2 * photoid.c - Routines for OpenPGP id photos.
4 * Copyright 2004 Jonathan McDowell <noodles@earth.li>
6 * This program is free software: you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the Free
8 * Software Foundation; version 2 of the License.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program. If not, see <https://www.gnu.org/licenses/>.
21 #include "keystructs.h"
26 * getphoto - returns an OpenPGP packet containing a photo id.
27 * @key: The key to return the photo id from.
28 * @index: The index of the photo to return.
29 * @photo: The photo data.
30 * @length: The length of the photo data.
32 * This function returns the photo data contained in a supplied key.
33 * index specifies which photo id should be returned. If there's no such
34 * photo id NULL is returned. The returned data pointer refers to the key
35 * data supplied rather than a copy of it.
37 onak_status_t getphoto(struct openpgp_publickey *key, int index,
38 unsigned char **photo, size_t *length)
40 struct openpgp_signedpacket_list *curuid = NULL;
44 if (key == NULL || photo == NULL || length == NULL)
45 return ONAK_E_INVALID_PARAM;
51 while (*photo == NULL && curuid != NULL && i <= index) {
52 if (curuid->packet->tag == 17) {
55 *length = curuid->packet->data[j++];
57 /* length is correct */
58 } else if (*length < 255) {
61 *length += curuid->packet->data[j++];
64 *length = curuid->packet->data[j++];
66 *length += curuid->packet->data[j++];
68 *length += curuid->packet->data[j++];
70 *length += curuid->packet->data[j++];
74 *photo = &(curuid->packet->data[j+16]);
79 curuid = curuid->next;
82 return *photo == NULL ? ONAK_E_NOT_FOUND : ONAK_E_OK;