-int id_h(connection_t *c)
-{
- char name[MAX_STRING_SIZE];
- int bla;
-cp
- if(sscanf(c->buffer, "%*d "MAX_STRING" %d", name, &c->protocol_version) != 2)
- {
- syslog(LOG_ERR, _("Got bad %s from %s (%s)"), "ID", c->name, c->hostname);
- return -1;
- }
-
- /* Check if identity is a valid name */
-
- if(check_id(name))
- {
- syslog(LOG_ERR, _("Got bad %s from %s (%s): %s"), "ID", c->name, c->hostname, "invalid name");
- return -1;
- }
-
- /* If we set c->name in advance, make sure we are connected to the right host */
-
- if(c->name)
- {
- if(strcmp(c->name, name))
- {
- syslog(LOG_ERR, _("Peer %s is %s instead of %s"), c->hostname, name, c->name);
- return -1;
- }
- }
- else
- c->name = xstrdup(name);
-
- /* Check if version matches */
-
- if(c->protocol_version != myself->connection->protocol_version)
- {
- syslog(LOG_ERR, _("Peer %s (%s) uses incompatible version %d"),
- c->name, c->hostname, c->protocol_version);
- return -1;
- }
-
- if(bypass_security)
- {
- if(!c->config_tree)
- init_configuration(&c->config_tree);
- c->allow_request = ACK;
- return send_ack(c);
- }
-
- if(!c->config_tree)
- {
- init_configuration(&c->config_tree);
-
- if((bla = read_connection_config(c)))
- {
- syslog(LOG_ERR, _("Peer %s had unknown identity (%s)"), c->hostname, c->name);
- return -1;
- }
- }
-
- if(read_rsa_public_key(c))
- {
- return -1;
- }
-
- /* Check some options */
-
- if((get_config_bool(lookup_config(c->config_tree, "IndirectData"), &bla) && bla) || myself->options & OPTION_INDIRECT)
- c->options |= OPTION_INDIRECT;
-
- if((get_config_bool(lookup_config(c->config_tree, "TCPOnly"), &bla) && bla) || myself->options & OPTION_TCPONLY)
- c->options |= OPTION_TCPONLY | OPTION_INDIRECT;
-
- c->allow_request = METAKEY;
-cp
- return send_metakey(c);
+static bool receive_invitation_sptps(void *handle, uint8_t type, const void *data, uint16_t len) {
+ connection_t *c = handle;
+
+ if(type == 128)
+ return true;
+
+ if(type == 1 && c->status.invitation_used)
+ return finalize_invitation(c, data, len);
+
+ if(type != 0 || len != 18 || c->status.invitation_used)
+ return false;
+
+ // Recover the filename from the cookie and the key
+ char *fingerprint = ecdsa_get_base64_public_key(invitation_key);
+ char hashbuf[18 + strlen(fingerprint)];
+ char cookie[64];
+ memcpy(hashbuf, data, 18);
+ memcpy(hashbuf + 18, fingerprint, sizeof hashbuf - 18);
+ sha512(hashbuf, sizeof hashbuf, cookie);
+ b64encode_urlsafe(cookie, cookie, 18);
+ free(fingerprint);
+
+ char filename[PATH_MAX], usedname[PATH_MAX];
+ snprintf(filename, sizeof filename, "%s" SLASH "invitations" SLASH "%s", confbase, cookie);
+ snprintf(usedname, sizeof usedname, "%s" SLASH "invitations" SLASH "%s.used", confbase, cookie);
+
+ // Atomically rename the invitation file
+ if(rename(filename, usedname)) {
+ if(errno == ENOENT)
+ logger(DEBUG_ALWAYS, LOG_ERR, "Peer %s tried to use non-existing invitation %s\n", c->hostname, cookie);
+ else
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error trying to rename invitation %s\n", cookie);
+ return false;
+ }
+
+ // Open the renamed file
+ FILE *f = fopen(usedname, "r");
+ if(!f) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error trying to open invitation %s\n", cookie);
+ return false;
+ }
+
+ // Read the new node's Name from the file
+ char buf[1024];
+ fgets(buf, sizeof buf, f);
+ if(*buf)
+ buf[strlen(buf) - 1] = 0;
+
+ len = strcspn(buf, " \t=");
+ char *name = buf + len;
+ name += strspn(name, " \t");
+ if(*name == '=') {
+ name++;
+ name += strspn(name, " \t");
+ }
+ buf[len] = 0;
+
+ if(!*buf || !*name || strcasecmp(buf, "Name") || !check_id(name)) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Invalid invitation file %s\n", cookie);
+ fclose(f);
+ return false;
+ }
+
+ free(c->name);
+ c->name = xstrdup(name);
+
+ // Send the node the contents of the invitation file
+ rewind(f);
+ size_t result;
+ while((result = fread(buf, 1, sizeof buf, f)))
+ sptps_send_record(&c->sptps, 0, buf, result);
+ sptps_send_record(&c->sptps, 1, buf, 0);
+ fclose(f);
+ unlink(usedname);
+
+ c->status.invitation_used = true;
+
+ logger(DEBUG_CONNECTIONS, LOG_INFO, "Invitation %s succesfully sent to %s (%s)", cookie, c->name, c->hostname);
+ return true;