Alexandre Lision | e24852d | 2014-02-04 13:13:02 -0500 | [diff] [blame] | 1 | /* |
| 2 | Copyright (C) 2006-2008 Werner Dittmann |
| 3 | |
| 4 | This program is free software: you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License as published by |
| 6 | the Free Software Foundation, either version 3 of the License, or |
| 7 | (at your option) any later version. |
| 8 | |
| 9 | This program is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | GNU General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License |
| 15 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | /* |
| 19 | * Authors: Werner Dittmann <Werner.Dittmann@t-online.de> |
| 20 | */ |
| 21 | // #define UNIT_TEST |
| 22 | |
| 23 | #include <string> |
| 24 | #include <time.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <unistd.h> |
| 27 | |
| 28 | #include <libzrtpcpp/ZIDFile.h> |
| 29 | |
| 30 | |
| 31 | static ZIDFile* instance; |
| 32 | static int errors = 0; // maybe we will use as member of ZIDFile later... |
| 33 | |
| 34 | void ZIDFile::createZIDFile(char* name) { |
| 35 | zidFile = fopen(name, "wb+"); |
| 36 | // New file, generate an associated random ZID and save |
| 37 | // it as first record |
| 38 | if (zidFile != NULL) { |
| 39 | unsigned int* ip; |
| 40 | ip = (unsigned int*) associatedZid; |
| 41 | srand(time(NULL)); |
| 42 | *ip++ = rand(); |
| 43 | *ip++ = rand(); |
| 44 | *ip = rand(); |
| 45 | |
| 46 | ZIDRecord rec(associatedZid); |
| 47 | rec.setOwnZIDRecord(); |
| 48 | fseek(zidFile, 0L, SEEK_SET); |
| 49 | if (fwrite(rec.getRecordData(), rec.getRecordLength(), 1, zidFile) < 1) |
| 50 | ++errors; |
| 51 | fflush(zidFile); |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Migrate old ZID file format to new one. |
| 57 | * |
| 58 | * If ZID file is old format: |
| 59 | * - close it, rename it, then re-open |
| 60 | * - create ZID file for new format |
| 61 | * - copy over contents and flags. |
| 62 | */ |
| 63 | void ZIDFile::checkDoMigration(char* name) { |
| 64 | FILE* fdOld; |
| 65 | unsigned char inb[2]; |
| 66 | zidrecord1_t recOld; |
| 67 | |
| 68 | fseek(zidFile, 0L, SEEK_SET); |
| 69 | if (fread(inb, 2, 1, zidFile) < 1) { |
| 70 | ++errors; |
| 71 | inb[0] = 0; |
| 72 | } |
| 73 | |
| 74 | if (inb[0] > 0) { // if it's new format just return |
| 75 | return; |
| 76 | } |
| 77 | fclose(zidFile); // close old ZID file |
| 78 | zidFile = NULL; |
| 79 | |
| 80 | // create save file name, rename and re-open |
| 81 | // if rename fails, just unlink old ZID file and create a brand new file |
| 82 | // just a little inconvenience for the user, need to verify new SAS |
| 83 | std::string fn = std::string(name) + std::string(".save"); |
| 84 | if (rename(name, fn.c_str()) < 0) { |
| 85 | unlink(name); |
| 86 | createZIDFile(name); |
| 87 | return; |
| 88 | } |
| 89 | fdOld = fopen(fn.c_str(), "rb"); // reopen old format in read only mode |
| 90 | |
