Add context id getter to TKM nonce generator

src/charon-tkm/src/tkm/tkm_nonceg.c

@@ -65,6 +65,12 @@ METHOD(nonce_gen_t, destroy, void,
 	free(this);
 }
 
+METHOD(tkm_nonceg_t, get_id, nc_id_type,
+	private_tkm_nonceg_t *this)
+{
+	return this->context_id;
+}
+
 /*
  * Described in header.
  */
@@ -79,6 +85,7 @@ tkm_nonceg_t *tkm_nonceg_create()
 				.allocate_nonce = _allocate_nonce,
 				.destroy = _destroy,
 			},
+			.get_id = _get_id,
 		},
 		.context_id = tkm->idmgr->acquire_id(tkm->idmgr, TKM_CTX_NONCE),
 	);

src/charon-tkm/src/tkm/tkm_nonceg.h

@@ -20,6 +20,7 @@
 typedef struct tkm_nonceg_t tkm_nonceg_t;
 
 #include <library.h>
+#include <tkm/types.h>
 
 /**
  * nonce_gen_t implementation using the trusted key manager.
@@ -30,6 +31,14 @@ struct tkm_nonceg_t {
 	 * Implements nonce_gen_t.
 	 */
 	nonce_gen_t nonce_gen;
+
+	/**
+	 * Get nonce context id.
+	 *
+	 * @return	context id of this nonce generator.
+	 */
+	nc_id_type (*get_id)(tkm_nonceg_t * const this);
+
 };
 
 /**

src/charon-tkm/tests/nonceg_tests.c

@@ -26,6 +26,7 @@ START_TEST(test_nonceg_creation)
 
 	ng = tkm_nonceg_create();
 	fail_if(ng == NULL, "Error creating tkm nonce generator");
+	fail_if(ng->get_id(ng) == 0, "Invalid context id (0)");
 
 	ng->nonce_gen.destroy(&ng->nonce_gen);
 }