mirror of https://github.com/mkerrisk/man-pages
70 lines
1.7 KiB
Groff
70 lines
1.7 KiB
Groff
.\" Copyright 2003 walter harms (walter.harms@informatik.uni-oldenburg.de)
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.\" Distributed under GPL
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.\" this is the 3rd type of interface for cryptographic routines
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.\" 1. encrypt() expects a bit field
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.\" 2. cbc_crypt() byte values
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.\" 3. xencrypt() a hexstring
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.\" to bad to be true :(
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.\"
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.TH XCRYPT 3 2003-04-04 "" "Linux Programmer's Manual"
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.SH NAME
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xencrypt, xdecrypt, passwd2des \- RFS password encryption
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.SH SYNOPSIS
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.B "#include <rpc/des_crypt.h>"
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.sp
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.BI "void passwd2des(char " *passwd ", char *" key ");"
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.sp
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.BI "int xencrypt(char *" secret ", char *" passwd ");"
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.sp
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.BI "int xdecrypt(char *" secret ", char *" passwd ");"
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.SH DESCRIPTION
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The function
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.BR passwd2des ()
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takes a character string
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.I passwd
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of arbitrary length and fills a character array
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.I key
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of length 8.
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The array
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.I key
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is suitable for use as DES key.
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It has odd parity set in bit 0 of each byte.
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Both other functions described here use this function to turn their
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argument
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.I passwd
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into a DES key.
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.LP
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The
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.BR xencrypt ()
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function takes the ASCII character string
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.I secret
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given in hex,
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.\" (over the alphabet 0123456789abcdefABCDEF),
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which must have a length that is a multiple of 16,
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encrypts it using the DES key derived from
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.I passwd
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by
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.BR passwd2des (),
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and outputs the result again in
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.I secret
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as a hex string
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.\" (over the alphabet 0123456789abcdef)
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of the same length.
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.LP
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The
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.BR xdecrypt ()
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function performs the converse operation.
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.SH "RETURN VALUE"
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The functions
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.BR xencrypt ()
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and
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.BR xdecrypt ()
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return 1 on success and 0 on error.
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.SH VERSIONS
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These routines are present in libc 4.6.27 and later, and in
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glibc 2.1 and later.
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.SH BUGS
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The prototypes are missing from the abovementioned include file.
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.SH "SEE ALSO"
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.BR cbc_crypt (3)
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