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c182393f MT |
1 | /* |
2 | libloc - A library to determine the location of someone on the Internet | |
3 | ||
4 | Copyright (C) 2017 IPFire Development Team <info@ipfire.org> | |
5 | ||
6 | This library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | This library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | */ | |
16 | ||
726f9984 | 17 | #include <assert.h> |
c182393f MT |
18 | #include <errno.h> |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
438db08c | 22 | #include <sys/queue.h> |
c182393f MT |
23 | #include <time.h> |
24 | ||
42f3ccd7 MT |
25 | #ifdef HAVE_ENDIAN_H |
26 | # include <endian.h> | |
27 | #endif | |
28 | ||
726f9984 MT |
29 | #include <openssl/bio.h> |
30 | #include <openssl/err.h> | |
31 | #include <openssl/evp.h> | |
32 | #include <openssl/pem.h> | |
33 | ||
9fc7f001 MT |
34 | #include <loc/libloc.h> |
35 | #include <loc/as.h> | |
42f3ccd7 | 36 | #include <loc/compat.h> |
ec684c1a | 37 | #include <loc/country.h> |
726f9984 | 38 | #include <loc/database.h> |
c182393f | 39 | #include <loc/format.h> |
3b5f4af2 | 40 | #include <loc/network.h> |
9fc7f001 | 41 | #include <loc/private.h> |
c182393f MT |
42 | #include <loc/writer.h> |
43 | ||
c182393f MT |
44 | struct loc_writer { |
45 | struct loc_ctx* ctx; | |
46 | int refcount; | |
47 | ||
48 | struct loc_stringpool* pool; | |
49 | off_t vendor; | |
50 | off_t description; | |
4bf49d00 | 51 | off_t license; |
c182393f | 52 | |
5ce881d4 MT |
53 | // Private keys to sign any databases |
54 | EVP_PKEY* private_key1; | |
55 | EVP_PKEY* private_key2; | |
56 | ||
57 | // Signatures | |
58 | char signature1[LOC_SIGNATURE_MAX_LENGTH]; | |
59 | size_t signature1_length; | |
60 | char signature2[LOC_SIGNATURE_MAX_LENGTH]; | |
61 | size_t signature2_length; | |
726f9984 | 62 | |
c182393f MT |
63 | struct loc_as** as; |
64 | size_t as_count; | |
3b5f4af2 | 65 | |
ec684c1a MT |
66 | struct loc_country** countries; |
67 | size_t countries_count; | |
68 | ||
3b5f4af2 | 69 | struct loc_network_tree* networks; |
c182393f MT |
70 | }; |
71 | ||
5ce881d4 | 72 | static int parse_private_key(struct loc_writer* writer, EVP_PKEY** private_key, FILE* f) { |
726f9984 | 73 | // Free any previously loaded keys |
5ce881d4 MT |
74 | if (*private_key) |
75 | EVP_PKEY_free(*private_key); | |
726f9984 MT |
76 | |
77 | // Read the key | |
5ce881d4 | 78 | *private_key = PEM_read_PrivateKey(f, NULL, NULL, NULL); |
726f9984 MT |
79 | |
80 | // Log any errors | |
5ce881d4 | 81 | if (!*private_key) { |
726f9984 MT |
82 | char* error = ERR_error_string(ERR_get_error(), NULL); |
83 | ERROR(writer->ctx, "Could not parse private key: %s\n", error); | |
84 | ||
85 | return -1; | |
86 | } | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
5ce881d4 MT |
91 | LOC_EXPORT int loc_writer_new(struct loc_ctx* ctx, struct loc_writer** writer, |
92 | FILE* fkey1, FILE* fkey2) { | |
c182393f MT |
93 | struct loc_writer* w = calloc(1, sizeof(*w)); |
94 | if (!w) | |
95 | return -ENOMEM; | |
96 | ||
97 | w->ctx = loc_ref(ctx); | |
98 | w->refcount = 1; | |
99 | ||
0e974d4b | 100 | int r = loc_stringpool_new(ctx, &w->pool); |
c182393f MT |
101 | if (r) { |
102 | loc_writer_unref(w); | |
103 | return r; | |
104 | } | |
105 | ||
3b5f4af2 MT |
106 | // Initialize the network tree |
107 | r = loc_network_tree_new(ctx, &w->networks); | |
