| 1 |
// IMAP Handler |
| 2 |
// |
| 3 |
// Douglas Thrift |
| 4 |
// |
| 5 |
// IMAPHandler.cpp |
| 6 |
|
| 7 |
#include "IMAPHandler.h" |
| 8 |
|
| 9 |
IMAPHandler::IMAPHandler(const string& server, bool tls) |
| 10 |
{ |
| 11 |
letter = 'a'; |
| 12 |
number = 0; |
| 13 |
|
| 14 |
this->tls = tls; |
| 15 |
buffer = new char[BUFSIZ + 1]; |
| 16 |
|
| 17 |
#ifdef _WIN32 |
| 18 |
if (WSAStartup(MAKEWORD(2, 0), &data) != 0) |
| 19 |
{ |
| 20 |
error(program + ": WSAStartup"); |
| 21 |
exit(1); |
| 22 |
} |
| 23 |
#endif // _WIN32 |
| 24 |
|
| 25 |
if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) |
| 26 |
{ |
| 27 |
error(program + ": Socket"); |
| 28 |
exit(1); |
| 29 |
} |
| 30 |
|
| 31 |
sockaddr_in address; |
| 32 |
hostent* host; |
| 33 |
|
| 34 |
address.sin_family = AF_INET; |
| 35 |
|
| 36 |
if ((host = gethostbyname(server.c_str())) == NULL) |
| 37 |
{ |
| 38 |
error(program + ": Host: " + server, true); |
| 39 |
exit(1); |
| 40 |
} |
| 41 |
|
| 42 |
address.sin_addr = *((in_addr*)*host->h_addr_list); |
| 43 |
address.sin_port = htons(tls ? 993 : 143); |
| 44 |
|
| 45 |
if (connect(sock, (sockaddr*)&address, sizeof(sockaddr_in)) == |
| 46 |
SOCKET_ERROR) |
| 47 |
{ |
| 48 |
error(program + ": Connect"); |
| 49 |
exit(1); |
| 50 |
} |
| 51 |
|
| 52 |
if (tls) |
| 53 |
{ |
| 54 |
SSL_load_error_strings(); |
| 55 |
SSL_library_init(); |
| 56 |
|
| 57 |
char* seed = new char[BUFSIZ + 1]; |
| 58 |
time_t moment = time(NULL); |
| 59 |
sprintf(seed, "froofy%sfoofoo", ctime(&moment)); |
| 60 |
|
| 61 |
RAND_add(seed, strlen(seed), 0.007456); |
| 62 |
|
| 63 |
delete [] seed; |
| 64 |
|
| 65 |
ctx = SSL_CTX_new(TLSv1_client_method()); |
| 66 |
if (ctx == NULL) |
| 67 |
{ |
| 68 |
cerr << program << ": SSL CTX New: " << |
| 69 |
ERR_reason_error_string(ERR_get_error()) << "\n"; |
| 70 |
exit(1); |
| 71 |
} |
| 72 |
|
| 73 |
ssl = SSL_new(ctx); |
| 74 |
|
| 75 |
if (SSL_set_fd(ssl, sock) == 0) |
| 76 |
{ |
| 77 |
cerr << program << ": SSL Set FD: " << |
| 78 |
ERR_reason_error_string(ERR_get_error()) << "\n"; |
| 79 |
exit(1); |
| 80 |
} |
| 81 |
|
| 82 |
if (int code = SSL_connect(ssl) <= 0) |
| 83 |
{ |
| 84 |
error(program + ": SSL Connect", code); |
| 85 |
exit(1); |
| 86 |
} |
| 87 |
} |
| 88 |
|
| 89 |
getline(); |
| 90 |
} |
| 91 |
|
| 92 |
IMAPHandler::~IMAPHandler() |
| 93 |
{ |
| 94 |
if (tls) |
| 95 |
{ |
| 96 |
SSL_shutdown(ssl); |
| 97 |
SSL_free(ssl); |
| 98 |
SSL_CTX_free(ctx); |
| 99 |
} |
| 100 |
|
| 101 |
closesocket(sock); |
| 102 |
|
| 103 |
delete [] buffer; |
| 104 |
|
| 105 |
#ifdef _WIN32 |
| 106 |
WSACleanup(); |
| 107 |
#endif // _WIN32 |
| 108 |
} |
| 109 |
|
| 110 |
string IMAPHandler::starttls() |
| 111 |
{ |
| 112 |
string answer = imap("STARTTLS"); |
| 113 |
|
| 114 |
if (success) |
| 115 |
{ |
| 116 |
tls = true; |
| 117 |
|
| 118 |
SSL_load_error_strings(); |
| 119 |
SSL_library_init(); |
| 120 |
|
| 121 |
