def sign_donation_tx(tx, i, priv):
from bitcoin.main import fast_multiply, decode_privkey, G, inv, N
from bitcoin.transaction import der_encode_sig
k = sign_k
hashcode = btc.SIGHASH_ALL
i = int(i)
if len(priv) <= 33:
priv = btc.safe_hexlify(priv)
pub = btc.privkey_to_pubkey(priv)
address = btc.pubkey_to_address(pub)
signing_tx = btc.signature_form(
tx, i, btc.mk_pubkey_script(address), hashcode)
msghash = btc.bin_txhash(signing_tx, hashcode)
z = btc.hash_to_int(msghash)
# k = deterministic_generate_k(msghash, priv)
r, y = fast_multiply(G, k)
s = inv(k, N) * (z + r * decode_privkey(priv)) % N
rawsig = 27 + (y % 2), r, s
sig = der_encode_sig(*rawsig) + btc.encode(hashcode, 16, 2)
# sig = ecdsa_tx_sign(signing_tx, priv, hashcode)
txobj = btc.deserialize(tx)
txobj["ins"][i]["script"] = btc.serialize_script([sig, pub])
return btc.serialize(txobj)
def sign_donation_tx(tx, i, priv):
from bitcoin.main import fast_multiply, decode_privkey, G, inv, N
from bitcoin.transaction import der_encode_sig
k = sign_k
hashcode = btc.SIGHASH_ALL
i = int(i)
if len(priv) <= 33:
priv = btc.safe_hexlify(priv)
pub = btc.privkey_to_pubkey(priv)
address = btc.pubkey_to_address(pub)
signing_tx = btc.signature_form(tx, i, btc.mk_pubkey_script(address),
hashcode)
msghash = btc.bin_txhash(signing_tx, hashcode)
z = btc.hash_to_int(msghash)
# k = deterministic_generate_k(msghash, priv)
r, y = fast_multiply(G, k)
s = inv(k, N) * (z + r * decode_privkey(priv)) % N
rawsig = 27 + (y % 2), r, s
sig = der_encode_sig(*rawsig) + btc.encode(hashcode, 16, 2)
# sig = ecdsa_tx_sign(signing_tx, priv, hashcode)
txobj = btc.deserialize(tx)
txobj["ins"][i]["script"] = btc.serialize_script([sig, pub])
return btc.serialize(txobj)
def insecure_ecdsa_sign(msghash, priv):
global insecure_k
z = hash_to_int(msghash)
k = insecure_k
r, y = fast_multiply(G, k)
s = inv(k, N) * (z + r * decode_privkey(priv)) % N
v, r, s = 27 + ((y % 2) ^
(0 if s * 2 < N else 1)), r, s if s * 2 < N else N - s
if 'compressed' in get_privkey_format(priv):
print("COmpressed \a")
v += 4
return v, r, s