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 int len1, len2, len3, len4;
130 if (object_size != sizeof(*geo))
132 len1 = (geo->longitude ? strlen(geo->longitude) : 0);
133 len2 = (geo->latitude ? strlen(geo->latitude) : 0);
134 len3 = (geo->altitude ? strlen(geo->altitude) : 0);
135 len4 = (geo->accuracy ? strlen(geo->accuracy) : 0);
136 if (len1 + len2 + len3 + len4 == 0)
138 len = len1 + len2 + len3 + len4;
139 tmpbuf = silc_buffer_alloc_size(8 + len);
142 silc_buffer_format(tmpbuf,
143 SILC_STR_UI_SHORT(len1),
144 SILC_STR_UI16_STRING(len1 ? geo->longitude : ""),
145 SILC_STR_UI_SHORT(len2),
146 SILC_STR_UI16_STRING(len ? geo->latitude : ""),
147 SILC_STR_UI_SHORT(len3),
148 SILC_STR_UI16_STRING(len3 ? geo->altitude : ""),
149 SILC_STR_UI_SHORT(len4),
150 SILC_STR_UI16_STRING(len4 ? geo->accuracy : ""),
152 object = tmpbuf->data;
153 object_size = tmpbuf->len;
157 case SILC_ATTRIBUTE_DEVICE_INFO:
159 SilcAttributeObjDevice *dev = object;
160 int len1, len2, len3, len4;
161 if (object_size != sizeof(*dev))
163 len1 = (dev->manufacturer ? strlen(dev->manufacturer) : 0);
164 len2 = (dev->version ? strlen(dev->version) : 0);
165 len3 = (dev->model ? strlen(dev->model) : 0);
166 len4 = (dev->language ? strlen(dev->language) : 0);
167 if (len1 + len2 + len3 + len4 == 0)
169 len = len1 + len2 + len3 + len4;
170 tmpbuf = silc_buffer_alloc_size(4 + 8 + len);
173 silc_buffer_format(tmpbuf,
174 SILC_STR_UI_INT(dev->type),
175 SILC_STR_UI_SHORT(len1),
176 SILC_STR_UI16_STRING(len ? dev->manufacturer : ""),
177 SILC_STR_UI_SHORT(len2),
178 SILC_STR_UI16_STRING(len ? dev->version : ""),
179 SILC_STR_UI_SHORT(len3),
180 SILC_STR_UI16_STRING(len3 ? dev->model : ""),
181 SILC_STR_UI_SHORT(len4),
182 SILC_STR_UI16_STRING(len4 ? dev->language : ""),
184 object = tmpbuf->data;
185 object_size = tmpbuf->len;
189 case SILC_ATTRIBUTE_USER_PUBLIC_KEY:
190 case SILC_ATTRIBUTE_SERVER_PUBLIC_KEY:
192 SilcAttributeObjPk *pk = object;
193 if (object_size != sizeof(*pk))
195 len = (pk->type ? strlen(pk->type) : 0);
196 tmpbuf = silc_buffer_alloc_size(2 + len + pk->data_len);
199 silc_buffer_format(tmpbuf,
200 SILC_STR_UI_SHORT(len),
201 SILC_STR_UI16_STRING(pk->type),
202 SILC_STR_UI_XNSTRING(pk->data, pk->data_len),
204 object = tmpbuf->data;
205 object_size = tmpbuf->len;
209 case SILC_ATTRIBUTE_USER_DIGITAL_SIGNATURE:
210 case SILC_ATTRIBUTE_SERVER_DIGITAL_SIGNATURE:
212 SilcAttributeObjPk *pk = object;
213 if (object_size != sizeof(*pk))
216 object_size = pk->data_len;
225 ret = silc_memdup(object, object_size);
228 silc_buffer_free(tmpbuf);
232 *ret_len = object_size;
240 /* Allocates attribute payload and encodes the attribute there */
242 SilcAttributePayload silc_attribute_payload_alloc(SilcAttribute attribute,
243 SilcAttributeFlags flags,
245 SilcUInt32 object_size)
247 SilcAttributePayload attr;
249 attr = silc_calloc(1, sizeof(*attr));
253 attr->attribute = attribute;
256 silc_attribute_payload_encode_int(attribute, flags, object,
258 (SilcUInt32 *)&attr->data_len);
267 /* Parse list of payloads */
269 SilcDList silc_attribute_payload_parse(const unsigned char *payload,
270 SilcUInt32 payload_len)
272 SilcBufferStruct buffer;
274 SilcAttributePayload newp;
277 SILC_LOG_DEBUG(("Parsing Attribute Payload list"));
279 silc_buffer_set(&buffer, (unsigned char *)payload, payload_len);
280 list = silc_dlist_init();
283 newp = silc_calloc(1, sizeof(*newp));
286 ret = silc_buffer_unformat(&buffer,
287 SILC_STR_UI_CHAR(&newp->attribute),
