])
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amount_difference = make_int(input_blinded_info['amount']) - make_int(output_blinded_info['amount'])
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fee_paid = self.make_int(lock_spend_tx_obj['vout'][0]['ct_fee'])
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amount_difference = self.make_int(input_blinded_info['amount']) - self.make_int(output_blinded_info['amount'])
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ensure(fee_paid == amount_difference, 'Invalid output amount')
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# Check fee
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@ -703,7 +702,7 @@ class PARTInterfaceBlind(PARTInterface):
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assert (tx['outputs'][0]['stealth_address'] == sx_addr) # Should not be possible
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ensure(tx['outputs'][0]['type'] == 'blind', 'Output is not anon')
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if make_int(tx['outputs'][0]['amount']) == cb_swap_value:
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if self.make_int(tx['outputs'][0]['amount']) == cb_swap_value:
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height = 0
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if tx['confirmations'] > 0:
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chain_height = self.rpc('getblockcount')
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@ -741,7 +740,7 @@ class PARTInterfaceBlind(PARTInterface):
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raise ValueError('Too many spendable outputs')
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utxo = utxos[0]
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utxo_sats = make_int(utxo['amount'])
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utxo_sats = self.make_int(utxo['amount'])
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if spend_actual_balance and utxo_sats != cb_swap_value:
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self._log.warning('Spending actual balance {}, not swap value {}.'.format(utxo_sats, cb_swap_value))
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@ -841,7 +840,7 @@ class PARTInterfaceAnon(PARTInterface):
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assert (tx['outputs'][0]['stealth_address'] == sx_addr) # Should not be possible
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ensure(tx['outputs'][0]['type'] == 'anon', 'Output is not anon')
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if make_int(tx['outputs'][0]['amount']) == cb_swap_value:
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if self.make_int(tx['outputs'][0]['amount']) == cb_swap_value:
|
||||
height = 0
|
||||
if tx['confirmations'] > 0:
|
||||
chain_height = self.rpc('getblockcount')
|
||||
@ -874,7 +873,7 @@ class PARTInterfaceAnon(PARTInterface):
|
||||
raise ValueError('Too many spendable outputs')
|
||||
|
||||
utxo = autxos[0]
|
||||
utxo_sats = make_int(utxo['amount'])
|
||||
utxo_sats = self.make_int(utxo['amount'])
|
||||
|
||||
if spend_actual_balance and utxo_sats != cb_swap_value:
|
||||
self._log.warning('Spending actual balance {}, not swap value {}.'.format(utxo_sats, cb_swap_value))
|
||||
|
||||
@ -30,7 +30,6 @@ from basicswap.util import (
|
||||
i2b, b2i, b2h,
|
||||
dumpj,
|
||||
ensure,
|
||||
make_int,
|
||||
TemporaryError)
|
||||
from basicswap.util.network import (
|
||||
is_private_ip_address)
|
||||
@ -490,7 +489,7 @@ class XMRInterface(CoinInterface):
|
||||
return {'num_txns': len(rv['fee_list']), 'sum_amount': sum(rv['amount_list']), 'sum_fee': sum(rv['fee_list']), 'sum_weight': sum(rv['weight_list'])}
|
||||
return rv['tx_hash_list'][0]
|
||||
|
||||
value_sats: int = make_int(value, self.exp())
