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[tests] remove bn2bin()

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It's only called in one place.
This commit is contained in:
John Newbery 2019-10-30 10:39:15 -04:00
parent 3b9b38579c
commit f950ec2520
1 changed files with 12 additions and 12 deletions
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24
test/functional/test_framework/bignum.py
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@ -9,29 +9,29 @@ endian format.
This file is copied from python-bitcoinlib. This file is copied from python-bitcoinlib.
""" """
def bn2bin(v):
"""Convert a number to a byte array."""
s = bytearray()
bytes_len = (v.bit_length() + 7) // 8
for i in range(bytes_len, 0, -1):
s.append((v >> ((i - 1) * 8)) & 0xff)
return s
def bn2mpi(v): def bn2mpi(v):
"""Convert number to MPI format, without the sign byte.""" """Convert number to MPI format, without the sign byte."""
# The top bit is used to indicate the sign of the number. If there
# isn't a spare bit in the bit length, add an extension byte.
have_ext = False have_ext = False
ext = bytearray()
if v.bit_length() > 0: if v.bit_length() > 0:
have_ext = (v.bit_length() & 0x07) == 0 have_ext = (v.bit_length() & 0x07) == 0
ext.append(0)
# Is the number negative?
neg = False neg = False
if v < 0: if v < 0:
neg = True neg = True
v = -v v = -v
ext = bytearray() # Convert the int to bytes
if have_ext: v_bin = bytearray()
ext.append(0) bytes_len = (v.bit_length() + 7) // 8
v_bin = bn2bin(v) for i in range(bytes_len, 0, -1):
v_bin.append((v >> ((i - 1) * 8)) & 0xff)
# Add the sign bit if necessary
if neg: if neg:
if have_ext: if have_ext:
ext[0] |= 0x80 ext[0] |= 0x80