Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame] | 1 | /* |
| 2 | This class maps the ZRTP C calls to ZRTP C++ methods. |
Alexandre Lision | e24852d | 2014-02-04 13:13:02 -0500 | [diff] [blame] | 3 | Copyright (C) 2010 Werner Dittmann |
Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame] | 4 | |
| 5 | This program is free software: you can redistribute it and/or modify |
Alexandre Lision | e24852d | 2014-02-04 13:13:02 -0500 | [diff] [blame] | 6 | it under the terms of the GNU General Public License as published by |
Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame] | 7 | the Free Software Foundation, either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | |
| 18 | */ |
| 19 | |
| 20 | #include <libzrtpcpp/ZrtpCallback.h> |
| 21 | #include <libzrtpcpp/ZrtpConfigure.h> |
Alexandre Lision | e24852d | 2014-02-04 13:13:02 -0500 | [diff] [blame] | 22 | #include <libzrtpcpp/ZIDFile.h> |
Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame] | 23 | #include <libzrtpcpp/ZRtp.h> |
| 24 | #include <libzrtpcpp/ZrtpCallbackWrapper.h> |
| 25 | #include <libzrtpcpp/ZrtpCWrapper.h> |
| 26 | #include <libzrtpcpp/ZrtpCrc32.h> |
| 27 | |
| 28 | static int32_t zrtp_initZidFile(const char* zidFilename); |
| 29 | |
| 30 | ZrtpContext* zrtp_CreateWrapper() |
| 31 | { |
| 32 | ZrtpContext* zc = new ZrtpContext; |
| 33 | zc->configure = 0; |
| 34 | zc->zrtpEngine = 0; |
| 35 | zc->zrtpCallback = 0; |
| 36 | |
| 37 | return zc; |
| 38 | } |
| 39 | |
| 40 | void zrtp_initializeZrtpEngine(ZrtpContext* zrtpContext, |
| 41 | zrtp_Callbacks *cb, const char* id, |
| 42 | const char* zidFilename, |
| 43 | void* userData, |
| 44 | int32_t mitmMode) |
| 45 | { |
| 46 | std::string clientIdString(id); |
| 47 | |
| 48 | zrtpContext->zrtpCallback = new ZrtpCallbackWrapper(cb, zrtpContext); |
| 49 | zrtpContext->userData = userData; |
| 50 | |
| 51 | if (zrtpContext->configure == 0) { |
| 52 | zrtpContext->configure = new ZrtpConfigure(); |
| 53 | zrtpContext->configure->setStandardConfig(); |
| 54 | } |
| 55 | |
| 56 | // Initialize ZID file (cache) and get my own ZID |
| 57 | zrtp_initZidFile(zidFilename); |
Alexandre Lision | e24852d | 2014-02-04 13:13:02 -0500 | [diff] [blame] | 58 | ZIDFile* zf = ZIDFile::getInstance(); |
| 59 | const unsigned char* myZid = zf->getZid(); |
Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame] | 60 | |
| 61 | zrtpContext->zrtpEngine = new ZRtp((uint8_t*)myZid, zrtpContext->zrtpCallback, |
| 62 | clientIdString, zrtpContext->configure, mitmMode == 0 ? false : true); |
| 63 | } |
| 64 | |
| 65 | void zrtp_DestroyWrapper(ZrtpContext* zrtpContext) { |
| 66 | |
| 67 | if (zrtpContext == NULL) |
| 68 | return; |
| 69 | |
| 70 | delete zrtpContext->zrtpEngine; |
| 71 | zrtpContext->zrtpEngine = NULL; |
| 72 | |
| 73 | delete zrtpContext->zrtpCallback; |
| 74 | zrtpContext->zrtpCallback = NULL; |
| 75 | |
| 76 | delete zrtpContext->configure; |
| 77 | zrtpContext->configure = NULL; |
| 78 | |
| 79 | delete zrtpContext; |
| 80 | } |
| 81 | |
| 82 | static int32_t zrtp_initZidFile(const char* zidFilename) { |
Alexandre Lision | e24852d | 2014-02-04 13:13:02 -0500 | [diff] [blame] | 83 | ZIDFile* zf = ZIDFile::getInstance(); |
Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame] | 84 | |
| 85 | if (!zf->isOpen()) { |
| 86 | std::string fname; |
| 87 | if (zidFilename == NULL) { |
| 88 | char *home = getenv("HOME"); |
