NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | VERSIONS | BUGS | SEE ALSO | COLOPHON |
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XCRYPT(3) Library Functions Manual XCRYPT(3)
xencrypt, xdecrypt, passwd2des - RFS password encryption
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.
For an explanation of the terms used in this section, see attributes(7). ┌─────────────────────────────────────┬───────────────┬─────────┐ │ Interface │ Attribute │ Value │ ├─────────────────────────────────────┼───────────────┼─────────┤ │ passwd2des(), xencrypt(), │ Thread safety │ MT-Safe │ │ xdecrypt() │ │ │ └─────────────────────────────────────┴───────────────┴─────────┘
These functions are available since glibc 2.1.
The prototypes are missing from the abovementioned include file.
cbc_crypt(3)
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Linux man-pages 6.9.1 2024-05-02 XCRYPT(3)
Pages that refer to this page: des_crypt(3)