|
||||
value_sats: int = self.make_int(value)
|
||||
params = {'destinations': [{'amount': value_sats, 'address': addr_to}], 'do_not_relay': estimate_fee}
|
||||
if self._fee_priority > 0:
|
||||
params['priority'] = self._fee_priority
|
||||
|
||||
@ -16,10 +16,16 @@ import basicswap.config as cfg
|
||||
from basicswap.basicswap import (
|
||||
Coins,
|
||||
)
|
||||
from basicswap.util.crypto import hash160
|
||||
from basicswap.util.crypto import (
|
||||
hash160
|
||||
)
|
||||
from basicswap.interface.dcr.rpc import (
|
||||
callrpc,
|
||||
)
|
||||
from basicswap.interface.dcr.messages import (
|
||||
SigHashType,
|
||||
TxSerializeType,
|
||||
)
|
||||
from tests.basicswap.common import (
|
||||
stopDaemons,
|
||||
waitForRPC,
|
||||
@ -146,7 +152,7 @@ class Test(BaseTest):
|
||||
if num_passed >= 5:
|
||||
ci0.rpc('generate', [1,])
|
||||
except Exception as e:
|
||||
logging.warning('coins_loop generate {}'.format(e))
|
||||
logging.warning('coins_loop generate {}'.format(e))
|
||||
|
||||
@classmethod
|
||||
def prepareExtraDataDir(cls, i):
|
||||
@ -256,7 +262,6 @@ class Test(BaseTest):
|
||||
logging.info('---------- Test {} segwit'.format(self.test_coin_from.name))
|
||||
|
||||
swap_clients = self.swap_clients
|
||||
|
||||
ci0 = swap_clients[0].ci(self.test_coin_from)
|
||||
assert (ci0.using_segwit() is True)
|
||||
|
||||
@ -285,6 +290,53 @@ class Test(BaseTest):
|
||||
assert (ser_out.hex() == sfrtx['hex'])
|
||||
assert (f_decoded['txid'] == ctx.TxHash().hex())
|
||||
|
||||
def test_003_signature_hash(self):
|
||||
logging.info('---------- Test {} signature_hash'.format(self.test_coin_from.name))
|
||||
# Test that signing a transaction manually produces the same result when signed with the wallet
|
||||
|
||||
swap_clients = self.swap_clients
|
||||
ci0 = swap_clients[0].ci(self.test_coin_from)
|
||||
|
||||
utxos = ci0.rpc_wallet('listunspent')
|
||||
addr_out = ci0.rpc_wallet('getnewaddress')
|
||||
rtx = ci0.rpc_wallet('createrawtransaction', [[], {addr_out: 2.0}])
|
||||
|
||||
account_from = ci0.rpc_wallet('getaccount', [self.dcr_mining_addr, ])
|
||||
frtx = ci0.rpc_wallet('fundrawtransaction', [rtx, account_from])
|
||||
sfrtx = ci0.rpc_wallet('signrawtransaction', [frtx['hex']])
|
||||
|
||||
ctx = ci0.loadTx(bytes.fromhex(frtx['hex']))
|
||||
|
||||
prevout = None
|
||||
prevout_txid = ctx.vin[0].prevout.get_hash().hex()
|
||||
prevout_n = ctx.vin[0].prevout.n
|
||||
for utxo in utxos:
|
||||
if prevout_txid == utxo['txid'] and prevout_n == utxo['vout']:
|
||||
prevout = utxo
|
||||
break
|
||||
assert (prevout is not None)
|
||||
|
||||
tx_bytes_no_witness: bytes = ctx.serialize(TxSerializeType.NoWitness)
|
||||
sig0 = ci0.rpc_wallet('createsignature', [prevout['address'], 0, SigHashType.SigHashAll, prevout['scriptPubKey'], tx_bytes_no_witness.hex()])
|
||||
|
||||
priv_key_wif = ci0.rpc_wallet('dumpprivkey', [prevout['address'], ])
|
||||
sig_type, key_bytes = ci0.decodeKey(priv_key_wif)
|
||||
|
||||
addr_info = ci0.rpc_wallet('validateaddress', [prevout['address'],])
|
||||
pk_hex: str = addr_info['pubkey']
|
||||
|
||||
sig0_py = ci0.signTx(key_bytes, tx_bytes_no_witness, 0, bytes.fromhex(prevout['scriptPubKey']), ci0.make_int(prevout['amount']))
|
||||
tx_bytes_signed = ci0.setTxSignature(tx_bytes_no_witness, [sig0_py, bytes.fromhex(pk_hex)])
|
||||
|
||||
# Set prevout value
|
||||
ctx = ci0.loadTx(tx_bytes_signed)
|
||||
ctx.vin[0].value_in = ci0.make_int(prevout['amount'])
|
||||
tx_bytes_signed = ctx.serialize()
|
||||
assert (tx_bytes_signed.hex() == sfrtx['hex'])
|
||||
|
||||
sent_txid = ci0.rpc_wallet('sendrawtransaction', [tx_bytes_signed.hex(), ])
|
||||
assert (len(sent_txid) == 64)
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
unittest.main()
|
||||
|
||||
Loading…
Reference in New Issue
Block a user