This is a port of cyaSSL 2.7.0.
Dependents: CyaSSL_DTLS_Cellular CyaSSL_DTLS_Ethernet
crl.c
00001 /* crl.c 00002 * 00003 * Copyright (C) 2006-2013 wolfSSL Inc. 00004 * 00005 * This file is part of CyaSSL. 00006 * 00007 * CyaSSL is free software; you can redistribute it and/or modify 00008 * it under the terms of the GNU General Public License as published by 00009 * the Free Software Foundation; either version 2 of the License, or 00010 * (at your option) any later version. 00011 * 00012 * CyaSSL is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 * GNU General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License 00018 * along with this program; if not, write to the Free Software 00019 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 00020 */ 00021 00022 #ifdef HAVE_CONFIG_H 00023 #include <config.h> 00024 #endif 00025 00026 #include <cyassl/ctaocrypt/settings.h> 00027 00028 #ifdef HAVE_CRL 00029 00030 #include <cyassl/internal.h> 00031 #include <cyassl/ctaoerror.h> 00032 00033 #include <dirent.h> 00034 #include <sys/stat.h> 00035 #include <string.h> 00036 00037 00038 /* Initialze CRL members */ 00039 int InitCRL(CYASSL_CRL* crl, CYASSL_CERT_MANAGER* cm) 00040 { 00041 CYASSL_ENTER("InitCRL"); 00042 00043 crl->cm = cm; 00044 crl->crlList = NULL; 00045 crl->monitors[0].path = NULL; 00046 crl->monitors[1].path = NULL; 00047 #ifdef HAVE_CRL_MONITOR 00048 crl->tid = 0; 00049 #endif 00050 if (InitMutex(&crl->crlLock) != 0) 00051 return BAD_MUTEX_ERROR; 00052 00053 return 0; 00054 } 00055 00056 00057 /* Initialze CRL Entry */ 00058 static int InitCRL_Entry(CRL_Entry* crle, DecodedCRL* dcrl) 00059 { 00060 CYASSL_ENTER("InitCRL_Entry"); 00061 00062 XMEMCPY(crle->issuerHash, dcrl->issuerHash, SHA_DIGEST_SIZE); 00063 /* XMEMCPY(crle->crlHash, dcrl->crlHash, SHA_DIGEST_SIZE); 00064 * copy the hash here if needed for optimized comparisons */ 00065 XMEMCPY(crle->lastDate, dcrl->lastDate, MAX_DATE_SIZE); 00066 XMEMCPY(crle->nextDate, dcrl->nextDate, MAX_DATE_SIZE); 00067 crle->lastDateFormat = dcrl->lastDateFormat; 00068 crle->nextDateFormat = dcrl->nextDateFormat; 00069 00070 crle->certs = dcrl->certs; /* take ownsership */ 00071 dcrl->certs = NULL; 00072 crle->totalCerts = dcrl->totalCerts; 00073 00074 return 0; 00075 } 00076 00077 00078 /* Free all CRL Entry resources */ 00079 static void FreeCRL_Entry(CRL_Entry* crle) 00080 { 00081 RevokedCert* tmp = crle->certs; 00082 00083 CYASSL_ENTER("FreeCRL_Entry"); 00084 00085 while(tmp) { 00086 RevokedCert* next = tmp->next; 00087 XFREE(tmp, NULL, DYNAMIC_TYPE_REVOKED); 00088 tmp = next; 00089 } 00090 } 00091 00092 00093 00094 /* Free all CRL resources */ 00095 void FreeCRL(CYASSL_CRL* crl, int dynamic) 00096 { 00097 CRL_Entry* tmp = crl->crlList; 00098 00099 CYASSL_ENTER("FreeCRL"); 00100 00101 if (crl->monitors[0].path) 00102 XFREE(crl->monitors[0].path, NULL, DYNAMIC_TYPE_CRL_MONITOR); 00103 00104 if (crl->monitors[1].path) 00105 XFREE(crl->monitors[1].path, NULL, DYNAMIC_TYPE_CRL_MONITOR); 00106 