5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 2002 - 2007 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; version 2 of the License.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
19 /* Implementation of Attribute Payload routines */
23 #include "silcattrs.h"
25 /******************************************************************************
29 ******************************************************************************/
31 struct SilcAttributePayloadStruct {
32 SilcAttribute attribute;
33 SilcAttributeFlags flags;
38 /* Internal routine for encoding a attribute */
40 static unsigned char *
41 silc_attribute_payload_encode_int(SilcAttribute attribute,
42 SilcAttributeFlags flags,
44 SilcUInt32 object_size,
47 SilcBuffer tmpbuf = NULL;
48 unsigned char tmp[4], *str = NULL, *ret;
51 /* Encode according to attribute type */
52 if (flags & SILC_ATTRIBUTE_FLAG_VALID) {
53 if (!object && !object_size)
58 case SILC_ATTRIBUTE_USER_INFO:
60 SilcVCard vcard = object;
61 if (object_size != sizeof(*vcard))
63 str = silc_vcard_encode(vcard, &object_size);
70 case SILC_ATTRIBUTE_SERVICE:
72 SilcAttributeObjService *service = object;
74 if (object_size != sizeof(*service))
76 len = strlen(service->address);
77 len2 = strlen(service->signon);
78 tmpbuf = silc_buffer_alloc_size(13 + len + len2);
81 silc_buffer_format(tmpbuf,
82 SILC_STR_UI_INT(service->port),
83 SILC_STR_UI_SHORT(len),
84 SILC_STR_UI_XNSTRING(service->address, len),
85 SILC_STR_UI_CHAR(service->status),
86 SILC_STR_UI_SHORT(len2),
87 SILC_STR_UI_XNSTRING(service->signon, len2),
88 SILC_STR_UI_INT(service->idle),
90 object = tmpbuf->data;
91 object_size = silc_buffer_len(tmpbuf);
95 case SILC_ATTRIBUTE_STATUS_MOOD:
96 case SILC_ATTRIBUTE_PREFERRED_CONTACT:
98 SilcUInt32 mask = SILC_PTR_TO_32(object);
99 if (object_size != sizeof(SilcUInt32))
101 SILC_PUT32_MSB(mask, tmp);
103 object_size = sizeof(SilcUInt32);
107 case SILC_ATTRIBUTE_STATUS_FREETEXT:
108 case SILC_ATTRIBUTE_PREFERRED_LANGUAGE:
109 case SILC_ATTRIBUTE_TIMEZONE:
111 unsigned char *string = object;
112 str = silc_malloc(2 + object_size);
115 SILC_PUT16_MSB(object_size, str);
116 memcpy(str + 2, string, object_size);
122 case SILC_ATTRIBUTE_STATUS_MESSAGE:
123 case SILC_ATTRIBUTE_EXTENSION:
124 case SILC_ATTRIBUTE_USER_ICON:
126 SilcMime mime = object;
127 if (object_size != sizeof(*mime))
129 str = silc_mime_encode(mime, &object_size);
136 case SILC_ATTRIBUTE_GEOLOCATION:
138 SilcAttributeObjGeo *geo = object;
139 SilcUInt32 len1, len2, len3, len4;
140 if (object_size != sizeof(*geo))
142 len1 = (geo->longitude ? strlen(geo->longitude) : 0);
143 len2 = (geo->latitude ? strlen(geo->latitude) : 0);
144 len3 = (geo->altitude ? strlen(geo->altitude) : 0);
145 len4 = (geo->accuracy ? strlen(geo->accuracy) : 0);
146 if (len1 + len2 + len3 + len4 == 0)
148 len = len1 + len2 + len3 + len4;
149 tmpbuf = silc_buffer_alloc_size(8 + len);
152 silc_buffer_format(tmpbuf,
153 SILC_STR_UI_SHORT(len1),
154 SILC_STR_UI16_STRING(len1 ? geo->longitude : ""),
155 SILC_STR_UI_SHORT(len2),
156 SILC_STR_UI16_STRING(len2 ? geo->latitude : ""),
157 SILC_STR_UI_SHORT(len3),
158 SILC_STR_UI16_STRING(len3 ? geo->altitude : ""),
159 SILC_STR_UI_SHORT(len4),
160 SILC_STR_UI16_STRING(len4 ? geo->accuracy : ""),
162 object = tmpbuf->data;
163 object_size = silc_buffer_len(tmpbuf);
167 case SILC_ATTRIBUTE_DEVICE_INFO:
169 SilcAttributeObjDevice *dev = object;
170 SilcUInt32 len1, len2, len3, len4;
171 if (object_size != sizeof(*dev))
173 len1 = (dev->manufacturer ? strlen(dev->manufacturer) : 0);
174 len2 = (dev->version ? strlen(dev->version) : 0);
