wolf SSL
SSL/TLS Library
CyaSSL is SSL/TLS library for embedded systems.
Diff: src/crl.c
- Revision:
- 0:9d17e4342598
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/crl.c Sun Apr 20 12:40:57 2014 +0000
@@ -0,0 +1,600 @@
+/* crl.c
+ *
+ * Copyright (C) 2006-2013 wolfSSL Inc.
+ *
+ * This file is part of CyaSSL.
+ *
+ * CyaSSL is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * CyaSSL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#ifdef HAVE_CONFIG_H
+ #include <config.h>
+#endif
+
+#include <cyassl/ctaocrypt/settings.h>
+
+#ifdef HAVE_CRL
+
+#include <cyassl/internal.h>
+#include <cyassl/error-ssl.h>
+
+#include <dirent.h>
+#include <sys/stat.h>
+#include <string.h>
+
+
+/* Initialze CRL members */
+int InitCRL(CYASSL_CRL* crl, CYASSL_CERT_MANAGER* cm)
+{
+ CYASSL_ENTER("InitCRL");
+
+ crl->cm = cm;
+ crl->crlList = NULL;
+ crl->monitors[0].path = NULL;
+ crl->monitors[1].path = NULL;
+#ifdef HAVE_CRL_MONITOR
+ crl->tid = 0;
+#endif
+ if (InitMutex(&crl->crlLock) != 0)
+ return BAD_MUTEX_E;
+
+ return 0;
+}
+
+
+/* Initialze CRL Entry */
+static int InitCRL_Entry(CRL_Entry* crle, DecodedCRL* dcrl)
+{
+ CYASSL_ENTER("InitCRL_Entry");
+
+ XMEMCPY(crle->issuerHash, dcrl->issuerHash, SHA_DIGEST_SIZE);
+ /* XMEMCPY(crle->crlHash, dcrl->crlHash, SHA_DIGEST_SIZE);
+ * copy the hash here if needed for optimized comparisons */
+ XMEMCPY(crle->lastDate, dcrl->lastDate, MAX_DATE_SIZE);
+ XMEMCPY(crle->nextDate, dcrl->nextDate, MAX_DATE_SIZE);
+ crle->lastDateFormat = dcrl->lastDateFormat;
+ crle->nextDateFormat = dcrl->nextDateFormat;
+
+ crle->certs = dcrl->certs; /* take ownsership */
+ dcrl->certs = NULL;
+ crle->totalCerts = dcrl->totalCerts;
+
+ return 0;
+}
+
+
+/* Free all CRL Entry resources */
+static void FreeCRL_Entry(CRL_Entry* crle)
+{
+ RevokedCert* tmp = crle->certs;
+
+ CYASSL_ENTER("FreeCRL_Entry");
+
+ while(tmp) {
+ RevokedCert* next = tmp->next;
+ XFREE(tmp, NULL, DYNAMIC_TYPE_REVOKED);
+ tmp = next;
+ }
+}
+
+
+
+/* Free all CRL resources */
+void FreeCRL(CYASSL_CRL* crl, int dynamic)
+{
+ CRL_Entry* tmp = crl->crlList;
+
+ CYASSL_ENTER("FreeCRL");
+
+ if (crl->monitors[0].path)
+ XFREE(crl->monitors[0].path, NULL, DYNAMIC_TYPE_CRL_MONITOR);
+
+ if (crl->monitors[1].path)
+ XFREE(crl->monitors[1].path, NULL, DYNAMIC_TYPE_CRL_MONITOR);
+
+ while(tmp) {
+ CRL_Entry* next = tmp->next;
+ FreeCRL_Entry(tmp);
+ XFREE(tmp, NULL, DYNAMIC_TYPE_CRL_ENTRY);
+ tmp = next;
+ }
+
+#ifdef HAVE_CRL_MONITOR
+ if (crl->tid != 0) {
+ CYASSL_MSG("Canceling monitor thread");
+ pthread_cancel(crl->tid);
+ }
+#endif
+ FreeMutex(&crl->crlLock);
+ if (dynamic) /* free self */
+ XFREE(crl, NULL, DYNAMIC_TYPE_CRL);
+}
+
+
+/* Is the cert ok with CRL, return 0 on success */
+int CheckCertCRL(CYASSL_CRL* crl, DecodedCert* cert)
+{
+ CRL_Entry* crle;
+ int foundEntry = 0;
+ int ret = 0;
+
+ CYASSL_ENTER("CheckCertCRL");
+
+ if (LockMutex(&crl->crlLock) != 0) {
+ CYASSL_MSG("LockMutex failed");
+ return BAD_MUTEX_E;
+ }
+
+ crle = crl->crlList;
+
+ while (crle) {
