标签：error: The bin echo can red strip cal ack
#! /usr/bin/python3 print("*********************************************************************") print("Cisco IOU License Generator - Kal 2011, python port of 2006 C version") print("Modified to work with python3 by c_d 2014") import os import socket import hashlib import struct # get the host id and host name to calculate the hostkey hostid=os.popen("hostid").read().strip() hostname = socket.gethostname() ioukey=int(hostid,16) for x in hostname: ioukey = ioukey + ord(x) print("hostid=" + hostid +", hostname="+ hostname + ", ioukey=" + hex(ioukey)[2:]) # create the license using md5sum iouPad1 = b‘\x4B\x58\x21\x81\x56\x7B\x0D\xF3\x21\x43\x9B\x7E\xAC\x1D\xE6\x8A‘ iouPad2 = b‘\x80‘ + 39*b‘\0‘ md5input=iouPad1 + iouPad2 + struct.pack(‘!L‘, ioukey) + iouPad1 iouLicense=hashlib.md5(md5input).hexdigest()[:16] print("\nAdd the following text to ~/.iourc:") print("[license]\n" + hostname + " = " + iouLicense + ";\n") print("You can disable the phone home feature with something like:") print(" echo ‘127.0.0.127 xml.cisco.com‘ >> /etc/hosts\n")
问题现象：生成IOU License的时候出现struct.error
#./CiscoIOUkeygen.py ********************************************************************* Cisco IOU License Generator - Kal 2011, python port of 2006 C version hostid=a8c0caa0, hostname=192_168_160_202, ioukey=a8c0ce23L Traceback (most recent call last): File "./crack.py", line 18, in <module> md5input=iouPad1 + iouPad2 + struct.pack(‘!i‘, ioukey) + iouPad1 struct.error: integer out of range for ‘i‘ format code
分析：可能是由于不同机器算出来的值不一样，转换整数的时候溢出。超出‘i‘的范围那就换类型，用I，l或L可能就行了。
原先第21行是这样的：
现在将i改成L
测试成功：
# ./CiscoIOUkeygen.py
说明：
函数的用法是这样的：struct.pack(format, data)
The optional first format char indicates byte order, size and alignment:
@: native order, size & alignment (default)
=: native order, std. size & alignment
<: little-endian, std. size & alignment
>: big-endian, std. size & alignment
!: same as >
The remaining chars indicate types of args and must match exactly;
these can be preceded by a decimal repeat count:
x: pad byte (no data); c:char; b:signed byte; B:unsigned byte;
h:short; H:unsigned short; i:int; I:unsigned int;
l:long; L:unsigned long; f:float; d:double.
Special cases (preceding decimal count indicates length):
s:string (array of char); p: pascal string (with count byte).
Special case (only available in native format):
P:an integer type that is wide enough to hold a pointer.
Special case (not in native mode unless ‘long long‘ in platform C):
q:long long; Q:unsigned long long
Whitespace between formats is ignored.
有时将hostname改短一点也能成功，但不推荐。
标签：error: The bin echo can red strip cal ack
原文地址：https://www.cnblogs.com/zenosblog/p/10161644.html