108 | if (r) { | |
109 | loc_writer_unref(w); | |
110 | return r; | |
111 | } | |
112 | ||
5ce881d4 MT |
113 | // Load the private keys to sign databases |
114 | if (fkey1) { | |
115 | r = parse_private_key(w, &w->private_key1, fkey1); | |
116 | if (r) { | |
117 | loc_writer_unref(w); | |
118 | return r; | |
119 | } | |
120 | } | |
121 | ||
122 | if (fkey2) { | |
123 | r = parse_private_key(w, &w->private_key2, fkey2); | |
726f9984 MT |
124 | if (r) { |
125 | loc_writer_unref(w); | |
126 | return r; | |
127 | } | |
128 | } | |
129 | ||
c182393f MT |
130 | *writer = w; |
131 | return 0; | |
132 | } | |
133 | ||
134 | LOC_EXPORT struct loc_writer* loc_writer_ref(struct loc_writer* writer) { | |
135 | writer->refcount++; | |
136 | ||
137 | return writer; | |
138 | } | |
139 | ||
140 | static void loc_writer_free(struct loc_writer* writer) { | |
141 | DEBUG(writer->ctx, "Releasing writer at %p\n", writer); | |
142 | ||
5ce881d4 MT |
143 | // Free private keys |
144 | if (writer->private_key1) | |
145 | EVP_PKEY_free(writer->private_key1); | |
146 | if (writer->private_key2) | |
147 | EVP_PKEY_free(writer->private_key2); | |
726f9984 | 148 | |
c182393f | 149 | // Unref all AS |
d226ad2d MT |
150 | if (writer->as) { |
151 | for (unsigned int i = 0; i < writer->as_count; i++) { | |
152 | loc_as_unref(writer->as[i]); | |
153 | } | |
154 | free(writer->as); | |
c182393f MT |
155 | } |
156 | ||
3b5f4af2 MT |
157 | // Release network tree |
158 | if (writer->networks) | |
159 | loc_network_tree_unref(writer->networks); | |
160 | ||
c182393f MT |
161 | // Unref the string pool |
162 | loc_stringpool_unref(writer->pool); | |
163 | ||
164 | loc_unref(writer->ctx); | |
165 | free(writer); | |
166 | } | |
167 | ||
168 | LOC_EXPORT struct loc_writer* loc_writer_unref(struct loc_writer* writer) { | |
169 | if (--writer->refcount > 0) | |
170 | return writer; | |
171 | ||
172 | loc_writer_free(writer); | |
173 | ||
174 | return NULL; | |
175 | } | |
176 | ||
177 | LOC_EXPORT const char* loc_writer_get_vendor(struct loc_writer* writer) { | |
178 | return loc_stringpool_get(writer->pool, writer->vendor); | |
179 | } | |
180 | ||
181 | LOC_EXPORT int loc_writer_set_vendor(struct loc_writer* writer, const char* vendor) { | |
182 | // Add the string to the string pool | |
183 | off_t offset = loc_stringpool_add(writer->pool, vendor); | |
184 | if (offset < 0) | |
185 | return offset; | |
186 | ||
187 | writer->vendor = offset; | |
188 | return 0; | |
189 | } | |
190 | ||
191 | LOC_EXPORT const char* loc_writer_get_description(struct loc_writer* writer) { | |
192 | return loc_stringpool_get(writer->pool, writer->description); | |
193 | } | |
194 | ||
195 | LOC_EXPORT int loc_writer_set_description(struct loc_writer* writer, const char* description) { | |
196 | // Add the string to the string pool | |
197 | off_t offset = loc_stringpool_add(writer->pool, description); | |
198 | if (offset < 0) | |
199 | return offset; | |
200 | ||
201 | writer->description = offset; | |
202 | return 0; | |
203 | } | |
204 | ||
4bf49d00 MT |
205 | LOC_EXPORT const char* loc_writer_get_license(struct loc_writer* writer) { |
206 | return loc_stringpool_get(writer->pool, writer->license); | |
207 | } | |
208 | ||
209 | LOC_EXPORT int loc_writer_set_license(struct loc_writer* writer, const char* license) { | |
