+/* util_sm.c */
+enum gss_eap_state {
+ GSSEAP_STATE_INITIAL = 0x01, /* initial state */
+ GSSEAP_STATE_AUTHENTICATE = 0x02, /* exchange EAP messages */
+ GSSEAP_STATE_INITIATOR_EXTS = 0x04, /* initiator extensions */
+ GSSEAP_STATE_ACCEPTOR_EXTS = 0x08, /* acceptor extensions */
+#ifdef GSSEAP_ENABLE_REAUTH
+ GSSEAP_STATE_REAUTHENTICATE = 0x10, /* GSS reauthentication messages */
+#endif
+ GSSEAP_STATE_ESTABLISHED = 0x20, /* context established */
+ GSSEAP_STATE_ALL = 0x3F
+};
+
+#define GSSEAP_STATE_NEXT(s) ((s) << 1)
+
+#define GSSEAP_SM_STATE(ctx) ((ctx)->state)
+
+#ifdef GSSEAP_DEBUG
+void gssEapSmTransition(gss_ctx_id_t ctx, enum gss_eap_state state);
+#define GSSEAP_SM_TRANSITION(ctx, state) gssEapSmTransition((ctx), (state))
+#else
+#define GSSEAP_SM_TRANSITION(ctx, newstate) do { (ctx)->state = (newstate); } while (0)
+#endif
+
+#define GSSEAP_SM_TRANSITION_NEXT(ctx) GSSEAP_SM_TRANSITION((ctx), GSSEAP_STATE_NEXT(GSSEAP_SM_STATE((ctx))))
+
+/* state machine entry */
+struct gss_eap_sm {
+ OM_uint32 inputTokenType;
+ OM_uint32 outputTokenType;
+ enum gss_eap_state validStates;
+ OM_uint32 itokFlags;
+ OM_uint32 (*processToken)(OM_uint32 *,
+ gss_cred_id_t,
+ gss_ctx_id_t,
+ gss_name_t,
+ gss_OID,
+ OM_uint32,
+ OM_uint32,
+ gss_channel_bindings_t,
+ gss_buffer_t,
+ gss_buffer_t,
+ OM_uint32 *);
+};
+
+/* state machine flags, set by handler */
+#define SM_FLAG_FORCE_SEND_TOKEN 0x00000001 /* send token even if no inner tokens */
+#define SM_FLAG_OUTPUT_TOKEN_CRITICAL 0x00000002 /* output token is critical */
+
+/* state machine flags, set by state machine */
+#define SM_FLAG_INPUT_TOKEN_CRITICAL 0x10000000 /* input token was critical */
+
+#define SM_ITOK_FLAG_REQUIRED 0x00000001 /* received tokens must be present */
+
+OM_uint32
+gssEapSmStep(OM_uint32 *minor,
+ gss_cred_id_t cred,
+ gss_ctx_id_t ctx,
+ gss_name_t target,
+ gss_OID mech,
+ OM_uint32 reqFlags,
+ OM_uint32 timeReq,
+ gss_channel_bindings_t chanBindings,
+ gss_buffer_t inputToken,
+ gss_buffer_t outputToken,
+ struct gss_eap_sm *sm,
+ size_t smCount);
+
+void
+gssEapSmTransition(gss_ctx_id_t ctx, enum gss_eap_state state);
+