char* seed = new char[BUFSIZ + 1]; |
| 122 |
time_t moment = time(NULL); |
| 123 |
sprintf(seed, "froofy%sfoofoo", ctime(&moment)); |
| 124 |
|
| 125 |
RAND_add(seed, strlen(seed), 0.007456); |
| 126 |
|
| 127 |
delete [] seed; |
| 128 |
|
| 129 |
ctx = SSL_CTX_new(TLSv1_client_method()); |
| 130 |
if (ctx == NULL) |
| 131 |
{ |
| 132 |
cerr << program << ": SSL CTX New: " << |
| 133 |
ERR_reason_error_string(ERR_get_error()) << "\n"; |
| 134 |
exit(1); |
| 135 |
} |
| 136 |
|
| 137 |
ssl = SSL_new(ctx); |
| 138 |
|
| 139 |
if (SSL_set_fd(ssl, sock) == 0) |
| 140 |
{ |
| 141 |
cerr << program << ": SSL Set FD: " << |
| 142 |
ERR_reason_error_string(ERR_get_error()) << "\n"; |
| 143 |
exit(1); |
| 144 |
} |
| 145 |
|
| 146 |
if (int code = SSL_connect(ssl) <= 0) |
| 147 |
{ |
| 148 |
error(program + ": SSL Connect", code); |
| 149 |
exit(1); |
| 150 |
} |
| 151 |
} |
| 152 |
|
| 153 |
return answer; |
| 154 |
} |
| 155 |
|
| 156 |
string IMAPHandler::command() |
| 157 |
{ |
| 158 |
char buffer[4]; |
| 159 |
sprintf(buffer, "%03u", number++); |
| 160 |
|
| 161 |
string sequence = letter + string(buffer); |
| 162 |
|
| 163 |
if (number > 999) |
| 164 |
{ |
| 165 |
letter++; |
| 166 |
number = 0; |
| 167 |
} |
| 168 |
|
| 169 |
if (letter > 'z') |
| 170 |
{ |
| 171 |
letter = 'a'; |
| 172 |
} |
| 173 |
|
| 174 |
return sequence; |
| 175 |
} |
| 176 |
|
| 177 |
string IMAPHandler::imap(const string& imap) |
| 178 |
{ |
| 179 |
string result; |
| 180 |
|
| 181 |
string sequence = command(); |
| 182 |
putline(sequence + " " + imap); |
| 183 |
|
| 184 |
while (true) |
| 185 |
{ |
| 186 |
string input = getline(); |
| 187 |
|
| 188 |
if (input.find(sequence + " OK") == 0) |
| 189 |
{ |
| 190 |
success = true; |
| 191 |
break; |
| 192 |
} |
| 193 |
else if (input.find(sequence + " NO") == 0 || input.find(sequence + |
| 194 |
" BAD") == 0) |
| 195 |
{ |
| 196 |
success = false; |
| 197 |
break; |
| 198 |
} |
| 199 |
else |
| 200 |
{ |
| 201 |
result += input + "\r\n"; |
| 202 |
} |
| 203 |
} |
| 204 |
|
| 205 |
return result; |
| 206 |
} |
| 207 |
|
| 208 |
string IMAPHandler::imap(const string& imap, const string& args) |
| 209 |
{ |
| 210 |
string result; |
| 211 |
|
| 212 |
string sequence = command(); |
| 213 |
putline(sequence + " " + imap + " " + args); |
| 214 |
|
| 215 |
while (true) |
| 216 |
{ |
| 217 |
string input = getline(); |
| 218 |
|
| 219 |
if (input.find(sequence + " OK") == 0) |
| 220 |
{ |
| 221 |
success = true; |
| 222 |
break; |
| 223 |
} |
| 224 |
else if (input.find(sequence + " NO") == 0 || input.find(sequence + |
| 225 |
" BAD") == 0) |
| 226 |
{ |
| 227 |
success = false; |
| 228 |
break; |
| 229 |
} |
| 230 |
else |
| 231 |
{ |
| 232 |
result += input + "\r\n"; |
| 233 |
} |
| 234 |
} |
| 235 |
|
| 236 |
return result; |
| 237 |
} |
| 238 |
|
| 239 |
string IMAPHandler::imap(const string& imap, const string& args, const string& |
