crypt密码加密

stlaw

php里面查到是这样的：
   
     CRYPT_STD_DES - Standard DES-based encryption with a two character salt
   
   
   
     CRYPT_EXT_DES - Extended DES-based encryption with a nine character salt
   
   
   
     CRYPT_MD5 - MD5 encryption with a twelve character salt starting with
     $1$
   
   
   
     CRYPT_BLOWFISH - Blowfish encryption with a sixteen character salt
     starting with $2$ or $2a$
    并且有这样的示例：
if (CRYPT_STD_DES == 1) {
    echo 'Standard DES: ' . crypt('rasmuslerdorf', 'rl') . "\n";
}
if (CRYPT_EXT_DES == 1) {
    echo 'Extended DES: ' . crypt('rasmuslerdorf', '_J9..rasm') . "\n";
}
if (CRYPT_MD5 == 1) {
    echo 'MD5:          ' . crypt('rasmuslerdorf', '$1$rasmusle$') . "\n";
}
if (CRYPT_BLOWFISH == 1) {
    echo 'Blowfish:     ' . crypt('rasmuslerdorf', '$2a$07$rasmuslerd...........$') . "\n";
}
?>
    在linux和windows下，都只支持标准DES和md5加密这2种，不知其他2个怎么折腾出来；
python的crypt模块也只是对标准和md5说了下，看来也是同样情况；
标准DES加密：
是从64个字符（大小写A-Z，0-9，还有/ .）挑2个作为salt；
扩展DES： 挑9个；
标准MD5: 是挑8个，然后用$1$SALT$， 这样12个字符作为salt；
BLOWFISH: 没明白，说是16个字符，可数来数去都不止；
姑且照葫芦画瓢，把BLOWFISH当成16个字符：
===============================================================
import random,crypt,getpass
salt = ''
print """
crypt method choose:
1) standard DES
#2) extended DES
3) MD5
#4) BLOWFISH
"""
choosenum = int(raw_input())
if choosenum == 1:  totalnum = 2
#elif choosenum == 2:  totalnum = 9
elif choosenum == 3:  totalnum = 8
#elif choosenum == 4:  totalnum = 12
else:
    print "choose error num"
    sys.exit(0)
for i in range(0,totalnum):
    salt = salt + random.choice('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./0123456789')
#print "salt is:", salt
newpass = getpass.getpass("pls input your password:")
if choosenum == 3:
    print crypt.crypt(newpass,"$1$" + salt + "$")
elif choosenum == 1 or choosenum == 2 :
    print crypt.crypt(newpass,salt)
#elif choosenum == 4:
#    print crypt.crypt(newpass,"$2$" + salt + "$")
得到的加密字符，取代shadow文件中的密码部分；
               
               
               

本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u1/57278/showart_1163128.html