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fcdcb377a4
Because in 95 years, we or our successors will surely care about enforcing the BSD license terms on this code. Right?
60 lines
2 KiB
C
60 lines
2 KiB
C
/* Copyright (c) 2012-2014, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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#ifndef TOR_ONION_NTOR_H
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#define TOR_ONION_NTOR_H
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#include "torint.h"
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#include "crypto_curve25519.h"
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#include "di_ops.h"
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/** State to be maintained by a client between sending an ntor onionskin
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* and receiving a reply. */
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typedef struct ntor_handshake_state_t ntor_handshake_state_t;
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/** Length of an ntor onionskin, as sent from the client to server. */
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#define NTOR_ONIONSKIN_LEN 84
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/** Length of an ntor reply, as sent from server to client. */
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#define NTOR_REPLY_LEN 64
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void ntor_handshake_state_free(ntor_handshake_state_t *state);
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int onion_skin_ntor_create(const uint8_t *router_id,
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const curve25519_public_key_t *router_key,
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ntor_handshake_state_t **handshake_state_out,
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uint8_t *onion_skin_out);
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int onion_skin_ntor_server_handshake(const uint8_t *onion_skin,
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const di_digest256_map_t *private_keys,
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const curve25519_keypair_t *junk_keypair,
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const uint8_t *my_node_id,
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uint8_t *handshake_reply_out,
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uint8_t *key_out,
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size_t key_out_len);
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int onion_skin_ntor_client_handshake(
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const ntor_handshake_state_t *handshake_state,
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const uint8_t *handshake_reply,
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uint8_t *key_out,
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size_t key_out_len);
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#ifdef ONION_NTOR_PRIVATE
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/** Storage held by a client while waiting for an ntor reply from a server. */
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struct ntor_handshake_state_t {
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/** Identity digest of the router we're talking to. */
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uint8_t router_id[DIGEST_LEN];
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/** Onion key of the router we're talking to. */
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curve25519_public_key_t pubkey_B;
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/**
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* Short-lived keypair for use with this handshake.
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* @{ */
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curve25519_secret_key_t seckey_x;
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curve25519_public_key_t pubkey_X;
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/** @} */
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};
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#endif
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#endif
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