123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687 |
- /* Copyright (c) 2016-2017, The Tor Project, Inc. */
- /* See LICENSE for licensing information */
- /**
- * \file hs_service.c
- * \brief Implement next generation hidden service client functionality
- **/
- #include "or.h"
- #include "hs_circuit.h"
- #include "hs_ident.h"
- #include "connection_edge.h"
- #include "rendclient.h"
- #include "hs_client.h"
- /** A prop224 v3 HS circuit successfully connected to the hidden
- * service. Update the stream state at <b>hs_conn_ident</b> appropriately. */
- static void
- hs_client_attempt_succeeded(const hs_ident_edge_conn_t *hs_conn_ident)
- {
- (void) hs_conn_ident;
- /* TODO: When implementing client side */
- return;
- }
- /** A circuit just finished connecting to a hidden service that the stream
- * <b>conn</b> has been waiting for. Let the HS subsystem know about this. */
- void
- hs_client_note_connection_attempt_succeeded(const edge_connection_t *conn)
- {
- tor_assert(connection_edge_is_rendezvous_stream(conn));
- if (BUG(conn->rend_data && conn->hs_ident)) {
- log_warn(LD_BUG, "Stream had both rend_data and hs_ident..."
- "Prioritizing hs_ident");
- }
- if (conn->hs_ident) { /* It's v3: pass it to the prop224 handler */
- hs_client_attempt_succeeded(conn->hs_ident);
- return;
- } else if (conn->rend_data) { /* It's v2: pass it to the legacy handler */
- rend_client_note_connection_attempt_ended(conn->rend_data);
- return;
- }
- }
- /* With the given encoded descriptor in desc_str and the service key in
- * service_identity_pk, decode the descriptor and set the desc pointer with a
- * newly allocated descriptor object.
- *
- * Return 0 on success else a negative value and desc is set to NULL. */
- int
- hs_client_decode_descriptor(const char *desc_str,
- const ed25519_public_key_t *service_identity_pk,
- hs_descriptor_t **desc)
- {
- int ret;
- uint8_t subcredential[DIGEST256_LEN];
- tor_assert(desc_str);
- tor_assert(service_identity_pk);
- tor_assert(desc);
- /* Create subcredential for this HS so that we can decrypt */
- {
- ed25519_public_key_t blinded_pubkey;
- uint64_t current_time_period = hs_get_time_period_num(approx_time());
- hs_build_blinded_pubkey(service_identity_pk, NULL, 0, current_time_period,
- &blinded_pubkey);
- hs_get_subcredential(service_identity_pk, &blinded_pubkey, subcredential);
- }
- /* Parse descriptor */
- ret = hs_desc_decode_descriptor(desc_str, subcredential, desc);
- memwipe(subcredential, 0, sizeof(subcredential));
- if (ret < 0) {
- log_warn(LD_GENERAL, "Could not parse received descriptor as client");
- goto err;
- }
- return 0;
- err:
- return -1;
- }
|