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/* =======================================================================
* Copyright 1996, Jan D. Wolter and Steven R. Weiss, All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The names of the authors must not be used to endorse or
* promote products derived from this software without prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* =======================================================================
*/
#include "pwauth.h"
#ifdef RESET_FAIL_COUNT
#define MODE_FAILLOG O_RDWR
#else
#define MODE_FAILLOG O_RDONLY
#endif
#ifdef FAILLOG_JFH
/* CHECK_FAILS - Check if the account is disable dued to the maximum number of
* failed logins being exceeded. Returns true if the account is OK to log
* into or if the faillog information doesn't exist. This never resets the
* bad login count to zero. It should, but I don't really believe anyone
* uses this anymore, so I'm not going to bother implementing that.
*/
int check_fails()
{
int result= 1;
struct faillog flog;
int flfd;
if (!haveuid) return 1;
if ((flfd= open(PATH_FAILLOG,MODE_FAILLOG)) >= 0)
{
lseek(flfd, hisuid * sizeof(struct faillog), 0);
result= (read(flfd, &flog, sizeof(struct faillog))
!= sizeof(struct faillog)) ||
flog.fail_max == 0 || flog.fail_cur < flog.fail_max;
close(flfd);
}
return result;
}
/* LOG_FAILURE - Do whatever we need to do to log a failed login attempt.
*/
void log_failure()
{
int flfd;
struct faillog flog;
if (!haveuid) return;
/* Log the failure in /var/adm/faillog - JFH style */
if ((flfd= open(PATH_FAILLOG,O_RDWR)) > 0)
{
/* Read the user's record (indexed by uid) */
lseek(flfd, hisuid * sizeof(struct faillog), 0);
if (read(flfd,&flog,sizeof(struct faillog)) != sizeof(struct faillog))
{
flog.fail_cnt= 0;
flog.fail_max= 0;
flog.fail_time= 0L;
flog.failline[0]= '\0';
}
/* Increment the count (checking for overflow) */
if (flog.fail_cnt + 1 > 0)
flog.fail_cnt++;
flog.fail_time= time(0L);
strcpy(flog.fail_line,"http");
/* Write it back out */
lseek(flfd, hisuid * sizeof(struct faillog), 0);
write(flfd, &flog, sizeof(struct faillog));
close(flfd);
}
}
#endif /* FAILLOG_JFH */
#ifdef FAILLOG_OPENBSD
/* CHECK_FAILS - Check if the account is disabled due to the maximum number of
* failed logins being exceeded. Returns true if the account is OK to log
* into or if the faillog information doesn't exist. If the count has not
* been exceeded, then the count is reset to zero.
*/
int check_fails()
{
int result= 1;
#if defined(MAX_FAIL_COUNT) || defined(RESET_FAIL_COUNT)
struct badlogin flog;
int flfd;
if (!haveuid) return 1;
if ((flfd= open(PATH_FAILLOG,MODE_FAILLOG)) >= 0)
{
/* Read user's record (indexed by uid) */
lseek(flfd, hisuid * sizeof(struct badlogin), 0);
if (read(flfd, &flog, sizeof(struct badlogin)) !=
sizeof(struct badlogin) || flog.bl_time == 0)
memset(&flog, 0, sizeof(struct badlogin));
#ifdef MAX_FAIL_COUNT
result= (flog.count < MAX_FAIL_COUNT);
#endif
#ifdef RESET_FAIL_COUNT
if (result && flog.count > 0)
{
flog.count= 0;
lseek(flfd, hisuid * sizeof(struct badlogin), 0);
write(flfd, &flog, sizeof(struct badlogin));
}
#endif
close(flfd);
}
#endif /* MAX_FAIL_COUNT || RESET_FAIL_COUNT */
return result;
}
/* LOG_FAILURE - Do whatever we need to do to log a failed login attempt.
*/
log_failure()
{
int flfd;
struct badlogin flog;
char *host;
if (!haveuid) return;
/* Log the failure in /var/log/failedlogin - OpenBSD style */
if ((flfd= open(PATH_FAILLOG,O_RDWR)) > 0)
{
/* Read user's record (indexed by uid) */
lseek(flfd, hisuid * sizeof(struct badlogin), 0);
if (read(flfd, &flog, sizeof(struct badlogin)) !=
sizeof(struct badlogin) || flog.bl_time == 0)
memset(&flog, 0, sizeof(struct badlogin));
/* Increment the count (checking for overflow) */
if (flog.count + 1 > 0)
flog.count++;
/* Set time and remote host names */
time(&flog.bl_time);
strncpy(flog.bl_line, "http", sizeof(flog.bl_line));
if ((host= getenv("HOST")) == NULL) host= getenv("IP");
if (host != NULL)
strncpy(flog.bl_host, host, sizeof(flog.bl_host));
else
flog.bl_host[0]= '\0';
flog.bl_name[0]= '\0'; /* Remote name always unknown */
/* Write it back out */
lseek(flfd, hisuid * sizeof(struct badlogin), 0);
write(flfd, &flog, sizeof(struct badlogin));
close(flfd);
}
}
#endif
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