| 91 | // Get first record from old file - is the own ZID |
| 92 | fseek(fdOld, 0L, SEEK_SET); |
| 93 | if (fread(&recOld, sizeof(zidrecord1_t), 1, fdOld) != 1) { |
| 94 | fclose(fdOld); |
| 95 | return; |
| 96 | } |
| 97 | if (recOld.ownZid != 1) { |
| 98 | fclose(fdOld); |
| 99 | return; |
| 100 | } |
| 101 | zidFile = fopen(name, "wb+"); // create new format file in binary r/w mode |
| 102 | if (zidFile == NULL) { |
| 103 | return; |
| 104 | } |
| 105 | // create ZIDRecord in new format, copy over own ZID and write the record |
| 106 | ZIDRecord rec(recOld.identifier); |
| 107 | rec.setOwnZIDRecord(); |
| 108 | if (fwrite(rec.getRecordData(), rec.getRecordLength(), 1, zidFile) < 1) |
| 109 | ++errors; |
| 110 | |
| 111 | // now copy over all valid records from old ZID file format. |
| 112 | // Sequentially read old records, sequentially write new records |
| 113 | int numRead; |
| 114 | do { |
| 115 | numRead = fread(&recOld, sizeof(zidrecord1_t), 1, fdOld); |
| 116 | if (numRead == 0) { // all old records processed |
| 117 | break; |
| 118 | } |
| 119 | // skip own ZID record and invalid records |
| 120 | if (recOld.ownZid == 1 || recOld.recValid == 0) { |
| 121 | continue; |
| 122 | } |
| 123 | ZIDRecord rec2(recOld.identifier); |
| 124 | rec2.setValid(); |
| 125 | if (recOld.rs1Valid & SASVerified) { |
| 126 | rec2.setSasVerified(); |
| 127 | } |
| 128 | rec2.setNewRs1(recOld.rs2Data); |
| 129 | rec2.setNewRs1(recOld.rs1Data); |
| 130 | if (fwrite(rec2.getRecordData(), rec2.getRecordLength(), 1, zidFile) < 1) |
| 131 | ++errors; |
| 132 | |
| 133 | } while (numRead == 1); |
| 134 | fflush(zidFile); |
| 135 | } |
| 136 | |
| 137 | ZIDFile::~ZIDFile() { |
| 138 | close(); |
| 139 | } |
| 140 | |
| 141 | ZIDFile* ZIDFile::getInstance() { |
| 142 | |
| 143 | if (instance == NULL) { |
| 144 | instance = new ZIDFile(); |
| 145 | } |
| 146 | return instance; |
| 147 | } |
| 148 | |
| 149 | int ZIDFile::open(char* name) { |
| 150 | |
| 151 | // check for an already active ZID file |
| 152 | if (zidFile != NULL) { |
| 153 | return 0; |
| 154 | } |
| 155 | if ((zidFile = fopen(name, "rb+")) == NULL) { |
| 156 | createZIDFile(name); |
| 157 | } else { |
| 158 | checkDoMigration(name); |
| 159 | if (zidFile != NULL) { |
| 160 | ZIDRecord rec; |
| 161 | fseek(zidFile, 0L, SEEK_SET); |
| 162 | if (fread(rec.getRecordData(), rec.getRecordLength(), 1, zidFile) != 1) { |
| 163 | fclose(zidFile); |
| 164 | zidFile = NULL; |
| 165 | return -1; |
| 166 | } |
| 167 | if (!rec.isOwnZIDRecord()) { |
| 168 | fclose(zidFile); |
| 169 | zidFile = NULL; |
| 170 | return -1; |
| 171 | } |
| 172 | memcpy(associatedZid, rec.getIdentifier(), IDENTIFIER_LEN); |
| 173 | } |
| 174 | } |
| 175 | return ((zidFile == NULL) ? -1 : 1); |
| 176 | } |
| 177 | |
| 178 | void ZIDFile::close() { |
| 179 | |
| 180 | if (zidFile != NULL) { |
| 181 | fclose(zidFile); |