| 240 |
message) |
| 241 |
{ |
| 242 |
string result; |
| 243 |
|
| 244 |
// |
| 245 |
|
| 246 |
return result; |
| 247 |
} |
| 248 |
|
| 249 |
void IMAPHandler::putline(const string line) |
| 250 |
{ |
| 251 |
if (debug) cerr << line << "\n"; |
| 252 |
|
| 253 |
sprintf(buffer, "%s\r\n", line.c_str()); |
| 254 |
|
| 255 |
if (tls) |
| 256 |
{ |
| 257 |
if (int code = SSL_write(ssl, buffer, strlen(buffer)) <= 0) |
| 258 |
{ |
| 259 |
error(program + ": SSL Write", code); |
| 260 |
exit(1); |
| 261 |
} |
| 262 |
} |
| 263 |
else |
| 264 |
{ |
| 265 |
if (send(sock, buffer, strlen(buffer), 0) == SOCKET_ERROR) |
| 266 |
{ |
| 267 |
error(program + ": Send"); |
| 268 |
exit(1); |
| 269 |
} |
| 270 |
} |
| 271 |
} |
| 272 |
|
| 273 |
string IMAPHandler::getline() |
| 274 |
{ |
| 275 |
string line; |
| 276 |
char byte; |
| 277 |
|
| 278 |
do |
| 279 |
{ |
| 280 |
if (tls) |
| 281 |
{ |
| 282 |
if (int code = SSL_read(ssl, &byte, 1) <= 0) |
| 283 |
{ |
| 284 |
error(program + ": SSL Read", code); |
| 285 |
exit(1); |
| 286 |
} |
| 287 |
} |
| 288 |
else |
| 289 |
{ |
| 290 |
if (recv(sock, &byte, 1, 0) == SOCKET_ERROR) |
| 291 |
{ |
| 292 |
error(program + ": Recv"); |
| 293 |
exit(1); |
| 294 |
} |
| 295 |
} |
| 296 |
|
| 297 |
if (byte != '\r' && byte != '\n') |
| 298 |
{ |
| 299 |
line += byte; |
| 300 |
} |
| 301 |
} |
| 302 |
while (byte != '\n'); |
| 303 |
|
| 304 |
if (debug) cerr << line << "\n"; |
| 305 |
|
| 306 |
return line; |
| 307 |
} |
| 308 |
|
| 309 |
void IMAPHandler::error(const string& prefix, bool host) |
| 310 |
{ |
| 311 |
#ifdef _WIN32 |
| 312 |
string error; |
| 313 |
|
| 314 |
switch (WSAGetLastError()) |
| 315 |
{ |
| 316 |
case WSAEACCES: |
| 317 |
error = "Permission denied."; |
| 318 |
break; |
| 319 |
case WSAEADDRINUSE: |
| 320 |
error = "Address already in use."; |
| 321 |
break; |
| 322 |
case WSAEADDRNOTAVAIL: |
| 323 |
error = "Cannot assign requested address."; |
| 324 |
break; |
| 325 |
case WSAEAFNOSUPPORT: |
| 326 |
error = "Address family not supported by protocol family."; |
| 327 |
break; |
| 328 |
case WSAEALREADY: |
| 329 |
error = "Operation already in progress."; |
| 330 |
break; |
| 331 |
case WSAECONNABORTED: |
| 332 |
error = "Software caused connection abort."; |
| 333 |
break; |
| 334 |
case WSAECONNREFUSED: |
| 335 |
error = "Connection refused."; |
| 336 |
break; |
| 337 |
case WSAECONNRESET: |
| 338 |
error = "Connection reset by peer."; |
| 339 |
break; |
| 340 |
case WSAEDESTADDRREQ: |
| 341 |
error = "Destination address required."; |
| 342 |
break; |
| 343 |
case WSAEFAULT: |
| 344 |
error = "Bad address."; |
| 345 |
break; |
| 346 |
case WSAEHOSTDOWN: |
| 347 |
error = "Host is down."; |
| 348 |
break; |
| 349 |
case WSAEHOSTUNREACH: |
| 350 |
error = "No route to host."; |
| 351 |
break; |
| 352 |
case WSAEINPROGRESS: |
| 353 |
error = "Operation now in progress."; |
| 354 |
break; |
| 355 |
