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-rw-r--r--nis/nss_nisplus/nisplus-parser.c78
-rw-r--r--nis/nss_nisplus/nisplus-pwd.c6
2 files changed, 55 insertions, 29 deletions
diff --git a/nis/nss_nisplus/nisplus-parser.c b/nis/nss_nisplus/nisplus-parser.c
index fa4073e6d8..35b8a2881e 100644
--- a/nis/nss_nisplus/nisplus-parser.c
+++ b/nis/nss_nisplus/nisplus-parser.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1999 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
 
@@ -38,6 +38,7 @@ _nss_nisplus_parse_pwent (nis_result *result, struct passwd *pw,
 {
   char *first_unused = buffer;
   size_t room_left = buflen;
+  size_t len;
 
   if (result == NULL)
     return 0;
@@ -61,9 +62,12 @@ _nss_nisplus_parse_pwent (nis_result *result, struct passwd *pw,
   strncpy (first_unused, NISENTRYVAL (0, 0, result),
 	   NISENTRYLEN (0, 0, result));
   first_unused[NISENTRYLEN (0, 0, result)] = '\0';
+  len = strlen (first_unused);
+  if (len == 0) /* No name ? Should never happen, database is corrupt */
+    return 0;
   pw->pw_name = first_unused;
-  room_left -= (strlen (first_unused) +1);
-  first_unused += strlen (first_unused) +1;
+  room_left -= (len + 1);
+  first_unused += (len + 1);
 
   if (NISENTRYLEN (0, 1, result) >= room_left)
     goto no_more_room;
@@ -72,8 +76,9 @@ _nss_nisplus_parse_pwent (nis_result *result, struct passwd *pw,
 	   NISENTRYLEN (0, 1, result));
   first_unused[NISENTRYLEN (0, 1, result)] = '\0';
   pw->pw_passwd = first_unused;
-  room_left -= (strlen (first_unused) +1);
-  first_unused += strlen (first_unused) +1;
+  len = strlen (first_unused);
+  room_left -= (len + 1);
+  first_unused += (len + 1);
 
   if (NISENTRYLEN(0, 2, result) >= room_left)
     goto no_more_room;
@@ -81,9 +86,12 @@ _nss_nisplus_parse_pwent (nis_result *result, struct passwd *pw,
   strncpy (first_unused, NISENTRYVAL (0, 2, result),
 	   NISENTRYLEN (0, 2, result));
   first_unused[NISENTRYLEN (0, 2, result)] = '\0';
+  len = strlen (first_unused);
+  if (len == 0) /* If we don't have a uid, it's an invalid shadow entry */
+    return 0;
   pw->pw_uid = atoi (first_unused);
-  room_left -= (strlen (first_unused) +1);
-  first_unused += strlen (first_unused) +1;
+  room_left -= (len + 1);
+  first_unused += (len + 1);
 
   if (NISENTRYLEN (0, 3, result) >= room_left)
     goto no_more_room;
@@ -91,9 +99,12 @@ _nss_nisplus_parse_pwent (nis_result *result, struct passwd *pw,
   strncpy (first_unused, NISENTRYVAL (0, 3, result),
 	   NISENTRYLEN (0, 3, result));
   first_unused[NISENTRYLEN (0, 3, result)] = '\0';
+  len = strlen (first_unused);
+  if (len == 0) /* If we don't have a gid, it's an invalid shadow entry */
+    return 0;
   pw->pw_gid = atoi (first_unused);
-  room_left -= (strlen (first_unused) +1);
-  first_unused += strlen (first_unused) +1;
+  room_left -= (len + 1);
+  first_unused += (len + 1);
 
   if (NISENTRYLEN(0, 4, result) >= room_left)
     goto no_more_room;
@@ -102,8 +113,9 @@ _nss_nisplus_parse_pwent (nis_result *result, struct passwd *pw,
 	   NISENTRYLEN (0, 4, result));
   first_unused[NISENTRYLEN (0, 4, result)] = '\0';
   pw->pw_gecos = first_unused;
-  room_left -= (strlen (first_unused) +1);
-  first_unused += strlen (first_unused) +1;
+  len = strlen (first_unused);
+  room_left -= (len + 1);
+  first_unused += (len + 1);
 
   if (NISENTRYLEN (0, 5, result) >= room_left)
     goto no_more_room;
@@ -112,8 +124,9 @@ _nss_nisplus_parse_pwent (nis_result *result, struct passwd *pw,
 	   NISENTRYLEN (0, 5, result));
   first_unused[NISENTRYLEN (0, 5, result)] = '\0';
   pw->pw_dir = first_unused;
-  room_left -= (strlen (first_unused) +1);
-  first_unused += strlen (first_unused) +1;
+  len = strlen (first_unused);
+  room_left -= (len + 1);
+  first_unused += (len + 1);
 
   if (NISENTRYLEN (0, 6, result) >= room_left)
     goto no_more_room;
@@ -122,8 +135,9 @@ _nss_nisplus_parse_pwent (nis_result *result, struct passwd *pw,
 	   NISENTRYLEN (0, 6, result));
   first_unused[NISENTRYLEN (0, 6, result)] = '\0';
   pw->pw_shell = first_unused;
-  room_left -= (strlen (first_unused) +1);
-  first_unused += strlen (first_unused) +1;
+  len = strlen (first_unused);
+  room_left -= (len + 1);
+  first_unused += (len + 1);
 
