5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 2002 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 */
22 #include "silcincludes.h"
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;
73 if (object_size != sizeof(*service))
75 len = strlen(service->address);
76 str = silc_malloc(7 + len);
79 SILC_PUT32_MSB(service->port, str);
80 SILC_PUT16_MSB(len, str + 4);
81 memcpy(str + 6, service->address, len);
82 str[6 + len] = service->status;
84 object_size = 7 + len;
88 case SILC_ATTRIBUTE_STATUS_MOOD:
89 case SILC_ATTRIBUTE_PREFERRED_CONTACT:
91 SilcUInt32 mask = (SilcUInt32)object;
92 if (object_size != sizeof(SilcUInt32))
94 SILC_PUT32_MSB(mask, tmp);
96 object_size = sizeof(SilcUInt32);
100 case SILC_ATTRIBUTE_STATUS_FREETEXT:
101 case SILC_ATTRIBUTE_PREFERRED_LANGUAGE:
102 case SILC_ATTRIBUTE_TIMEZONE:
104 unsigned char *string = object;
105 str = silc_malloc(2 + object_size);
108 SILC_PUT16_MSB(object_size, str);
109 memcpy(str + 2, string, object_size);
115 case SILC_ATTRIBUTE_STATUS_MESSAGE:
116 case SILC_ATTRIBUTE_EXTENSION:
118 SilcAttributeObjMime *mime = object;
119 if (object_size != sizeof(*mime))
121 object = (void *)mime->mime;
122 object_size = mime->mime_len;
126 case SILC_ATTRIBUTE_GEOLOCATION:
128 SilcAttributeObjGeo *geo = object;
129 if (object_size != sizeof(*geo))
132 (geo->longitude ? strlen(geo->longitude) : 0) +
133 (geo->latitude ? strlen(geo->latitude) : 0) +
134 (geo->altitude ? strlen(geo->altitude) : 0) +
135 (geo->accuracy ? strlen(geo->accuracy) : 0);
138 tmpbuf = silc_buffer_alloc_size(8 + len);
141 silc_buffer_format(tmpbuf,
142 SILC_STR_UI_SHORT(strlen(geo->longitude)),
143 SILC_STR_UI16_STRING(geo->longitude),
144 SILC_STR_UI_SHORT(strlen(geo->latitude)),
145 SILC_STR_UI16_STRING(geo->latitude),
146 SILC_STR_UI_SHORT(strlen(geo->altitude)),
147 SILC_STR_UI16_STRING(geo->altitude),
148 SILC_STR_UI_SHORT(strlen(geo->accuracy)),
149 SILC_STR_UI16_STRING(geo->accuracy),
151 object = tmpbuf->data;
152 object_size = tmpbuf->len;
156 case SILC_ATTRIBUTE_DEVICE_INFO:
158 SilcAttributeObjDevice *dev = object;
159 if (object_size != sizeof(*dev))
162 (dev->manufacturer ? strlen(dev->manufacturer) : 0) +
163 (dev->version ? strlen(dev->version) : 0) +
164 (dev->model ? strlen(dev->model) : 0) +
165 (dev->language ? strlen(dev->language) : 0);
166 tmpbuf = silc_buffer_alloc_size(4 + 8 + len);
169 silc_buffer_format(tmpbuf,
170 SILC_STR_UI_INT(dev->type),
171 SILC_STR_UI_SHORT(strlen(dev->manufacturer)),
172 SILC_STR_UI16_STRING(dev->manufacturer),
173 SILC_STR_UI_SHORT(strlen(dev->version)),
174 SILC_STR_UI16_STRING(dev->version),
175 SILC_STR_UI_SHORT(strlen(dev->model)),
176 SILC_STR_UI16_STRING(dev->model),
177 SILC_STR_UI_SHORT(strlen(dev->language)),
178 SILC_STR_UI16_STRING(dev->language),
180 object = tmpbuf->data;
181 object_size = tmpbuf->len;
185 case SILC_ATTRIBUTE_USER_PUBLIC_KEY:
186 case SILC_ATTRIBUTE_SERVER_PUBLIC_KEY:
188 SilcAttributeObjPk *pk = object;
189 if (object_size != sizeof(*pk))
191 len = (pk->type ? strlen(pk->type) : 0);
192 tmpbuf = silc_buffer_alloc_size(2 + len + pk->data_len);
195 silc_buffer_format(tmpbuf,
196 SILC_STR_UI_SHORT(len),
197 SILC_STR_UI16_STRING(pk->type),
198 SILC_STR_UI_XNSTRING(pk->data, pk->data_len),
200 object = tmpbuf->data;
201 object_size = tmpbuf->len;
205 case SILC_ATTRIBUTE_USER_DIGITAL_SIGNATURE:
206 case SILC_ATTRIBUTE_SERVER_DIGITAL_SIGNATURE:
208 SilcAttributeObjPk *pk = object;
209 if (object_size != sizeof(*pk))
212 object_size = pk->data_len;
221 ret = silc_memdup(object, object_size);
224 silc_buffer_free(tmpbuf);
228 *ret_len = object_size;
236 /* Allocates attribute payload and encodes the attribute there */
238 SilcAttributePayload silc_attribute_payload_alloc(SilcAttribute attribute,
239 SilcAttributeFlags flags,
241 SilcUInt32 object_size)