00107 while(tmp) { 00108 CRL_Entry* next = tmp->next; 00109 FreeCRL_Entry(tmp); 00110 XFREE(tmp, NULL, DYNAMIC_TYPE_CRL_ENTRY); 00111 tmp = next; 00112 } 00113 00114 #ifdef HAVE_CRL_MONITOR 00115 if (crl->tid != 0) { 00116 CYASSL_MSG("Canceling monitor thread"); 00117 pthread_cancel(crl->tid); 00118 } 00119 #endif 00120 FreeMutex(&crl->crlLock); 00121 if (dynamic) /* free self */ 00122 XFREE(crl, NULL, DYNAMIC_TYPE_CRL); 00123 } 00124 00125 00126 /* Is the cert ok with CRL, return 0 on success */ 00127 int CheckCertCRL(CYASSL_CRL* crl, DecodedCert* cert) 00128 { 00129 CRL_Entry* crle; 00130 int foundEntry = 0; 00131 int ret = 0; 00132 00133 CYASSL_ENTER("CheckCertCRL"); 00134 00135 if (LockMutex(&crl->crlLock) != 0) { 00136 CYASSL_MSG("LockMutex failed"); 00137 return BAD_MUTEX_ERROR; 00138 } 00139 00140 crle = crl->crlList; 00141 00142 while (crle) { 00143 if (XMEMCMP(crle->issuerHash, cert->issuerHash, SHA_DIGEST_SIZE) == 0) { 00144 CYASSL_MSG("Found CRL Entry on list"); 00145 CYASSL_MSG("Checking next date validity"); 00146 00147 if (!ValidateDate(crle->nextDate, crle->nextDateFormat, AFTER)) { 00148 CYASSL_MSG("CRL next date is no longer valid"); 00149 ret = ASN_AFTER_DATE_E; 00150 } 00151 else 00152 foundEntry = 1; 00153 break; 00154 } 00155 crle = crle->next; 00156 } 00157 00158 if (foundEntry) { 00159 RevokedCert* rc = crle->certs; 00160 00161 while (rc) { 00162 if (XMEMCMP(rc->serialNumber, cert->serial, rc->serialSz) == 0) { 00163 CYASSL_MSG("Cert revoked"); 00164 ret = CRL_CERT_REVOKED; 00165 break; 00166 } 00167 rc = rc->next; 00168 } 00169 } 00170 00171 UnLockMutex(&crl->crlLock); 00172 00173 if (foundEntry == 0) { 00174 CYASSL_MSG("Couldn't find CRL for status check"); 00175 ret = CRL_MISSING; 00176 if (crl->cm->cbMissingCRL) { 00177 char url[256]; 00178 00179 CYASSL_MSG("Issuing missing CRL callback"); 00180 url[0] = '\0'; 00181 if (cert->extCrlInfoSz < (int)sizeof(url) -1 ) { 00182 XMEMCPY(url, cert->extCrlInfo, cert->extCrlInfoSz); 00183 url[cert->extCrlInfoSz] = '\0'; 00184 } 00185 else { 00186 CYASSL_MSG("CRL url too long"); 00187 } 00188 crl->cm->cbMissingCRL(url); 00189 } 00190 } 00191 00192 00193 return ret; 00194 } 00195 00196 00197 /* Add Decoded CRL, 0 on success */ 00198 static int AddCRL(CYASSL_CRL* crl, DecodedCRL* dcrl) 00199 { 00200 CRL_Entry* crle; 00201 00202 CYASSL_ENTER("AddCRL"); 00203 00204 crle = (CRL_Entry*)XMALLOC(sizeof(CRL_Entry), NULL, DYNAMIC_TYPE_CRL_ENTRY); 00205 if (crle == NULL) { 00206 CYASSL_MSG("alloc CRL Entry failed"); 00207 return -1; 00208 } 00209 00210 if (InitCRL_Entry(crle, dcrl) < 0) { 00211 CYASSL_MSG("Init CRL Entry failed"); 00212 XFREE(crle, NULL, DYNAMIC_TYPE_CRL_ENTRY); 00213 return -1; 00214 } 00215 00216 if (LockMutex(&crl->crlLock) != 0) { 00217 CYASSL_MSG("LockMutex failed"); 00218 FreeCRL_Entry(crle); 00219 XFREE(crle, NULL, DYNAMIC_TYPE_CRL_ENTRY); 00220 return BAD_MUTEX_ERROR; 00221 } 00222 crle->next = crl->crlList; 00223 crl->crlList = crle; 00224 UnLockMutex(&crl->crlLock); 