+ if (XMEMCMP(crle->issuerHash, cert->issuerHash, SHA_DIGEST_SIZE) == 0) {
+ CYASSL_MSG("Found CRL Entry on list");
+ CYASSL_MSG("Checking next date validity");
+
+ if (!ValidateDate(crle->nextDate, crle->nextDateFormat, AFTER)) {
+ CYASSL_MSG("CRL next date is no longer valid");
+ ret = ASN_AFTER_DATE_E;
+ }
+ else
+ foundEntry = 1;
+ break;
+ }
+ crle = crle->next;
+ }
+
+ if (foundEntry) {
+ RevokedCert* rc = crle->certs;
+
+ while (rc) {
+ if (XMEMCMP(rc->serialNumber, cert->serial, rc->serialSz) == 0) {
+ CYASSL_MSG("Cert revoked");
+ ret = CRL_CERT_REVOKED;
+ break;
+ }
+ rc = rc->next;
+ }
+ }
+
+ UnLockMutex(&crl->crlLock);
+
+ if (foundEntry == 0) {
+ CYASSL_MSG("Couldn't find CRL for status check");
+ ret = CRL_MISSING;
+ if (crl->cm->cbMissingCRL) {
+ char url[256];
+
+ CYASSL_MSG("Issuing missing CRL callback");
+ url[0] = '\0';
+ if (cert->extCrlInfoSz < (int)sizeof(url) -1 ) {
+ XMEMCPY(url, cert->extCrlInfo, cert->extCrlInfoSz);
+ url[cert->extCrlInfoSz] = '\0';
+ }
+ else {
+ CYASSL_MSG("CRL url too long");
+ }
+ crl->cm->cbMissingCRL(url);
+ }
+ }
+
+
+ return ret;
+}
+
+
+/* Add Decoded CRL, 0 on success */
+static int AddCRL(CYASSL_CRL* crl, DecodedCRL* dcrl)
+{
+ CRL_Entry* crle;
+
+ CYASSL_ENTER("AddCRL");
+
+ crle = (CRL_Entry*)XMALLOC(sizeof(CRL_Entry), NULL, DYNAMIC_TYPE_CRL_ENTRY);
+ if (crle == NULL) {
+ CYASSL_MSG("alloc CRL Entry failed");
+ return -1;
+ }
+
+ if (InitCRL_Entry(crle, dcrl) < 0) {
+ CYASSL_MSG("Init CRL Entry failed");
+ XFREE(crle, NULL, DYNAMIC_TYPE_CRL_ENTRY);
+ return -1;
+ }
+
+ if (LockMutex(&crl->crlLock) != 0) {
+ CYASSL_MSG("LockMutex failed");
+ FreeCRL_Entry(crle);
+ XFREE(crle, NULL, DYNAMIC_TYPE_CRL_ENTRY);
+ return BAD_MUTEX_E;
+ }
+ crle->next = crl->crlList;
+ crl->crlList = crle;
+ UnLockMutex(&crl->crlLock);
+
+ return 0;
+}
+
+
+/* Load CRL File of type, SSL_SUCCESS on ok */
+int BufferLoadCRL(CYASSL_CRL* crl, const byte* buff, long sz, int type)
+{
+ int ret = SSL_SUCCESS;
+ const byte* myBuffer = buff; /* if DER ok, otherwise switch */
+ buffer der;
+ DecodedCRL dcrl;
+
+ der.buffer = NULL;
+
+ CYASSL_ENTER("BufferLoadCRL");
+
+ if (crl == NULL || buff == NULL || sz == 0)
+ return BAD_FUNC_ARG;
+
+ if (type == SSL_FILETYPE_PEM) {
+ int eccKey = 0; /* not used */
+ EncryptedInfo info;
+ info.ctx = NULL;
+
+ ret = PemToDer(buff, sz, CRL_TYPE, &der, NULL, &info, &eccKey);
+ if (ret == 0) {
+ myBuffer = der.buffer;
+ sz = der.length;
+ }
+ else {
+ CYASSL_MSG("Pem to Der failed");
+ return -1;
+ }
+ }
+
+ InitDecodedCRL(&dcrl);
+ ret = ParseCRL(&dcrl, myBuffer, (word32)sz, crl->cm);
+ if (ret != 0) {
+ CYASSL_MSG("ParseCRL error");
+ }
+ else {
+ ret = AddCRL(crl, &dcrl);
+ if (ret != 0) {
+ CYASSL_MSG("AddCRL error");
+ }
+ }
+ FreeDecodedCRL(&dcrl);
+
+ if (der.buffer)
+ XFREE(der.buffer, NULL, DYNAMIC_TYPE_CRL);
+
+ if (ret == 0)
+ return SSL_SUCCESS; /* convert */
+ return ret;
+}
+
+
+#ifdef HAVE_CRL_MONITOR
+
+
+/* read in new CRL entries and save new list */
+static int SwapLists(CYASSL_CRL* crl)
+{
+ int ret;
+ CYASSL_CRL tmp;
+ CRL_Entry* newList;
+
