crypt密碼加密

stlaw

php里面查到是這樣的：
   
     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 $2a$
    并且有這樣的示例：
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，都只支持標(biāo)準(zhǔn)DES和md5加密這2種，不知其他2個(gè)怎么折騰出來；
python的crypt模塊也只是對(duì)標(biāo)準(zhǔn)和md5說了下，看來也是同樣情況；
標(biāo)準(zhǔn)DES加密：
是從64個(gè)字符（大小寫A-Z，0-9，還有/ .）挑2個(gè)作為salt；
擴(kuò)展DES： 挑9個(gè)；
標(biāo)準(zhǔn)MD5: 是挑8個(gè)，然后用$1$SALT$， 這樣12個(gè)字符作為salt；
BLOWFISH: 沒明白，說是16個(gè)字符，可數(shù)來數(shù)去都不止；
姑且照葫蘆畫瓢，把BLOWFISH當(dāng)成16個(gè)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文件中的密碼部分；
               
               
               

本文來自ChinaUnix博客，如果查看原文請(qǐng)點(diǎn)：http://blog.chinaunix.net/u1/57278/showart_1163128.html