00225 00226 return 0; 00227 } 00228 00229 00230 /* Load CRL File of type, SSL_SUCCESS on ok */ 00231 int BufferLoadCRL(CYASSL_CRL* crl, const byte* buff, long sz, int type) 00232 { 00233 int ret = SSL_SUCCESS; 00234 const byte* myBuffer = buff; /* if DER ok, otherwise switch */ 00235 buffer der; 00236 DecodedCRL dcrl; 00237 00238 der.buffer = NULL; 00239 00240 CYASSL_ENTER("BufferLoadCRL"); 00241 00242 if (crl == NULL || buff == NULL || sz == 0) 00243 return BAD_FUNC_ARG; 00244 00245 if (type == SSL_FILETYPE_PEM) { 00246 int eccKey = 0; /* not used */ 00247 EncryptedInfo info; 00248 info.ctx = NULL; 00249 00250 ret = PemToDer(buff, sz, CRL_TYPE, &der, NULL, &info, &eccKey); 00251 if (ret == 0) { 00252 myBuffer = der.buffer; 00253 sz = der.length; 00254 } 00255 else { 00256 CYASSL_MSG("Pem to Der failed"); 00257 return -1; 00258 } 00259 } 00260 00261 InitDecodedCRL(&dcrl); 00262 ret = ParseCRL(&dcrl, myBuffer, (word32)sz, crl->cm); 00263 if (ret != 0) { 00264 CYASSL_MSG("ParseCRL error"); 00265 } 00266 else { 00267 ret = AddCRL(crl, &dcrl); 00268 if (ret != 0) { 00269 CYASSL_MSG("AddCRL error"); 00270 } 00271 } 00272 FreeDecodedCRL(&dcrl); 00273 00274 if (der.buffer) 00275 XFREE(der.buffer, NULL, DYNAMIC_TYPE_CRL); 00276 00277 if (ret == 0) 00278 return SSL_SUCCESS; /* convert */ 00279 return ret; 00280 } 00281 00282 00283 #ifdef HAVE_CRL_MONITOR 00284 00285 00286 /* read in new CRL entries and save new list */ 00287 static int SwapLists(CYASSL_CRL* crl) 00288 { 00289 int ret; 00290 CYASSL_CRL tmp; 00291 CRL_Entry* newList; 00292 00293 if (InitCRL(&tmp, crl->cm) < 0) { 00294 CYASSL_MSG("Init tmp CRL failed"); 00295 return -1; 00296 } 00297 00298 if (crl->monitors[0].path) { 00299 ret = LoadCRL(&tmp, crl->monitors[0].path, SSL_FILETYPE_PEM, 0); 00300 if (ret != SSL_SUCCESS) { 00301 CYASSL_MSG("PEM LoadCRL on dir change failed"); 00302 FreeCRL(&tmp, 0); 00303 return -1; 00304 } 00305 } 00306 00307 if (crl->monitors[1].path) { 00308 ret = LoadCRL(&tmp, crl->monitors[1].path, SSL_FILETYPE_ASN1, 0); 00309 if (ret != SSL_SUCCESS) { 00310 CYASSL_MSG("DER LoadCRL on dir change failed"); 00311 FreeCRL(&tmp, 0); 00312 return -1; 00313 } 00314 } 00315 00316 if (LockMutex(&crl->crlLock) != 0) { 00317 CYASSL_MSG("LockMutex failed"); 00318 FreeCRL(&tmp, 0); 00319 return -1; 00320 } 00321 00322 newList = tmp.crlList; 00323 00324 /* swap lists */ 00325 tmp.crlList = crl->crlList; 00326 crl->crlList = newList; 00327 00328 UnLockMutex(&crl->crlLock); 00329 00330 FreeCRL(&tmp, 0); 00331 00332 return 0; 00333 } 00334 00335 00336 #if (defined(__MACH__) || defined(__FreeBSD__)) 00337 00338 #include <sys/types.h> 00339 #include <sys/event.h> 00340 #include <sys/time.h> 00341 #include <fcntl.h> 00342 00343 #ifdef __MACH__ 00344 #define XEVENT_MODE O_EVTONLY 00345 #elif defined(__FreeBSD__) 00346 #define XEVENT_MODE EVFILT_VNODE 00347 #endif 00348 00349 00350 /* OS X monitoring */ 00351 static void* DoMonitor(void* arg) 00352 { 00353 int fPEM, fDER, kq; 00354 struct