| 89 | std::string baseDir = (home != NULL) ? (std::string(home) + std::string("/.")) |
| 90 | : std::string("."); |
| 91 | fname = baseDir + std::string("GNUccRTP.zid"); |
| 92 | zidFilename = fname.c_str(); |
| 93 | } |
| 94 | return zf->open((char *)zidFilename); |
| 95 | } |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | int32_t zrtp_CheckCksum(uint8_t* buffer, uint16_t temp, uint32_t crc) |
| 100 | { |
| 101 | return zrtpCheckCksum(buffer, temp, crc); |
| 102 | } |
| 103 | |
| 104 | uint32_t zrtp_GenerateCksum(uint8_t* buffer, uint16_t temp) |
| 105 | { |
| 106 | return zrtpGenerateCksum(buffer, temp); |
| 107 | } |
| 108 | |
| 109 | uint32_t zrtp_EndCksum(uint32_t crc) |
| 110 | { |
| 111 | return zrtpEndCksum(crc); |
| 112 | } |
| 113 | |
| 114 | /* |
| 115 | * Applications use the following methods to control ZRTP, for example |
| 116 | * to enable ZRTP, set flags etc. |
| 117 | */ |
| 118 | void zrtp_startZrtpEngine(ZrtpContext* zrtpContext) { |
| 119 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 120 | zrtpContext->zrtpEngine->startZrtpEngine(); |
| 121 | } |
| 122 | |
| 123 | void zrtp_stopZrtpEngine(ZrtpContext* zrtpContext) { |
| 124 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 125 | zrtpContext->zrtpEngine->stopZrtp(); |
| 126 | } |
| 127 | |
Alexandre Lision | e24852d | 2014-02-04 13:13:02 -0500 | [diff] [blame] | 128 | void zrtp_processZrtpMessage(ZrtpContext* zrtpContext, uint8_t *extHeader, uint32_t peerSSRC) { |
Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame] | 129 | if (zrtpContext && zrtpContext->zrtpEngine) |
Alexandre Lision | e24852d | 2014-02-04 13:13:02 -0500 | [diff] [blame] | 130 | zrtpContext->zrtpEngine->processZrtpMessage(extHeader, peerSSRC); |
Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | void zrtp_processTimeout(ZrtpContext* zrtpContext) { |
| 134 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 135 | zrtpContext->zrtpEngine->processTimeout(); |
| 136 | } |
| 137 | |
| 138 | //int32_t zrtp_handleGoClear(ZrtpContext* zrtpContext, uint8_t *extHeader) |
| 139 | //{ |
| 140 | // if (zrtpContext && zrtpContext->zrtpEngine) |
| 141 | // return zrtpContext->zrtpEngine->handleGoClear(extHeader) ? 1 : 0; |
| 142 | // |
| 143 | // return 0; |
| 144 | //} |
| 145 | |
| 146 | void zrtp_setAuxSecret(ZrtpContext* zrtpContext, uint8_t* data, int32_t length) { |
| 147 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 148 | zrtpContext->zrtpEngine->setAuxSecret(data, length); |
| 149 | } |
| 150 | |
| 151 | int32_t zrtp_inState(ZrtpContext* zrtpContext, int32_t state) { |
| 152 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 153 | return zrtpContext->zrtpEngine->inState(state) ? 1 : 0; |
| 154 | |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | void zrtp_SASVerified(ZrtpContext* zrtpContext) { |
| 159 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 160 | zrtpContext->zrtpEngine->SASVerified(); |
| 161 | } |
| 162 | |
| 163 | void zrtp_resetSASVerified(ZrtpContext* zrtpContext) { |
| 164 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 165 | zrtpContext->zrtpEngine->resetSASVerified(); |
| 166 | } |
| 167 | |
Alexandre Lision | e24852d | 2014-02-04 13:13:02 -0500 | [diff] [blame] | 168 | char* zrtp_getHelloHash(ZrtpContext* zrtpContext) { |
Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame] | 169 | std::string ret; |
| 170 | if (zrtpContext && zrtpContext->zrtpEngine) |
