mirror of git://sourceware.org/git/glibc.git
150 lines
3.5 KiB
C
150 lines
3.5 KiB
C
/*
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* UFC-crypt: ultra fast crypt(3) implementation
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*
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* Copyright (C) 1991, 1992, 1993, 1996, 1997 Free Software Foundation, Inc.
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*
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* The GNU C Library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* The GNU C Library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with the GNU C Library; if not, write to the Free
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* Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA.
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*
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* crypt entry points
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*
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* @(#)crypt-entry.c 1.2 12/20/96
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*
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*/
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#ifdef DEBUG
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#include <stdio.h>
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#endif
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#include <string.h>
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#ifndef STATIC
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#define STATIC static
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#endif
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#ifndef DOS
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#include "ufc-crypt.h"
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#else
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/*
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* Thanks to greg%wind@plains.NoDak.edu (Greg W. Wettstein)
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* for DOS patches
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*/
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#include "ufc.h"
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#endif
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#include "crypt.h"
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#include "crypt-private.h"
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/* Prototypes for local functions. */
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#if __STDC__ - 0
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#ifndef __GNU_LIBRARY__
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void _ufc_clearmem (char *start, int cnt);
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#else
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#define _ufc_clearmem(start, cnt) memset(start, 0, cnt)
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#endif
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extern char *__md5_crypt_r (const char *key, const char *salt, char *buffer,
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int buflen);
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extern char *__md5_crypt (const char *key, const char *salt);
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#endif
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/* Define our magic string to mark salt for MD5 encryption
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replacement. This is meant to be the same as for other MD5 based
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encryption implementations. */
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static const char md5_salt_prefix[] = "$1$";
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/* For use by the old, non-reentrant routines (crypt/encrypt/setkey) */
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extern struct crypt_data _ufc_foobar;
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/*
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* UNIX crypt function
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*/
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char *
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__crypt_r (key, salt, data)
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const char *key;
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const char *salt;
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struct crypt_data * __restrict data;
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{
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ufc_long res[4];
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char ktab[9];
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ufc_long xx = 25; /* to cope with GCC long long compiler bugs */
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#ifdef _LIBC
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/* Try to find out whether we have to use MD5 encryption replacement. */
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if (strncmp (md5_salt_prefix, salt, sizeof (md5_salt_prefix) - 1) == 0)
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return __md5_crypt_r (key, salt, (char *) data,
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sizeof (struct crypt_data));
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#endif
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/*
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* Hack DES tables according to salt
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*/
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_ufc_setup_salt_r (salt, data);
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/*
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* Setup key schedule
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*/
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_ufc_clearmem (ktab, (int) sizeof (ktab));
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(void) strncpy (ktab, key, 8);
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_ufc_mk_keytab_r (ktab, data);
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/*
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* Go for the 25 DES encryptions
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*/
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_ufc_clearmem ((char*) res, (int) sizeof (res));
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_ufc_doit_r (xx, data, &res[0]);
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/*
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* Do final permutations
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*/
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_ufc_dofinalperm_r (res, data);
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/*
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* And convert back to 6 bit ASCII
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*/
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_ufc_output_conversion_r (res[0], res[1], salt, data);
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return data->crypt_3_buf;
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}
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weak_alias (__crypt_r, crypt_r)
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char *
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crypt (key, salt)
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const char *key;
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const char *salt;
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{
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#ifdef _LIBC
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/* Try to find out whether we have to use MD5 encryption replacement. */
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if (strncmp (md5_salt_prefix, salt, sizeof (md5_salt_prefix) - 1) == 0)
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return __md5_crypt (key, salt);
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#endif
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return __crypt_r (key, salt, &_ufc_foobar);
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}
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/*
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* To make fcrypt users happy.
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* They don't need to call init_des.
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*/
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#ifdef _LIBC
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weak_alias (crypt, fcrypt)
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#else
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char *
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__fcrypt (key, salt)
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const char *key;
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const char *salt;
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{
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return crypt (key, salt);
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}
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#endif
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