210 | // Add the string to the string pool | |
211 | off_t offset = loc_stringpool_add(writer->pool, license); | |
212 | if (offset < 0) | |
213 | return offset; | |
214 | ||
215 | writer->license = offset; | |
216 | return 0; | |
217 | } | |
218 | ||
c182393f MT |
219 | static int __loc_as_cmp(const void* as1, const void* as2) { |
220 | return loc_as_cmp(*(struct loc_as**)as1, *(struct loc_as**)as2); | |
221 | } | |
222 | ||
223 | LOC_EXPORT int loc_writer_add_as(struct loc_writer* writer, struct loc_as** as, uint32_t number) { | |
29bd8211 | 224 | int r = loc_as_new(writer->ctx, as, number); |
c182393f MT |
225 | if (r) |
226 | return r; | |
227 | ||
228 | // We have a new AS to add | |
229 | writer->as_count++; | |
230 | ||
231 | // Make space | |
232 | writer->as = realloc(writer->as, sizeof(*writer->as) * writer->as_count); | |
233 | if (!writer->as) | |
234 | return -ENOMEM; | |
235 | ||
236 | // Add as last element | |
237 | writer->as[writer->as_count - 1] = loc_as_ref(*as); | |
238 | ||
239 | // Sort everything | |
240 | qsort(writer->as, writer->as_count, sizeof(*writer->as), __loc_as_cmp); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
3b5f4af2 MT |
245 | LOC_EXPORT int loc_writer_add_network(struct loc_writer* writer, struct loc_network** network, const char* string) { |
246 | int r; | |
247 | ||
248 | // Create a new network object | |
249 | r = loc_network_new_from_string(writer->ctx, network, string); | |
250 | if (r) | |
251 | return r; | |
252 | ||
253 | // Add it to the local tree | |
254 | return loc_network_tree_add_network(writer->networks, *network); | |
255 | } | |
256 | ||
ec684c1a MT |
257 | static int __loc_country_cmp(const void* country1, const void* country2) { |
258 | return loc_country_cmp(*(struct loc_country**)country1, *(struct loc_country**)country2); | |
259 | } | |
260 | ||
261 | LOC_EXPORT int loc_writer_add_country(struct loc_writer* writer, struct loc_country** country, const char* country_code) { | |
262 | int r = loc_country_new(writer->ctx, country, country_code); | |
263 | if (r) | |
264 | return r; | |
265 | ||
266 | // We have a new country to add | |
267 | writer->countries_count++; | |
268 | ||
269 | // Make space | |
270 | writer->countries = realloc(writer->countries, sizeof(*writer->countries) * writer->countries_count); | |
271 | if (!writer->countries) | |
272 | return -ENOMEM; | |
273 | ||
274 | // Add as last element | |
275 | writer->countries[writer->countries_count - 1] = loc_country_ref(*country); | |
276 | ||
277 | // Sort everything | |
278 | qsort(writer->countries, writer->countries_count, sizeof(*writer->countries), __loc_country_cmp); | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
22c7b98b MT |
283 | static void make_magic(struct loc_writer* writer, struct loc_database_magic* magic, |
284 | enum loc_database_version version) { | |
c182393f MT |
285 | // Copy magic bytes |
286 | for (unsigned int i = 0; i < strlen(LOC_DATABASE_MAGIC); i++) | |
287 | magic->magic[i] = LOC_DATABASE_MAGIC[i]; | |
288 | ||
289 | // Set version | |
22c7b98b | 290 | magic->version = version; |
c182393f MT |
291 | } |
292 | ||
293 | static void align_page_boundary(off_t* offset, FILE* f) { | |
294 | // Move to next page boundary | |
295 | while (*offset % LOC_DATABASE_PAGE_SIZE > 0) | |
296 | *offset += fwrite("", 1, 1, f); | |
297 | } | |
