krb5/Process-profile-includedir-in-sorted-order.patch

From 5d868264bca1771aa16abbc8cc0aefb0e1750a73 Mon Sep 17 00:00:00 2001
From: Greg Hudson <ghudson@mit.edu>
Date: Wed, 6 Jun 2018 17:58:41 -0400
Subject: [PATCH] Process profile includedir in sorted order

In the profile library, use k5_dir_filenames() so that files within an
included directory are read in a predictable order (alphanumeric
within the C locale).

ticket: 8686
(cherry picked from commit f574eda48740ad192f51e9a382a205e2ea0e60ad)
---
 doc/admin/conf_files/krb5_conf.rst |  4 ++-
 src/util/profile/prof_parse.c      | 56 +++++-------------------------
 2 files changed, 12 insertions(+), 48 deletions(-)

diff --git a/doc/admin/conf_files/krb5_conf.rst b/doc/admin/conf_files/krb5_conf.rst
index 2574e5c26..ce545492d 100644
--- a/doc/admin/conf_files/krb5_conf.rst
+++ b/doc/admin/conf_files/krb5_conf.rst
@@ -60,7 +60,9 @@ alphanumeric characters, dashes, or underscores.  Starting in release
 1.15, files with names ending in ".conf" are also included, unless the
 name begins with ".".  Included profile files are syntactically
 independent of their parents, so each included file must begin with a
-section header.
+section header.  Starting in release 1.17, files are read in
+alphanumeric order; in previous releases, they may be read in any
+order.
 
 The krb5.conf file can specify that configuration should be obtained
 from a loadable module, rather than the file itself, using the
diff --git a/src/util/profile/prof_parse.c b/src/util/profile/prof_parse.c
index 1baceea9e..531e4a099 100644
--- a/src/util/profile/prof_parse.c
+++ b/src/util/profile/prof_parse.c
@@ -246,59 +246,22 @@ static int valid_name(const char *filename)
  * Include files within dirname.  Only files with names ending in ".conf", or
  * consisting entirely of alphanumeric characters, dashes, and underscores are
  * included.  This restriction avoids including editor backup files, .rpmsave
- * files, and the like.
+ * files, and the like.  Files are processed in alphanumeric order.
  */
 static errcode_t parse_include_dir(const char *dirname,
                                    struct profile_node *root_section)
 {
-#ifdef _WIN32
-    char *wildcard = NULL, *pathname;
-    WIN32_FIND_DATA ffd;
-    HANDLE handle;
     errcode_t retval = 0;
+    char **fnames, *pathname;
+    int i;
 
-    if (asprintf(&wildcard, "%s\\*", dirname) < 0)
-        return ENOMEM;
-
-    handle = FindFirstFile(wildcard, &ffd);
-    if (handle == INVALID_HANDLE_VALUE) {
-        retval = PROF_FAIL_INCLUDE_DIR;
-        goto cleanup;
-    }
-
-    do {
-        if (!valid_name(ffd.cFileName))
-            continue;
-        if (asprintf(&pathname, "%s\\%s", dirname, ffd.cFileName) < 0) {
-            retval = ENOMEM;
-            break;
-        }
-        retval = parse_include_file(pathname, root_section);
-        free(pathname);
-        if (retval)
-            break;
-    } while (FindNextFile(handle, &ffd) != 0);
-
-    FindClose(handle);
-
-cleanup:
-    free(wildcard);
-    return retval;
-
-#else /* not _WIN32 */
-
-    DIR     *dir;
-    char    *pathname;
-    errcode_t retval = 0;
-    struct dirent *ent;
-
-    dir = opendir(dirname);
-    if (dir == NULL)
+    if (k5_dir_filenames(dirname, &fnames) != 0)
         return PROF_FAIL_INCLUDE_DIR;
-    while ((ent = readdir(dir)) != NULL) {
-        if (!valid_name(ent->d_name))
+
+    for (i = 0; fnames != NULL && fnames[i] != NULL; i++) {
+        if (!valid_name(fnames[i]))
             continue;
-        if (asprintf(&pathname, "%s/%s", dirname, ent->d_name) < 0) {
+        if (asprintf(&pathname, "%s/%s", dirname, fnames[i]) < 0) {
             retval = ENOMEM;
             break;
         }
@@ -307,9 +270,8 @@ cleanup:
         if (retval)
             break;
     }
-    closedir(dir);
+    k5_free_filenames(fnames);
     return retval;
-#endif /* not _WIN32 */
 }
 
 static errcode_t parse_line(char *line, struct parse_state *state,