288 SILC_STR_UI_CHAR(&newp->flags),
289 SILC_STR_UI16_NSTRING_ALLOC(&newp->data,
295 if (newp->data_len > buffer.len) {
296 SILC_LOG_ERROR(("Incorrect attribute payload in list"));
300 len = 4 + newp->data_len;
301 if (buffer.len < len)
303 silc_buffer_pull(&buffer, len);
305 silc_dlist_add(list, newp);
311 silc_attribute_payload_list_free(list);
315 /* Encode one attribute payload to buffer */
317 SilcBuffer silc_attribute_payload_encode(SilcBuffer attrs,
318 SilcAttribute attribute,
319 SilcAttributeFlags flags,
321 SilcUInt32 object_size)
323 object = silc_attribute_payload_encode_int(attribute, flags, object,
324 object_size, &object_size);
325 attrs = silc_attribute_payload_encode_data(attrs, attribute, flags,
326 (const unsigned char *)object,
332 /* Encoded the attribute data directly to buffer */
334 SilcBuffer silc_attribute_payload_encode_data(SilcBuffer attrs,
335 SilcAttribute attribute,
336 SilcAttributeFlags flags,
337 const unsigned char *data,
340 SilcBuffer buffer = attrs;
344 buffer = silc_buffer_realloc(buffer,
345 (buffer ? buffer->truelen + len : len));
348 silc_buffer_pull(buffer, buffer->len);
349 silc_buffer_pull_tail(buffer, len);
350 silc_buffer_format(buffer,
351 SILC_STR_UI_CHAR(attribute),
352 SILC_STR_UI_CHAR(flags),
353 SILC_STR_UI_SHORT((SilcUInt16)data_len),
354 SILC_STR_UI_XNSTRING(data, data_len),
356 silc_buffer_push(buffer, buffer->data - buffer->head);
361 /* Free Attribute Payload */
363 void silc_attribute_payload_free(SilcAttributePayload payload)
365 silc_free(payload->data);
369 /* Free's list of Attribute Payloads */
371 void silc_attribute_payload_list_free(SilcDList list)
373 SilcAttributePayload entry;
375 silc_dlist_start(list);
376 while ((entry = silc_dlist_get(list)) != SILC_LIST_END) {
377 silc_attribute_payload_free(entry);
378 silc_dlist_del(list, entry);
381 silc_dlist_uninit(list);
384 /* Return attribute type */
386 SilcAttribute silc_attribute_get_attribute(SilcAttributePayload payload)
388 return payload->attribute;
391 /* Return attribute flags */
393 SilcAttributeFlags silc_attribute_get_flags(SilcAttributePayload payload)
395 return payload->flags;
398 /* Return attribute data from the payload */
400 const unsigned char *silc_attribute_get_data(SilcAttributePayload payload,
401 SilcUInt32 *data_len)
404 *data_len = payload->data_len;
405 return (const unsigned char *)payload->data;
408 /* Construct digital signature verification data */
410 unsigned char *silc_attribute_get_verify_data(SilcDList attrs,
411 bool server_verification,
412 SilcUInt32 *data_len)
414 SilcAttributePayload attr;
415 SilcBufferStruct buffer;
416 unsigned char *data = NULL;
419 silc_dlist_start(attrs);
420 while ((attr = silc_dlist_get(attrs)) != SILC_LIST_END) {
421 switch (attr->attribute) {
422 case SILC_ATTRIBUTE_SERVER_DIGITAL_SIGNATURE:
423 /* Server signature is never part of the verification data */
426 case SILC_ATTRIBUTE_USER_DIGITAL_SIGNATURE:
427 /* For user signature verification this is not part of the data */
428 if (!server_verification)
431 /* Fallback, for server signature verification, user digital signature
432 is part of verification data. */
435 /* All other data is part of the verification data */
436 data = silc_realloc(data, sizeof(*data) * (4 + attr->data_len + len));
439 silc_buffer_set(&buffer, data + len, 4 + attr->data_len);
440 silc_buffer_format(&buffer,
441 SILC_STR_UI_CHAR(attr->attribute),
442 SILC_STR_UI_CHAR(attr->flags),
