-
-/*
- * parse_subpackets - Parse the subpackets of a Type 4 signature.
- * @data: The subpacket data.
- * @keyid: A pointer to where we should return the keyid.
- *
- * This function parses the subkey data of a Type 4 signature and fills
- * in the supplied variables. It also returns the length of the data
- * processed.
- */
-int parse_subpackets(unsigned char *data, uint64_t *keyid)
-{
- int offset = 0;
- int length = 0;
- int packetlen = 0;
-
- assert(data != NULL);
-
- length = (data[0] << 8) + data[1] + 2;
-
- offset = 2;
- while (offset < length) {
- packetlen = data[offset++];
- if (packetlen > 191 && packetlen < 255) {
- packetlen = ((packetlen - 192) << 8) +
- data[offset++] + 192;
- } else if (packetlen == 255) {
- packetlen = data[offset++];
- packetlen <<= 8;
- packetlen = data[offset++];
- packetlen <<= 8;
- packetlen = data[offset++];
- packetlen <<= 8;
- packetlen = data[offset++];
- }
- switch (data[offset]) {
- case 2:
- /*
- * Signature creation time. Might want to output this?
- */
- break;
- case 0x83:
- /*
- * Signature expiration time. Might want to output this?
- */
- break;
- case 16:
- *keyid = data[offset+packetlen - 8];
- *keyid <<= 8;
- *keyid += data[offset+packetlen - 7];
- *keyid <<= 8;
- *keyid += data[offset+packetlen - 6];
- *keyid <<= 8;
- *keyid += data[offset+packetlen - 5];
- *keyid <<= 8;
- *keyid += data[offset+packetlen - 4];
- *keyid <<= 8;
- *keyid += data[offset+packetlen - 3];
- *keyid <<= 8;
- *keyid += data[offset+packetlen - 2];
- *keyid <<= 8;
- *keyid += data[offset+packetlen - 1];
- break;
- case 23:
- /*
- * Key server preferences. Including no-modify.
- */
- break;
- case 25:
- /*
- * Primary UID.
- */
- break;
- default:
- /*
- * We don't care about unrecognized packets unless bit
- * 7 is set in which case we prefer an error than
- * ignoring it.
- */
- assert(!(data[offset] & 0x80));
- }
- offset += packetlen;
- }
-
- return length;
-}
-
-/**
- * keysigs - Return the sigs on a given OpenPGP signature list.
- * @curll: The current linked list. Can be NULL to create a new list.
- * @sigs: The signature list we want the sigs on.
- *
- * Returns a linked list of stats_key elements containing the sigs on the
- * supplied OpenPGP packet list.
- */
-struct ll *keysigs(struct ll *curll,
- struct openpgp_packet_list *sigs)
-{
- uint64_t keyid = 0;
-
- while (sigs != NULL) {
- keyid = sig_keyid(sigs->packet);
- sigs = sigs->next;
- curll = lladd(curll, createandaddtohash(keyid));
- }
-
- return curll;
-}
-
-/**
- * sig_keyid - Return the keyid for a given OpenPGP signature packet.
- * @packet: The signature packet.
- *
- * Returns the keyid for the supplied signature packet.
- */
-uint64_t sig_keyid(struct openpgp_packet *packet)
-{
- int length = 0;
- uint64_t keyid = 0;
-
- if (packet != NULL) {
- keyid = 0;
- switch (packet->data[0]) {
- case 2:
- case 3:
- keyid = packet->data[7];
- keyid <<= 8;
- keyid += packet->data[8];
- keyid <<= 8;
- keyid += packet->data[9];
- keyid <<= 8;
- keyid += packet->data[10];
- keyid <<= 8;
- keyid += packet->data[11];
- keyid <<= 8;
- keyid += packet->data[12];
- keyid <<= 8;
- keyid += packet->data[13];
- keyid <<= 8;
- keyid += packet->data[14];
- break;
- case 4:
- length = parse_subpackets(&packet->data[4],
- &keyid);
- parse_subpackets(&packet->data[length + 4],
- &keyid);
- /*
- * Don't bother to look at the unsigned packets.
- */
- break;
- default:
- break;
- }
- }
-
- return keyid;
-}
-
-/*
- * TODO: Abstract out; all our linked lists should be generic and then we can
- * llsize them.
- */
-int spsize(struct openpgp_signedpacket_list *list)
-{
- int size = 0;
- struct openpgp_signedpacket_list *cur;
-
- for (cur = list; cur != NULL; cur = cur->next, size++) ;
-
- return size;
-}
-
-/**
- * keyuids - Takes a key and returns an array of its UIDs
- * @key: The key to get the uids of.
- * @primary: A pointer to store the primary UID in.
- *
- * keyuids takes a public key structure and builds an array of the UIDs
- * on the key. It also attempts to work out the primary UID and returns a
- * separate pointer to that particular element of the array.
- */
-char **keyuids(struct openpgp_publickey *key, char **primary)
-{
- struct openpgp_signedpacket_list *curuid = NULL;
- char buf[1024];
- char **uids = NULL;
- int count = 0;
-
- if (key != NULL && key->uids != NULL) {
- uids = malloc((spsize(key->uids) + 1) * sizeof (char *));
-
- curuid = key->uids;
- while (curuid != NULL) {
- buf[0] = 0;
- if (curuid->packet->tag == 13) {
- snprintf(buf, 1023, "%.*s",
- (int) curuid->packet->length,
- curuid->packet->data);
- uids[count++] = strdup(buf);
- }
- curuid = curuid -> next;
- }
- uids[count] = NULL;
- }
- /*
- * TODO: Parse subpackets for real primary ID (v4 keys)
- */
- if (primary != NULL) {
- *primary = uids[0];
- }
-
- return uids;
-}
projects / onak.git / blobdiff