def sign_message(msg, private_key, hex=True):
"""
Sign message
:param msg: message to sign bytes or HEX encoded string.
:param private_key: private key (bytes, hex encoded string or WIF format)
:param hex: (optional) If set to True return key in HEX format, by default is True.
:return: DER encoded signature in bytes or HEX encoded string.
"""
if isinstance(msg, bytearray):
msg = bytes(msg)
if isinstance(msg, str):
try:
msg = bytes_from_hex(msg)
except:
pass
if not isinstance(msg, bytes):
raise TypeError("message must be a bytes or hex encoded string")
if isinstance(private_key, bytearray):
private_key = bytes(private_key)
if isinstance(private_key, str):
try:
private_key = bytes_from_hex(private_key)
except:
if is_wif_valid(private_key):
private_key = wif_to_private_key(private_key, hex=False)
if not isinstance(private_key, bytes):
raise TypeError(
"private key must be a bytes, hex encoded string or in WIF format")
signature = __secp256k1_ecdsa_sign__(msg, private_key)
return signature.hex() if hex else signature
def wif_to_private_key(h, hex=True):
"""
Decode WIF private key to bytes string or HEX encoded string
:param hex: (optional) if set to True return key in HEX format, by default is True.
:return: Private key HEX encoded string or raw bytes string.
"""
return __parent__.wif_to_private_key(h, hex=hex)
def test_create_private_key():
wk = create_private_key()
k = wif_to_private_key(wk)
assert private_key_to_wif(k) == wk
wk = create_private_key(hex=True)
assert len(wk) == 64
wk = create_private_key(hex=False, wif=False)
assert len(wk) == 32
def sign_bitcoin_message(msg, wif, base64_encoded=True):
if not is_wif_valid(wif):
raise ValueError("invalid private key")
compressed = True if wif[0] in ('K', 'L') else False
msg = bitcoin_message(msg)
signature = __secp256k1_ecdsa_sign__(msg, wif_to_private_key(wif,
hex=False), 0)
signature = bytes([signature[0] + 27 + int(compressed) * 4
]) + signature[1:]
if base64_encoded:
return base64.b64encode(signature).decode()
return signature
def test_private_from_xprivate_key():
priv = "xprv9xPgprbtHAtyKqFegHcy7WoUJ7tTsrL3D36Zf4LcXCCNEWfszpQReMWMdSpjE9qo" \
"sHonUirqo418nd6vG46yi34nbHQ8wvWjLLjzMBFKNqM"
assert private_from_xprivate_key(priv) == \
"L2BfXTBFwabUYoGkXKeR34f3TBpcThLtnC8yf6ZURvM952x8sWmz"
assert private_from_xprivate_key(decode_base58(priv, checksum=True))== \
"L2BfXTBFwabUYoGkXKeR34f3TBpcThLtnC8yf6ZURvM952x8sWmz"
assert private_from_xprivate_key(decode_base58(priv, checksum=True).hex(), hex=True)== \
wif_to_private_key("L2BfXTBFwabUYoGkXKeR34f3TBpcThLtnC8yf6ZURvM952x8sWmz", hex=True)
assert private_from_xprivate_key(decode_base58(priv, checksum=True).hex(), wif=False)== \
wif_to_private_key("L2BfXTBFwabUYoGkXKeR34f3TBpcThLtnC8yf6ZURvM952x8sWmz", hex=False)
with pytest.raises(TypeError):
private_from_xprivate_key(423432)
pub = "xpus6BP3EN8n7YTGYKL7nK9yUekCr9ixHK3taG2ATSkE5XjM7K12YMigC9pqUhj" \
"2K2f4TRg8xvDfqpHsWsjBHoMdJ6QF9dfSeKALRiTFAi9dA5T"
with pytest.raises(ValueError):
private_from_xprivate_key(pub)
priv = "tprv8ZgxMBicQKsPf9QH73JoCxLYNjipEn1SHkWWfvsryrNCSbh8gBvfeTg5Crqq" \
"TpsEQZFBUxH8NuQ5EJz8EDHC261tgtvnfBNze2Jteoxhi47"
assert private_from_xprivate_key(priv) == \
"cNu63US2f9jLLwDeD9321q1S5xviXCxSyem2GkFJjcF8DTWxqteC"
def __init__(self, key=None, compressed=True, testnet=False):
if key is None:
#: flag for compressed type of corresponding public key (boolean)
