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Extract intro point onion key even with multiple types.
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@ -1657,6 +1657,50 @@ decode_intro_legacy_key(const directory_token_t *tok,
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return -1;
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}
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/* Dig into the descriptor <b>tokens</b> to find the onion key we should use
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* for this intro point, and set it into <b>onion_key_out</b>. Return 0 if it
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* was found and well-formed, otherwise return -1 in case of errors. */
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static int
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set_intro_point_onion_key(curve25519_public_key_t *onion_key_out,
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const smartlist_t *tokens)
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{
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int retval = -1;
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smartlist_t *onion_keys = NULL;
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tor_assert(onion_key_out);
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onion_keys = find_all_by_keyword(tokens, R3_INTRO_ONION_KEY);
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if (!onion_keys) {
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log_warn(LD_REND, "Descriptor did not contain intro onion keys");
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goto err;
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}
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SMARTLIST_FOREACH_BEGIN(onion_keys, directory_token_t *, tok) {
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/* This field is using GE(2) so for possible forward compatibility, we
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* accept more fields but must be at least 2. */
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tor_assert(tok->n_args >= 2);
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/* Try to find an ntor key, it's the only recognized type right now */
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if (!strcmp(tok->args[0], "ntor")) {
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if (curve25519_public_from_base64(onion_key_out, tok->args[1]) < 0) {
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log_warn(LD_REND, "Introduction point ntor onion-key is invalid");
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goto err;
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}
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/* Got the onion key! Set the appropriate retval */
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retval = 0;
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}
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} SMARTLIST_FOREACH_END(tok);
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/* Log an error if we didn't find it :( */
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if (retval < 0) {
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log_warn(LD_REND, "Descriptor did not contain ntor onion keys");
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}
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err:
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smartlist_free(onion_keys);
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return retval;
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}
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/* Given the start of a section and the end of it, decode a single
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* introduction point from that section. Return a newly allocated introduction
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* point object containing the decoded data. Return NULL if the section can't
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@ -1696,19 +1740,7 @@ decode_introduction_point(const hs_descriptor_t *desc, const char *start)
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}
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/* "onion-key" SP ntor SP key NL */
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tok = find_by_keyword(tokens, R3_INTRO_ONION_KEY);
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if (!strcmp(tok->args[0], "ntor")) {
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/* This field is using GE(2) so for possible forward compatibility, we
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* accept more fields but must be at least 2. */
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tor_assert(tok->n_args >= 2);
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if (curve25519_public_from_base64(&ip->onion_key, tok->args[1]) < 0) {
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log_warn(LD_REND, "Introduction point ntor onion-key is invalid");
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goto err;
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}
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} else {
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/* Unknown key type so we can't use that introduction point. */
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log_warn(LD_REND, "Introduction point onion key is unrecognized.");
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if (set_intro_point_onion_key(&ip->onion_key, tokens) < 0) {
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goto err;
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}
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@ -436,7 +436,7 @@ find_opt_by_keyword(smartlist_t *s, directory_keyword keyword)
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* in the same order in which they occur in <b>s</b>. Otherwise return
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* NULL. */
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smartlist_t *
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find_all_by_keyword(smartlist_t *s, directory_keyword k)
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find_all_by_keyword(const smartlist_t *s, directory_keyword k)
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{
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smartlist_t *out = NULL;
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SMARTLIST_FOREACH(s, directory_token_t *, t,
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@ -316,7 +316,7 @@ directory_token_t *find_by_keyword_(smartlist_t *s,
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directory_token_t *find_opt_by_keyword(smartlist_t *s,
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directory_keyword keyword);
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smartlist_t * find_all_by_keyword(smartlist_t *s, directory_keyword k);
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smartlist_t * find_all_by_keyword(const smartlist_t *s, directory_keyword k);
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#endif /* TOR_PARSECOMMON_H */
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