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Diffstat (limited to 'src/protocols/ec25519_fhmqvc/ec25519_fhmqvc.h')
| -rw-r--r-- | src/protocols/ec25519_fhmqvc/ec25519_fhmqvc.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/protocols/ec25519_fhmqvc/ec25519_fhmqvc.h b/src/protocols/ec25519_fhmqvc/ec25519_fhmqvc.h new file mode 100644 index 0000000..c11a995 --- /dev/null +++ b/src/protocols/ec25519_fhmqvc/ec25519_fhmqvc.h @@ -0,0 +1,131 @@ +/* + Copyright (c) 2012-2013, Matthias Schiffer <mschiffer@universe-factory.net> + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + + +#ifndef _FASTD_PROTOCOL_EC25519_FHMQVC_H_ +#define _FASTD_PROTOCOL_EC25519_FHMQVC_H_ + +#include "../../fastd.h" +#include "../../peer.h" +#include "../../sha256.h" + +#include <libuecc/ecc.h> + + +typedef ecc_int256_t __attribute__((aligned(4))) aligned_int256_t; + +typedef struct keypair { + ecc_int256_t secret; + aligned_int256_t public; +} keypair_t; + +struct fastd_protocol_config { + keypair_t key; +}; + +typedef struct handshake_key { + uint64_t serial; + struct timespec preferred_till; + struct timespec valid_till; + + /* keypair used as initiator */ + keypair_t key1; + + /* keypair used as responder */ + keypair_t key2; +} handshake_key_t; + +struct fastd_protocol_state { + handshake_key_t prev_handshake_key; + handshake_key_t handshake_key; +}; + +struct fastd_protocol_peer_config { + aligned_int256_t public_key; +}; + +typedef struct protocol_session { + struct timespec established; + + bool handshakes_cleaned; + bool refreshing; + + const fastd_method_t *method; + fastd_method_session_state_t *method_state; +} protocol_session_t; + +struct fastd_protocol_peer_state { + protocol_session_t old_session; + protocol_session_t session; + + uint64_t last_serial; + + /* handshake cache */ + uint64_t last_handshake_serial; + aligned_int256_t peer_handshake_key; + aligned_int256_t sigma; + fastd_sha256_t shared_handshake_key; +}; + + +bool fastd_protocol_ec25519_fhmqvc_peer_check(fastd_context_t *ctx, fastd_peer_config_t *peer_conf); +bool fastd_protocol_ec25519_fhmqvc_peer_check_temporary(fastd_context_t *ctx, fastd_peer_t *peer); + +void fastd_protocol_ec25519_fhmqvc_maintenance(fastd_context_t *ctx); +void fastd_protocol_ec25519_fhmqvc_init_peer_state(fastd_context_t *ctx, fastd_peer_t *peer); +void fastd_protocol_ec25519_fhmqvc_reset_peer_state(fastd_context_t *ctx, fastd_peer_t *peer); +void fastd_protocol_ec25519_fhmqvc_free_peer_state(fastd_context_t *ctx, fastd_peer_t *peer); + +void fastd_protocol_ec25519_fhmqvc_handshake_init(fastd_context_t *ctx, const fastd_socket_t *sock, const fastd_peer_address_t *local_addr, const fastd_peer_address_t *remote_addr, fastd_peer_t *peer); +void fastd_protocol_ec25519_fhmqvc_handshake_handle(fastd_context_t *ctx, fastd_socket_t *sock, const fastd_peer_address_t *local_addr, const fastd_peer_address_t *remote_addr, fastd_peer_t *peer, const fastd_handshake_t *handshake, const char *method); + +void fastd_protocol_ec25519_fhmqvc_send_empty(fastd_context_t *ctx, fastd_peer_t *peer, protocol_session_t *session); + +void fastd_protocol_ec25519_fhmqvc_generate_key(fastd_context_t *ctx); +void fastd_protocol_ec25519_fhmqvc_show_key(fastd_context_t *ctx); +void fastd_protocol_ec25519_fhmqvc_set_shell_env(fastd_context_t *ctx, const fastd_peer_t *peer); +bool fastd_protocol_ec25519_fhmqvc_describe_peer(const fastd_context_t *ctx UNUSED, const fastd_peer_t *peer, char *buf, size_t len); + + +static inline void hexdump(char out[65], const unsigned char d[32]) { + int i; + for (i = 0; i < 32; i++) + snprintf(out+2*i, 3, "%02x", d[i]); +} + + +static inline bool is_handshake_key_valid(fastd_context_t *ctx, const handshake_key_t *handshake_key) { + return timespec_after(&handshake_key->valid_till, &ctx->now); +} + +static inline bool is_handshake_key_preferred(fastd_context_t *ctx, const handshake_key_t *handshake_key) { + return timespec_after(&handshake_key->preferred_till, &ctx->now); +} + +static inline bool is_session_valid(fastd_context_t *ctx, const protocol_session_t *session) { + return (session->method && session->method->session_is_valid(ctx, session->method_state)); +} + +#endif /* _FASTD_PROTOCOL_EC25519_FHMQVC_H_ */ |