175 len3 = (dev->model ? strlen(dev->model) : 0);
176 len4 = (dev->language ? strlen(dev->language) : 0);
177 if (len1 + len2 + len3 + len4 == 0)
179 len = len1 + len2 + len3 + len4;
180 tmpbuf = silc_buffer_alloc_size(4 + 8 + len);
183 silc_buffer_format(tmpbuf,
184 SILC_STR_UI_INT(dev->type),
185 SILC_STR_UI_SHORT(len1),
186 SILC_STR_UI16_STRING(len1 ? dev->manufacturer : ""),
187 SILC_STR_UI_SHORT(len2),
188 SILC_STR_UI16_STRING(len2 ? dev->version : ""),
189 SILC_STR_UI_SHORT(len3),
190 SILC_STR_UI16_STRING(len3 ? dev->model : ""),
191 SILC_STR_UI_SHORT(len4),
192 SILC_STR_UI16_STRING(len4 ? dev->language : ""),
194 object = tmpbuf->data;
195 object_size = silc_buffer_len(tmpbuf);
199 case SILC_ATTRIBUTE_PHONE_NUMBER:
201 SilcAttributeObjPN *pn = object;
202 if (object_size != sizeof(*pn))
204 if (!pn->number || strlen(pn->number) < 5)
206 tmpbuf = silc_buffer_alloc(0);
209 if (silc_buffer_format(tmpbuf,
210 SILC_STR_UI_INT(pn->format),
211 SILC_STR_UI_SHORT(strlen(pn->number)),
212 SILC_STR_UI16_STRING(pn->number),
215 object = tmpbuf->data;
216 object_size = silc_buffer_len(tmpbuf);
220 case SILC_ATTRIBUTE_USER_PUBLIC_KEY:
221 case SILC_ATTRIBUTE_SERVER_PUBLIC_KEY:
223 SilcAttributeObjPk *pk = object;
224 if (object_size != sizeof(*pk))
226 len = (pk->type ? strlen(pk->type) : 0);
227 tmpbuf = silc_buffer_alloc_size(2 + len + pk->data_len);
230 silc_buffer_format(tmpbuf,
231 SILC_STR_UI_SHORT(len),
232 SILC_STR_UI16_STRING(pk->type),
233 SILC_STR_UI_XNSTRING(pk->data, pk->data_len),
235 object = tmpbuf->data;
236 object_size = silc_buffer_len(tmpbuf);
240 case SILC_ATTRIBUTE_USER_DIGITAL_SIGNATURE:
241 case SILC_ATTRIBUTE_SERVER_DIGITAL_SIGNATURE:
243 SilcAttributeObjPk *pk = object;
244 if (object_size != sizeof(*pk))
247 object_size = pk->data_len;
256 ret = silc_memdup(object, object_size);
259 silc_buffer_free(tmpbuf);
263 *ret_len = object_size;
271 /* Allocates attribute payload and encodes the attribute there */
273 SilcAttributePayload silc_attribute_payload_alloc(SilcAttribute attribute,
274 SilcAttributeFlags flags,
276 SilcUInt32 object_size)
278 SilcAttributePayload attr;
281 attr = silc_calloc(1, sizeof(*attr));
285 attr->attribute = attribute;
288 silc_attribute_payload_encode_int(attribute, flags, object,
289 object_size, &tmp_len);
290 attr->data_len = (SilcUInt16)tmp_len;
299 /* Parse list of payloads */
301 SilcDList silc_attribute_payload_parse(const unsigned char *payload,
302 SilcUInt32 payload_len)
304 SilcBufferStruct buffer;
306 SilcAttributePayload newp;
310 SILC_LOG_DEBUG(("Parsing Attribute Payload list"));
312 silc_buffer_set(&buffer, (unsigned char *)payload, payload_len);
313 list = silc_dlist_init();
315 while (silc_buffer_len(&buffer)) {
316 newp = silc_calloc(1, sizeof(*newp));
319 ret = silc_buffer_unformat(&buffer,
320 SILC_STR_UI_CHAR(&newp->attribute),
321 SILC_STR_UI_CHAR(&newp->flags),
322 SILC_STR_UI16_NSTRING_ALLOC(&newp->data,
328 if (newp->data_len > silc_buffer_len(&buffer) - 4) {
329 SILC_LOG_ERROR(("Incorrect attribute payload in list"));
333 len = 4 + newp->data_len;
334 if (silc_buffer_len(&buffer) < len)
336 silc_buffer_pull(&buffer, len);
338 silc_dlist_add(list, newp);
344 silc_attribute_payload_list_free(list);
348 /* Encode one attribute payload to buffer */
350 SilcBuffer silc_attribute_payload_encode(SilcBuffer attrs,
351 SilcAttribute attribute,
352 SilcAttributeFlags flags,
354 SilcUInt32 object_size)
356 object = silc_attribute_payload_encode_int(attribute, flags, object,
357 object_size, &object_size);