298 | ||
299 | static int loc_database_write_pool(struct loc_writer* writer, | |
b904896a | 300 | struct loc_database_header_v1* header, off_t* offset, FILE* f) { |
c182393f | 301 | // Save the offset of the pool section |
5c57de03 | 302 | DEBUG(writer->ctx, "Pool starts at %jd bytes\n", (intmax_t)*offset); |
0676cd80 | 303 | header->pool_offset = htobe32(*offset); |
c182393f MT |
304 | |
305 | // Write the pool | |
306 | size_t pool_length = loc_stringpool_write(writer->pool, f); | |
307 | *offset += pool_length; | |
308 | ||
309 | DEBUG(writer->ctx, "Pool has a length of %zu bytes\n", pool_length); | |
0676cd80 | 310 | header->pool_length = htobe32(pool_length); |
c182393f MT |
311 | |
312 | return 0; | |
313 | } | |
314 | ||
315 | static int loc_database_write_as_section(struct loc_writer* writer, | |
b904896a | 316 | struct loc_database_header_v1* header, off_t* offset, FILE* f) { |
5c57de03 | 317 | DEBUG(writer->ctx, "AS section starts at %jd bytes\n", (intmax_t)*offset); |
0676cd80 | 318 | header->as_offset = htobe32(*offset); |
c182393f MT |
319 | |
320 | size_t as_length = 0; | |
321 | ||
b904896a | 322 | struct loc_database_as_v1 as; |
c182393f MT |
323 | for (unsigned int i = 0; i < writer->as_count; i++) { |
324 | // Convert AS into database format | |
b904896a | 325 | loc_as_to_database_v1(writer->as[i], writer->pool, &as); |
c182393f MT |
326 | |
327 | // Write to disk | |
65862405 | 328 | *offset += fwrite(&as, 1, sizeof(as), f); |
c182393f MT |
329 | as_length += sizeof(as); |
330 | } | |
331 | ||
332 | DEBUG(writer->ctx, "AS section has a length of %zu bytes\n", as_length); | |
0676cd80 | 333 | header->as_length = htobe32(as_length); |
c182393f | 334 | |
fda89f24 MT |
335 | align_page_boundary(offset, f); |
336 | ||
c182393f MT |
337 | return 0; |
338 | } | |
339 | ||
438db08c MT |
340 | struct node { |
341 | TAILQ_ENTRY(node) nodes; | |
f3e02bc5 | 342 | |
438db08c | 343 | struct loc_network_tree_node* node; |
f3e02bc5 | 344 | |
438db08c MT |
345 | // Indices of the child nodes |
346 | uint32_t index_zero; | |
347 | uint32_t index_one; | |
348 | }; | |
f3e02bc5 | 349 | |
438db08c MT |
350 | static struct node* make_node(struct loc_network_tree_node* node) { |
351 | struct node* n = malloc(sizeof(*n)); | |
352 | if (!n) | |
353 | return NULL; | |
f3e02bc5 | 354 | |
438db08c MT |
355 | n->node = loc_network_tree_node_ref(node); |
356 | n->index_zero = n->index_one = 0; | |
357 | ||
358 | return n; | |
359 | } | |
360 | ||
361 | static void free_node(struct node* node) { | |
362 | loc_network_tree_node_unref(node->node); | |
363 | ||
364 | free(node); | |
365 | } | |
366 | ||
367 | struct network { | |
368 | TAILQ_ENTRY(network) networks; | |
369 | ||
370 | struct loc_network* network; | |
371 | }; | |
372 | ||
373 | static struct network* make_network(struct loc_network* network) { | |
374 | struct network* n = malloc(sizeof(*n)); | |
375 | if (!n) | |
376 | return NULL; | |
377 | ||
378 | n->network = loc_network_ref(network); | |
379 | ||
380 | return n; | |
f3e02bc5 MT |
381 | } |
382 | ||
438db08c MT |
383 | static void free_network(struct network* network) { |
384 | loc_network_unref(network->network); | |
385 | ||
386 | free(network); | |
387 | } | |
388 | ||
389 | static int loc_database_write_networks(struct loc_writer* writer, | |
