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-rw-r--r--src/or/onion_tap.h37
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diff --git a/src/or/onion_tap.h b/src/or/onion_tap.h
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+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2013, 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+\
+ DH_KEY_LEN)
+#define TAP_ONIONSKIN_REPLY_LEN (DH_KEY_LEN+DIGEST_LEN)
+
+int onion_skin_TAP_create(crypto_pk_t *router_key,
+ crypto_dh_t **handshake_state_out,
+ char *onion_skin_out);
+
+int onion_skin_TAP_server_handshake(const char *onion_skin,
+ crypto_pk_t *private_key,
+ crypto_pk_t *prev_private_key,
+ char *handshake_reply_out,
+ char *key_out,
+ size_t key_out_len);
+
+int onion_skin_TAP_client_handshake(crypto_dh_t *handshake_state,
+ const char *handshake_reply,
+ char *key_out,
+ size_t key_out_len);
+
+#endif
+