link_t link_key(mesh_t mesh, lob_t key) { uint8_t csid; hashname_t hn; link_t link; if(!mesh || !key) return LOG("invalid args"); csid = hashname_id(mesh->keys,key); if(!csid) return LOG("no supported key"); hn = hashname_key(key); if(!hn) return LOG("invalid key"); link = link_get(mesh, hn->hashname); if(link) { hashname_free(hn); }else{ link = link_new(mesh,hn); } // load key if it's not yet if(!link->key) return link_load(link, csid, key); return link; }
link_t mesh_add(mesh_t mesh, lob_t json, pipe_t pipe) { link_t link; lob_t keys, paths; uint8_t csid; if(!mesh || !json) return LOG("bad args"); LOG("mesh add %s",lob_json(json)); link = link_get(mesh, hashname_vchar(lob_get(json,"hashname"))); keys = lob_get_json(json,"keys"); paths = lob_get_array(json,"paths"); if(!link) link = link_keys(mesh, keys); if(!link) LOG("no hashname"); LOG("loading keys/paths"); if(keys && (csid = hashname_id(mesh->keys,keys))) link_load(link, csid, keys); // handle any pipe/paths if(pipe) link_pipe(link, pipe); lob_t path; for(path=paths;path;path = lob_next(path)) link_path(link,path); lob_free(keys); lob_freeall(paths); return link; }
// process an incoming handshake link_t link_receive_handshake(link_t link, lob_t inner) { uint32_t out, at, err; uint8_t csid = 0; lob_t outer = lob_linked(inner); if(!link || !inner || !outer) return LOG("bad args"); // inner/link must be validated by caller already, we just load if missing if(!link->key) { util_unhex(lob_get(inner, "csid"), 2, &csid); if(!link_load(link, csid, inner)) { lob_free(inner); return LOG("load key failed for %s %u %s",hashname_short(link->id),csid,util_hex(inner->body,inner->body_len,NULL)); } } if((err = e3x_exchange_verify(link->x,outer))) { lob_free(inner); return LOG("handshake verification fail: %d",err); } out = e3x_exchange_out(link->x,0); at = lob_get_uint(inner,"at"); link_t ready = link_up(link); // if bad at, always send current handshake if(e3x_exchange_in(link->x, at) < out) { LOG("old handshake: %s (%d,%d,%d)",lob_json(inner),at,out); link_sync(link); lob_free(inner); return link; } // try to sync ephemeral key if(!e3x_exchange_sync(link->x,outer)) { lob_free(inner); return LOG("sync failed"); } // we may need to re-sync if(out != e3x_exchange_out(link->x,0)) link_sync(link); // notify of ready state change if(!ready && link_up(link)) { LOG("link ready"); mesh_link(link->mesh, link); } link->handshake = lob_free(link->handshake); link->handshake = inner; return link; }
link_t link_get_key(mesh_t mesh, lob_t key, uint8_t csid) { link_t link; if(!mesh || !key) return LOG("invalid args"); if(hashname_id(mesh->keys,key) > csid) return LOG("invalid csid"); link = link_get(mesh, hashname_vkey(key, csid)); if(!link) return LOG("invalid key"); // load key if it's not yet if(!link->key) return link_load(link, csid, key); return link; }