b904896a | 390 | struct loc_database_header_v1* header, off_t* offset, FILE* f) { |
438db08c | 391 | // Write the network tree |
5c57de03 | 392 | DEBUG(writer->ctx, "Network tree starts at %jd bytes\n", (intmax_t)*offset); |
438db08c | 393 | header->network_tree_offset = htobe32(*offset); |
f3e02bc5 | 394 | |
438db08c MT |
395 | size_t network_tree_length = 0; |
396 | size_t network_data_length = 0; | |
f3e02bc5 | 397 | |
438db08c MT |
398 | struct node* node; |
399 | struct node* child_node; | |
400 | ||
401 | uint32_t index = 0; | |
402 | uint32_t network_index = 0; | |
403 | ||
b904896a MT |
404 | struct loc_database_network_v1 db_network; |
405 | struct loc_database_network_node_v1 db_node; | |
438db08c MT |
406 | |
407 | // Initialize queue for nodes | |
408 | TAILQ_HEAD(node_t, node) nodes; | |
409 | TAILQ_INIT(&nodes); | |
410 | ||
411 | // Initialize queue for networks | |
412 | TAILQ_HEAD(network_t, network) networks; | |
413 | TAILQ_INIT(&networks); | |
414 | ||
415 | // Add root | |
416 | struct loc_network_tree_node* root = loc_network_tree_get_root(writer->networks); | |
417 | node = make_node(root); | |
418 | ||
419 | TAILQ_INSERT_TAIL(&nodes, node, nodes); | |
420 | ||
421 | while (!TAILQ_EMPTY(&nodes)) { | |
422 | // Pop first node in list | |
423 | node = TAILQ_FIRST(&nodes); | |
424 | TAILQ_REMOVE(&nodes, node, nodes); | |
425 | ||
426 | DEBUG(writer->ctx, "Processing node %p\n", node); | |
427 | ||
428 | // Get child nodes | |
429 | struct loc_network_tree_node* node_zero = loc_network_tree_node_get(node->node, 0); | |
430 | if (node_zero) { | |
431 | node->index_zero = ++index; | |
432 | ||
433 | child_node = make_node(node_zero); | |
434 | loc_network_tree_node_unref(node_zero); | |
435 | ||
436 | TAILQ_INSERT_TAIL(&nodes, child_node, nodes); | |
437 | } | |
438 | ||
439 | struct loc_network_tree_node* node_one = loc_network_tree_node_get(node->node, 1); | |
440 | if (node_one) { | |
441 | node->index_one = ++index; | |
442 | ||
443 | child_node = make_node(node_one); | |
444 | loc_network_tree_node_unref(node_one); | |
445 | ||
446 | TAILQ_INSERT_TAIL(&nodes, child_node, nodes); | |
447 | } | |
448 | ||
449 | // Prepare what we are writing to disk | |
39a55353 MT |
450 | db_node.zero = htobe32(node->index_zero); |
451 | db_node.one = htobe32(node->index_one); | |
452 | ||
438db08c MT |
453 | if (loc_network_tree_node_is_leaf(node->node)) { |
454 | struct loc_network* network = loc_network_tree_node_get_network(node->node); | |
455 | ||
456 | // Append network to be written out later | |
457 | struct network* nw = make_network(network); | |
458 | TAILQ_INSERT_TAIL(&networks, nw, networks); | |
459 | ||
39a55353 | 460 | db_node.network = htobe32(network_index++); |
438db08c MT |
461 | loc_network_unref(network); |
462 | } else { | |
39a55353 | 463 | db_node.network = htobe32(0xffffffff); |
438db08c MT |
464 | } |
465 | ||
466 | // Write the current node | |
467 | DEBUG(writer->ctx, "Writing node %p (0 = %d, 1 = %d)\n", | |
468 | node, node->index_zero, node->index_one); | |
469 | ||
470 | *offset += fwrite(&db_node, 1, sizeof(db_node), f); | |
471 | network_tree_length += sizeof(db_node); | |
472 | ||
473 | free_node(node); | |
474 | } | |
475 | ||
476 | loc_network_tree_node_unref(root); | |
477 | ||
478 | header->network_tree_length = htobe32(network_tree_length); | |
479 | ||
480 | align_page_boundary(offset, f); | |