case WSAEINTR: |
| 356 |
error = "Interrupted function call."; |
| 357 |
break; |
| 358 |
case WSAEINVAL: |
| 359 |
error = "Invalid argument."; |
| 360 |
break; |
| 361 |
case WSAEISCONN: |
| 362 |
error = "Socket is already connected."; |
| 363 |
break; |
| 364 |
case WSAEMFILE: |
| 365 |
error = "Too many open files."; |
| 366 |
break; |
| 367 |
case WSAEMSGSIZE: |
| 368 |
error = "Message too long."; |
| 369 |
break; |
| 370 |
case WSAENETDOWN: |
| 371 |
error = "Network is down."; |
| 372 |
break; |
| 373 |
case WSAENETRESET: |
| 374 |
error = "Network dropped connection on reset."; |
| 375 |
break; |
| 376 |
case WSAENETUNREACH: |
| 377 |
error = "Network is unreachable."; |
| 378 |
break; |
| 379 |
case WSAENOBUFS: |
| 380 |
error = "No buffer space available."; |
| 381 |
break; |
| 382 |
case WSAENOPROTOOPT: |
| 383 |
error = "Bad protocol option."; |
| 384 |
break; |
| 385 |
case WSAENOTCONN: |
| 386 |
error = "Socket is not connected."; |
| 387 |
break; |
| 388 |
case WSAENOTSOCK: |
| 389 |
error = "Socket operation on non-socket."; |
| 390 |
break; |
| 391 |
case WSAEOPNOTSUPP: |
| 392 |
error = "Operation not supported."; |
| 393 |
break; |
| 394 |
case WSAEPFNOSUPPORT: |
| 395 |
error = "Protocol family not supported."; |
| 396 |
break; |
| 397 |
case WSAEPROCLIM: |
| 398 |
error = "Too many processes."; |
| 399 |
break; |
| 400 |
case WSAEPROTONOSUPPORT: |
| 401 |
error = "Protocol not supported."; |
| 402 |
break; |
| 403 |
case WSAEPROTOTYPE: |
| 404 |
error = "Protocol wrong type for socket."; |
| 405 |
break; |
| 406 |
case WSAESHUTDOWN: |
| 407 |
error = "Cannot send after socket shutdown."; |
| 408 |
break; |
| 409 |
case WSAESOCKTNOSUPPORT: |
| 410 |
error = "Socket type not supported."; |
| 411 |
break; |
| 412 |
case WSAETIMEDOUT: |
| 413 |
error = "Connection timed out."; |
| 414 |
break; |
| 415 |
case WSATYPE_NOT_FOUND: |
| 416 |
error = "Class type not found."; |
| 417 |
break; |
| 418 |
case WSAEWOULDBLOCK: |
| 419 |
error = "Resource temporarily unavailable."; |
| 420 |
break; |
| 421 |
case WSAHOST_NOT_FOUND: |
| 422 |
error = "Host not found."; |
| 423 |
break; |
| 424 |
case WSA_INVALID_HANDLE: |
| 425 |
error = "Specified event object handle is invalid."; |
| 426 |
break; |
| 427 |
case WSA_INVALID_PARAMETER: |
| 428 |
error = "One or more parameters are invalid."; |
| 429 |
break; |
| 430 |
// case WSAINVALIDPROCTABLE: |
| 431 |
// error = "Invalid procedure table from service provider."; |
| 432 |
// break; |
| 433 |
// case WSAINVALIDPROVIDER: |
| 434 |
// error = "Invalid service provider version number."; |
| 435 |
// break; |
| 436 |
case WSA_IO_INCOMPLETE: |
| 437 |
error = "Overlapped I/O event object not in signaled state."; |
| 438 |
break; |
| 439 |
case WSA_IO_PENDING: |
| 440 |
error = "Overlapped operations will complete later."; |
| 441 |
break; |
| 442 |
case WSA_NOT_ENOUGH_MEMORY: |
| 443 |
