河南网通用户名转换工具，可以用转换后的用户名直接进行PPPoE拨号，无需Racer客户端。

cncc_pppoe_username_decode.py

#coding: utf-8
#河南网通用户名转换工具，可以用转换后的用户名直接进行PPPoE拨号，无需Racer客户端。


def cncc_pppoe_username_decode(username):
	u= username
	k1='9012345678abcdeABCDEFGHIJKLMNfghijklmnUVWXYZxyzuvwopqrstOPQRST'
	k2=[0x11,0x34,0xC9,0x23,0x75,0x18,0xD7,0xE2,0x12,0x35,0x29,0x2B,0xEC,0xB6,0x23,0x19]
	r=[0 for x in range(0,len(u))]
	a=37
	b=0
	for i in range(0, len(u)):
		for j in range(0, len(k1)):
			if u[i]==k1[j]:
				#chars in k1
				t= k2[i] if i<16 else k2[i % 16]
				t= ((t ^ (a * 3)) ^ b) + j
				r[i]= k1[t % 62]
				a= a ^ ((t % 62) + 9433)
				break
		if r[i]==0:
			#unlist chars
			r[i]= k1[i]
		b= b+ 5
	return ''.join(r)

u=raw_input('username: ')
print 'your PPPoE account: 2:%s' % cncc_pppoe_username_decode(u)