commit 2824bf3445448fee55a0f302d7ec85a5915e8f18 Author: Andrea Shepard <andrea@torproject.org> Date: Thu May 9 09:31:39 2013 -0700 Use tor_asprintf() and clean up string handling in authority_certs_fetch_missing() --- src/or/routerlist.c | 58 ++++++++++++++++++++++++++------------------------- 1 file changed, 30 insertions(+), 28 deletions(-) diff --git a/src/or/routerlist.c b/src/or/routerlist.c index 15a71e4..8677400 100644 --- a/src/or/routerlist.c +++ b/src/or/routerlist.c @@ -791,23 +791,33 @@ authority_certs_fetch_missing(networkstatus_t *status, time_t now) /* Do downloads by identity digest */ if (smartlist_len(missing_id_digests) > 0) { + int need_plus = 0; smartlist_t *fps = smartlist_new(); + smartlist_add(fps, tor_strdup("fp/")); - SMARTLIST_FOREACH(missing_id_digests, const char *, d, { - char *fp; + SMARTLIST_FOREACH_BEGIN(missing_id_digests, const char *, d) { + char *fp = NULL; + if (digestmap_get(pending_id, d)) continue; - fp = tor_malloc(HEX_DIGEST_LEN+2); - base16_encode(fp, HEX_DIGEST_LEN+1, d, DIGEST_LEN); - fp[HEX_DIGEST_LEN] = '+'; - fp[HEX_DIGEST_LEN+1] = '\0'; + + base16_encode(id_digest_str, sizeof(id_digest_str), + d, DIGEST_LEN); + + if (need_plus) { + tor_asprintf(&fp, "+%s", id_digest_str); + } else { + /* No need for tor_asprintf() in this case; first one gets no '+' */ + fp = tor_strdup(id_digest_str); + need_plus = 1; + } + smartlist_add(fps, fp); - }); + } SMARTLIST_FOREACH_END(d); if (smartlist_len(fps) > 1) { resource = smartlist_join_strings(fps, "", 0, NULL); - resource[strlen(resource)-1] = '\0'; directory_get_from_dirserver(DIR_PURPOSE_FETCH_CERTIFICATE, 0, resource, PDS_RETRY_IF_NO_SERVERS); tor_free(resource); @@ -820,46 +830,38 @@ authority_certs_fetch_missing(networkstatus_t *status, time_t now) /* Do downloads by identity digest/signing key pair */ if (smartlist_len(missing_cert_digests) > 0) { + int need_plus = 0; smartlist_t *fp_pairs = smartlist_new(); - int need_plus = 0, offset = 0; smartlist_add(fp_pairs, tor_strdup("fp-sk/")); SMARTLIST_FOREACH_BEGIN(missing_cert_digests, const fp_pair_t *, d) { - char *fp_pair; + char *fp_pair = NULL; if (fp_pair_map_get(pending_cert, d)) continue; - fp_pair = tor_malloc(2*HEX_DIGEST_LEN+3); - offset = 0; + /* Construct string encodings of the digests */ + base16_encode(id_digest_str, sizeof(id_digest_str), + d->first, DIGEST_LEN); + base16_encode(sk_digest_str, sizeof(sk_digest_str), + d->second, DIGEST_LEN); + + /* Now tor_asprintf() */ if (need_plus) { - fp_pair[offset++] = '+'; + tor_asprintf(&fp_pair, "+%s-%s", id_digest_str, sk_digest_str); } else { - /* Prepend a '+' to all but the first in the list */ + /* First one in the list doesn't get a '+' */ + tor_asprintf(&fp_pair, "%s-%s", id_digest_str, sk_digest_str); need_plus = 1; } - /* Encode the first fingerprint */ - base16_encode(fp_pair + offset, HEX_DIGEST_LEN+1, - d->first, DIGEST_LEN); - offset += HEX_DIGEST_LEN; - /* Add a '-' to separate them */ - fp_pair[offset++] = '-'; - /* Encode the second fingerprint */ - base16_encode(fp_pair + offset, HEX_DIGEST_LEN+1, - d->second, DIGEST_LEN); - offset += HEX_DIGEST_LEN; - /* Add a NUL */ - fp_pair[offset++] = '\0'; - /* Add it to the list of pairs to request */ smartlist_add(fp_pairs, fp_pair); } SMARTLIST_FOREACH_END(d); if (smartlist_len(fp_pairs) > 1) { resource = smartlist_join_strings(fp_pairs, "", 0, NULL); - resource[strlen(resource)-1] = '\0'; directory_get_from_dirserver(DIR_PURPOSE_FETCH_CERTIFICATE, 0, resource, PDS_RETRY_IF_NO_SERVERS); tor_free(resource);