md5analy works in iterate mode

This commit is contained in:
Christoph J. Scherr 2023-04-24 17:12:50 +02:00
parent 773d7f6366
commit 53c6c6eb94
Signed by: PlexSheep
GPG Key ID: 25B4ACF7D88186CC
1 changed files with 36 additions and 4 deletions

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@ -5,20 +5,52 @@ A small script to help analyze the md5 hash function.
@author Christoph J. Scherr <software@cscherr.de>
@license MIT
@source: https://git.cscherr.de/PlexSheep/python-dhbw/src/branch/master/src/md5-analyzer.py
TODO do I need to implement md5 by myself for the assignment?
"""
import argparse
import hashlib
def main():
parser = argparse.ArgumentParser(prog="md5-analyzer", description='md5 analyzer for a cryptography assignment')
parser.add_argument('--hash', type=str,
parser.add_argument('-i', '--input', type=str,
help='an input that should be hashed.')
parser.add_argument('-a', '--print-all', action="store_true",
help="print all hashes in iterate mode")
parser.add_argument('-t', '--iterate', action="store_true",
help='iterate 0 to 999999 (chars), generate hashes for this, analyze it\'s hashes.')
args = parser.parse_args()
if args.hash:
if args.iterate:
if not args.input:
args.input = ""
print('='*80)
hashlist = []
max = 999999
searchbytes = "0000"
for i in range(0, max + 1):
# max should be included, so +x for the counter
input = (args.input + str(i))
hash = hashlib.md5(input.encode())
# print only every 1000 lines for performance
if i % 1000 == 0 or args.print_all:
print("inp %s\t\t| out %s" % (input, hash.hexdigest()))
if hash.hexdigest()[0:4] == searchbytes:
hashlist.append((i, hash.hexdigest()))
print("^" * 80)
print('='*80)
for (index, hash) in hashlist:
print("ind %i\t\t| has %s" % (index, hash))
print('='*80)
size_of_first_x = 2**16
expected = size_of_first_x / max
print("found %d items.\nExpected %d (%f%%) from %d" % (len(hashlist), expected, expected / size_of_first_x, max))
exit()
if args.input:
print("Hash for '%s':\n%s" % (
args.hash,
hashlib.md5(args.hash.encode()).digest().hex()
args.input,
hashlib.md5(args.input.encode()).digest().hex()
))
exit()
parser.print_usage()