Move literally everything out of src/or

This commit won't build yet -- it just puts everything in a slightly
more logical place.

The reasoning here is that "src/core" will hold the stuff that every (or
nearly every) tor instance will need in order to do onion routing.
Other features (including some necessary ones) will live in
"src/feature".  The "src/app" directory will hold the stuff needed
to have Tor be an application you can actually run.

This commit DOES NOT refactor the former contents of src/or into a
logical set of acyclic libraries, or change any code at all.  That
will have to come in the future.

We will continue to move things around and split them in the future,
but I hope this lays a reasonable groundwork for doing so.

1 files changed, 40 insertions, 0 deletions

diff --git a/src/core/crypto/onion_tap.h b/src/core/crypto/onion_tap.h
new file mode 100644
index 0000000000..9a3df684d6
--- /dev/null
+++ b/src/core/crypto/onion_tap.h
@@ -0,0 +1,40 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file onion_tap.h
+ * \brief Header file for onion_tap.c.
+ **/
+
+#ifndef TOR_ONION_TAP_H
+#define TOR_ONION_TAP_H
+
+#define TAP_ONIONSKIN_CHALLENGE_LEN (PKCS1_OAEP_PADDING_OVERHEAD+\
+                                 CIPHER_KEY_LEN+\
+                                 DH1024_KEY_LEN)
+#define TAP_ONIONSKIN_REPLY_LEN (DH1024_KEY_LEN+DIGEST_LEN)
+
+struct crypto_dh_t;
+struct crypto_pk_t;
+
+int onion_skin_TAP_create(struct crypto_pk_t *router_key,
+                      struct crypto_dh_t **handshake_state_out,
+                      char *onion_skin_out);
+
+int onion_skin_TAP_server_handshake(const char *onion_skin,
+                                struct crypto_pk_t *private_key,
+                                struct crypto_pk_t *prev_private_key,
+                                char *handshake_reply_out,
+                                char *key_out,
+                                size_t key_out_len);
+
+int onion_skin_TAP_client_handshake(struct crypto_dh_t *handshake_state,
+                                const char *handshake_reply,
+                                char *key_out,
+                                size_t key_out_len,
+                                const char **msg_out);
+
+#endif /* !defined(TOR_ONION_TAP_H) */