481 | ||
5c57de03 | 482 | DEBUG(writer->ctx, "Networks data section starts at %jd bytes\n", (intmax_t)*offset); |
438db08c MT |
483 | header->network_data_offset = htobe32(*offset); |
484 | ||
485 | // We have now written the entire tree and have all networks | |
486 | // in a queue in order as they are indexed | |
487 | while (!TAILQ_EMPTY(&networks)) { | |
488 | struct network* nw = TAILQ_FIRST(&networks); | |
489 | TAILQ_REMOVE(&networks, nw, networks); | |
490 | ||
491 | // Prepare what we are writing to disk | |
b904896a | 492 | int r = loc_network_to_database_v1(nw->network, &db_network); |
438db08c MT |
493 | if (r) |
494 | return r; | |
495 | ||
496 | *offset += fwrite(&db_network, 1, sizeof(db_network), f); | |
497 | network_data_length += sizeof(db_network); | |
498 | ||
499 | free_network(nw); | |
500 | } | |
f3e02bc5 | 501 | |
438db08c | 502 | header->network_data_length = htobe32(network_data_length); |
f3e02bc5 | 503 | |
fda89f24 MT |
504 | align_page_boundary(offset, f); |
505 | ||
f3e02bc5 MT |
506 | return 0; |
507 | } | |
508 | ||
ec684c1a | 509 | static int loc_database_write_countries(struct loc_writer* writer, |
b904896a | 510 | struct loc_database_header_v1* header, off_t* offset, FILE* f) { |
2e2325a9 | 511 | DEBUG(writer->ctx, "Countries section starts at %jd bytes\n", (intmax_t)*offset); |
ec684c1a MT |
512 | header->countries_offset = htobe32(*offset); |
513 | ||
514 | size_t countries_length = 0; | |
515 | ||
b904896a | 516 | struct loc_database_country_v1 country; |
ec684c1a MT |
517 | for (unsigned int i = 0; i < writer->countries_count; i++) { |
518 | // Convert country into database format | |
b904896a | 519 | loc_country_to_database_v1(writer->countries[i], writer->pool, &country); |
ec684c1a MT |
520 | |
521 | // Write to disk | |
522 | *offset += fwrite(&country, 1, sizeof(country), f); | |
523 | countries_length += sizeof(country); | |
524 | } | |
525 | ||
526 | DEBUG(writer->ctx, "Countries section has a length of %zu bytes\n", countries_length); | |
527 | header->countries_length = htobe32(countries_length); | |
528 | ||
529 | align_page_boundary(offset, f); | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
726f9984 | 534 | static int loc_writer_create_signature(struct loc_writer* writer, |
5ce881d4 MT |
535 | struct loc_database_header_v1* header, FILE* f, EVP_PKEY* private_key, |
536 | char* signature, size_t* length) { | |
c7db968a | 537 | DEBUG(writer->ctx, "Creating signature...\n"); |
726f9984 MT |
538 | |
539 | // Read file from the beginning | |
540 | rewind(f); | |
541 | ||
542 | // Create a new context for signing | |
543 | EVP_MD_CTX* mdctx = EVP_MD_CTX_new(); | |
544 | ||
545 | // Initialise the context | |
5ce881d4 | 546 | int r = EVP_DigestSignInit(mdctx, NULL, NULL, NULL, private_key); |
726f9984 MT |
547 | if (r != 1) { |
548 | ERROR(writer->ctx, "%s\n", ERR_error_string(ERR_get_error(), NULL)); | |
549 | goto END; | |
550 | } | |
551 | ||
552 | // Read magic | |
553 | struct loc_database_magic magic; | |
554 | fread(&magic, 1, sizeof(magic), f); | |
555 | ||
a0cff45d MT |
556 | hexdump(writer->ctx, &magic, sizeof(magic)); |
557 | ||
726f9984 MT |
558 | // Feed magic into the signature |
559 | r = EVP_DigestSignUpdate(mdctx, &magic, sizeof(magic)); | |
560 | if (r != 1) { | |
561 | ERROR(writer->ctx, "%s\n", ERR_error_string(ERR_get_error(), NULL)); | |
