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Diffstat (limited to 'test/functional/test_framework/bignum.py')
-rw-r--r-- | test/functional/test_framework/bignum.py | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/test/functional/test_framework/bignum.py b/test/functional/test_framework/bignum.py deleted file mode 100644 index db5ccd62c2..0000000000 --- a/test/functional/test_framework/bignum.py +++ /dev/null @@ -1,58 +0,0 @@ -#!/usr/bin/env python3 -# -# Distributed under the MIT software license, see the accompanying -# file COPYING or http://www.opensource.org/licenses/mit-license.php. -"""Big number routines. - -This file is copied from python-bitcoinlib. -""" - -import struct - - -# generic big endian MPI format - -def bn_bytes(v, have_ext=False): - ext = 0 - if have_ext: - ext = 1 - return ((v.bit_length()+7)//8) + ext - -def bn2bin(v): - s = bytearray() - i = bn_bytes(v) - while i > 0: - s.append((v >> ((i-1) * 8)) & 0xff) - i -= 1 - return s - -def bn2mpi(v): - have_ext = False - if v.bit_length() > 0: - have_ext = (v.bit_length() & 0x07) == 0 - - neg = False - if v < 0: - neg = True - v = -v - - s = struct.pack(b">I", bn_bytes(v, have_ext)) - ext = bytearray() - if have_ext: - ext.append(0) - v_bin = bn2bin(v) - if neg: - if have_ext: - ext[0] |= 0x80 - else: - v_bin[0] |= 0x80 - return s + ext + v_bin - -# bitcoin-specific little endian format, with implicit size -def mpi2vch(s): - r = s[4:] # strip size - r = r[::-1] # reverse string, converting BE->LE - return r - -def bn2vch(v): - return bytes(mpi2vch(bn2mpi(v))) |