xdecrypt3
Rfs password encryption
Part of xcrypt(3).
Usage
#include <rpc/des_crypt.h>
void passwd2des(char *passwd, char *key);
int xencrypt(char *secret, char *passwd); int xdecrypt(char *secret, char *passwd);
Library
Standard C library (libc, -lc)
Overview
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.
Return value
The functions xencrypt() and xdecrypt() return 1 on success and 0 on error.
Attributes
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| passwd2des(), xencrypt(), xdecrypt() | Thread safety | MT-Safe |
Versions
These functions are available since glibc 2.1.
Releases
12 releases since Debian 3.1 (Sarge); the text changed 11 times.