443 SILC_STR_UI_SHORT(attr->data_len),
444 SILC_STR_UI_XNSTRING(attr->data, attr->data_len),
446 len += 4 + attr->data_len;
457 /* Return parsed attribute object */
459 bool silc_attribute_get_object(SilcAttributePayload payload,
460 void *object, SilcUInt32 object_size)
465 if (!object || payload->flags & SILC_ATTRIBUTE_FLAG_INVALID)
468 switch (payload->attribute) {
469 case SILC_ATTRIBUTE_USER_INFO:
471 SilcVCard vcard = object;
472 if (object_size != sizeof(*vcard))
474 if (!silc_vcard_decode(payload->data, payload->data_len, vcard))
480 case SILC_ATTRIBUTE_SERVICE:
482 SilcAttributeObjService *service = object;
483 if (object_size != sizeof(*service))
485 if (payload->data_len < 7)
487 SILC_GET32_MSB(service->port, payload->data);
488 SILC_GET16_MSB(len, payload->data + 4);
489 if (payload->data_len < 7 + len)
491 memcpy(service->address, payload->data + 6,
492 (len < sizeof(service->address) - 1 ? len :
493 sizeof(service->address) - 1));
494 service->status = payload->data[6 + len] ? TRUE : FALSE;
499 case SILC_ATTRIBUTE_STATUS_MOOD:
500 case SILC_ATTRIBUTE_PREFERRED_CONTACT:
502 SilcUInt32 *mask = (SilcUInt32 *)object;
503 if (object_size != sizeof(SilcUInt32))
505 if (payload->data_len < 4)
507 SILC_GET32_MSB(*mask, payload->data);
512 case SILC_ATTRIBUTE_STATUS_FREETEXT:
513 case SILC_ATTRIBUTE_PREFERRED_LANGUAGE:
514 case SILC_ATTRIBUTE_TIMEZONE:
516 char *string = object;
517 if (payload->data_len < 2)
519 SILC_GET16_MSB(len, payload->data);
520 if (payload->data_len < 2 + len)
522 if (object_size < len)
524 memcpy(string, payload->data + 2, len);
529 case SILC_ATTRIBUTE_STATUS_MESSAGE:
530 case SILC_ATTRIBUTE_EXTENSION:
532 SilcAttributeObjMime *mime = object;
533 if (object_size != sizeof(*mime))
535 mime->mime = (const unsigned char *)payload->data;
536 mime->mime_len = payload->data_len;
541 case SILC_ATTRIBUTE_GEOLOCATION:
543 SilcAttributeObjGeo *geo = object;
544 SilcBufferStruct buffer;
546 if (object_size != sizeof(*geo))
548 silc_buffer_set(&buffer, (unsigned char *)payload->data,
550 res = silc_buffer_unformat(&buffer,
551 SILC_STR_UI16_STRING_ALLOC(&geo->longitude),
552 SILC_STR_UI16_STRING_ALLOC(&geo->latitude),
553 SILC_STR_UI16_STRING_ALLOC(&geo->altitude),
554 SILC_STR_UI16_STRING_ALLOC(&geo->accuracy),
562 case SILC_ATTRIBUTE_DEVICE_INFO:
564 SilcAttributeObjDevice *dev = object;
565 SilcBufferStruct buffer;
568 if (object_size != sizeof(*dev))
570 silc_buffer_set(&buffer, (unsigned char *)payload->data,
573 silc_buffer_unformat(&buffer,
574 SILC_STR_UI_INT(&type),
575 SILC_STR_UI16_STRING_ALLOC(&dev->manufacturer),
576 SILC_STR_UI16_STRING_ALLOC(&dev->version),
577 SILC_STR_UI16_STRING_ALLOC(&dev->model),
578 SILC_STR_UI16_STRING_ALLOC(&dev->language),
587 case SILC_ATTRIBUTE_USER_PUBLIC_KEY:
588 case SILC_ATTRIBUTE_SERVER_PUBLIC_KEY:
590 SilcAttributeObjPk *pk = object;
591 SilcBufferStruct buffer;
593 if (object_size != sizeof(*pk))
595 silc_buffer_set(&buffer, (unsigned char *)payload->data,
598 silc_buffer_unformat(&buffer,
599 SILC_STR_UI16_NSTRING_ALLOC(&pk->type, &len),
603 pk->data = silc_memdup(payload->data + 2 + len,
604 payload->data_len - 2 - len);
605 pk->data_len = payload->data_len - 2 - len;
610 case SILC_ATTRIBUTE_USER_DIGITAL_SIGNATURE:
611 case SILC_ATTRIBUTE_SERVER_DIGITAL_SIGNATURE:
613 SilcAttributeObjPk *pk = object;
614 if (object_size != sizeof(*pk))
617 pk->data = silc_memdup(payload->data, payload->data_len);
618 pk->data_len = payload->data_len;