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Merge pull request #616 from terzim/patch-2

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Update ec-math.py
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Will Binns 2019-10-04 21:41:25 +02:00 committed by GitHub
commit cec55847b0
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1 changed files with 6 additions and 10 deletions
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code/ec-math.py
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@ -20,29 +20,25 @@ generator = generator_secp256k1
def random_secret(): def random_secret():
convert_to_int = lambda array: int("".join(array).encode("hex"), 16)
# Collect 256 bits of random data from the OS's cryptographically secure # Collect 256 bits of random data from the OS's cryptographically secure
# random number generator # random number generator
byte_array = os.urandom(32) byte_array = (os.urandom(32)).hex()
return convert_to_int(byte_array)
return int(byte_array,16)
def get_point_pubkey(point): def get_point_pubkey(point):
if (point.y() % 2) == 1: if (point.y() % 2) == 1:
key = '03' + '%064x' % point.x() key = '03' + '%064x' % point.x()
else: else:
key = '02' + '%064x' % point.x() key = '02' + '%064x' % point.x()
return key.decode('hex') return key
def get_point_pubkey_uncompressed(point): def get_point_pubkey_uncompressed(point):
key = ('04' + key = ('04' +
'%064x' % point.x() + '%064x' % point.x() +
'%064x' % point.y()) '%064x' % point.y())
return key.decode('hex') return key
# Generate a new private key. # Generate a new private key.
secret = random_secret() secret = random_secret()
@ -50,9 +46,9 @@ print("Secret: ", secret)
# Get the public key point. # Get the public key point.
point = secret * generator point = secret * generator
print("EC point:", point) print("Elliptic Curve point:", point)
print("BTC public key:", get_point_pubkey(point).encode("hex")) print("BTC public key:", get_point_pubkey(point))
# Given the point (x, y) we can create the object using: # Given the point (x, y) we can create the object using:
point1 = ecdsa.ellipticcurve.Point(curve, point.x(), point.y(), ec_order) point1 = ecdsa.ellipticcurve.Point(curve, point.x(), point.y(), ec_order)