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Pure python EC

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This removes the dependency on OpenSSL for the interaction tests, by providing a pure-Python
toy implementation of secp256k1.
This commit is contained in:
Pieter Wuille
2019-04-15 16:49:18 -07:00
parent 598323911e
commit 8c7b9324ca
5 changed files with 332 additions and 213 deletions
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23
test/functional/p2p_segwit.py
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@@ -9,7 +9,7 @@ import struct
import time
from test_framework.blocktools import create_block, create_coinbase, add_witness_commitment, get_witness_script, WITNESS_COMMITMENT_HEADER
from test_framework.key import CECKey, CPubKey
from test_framework.key import ECKey
from test_framework.messages import (
BIP125_SEQUENCE_NUMBER,
CBlock,
@@ -100,7 +100,7 @@ def get_p2pkh_script(pubkeyhash):
def sign_p2pk_witness_input(script, tx_to, in_idx, hashtype, value, key):
"""Add signature for a P2PK witness program."""
tx_hash = SegwitVersion1SignatureHash(script, tx_to, in_idx, hashtype, value)
signature = key.sign(tx_hash) + chr(hashtype).encode('latin-1')
signature = key.sign_ecdsa(tx_hash) + chr(hashtype).encode('latin-1')
tx_to.wit.vtxinwit[in_idx].scriptWitness.stack = [signature, script]
tx_to.rehash()
@@ -1479,10 +1479,9 @@ class SegWitTest(BitcoinTestFramework):
# Segwit transactions using uncompressed pubkeys are not accepted
# under default policy, but should still pass consensus.
key = CECKey()
key.set_secretbytes(b"9")
key.set_compressed(False)
pubkey = CPubKey(key.get_pubkey())
key = ECKey()
key.generate(False)
pubkey = key.get_pubkey().get_bytes()
assert_equal(len(pubkey), 65) # This should be an uncompressed pubkey
utxo = self.utxo.pop(0)
@@ -1512,7 +1511,7 @@ class SegWitTest(BitcoinTestFramework):
tx2.vout.append(CTxOut(tx.vout[0].nValue - 1000, script_wsh))
script = get_p2pkh_script(pubkeyhash)
sig_hash = SegwitVersion1SignatureHash(script, tx2, 0, SIGHASH_ALL, tx.vout[0].nValue)
signature = key.sign(sig_hash) + b'\x01' # 0x1 is SIGHASH_ALL
signature = key.sign_ecdsa(sig_hash) + b'\x01' # 0x1 is SIGHASH_ALL
tx2.wit.vtxinwit.append(CTxInWitness())
tx2.wit.vtxinwit[0].scriptWitness.stack = [signature, pubkey]
tx2.rehash()
@@ -1566,7 +1565,7 @@ class SegWitTest(BitcoinTestFramework):
tx5.vin.append(CTxIn(COutPoint(tx4.sha256, 0), b""))
tx5.vout.append(CTxOut(tx4.vout[0].nValue - 1000, CScript([OP_TRUE])))
(sig_hash, err) = SignatureHash(script_pubkey, tx5, 0, SIGHASH_ALL)
signature = key.sign(sig_hash) + b'\x01' # 0x1 is SIGHASH_ALL
signature = key.sign_ecdsa(sig_hash) + b'\x01' # 0x1 is SIGHASH_ALL
tx5.vin[0].scriptSig = CScript([signature, pubkey])
tx5.rehash()
# Should pass policy and consensus.
@@ -1579,9 +1578,9 @@ class SegWitTest(BitcoinTestFramework):
@subtest
def test_signature_version_1(self):
key = CECKey()
key.set_secretbytes(b"9")
pubkey = CPubKey(key.get_pubkey())
key = ECKey()
key.generate()
pubkey = key.get_pubkey().get_bytes()
witness_program = CScript([pubkey, CScriptOp(OP_CHECKSIG)])
witness_hash = sha256(witness_program)
@@ -1716,7 +1715,7 @@ class SegWitTest(BitcoinTestFramework):
script = get_p2pkh_script(pubkeyhash)
sig_hash = SegwitVersion1SignatureHash(script, tx2, 0, SIGHASH_ALL, tx.vout[0].nValue)
signature = key.sign(sig_hash) + b'\x01' # 0x1 is SIGHASH_ALL
signature = key.sign_ecdsa(sig_hash) + b'\x01' # 0x1 is SIGHASH_ALL
# Check that we can't have a scriptSig
tx2.vin[0].scriptSig = CScript([signature, pubkey])