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PrivateKey generation from entropy #59

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PrivateKey generation from entropy #59

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770656d
add generate function in PrivateKey
csyhuang Oct 5, 2020
39950ef
Return a PrivateKey object in the class method
csyhuang Oct 7, 2020
09f8abe
correct docstring
csyhuang Oct 7, 2020
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8 changes: 8 additions & 0 deletions btcpy/structs/crypto.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@
# propagated, or distributed except according to the terms contained in the
# LICENSE.md file.

import secrets
from binascii import unhexlify
from ..lib.base58 import b58decode_check, b58encode_check
from hashlib import sha256
Expand Down Expand Up @@ -61,6 +62,13 @@ def from_wif(wif, strict=None):
def unhexlify(hexa):
return PrivateKey(bytearray(unhexlify(hexa)))

@staticmethod
def generate():
"""
Generate a random text string, in hexadecimal with 32 random bytes.
"""
return PrivateKey(bytearray(secrets.token_hex(nbytes=32), encoding='ascii'))

def __init__(self, priv, public_compressed=True):
self.key = priv
self.public_compressed = public_compressed
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6 changes: 6 additions & 0 deletions tests/unit.py
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Expand Up @@ -418,6 +418,12 @@ def test_to_wif(self):
priv.public_compressed = False
self.assertEqual(priv.to_wif(w['mainnet']), w['wif'])

def test_private_key_generation(self):
with patch('secrets.token_hex', return_value='1697da9ed39e670abb6981dcfe9ea96db2f06e7d6d18db2474ffb2ffadd1e3bb'):
priv = PrivateKey.generate()
self.assertEqual(len(priv.key), 64)
self.assertEqual(priv.key, bytearray(b'1697da9ed39e670abb6981dcfe9ea96db2f06e7d6d18db2474ffb2ffadd1e3bb'))


class TestPubkey(unittest.TestCase):

Expand Down