Alexandre Lision | e24852d | 2014-02-04 13:13:02 -0500 | [diff] [blame] | 171 | ret = zrtpContext->zrtpEngine->getHelloHash(); |
Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame] | 172 | else |
| 173 | return NULL; |
| 174 | |
| 175 | if (ret.size() == 0) |
| 176 | return NULL; |
| 177 | |
| 178 | char* retval = (char*)malloc(ret.size()+1); |
| 179 | strcpy(retval, ret.c_str()); |
| 180 | return retval; |
| 181 | } |
| 182 | |
| 183 | char* zrtp_getPeerHelloHash(ZrtpContext* zrtpContext) { |
| 184 | std::string ret; |
| 185 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 186 | ret = zrtpContext->zrtpEngine->getPeerHelloHash(); |
| 187 | else |
| 188 | return NULL; |
| 189 | |
| 190 | if (ret.size() == 0) |
| 191 | return NULL; |
| 192 | |
| 193 | char* retval = (char*)malloc(ret.size()+1); |
| 194 | strcpy(retval, ret.c_str()); |
| 195 | return retval; |
| 196 | } |
| 197 | |
| 198 | char* zrtp_getMultiStrParams(ZrtpContext* zrtpContext, int32_t *length) { |
| 199 | std::string ret; |
| 200 | |
| 201 | *length = 0; |
| 202 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 203 | ret = zrtpContext->zrtpEngine->getMultiStrParams(); |
| 204 | else |
| 205 | return NULL; |
| 206 | |
| 207 | if (ret.size() == 0) |
| 208 | return NULL; |
| 209 | |
| 210 | *length = ret.size(); |
| 211 | char* retval = (char*) malloc(ret.size()); |
| 212 | ret.copy(retval, ret.size(), 0); |
| 213 | return retval; |
| 214 | } |
| 215 | |
| 216 | void zrtp_setMultiStrParams(ZrtpContext* zrtpContext, char* parameters, int32_t length) { |
| 217 | if (!zrtpContext || !zrtpContext->zrtpEngine) |
| 218 | return; |
| 219 | |
| 220 | if (parameters == NULL) |
| 221 | return; |
| 222 | |
| 223 | std::string str(""); |
| 224 | str.assign(parameters, length); // set chars (bytes) to the string |
| 225 | |
| 226 | zrtpContext->zrtpEngine->setMultiStrParams(str); |
| 227 | } |
| 228 | |
| 229 | int32_t zrtp_isMultiStream(ZrtpContext* zrtpContext) { |
| 230 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 231 | return zrtpContext->zrtpEngine->isMultiStream() ? 1 : 0; |
| 232 | |
| 233 | return 0; |
| 234 | } |
| 235 | |
| 236 | int32_t zrtp_isMultiStreamAvailable(ZrtpContext* zrtpContext) { |
| 237 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 238 | return zrtpContext->zrtpEngine->isMultiStreamAvailable() ? 1 : 0; |
| 239 | |
| 240 | return 0; |
| 241 | } |
| 242 | |
| 243 | void zrtp_acceptEnrollment(ZrtpContext* zrtpContext, int32_t accepted) { |
| 244 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 245 | return zrtpContext->zrtpEngine->acceptEnrollment(accepted == 0 ? false : true); |
| 246 | } |
| 247 | |
| 248 | int32_t zrtp_isEnrollmentMode(ZrtpContext* zrtpContext) { |
| 249 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 250 | return zrtpContext->zrtpEngine->isEnrollmentMode() ? 1 : 0; |
| 251 | |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | void zrtp_setEnrollmentMode(ZrtpContext* zrtpContext, int32_t enrollmentMode) { |
| 256 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 257 | return zrtpContext->zrtpEngine->setEnrollmentMode(enrollmentMode == 0 ? false : true); |
| 258 | } |
| 259 | |
| 260 | int32_t isPeerEnrolled(ZrtpContext* zrtpContext) { |
| 261 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 262 | return zrtpContext->zrtpEngine->isPeerEnrolled() ? 1 : 0; |
| 263 | |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | int32_t zrtp_sendSASRelayPacket(ZrtpContext* zrtpContext, uint8_t* sh, char* render) { |