kevent change; 00355 00356 CYASSL_CRL* crl = (CYASSL_CRL*)arg; 00357 00358 CYASSL_ENTER("DoMonitor"); 00359 00360 kq = kqueue(); 00361 if (kq == -1) { 00362 CYASSL_MSG("kqueue failed"); 00363 return NULL; 00364 } 00365 00366 fPEM = -1; 00367 fDER = -1; 00368 00369 if (crl->monitors[0].path) { 00370 fPEM = open(crl->monitors[0].path, XEVENT_MODE); 00371 if (fPEM == -1) { 00372 CYASSL_MSG("PEM event dir open failed"); 00373 return NULL; 00374 } 00375 } 00376 00377 if (crl->monitors[1].path) { 00378 fDER = open(crl->monitors[1].path, XEVENT_MODE); 00379 if (fDER == -1) { 00380 CYASSL_MSG("DER event dir open failed"); 00381 return NULL; 00382 } 00383 } 00384 00385 if (fPEM != -1) 00386 EV_SET(&change, fPEM, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_ONESHOT, 00387 NOTE_DELETE | NOTE_EXTEND | NOTE_WRITE | NOTE_ATTRIB, 0, 0); 00388 00389 if (fDER != -1) 00390 EV_SET(&change, fDER, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_ONESHOT, 00391 NOTE_DELETE | NOTE_EXTEND | NOTE_WRITE | NOTE_ATTRIB, 0, 0); 00392 00393 for (;;) { 00394 struct kevent event; 00395 int numEvents = kevent(kq, &change, 1, &event, 1, NULL); 00396 00397 CYASSL_MSG("Got kevent"); 00398 00399 if (numEvents == -1) { 00400 CYASSL_MSG("kevent problem, continue"); 00401 continue; 00402 } 00403 00404 if (SwapLists(crl) < 0) { 00405 CYASSL_MSG("SwapLists problem, continue"); 00406 } 00407 } 00408 00409 return NULL; 00410 } 00411 00412 00413 #elif defined(__linux__) 00414 00415 #include <sys/types.h> 00416 #include <sys/inotify.h> 00417 #include <unistd.h> 00418 00419 /* linux monitoring */ 00420 static void* DoMonitor(void* arg) 00421 { 00422 int notifyFd; 00423 int wd; 00424 CYASSL_CRL* crl = (CYASSL_CRL*)arg; 00425 00426 CYASSL_ENTER("DoMonitor"); 00427 00428 notifyFd = inotify_init(); 00429 if (notifyFd < 0) { 00430 CYASSL_MSG("inotify failed"); 00431 return NULL; 00432 } 00433 00434 if (crl->monitors[0].path) { 00435 wd = inotify_add_watch(notifyFd, crl->monitors[0].path, IN_CLOSE_WRITE | 00436 IN_DELETE); 00437 if (wd < 0) { 00438 CYASSL_MSG("PEM notify add watch failed"); 00439 return NULL; 00440 } 00441 } 00442 00443 if (crl->monitors[1].path) { 00444 wd = inotify_add_watch(notifyFd, crl->monitors[1].path, IN_CLOSE_WRITE | 00445 IN_DELETE); 00446 if (wd < 0) { 00447 CYASSL_MSG("DER notify add watch failed"); 00448 return NULL; 00449 } 00450 } 00451 00452 for (;;) { 00453 char buff[8192]; 00454 int length = read(notifyFd, buff, sizeof(buff)); 00455 00456 CYASSL_MSG("Got notify event"); 00457 00458 if (length < 0) { 00459 CYASSL_MSG("notify read problem, continue"); 00460 continue; 00461 } 00462 00463 if (SwapLists(crl) < 0) { 00464 CYASSL_MSG("SwapLists problem, continue"); 00465 } 00466 } 00467 00468 return NULL; 00469 } 00470 00471 00472 #else 00473 00474 #error "CRL monitor only currently supported on linux or mach" 00475 00476 #endif /* MACH or linux */ 00477 00478 00479 /* Start Monitoring the CRL path(s) in a thread */ 00480 static int StartMonitorCRL(CYASSL_CRL* crl) 