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-rw-r--r--modules/pam_tally/pam_tally.c735
1 files changed, 0 insertions, 735 deletions
diff --git a/modules/pam_tally/pam_tally.c b/modules/pam_tally/pam_tally.c
deleted file mode 100644
index 3da37f40..00000000
--- a/modules/pam_tally/pam_tally.c
+++ /dev/null
@@ -1,735 +0,0 @@
-/*
- * pam_tally.c
- *
- * $Id$
- */
-
-
-/* By Tim Baverstock <warwick@mmm.co.uk>, Multi Media Machine Ltd.
- * 5 March 1997
- *
- * Stuff stolen from pam_rootok and pam_listfile
- */
-
-#include <security/_pam_aconf.h>
-
-#if defined(MAIN) && defined(MEMORY_DEBUG)
-# undef exit
-#endif /* defined(MAIN) && defined(MEMORY_DEBUG) */
-
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <syslog.h>
-#include <pwd.h>
-#include <time.h>
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/param.h>
-#include "faillog.h"
-
-#ifndef TRUE
-#define TRUE 1L
-#define FALSE 0L
-#endif
-
-/*
- * here, we make a definition for the externally accessible function
- * in this file (this definition is required for static a module
- * but strongly encouraged generally) it is used to instruct the
- * modules include file to define the function prototypes.
- */
-
-#define PAM_SM_AUTH
-#define PAM_SM_ACCOUNT
-/* #define PAM_SM_SESSION */
-/* #define PAM_SM_PASSWORD */
-
-#include <security/pam_modules.h>
-
-/*---------------------------------------------------------------------*/
-
-#define DEFAULT_LOGFILE "/var/log/faillog"
-#define MODULE_NAME "pam_tally"
-
-enum TALLY_RESET {
- TALLY_RESET_DEFAULT,
- TALLY_RESET_RESET,
- TALLY_RESET_NO_RESET
-};
-
-#define tally_t unsigned short int
-#define TALLY_FMT "%hu"
-#define TALLY_HI ((tally_t)~0L)
-
-#define UID_FMT "%hu"
-
-#ifndef FILENAME_MAX
-# define FILENAME_MAX MAXPATHLEN
-#endif
-
-struct fail_s {
- struct faillog fs_faillog;
-#ifndef MAIN
- time_t fs_fail_time;
-#endif /* ndef MAIN */
-};
-
-/*---------------------------------------------------------------------*/
-
-/* some syslogging */
-
-static void _pam_log(int err, const char *format, ...)
-{
- va_list args;
- va_start(args, format);
-
-#ifdef MAIN
- vfprintf(stderr,format,args);
- fprintf(stderr,"\n");
-#else
- openlog(MODULE_NAME, LOG_CONS|LOG_PID, LOG_AUTH);
- vsyslog(err, format, args);
- closelog();
-#endif
- va_end(args);
-}
-
-/*---------------------------------------------------------------------*/
-
-/* --- Support function: get uid (and optionally username) from PAM or
- cline_user --- */
-
-#ifdef MAIN
-static char *cline_user=0; /* cline_user is used in the administration prog */
-#endif
-
-static int pam_get_uid( pam_handle_t *pamh, uid_t *uid, const char **userp )
- {
- const char *user;
- struct passwd *pw;
-
-#ifdef MAIN
- user = cline_user;
-#else
- pam_get_user( pamh, &user, NULL );
-#endif
-
- if ( !user || !*user ) {
- _pam_log(LOG_ERR, MODULE_NAME ": pam_get_uid; user?");
- return PAM_AUTH_ERR;
- }
-
- if ( ! ( pw = getpwnam( user ) ) ) {
- _pam_log(LOG_ERR,MODULE_NAME ": pam_get_uid; no such user %s",user);
- return PAM_USER_UNKNOWN;
- }
-
