Add GssapiSignalPersistentAuth directive

Controls whether to send the Persistent-Auth header, and sets it only
when necessary/appropriate

Reviewed-by: Simo Sorce <simo@redhat.com>

3 files changed, 22 insertions, 3 deletions

diff --git a/README b/README
index e23f745..e8d3031 100644
--- a/README
+++ b/README
@@ -89,12 +89,17 @@ authentication (like NTLMSSP) it is necessary to bind to the authentication to
 the connection in order to keep the state between round-trips. With this option
 enable incomplete context are store in the connection and retrieved on the next
 request for continuation.
-When using this option you may also ant to set the Persistent-Auth header for
-those clients that make use of it.
 
 Example:
     GssapiConnectionBound On
-    Header set Persistent-Auth "true"
+
+
+### GssapiSignalPersistentAuth
+For clients that make use of Persistent-Auth header, send the header according
+to GssapiConnectionBound setting.
+
+Example:
+    GssapiSignalPersistentAuth On
 
 
 ### GssapiUseSessions
diff --git a/src/mod_auth_gssapi.c b/src/mod_auth_gssapi.c
index 48300e9..0ca9a27 100644
--- a/src/mod_auth_gssapi.c
+++ b/src/mod_auth_gssapi.c
@@ -572,6 +572,10 @@ static int mag_auth(request_rec *req)
         mc->auth_type = auth_type;
     }
 
+    if (cfg->send_persist)
+        apr_table_set(req->headers_out, "Persistent-Auth",
+            cfg->gss_conn_ctx ? "true" : "false");
+
     ret = OK;
 
 done:
@@ -650,6 +654,13 @@ static const char *mag_conn_ctx(cmd_parms *parms, void *mconfig, int on)
     return NULL;
 }
 
+static const char *mag_send_persist(cmd_parms *parms, void *mconfig, int on)
+{
+    struct mag_config *cfg = (struct mag_config *)mconfig;
+    cfg->send_persist = on ? true : false;
+    return NULL;
+}
+
 static const char *mag_use_sess(cmd_parms *parms, void *mconfig, int on)
 {
     struct mag_config *cfg = (struct mag_config *)mconfig;
@@ -803,6 +814,8 @@ static const command_rec mag_commands[] = {
                   "Translate principals to local names"),
     AP_INIT_FLAG("GssapiConnectionBound", mag_conn_ctx, NULL, OR_AUTHCFG,
                   "Authentication is bound to the TCP connection"),
+    AP_INIT_FLAG("GssapiSignalPersistentAuth", mag_send_persist, NULL, OR_AUTHCFG,
+                  "Send Persitent-Auth header according to connection bound"),
     AP_INIT_FLAG("GssapiUseSessions", mag_use_sess, NULL, OR_AUTHCFG,
                   "Authentication uses mod_sessions to hold status"),
     AP_INIT_RAW_ARGS("GssapiSessionKey", mag_sess_key, NULL, OR_AUTHCFG,
diff --git a/src/mod_auth_gssapi.h b/src/mod_auth_gssapi.h
index 4cf7d39..b12b0e9 100644
--- a/src/mod_auth_gssapi.h
+++ b/src/mod_auth_gssapi.h
@@ -39,6 +39,7 @@ struct mag_config {
     bool ssl_only;
     bool map_to_local;
     bool gss_conn_ctx;
+    bool send_persist;
     bool use_sessions;
     bool use_s4u2proxy;
     char *deleg_ccache_dir;