BUUCTF crypto 还原大师
# -*- coding: utf-8 -*- #!/usr/bin/env python import hashlib #print hashlib.md5(s).hexdigest().upper() k = 'TASC?O3RJMV?WDJKX?ZM' for i in range(26): temp1 = k.replace('?',str(chr(65+i)),1) for j in range(26): temp2 = temp1.replace('?',chr(65+j),1) for n in range(26): temp3 = temp2.replace('?',chr(65+n),1) s = hashlib.md5(temp3.encode('utf8')).hexdigest().upper() if s[:4] == 'E903': print s