243 SilcAttributePayload attr;
245 attr = silc_calloc(1, sizeof(*attr));
249 attr->attribute = attribute;
252 silc_attribute_payload_encode_int(attribute, flags, object,
254 (SilcUInt32 *)&attr->data_len);
263 /* Parse list of payloads */
265 SilcDList silc_attribute_payload_parse(const unsigned char *payload,
266 SilcUInt32 payload_len)
268 SilcBufferStruct buffer;
270 SilcAttributePayload newp;
273 SILC_LOG_DEBUG(("Parsing Attribute Payload list"));
275 silc_buffer_set(&buffer, (unsigned char *)payload, payload_len);
276 list = silc_dlist_init();
279 newp = silc_calloc(1, sizeof(*newp));
282 ret = silc_buffer_unformat(&buffer,
283 SILC_STR_UI_CHAR(&newp->attribute),
284 SILC_STR_UI_CHAR(&newp->flags),
285 SILC_STR_UI16_NSTRING_ALLOC(&newp->data,
291 if (newp->data_len > buffer.len) {
292 SILC_LOG_ERROR(("Incorrect attribute payload in list"));
296 len = 4 + newp->data_len;
297 if (buffer.len < len)
299 silc_buffer_pull(&buffer, len);
301 silc_dlist_add(list, newp);
307 silc_attribute_payload_list_free(list);
311 /* Encode one attribute payload to buffer */
313 SilcBuffer silc_attribute_payload_encode(SilcBuffer attrs,
314 SilcAttribute attribute,
315 SilcAttributeFlags flags,
317 SilcUInt32 object_size)
319 object = silc_attribute_payload_encode_int(attribute, flags, object,
320 object_size, &object_size);
321 attrs = silc_attribute_payload_encode_data(attrs, attribute, flags,
322 (const unsigned char *)object,
328 /* Encoded the attribute data directly to buffer */
330 SilcBuffer silc_attribute_payload_encode_data(SilcBuffer attrs,
331 SilcAttribute attribute,
332 SilcAttributeFlags flags,
333 const unsigned char *data,
336 SilcBuffer buffer = attrs;
340 buffer = silc_buffer_realloc(buffer,
341 (buffer ? buffer->truelen + len : len));
344 silc_buffer_pull(buffer, buffer->len);
345 silc_buffer_pull_tail(buffer, len);
346 silc_buffer_format(buffer,
347 SILC_STR_UI_CHAR(attribute),
348 SILC_STR_UI_CHAR(flags),
349 SILC_STR_UI_SHORT((SilcUInt16)data_len),
350 SILC_STR_UI_XNSTRING(data, data_len),
352 silc_buffer_push(buffer, buffer->data - buffer->head);
357 /* Free Attribute Payload */
359 void silc_attribute_payload_free(SilcAttributePayload payload)
361 silc_free(payload->data);
365 /* Free's list of Attribute Payloads */
367 void silc_attribute_payload_list_free(SilcDList list)
369 SilcAttributePayload entry;
371 silc_dlist_start(list);
372 while ((entry = silc_dlist_get(list)) != SILC_LIST_END) {
373 silc_attribute_payload_free(entry);
374 silc_dlist_del(list, entry);
377 silc_dlist_uninit(list);
380 /* Return attribute type */
382 SilcAttribute silc_attribute_get_attribute(SilcAttributePayload payload)
384 return payload->attribute;
387 /* Return attribute flags */
389 SilcAttributeFlags silc_attribute_get_flags(SilcAttributePayload payload)
391 return payload->flags;
394 /* Return attribute data from the payload */
396 const unsigned char *silc_attribute_get_data(SilcAttributePayload payload,
397 SilcUInt32 *data_len)
400 *data_len = payload->data_len;
401 return (const unsigned char *)payload->data;
404 /* Construct digital signature verification data */
406 unsigned char *silc_attribute_get_verify_data(SilcDList attrs,
407 bool server_verification,
408 SilcUInt32 *data_len)
410 SilcAttributePayload attr;
411 SilcBufferStruct buffer;
412 unsigned char *data = NULL;
415 silc_dlist_start(attrs);
416 while ((attr = silc_dlist_get(attrs)) != SILC_LIST_END) {
417 switch (attr->attribute) {
418 case SILC_ATTRIBUTE_SERVER_DIGITAL_SIGNATURE:
419 /* Server signature is never part of the verification data */
422 case SILC_ATTRIBUTE_USER_DIGITAL_SIGNATURE:
423 /* For user signature verification this is not part of the data */
424 if (!server_verification)
427 /* Fallback, for server signature verification, user digital signature
