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XCRYPT(3) Linux Programmer's Manual XCRYPT(3)
NAME
xencrypt, xdecrypt, passwd2des - RFS password encryption
SYNOPSIS
#include <rpc/des_crypt.h>
void passwd2des(char *passwd, char *key);
int xencrypt(char *secret, char *passwd);
int xdecrypt(char *secret, char *passwd);
DESCRIPTION
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.
VERSIONS
These functions are available in glibc since version 2.1.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
│passwd2des(), xencrypt(), xdecrypt() │ Thread safety │ MT-Safe │
└──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘
BUGS
The prototypes are missing from the abovementioned include file.
SEE ALSO
cbc_crypt(3)
2021-03-22 XCRYPT(3)