Standard C library (libc, -lc)
#include <rpc/des_crypt.h> void passwd2des(char *passwd, char *key); int xencrypt(char *secret, char *passwd); int xdecrypt(char *secret, char *passwd);
WARNING: Do not use these functions in new code. They do not achieve any type of acceptable cryptographic security guarantees.
The function passwd2des() takes a character string passwd of arbitrary length and fills a character array key of length 8. The array key is suitable for use as DES key. It has odd parity set in bit 0 of each byte. Both other functions described here use this function to turn their argument passwd into a DES key.
The xencrypt() function takes the ASCII character string secret given in hex, which must have a length that is a multiple of 16, encrypts it using the DES key derived from passwd by passwd2des(), and outputs the result again in secret as a hex string of the same length.
The xdecrypt() function performs the converse operation.
The functions xencrypt() and xdecrypt() return 1 on success and 0 on error.
These functions are available in glibc since version 2.1.
For an explanation of the terms used in this section, see attributes(7).
|passwd2des(), xencrypt(), xdecrypt()||Thread safety||MT-Safe|
The prototypes are missing from the abovementioned include file.
The man pages passwd2des(3), xdecrypt(3) and xencrypt(3) are aliases of xcrypt(3).