358 attrs = silc_attribute_payload_encode_data(attrs, attribute, flags,
359 (const unsigned char *)object,
365 /* Encoded the attribute data directly to buffer */
367 SilcBuffer silc_attribute_payload_encode_data(SilcBuffer attrs,
368 SilcAttribute attribute,
369 SilcAttributeFlags flags,
370 const unsigned char *data,
373 SilcBuffer buffer = attrs;
376 len = 4 + (SilcUInt16)data_len;
377 buffer = silc_buffer_realloc(buffer,
378 (buffer ? silc_buffer_truelen(buffer) +
382 silc_buffer_pull(buffer, silc_buffer_len(buffer));
383 silc_buffer_pull_tail(buffer, len);
384 silc_buffer_format(buffer,
385 SILC_STR_UI_CHAR(attribute),
386 SILC_STR_UI_CHAR(flags),
387 SILC_STR_UI_SHORT((SilcUInt16)data_len),
388 SILC_STR_UI_XNSTRING(data, (SilcUInt16)data_len),
390 silc_buffer_push(buffer, buffer->data - buffer->head);
395 /* Free Attribute Payload */
397 void silc_attribute_payload_free(SilcAttributePayload payload)
399 silc_free(payload->data);
403 /* Free's list of Attribute Payloads */
405 void silc_attribute_payload_list_free(SilcDList list)
407 SilcAttributePayload entry;
409 silc_dlist_start(list);
410 while ((entry = silc_dlist_get(list)) != SILC_LIST_END) {
411 silc_attribute_payload_free(entry);
412 silc_dlist_del(list, entry);
415 silc_dlist_uninit(list);
418 /* Return attribute type */
420 SilcAttribute silc_attribute_get_attribute(SilcAttributePayload payload)
422 return payload->attribute;
425 /* Return attribute flags */
427 SilcAttributeFlags silc_attribute_get_flags(SilcAttributePayload payload)
429 return payload->flags;
432 /* Return attribute data from the payload */
434 const unsigned char *silc_attribute_get_data(SilcAttributePayload payload,
435 SilcUInt32 *data_len)
438 *data_len = (SilcUInt32)payload->data_len;
439 return (const unsigned char *)payload->data;
442 /* Construct digital signature verification data */
444 unsigned char *silc_attribute_get_verify_data(SilcDList attrs,
445 SilcBool server_verification,
446 SilcUInt32 *data_len)
448 SilcAttributePayload attr;
449 SilcBufferStruct buffer;
450 unsigned char *data = NULL;
453 silc_dlist_start(attrs);
454 while ((attr = silc_dlist_get(attrs)) != SILC_LIST_END) {
455 switch (attr->attribute) {
456 case SILC_ATTRIBUTE_SERVER_DIGITAL_SIGNATURE:
457 /* Server signature is never part of the verification data */
460 case SILC_ATTRIBUTE_USER_DIGITAL_SIGNATURE:
461 /* For user signature verification this is not part of the data */
462 if (!server_verification)
465 /* Fallback, for server signature verification, user digital signature
466 is part of verification data. */
469 /* All other data is part of the verification data */
470 data = silc_realloc(data, sizeof(*data) * (4 + attr->data_len + len));
473 silc_buffer_set(&buffer, data + len, 4 + attr->data_len);
474 silc_buffer_format(&buffer,
475 SILC_STR_UI_CHAR(attr->attribute),
476 SILC_STR_UI_CHAR(attr->flags),
477 SILC_STR_UI_SHORT(attr->data_len),
478 SILC_STR_UI_XNSTRING(attr->data, attr->data_len),
480 len += 4 + attr->data_len;
491 /* Return parsed attribute object */
493 SilcBool silc_attribute_get_object(SilcAttributePayload payload,
494 void *object, SilcUInt32 object_size)
497 SilcBool ret = FALSE;
499 if (!object || payload->flags & SILC_ATTRIBUTE_FLAG_INVALID)
502 switch (payload->attribute) {
503 case SILC_ATTRIBUTE_USER_INFO:
505 SilcVCard vcard = object;
506 if (object_size != sizeof(*vcard))
508 if (!silc_vcard_decode(payload->data, payload->data_len, vcard))
514 case SILC_ATTRIBUTE_SERVICE:
516 SilcAttributeObjService *service = object;
517 SilcBufferStruct buf;
518 SilcUInt16 addr_len, signon_len;
521 if (object_size != sizeof(*service))