| 268 | if (zrtpContext && zrtpContext->zrtpEngine) { |
| 269 | std::string rn(render); |
| 270 | return zrtpContext->zrtpEngine->sendSASRelayPacket(sh, rn) ? 1 : 0; |
| 271 | } |
| 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | |
| 276 | const char* zrtp_getSasType(ZrtpContext* zrtpContext) { |
| 277 | if (zrtpContext && zrtpContext->zrtpEngine) { |
| 278 | std::string rn = zrtpContext->zrtpEngine->getSasType(); |
| 279 | return rn.c_str(); |
| 280 | } |
| 281 | return NULL; |
| 282 | } |
| 283 | |
| 284 | |
| 285 | uint8_t* zrtp_getSasHash(ZrtpContext* zrtpContext) { |
| 286 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 287 | return zrtpContext->zrtpEngine->getSasHash(); |
| 288 | |
| 289 | return NULL; |
| 290 | } |
| 291 | |
| 292 | int32_t zrtp_setSignatureData(ZrtpContext* zrtpContext, uint8_t* data, int32_t length) { |
| 293 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 294 | return zrtpContext->zrtpEngine->setSignatureData(data, length) ? 1 : 0; |
| 295 | |
| 296 | return 0; |
| 297 | } |
| 298 | |
| 299 | const uint8_t* zrtp_getSignatureData(ZrtpContext* zrtpContext) { |
| 300 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 301 | return zrtpContext->zrtpEngine->getSignatureData(); |
| 302 | |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | int32_t zrtp_getSignatureLength(ZrtpContext* zrtpContext) { |
| 307 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 308 | return zrtpContext->zrtpEngine->getSignatureLength(); |
| 309 | |
| 310 | return 0; |
| 311 | } |
| 312 | |
| 313 | void zrtp_conf2AckSecure(ZrtpContext* zrtpContext) { |
| 314 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 315 | zrtpContext->zrtpEngine->conf2AckSecure(); |
| 316 | } |
| 317 | |
| 318 | int32_t zrtp_getPeerZid(ZrtpContext* zrtpContext, uint8_t* data) { |
| 319 | if (data == NULL) |
| 320 | return 0; |
| 321 | |
| 322 | if (zrtpContext && zrtpContext->zrtpEngine) |
| 323 | return zrtpContext->zrtpEngine->getPeerZid(data); |
| 324 | |
| 325 | return 0; |
| 326 | } |
| 327 | |
Alexandre Lision | 51140e1 | 2013-12-02 10:54:09 -0500 | [diff] [blame] | 328 | /* |
| 329 | * The following methods wrap the ZRTP Configure functions |
| 330 | */ |
| 331 | int32_t zrtp_InitializeConfig (ZrtpContext* zrtpContext) |
| 332 | { |
| 333 | zrtpContext->configure = new ZrtpConfigure(); |
| 334 | return 1; |
| 335 | } |
| 336 | |
| 337 | static EnumBase* getEnumBase(zrtp_AlgoTypes type) |
| 338 | { |
| 339 | switch(type) { |
| 340 | case zrtp_HashAlgorithm: |
| 341 | return &zrtpHashes; |
| 342 | break; |
| 343 | |
| 344 | case zrtp_CipherAlgorithm: |
| 345 | return &zrtpSymCiphers; |
| 346 | break; |
| 347 | |
| 348 | case zrtp_PubKeyAlgorithm: |
| 349 | return &zrtpPubKeys; |
| 350 | break; |
| 351 | |
| 352 | case zrtp_SasType: |
| 353 | return &zrtpSasTypes; |
| 354 | break; |
| 355 | |
| 356 | case zrtp_AuthLength: |
| 357 | return &zrtpAuthLengths; |
| 358 | break; |
| 359 | |
| 360 | default: |
| 361 | return NULL; |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | char** zrtp_getAlgorithmNames(ZrtpContext* zrtpContext, Zrtp_AlgoTypes type) |
| 366 | { |
| 367 | std::list<std::string>* names = NULL; |
| 368 | EnumBase* base = getEnumBase(type); |
| 369 | |
| 370 | if (!base) |
| 371 | return NULL; |
| 372 | |
| 373 | names = base->getAllNames(); |
| 374 | int size = base->getSize(); |