   return 1;
 }
@@ -136,6 +150,7 @@ _nss_nisplus_parse_grent (nis_result *result, u_long entry, struct group *gr,
   size_t room_left = buflen;
   char *line;
   int count;
+  size_t len;
 
   if (result == NULL)
     return 0;
@@ -158,9 +173,12 @@ _nss_nisplus_parse_grent (nis_result *result, u_long entry, struct group *gr,
   strncpy (first_unused, NISENTRYVAL (entry, 0, result),
 	   NISENTRYLEN (entry, 0, result));
   first_unused[NISENTRYLEN (entry, 0, result)] = '\0';
+  len = strlen (first_unused);
+  if (len == 0) /* group table is corrupt */
+    return 0;
   gr->gr_name = first_unused;
-  room_left -= (strlen (first_unused) + 1);
-  first_unused += strlen (first_unused) + 1;
+  room_left -= (len + 1);
+  first_unused += (len + 1);
 
   if (NISENTRYLEN (entry, 1, result) >= room_left)
     goto no_more_room;
@@ -169,8 +187,9 @@ _nss_nisplus_parse_grent (nis_result *result, u_long entry, struct group *gr,
 	   NISENTRYLEN (entry, 1, result));
   first_unused[NISENTRYLEN (entry, 1, result)] = '\0';
   gr->gr_passwd = first_unused;
-  room_left -= (strlen (first_unused) + 1);
-  first_unused += strlen (first_unused) + 1;
+  len = strlen (first_unused);
+  room_left -= (len + 1);
+  first_unused += (len + 1);
 
   if (NISENTRYLEN (entry, 2, result) >= room_left)
     goto no_more_room;
@@ -178,6 +197,9 @@ _nss_nisplus_parse_grent (nis_result *result, u_long entry, struct group *gr,
   strncpy (first_unused, NISENTRYVAL (entry, 2, result),
 	   NISENTRYLEN (entry, 2, result));
   first_unused[NISENTRYLEN (entry, 2, result)] = '\0';
+  len = strlen (first_unused);
+  if (len == 0) /* We should always have an gid */
+    return 0;
   gr->gr_gid = atoi (first_unused);
   room_left -= (strlen (first_unused) + 1);
   first_unused += strlen (first_unused) + 1;
@@ -189,8 +211,9 @@ _nss_nisplus_parse_grent (nis_result *result, u_long entry, struct group *gr,
 	   NISENTRYLEN (entry, 3, result));
   first_unused[NISENTRYLEN (entry, 3, result)] = '\0';
   line = first_unused;
-  room_left -= (strlen (line) + 1);
-  first_unused += strlen (line) + 1;
+  len = strlen (line);
+  room_left -= (len + 1);
+  first_unused += (len + 1);
   /* Adjust the pointer so it is aligned for
      storing pointers.  */
   first_unused += __alignof__ (char *) - 1;
@@ -244,6 +267,7 @@ _nss_nisplus_parse_spent (nis_result *result, struct spwd *sp,
 {
   char *first_unused = buffer;
   size_t room_left = buflen;
+  size_t len;
 
   if (result == NULL)
     return 0;
@@ -267,9 +291,12 @@ _nss_nisplus_parse_spent (nis_result *result, struct spwd *sp,
   strncpy (first_unused, NISENTRYVAL (0, 0, result),
 	   NISENTRYLEN (0, 0, result));
   first_unused[NISENTRYLEN (0, 0, result)] = '\0';
+  len = strlen (first_unused);
+  if (len == 0)
+    return 0;
   sp->sp_namp = first_unused;
-  room_left -= (strlen (first_unused) +1);
-  first_unused += strlen (first_unused) +1;
+  room_left -= (len + 1);
+  first_unused += (len + 1);
 
   if (NISENTRYLEN (0, 1, result) >= room_left)
     goto no_more_room;
@@ -278,8 +305,9 @@ _nss_nisplus_parse_spent (nis_result *result, struct spwd *sp,
 	   NISENTRYLEN (0, 1, result));
   first_unused[NISENTRYLEN (0, 1, result)] = '\0';
   sp->sp_pwdp = first_unused;
-  room_left -= (strlen (first_unused) +1);
-  first_unused += strlen (first_unused) +1;
+  len = strlen (first_unused);
+  room_left -= (len + 1);
+  first_unused += (len + 1);
 
   sp->sp_lstchg = sp->sp_min = sp->sp_max = sp->sp_warn = sp->sp_inact =
     sp->sp_expire = sp->sp_flag = -1;
diff --git a/nis/nss_nisplus/nisplus-pwd.c b/nis/nss_nisplus/nisplus-pwd.c
index 45c364ac39..194b97ff65 100644
--- a/nis/nss_nisplus/nisplus-pwd.c
+++ b/nis/nss_nisplus/nisplus-pwd.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1999 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
 
@@ -25,6 +25,7 @@
 #include <rpcsvc/nis.h>
 
 #include "nss-nisplus.h"
+#include "nisplus-parser.h"
 
 __libc_lock_define_initialized (static, lock)
 
@@ -32,9 +33,6 @@ static nis_result *result = NULL;
 static nis_name tablename_val = NULL;
 static u_long tablename_len = 0;
 
-extern int _nss_nisplus_parse_pwent (nis_result *res, struct passwd *pw,
-				     char *buffer, size_t buflen, int *errnop);
-
 static enum nss_status
 _nss_create_tablename (int *errnop)
 {
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-12-02 17:12:56 +0000