+ if (InitCRL(&tmp, crl->cm) < 0) {
+ CYASSL_MSG("Init tmp CRL failed");
+ return -1;
+ }
+
+ if (crl->monitors[0].path) {
+ ret = LoadCRL(&tmp, crl->monitors[0].path, SSL_FILETYPE_PEM, 0);
+ if (ret != SSL_SUCCESS) {
+ CYASSL_MSG("PEM LoadCRL on dir change failed");
+ FreeCRL(&tmp, 0);
+ return -1;
+ }
+ }
+
+ if (crl->monitors[1].path) {
+ ret = LoadCRL(&tmp, crl->monitors[1].path, SSL_FILETYPE_ASN1, 0);
+ if (ret != SSL_SUCCESS) {
+ CYASSL_MSG("DER LoadCRL on dir change failed");
+ FreeCRL(&tmp, 0);
+ return -1;
+ }
+ }
+
+ if (LockMutex(&crl->crlLock) != 0) {
+ CYASSL_MSG("LockMutex failed");
+ FreeCRL(&tmp, 0);
+ return -1;
+ }
+
+ newList = tmp.crlList;
+
+ /* swap lists */
+ tmp.crlList = crl->crlList;
+ crl->crlList = newList;
+
+ UnLockMutex(&crl->crlLock);
+
+ FreeCRL(&tmp, 0);
+
+ return 0;
+}
+
+
+#if (defined(__MACH__) || defined(__FreeBSD__))
+
+#include <sys/types.h>
+#include <sys/event.h>
+#include <sys/time.h>
+#include <fcntl.h>
+
+#ifdef __MACH__
+ #define XEVENT_MODE O_EVTONLY
+#elif defined(__FreeBSD__)
+ #define XEVENT_MODE EVFILT_VNODE
+#endif
+
+
+/* OS X monitoring */
+static void* DoMonitor(void* arg)
+{
+ int fPEM, fDER, kq;
+ struct kevent change;
+
+ CYASSL_CRL* crl = (CYASSL_CRL*)arg;
+
+ CYASSL_ENTER("DoMonitor");
+
+ kq = kqueue();
+ if (kq == -1) {
+ CYASSL_MSG("kqueue failed");
+ return NULL;
+ }
+
+ fPEM = -1;
+ fDER = -1;
+
+ if (crl->monitors[0].path) {
+ fPEM = open(crl->monitors[0].path, XEVENT_MODE);
+ if (fPEM == -1) {
+ CYASSL_MSG("PEM event dir open failed");
+ return NULL;
+ }
+ }
+
+ if (crl->monitors[1].path) {
+ fDER = open(crl->monitors[1].path, XEVENT_MODE);
+ if (fDER == -1) {
+ CYASSL_MSG("DER event dir open failed");
+ return NULL;
+ }
+ }
+
+ if (fPEM != -1)
+ EV_SET(&change, fPEM, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_ONESHOT,
+ NOTE_DELETE | NOTE_EXTEND | NOTE_WRITE | NOTE_ATTRIB, 0, 0);
+
+ if (fDER != -1)
+ EV_SET(&change, fDER, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_ONESHOT,
+ NOTE_DELETE | NOTE_EXTEND | NOTE_WRITE | NOTE_ATTRIB, 0, 0);
+
+ for (;;) {
+ struct kevent event;
+ int numEvents = kevent(kq, &change, 1, &event, 1, NULL);
+
+ CYASSL_MSG("Got kevent");
+
+ if (numEvents == -1) {
+ CYASSL_MSG("kevent problem, continue");
+ continue;
+ }
+
+ if (SwapLists(crl) < 0) {
+ CYASSL_MSG("SwapLists problem, continue");
+ }
+ }
+
+ return NULL;
+}
+
+
+#elif defined(__linux__)
+
+#include <sys/types.h>
+#include <sys/inotify.h>
+#include <unistd.h>
+
+/* linux monitoring */
+static void* DoMonitor(void* arg)
+{
+ int notifyFd;
+ int wd;
+ CYASSL_CRL* crl = (CYASSL_CRL*)arg;
+
+ CYASSL_ENTER("DoMonitor");
+
+ notifyFd = inotify_init();
+ if (notifyFd < 0) {
+ CYASSL_MSG("inotify failed");
+ return NULL;
+ }
+
+ if (crl->monitors[0].path) {
+ wd = inotify_add_watch(notifyFd, crl->monitors[0].path, IN_CLOSE_WRITE |
+ IN_DELETE);
+ if (wd < 0) {
+ CYASSL_MSG("PEM notify add watch failed");
+ return NULL;
+ }
+ }
+
+ if (crl->monitors[1].path) {
+ wd = inotify_add_watch(notifyFd, crl->monitors[1].path, IN_CLOSE_WRITE |
