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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(), xdecrypt() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
These functions are available since glibc 2.1.
The prototypes are missing from the abovementioned include file.
cbc_crypt(3)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.10.tar.gz
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2025-02-02. If you discover any rendering problems in this HTML
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Linux man-pages 6.10 2024-07-23 XCRYPT(3)
Pages that refer to this page: des_crypt(3)
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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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