- if ( uid ) *uid = pw->pw_uid;
- if ( userp ) *userp = user;
- return PAM_SUCCESS;
- }
-
-/*---------------------------------------------------------------------*/
-
-/* --- Support function: open/create tallyfile and return tally for uid --- */
-
-/* If on entry *tally==TALLY_HI, tallyfile is opened READONLY */
-/* Otherwise, if on entry tallyfile doesn't exist, creation is attempted. */
-
-static int get_tally( tally_t *tally,
- uid_t uid,
- const char *filename,
- FILE **TALLY,
- struct fail_s *fsp)
- {
- struct stat fileinfo;
- int lstat_ret = lstat(filename,&fileinfo);
-
- if ( lstat_ret && *tally!=TALLY_HI ) {
- int oldmask = umask(077);
- *TALLY=fopen(filename, "a");
- /* Create file, or append-open in pathological case. */
- umask(oldmask);
- if ( !*TALLY ) {
- _pam_log(LOG_ALERT, "Couldn't create %s",filename);
- return PAM_AUTH_ERR;
- }
- lstat_ret = fstat(fileno(*TALLY),&fileinfo);
- fclose(*TALLY);
- }
-
- if ( lstat_ret ) {
- _pam_log(LOG_ALERT, "Couldn't stat %s",filename);
- return PAM_AUTH_ERR;
- }
-
- if((fileinfo.st_mode & S_IWOTH) || !S_ISREG(fileinfo.st_mode)) {
- /* If the file is world writable or is not a
- normal file, return error */
- _pam_log(LOG_ALERT,
- "%s is either world writable or not a normal file",
- filename);
- return PAM_AUTH_ERR;
- }
-
- if ( ! ( *TALLY = fopen(filename,(*tally!=TALLY_HI)?"r+":"r") ) ) {
- _pam_log(LOG_ALERT, "Error opening %s for update", filename);
-
-/* Discovering why account service fails: e/uid are target user.
- *
- * perror(MODULE_NAME);
- * fprintf(stderr,"uid %d euid %d\n",getuid(), geteuid());
- */
- return PAM_AUTH_ERR;
- }
-
- if ( fseek( *TALLY, uid * sizeof(struct faillog), SEEK_SET ) ) {
- _pam_log(LOG_ALERT, "fseek failed %s", filename);
- return PAM_AUTH_ERR;
- }
-
- if ( fileinfo.st_size <= uid * sizeof(struct faillog) ) {
-
- memset(fsp, 0, sizeof(struct faillog));
- *tally=0;
- fsp->fs_faillog.fail_time = time(NULL);
-
- } else if (( fread((char *) &fsp->fs_faillog,
- sizeof(struct faillog), 1, *TALLY) )==0 ) {
-
- *tally=0; /* Assuming a gappy filesystem */
-
- } else {
-
- *tally = fsp->fs_faillog.fail_cnt;
-
- }
-
- return PAM_SUCCESS;
- }
-
-/*---------------------------------------------------------------------*/
-
-/* --- Support function: update and close tallyfile with tally!=TALLY_HI --- */
-
-static int set_tally( tally_t tally,
- uid_t uid,
- const char *filename,
- FILE **TALLY,
- struct fail_s *fsp)
- {
- if ( tally!=TALLY_HI )
- {
- if ( fseek( *TALLY, uid * sizeof(struct faillog), SEEK_SET ) ) {
- _pam_log(LOG_ALERT, "fseek failed %s", filename);
- return PAM_AUTH_ERR;
- }
- fsp->fs_faillog.fail_cnt = tally;
- if (fwrite((char *) &fsp->fs_faillog,
- sizeof(struct faillog), 1, *TALLY)==0 ) {
- _pam_log(LOG_ALERT, "tally update (fwrite) failed.", filename);
- return PAM_AUTH_ERR;
- }
- }
-
- if ( fclose(*TALLY) ) {
- _pam_log(LOG_ALERT, "tally update (fclose) failed.", filename);
- return PAM_AUTH_ERR;
- }
- *TALLY=NULL;
- return PAM_SUCCESS;
- }
-
-/*---------------------------------------------------------------------*/