+ IN_DELETE);
+ if (wd < 0) {
+ CYASSL_MSG("DER notify add watch failed");
+ return NULL;
+ }
+ }
+
+ for (;;) {
+ char buff[8192];
+ int length = read(notifyFd, buff, sizeof(buff));
+
+ CYASSL_MSG("Got notify event");
+
+ if (length < 0) {
+ CYASSL_MSG("notify read problem, continue");
+ continue;
+ }
+
+ if (SwapLists(crl) < 0) {
+ CYASSL_MSG("SwapLists problem, continue");
+ }
+ }
+
+ return NULL;
+}
+
+
+#else
+
+#error "CRL monitor only currently supported on linux or mach"
+
+#endif /* MACH or linux */
+
+
+/* Start Monitoring the CRL path(s) in a thread */
+static int StartMonitorCRL(CYASSL_CRL* crl)
+{
+ pthread_attr_t attr;
+
+ CYASSL_ENTER("StartMonitorCRL");
+
+ if (crl == NULL)
+ return BAD_FUNC_ARG;
+
+ if (crl->tid != 0) {
+ CYASSL_MSG("Monitor thread already running");
+ return MONITOR_RUNNING_E;
+ }
+
+ pthread_attr_init(&attr);
+
+ if (pthread_create(&crl->tid, &attr, DoMonitor, crl) != 0) {
+ CYASSL_MSG("Thread creation error");
+ return THREAD_CREATE_E;
+ }
+
+ return SSL_SUCCESS;
+}
+
+
+#else /* HAVE_CRL_MONITOR */
+
+static int StartMonitorCRL(CYASSL_CRL* crl)
+{
+ (void)crl;
+
+ CYASSL_ENTER("StartMonitorCRL");
+ CYASSL_MSG("Not compiled in");
+
+ return NOT_COMPILED_IN;
+}
+
+#endif /* HAVE_CRL_MONITOR */
+
+
+/* Load CRL path files of type, SSL_SUCCESS on ok */
+int LoadCRL(CYASSL_CRL* crl, const char* path, int type, int monitor)
+{
+ struct dirent* entry;
+ DIR* dir;
+ int ret = SSL_SUCCESS;
+
+ CYASSL_ENTER("LoadCRL");
+ if (crl == NULL)
+ return BAD_FUNC_ARG;
+
+ dir = opendir(path);
+ if (dir == NULL) {
+ CYASSL_MSG("opendir path crl load failed");
+ return BAD_PATH_ERROR;
+ }
+ while ( (entry = readdir(dir)) != NULL) {
+ char name[MAX_FILENAME_SZ];
+ struct stat s;
+
+ XMEMSET(name, 0, sizeof(name));
+ XSTRNCPY(name, path, MAX_FILENAME_SZ/2 - 2);
+ XSTRNCAT(name, "/", 1);
+ XSTRNCAT(name, entry->d_name, MAX_FILENAME_SZ/2);
+
+ if (stat(name, &s) != 0) {
+ CYASSL_MSG("stat on name failed");
+ continue;
+ }
+ if (s.st_mode & S_IFREG) {
+
+ if (type == SSL_FILETYPE_PEM) {
+ if (strstr(entry->d_name, ".pem") == NULL) {
+ CYASSL_MSG("not .pem file, skipping");
+ continue;
+ }
+ }
+ else {
+ if (strstr(entry->d_name, ".der") == NULL &&
+ strstr(entry->d_name, ".crl") == NULL) {
+
+ CYASSL_MSG("not .der or .crl file, skipping");
+ continue;
+ }
+ }
+
+ if (ProcessFile(NULL, name, type, CRL_TYPE, NULL, 0, crl)
+ != SSL_SUCCESS) {
+ CYASSL_MSG("CRL file load failed, continuing");
+ }
+ }
+ }
+
+ if (monitor & CYASSL_CRL_MONITOR) {
+ CYASSL_MSG("monitor path requested");
+
+ if (type == SSL_FILETYPE_PEM) {
+ crl->monitors[0].path = strdup(path);
+ crl->monitors[0].type = SSL_FILETYPE_PEM;
+ if (crl->monitors[0].path == NULL)
+ ret = MEMORY_E;
+ } else {
+ crl->monitors[1].path = strdup(path);
+ crl->monitors[1].type = SSL_FILETYPE_ASN1;
+ if (crl->monitors[1].path == NULL)
+ ret = MEMORY_E;
+ }
+
+ if (monitor & CYASSL_CRL_START_MON) {
+ CYASSL_MSG("start monitoring requested");
+
+ ret = StartMonitorCRL(crl);
+ }
+ }
+
+ closedir(dir);
+
+ return ret;
+}
+
+#endif /* HAVE_CRL */