Massive refactoring of the various handshake types

The three handshake types are now accessed from a unified interface;
their state is abstracted from the rest of the cpath state, and so on.

1 files changed, 33 insertions, 0 deletions

diff --git a/src/or/onion.h b/src/or/onion.h
index 55ea3f9306..3c12e1f85f 100644
--- a/src/or/onion.h
+++ b/src/or/onion.h
@@ -17,5 +17,38 @@ or_circuit_t *onion_next_task(char **onionskin_out);
 void onion_pending_remove(or_circuit_t *circ);
 void clear_pending_onions(void);
 
+typedef struct server_onion_keys_t {
+  uint8_t my_identity[DIGEST_LEN];
+  crypto_pk_t *onion_key;
+  crypto_pk_t *last_onion_key;
+#ifdef CURVE25519_ENABLED
+  di_digest256_map_t *curve25519_key_map;
+#endif
+} server_onion_keys_t;
+
+#define MAX_ONIONSKIN_CHALLENGE_LEN 255
+#define MAX_ONIONSKIN_REPLY_LEN 255
+
+void setup_server_onion_keys(server_onion_keys_t *keys);
+void release_server_onion_keys(server_onion_keys_t *keys);
+
+void onion_handshake_state_release(onion_handshake_state_t *state);
+
+int onion_skin_create(int type,
+                      const extend_info_t *node,
+                      onion_handshake_state_t *state_out,
+                      uint8_t *onion_skin_out);
+int onion_skin_server_handshake(int type,
+                      const uint8_t *onion_skin,
+                      const server_onion_keys_t *keys,
+                      uint8_t *reply_out,
+                      uint8_t *keys_out, size_t key_out_len);
+//                      uint8_t *rend_authenticator_out);
+int onion_skin_client_handshake(int type,
+                      const onion_handshake_state_t *handshake_state,
+                      const uint8_t *reply,
+                      uint8_t *keys_out, size_t key_out_len,
+                      uint8_t *rend_authenticator_out);
+
 #endif