From 07b32184ee337ec06a405724b4b88cad22829c6d Mon Sep 17 00:00:00 2001
From: Robbie Harwood <rharwood@redhat.com>
Date: Mon, 30 Sep 2019 15:00:56 -0400
Subject: [PATCH] Make syslog of call status configurable

Add a parameter (syslog_status) to configuration and
CLI (--syslog-status).  This logs the results of GSSAPI calls at
LOG_DEBUG.  Typically these calls resemble:

    gssproxy[28914]: (OID: { 1 2 840 113554 1 2 2 }) Unspecified GSS
    failure.  Minor code may provide more information, No credentials
    cache found

Since these messages worry some admins, turn them off by default.

Signed-off-by: Robbie Harwood <rharwood@redhat.com>
(cherry picked from commit 116618e1523038691fcb481107ba15ffd42942ac)
(cherry picked from commit cc61409b7b20974332549dd028d889b87dbff98d)
---
 man/gssproxy.8.xml      |  8 ++++++++
 man/gssproxy.conf.5.xml | 10 ++++++++++
 src/gp_config.c         |  6 ++++++
 src/gp_log.c            |  9 +++++++--
 src/gp_log.h            |  3 +++
 src/gssproxy.c          |  6 ++++++
 6 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/man/gssproxy.8.xml b/man/gssproxy.8.xml
index 21f7e6a..4019135 100644
--- a/man/gssproxy.8.xml
+++ b/man/gssproxy.8.xml
@@ -151,6 +151,14 @@
                 </listitem>
             </varlistentry>
 
+            <varlistentry>
+                <term>
+                    <option>--syslog-status</option>
+                </term>
+                <listitem>
+                    <para>Enable additional logging to syslog.</para>
+                </listitem>
+            </varlistentry>
             <varlistentry>
                 <term>
                     <option>--version</option>
diff --git a/man/gssproxy.conf.5.xml b/man/gssproxy.conf.5.xml
index 21c9653..53cae3d 100644
--- a/man/gssproxy.conf.5.xml
+++ b/man/gssproxy.conf.5.xml
@@ -365,6 +365,16 @@
                     </listitem>
                 </varlistentry>
 
+                <varlistentry>
+                    <term>syslog_status (boolean)</term>
+                    <listitem>
+                        <para>Enable per-call debugging output to the syslog.
+                        This may be useful for investigating problems in
+                        applications using gssproxy.</para>
+                        <para>Default: syslog_status = false</para>
+                    </listitem>
+                </varlistentry>
+
                 <varlistentry>
                     <term>trusted (boolean)</term>
                         <listitem><para>Defines whether this service is considered trusted. Use with caution, this enables impersonation.</para>
diff --git a/src/gp_config.c b/src/gp_config.c
index 78474ed..88d5f29 100644
--- a/src/gp_config.c
+++ b/src/gp_config.c
@@ -611,6 +611,12 @@ int load_config(struct gp_config *cfg)
         goto done;
     }
 
+    ret = gp_config_get_string(ctx, "gssproxy", "syslog_status", &tmpstr);
+    if (ret == 0)
+        gp_syslog_status = gp_boolean_is_true(tmpstr);
+    else if (ret != ENOENT)
+        goto done;
+
     ret = gp_config_get_string(ctx, "gssproxy", "run_as_user", &tmpstr);
     if (ret == 0) {
         cfg->proxy_user = strdup(tmpstr);
diff --git a/src/gp_log.c b/src/gp_log.c
index b6eb161..e67e8d3 100644
--- a/src/gp_log.c
+++ b/src/gp_log.c
@@ -5,6 +5,9 @@
 #include <stdio.h>
 #include <stdarg.h>
 
+/* global logging switch */
+bool gp_syslog_status = false;
+
 void gp_logging_init(void)
 {
     openlog("gssproxy",
@@ -55,7 +58,9 @@ void gp_log_status(gss_OID mech, uint32_t maj, uint32_t min)
 {
     char buf[MAX_LOG_LINE];
 
-    gp_fmt_status(mech, maj, min, buf, MAX_LOG_LINE);
+    if (!gp_syslog_status)
+        return;
 
-    GPERROR("%s\n", buf);
+    gp_fmt_status(mech, maj, min, buf, MAX_LOG_LINE);
+    syslog(LOG_DEBUG, "%s\n", buf);
 }
diff --git a/src/gp_log.h b/src/gp_log.h
index fc8cbdb..31ad648 100644
--- a/src/gp_log.h
+++ b/src/gp_log.h
@@ -3,9 +3,12 @@
 #ifndef _GP_LOG_H_
 #define _GP_LOG_H_
 
+#include <stdbool.h>
 #include <syslog.h>
 #include <gssapi/gssapi.h>
 
+extern bool gp_syslog_status;
+
 #define MAX_LOG_LINE 1024
 #define GPERROR(...) syslog(LOG_ERR, __VA_ARGS__);
 #define GPAUDIT(...) syslog(LOG_INFO, __VA_ARGS__);
diff --git a/src/gssproxy.c b/src/gssproxy.c
index db6e89b..6b72a9b 100644
--- a/src/gssproxy.c
+++ b/src/gssproxy.c
@@ -157,6 +157,7 @@ int main(int argc, const char *argv[])
     int opt_version = 0;
     int opt_debug = 0;
     int opt_debug_level = 0;
+    int opt_syslog_status = 0;
     verto_ctx *vctx;
     verto_ev *ev;
     int wait_fd;
@@ -182,6 +183,8 @@ int main(int argc, const char *argv[])
          _("Enable debugging"), NULL}, \
         {"debug-level", '\0', POPT_ARG_INT, &opt_debug_level, 0, \
          _("Set debugging level"), NULL}, \
+        {"syslog-status", '\0', POPT_ARG_NONE, &opt_syslog_status, 0, \
+         _("Enable GSSAPI status logging to syslog"), NULL}, \
         {"version", '\0', POPT_ARG_NONE, &opt_version, 0, \
          _("Print version number and exit"), NULL }, \
         POPT_TABLEEND
@@ -211,6 +214,9 @@ int main(int argc, const char *argv[])
         gp_debug_toggle(opt_debug_level);
     }
 
+    if (opt_syslog_status)
+        gp_syslog_status = true;
+
     if (opt_daemon && opt_interactive) {
         fprintf(stderr, "Option -i|--interactive is not allowed together with -D|--daemon\n");
         poptPrintUsage(pc, stderr, 0);