[exim.git] / src / src / crypt16.c

/* $Cambridge: exim/src/src/crypt16.c,v 1.1 2004/10/07 10:39:01 ph10 Exp $ */

/*
 * Copyright (c) 2000-2002
 *   Chris Adams <cmadams@iruntheinter.net>
 *   written for HiWAAY Internet Services
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA
 */

/*
 * Adapted for Exim by Tamas TEVESZ <ice@extreme.hu>
 * Further adapted by Philip Hazel to cut out this function for operating
 *   systems that have a built-in version.
 */

/* The OS has a built-in crypt16(). Some compilers don't like compiling empty
modules, so keep them happy with a dummy when skipping the rest. */

#include "config.h"

#ifdef HAVE_CRYPT16
static void dummy(int x) { dummy(x-1); }
#else

/* The OS doesn't have a built-in crypt16(). Compile this one. */

#include <unistd.h>
#include <string.h>
#include "os.h"

#ifdef CRYPT_H
#include <crypt.h>
#endif

char *crypt16(char *key, char *salt)
{
       static char res[25];
       static char s2[3];
       char *p;

       /* Clear the string of any previous data */
       memset (res, 0, sizeof (res));

       /* crypt the first part */
       p = crypt (key, salt);
       strncpy (res, p, 13);

       if (strlen (key) > 8)
       {
               /* crypt the rest
                * the first two characters of the first block (not counting
                * the salt) make up the new salt */
               strncpy (s2, &(res[2]), 2);
               p = crypt (&(key[8]), s2);
               strncpy (&(res[13]), &(p[2]), 11);
               memset (s2, 0, sizeof (s2));
       }

       return (res);
}
#endif

/* End of crypt16.c */
Commit	Line	Data
059ec3d9 PH	1	/* $Cambridge: exim/src/src/crypt16.c,v 1.1 2004/10/07 10:39:01 ph10 Exp $ */
	2
	3	/*
	4	* Copyright (c) 2000-2002
	5	* Chris Adams <cmadams@iruntheinter.net>
	6	* written for HiWAAY Internet Services
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
	21	* USA
	22	*/
	23
	24	/*
	25	* Adapted for Exim by Tamas TEVESZ <ice@extreme.hu>
	26	* Further adapted by Philip Hazel to cut out this function for operating
	27	* systems that have a built-in version.
	28	*/
	29
	30	/* The OS has a built-in crypt16(). Some compilers don't like compiling empty
	31	modules, so keep them happy with a dummy when skipping the rest. */
	32
	33	#include "config.h"
	34
	35	#ifdef HAVE_CRYPT16
	36	static void dummy(int x) { dummy(x-1); }
	37	#else
	38
	39	/* The OS doesn't have a built-in crypt16(). Compile this one. */
	40
	41	#include <unistd.h>
	42	#include <string.h>
	43	#include "os.h"
	44
	45	#ifdef CRYPT_H
	46	#include <crypt.h>
	47	#endif
	48
	49	char crypt16(char key, char *salt)
	50	{
	51	static char res[25];
	52	static char s2[3];
	53	char *p;
	54
	55	/* Clear the string of any previous data */
	56	memset (res, 0, sizeof (res));
	57
	58	/* crypt the first part */
	59	p = crypt (key, salt);
	60	strncpy (res, p, 13);
	61
	62	if (strlen (key) > 8)
	63	{
	64	/* crypt the rest
65	* the first two characters of the first block (not counting
66	* the salt) make up the new salt */
67	strncpy (s2, &(res[2]), 2);
68	p = crypt (&(key[8]), s2);
69	strncpy (&(res[13]), &(p[2]), 11);
70	memset (s2, 0, sizeof (s2));
71	}
72
73	return (res);
74	}
75	#endif
76
77	/* End of crypt16.c */