562 | goto END; | |
563 | } | |
564 | ||
a0cff45d MT |
565 | hexdump(writer->ctx, header, sizeof(*header)); |
566 | ||
726f9984 | 567 | // Feed the header into the signature |
72633a85 | 568 | r = EVP_DigestSignUpdate(mdctx, header, sizeof(*header)); |
726f9984 MT |
569 | if (r != 1) { |
570 | ERROR(writer->ctx, "%s\n", ERR_error_string(ERR_get_error(), NULL)); | |
571 | goto END; | |
572 | } | |
573 | ||
574 | // Skip header | |
72633a85 | 575 | fseek(f, sizeof(*header), SEEK_CUR); |
726f9984 MT |
576 | |
577 | // Walk through the file in chunks of 64kB | |
578 | char buffer[64 * 1024]; | |
579 | while (!feof(f)) { | |
580 | size_t bytes_read = fread(buffer, 1, sizeof(buffer), f); | |
581 | ||
582 | if (ferror(f)) { | |
583 | ERROR(writer->ctx, "Error reading from file: %s\n", strerror(errno)); | |
584 | r = errno; | |
585 | goto END; | |
586 | } | |
587 | ||
a0cff45d MT |
588 | hexdump(writer->ctx, buffer, bytes_read); |
589 | ||
726f9984 MT |
590 | r = EVP_DigestSignUpdate(mdctx, buffer, bytes_read); |
591 | if (r != 1) { | |
592 | ERROR(writer->ctx, "%s\n", ERR_error_string(ERR_get_error(), NULL)); | |
5ce881d4 | 593 | r = -1; |
726f9984 MT |
594 | goto END; |
595 | } | |
596 | } | |
597 | ||
598 | // Compute the signature | |
726f9984 | 599 | r = EVP_DigestSignFinal(mdctx, |
5ce881d4 | 600 | (unsigned char*)signature, length); |
726f9984 MT |
601 | if (r != 1) { |
602 | ERROR(writer->ctx, "%s\n", ERR_error_string(ERR_get_error(), NULL)); | |
5ce881d4 | 603 | r = -1; |
726f9984 MT |
604 | goto END; |
605 | } | |
606 | ||
5ce881d4 | 607 | DEBUG(writer->ctx, "Successfully generated signature of %lu bytes\n", *length); |
726f9984 MT |
608 | r = 0; |
609 | ||
257626f5 | 610 | // Dump signature |
5ce881d4 | 611 | hexdump(writer->ctx, signature, *length); |
257626f5 | 612 | |
726f9984 MT |
613 | END: |
614 | EVP_MD_CTX_free(mdctx); | |
615 | ||
616 | return r; | |
617 | } | |
618 | ||
22c7b98b MT |
619 | LOC_EXPORT int loc_writer_write(struct loc_writer* writer, FILE* f, enum loc_database_version version) { |
620 | // Check version | |
621 | switch (version) { | |
622 | case LOC_DATABASE_VERSION_UNSET: | |
623 | version = LOC_DATABASE_VERSION_LATEST; | |
624 | break; | |
625 | ||
626 | case LOC_DATABASE_VERSION_1: | |
627 | break; | |
628 | ||
629 | default: | |
630 | ERROR(writer->ctx, "Invalid database version: %d\n", version); | |
631 | return -1; | |
632 | } | |
633 | ||
634 | DEBUG(writer->ctx, "Writing database in version %d\n", version); | |
635 | ||
c182393f | 636 | struct loc_database_magic magic; |
22c7b98b | 637 | make_magic(writer, &magic, version); |
c182393f MT |
638 | |
639 | // Make the header | |
b904896a | 640 | struct loc_database_header_v1 header; |
0676cd80 MT |
641 | header.vendor = htobe32(writer->vendor); |
642 | header.description = htobe32(writer->description); | |
4bf49d00 | 643 | header.license = htobe32(writer->license); |
c182393f MT |
644 | |
645 | time_t now = time(NULL); | |
646 | header.created_at = htobe64(now); | |
647 | ||
5ce881d4 MT |
648 | // Clear the signatures |
649 | memset(header.signature1, '\0', sizeof(header.signature1)); | |
650 | header.signature1_length = 0; | |
651 | memset(header.signature2, '\0', sizeof(header.signature2)); | |
652 | header.signature2_length = 0; | |
b1720435 | 653 | |
5e164830 | 654 | // Clear the padding |
