gnutls_session_get_keylog_function: new functiontmp-get-keylog-func

This adds a way to retrieve the keylog function set by
gnutls_session_set_keylog_function() to allow application protocols to
implement custom logging facility.

Signed-off-by: Daiki Ueno <dueno@redhat.com>

3 files changed, 19 insertions, 0 deletions

diff --git a/lib/includes/gnutls/gnutls.h.in b/lib/includes/gnutls/gnutls.h.in
index b0832a9bdd..d46bb04491 100644
--- a/lib/includes/gnutls/gnutls.h.in
+++ b/lib/includes/gnutls/gnutls.h.in
@@ -2312,6 +2312,7 @@ void gnutls_global_set_log_level(int level);
 typedef int (*gnutls_keylog_func) (gnutls_session_t session,
 				   const char *label,
 				   const gnutls_datum_t *secret);
+gnutls_keylog_func gnutls_session_get_keylog_function(const gnutls_session_t session);
 void gnutls_session_set_keylog_function(gnutls_session_t session,
 					gnutls_keylog_func func);
 
diff --git a/lib/kx.c b/lib/kx.c
index d5abf69ea7..a874f15114 100644
--- a/lib/kx.c
+++ b/lib/kx.c
@@ -71,6 +71,23 @@ int _gnutls_generate_master(gnutls_session_t session, int keep_premaster)
 }
 
 /**
+ * gnutls_session_get_keylog_function:
+ * @session: is #gnutls_session_t type
+ *
+ * This function will return the callback function set using
+ * gnutls_session_set_keylog_function().
+ *
+ * Returns: The function set or %NULL otherwise.
+ *
+ * Since: 3.6.13
+ */
+gnutls_keylog_func
+gnutls_session_get_keylog_function(const gnutls_session_t session)
+{
+	return session->internals.keylog_func;
+}
+
+/**
  * gnutls_session_set_keylog_function:
  * @session: is #gnutls_session_t type
  * @func: is the function to be called
diff --git a/lib/libgnutls.map b/lib/libgnutls.map
index 3cc321beb8..97fc97f152 100644
--- a/lib/libgnutls.map
+++ b/lib/libgnutls.map
@@ -1315,6 +1315,7 @@ GNUTLS_3_6_13
 	gnutls_hkdf_extract;
 	gnutls_hkdf_expand;
 	gnutls_pbkdf2;
+	gnutls_session_get_keylog_function;
 	gnutls_session_set_keylog_function;
 	gnutls_prf_hash_get;
 } GNUTLS_3_6_12;