| 182 | zidFile = NULL; |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | unsigned int ZIDFile::getRecord(ZIDRecord* zidRecord) { |
| 187 | unsigned long pos; |
| 188 | ZIDRecord rec; |
| 189 | int numRead; |
| 190 | |
| 191 | // set read pointer behind first record ( |
| 192 | fseek(zidFile, rec.getRecordLength(), SEEK_SET); |
| 193 | |
| 194 | do { |
| 195 | pos = ftell(zidFile); |
| 196 | numRead = fread(rec.getRecordData(), rec.getRecordLength(), 1, zidFile); |
| 197 | if (numRead == 0) { |
| 198 | break; |
| 199 | } |
| 200 | |
| 201 | // skip own ZID record and invalid records |
| 202 | if (rec.isOwnZIDRecord() || !rec.isValid()) { |
| 203 | continue; |
| 204 | } |
| 205 | |
| 206 | } while (numRead == 1 && |
| 207 | memcmp(zidRecord->getIdentifier(), rec.getIdentifier(), IDENTIFIER_LEN) != 0); |
| 208 | |
| 209 | // If we reached end of file, then no record with the ZID |
| 210 | // found. We need to create a new ZID record. |
| 211 | if (numRead == 0) { |
| 212 | // create new record |
| 213 | ZIDRecord rec1(zidRecord->getIdentifier()); |
| 214 | rec1.setValid(); |
| 215 | if (fwrite(rec1.getRecordData(), rec1.getRecordLength(), 1, zidFile) < 1) |
| 216 | ++errors; |
| 217 | memcpy(zidRecord->getRecordData(), rec1.getRecordData(), rec1.getRecordLength()); |
| 218 | } else { |
| 219 | // Copy the read data into caller's the record storage |
| 220 | memcpy(zidRecord->getRecordData(), rec.getRecordData(), rec.getRecordLength()); |
| 221 | } |
| 222 | |
| 223 | // remember position of record in file for save operation |
| 224 | zidRecord->setPosition(pos); |
| 225 | return 1; |
| 226 | } |
| 227 | |
| 228 | unsigned int ZIDFile::saveRecord(ZIDRecord *zidRecord) { |
| 229 | |
| 230 | fseek(zidFile, zidRecord->getPosition(), SEEK_SET); |
| 231 | if (fwrite(zidRecord->getRecordData(), zidRecord->getRecordLength(), 1, zidFile) < 1) |
| 232 | ++errors; |
| 233 | fflush(zidFile); |
| 234 | return 1; |
| 235 | } |
| 236 | |
| 237 | |
| 238 | #ifdef UNIT_TEST |
| 239 | |
| 240 | #include <iostream> |
| 241 | #include <unistd.h> |
| 242 | using namespace std; |
| 243 | |
| 244 | static void hexdump(const char* title, const unsigned char *s, int l) { |
| 245 | int n=0; |
| 246 | |
| 247 | if (s == NULL) return; |
| 248 | |
| 249 | fprintf(stderr, "%s",title); |
| 250 | for (; n < l ; ++n) { |
| 251 | if ((n%16) == 0) |
| 252 | fprintf(stderr, "\n%04x",n); |
| 253 | fprintf(stderr, " %02x",s[n]); |
| 254 | } |
| 255 | fprintf(stderr, "\n"); |
| 256 | } |
| 257 | |
| 258 | int main(int argc, char *argv[]) { |
| 259 | |
| 260 | unsigned char myId[IDENTIFIER_LEN]; |
| 261 | ZIDFile *zid = ZIDFile::getInstance(); |
| 262 | |
| 263 | unlink("testzid2"); |
| 264 | zid->open("testzid2"); |
| 265 | hexdump("My ZID: ", zid->getZid(), IDENTIFIER_LEN); |
| 266 | memcpy(myId, zid->getZid(), IDENTIFIER_LEN); |
| 267 | zid->close(); |
| 268 | |
| 269 | zid->open("testzid2"); |