00481 { 00482 pthread_attr_t attr; 00483 00484 CYASSL_ENTER("StartMonitorCRL"); 00485 00486 if (crl == NULL) 00487 return BAD_FUNC_ARG; 00488 00489 if (crl->tid != 0) { 00490 CYASSL_MSG("Monitor thread already running"); 00491 return MONITOR_RUNNING_E; 00492 } 00493 00494 pthread_attr_init(&attr); 00495 00496 if (pthread_create(&crl->tid, &attr, DoMonitor, crl) != 0) { 00497 CYASSL_MSG("Thread creation error"); 00498 return THREAD_CREATE_E; 00499 } 00500 00501 return SSL_SUCCESS; 00502 } 00503 00504 00505 #else /* HAVE_CRL_MONITOR */ 00506 00507 static int StartMonitorCRL(CYASSL_CRL* crl) 00508 { 00509 (void)crl; 00510 00511 CYASSL_ENTER("StartMonitorCRL"); 00512 CYASSL_MSG("Not compiled in"); 00513 00514 return NOT_COMPILED_IN; 00515 } 00516 00517 #endif /* HAVE_CRL_MONITOR */ 00518 00519 00520 /* Load CRL path files of type, SSL_SUCCESS on ok */ 00521 int LoadCRL(CYASSL_CRL* crl, const char* path, int type, int monitor) 00522 { 00523 struct dirent* entry; 00524 DIR* dir; 00525 int ret = SSL_SUCCESS; 00526 00527 CYASSL_ENTER("LoadCRL"); 00528 if (crl == NULL) 00529 return BAD_FUNC_ARG; 00530 00531 dir = opendir(path); 00532 if (dir == NULL) { 00533 CYASSL_MSG("opendir path crl load failed"); 00534 return BAD_PATH_ERROR; 00535 } 00536 while ( (entry = readdir(dir)) != NULL) { 00537 char name[MAX_FILENAME_SZ]; 00538 struct stat s; 00539 00540 XMEMSET(name, 0, sizeof(name)); 00541 XSTRNCPY(name, path, MAX_FILENAME_SZ/2 - 2); 00542 XSTRNCAT(name, "/", 1); 00543 XSTRNCAT(name, entry->d_name, MAX_FILENAME_SZ/2); 00544 00545 if (stat(name, &s) != 0) { 00546 CYASSL_MSG("stat on name failed"); 00547 continue; 00548 } 00549 if (s.st_mode & S_IFREG) { 00550 00551 if (type == SSL_FILETYPE_PEM) { 00552 if (strstr(entry->d_name, ".pem") == NULL) { 00553 CYASSL_MSG("not .pem file, skipping"); 00554 continue; 00555 } 00556 } 00557 else { 00558 if (strstr(entry->d_name, ".der") == NULL && 00559 strstr(entry->d_name, ".crl") == NULL) { 00560 00561 CYASSL_MSG("not .der or .crl file, skipping"); 00562 continue; 00563 } 00564 } 00565 00566 if (ProcessFile(NULL, name, type, CRL_TYPE, NULL, 0, crl) 00567 != SSL_SUCCESS) { 00568 CYASSL_MSG("CRL file load failed, continuing"); 00569 } 00570 } 00571 } 00572 00573 if (monitor & CYASSL_CRL_MONITOR) { 00574 CYASSL_MSG("monitor path requested"); 00575 00576 if (type == SSL_FILETYPE_PEM) { 00577 crl->monitors[0].path = strdup(path); 00578 crl->monitors[0].type = SSL_FILETYPE_PEM; 00579 if (crl->monitors[0].path == NULL) 00580 ret = MEMORY_E; 00581 } else { 00582 crl->monitors[1].path = strdup(path); 00583 crl->monitors[1].type = SSL_FILETYPE_ASN1; 00584 if (crl->monitors[1].path == NULL) 00585 ret = MEMORY_E; 00586 } 00587 00588 if (monitor & CYASSL_CRL_START_MON) { 00589 CYASSL_MSG("start monitoring requested"); 00590 00591 ret = StartMonitorCRL(crl); 00592 } 00593 } 00594 00595 closedir(dir); 00596 00597 return ret; 00598 } 00599 00600 #endif /* HAVE_CRL */
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