-
-/* --- PAM bits --- */
-
-#ifndef MAIN
-
-#define PAM_FUNCTION(name) \
- PAM_EXTERN int name (pam_handle_t *pamh,int flags,int argc,const char **argv)
-
-#define RETURN_ERROR(i) return ((fail_on_error)?(i):(PAM_SUCCESS))
-
-/*---------------------------------------------------------------------*/
-
-/* --- tally bump function: bump tally for uid by (signed) inc --- */
-
-static int tally_bump (int inc,
- pam_handle_t *pamh,
- int flags,
- int argc,
- const char **argv) {
- uid_t uid;
-
- int
- fail_on_error = FALSE;
- tally_t
- tally = 0; /* !TALLY_HI --> Log opened for update */
-
- char
- no_magic_root = FALSE;
-
- char
- filename[ FILENAME_MAX ] = DEFAULT_LOGFILE;
-
- /* Should probably decode the parameters before anything else. */
-
- {
- for ( ; argc-- > 0; ++argv ) {
-
- /* generic options.. um, ignored. :] */
-
- if ( ! strcmp( *argv, "no_magic_root" ) ) {
- no_magic_root = TRUE;
- }
- else if ( ! strncmp( *argv, "file=", 5 ) ) {
- char const
- *from = (*argv)+5;
- char
- *to = filename;
- if ( *from!='/' || strlen(from)>FILENAME_MAX-1 ) {
- _pam_log(LOG_ERR,
- MODULE_NAME ": filename not /rooted or too long; ",
- *argv);
- RETURN_ERROR( PAM_AUTH_ERR );
- }
- while ( ( *to++ = *from++ ) );
- }
- else if ( ! strcmp( *argv, "onerr=fail" ) ) {
- fail_on_error=TRUE;
- }
- else if ( ! strcmp( *argv, "onerr=succeed" ) ) {
- fail_on_error=FALSE;
- }
- else {
- _pam_log(LOG_ERR, MODULE_NAME ": unknown option; %s",*argv);
- }
- } /* for() */
- }
-
- {
- FILE
- *TALLY = NULL;
- const char
- *user = NULL,
- *remote_host = NULL,
- *cur_tty = NULL;
- struct fail_s fs, *fsp = &fs;
-
- int i=pam_get_uid(pamh, &uid, &user);
- if ( i != PAM_SUCCESS ) RETURN_ERROR( i );
-
- i=get_tally( &tally, uid, filename, &TALLY, fsp );
-
- /* to remember old fail time (for locktime) */
- fsp->fs_fail_time = fsp->fs_faillog.fail_time;
- fsp->fs_faillog.fail_time = time(NULL);
- (void) pam_get_item(pamh, PAM_RHOST, (const void **)&remote_host);
- if (!remote_host) {
-
- (void) pam_get_item(pamh, PAM_TTY, (const void **)&cur_tty);
- if (!cur_tty) {
- strncpy(fsp->fs_faillog.fail_line, "unknown",
- sizeof(fsp->fs_faillog.fail_line) - 1);
- fsp->fs_faillog.fail_line[sizeof(fsp->fs_faillog.fail_line)-1] = 0;
- } else {
- strncpy(fsp->fs_faillog.fail_line, cur_tty,
- sizeof(fsp->fs_faillog.fail_line)-1);
- fsp->fs_faillog.fail_line[sizeof(fsp->fs_faillog.fail_line)-1] = 0;
- }
-
- } else {
- strncpy(fsp->fs_faillog.fail_line, remote_host,
- (size_t)sizeof(fsp->fs_faillog.fail_line));
- fsp->fs_faillog.fail_line[sizeof(fsp->fs_faillog.fail_line)-1] = 0;
- }
- if ( i != PAM_SUCCESS ) { if (TALLY) fclose(TALLY); RETURN_ERROR( i ); }
-
- if ( no_magic_root || getuid() ) { /* no_magic_root kills uid test */
-
- tally+=inc;
-
- if ( tally==TALLY_HI ) { /* Overflow *and* underflow. :) */
- tally-=inc;
- _pam_log(LOG_ALERT,"Tally %sflowed for user %s",
- (inc<0)?"under":"over",user);
- }
- }
-
- i=set_tally( tally, uid, filename, &TALLY, fsp );
