avoid memory leaks; remove union in oauth2_jose_jwks_provider_t

Signed-off-by: Hans Zandbelt <hans.zandbelt@openidc.com>

Author: zandbelt

src/jose_int.h

@@ -60,15 +60,19 @@ typedef oauth2_jose_jwk_list_t *(
 typedef struct oauth2_jose_jwks_provider_t {
 	oauth2_jose_jwks_provider_type_t type;
 	oauth2_jose_jwks_resolve_cb_t *resolve;
-	union {
-		oauth2_uri_ctx_t *jwks_uri;
-		oauth2_jose_jwk_list_t *jwks;
-		struct {
-			char *alb_arn;
-			char *alb_base_url;
-		};
-	};
-	// struct oauth2_jose_jwks_provider_t *next;
+
+	// NB: avoid union because of compiler/memory issues
+
+	// OAUTH2_JOSE_JWKS_PROVIDER_JWKS_URI and
+	// OAUTH2_JOSE_JWKS_PROVIDER_ECKEY_URI
+	oauth2_uri_ctx_t *jwks_uri;
+
+	// OAUTH2_JOSE_JWKS_PROVIDER_LIST
+	oauth2_jose_jwk_list_t *jwks;
+
+	// OAUTH2_JOSE_JWKS_PROVIDER_AWS_ALB
+	char *alb_arn;
+	char *alb_base_url;
 } oauth2_jose_jwks_provider_t;
 
 _OAUTH2_CFG_CTX_TYPE_START(oauth2_jose_jwt_verify_ctx)

test/check_oauth2.c

@@ -827,6 +827,7 @@ START_TEST(test_oauth2_verify_aws_alb)
 	ck_assert_int_eq(rc, true);
 
 	oauth2_cfg_token_verify_free(_log, verify);
+	oauth2_mem_free(options);
 	oauth2_mem_free(url);
 	json_decref(json_payload);
 }