Created
April 21, 2020 19:39
-
-
Save mrT4ntr4/128b6aae28a39bb5f521c9e400c48013 to your computer and use it in GitHub Desktop.
Trying decryption of hash for Challenge SharpPasswd.dll from VolgaCTF 2020 (Unsolved)
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
dd = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" | |
get_bin = lambda x: format(x, 'b').zfill(6) | |
enc = "h3dly.DhgeOUeicweL2Zp." | |
n = 4 | |
enc = [enc[i:i+n] for i in range(0, len(enc), n)] | |
#print enc | |
i=0 | |
hash = [None] * 16 | |
for chunk in enc: | |
lol = '' | |
for x in chunk[::-1]: | |
lol += get_bin(dd.find(x)) | |
res = int(lol,2) | |
if(i < 4): | |
hash[i] = res & 0xff | |
hash[i+6] = (res >> 8) & 0xff | |
hash[i+12] = (res >> 16) & 0xff | |
elif(i==4): | |
#print res & 0xff, (res >> 8) & 0xff,(res >> 16) & 0xff | |
hash[4] = res & 0xff | |
hash[10] = (res >> 8) & 0xff | |
hash[5] = (res >> 16) & 0xff | |
else: | |
hash[11] = res & 0xff | |
i += 1 | |
hash = ''.join(['{:02x}'.format(x) for x in hash]) | |
print hash |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment