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-rw-r--r--modules/pam_time/pam_time.c687
1 files changed, 0 insertions, 687 deletions
diff --git a/modules/pam_time/pam_time.c b/modules/pam_time/pam_time.c
deleted file mode 100644
index 8e3b2486..00000000
--- a/modules/pam_time/pam_time.c
+++ /dev/null
@@ -1,687 +0,0 @@
-/* pam_time module */
-
-/*
- * Written by Andrew Morgan <morgan@linux.kernel.org> 1996/6/22
- * (File syntax and much other inspiration from the shadow package
- * shadow-960129)
- */
-
-#include "config.h"
-
-#include <sys/file.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <ctype.h>
-#include <unistd.h>
-#include <stdarg.h>
-#include <time.h>
-#include <syslog.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <netdb.h>
-
-#ifdef HAVE_LIBAUDIT
-#include <libaudit.h>
-#endif
-
-#define PAM_TIME_BUFLEN 1000
-#define FIELD_SEPARATOR ';' /* this is new as of .02 */
-
-#define PAM_DEBUG_ARG 0x0001
-#define PAM_NO_AUDIT 0x0002
-
-#ifndef TRUE
-# define TRUE 1
-#endif
-#ifndef FALSE
-# define FALSE 0
-#endif
-
-typedef enum { AND, OR } operator;
-
-/*
- * here, we make definitions for the externally accessible functions
- * in this file (these definitions are required for static modules
- * but strongly encouraged generally) they are used to instruct the
- * modules include file to define their prototypes.
- */
-
-#define PAM_SM_ACCOUNT
-
-#include <security/_pam_macros.h>
-#include <security/pam_modules.h>
-#include <security/pam_ext.h>
-#include <security/pam_modutil.h>
-
-static int
-_pam_parse (const pam_handle_t *pamh, int argc, const char **argv)
-{
- int ctrl = 0;
-
- /* step through arguments */
- for (; argc-- > 0; ++argv) {
-
- /* generic options */
-
- if (!strcmp(*argv, "debug")) {
- ctrl |= PAM_DEBUG_ARG;
- } else if (!strcmp(*argv, "noaudit")) {
- ctrl |= PAM_NO_AUDIT;
- } else {
- pam_syslog(pamh, LOG_ERR, "unknown option: %s", *argv);
- }
- }
-
- return ctrl;
-}
-
-/* --- static functions for checking whether the user should be let in --- */
-
-static void
-shift_bytes(char *mem, int from, int by)
-{
- while (by-- > 0) {
- *mem = mem[from];
- ++mem;
- }
-}
-
-static int
-read_field(const pam_handle_t *pamh, int fd, char **buf, int *from, int *to)
-{
- /* is buf set ? */
-
- if (! *buf) {
- *buf = (char *) malloc(PAM_TIME_BUFLEN);
- if (! *buf) {
- pam_syslog(pamh, LOG_ERR, "out of memory");
- D(("no memory"));
- return -1;
- }
- *from = *to = 0;
- fd = open(PAM_TIME_CONF, O_RDONLY);
- }
-
- /* do we have a file open ? return error */
-
- if (fd < 0 && *to <= 0) {
- pam_syslog(pamh, LOG_ERR, "error opening %s: %m", PAM_TIME_CONF);
- memset(*buf, 0, PAM_TIME_BUFLEN);
- _pam_drop(*buf);
- return -1;
- }
-
- /* check if there was a newline last time */
-
- if ((*to > *from) && (*to > 0)
- && ((*buf)[*from] == '\0')) { /* previous line ended */
- (*from)++;
- (*buf)[0] = '\0';
- return fd;
- }
-
- /* ready for more data: first shift the buffer's remaining data */
-
- *to -= *from;
- shift_bytes(*buf, *from, *to);
- *from = 0;
- (*buf)[*to] = '\0';
-
- while (fd >= 0 && *to < PAM_TIME_BUFLEN) {
- int i;
-
- /* now try to fill the remainder of the buffer */
-
- i = read(fd, *to + *buf, PAM_TIME_BUFLEN - *to);
- if (i < 0) {
- pam_syslog(pamh, LOG_ERR, "error reading %s: %m", PAM_TIME_CONF);
- close(fd);
- return -1;
- } else if (!i) {
- close(fd);
- fd = -1; /* end of file reached */
- } else
- *to += i;
-
- /*
- * contract the buffer. Delete any comments, and replace all
- * multiple spaces with single commas
- */
-
- i = 0;
-#ifdef DEBUG_DUMP
- D(("buffer=<%s>",*buf));
-#endif
- while (i < *to) {
- if ((*buf)[i] == ',') {
- int j;
-
- for (j=++i; j<*to && (*buf)[j] == ','; ++j);
- if (j!=i) {
- shift_bytes(i + (*buf), j-i, (*to) - j);
- *to -= j-i;
- }
- }
- switch ((*buf)[i]) {
- int j,c;
- case '#':
- c = 0;
- for (j=i; j < *to && (c = (*buf)[j]) != '\n'; ++j);
- if (j >= *to) {
- (*buf)[*to = ++i] = '\0';
- } else if (c == '\n') {
- shift_bytes(i + (*buf), j-i, (*to) - j);
- *to -= j-i;
- ++i;
- } else {
- pam_syslog(pamh, LOG_CRIT,
- "internal error in file %s at line %d",
- __FILE__, __LINE__);
- close(fd);
- return -1;
- }
- break;
- case '\\':
- if ((*buf)[i+1] == '\n') {
- shift_bytes(i + *buf, 2, *to - (i+2));
- *to -= 2;
- } else {
- ++i; /* we don't escape non-newline characters */
- }
- break;
- case '!':
- case ' ':
- case '\t':
- if ((*buf)[i] != '!')
- (*buf)[i] = ',';
- /* delete any trailing spaces */
- for (j=++i; j < *to && ( (c = (*buf)[j]) == ' '
- || c == '\t' ); ++j);
- shift_bytes(i + *buf, j-i, (*to)-j );
- *to -= j-i;
- break;
- default:
- ++i;
- }
- }
- }
-
- (*buf)[*to] = '\0';
-
- /* now return the next field (set the from/to markers) */
- {
- int i;
-
- for (i=0; i<*to; ++i) {
- switch ((*buf)[i]) {
- case '#':
- case '\n': /* end of the line/file */
- (*buf)[i] = '\0';
- *from = i;
- return fd;
- case FIELD_SEPARATOR: /* end of the field */
- (*buf)[i] = '\0';
- *from = ++i;
- return fd;
- }
- }
- *from = i;
- (*buf)[*from] = '\0';
- }
-
- if (*to <= 0) {
- D(("[end of text]"));
- *buf = NULL;
- }
-
- return fd;
-}
-
-/* read a member from a field */
-
-static int
-logic_member(const char *string, int *at)
-{
- int c,to;
- int done=0;
- int token=0;
-
- to=*at;
- do {
- c = string[to++];
-
- switch (c) {
-
- case '\0':
- --to;
- done = 1;
- break;
-
- case '&':
- case '|':
- case '!':
- if (token) {
- --to;
- }
- done = 1;
- break;
-
- default:
- if (isalpha(c) || c == '*' || isdigit(c) || c == '_'
- || c == '-' || c == '.' || c == '/' || c == ':') {
- token = 1;
- } else if (token) {
- --to;
- done = 1;
- } else {
- ++*at;
- }
- }
- } while (!done);
-
- return to - *at;
-}
-
-typedef enum { VAL, OP } expect;
-
-static int
-logic_field(pam_handle_t *pamh, const void *me, const char *x, int rule,
- int (*agrees)(pam_handle_t *pamh,
- const void *, const char *, int, int))
-{
- int left=FALSE, right, not=FALSE;
- operator oper=OR;
- int at=0, l;
- expect next=VAL;
-
- while ((l = logic_member(x,&at))) {
- int c = x[at];
-
- if (next == VAL) {
- if (c == '!')
- not = !not;
- else if (isalpha(c) || c == '*' || isdigit(c) || c == '_'
- || c == '-' || c == '.' || c == '/' || c == ':') {
- right = not ^ agrees(pamh, me, x+at, l, rule);
- if (oper == AND)
- left &= right;
- else
- left |= right;
- next = OP;
- } else {
- pam_syslog(pamh, LOG_ERR,
- "garbled syntax; expected name (rule #%d)",
- rule);
- return FALSE;
- }
- } else { /* OP */
- switch (c) {
- case '&':
- oper = AND;
- break;
- case '|':
- oper = OR;
- break;
- default:
- pam_syslog(pamh, LOG_ERR,
- "garbled syntax; expected & or | (rule #%d)",
- rule);
- D(("%c at %d",c,at));
- return FALSE;
- }
- next = VAL;
- }
- at += l;
- }
-
- return left;
-}
-
-static int
-is_same(pam_handle_t *pamh UNUSED, const void *A, const char *b,
- int len, int rule UNUSED)
-{
- int i;
- const char *a;
-
- a = A;
- for (i=0; len > 0; ++i, --len) {
- if (b[i] != a[i]) {
- if (b[i++] == '*') {
- return (!--len || !strncmp(b+i,a+strlen(a)-len,len));
- } else
- return FALSE;
- }
- }
-
- /* Ok, we know that b is a substring from A and does not contain
- wildcards, but now the length of both strings must be the same,
- too. */
- if (strlen (a) != strlen(b))
- return FALSE;
-
- return ( !len );
-}
-
-typedef struct {
- int day; /* array of 7 bits, one set for today */
- int minute; /* integer, hour*100+minute for now */
-} TIME;
-
-static struct day {
- const char *d;
- int bit;
-} const days[11] = {
- { "su", 01 },
- { "mo", 02 },
- { "tu", 04 },
- { "we", 010 },
- { "th", 020 },
- { "fr", 040 },
- { "sa", 0100 },
- { "wk", 076 },
- { "wd", 0101 },
- { "al", 0177 },
- { NULL, 0 }
-};
-
-static TIME
-time_now(void)
-{
- struct tm *local;
- time_t the_time;
- TIME this;
-
- the_time = time((time_t *)0); /* get the current time */
- local = localtime(&the_time);
- this.day = days[local->tm_wday].bit;
- this.minute = local->tm_hour*100 + local->tm_min;
-
- D(("day: 0%o, time: %.4d", this.day, this.minute));
- return this;
-}
-
-/* take the current date and see if the range "date" passes it */
-static int
-check_time(pam_handle_t *pamh, const void *AT, const char *times,
- int len, int rule)
-{
- int not,pass;
- int marked_day, time_start, time_end;
- const TIME *at;
- int i,j=0;
-
- at = AT;
- D(("chcking: 0%o/%.4d vs. %s", at->day, at->minute, times));
-
- if (times == NULL) {
- /* this should not happen */
- pam_syslog(pamh, LOG_CRIT,
- "internal error in file %s at line %d",
- __FILE__, __LINE__);
- return FALSE;
- }
-
- if (times[j] == '!') {
- ++j;
- not = TRUE;
- } else {
- not = FALSE;
- }
-
- for (marked_day = 0; len > 0 && isalpha(times[j]); --len) {
- int this_day=-1;
-
- D(("%c%c ?", times[j], times[j+1]));
- for (i=0; days[i].d != NULL; ++i) {
- if (tolower(times[j]) == days[i].d[0]
- && tolower(times[j+1]) == days[i].d[1] ) {
- this_day = days[i].bit;
- break;
- }
- }
- j += 2;
- if (this_day == -1) {
- pam_syslog(pamh, LOG_ERR, "bad day specified (rule #%d)", rule);
- return FALSE;
- }
- marked_day ^= this_day;
- }
- if (marked_day == 0) {
- pam_syslog(pamh, LOG_ERR, "no day specified");
- return FALSE;
- }
- D(("day range = 0%o", marked_day));
-
- time_start = 0;
- for (i=0; len > 0 && i < 4 && isdigit(times[i+j]); ++i, --len) {
- time_start *= 10;
- time_start += times[i+j]-'0'; /* is this portable? */
- }
- j += i;
-
- if (times[j] == '-') {
- time_end = 0;
- for (i=1; len > 0 && i < 5 && isdigit(times[i+j]); ++i, --len) {
- time_end *= 10;
- time_end += times[i+j]-'0'; /* is this portable */
- }
- j += i;
- } else
- time_end = -1;
-
- D(("i=%d, time_end=%d, times[j]='%c'", i, time_end, times[j]));
- if (i != 5 || time_end == -1) {
- pam_syslog(pamh, LOG_ERR, "no/bad times specified (rule #%d)", rule);
- return TRUE;
- }
- D(("times(%d to %d)", time_start,time_end));
- D(("marked_day = 0%o", marked_day));
-
- /* compare with the actual time now */
-
- pass = FALSE;
- if (time_start < time_end) { /* start < end ? --> same day */
- if ((at->day & marked_day) && (at->minute >= time_start)
- && (at->minute < time_end)) {
- D(("time is listed"));
- pass = TRUE;
- }
- } else { /* spans two days */
- if ((at->day & marked_day) && (at->minute >= time_start)) {
- D(("caught on first day"));
- pass = TRUE;
- } else {
- marked_day <<= 1;
- marked_day |= (marked_day & 0200) ? 1:0;
- D(("next day = 0%o", marked_day));
- if ((at->day & marked_day) && (at->minute <= time_end)) {
- D(("caught on second day"));
- pass = TRUE;
- }
- }
- }
-
- return (not ^ pass);
-}
-
-static int
-check_account(pam_handle_t *pamh, const char *service,
- const char *tty, const char *user)
-{
- int from=0,to=0,fd=-1;
- char *buffer=NULL;
- int count=0;
- TIME here_and_now;
- int retval=PAM_SUCCESS;
-
- here_and_now = time_now(); /* find current time */
- do {
- int good=TRUE,intime;
-
- /* here we get the service name field */
-
- fd = read_field(pamh, fd, &buffer, &from, &to);
-
- if (!buffer || !buffer[0]) {
- /* empty line .. ? */
- continue;
- }
- ++count;
-
- good = logic_field(pamh, service, buffer, count, is_same);
- D(("with service: %s", good ? "passes":"fails" ));
-
- /* here we get the terminal name field */
-
- fd = read_field(pamh, fd, &buffer, &from, &to);
- if (!buffer || !buffer[0]) {
- pam_syslog(pamh, LOG_ERR,
- "%s: no tty entry #%d", PAM_TIME_CONF, count);
- continue;
- }
- good &= logic_field(pamh, tty, buffer, count, is_same);
- D(("with tty: %s", good ? "passes":"fails" ));
-
- /* here we get the username field */
-
- fd = read_field(pamh, fd, &buffer, &from, &to);
- if (!buffer || !buffer[0]) {
- pam_syslog(pamh, LOG_ERR,
- "%s: no user entry #%d", PAM_TIME_CONF, count);
- continue;
- }
- /* If buffer starts with @, we are using netgroups */
- if (buffer[0] == '@')
- good &= innetgr (&buffer[1], NULL, user, NULL);
- else
- good &= logic_field(pamh, user, buffer, count, is_same);
- D(("with user: %s", good ? "passes":"fails" ));
-
- /* here we get the time field */
-
- fd = read_field(pamh, fd, &buffer, &from, &to);
- if (!buffer || !buffer[0]) {
- pam_syslog(pamh, LOG_ERR,
- "%s: no time entry #%d", PAM_TIME_CONF, count);
- continue;
- }
-
- intime = logic_field(pamh, &here_and_now, buffer, count, check_time);
- D(("with time: %s", intime ? "passes":"fails" ));
-
- fd = read_field(pamh, fd, &buffer, &from, &to);
- if (buffer && buffer[0]) {
- pam_syslog(pamh, LOG_ERR,
- "%s: poorly terminated rule #%d", PAM_TIME_CONF, count);
- continue;
- }
-
- if (good && !intime) {
- /*
- * for security parse whole file.. also need to ensure
- * that the buffer is free()'d and the file is closed.
- */
- retval = PAM_PERM_DENIED;
- } else {
- D(("rule passed"));
- }
- } while (buffer);
-
- return retval;
-}
-
-/* --- public account management functions --- */
-
-PAM_EXTERN int
-pam_sm_acct_mgmt(pam_handle_t *pamh, int flags UNUSED,
- int argc, const char **argv)
-{
- const void *service=NULL, *void_tty=NULL;
- const char *tty;
- const char *user=NULL;
- int ctrl;
- int rv;
-
- ctrl = _pam_parse(pamh, argc, argv);
-
- /* set service name */
-
- if (pam_get_item(pamh, PAM_SERVICE, &service)
- != PAM_SUCCESS || service == NULL) {
- pam_syslog(pamh, LOG_ERR, "cannot find the current service name");
- return PAM_ABORT;
- }
-
- /* set username */
-
- if (pam_get_user(pamh, &user, NULL) != PAM_SUCCESS || user == NULL
- || *user == '\0') {
- pam_syslog(pamh, LOG_ERR, "can not get the username");
- return PAM_USER_UNKNOWN;
- }
-
- /* set tty name */
-
- if (pam_get_item(pamh, PAM_TTY, &void_tty) != PAM_SUCCESS
- || void_tty == NULL) {
- D(("PAM_TTY not set, probing stdin"));
- tty = ttyname(STDIN_FILENO);
- if (tty == NULL) {
- tty = "";
- }
- if (pam_set_item(pamh, PAM_TTY, tty) != PAM_SUCCESS) {
- pam_syslog(pamh, LOG_ERR, "couldn't set tty name");
- return PAM_ABORT;
- }
- }
- else
- tty = void_tty;
-
- if (tty[0] == '/') { /* full path */
- const char *t;
- tty++;
- if ((t = strchr(tty, '/')) != NULL) {
- tty = t + 1;
- }
- }
-
- /* good, now we have the service name, the user and the terminal name */
-
- D(("service=%s", service));
- D(("user=%s", user));
- D(("tty=%s", tty));
-
- rv = check_account(pamh, service, tty, user);
- if (rv != PAM_SUCCESS) {
-#ifdef HAVE_LIBAUDIT
- if (!(ctrl & PAM_NO_AUDIT)) {
- pam_modutil_audit_write(pamh, AUDIT_ANOM_LOGIN_TIME,
- "pam_time", rv); /* ignore return value as we fail anyway */
- }
-#endif
- if (ctrl & PAM_DEBUG_ARG) {
- pam_syslog(pamh, LOG_DEBUG, "user %s rejected", user);
- }
- }
- return rv;
-}
-
-/* end of module definition */
-
-#ifdef PAM_STATIC
-
-/* static module data */
-
-struct pam_module _pam_time_modstruct = {
- "pam_time",
- NULL,
- NULL,
- pam_sm_acct_mgmt,
- NULL,
- NULL,
- NULL
-};
-#endif
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