Whine if single-DES keys are in use

If we are using single-DES keys in our KeyFile, yell at the
administrator, so they have a chance at realizing that they should
migrate to stronger crypto.

Reviewed-on: http://gerrit.openafs.org/10273
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 4212c7e604bebcb8f20b67c60323263231611bfb)

Change-Id: I00b47889e7e79819a3c5d347349686e5d2da30e8
Reviewed-on: http://gerrit.openafs.org/10274
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Tested-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>

src/ptserver/ptserver.c

@@ -550,6 +550,9 @@ main(int argc, char **argv)
 		   "1.0",
 #endif
 		   "Starting AFS", FSLog);
+    if (afsconf_GetLatestKey(prdir, NULL, NULL) == 0) {
+	LogDesWarning();
+    }
 
     rx_StartServer(1);
     osi_audit(PTS_FinishEvent, -1, AUD_END);

src/util/afsutil_prototypes.h

@@ -178,6 +178,7 @@ extern int LogThreadNum(void);
 extern void LogCommandLine(int argc, char **argv, const char *progname,
 			   const char *version, const char *logstring,
 			   void (*log) (const char *format, ...));
+extern void LogDesWarning(void);
 
 /* snprintf.c */
 

src/util/serverLog.c

@@ -197,6 +197,19 @@ LogCommandLine(int argc, char **argv, const char *progname,
     }
 }
 
+void
+LogDesWarning(void)
+{
+    /* The blank newlines help this stand out a bit more in the log. */
+    ViceLog(0, ("\n"));
+    ViceLog(0, ("WARNING: You are using single-DES keys in a KeyFile. Using single-DES\n"));
+    ViceLog(0, ("WARNING: long-term keys is considered insecure, and it is strongly\n"));
+    ViceLog(0, ("WARNING: recommended that you migrate to stronger encryption. See\n"));
+    ViceLog(0, ("WARNING: OPENAFS-SA-2013-003 on http://www.openafs.org/security/\n"));
+    ViceLog(0, ("WARNING: for details.\n"));
+    ViceLog(0, ("\n"));
+}
+
 static void*
 DebugOn(void *param)
 {

src/viced/viced.c

@@ -2028,6 +2028,9 @@ main(int argc, char *argv[])
 	exit(-1);
     }
     LogCommandLine(argc, argv, "starting", "", "File server", FSLog);
+    if (afsconf_GetLatestKey(confDir, NULL, NULL) == 0) {
+	LogDesWarning();
+    }
 
 #if defined(AFS_PTHREAD_ENV) && !defined(AFS_NT40_ENV)
     /* initialize the pthread soft signal handler thread */

src/vlserver/vlserver.c

@@ -400,6 +400,9 @@ main(int argc, char **argv)
     rx_SetMaxProcs(tservice, 4);
 
     LogCommandLine(argc, argv, "vlserver", VldbVersion, "Starting AFS", FSLog);
+    if (afsconf_GetLatestKey(tdir, NULL, NULL) == 0) {
+	LogDesWarning();
+    }
     printf("%s\n", cml_version_number);	/* Goes to the log */
 
     /* allow super users to manage RX statistics */

src/volser/volmain.c

@@ -564,6 +564,9 @@ main(int argc, char **argv)
 
     LogCommandLine(argc, argv, "Volserver", VolserVersion, "Starting AFS",
 		   Log);
+    if (afsconf_GetLatestKey(tdir, NULL, NULL) == 0) {
+	LogDesWarning();
+    }
     if (TTsleep) {
 	Log("Will sleep %d second%s every %d second%s\n", TTsleep,
 	    (TTsleep > 1) ? "s" : "", TTrun + TTsleep,