- if ( i != PAM_SUCCESS ) { if (TALLY) fclose(TALLY); RETURN_ERROR( i ); }
- }
-
- return PAM_SUCCESS;
-}
-
-/*---------------------------------------------------------------------*/
-
-/* --- authentication management functions (only) --- */
-
-#ifdef PAM_SM_AUTH
-
-PAM_FUNCTION( pam_sm_authenticate ) {
- return tally_bump( 1, pamh, flags, argc, argv);
-}
-
-/* --- Seems to need this function. Ho hum. --- */
-
-PAM_FUNCTION( pam_sm_setcred ) { return PAM_SUCCESS; }
-
-#endif
-
-/*---------------------------------------------------------------------*/
-
-/* --- session management functions (only) --- */
-
-/*
- * Unavailable until .so files can be suid
- */
-
-#ifdef PAM_SM_SESSION
-
-/* To maintain a balance-tally of successful login/outs */
-
-PAM_FUNCTION( pam_sm_open_session ) {
- return tally_bump( 1, pamh, flags, argc, argv);
-}
-
-PAM_FUNCTION( pam_sm_close_session ) {
- return tally_bump(-1, pamh, flags, argc, argv);
-}
-
-#endif
-
-/*---------------------------------------------------------------------*/
-
-/* --- authentication management functions (only) --- */
-
-#ifdef PAM_SM_AUTH
-
-/* To lock out a user with an unacceptably high tally */
-
-PAM_FUNCTION( pam_sm_acct_mgmt ) {
- uid_t
- uid;
-
- int
- fail_on_error = FALSE;
- tally_t
- deny = 0;
- tally_t
- tally = 0; /* !TALLY_HI --> Log opened for update */
-
- char
- no_magic_root = FALSE,
- even_deny_root_account = FALSE;
- char per_user = FALSE; /* if true then deny=.fail_max for user */
- char no_lock_time = FALSE; /* if true then don't use .fail_locktime */
-
- const char
- *user = NULL;
-
- enum TALLY_RESET
- reset = TALLY_RESET_DEFAULT;
-
- char
- filename[ FILENAME_MAX ] = DEFAULT_LOGFILE;
-
- /* Should probably decode the parameters before anything else. */
-
- {
- for ( ; argc-- > 0; ++argv ) {
-
- /* generic options.. um, ignored. :] */
-
- if ( ! strcmp( *argv, "no_magic_root" ) ) {
- no_magic_root = TRUE;
- }
- else if ( ! strcmp( *argv, "even_deny_root_account" ) ) {
- even_deny_root_account = TRUE;
- }
- else if ( ! strcmp( *argv, "reset" ) ) {
- reset = TALLY_RESET_RESET;
- }
- else if ( ! strcmp( *argv, "no_reset" ) ) {
- reset = TALLY_RESET_NO_RESET;
- }
- else if ( ! strncmp( *argv, "file=", 5 ) ) {
- char const
- *from = (*argv)+5;
- char
- *to = filename;
- if ( *from != '/' || strlen(from) > FILENAME_MAX-1 ) {
- _pam_log(LOG_ERR,
- MODULE_NAME ": filename not /rooted or too long; ",
- *argv);
- RETURN_ERROR( PAM_AUTH_ERR );
- }
- while ( ( *to++ = *from++ ) );
- }
- else if ( ! strncmp( *argv, "deny=", 5 ) ) {
- if ( sscanf((*argv)+5,TALLY_FMT,&deny) != 1 ) {
- _pam_log(LOG_ERR,"bad number supplied; %s",*argv);
- RETURN_ERROR( PAM_AUTH_ERR );
- }
- }
- else if ( ! strcmp( *argv, "onerr=fail" ) ) {
- fail_on_error=TRUE;
- }
- else if ( ! strcmp( *argv, "onerr=succeed" ) ) {
- fail_on_error=FALSE;
- }
- else if ( ! strcmp( *argv, "per_user" ) )
- {
- per_user = TRUE;
- }
- else if ( ! strcmp( *argv, "no_lock_time") )
- {
- no_lock_time = TRUE;
- }
- else {
- _pam_log(LOG_ERR, MODULE_NAME ": unknown option; %s",*argv);
- }