| 270 | if (memcmp(myId, zid->getZid(), IDENTIFIER_LEN) != 0) { |
| 271 | cerr << "Wrong ZID in testfile" << endl; |
| 272 | return 1; |
| 273 | } |
| 274 | |
| 275 | // Create a new ZID record for peer ZID "123456789012" |
| 276 | ZIDRecord zr3((unsigned char*) "123456789012"); |
| 277 | zid->getRecord(&zr3); |
| 278 | if (!zr3.isValid()) { |
| 279 | cerr << "New ZID record '123456789012' not set to valid" << endl; |
| 280 | return 1; |
| 281 | } |
| 282 | zid->saveRecord(&zr3); |
| 283 | |
| 284 | // create a second record with peer ZID "210987654321" |
| 285 | ZIDRecord zr4((unsigned char*) "210987654321"); |
| 286 | zid->getRecord(&zr4); |
| 287 | if (!zr4.isValid()) { |
| 288 | cerr << "New ZID record '210987654321' not set to valid" << endl; |
| 289 | return 1; |
| 290 | } |
| 291 | zid->saveRecord(&zr4); |
| 292 | |
| 293 | // now set a first RS1 with default expiration interval, check |
| 294 | // if set correctly, valid flag and expiration interval |
| 295 | zr3.setNewRs1((unsigned char*) "11122233344455566677788899900012"); |
| 296 | if (memcmp(zr3.getRs1(), "11122233344455566677788899900012", RS_LENGTH) != 0) { |
| 297 | cerr << "RS1 was not set (111...012)" << endl; |
| 298 | return 1; |
| 299 | } |
| 300 | if (!zr3.isRs1Valid()) { |
| 301 | cerr << "RS1 was not set to valid state (111...012)" << endl; |
| 302 | return 1; |
| 303 | } |
| 304 | if (!zr3.isRs1NotExpired()) { |
| 305 | cerr << "RS1 expired (111...012)" << endl; |
| 306 | return 1; |
| 307 | } |
| 308 | if (zr3.isRs2Valid()) { |
| 309 | cerr << "RS2 was set to valid state (111...012)" << endl; |
| 310 | return 1; |
| 311 | } |
| 312 | zid->saveRecord(&zr3); |
| 313 | |
| 314 | // create a second RS1, RS2 will become the first RS1, check |
| 315 | // if set correctly, valid flag and expiration interval for both |
| 316 | // RS1 and RS2 |
| 317 | zr3.setNewRs1((unsigned char*) "00099988877766655544433322211121"); |
| 318 | if (memcmp(zr3.getRs1(), "00099988877766655544433322211121", RS_LENGTH) != 0) { |
| 319 | cerr << "RS1 was not set (000...121)" << endl; |
| 320 | return 1; |
| 321 | } |
| 322 | if (!zr3.isRs1Valid()) { |
| 323 | cerr << "RS1 was not set to valid state (000...121)" << endl; |
| 324 | return 1; |
| 325 | } |
| 326 | if (!zr3.isRs1NotExpired()) { |
| 327 | cerr << "RS1 expired (000...121)" << endl; |
| 328 | return 1; |
| 329 | } |
| 330 | if (memcmp(zr3.getRs2(), "11122233344455566677788899900012", RS_LENGTH) != 0) { |
| 331 | cerr << "RS2 was not set (111...012)" << endl; |
| 332 | return 1; |
| 333 | } |
| 334 | if (!zr3.isRs2Valid()) { |
| 335 | cerr << "RS2 was not set to valid state (111...012)" << endl; |
| 336 | return 1; |
| 337 | } |
| 338 | if (!zr3.isRs2NotExpired()) { |
| 339 | cerr << "RS2 expired (111...012)" << endl; |
| 340 | return 1; |
| 341 | } |
| 342 | zid->saveRecord(&zr3); |
| 343 | |
| 344 | zid->close(); |
| 345 | |
| 346 | // Reopen, check if first record is still valid, RSx vaild and |
