那伟大侠又在c下加密解密的程序

dontknowall

那伟大侠又在c下加密解密的程序？感谢

liupch

要什么算法的？

无双

都有算法库可以用的
如DES

dontknowall

我就是不知道怎么用，望指点

liupch

最简单的C下面有一个crypt函数可以实现加密。应该是DES算法的

dontknowall

大虾，有例子吗？给我参考一下！先谢了

liupch

#include <unistd.h>;
char *crypt(const char *key, const char *salt);

dontknowall

key和salt参数是什么含义
这个函数的帮助在哪能查到
我有个函数库，但却查不到

liupch

1. 
   
2. SYNOPSIS
   
3.      #include <unistd.h>;
   
4. 
   
5.      char *crypt(const char *key, const char *salt);
   
6. 
   
7. DESCRIPTION
   
8.      The crypt() function is a  string  encoding  function,  used
   
9.      primarily for password encryption.  It is based on a one-way
   
10.      encryption algorithm with variations intended  (among  other
    
11.      things)  to  frustrate  use of hardware implementations of a
    
12.      key search.
    
13. 
    
14.      The key argument points to a string to be encoded (for exam-
    
15.      ple,  the  user's password.) Only the first eight characters
    
16.      are used; the rest are ignored. The salt is a  two-character
    
17.      string  chosen  from  the  set [a-zA-Z0-9./]. This string is
    
18.      used to perturb the hashing algorithm in one  of  4096  dif-
    
19.      ferent ways.
    
20. 
    
21. RETURN VALUES
    
22.      Upon successful completion, crypt() returns a pointer to the
    
23.      encoded  string.  The  first  two characters of the returned
    
24.      value are those of the salt argument. Otherwise it returns a
    
25.      null pointer and sets errno to indicate the error.
    
26. 
    
27.      In multithreaded applications, the return value is a pointer
    
28.      to thread-specific data.
    
29. 
    
30. ERRORS
    
31.      The crypt() function will fail if:
    
32. 
    
33.      ENOSYS    The functionality is not supported on this  imple-
    
34.                mentation.
    
35. 
    
36. USAGE
    
37.      The return value of crypt() points to static  data  that  is
    
38.      overwritten by each call.
    
39. 
    
40.      The values returned by this function  may  not  be  portable
    
41.      among XSI-conformant systems.
    

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dontknowall

大虾，解密的函数是什么啊？
还有你的函数库是什么地方当的啊，给我一份好吗？