| 375 | char** cNames = new char* [size+1]; |
| 376 | cNames[size] = NULL; |
| 377 | |
| 378 | std::list<std::string >::iterator b = names->begin(); |
| 379 | std::list<std::string >::iterator e = names->end(); |
| 380 | |
| 381 | for (int i = 0; b != e; b++, i++) { |
| 382 | cNames[i] = new char [(*b).size()+1]; |
| 383 | strcpy(cNames[i], (*b).c_str()); |
| 384 | } |
| 385 | return cNames; |
| 386 | } |
| 387 | |
| 388 | void zrtp_freeAlgorithmNames(char** names) |
| 389 | { |
| 390 | if (!names) |
| 391 | return; |
| 392 | |
| 393 | for (char** cp = names; *cp; cp++) |
| 394 | delete *cp; |
| 395 | |
| 396 | delete names; |
| 397 | } |
| 398 | |
| 399 | void zrtp_setStandardConfig(ZrtpContext* zrtpContext) |
| 400 | { |
| 401 | zrtpContext->configure->setStandardConfig(); |
| 402 | } |
| 403 | |
| 404 | void zrtp_setMandatoryOnly(ZrtpContext* zrtpContext) |
| 405 | { |
| 406 | zrtpContext->configure->setMandatoryOnly(); |
| 407 | } |
| 408 | |
| 409 | int32_t zrtp_addAlgo(ZrtpContext* zrtpContext, zrtp_AlgoTypes algoType, const char* algo) |
| 410 | { |
| 411 | EnumBase* base = getEnumBase(algoType); |
| 412 | AlgorithmEnum& a = base->getByName(algo); |
| 413 | |
| 414 | return zrtpContext->configure->addAlgo((AlgoTypes)algoType, a); |
| 415 | } |
| 416 | |
| 417 | int32_t zrtp_addAlgoAt(ZrtpContext* zrtpContext, zrtp_AlgoTypes algoType, const char* algo, int32_t index) |
| 418 | { |
| 419 | EnumBase* base = getEnumBase(algoType); |
| 420 | AlgorithmEnum& a = base->getByName(algo); |
| 421 | |
| 422 | return zrtpContext->configure->addAlgoAt((AlgoTypes)algoType, a, index); |
| 423 | } |
| 424 | |
| 425 | int32_t zrtp_removeAlgo(ZrtpContext* zrtpContext, zrtp_AlgoTypes algoType, const char* algo) |
| 426 | { |
| 427 | EnumBase* base = getEnumBase(algoType); |
| 428 | AlgorithmEnum& a = base->getByName(algo); |
| 429 | |
| 430 | return zrtpContext->configure->removeAlgo((AlgoTypes)algoType, a); |
| 431 | } |
| 432 | |
| 433 | int32_t zrtp_getNumConfiguredAlgos(ZrtpContext* zrtpContext, zrtp_AlgoTypes algoType) |
| 434 | { |
| 435 | return zrtpContext->configure->getNumConfiguredAlgos((AlgoTypes)algoType); |
| 436 | } |
| 437 | |
| 438 | const char* zrtp_getAlgoAt(ZrtpContext* zrtpContext, Zrtp_AlgoTypes algoType, int32_t index) |
| 439 | { |
| 440 | AlgorithmEnum& a = zrtpContext->configure->getAlgoAt((AlgoTypes)algoType, index); |
| 441 | return a.getName(); |
| 442 | } |
| 443 | |
| 444 | int32_t zrtp_containsAlgo(ZrtpContext* zrtpContext, Zrtp_AlgoTypes algoType, const char* algo) |
| 445 | { |
| 446 | EnumBase* base = getEnumBase(algoType); |
| 447 | AlgorithmEnum& a = base->getByName(algo); |
| 448 | |
| 449 | return zrtpContext->configure->containsAlgo((AlgoTypes)algoType, a) ? 1 : 0; |
| 450 | } |
| 451 | |
| 452 | void zrtp_setTrustedMitM(ZrtpContext* zrtpContext, int32_t yesNo) |
| 453 | { |
| 454 | zrtpContext->configure->setTrustedMitM(yesNo ? true : false); |
| 455 | } |
| 456 | |
| 457 | int32_t zrtp_isTrustedMitM(ZrtpContext* zrtpContext) |
| 458 | { |
| 459 | return zrtpContext->configure->isTrustedMitM() ? 1 : 0; |
| 460 | } |
| 461 | |
| 462 | void zrtp_setSasSignature(ZrtpContext* zrtpContext, int32_t yesNo) |
| 463 | { |
| 464 | zrtpContext->configure->setSasSignature(yesNo ? true : false); |
| 465 | } |
| 466 | |
| 467 | int32_t zrtp_isSasSignature(ZrtpContext* zrtpContext) |
| 468 | { |
| 469 | return zrtpContext->configure->isSasSignature() ? 1 : 0; |
| 470 | } |