- } /* for() */
- }
-
- {
- struct fail_s fs, *fsp = &fs;
- FILE *TALLY=0;
- int i=pam_get_uid(pamh, &uid, &user);
- if ( i != PAM_SUCCESS ) RETURN_ERROR( i );
-
- i=get_tally( &tally, uid, filename, &TALLY, fsp );
- if ( i != PAM_SUCCESS ) { if (TALLY) fclose(TALLY); RETURN_ERROR( i ); }
-
- if ( no_magic_root || getuid() ) { /* no_magic_root kills uid test */
-
- /* To deny or not to deny; that is the question */
-
- /* if there's .fail_max entry and per_user=TRUE then deny=.fail_max */
-
- if ( (fsp->fs_faillog.fail_max) && (per_user) ) {
- deny = fsp->fs_faillog.fail_max;
- }
- if (fsp->fs_faillog.fail_locktime && fsp->fs_fail_time
- && (!no_lock_time) )
- {
- if ( (fsp->fs_faillog.fail_locktime + fsp->fs_fail_time) > time(NULL) )
- {
- _pam_log(LOG_NOTICE,
- "user %s ("UID_FMT") has time limit [%lds left]"
- " since last failure.",
- user,uid,
- fsp->fs_fail_time+fsp->fs_faillog.fail_locktime
- -time(NULL));
- return PAM_AUTH_ERR;
- }
- }
- if (
- ( deny != 0 ) && /* deny==0 means no deny */
- ( tally > deny ) && /* tally>deny means exceeded */
- ( even_deny_root_account || uid ) /* even_deny stops uid check */
- ) {
- _pam_log(LOG_NOTICE,"user %s ("UID_FMT") tally "TALLY_FMT", deny "TALLY_FMT,
- user, uid, tally, deny);
- return PAM_AUTH_ERR; /* Only unconditional failure */
- }
-
- /* resets for explicit reset
- * or by default if deny exists and not magic-root
- */
-
- if ( ( reset == TALLY_RESET_RESET ) ||
- ( reset == TALLY_RESET_DEFAULT && deny ) ) { tally=0; }
- }
- else /* is magic root */ {
-
- /* Magic root skips deny test... */
-
- /* Magic root only resets on explicit reset, regardless of deny */
-
- if ( reset == TALLY_RESET_RESET ) { tally=0; }
- }
- if (tally == 0)
- {
- fsp->fs_faillog.fail_time = (time_t) 0;
- strcpy(fsp->fs_faillog.fail_line, "");
- }
- i=set_tally( tally, uid, filename, &TALLY, fsp );
- if ( i != PAM_SUCCESS ) { if (TALLY) fclose(TALLY); RETURN_ERROR( i ); }
- }
-
- return PAM_SUCCESS;
-}
-
-#endif /* #ifdef PAM_SM_AUTH */
-
-/*-----------------------------------------------------------------------*/
-
-#ifdef PAM_STATIC
-
-/* static module data */
-
-struct pam_module _pam_tally_modstruct = {
- MODULE_NAME,
-#ifdef PAM_SM_AUTH
- pam_sm_authenticate,
- pam_sm_setcred,
-#else
- NULL,
- NULL,
-#endif
-#ifdef PAM_SM_ACCOUNT
- pam_sm_acct_mgmt,
-#else
- NULL,
-#endif
-#ifdef PAM_SM_SESSION
- pam_sm_open_session,
- pam_sm_close_session,
-#else
- NULL,
- NULL,
-#endif
-#ifdef PAM_SM_PASSWORD
- pam_sm_chauthtok,
-#else
- NULL,
-#endif
-};
-
-#endif /* #ifdef PAM_STATIC */
-
-/*-----------------------------------------------------------------------*/
-
-#else /* #ifndef MAIN */
-
-static const char *cline_filename = DEFAULT_LOGFILE;
-static tally_t cline_reset = TALLY_HI; /* Default is `interrogate only' */
-static int cline_quiet = 0;
-
-/*
- * Not going to link with pamlib just for these.. :)
- */
-
-static const char * pam_errors( int i ) {
- switch (i) {
- case PAM_AUTH_ERR: return "Authentication error";
- case PAM_SERVICE_ERR: return "Service error";