c7db968a | 655 | memset(header.padding, '\0', sizeof(header.padding)); |
5e164830 | 656 | |
c182393f MT |
657 | int r; |
658 | off_t offset = 0; | |
659 | ||
660 | // Start writing at the beginning of the file | |
661 | r = fseek(f, 0, SEEK_SET); | |
662 | if (r) | |
663 | return r; | |
664 | ||
665 | // Write the magic | |
666 | offset += fwrite(&magic, 1, sizeof(magic), f); | |
667 | ||
668 | // Skip the space we need to write the header later | |
669 | r = fseek(f, sizeof(header), SEEK_CUR); | |
670 | if (r) { | |
671 | DEBUG(writer->ctx, "Could not seek to position after header\n"); | |
672 | return r; | |
673 | } | |
674 | offset += sizeof(header); | |
675 | ||
676 | align_page_boundary(&offset, f); | |
677 | ||
678 | // Write all ASes | |
679 | r = loc_database_write_as_section(writer, &header, &offset, f); | |
680 | if (r) | |
681 | return r; | |
682 | ||
f3e02bc5 | 683 | // Write all networks |
438db08c | 684 | r = loc_database_write_networks(writer, &header, &offset, f); |
f3e02bc5 MT |
685 | if (r) |
686 | return r; | |
687 | ||
47bea941 MT |
688 | // Write countries |
689 | r = loc_database_write_countries(writer, &header, &offset, f); | |
c182393f MT |
690 | if (r) |
691 | return r; | |
692 | ||
47bea941 MT |
693 | // Write pool |
694 | r = loc_database_write_pool(writer, &header, &offset, f); | |
ec684c1a MT |
695 | if (r) |
696 | return r; | |
697 | ||
5ce881d4 MT |
698 | // Create the signatures |
699 | if (writer->private_key1) { | |
700 | DEBUG(writer->ctx, "Creating signature with first private key\n"); | |
701 | ||
702 | writer->signature1_length = sizeof(writer->signature1); | |
703 | ||
704 | r = loc_writer_create_signature(writer, &header, f, | |
705 | writer->private_key1, writer->signature1, &writer->signature1_length); | |
726f9984 MT |
706 | if (r) |
707 | return r; | |
708 | } | |
709 | ||
5ce881d4 MT |
710 | if (writer->private_key2) { |
711 | DEBUG(writer->ctx, "Creating signature with second private key\n"); | |
712 | ||
713 | writer->signature2_length = sizeof(writer->signature2); | |
714 | ||
715 | r = loc_writer_create_signature(writer, &header, f, | |
716 | writer->private_key2, writer->signature2, &writer->signature2_length); | |
717 | if (r) | |
718 | return r; | |
719 | } | |
720 | ||
721 | // Copy the signatures into the header | |
722 | if (writer->signature1_length) { | |
c7db968a MT |
723 | DEBUG(writer->ctx, "Copying first signature of %zu byte(s)\n", |
724 | writer->signature1_length); | |
725 | ||
5ce881d4 | 726 | memcpy(header.signature1, writer->signature1, writer->signature1_length); |
c7db968a | 727 | header.signature1_length = htobe16(writer->signature1_length); |
5ce881d4 MT |
728 | } |
729 | ||
730 | if (writer->signature2_length) { | |
c7db968a MT |
731 | DEBUG(writer->ctx, "Copying second signature of %zu byte(s)\n", |
732 | writer->signature1_length); | |
733 | ||
5ce881d4 | 734 | memcpy(header.signature2, writer->signature2, writer->signature2_length); |
c7db968a | 735 | header.signature2_length = htobe16(writer->signature2_length); |
5ce881d4 MT |
736 | } |
737 | ||
c182393f MT |
738 | // Write the header |
739 | r = fseek(f, sizeof(magic), SEEK_SET); | |
740 | if (r) | |
741 | return r; | |
742 | ||
726f9984 | 743 | fwrite(&header, 1, sizeof(header), f); |
c182393f | 744 | |
726f9984 | 745 | return r; |
c182393f | 746 | } |