523 if (payload->data_len < 13)
525 silc_buffer_set(&buf, payload->data, payload->data_len);
526 res = silc_buffer_unformat(&buf,
527 SILC_STR_UI_INT(&service->port),
528 SILC_STR_UI16_NSTRING(&addr, &addr_len),
529 SILC_STR_UI_CHAR(&service->status),
530 SILC_STR_UI16_NSTRING(&signon, &signon_len),
531 SILC_STR_UI_INT(&service->idle),
535 memset(service->address, 0, sizeof(service->address));
536 memset(service->signon, 0, sizeof(service->signon));
537 memcpy(service->address, addr,
538 (addr_len < sizeof(service->address) - 1 ? addr_len :
539 sizeof(service->address) - 1));
540 memcpy(service->signon, signon,
541 (signon_len < sizeof(service->signon) - 1 ? signon_len :
542 sizeof(service->signon) - 1));
547 case SILC_ATTRIBUTE_STATUS_MOOD:
548 case SILC_ATTRIBUTE_PREFERRED_CONTACT:
550 SilcUInt32 *mask = (SilcUInt32 *)object;
551 if (object_size != sizeof(SilcUInt32))
553 if (payload->data_len < 4)
555 SILC_GET32_MSB(*mask, payload->data);
560 case SILC_ATTRIBUTE_STATUS_FREETEXT:
561 case SILC_ATTRIBUTE_PREFERRED_LANGUAGE:
562 case SILC_ATTRIBUTE_TIMEZONE:
564 char *string = object;
565 if (payload->data_len < 2)
567 SILC_GET16_MSB(len, payload->data);
568 if (payload->data_len < 2 + len)
570 if (object_size < len)
572 memcpy(string, payload->data + 2, len);
577 case SILC_ATTRIBUTE_STATUS_MESSAGE:
578 case SILC_ATTRIBUTE_EXTENSION:
579 case SILC_ATTRIBUTE_USER_ICON:
581 SilcMime mime = object;
582 if (object_size != sizeof(*mime))
584 if (!silc_mime_decode(mime, payload->data, payload->data_len))
590 case SILC_ATTRIBUTE_GEOLOCATION:
592 SilcAttributeObjGeo *geo = object;
593 SilcBufferStruct buffer;
595 if (object_size != sizeof(*geo))
597 silc_buffer_set(&buffer, (unsigned char *)payload->data,
599 res = silc_buffer_unformat(&buffer,
600 SILC_STR_UI16_STRING_ALLOC(&geo->longitude),
601 SILC_STR_UI16_STRING_ALLOC(&geo->latitude),
602 SILC_STR_UI16_STRING_ALLOC(&geo->altitude),
603 SILC_STR_UI16_STRING_ALLOC(&geo->accuracy),
611 case SILC_ATTRIBUTE_DEVICE_INFO:
613 SilcAttributeObjDevice *dev = object;
614 SilcBufferStruct buffer;
617 if (object_size != sizeof(*dev))
619 silc_buffer_set(&buffer, (unsigned char *)payload->data,
622 silc_buffer_unformat(&buffer,
623 SILC_STR_UI_INT(&type),
624 SILC_STR_UI16_STRING_ALLOC(&dev->manufacturer),
625 SILC_STR_UI16_STRING_ALLOC(&dev->version),
626 SILC_STR_UI16_STRING_ALLOC(&dev->model),
627 SILC_STR_UI16_STRING_ALLOC(&dev->language),
636 case SILC_ATTRIBUTE_PHONE_NUMBER:
638 SilcAttributeObjPN *pn = object;
639 SilcBufferStruct buffer;
640 SilcUInt32 pn_format;
642 if (object_size != sizeof(*pn))
644 silc_buffer_set(&buffer, (unsigned char *)payload->data,
647 silc_buffer_unformat(&buffer,
648 SILC_STR_UI_INT(&pn_format),
649 SILC_STR_UI16_STRING_ALLOC(&pn->number),
653 pn->format = pn_format;
658 case SILC_ATTRIBUTE_USER_PUBLIC_KEY:
659 case SILC_ATTRIBUTE_SERVER_PUBLIC_KEY:
661 SilcAttributeObjPk *pk = object;
662 SilcBufferStruct buffer;
664 if (object_size != sizeof(*pk))
666 silc_buffer_set(&buffer, (unsigned char *)payload->data,
669 silc_buffer_unformat(&buffer,
670 SILC_STR_UI16_NSTRING_ALLOC(&pk->type, &len),
672 if (res == -1 || len > silc_buffer_len(&buffer) - 2)
674 pk->data = silc_memdup(payload->data + 2 + len,
675 payload->data_len - 2 - len);
676 pk->data_len = payload->data_len - 2 - len;
681 case SILC_ATTRIBUTE_USER_DIGITAL_SIGNATURE:
682 case SILC_ATTRIBUTE_SERVER_DIGITAL_SIGNATURE:
684 SilcAttributeObjPk *pk = object;
685 if (object_size != sizeof(*pk))
688 pk->data = silc_memdup(payload->data, payload->data_len);
689 pk->data_len = payload->data_len;