/usr/lib/python2.7/dist-packages/bitcoin/py2specials.py is in python-bitcoin 1.1.42-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 | import sys, re
import binascii
import os
import hashlib
if sys.version_info.major == 2:
string_types = (str, unicode)
string_or_bytes_types = string_types
int_types = (int, float, long)
# Base switching
code_strings = {
2: '01',
10: '0123456789',
16: '0123456789abcdef',
32: 'abcdefghijklmnopqrstuvwxyz234567',
58: '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz',
256: ''.join([chr(x) for x in range(256)])
}
def bin_dbl_sha256(s):
bytes_to_hash = from_string_to_bytes(s)
return hashlib.sha256(hashlib.sha256(bytes_to_hash).digest()).digest()
def lpad(msg, symbol, length):
if len(msg) >= length:
return msg
return symbol * (length - len(msg)) + msg
def get_code_string(base):
if base in code_strings:
return code_strings[base]
else:
raise ValueError("Invalid base!")
def changebase(string, frm, to, minlen=0):
if frm == to:
return lpad(string, get_code_string(frm)[0], minlen)
return encode(decode(string, frm), to, minlen)
def bin_to_b58check(inp, magicbyte=0):
if magicbyte == 0:
inp = '\x00' + inp
while magicbyte > 0:
inp = chr(int(magicbyte % 256)) + inp
magicbyte //= 256
leadingzbytes = len(re.match('^\x00*', inp).group(0))
checksum = bin_dbl_sha256(inp)[:4]
return '1' * leadingzbytes + changebase(inp+checksum, 256, 58)
def bytes_to_hex_string(b):
return b.encode('hex')
def safe_from_hex(s):
return s.decode('hex')
def from_int_representation_to_bytes(a):
return str(a)
def from_int_to_byte(a):
return chr(a)
def from_byte_to_int(a):
return ord(a)
def from_bytes_to_string(s):
return s
def from_string_to_bytes(a):
return a
def safe_hexlify(a):
return binascii.hexlify(a)
def encode(val, base, minlen=0):
base, minlen = int(base), int(minlen)
code_string = get_code_string(base)
result = ""
while val > 0:
result = code_string[val % base] + result
val //= base
return code_string[0] * max(minlen - len(result), 0) + result
def decode(string, base):
base = int(base)
code_string = get_code_string(base)
result = 0
if base == 16:
string = string.lower()
while len(string) > 0:
result *= base
result += code_string.find(string[0])
string = string[1:]
return result
def random_string(x):
return os.urandom(x)
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