merged OpenSSH 5.1p1 to trunk

[gssapi-openssh.git] / openssh / auth.c

diff --git a/openssh/auth.c b/openssh/auth.c
index f35600eed1fe302754c3d40e50f83164dd1b1d3a..f95c91f4394ffcd03a211abbfcdad3e09fcc8b6d 100644 (file)
--- a/openssh/auth.c
+++ b/openssh/auth.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: auth.c,v 1.78 2007/09/21 08:15:29 djm Exp $ */
+/* $OpenBSD: auth.c,v 1.79 2008/07/02 12:03:51 dtucker Exp $ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  *
@@ -32,6 +32,7 @@
 #include <netinet/in.h>
 
 #include <errno.h>
+#include <fcntl.h>
 #ifdef HAVE_PATHS_H
 # include <paths.h>
 #endif
@@ -48,6 +49,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "xmalloc.h"
 #include "match.h"
@@ -113,6 +115,7 @@ allowed_user(struct passwd * pw)
 #endif /* USE_SHADOW */
 
        /* grab passwd field for locked account check */
+       passwd = pw->pw_passwd;
 #ifdef USE_SHADOW
        if (spw != NULL)
 #ifdef USE_LIBIAF
@@ -120,8 +123,6 @@ allowed_user(struct passwd * pw)
 #else
                passwd = spw->sp_pwdp;
 #endif /* USE_LIBIAF */
-#else
-       passwd = pw->pw_passwd;
 #endif
 
        /* check for locked account */
@@ -411,7 +412,7 @@ check_key_in_hostfiles(struct passwd *pw, Key *key, const char *host,
  *
  * Returns 0 on success and -1 on failure
  */
-int
+static int
 secure_filename(FILE *f, const char *file, struct passwd *pw,
     char *err, size_t errlen)
 {
@@ -471,6 +472,46 @@ secure_filename(FILE *f, const char *file, struct passwd *pw,
        return 0;
 }
 
+FILE *
+auth_openkeyfile(const char *file, struct passwd *pw, int strict_modes)
+{
+       char line[1024];
+       struct stat st;
+       int fd;
+       FILE *f;
+
+       /*
+        * Open the file containing the authorized keys
+        * Fail quietly if file does not exist
+        */
+       if ((fd = open(file, O_RDONLY|O_NONBLOCK)) == -1)
+               return NULL;
+
+       if (fstat(fd, &st) < 0) {
+               close(fd);
+               return NULL;
+       }
+       if (!S_ISREG(st.st_mode)) {
+               logit("User %s authorized keys %s is not a regular file",
+                   pw->pw_name, file);
+               close(fd);
+               return NULL;
+       }
+       unset_nonblock(fd);
+       if ((f = fdopen(fd, "r")) == NULL) {
+               close(fd);
+               return NULL;
+       }
+       if (options.strict_modes &&
+           secure_filename(f, file, pw, line, sizeof(line)) != 0) {
+               fclose(f);
+               logit("Authentication refused: %s", line);
+               return NULL;
+       }
+
+       return f;
+}
+
 struct passwd *
 getpwnamallow(const char *user)
 {