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dirvote: Add the bandwidth file digest in the vote
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@ -61,6 +61,9 @@
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#include "lib/encoding/confline.h"
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#include "lib/crypt_ops/crypto_format.h"
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/* Algorithm to use for the bandwidth file digest. */
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#define DIGEST_ALG_BW_FILE DIGEST_SHA256
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/**
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* \file dirvote.c
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* \brief Functions to compute directory consensus, and schedule voting.
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@ -269,6 +272,7 @@ format_networkstatus_vote(crypto_pk_t *private_signing_key,
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char *flag_thresholds = dirserv_get_flag_thresholds_line();
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char *params;
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char *bw_headers_line = NULL;
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char *bw_file_digest = NULL;
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authority_cert_t *cert = v3_ns->cert;
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char *methods =
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make_consensus_method_list(MIN_SUPPORTED_CONSENSUS_METHOD,
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@ -308,6 +312,28 @@ format_networkstatus_vote(crypto_pk_t *private_signing_key,
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tor_free(bw_file_headers);
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}
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/* Create bandwidth-file-digest if applicable.
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* v3_ns->b64_digest_bw_file will contain the digest when V3BandwidthsFile
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* is configured and the bandwidth file could be read, even if it was not
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* parseable.
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*/
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if (!tor_digest256_is_zero((const char *)v3_ns->bw_file_digest256)) {
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/* Encode the digest. */
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char b64_digest_bw_file[BASE64_DIGEST256_LEN+1] = {0};
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if (digest256_to_base64(b64_digest_bw_file,
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(const char *)v3_ns->bw_file_digest256)>0) {
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/* "bandwidth-file-digest" 1*(SP algorithm "=" digest) NL */
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char *digest_algo_b64_digest_bw_file = NULL;
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tor_asprintf(&digest_algo_b64_digest_bw_file, "%s=%s",
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crypto_digest_algorithm_get_name(DIGEST_ALG_BW_FILE),
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b64_digest_bw_file);
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/* No need for tor_strdup(""), format_line_if_present does it. */
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bw_file_digest = format_line_if_present(
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"bandwidth-file-digest", digest_algo_b64_digest_bw_file);
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tor_free(digest_algo_b64_digest_bw_file);
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}
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}
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smartlist_add_asprintf(chunks,
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"network-status-version 3\n"
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"vote-status %s\n"
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@ -327,6 +353,7 @@ format_networkstatus_vote(crypto_pk_t *private_signing_key,
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"contact %s\n"
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"%s" /* shared randomness information */
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"%s" /* bandwidth file headers */
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"%s" /* bandwidth file */
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,
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v3_ns->type == NS_TYPE_VOTE ? "vote" : "opinion",
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methods,
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@ -345,7 +372,8 @@ format_networkstatus_vote(crypto_pk_t *private_signing_key,
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shared_random_vote_str ?
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shared_random_vote_str : "",
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bw_headers_line ?
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bw_headers_line : "");
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bw_headers_line : "",
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bw_file_digest ? bw_file_digest: "");
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tor_free(params);
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tor_free(flags);
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@ -353,6 +381,7 @@ format_networkstatus_vote(crypto_pk_t *private_signing_key,
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tor_free(methods);
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tor_free(shared_random_vote_str);
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tor_free(bw_headers_line);
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tor_free(bw_file_digest);
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if (!tor_digest_is_zero(voter->legacy_id_digest)) {
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char fpbuf[HEX_DIGEST_LEN+1];
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@ -4425,6 +4454,7 @@ dirserv_generate_networkstatus_vote_obj(crypto_pk_t *private_key,
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const int vote_on_reachability = running_long_enough_to_decide_unreachable();
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smartlist_t *microdescriptors = NULL;
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smartlist_t *bw_file_headers = NULL;
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uint8_t bw_file_digest256[DIGEST256_LEN] = {0};
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tor_assert(private_key);
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tor_assert(cert);
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@ -4462,7 +4492,8 @@ dirserv_generate_networkstatus_vote_obj(crypto_pk_t *private_key,
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* set_routerstatus_from_routerinfo() see up-to-date bandwidth info.
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*/
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if (options->V3BandwidthsFile) {
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dirserv_read_measured_bandwidths(options->V3BandwidthsFile, NULL, NULL);
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dirserv_read_measured_bandwidths(options->V3BandwidthsFile, NULL, NULL,
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NULL);
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} else {
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/*
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* No bandwidths file; clear the measured bandwidth cache in case we had
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@ -4567,7 +4598,9 @@ dirserv_generate_networkstatus_vote_obj(crypto_pk_t *private_key,
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/* Only set bw_file_headers when V3BandwidthsFile is configured */
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bw_file_headers = smartlist_new();
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dirserv_read_measured_bandwidths(options->V3BandwidthsFile,
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routerstatuses, bw_file_headers);
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routerstatuses, bw_file_headers,
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bw_file_digest256);
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} else {
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/*
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* No bandwidths file; clear the measured bandwidth cache in case we had
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@ -4664,6 +4697,7 @@ dirserv_generate_networkstatus_vote_obj(crypto_pk_t *private_key,
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smartlist_sort_strings(v3_out->net_params);
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}
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v3_out->bw_file_headers = bw_file_headers;
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memcpy(v3_out->bw_file_digest256, bw_file_digest256, DIGEST256_LEN);
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voter = tor_malloc_zero(sizeof(networkstatus_voter_info_t));
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voter->nickname = tor_strdup(options->Nickname);
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@ -99,6 +99,9 @@ struct networkstatus_t {
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/** List of key=value strings from the headers of the bandwidth list file */
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smartlist_t *bw_file_headers;
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/** A SHA256 digest of the bandwidth file used in a vote. */
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uint8_t bw_file_digest256[DIGEST256_LEN];
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};
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#endif
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