- case PAM_USER_UNKNOWN: return "Unknown user";
- default: return "Unknown error";
- }
-}
-
-static int getopts( int argc, char **argv ) {
- const char *pname = *argv;
- for ( ; *argv ; (void)(*argv && ++argv) ) {
- if ( !strcmp (*argv,"--file") ) cline_filename=*++argv;
- else if ( !strncmp(*argv,"--file=",7) ) cline_filename=*argv+7;
- else if ( !strcmp (*argv,"--user") ) cline_user=*++argv;
- else if ( !strncmp(*argv,"--user=",7) ) cline_user=*argv+7;
- else if ( !strcmp (*argv,"--reset") ) cline_reset=0;
- else if ( !strncmp(*argv,"--reset=",8)) {
- if ( sscanf(*argv+8,TALLY_FMT,&cline_reset) != 1 )
- fprintf(stderr,"%s: Bad number given to --reset=\n",pname), exit(0);
- }
- else if ( !strcmp (*argv,"--quiet") ) cline_quiet=1;
- else {
- fprintf(stderr,"%s: Unrecognised option %s\n",pname,*argv);
- return FALSE;
- }
- }
- return TRUE;
-}
-
-int main ( int argc, char **argv ) {
-
- struct fail_s fs, *fsp = &fs;
-
- if ( ! getopts( argc, argv+1 ) ) {
- printf("%s: [--file rooted-filename] [--user username] "
- "[--reset[=n]] [--quiet]\n",
- *argv);
- exit(0);
- }
-
- umask(077);
-
- /*
- * Major difference between individual user and all users:
- * --user just handles one user, just like PAM.
- * --user=* handles all users, sniffing cline_filename for nonzeros
- */
-
- if ( cline_user ) {
- uid_t uid;
- tally_t tally=cline_reset;
- FILE *TALLY=0;
- int i=pam_get_uid( NULL, &uid, NULL);
- if ( i != PAM_SUCCESS ) {
- fprintf(stderr,"%s: %s\n",*argv,pam_errors(i));
- exit(0);
- }
-
- i=get_tally( &tally, uid, cline_filename, &TALLY, fsp );
- if ( i != PAM_SUCCESS ) {
- if (TALLY) fclose(TALLY);
- fprintf(stderr,"%s: %s\n",*argv,pam_errors(i));
- exit(0);
- }
-
- if ( !cline_quiet )
- printf("User %s\t("UID_FMT")\t%s "TALLY_FMT"\n",cline_user,uid,
- (cline_reset!=TALLY_HI)?"had":"has",tally);
-
- i=set_tally( cline_reset, uid, cline_filename, &TALLY, fsp );
- if ( i != PAM_SUCCESS ) {
- if (TALLY) fclose(TALLY);
- fprintf(stderr,"%s: %s\n",*argv,pam_errors(i));
- exit(0);
- }
- }
- else /* !cline_user (ie, operate on all users) */ {
- FILE *TALLY=fopen(cline_filename, "r");
- uid_t uid=0;
- if ( !TALLY ) perror(*argv), exit(0);
-
- for ( ; !feof(TALLY); uid++ ) {
- tally_t tally;
- struct passwd *pw;
- if ( ! fread((char *) &fsp->fs_faillog,
- sizeof (struct faillog), 1, TALLY)
- || ! fsp->fs_faillog.fail_cnt ) {
- continue;
- }
- tally = fsp->fs_faillog.fail_cnt;
-
- if ( ( pw=getpwuid(uid) ) ) {
- printf("User %s\t("UID_FMT")\t%s "TALLY_FMT"\n",pw->pw_name,uid,
- (cline_reset!=TALLY_HI)?"had":"has",tally);
- }
- else {
- printf("User [NONAME]\t("UID_FMT")\t%s "TALLY_FMT"\n",uid,
- (cline_reset!=TALLY_HI)?"had":"has",tally);
- }
- }
- fclose(TALLY);
- if ( cline_reset!=0 && cline_reset!=TALLY_HI ) {
- fprintf(stderr,"%s: Can't reset all users to non-zero\n",*argv);
- }
- else if ( !cline_reset ) {
- TALLY=fopen(cline_filename, "w");
- if ( !TALLY ) perror(*argv), exit(0);
- fclose(TALLY);
- }
- }
- return 0;
-}
-
-
-#endif
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