self.compressed = compressed
#: flag for testnet network private key (boolean)
self.testnet = testnet
#: private key in bytes (bytes)
self.key = create_private_key(wif=False)
#: private key in HEX (string)
self.hex = self.key.hex()
#: private key in WIF format (string)
self.wif = private_key_to_wif(self.key, compressed, testnet)
else:
if isinstance(key, str):
try:
key = bytes_from_hex(key)
except:
pass
if isinstance(key, bytes):
if len(key) != 32:
raise TypeError("private key invalid length")
self.key = key
self.compressed = compressed
self.testnet = testnet
self.hex = self.key.hex()
self.wif = private_key_to_wif(self.key, compressed, testnet)
return
if not isinstance(key, str) or not is_wif_valid(key):
raise TypeError("private key invalid")
self.key = wif_to_private_key(key, hex=False)
self.hex = self.key.hex()
if key[0] in (MAINNET_PRIVATE_KEY_UNCOMPRESSED_PREFIX,
TESTNET_PRIVATE_KEY_UNCOMPRESSED_PREFIX):
self.compressed = False
else:
self.compressed = True
if key[0] in (TESTNET_PRIVATE_KEY_UNCOMPRESSED_PREFIX,
TESTNET_PRIVATE_KEY_COMPRESSED_PREFIX):
self.testnet = True
else:
self.testnet = False
self.wif = private_key_to_wif(self.key, self.compressed,
self.testnet)
def sign_message(msg, private_key, hex=True):
"""
Sign message
:param msg: message to sign bytes or HEX encoded string.
:param private_key: private key (bytes, hex encoded string or WIF format)
:param hex: (optional) If set to True return key in HEX format, by default is True.
:return: DER encoded signature in bytes or HEX encoded string.
"""
if isinstance(msg, bytearray):
msg = bytes(msg)
if isinstance(msg, str):
try:
msg = bytes_from_hex(msg)
except:
pass
if not isinstance(msg, bytes):
raise TypeError("message must be a bytes or hex encoded string")
if isinstance(private_key, bytearray):
private_key = bytes(private_key)
if isinstance(private_key, str):
try:
private_key = bytes_from_hex(private_key)
except:
if is_wif_valid(private_key):
private_key = wif_to_private_key(private_key, hex=False)
if not isinstance(private_key, bytes):
raise TypeError("private key must be a bytes, hex encoded string or in WIF format")
raw_sig = ffi.new('secp256k1_ecdsa_signature *')
signed = secp256k1_ecdsa_sign(ECDSA_CONTEXT_SIGN, raw_sig, msg,
private_key, ffi.NULL, ffi.NULL)
if not signed:
raise RuntimeError("secp256k1 error")
len_sig = 74
output = ffi.new('unsigned char[%d]' % len_sig)
outputlen = ffi.new('size_t *', len_sig)
res = secp256k1_ecdsa_signature_serialize_der(ECDSA_CONTEXT_SIGN,
output, outputlen, raw_sig)
if not res:
raise RuntimeError("secp256k1 error")
signature = bytes(ffi.buffer(output, outputlen[0]))
return signature.hex() if hex else signature
def test_wif_to_private_key():
wk = create_private_key(testnet=True)
k = wif_to_private_key(wk)
assert private_key_to_wif(k, testnet=True) == wk
wk = create_private_key(compressed=False)
k = wif_to_private_key(wk)
assert private_key_to_wif(k, compressed=False) == wk
wk = create_private_key(compressed=False, testnet=False)
k = wif_to_private_key(wk)
assert private_key_to_wif(k, compressed=False, testnet=False) == wk
wk = create_private_key(compressed=False, testnet=True)
k = wif_to_private_key(wk)
assert private_key_to_wif(k, compressed=False, testnet=True) == wk
with pytest.raises(TypeError):
wif_to_private_key(
"L49obCXV7fGz2YRzLCSJgeZBYmGeBbKPT7xiehUeYX2S4URkPFqX")