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/* 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;
}
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