| 347 | // not expired. Then manipulate 2nd record. |
| 348 | zid->open("testzid2"); |
| 349 | |
| 350 | ZIDRecord zr3a((unsigned char*) "123456789012"); |
| 351 | zid->getRecord(&zr3a); |
| 352 | if (!zr3a.isValid()) { |
| 353 | cerr << "Re-read ZID record '123456789012' not set to valid" << endl; |
| 354 | return 1; |
| 355 | } |
| 356 | if (memcmp(zr3a.getRs1(), "00099988877766655544433322211121", RS_LENGTH) != 0) { |
| 357 | cerr << "re-read RS1 was not set (000...121)" << endl; |
| 358 | return 1; |
| 359 | } |
| 360 | if (!zr3a.isRs1Valid()) { |
| 361 | cerr << "Re-read RS1 was not set to valid state (000...121)" << endl; |
| 362 | return 1; |
| 363 | } |
| 364 | if (!zr3a.isRs1NotExpired()) { |
| 365 | cerr << "re-read RS1 expired (000...121)" << endl; |
| 366 | return 1; |
| 367 | } |
| 368 | if (memcmp(zr3a.getRs2(), "11122233344455566677788899900012", RS_LENGTH) != 0) { |
| 369 | cerr << "re-read RS2 was not set (111...012)" << endl; |
| 370 | return 1; |
| 371 | } |
| 372 | if (!zr3a.isRs2Valid()) { |
| 373 | cerr << "Re-read RS2 was not set to valid state (111...012)" << endl; |
| 374 | return 1; |
| 375 | } |
| 376 | if (!zr3a.isRs2NotExpired()) { |
| 377 | cerr << "Re-read RS2 expired (111...012)" << endl; |
| 378 | return 1; |
| 379 | } |
| 380 | |
| 381 | ZIDRecord zr5((unsigned char*) "210987654321"); |
| 382 | zid->getRecord(&zr5); |
| 383 | |
| 384 | |
| 385 | // set new RS1 with expire interval of 5 second, then check immediatly |
| 386 | zr5.setNewRs1((unsigned char*) "aaa22233344455566677788899900012", 5); |
| 387 | if (!zr5.isValid()) { |
| 388 | cerr << "Re-read ZID record '210987654321' not set to valid" << endl; |
| 389 | return 1; |
| 390 | } |
| 391 | if (memcmp(zr5.getRs1(), "aaa22233344455566677788899900012", RS_LENGTH) != 0) { |
| 392 | cerr << "RS1 (2) was not set (aaa...012)" << endl; |
| 393 | return 1; |
| 394 | } |
| 395 | if (!zr5.isRs1Valid()) { |
| 396 | cerr << "RS1 (2) was not set to valid state (aaa...012)" << endl; |
| 397 | return 1; |
| 398 | } |
| 399 | if (!zr5.isRs1NotExpired()) { |
| 400 | cerr << "RS1 (2) expired (aaa...012)" << endl; |
| 401 | return 1; |
| 402 | } |
| 403 | |
| 404 | // wait for 6 second, now the expire check shall fail |
| 405 | sleep(6); |
| 406 | if (zr5.isRs1NotExpired()) { |
| 407 | cerr << "RS1 (2) is not expired after defined interval (aaa...012)" << endl; |
| 408 | return 1; |
| 409 | } |
| 410 | |
| 411 | zr5.setNewRs1((unsigned char*) "bbb99988877766655544433322211121", 256); |
| 412 | zid->saveRecord(&zr5); |
| 413 | |
| 414 | zid->close(); |
| 415 | |
| 416 | // Test migration |
| 417 | zid->open("testzidOld"); |
| 418 | zid->close(); |
| 419 | |
| 420 | } |
| 421 | |
| 422 | #endif |
| 423 | |
| 424 | /** EMACS ** |
| 425 | * Local variables: |
| 426 | * mode: c++ |
| 427 | * c-default-style: ellemtel |
| 428 | * c-basic-offset: 4 |
| 429 | * End: |
| 430 | */ |