2 This file is part of GNUnet.
3 (C) 2009, 2010, 2011 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
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13 General Public License for more details.
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22 * @file core/gnunet-service-core_kx.h
23 * @brief code for managing the key exchange (SET_KEY, PING, PONG) with other peers
24 * @author Christian Grothoff
26 #ifndef GNUNET_SERVICE_CORE_KX_H
27 #define GNUNET_SERVICE_CORE_KX_H
29 #include "gnunet_util_lib.h"
30 #include "gnunet_transport_service.h"
34 * Information about the status of a key exchange with another peer.
36 struct GSC_KeyExchangeInfo;
40 * We received a EPHEMERAL_KEY message. Validate and update
41 * our key material and status.
43 * @param kx key exchange status for the corresponding peer
44 * @param msg the set key message we received
47 GSC_KX_handle_ephemeral_key (struct GSC_KeyExchangeInfo *kx,
48 const struct GNUNET_MessageHeader *msg);
52 * We received a PING message. Validate and transmit
55 * @param kx key exchange status for the corresponding peer
56 * @param msg the encrypted PING message itself
59 GSC_KX_handle_ping (struct GSC_KeyExchangeInfo *kx,
60 const struct GNUNET_MessageHeader *msg);
64 * We received a PONG message. Validate and update our status.
66 * @param kx key exchange status for the corresponding peer
67 * @param msg the encrypted PONG message itself
70 GSC_KX_handle_pong (struct GSC_KeyExchangeInfo *kx,
71 const struct GNUNET_MessageHeader *msg);
75 * Encrypt and transmit a message with the given payload.
77 * @param kx key exchange context
78 * @param payload payload of the message
79 * @param payload_size number of bytes in 'payload'
82 GSC_KX_encrypt_and_transmit (struct GSC_KeyExchangeInfo *kx,
83 const void *payload, size_t payload_size);
87 * We received an encrypted message. Decrypt, validate and
88 * pass on to the appropriate clients.
90 * @param kx key exchange information context
91 * @param msg encrypted message
94 GSC_KX_handle_encrypted_message (struct GSC_KeyExchangeInfo *kx,
95 const struct GNUNET_MessageHeader *msg);
99 * Start the key exchange with the given peer.
101 * @param pid identity of the peer to do a key exchange with
102 * @return key exchange information context
104 struct GSC_KeyExchangeInfo *
105 GSC_KX_start (const struct GNUNET_PeerIdentity *pid);
109 * Stop key exchange with the given peer. Clean up key material.
111 * @param kx key exchange to stop
114 GSC_KX_stop (struct GSC_KeyExchangeInfo *kx);
118 * Initialize KX subsystem.
120 * @param pk private key to use for the peer
121 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
124 GSC_KX_init (struct GNUNET_CRYPTO_EccPrivateKey *pk);
128 * Shutdown KX subsystem.
134 /* end of gnunet-service-core_kx.h */