428 is part of verification data. */
431 /* All other data is part of the verification data */
432 data = silc_realloc(data, sizeof(*data) * (4 + attr->data_len + len));
435 silc_buffer_set(&buffer, data + len, 4 + attr->data_len);
436 silc_buffer_format(&buffer,
437 SILC_STR_UI_CHAR(attr->attribute),
438 SILC_STR_UI_CHAR(attr->flags),
439 SILC_STR_UI_SHORT(attr->data_len),
440 SILC_STR_UI_XNSTRING(attr->data, attr->data_len),
442 len += 4 + attr->data_len;
453 /* Return parsed attribute object */
455 bool silc_attribute_get_object(SilcAttributePayload payload,
456 void *object, SilcUInt32 object_size)
461 if (!object || payload->flags & SILC_ATTRIBUTE_FLAG_INVALID)
464 switch (payload->attribute) {
465 case SILC_ATTRIBUTE_USER_INFO:
467 SilcVCard vcard = object;
468 if (object_size != sizeof(*vcard))
470 if (!silc_vcard_decode(payload->data, payload->data_len, vcard))
476 case SILC_ATTRIBUTE_SERVICE:
478 SilcAttributeObjService *service = object;
479 if (object_size != sizeof(*service))
481 if (payload->data_len < 7)
483 SILC_GET32_MSB(service->port, payload->data);
484 SILC_GET16_MSB(len, payload->data + 4);
485 if (payload->data_len < 7 + len)
487 memcpy(service->address, payload->data + 6,
488 (len < sizeof(service->address) - 1 ? len :
489 sizeof(service->address) - 1));
490 service->status = payload->data[6 + len] ? TRUE : FALSE;
495 case SILC_ATTRIBUTE_STATUS_MOOD:
496 case SILC_ATTRIBUTE_PREFERRED_CONTACT:
498 SilcUInt32 *mask = (SilcUInt32 *)object;
499 if (object_size != sizeof(SilcUInt32))
501 if (payload->data_len < 4)
503 SILC_GET32_MSB(*mask, payload->data);
508 case SILC_ATTRIBUTE_STATUS_FREETEXT:
509 case SILC_ATTRIBUTE_PREFERRED_LANGUAGE:
510 case SILC_ATTRIBUTE_TIMEZONE:
512 char *string = object;
513 if (payload->data_len < 2)
515 SILC_GET16_MSB(len, payload->data);
516 if (payload->data_len < 2 + len)
518 if (object_size < len)
520 memcpy(string, payload->data + 2, len);
525 case SILC_ATTRIBUTE_STATUS_MESSAGE:
526 case SILC_ATTRIBUTE_EXTENSION:
528 SilcAttributeObjMime *mime = object;
529 if (object_size != sizeof(*mime))
531 mime->mime = (const unsigned char *)payload->data;
532 mime->mime_len = payload->data_len;
537 case SILC_ATTRIBUTE_GEOLOCATION:
539 SilcAttributeObjGeo *geo = object;
540 SilcBufferStruct buffer;
542 if (object_size != sizeof(*geo))
544 silc_buffer_set(&buffer, (unsigned char *)payload->data,
546 res = silc_buffer_unformat(&buffer,
547 SILC_STR_UI16_STRING_ALLOC(&geo->longitude),
548 SILC_STR_UI16_STRING_ALLOC(&geo->latitude),
549 SILC_STR_UI16_STRING_ALLOC(&geo->altitude),
550 SILC_STR_UI16_STRING_ALLOC(&geo->accuracy),
558 case SILC_ATTRIBUTE_DEVICE_INFO:
560 SilcAttributeObjDevice *dev = object;
561 SilcBufferStruct buffer;
564 if (object_size != sizeof(*dev))
566 silc_buffer_set(&buffer, (unsigned char *)payload->data,
569 silc_buffer_unformat(&buffer,
570 SILC_STR_UI_INT(&type),
571 SILC_STR_UI16_STRING_ALLOC(&dev->manufacturer),
572 SILC_STR_UI16_STRING_ALLOC(&dev->version),
573 SILC_STR_UI16_STRING_ALLOC(&dev->model),
574 SILC_STR_UI16_STRING_ALLOC(&dev->language),
583 case SILC_ATTRIBUTE_USER_PUBLIC_KEY:
584 case SILC_ATTRIBUTE_SERVER_PUBLIC_KEY:
586 SilcAttributeObjPk *pk = object;
587 SilcBufferStruct buffer;
589 if (object_size != sizeof(*pk))
591 silc_buffer_set(&buffer, (unsigned char *)payload->data,
594 silc_buffer_unformat(&buffer,
595 SILC_STR_UI16_NSTRING_ALLOC(&pk->type, &len),
599 pk->data = silc_memdup(payload->data + 2 + len,
600 payload->data_len - 2 - len);
601 pk->data_len = payload->data_len - 2 - len;
606 case SILC_ATTRIBUTE_USER_DIGITAL_SIGNATURE:
607 case SILC_ATTRIBUTE_SERVER_DIGITAL_SIGNATURE:
609 SilcAttributeObjPk *pk = object;
610 if (object_size != sizeof(*pk))
613 pk->data = silc_memdup(payload->data, payload->data_len);
614 pk->data_len = payload->data_len;