error = "Insufficient memory available."; |
| 444 |
break; |
| 445 |
case WSANOTINITIALISED: |
| 446 |
error = "Successful WSAStartup not yet performed."; |
| 447 |
break; |
| 448 |
case WSANO_DATA: |
| 449 |
error = "Valid name, no data record of requested type."; |
| 450 |
break; |
| 451 |
case WSANO_RECOVERY: |
| 452 |
error = "This is a non-recoverable error."; |
| 453 |
break; |
| 454 |
// case WSAPROVIDERFAILEDINIT: |
| 455 |
// error = "Unable to initialize a service provider."; |
| 456 |
// break; |
| 457 |
case WSASYSCALLFAILURE: |
| 458 |
error = "System call failure."; |
| 459 |
break; |
| 460 |
case WSASYSNOTREADY: |
| 461 |
error = "Network subsystem is unavailable."; |
| 462 |
break; |
| 463 |
case WSATRY_AGAIN: |
| 464 |
error = "Non-authoritative host not found."; |
| 465 |
break; |
| 466 |
case WSAVERNOTSUPPORTED: |
| 467 |
error = "WINSOCK.DLL version out of range."; |
| 468 |
break; |
| 469 |
case WSAEDISCON: |
| 470 |
error = "Graceful shutdown in progress."; |
| 471 |
break; |
| 472 |
case WSA_OPERATION_ABORTED: |
| 473 |
error = "Overlapped operation aborted."; |
| 474 |
break; |
| 475 |
default: |
| 476 |
error = "Unknown error."; |
| 477 |
break; |
| 478 |
} |
| 479 |
|
| 480 |
cerr << prefix << ": " << error << "\n"; |
| 481 |
#else |
| 482 |
if (host) |
| 483 |
{ |
| 484 |
herror(prefix.c_str()); |
| 485 |
} |
| 486 |
else |
| 487 |
{ |
| 488 |
perror(prefix.c_str()); |
| 489 |
} |
| 490 |
#endif // _WIN32 |
| 491 |
} |
| 492 |
|
| 493 |
void IMAPHandler::error(const string& prefix, int code) |
| 494 |
{ |
| 495 |
string error; |
| 496 |
|
| 497 |
switch (SSL_get_error(ssl, code)) |
| 498 |
{ |
| 499 |
case SSL_ERROR_NONE: |
| 500 |
error = "The TLS/SSL I/O operation completed."; |
| 501 |
break; |
| 502 |
case SSL_ERROR_ZERO_RETURN: |
| 503 |
error = "The TLS/SSL connection has been closed."; |
| 504 |
break; |
| 505 |
case SSL_ERROR_WANT_READ: |
| 506 |
case SSL_ERROR_WANT_WRITE: |
| 507 |
case SSL_ERROR_WANT_CONNECT: |
| 508 |
// case SSL_ERROR_WANT_ACCEPT: |
| 509 |
case SSL_ERROR_WANT_X509_LOOKUP: |
| 510 |
error = "The operation did not complete."; |
| 511 |
break; |
| 512 |
case SSL_ERROR_SYSCALL: |
| 513 |
if (int err = ERR_get_error() != 0) |
| 514 |
{ |
| 515 |
error = ERR_reason_error_string(err); |
| 516 |
} |
| 517 |
else |
| 518 |
{ |
| 519 |
switch (code) |
| 520 |
{ |
| 521 |
case 0: |
| 522 |
error = "An EOF was observed that violates the protocol."; |
| 523 |
break; |
| 524 |
case -1: |
| 525 |
this->error(prefix); |
| 526 |
return; |
| 527 |
default: |
| 528 |
error = "Unknown error."; |
| 529 |
break; |
| 530 |
} |
| 531 |
} |
| 532 |
break; |
| 533 |
case SSL_ERROR_SSL: |
| 534 |
error = ERR_reason_error_string(ERR_get_error()); |
| 535 |
break; |
| 536 |
default: |
| 537 |
error = "Unknown error."; |
| 538 |
break; |
| 539 |
} |
| 540 |
|
| 541 |
cerr << prefix << ": " << error << "\n"; |
| 542 |
} |
