void app_send(struct item *key, struct item *message) /*@ requires [?f0]world(ss_pub) &*& item(key, symmetric_key_item(?creator, ?id), ss_pub) &*& item(message, ?msg, ss_pub) &*& [_]ss_pub(msg) &*& app_send_event(creator, msg) == true; @*/ /*@ ensures [f0]world(ss_pub) &*& item(key, symmetric_key_item(creator, id), ss_pub) &*& item(message, msg, ss_pub); @*/ { struct network_status *net_stat = network_connect("localhost", APP_RECEIVE_PORT); struct item *hash = create_hmac(key, message); //@ assert item(hash, ?h, ss_pub); //@ get_info_for_item(h); //@ close ss_pub(h); //@ leak ss_pub(h); struct item *m = create_pair(hash, message); //@ assert item(m, ?pmessage, ss_pub); //@ get_info_for_item(pmessage); //@ close ss_pub(pmessage); //@ leak ss_pub(pmessage); network_send(net_stat, m); item_free(hash); item_free(m); network_disconnect(net_stat); }
void send_hmac(struct network_status *net_stat, struct keypair *keypair) /*@ requires [?f0]world(?pub, ?key_clsfy) &*& keypair(keypair, ?attacker_id, ?id, ?info, pub) &*& proof_obligations(pub) &*& network_status(net_stat) &*& principal(attacker_id, ?count1) &*& true == bad(attacker_id); @*/ /*@ ensures [f0]world(pub, key_clsfy) &*& keypair(keypair, attacker_id, id, info, pub) &*& proof_obligations(pub) &*& network_status(net_stat) &*& principal(attacker_id, ?count2); @*/ { struct item *key = network_receive(net_stat); //@ assert item(key, ?k, pub); if (is_symmetric_key(key)) { struct item *pay = network_receive(net_stat); //@ assert item(pay, ?p, pub); //@ close hash_item_payload(pub, true, p); //@ leak hash_item_payload(pub, true, p); struct item *mac = create_hmac(key, pay); //@ assert item(mac, ?h, pub); //@ open proof_obligations(pub); /*@ if (col) { assert is_public_collision(?proof, pub); proof(h); } else { assert is_public_hmac(?proof, pub); proof(h); } @*/ //@ close proof_obligations(pub); network_send(net_stat, mac); item_free(mac); item_free(pay); } item_free(key); }
struct item *client(char server, struct item *key, struct item *request) /*@ requires [?f0]world(rpc_pub, rpc_key_clsfy) &*& principal(?client, ?count) &*& item(key, symmetric_key_item(?creator, ?id), rpc_pub) &*& item(request, ?req, rpc_pub) &*& [_]rpc_pub(req) &*& true == request(creator, server, req) &*& shared_with(creator, id) == server; @*/ /*@ ensures [f0]world(rpc_pub, rpc_key_clsfy) &*& principal(client, count) &*& item(key, symmetric_key_item(creator, id), rpc_pub) &*& item(request, req, rpc_pub) &*& item(result, ?resp, rpc_pub) &*& ( col || bad(creator) || bad(server) || response(creator, server, req, resp) ); @*/ { struct network_status *net_stat = network_connect("localhost", SERVER_PORT); { struct item *tag = create_data_item_from_int(0); //@ item d = data_item(chars_of_int(0)); //@ assert item(tag, d, rpc_pub); //@ close rpc_pub(d); //@ leak rpc_pub(d); struct item *payload = create_pair(tag, request); //@ item p = pair_item(d, req); //@ assert item(payload, p, rpc_pub); //@ close rpc_pub(p); //@ leak rpc_pub(p); item_free(tag); struct item *hash = create_hmac(key, payload); //@ item h = hmac_item(creator, id, some(p)); //@ if (!col) assert item(hash, h, rpc_pub); //@ close rpc_pub(h); //@ leak rpc_pub(h); struct item *m = create_pair(hash, payload); //@ assert item(m, ?msg, rpc_pub); //@ item msg0 = pair_item(h, p); //@ if (!col) msg == msg0; //@ close rpc_pub(msg); //@ leak rpc_pub(msg); item_free(hash); item_free(payload); network_send(net_stat, m); item_free(m); } struct item *response; { struct item *r = network_receive(net_stat); check_is_pair(r); //@ assert item(r, pair_item(?h0, ?p0), rpc_pub); struct item *hmac1 = pair_get_first(r); //@ assert item(hmac1, ?h, rpc_pub); struct item *payload = pair_get_second(r); //@ assert item(payload, ?p, rpc_pub); /*@ if (!col) { assert h0 == h; assert p0 == p; open [_]rpc_pub(pair_item(h, p)); open [_]rpc_pub(h); open [_]rpc_pub(p); } @*/ struct item *hmac2 = create_hmac(key, payload); item_check_equal(hmac1, hmac2); item_free(hmac1); item_free(hmac2); item_free(r); //@ assert col || h == hmac_item(creator, id, some(p)); struct item *tag = pair_get_first(payload); check_is_data(tag); int tagValue = item_get_data_as_int(tag); if (tagValue != 1) abort(); //@ item d = data_item(chars_of_int(1)); //@ assert item(tag, ?d0, rpc_pub); //@ assert col || d == d0; item_free(tag); struct item *reqresp = pair_get_second(payload); struct item *request1 = pair_get_first(reqresp); response = pair_get_second(reqresp); //@ assert item(request1, ?req1, rpc_pub); //@ assert item(response, ?resp, rpc_pub); //@ if (!col) assert p == pair_item(d, pair_item(req1, resp)); item_free(payload); item_free(reqresp); item_check_equal(request, request1); //@ assert col || req1 == req; item_free(request1); } network_disconnect(net_stat); return response; }
void server(char server, struct item *key) /*@ requires [?f0]world(rpc_pub, rpc_key_clsfy) &*& principal(server, ?count) &*& item(key, symmetric_key_item(?creator, ?id), rpc_pub) &*& shared_with(creator, id) == server; @*/ /*@ ensures [f0]world(rpc_pub, rpc_key_clsfy) &*& principal(server, count + 1) &*& item(key, symmetric_key_item(creator, id), rpc_pub); @*/ { struct network_status *net_stat = network_bind_and_accept(SERVER_PORT); struct item *request = 0; { struct item *r = network_receive(net_stat); check_is_pair(r); //@ assert item(r, pair_item(?h0, ?p0), rpc_pub); struct item *hmac1 = pair_get_first(r); //@ assert item(hmac1, ?h, rpc_pub); struct item *payload = pair_get_second(r); //@ assert item(payload, ?p, rpc_pub); /*@ if (!col) { assert h0 == h; assert p0 == p; open [_]rpc_pub(pair_item(h, p)); open [_]rpc_pub(h); open [_]rpc_pub(p); } @*/ struct item *hmac2 = create_hmac(key, payload); item_check_equal(hmac1, hmac2); item_free(hmac1); item_free(hmac2); item_free(r); //@ assert col || h == hmac_item(creator, id, some(p)); struct item *tag = pair_get_first(payload); check_is_data(tag); int tagValue = item_get_data_as_int(tag); if (tagValue != 0) abort(); //@ item d = data_item(chars_of_int(0)); request = pair_get_second(payload); /*@ if (!col) { assert item(tag, d, rpc_pub); assert item(request, ?req, rpc_pub); assert p == pair_item(d, req); } @*/ item_free(tag); item_free(payload); } //@ assert item(request, ?req, rpc_pub); struct item *response = compute_response(server, request); //@ assert item(response, ?resp, rpc_pub); { struct item *reqresp = create_pair(request, response); //@ item p = pair_item(req, resp); //@ assert item(reqresp, p, rpc_pub); //@ close rpc_pub(p); //@ leak rpc_pub(p); item_free(response); item_free(request); struct item *tag = create_data_item_from_int(1); struct item *payload = create_pair(tag, reqresp); //@ item d = data_item(chars_of_int(1)); //@ close rpc_pub(d); //@ leak rpc_pub(d); //@ assert item(payload, pair_item(d, p), rpc_pub); //@ close rpc_pub(pair_item(d, p)); //@ leak rpc_pub(pair_item(d, p)); item_free(tag); item_free(reqresp); struct item *hash = create_hmac(key, payload); //@ item h = hmac_item(creator, id, some(pair_item(d, p))); //@ if (!col) assert item(hash, h, rpc_pub); //@ close rpc_pub(h); //@ leak rpc_pub(h); struct item *m = create_pair(hash, payload); //@ assert item(m, ?msg, rpc_pub); //@ if (!col) msg == pair_item(h, pair_item(d, p)); //@ if (!col) assert item(m, msg, rpc_pub); //@ close rpc_pub(msg); //@ leak rpc_pub(msg); item_free(hash); item_free(payload); network_send(net_stat, m); item_free(m); } network_disconnect(net_stat); }