#!/usr/bin/env python3
from coll import Collider, md5pad, filter_disallow_binstrings
file = open("../files/grade.txt", "r")
# Generate a 213-way collision as a test
c = Collider(pad=b' ', blockfilter=filter_disallow_binstrings([b'\0']))
# begin the output files with hello world text
c.strcat(file.read())
# Diverge 8 times. That means 2^8 possibilities
for i in range(8):
print('Stage {} of 8'.format(i+1))
# we fork into 2 different possibilities of collision blocks (128 byte garbage each) here
c.diverge()
# place some text in the middle of each divergence
c.strcat('More text: {}\n'.format(i))
c.strcat('\nFinal.')
# Select the first 213 collisions to output to file
for i,data in enumerate(c.get_collisions(count=213)):
with open('out_test_%03d.txt' % i, 'wb') as f:
f.write(data)
print('Done')
#!/usr/bin/env python3
from coll import Collider, md5pad, filter_disallow_binstrings
# Generate a 213-way collision as a test
c = Collider(pad=b' ', blockfilter=filter_disallow_binstrings([b'\0']))
# begin the output files with hello world text
c.strcat('Hello world.')
# Diverge 8 times. That means 2^8 possibilities
for i in range(8):
print('Stage {} of 8'.format(i+1))
# we fork into 2 different possibilities of collision blocks (128 byte garbage each) here
c.diverge()
# place some text in the middle of each divergence
c.strcat('More text: {}\n'.format(i))
c.strcat('\nFinal.')
# Select the first 213 collisions to output to file
for i,data in enumerate(c.get_collisions(count=213)):
with open('out_test_%03d.txt' % i, 'wb') as f:
f.write(data)
print('Done')
#!/usr/bin/env python2
# -*- coding: utf-8 -*-
#
diff = '''<one of 2 collision blocks>'''
same = '''<first of the 2 collision blocks>'''
if (same == diff):
print "good"
else:
print "evil"
"""
collider = Collider(blockfilter=filter_disallow_binstrings([b'\0', b"'''"]))
prefix1 = b"""#!/usr/bin/env python2
# -*- coding: utf-8 -*-
#"""
prefix2 = b"""\ndiff = '''"""
# Ensure prefix is a multiple of 64 bytes
prefix = prefix1 + md5pad(prefix1 + prefix2, b' ') + prefix2
# Load the first half of the collision files that opens the 'diff' variable delcaration
collider.bincat(prefix)
# Fill in the 'diff' variable with 2 different blocks that may be chosen
collider.safe_diverge()
postfix = b"""'''
startchars = q-(64*3)
if not first:
first = i
offset = i - startchars
else:
second = startchars + offset
compdata[q] = 0
break
if not (first and second):
raise Exception('error: did not find marker strings')
# Splice in the collision blocks according to the obtained offsets
collider = Collider(blockfilter=filter_disallow_binstrings([b'\0']))
collider.bincat(compdata[:first])
collider.safe_diverge()
c1, c2 = collider.get_last_coll()
collider.bincat(compdata[first+128:second] + c1 + compdata[second+128:])
# Write out good and evil binaries
cols = collider.get_collisions()
GOOD = 'out_c_good'
EVIL = 'out_c_evil'
with open(GOOD, 'wb') as good:
good.write(next(cols))
with open(EVIL, 'wb') as evil:
if compdata[q] == ord('+') or compdata[q] == ord('-'):
startchars = q - (64 * 3)
if not first:
first = i
offset = i - startchars
else:
second = startchars + offset
compdata[q] = 0
break
if not (first and second):
raise Exception('error: did not find marker strings')
# Splice in the collision blocks according to the obtained offsets
collider = Collider(blockfilter=filter_disallow_binstrings([b'\0']))
collider.bincat(compdata[:first])
collider.safe_diverge()
c1, c2 = collider.get_last_coll()
collider.bincat(compdata[first + 128:second] + c1 + compdata[second + 128:])
# Write out good and evil binaries
cols = collider.get_collisions()
GOOD = 'out_c_good'
EVIL = 'out_c_evil'
with open(GOOD, 'wb') as good:
good.write(next(cols))
with open(EVIL, 'wb') as evil:
"""
#!/usr/bin/env python2
# -*- coding: utf-8 -*-
#
diff = '''<one of 2 collision blocks>'''
same = '''<first of the 2 collision blocks>'''
if (same == diff):
print "good"
else:
print "evil"
"""
collider = Collider(blockfilter=filter_disallow_binstrings([b'\0', b"'''"]))
prefix1 = b"""#!/usr/bin/env python2
# -*- coding: utf-8 -*-
#"""
prefix2 = b"""\ndiff = '''"""
# Ensure prefix is a multiple of 64 bytes
prefix = prefix1 + md5pad(prefix1 + prefix2, b' ') + prefix2
# Load the first half of the collision files that opens the 'diff' variable delcaration
collider.bincat(prefix)
# Fill in the 'diff' variable with 2 different blocks that may be chosen
collider.safe_diverge()
postfix = b"""'''
