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- /* crl.c
- *
- * Copyright (C) 2006-2022 wolfSSL Inc.
- *
- * This file is part of wolfSSL.
- *
- * wolfSSL 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.
- *
- * wolfSSL 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
- */
- /* Name change compatibility layer no longer needs included here */
- #ifdef HAVE_CONFIG_H
- #include <config.h>
- #endif
- #include <wolfssl/wolfcrypt/settings.h>
- #ifndef WOLFCRYPT_ONLY
- #ifdef HAVE_CRL
- #include <wolfssl/internal.h>
- #include <wolfssl/error-ssl.h>
- #ifndef WOLFSSL_LINUXKM
- #include <string.h>
- #endif
- #ifdef HAVE_CRL_MONITOR
- #if (defined(__MACH__) || defined(__FreeBSD__) || defined(__linux__))
- static int StopMonitor(int mfd);
- #else
- #error "CRL monitor only currently supported on linux or mach"
- #endif
- #endif /* HAVE_CRL_MONITOR */
- /* Initialize CRL members */
- int InitCRL(WOLFSSL_CRL* crl, WOLFSSL_CERT_MANAGER* cm)
- {
- WOLFSSL_ENTER("InitCRL");
- if(cm != NULL)
- crl->heap = cm->heap;
- else
- crl->heap = NULL;
- crl->cm = cm;
- crl->crlList = NULL;
- crl->monitors[0].path = NULL;
- crl->monitors[1].path = NULL;
- #ifdef HAVE_CRL_MONITOR
- crl->tid = 0;
- crl->mfd = -1; /* mfd for bsd is kqueue fd, eventfd for linux */
- crl->setup = 0; /* thread setup done predicate */
- if (pthread_cond_init(&crl->cond, 0) != 0) {
- WOLFSSL_MSG("Pthread condition init failed");
- return BAD_COND_E;
- }
- #endif
- if (wc_InitMutex(&crl->crlLock) != 0) {
- WOLFSSL_MSG("Init Mutex failed");
- return BAD_MUTEX_E;
- }
- return 0;
- }
- /* Initialize CRL Entry */
- static int InitCRL_Entry(CRL_Entry* crle, DecodedCRL* dcrl, const byte* buff,
- int verified, void* heap)
- {
- WOLFSSL_ENTER("InitCRL_Entry");
- XMEMCPY(crle->issuerHash, dcrl->issuerHash, CRL_DIGEST_SIZE);
- /* XMEMCPY(crle->crlHash, dcrl->crlHash, CRL_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->version = dcrl->version;
- #if defined(OPENSSL_EXTRA)
- crle->issuer = NULL;
- wolfSSL_d2i_X509_NAME(&crle->issuer, (unsigned char**)&dcrl->issuer,
- dcrl->issuerSz);
- if (crle->issuer == NULL) {
- return WOLFSSL_FAILURE;
- }
- #endif
- crle->certs = dcrl->certs; /* take ownsership */
- dcrl->certs = NULL;
- crle->totalCerts = dcrl->totalCerts;
- crle->crlNumber = dcrl->crlNumber;
- crle->verified = verified;
- if (!verified) {
- crle->tbsSz = dcrl->sigIndex - dcrl->certBegin;
- crle->signatureSz = dcrl->sigLength;
- crle->signatureOID = dcrl->signatureOID;
- crle->toBeSigned = (byte*)XMALLOC(crle->tbsSz, heap,
- DYNAMIC_TYPE_CRL_ENTRY);
- if (crle->toBeSigned == NULL)
- return -1;
- crle->signature = (byte*)XMALLOC(crle->signatureSz, heap,
- DYNAMIC_TYPE_CRL_ENTRY);
- if (crle->signature == NULL) {
- XFREE(crle->toBeSigned, heap, DYNAMIC_TYPE_CRL_ENTRY);
- return -1;
- }
- XMEMCPY(crle->toBeSigned, buff + dcrl->certBegin, crle->tbsSz);
- XMEMCPY(crle->signature, dcrl->signature, crle->signatureSz);
- #ifndef NO_SKID
- crle->extAuthKeyIdSet = dcrl->extAuthKeyIdSet;
- if (crle->extAuthKeyIdSet)
- XMEMCPY(crle->extAuthKeyId, dcrl->extAuthKeyId, KEYID_SIZE);
- #endif
- }
- else {
- crle->toBeSigned = NULL;
- crle->signature = NULL;
- }
- (void)verified;
- (void)heap;
- return 0;
- }
- /* Free all CRL Entry resources */
- static void FreeCRL_Entry(CRL_Entry* crle, void* heap)
- {
- RevokedCert* tmp = crle->certs;
- RevokedCert* next;
- WOLFSSL_ENTER("FreeCRL_Entry");
- while (tmp) {
- next = tmp->next;
- XFREE(tmp, heap, DYNAMIC_TYPE_REVOKED);
- tmp = next;
- }
- if (crle->signature != NULL)
- XFREE(crle->signature, heap, DYNAMIC_TYPE_CRL_ENTRY);
- if (crle->toBeSigned != NULL)
- XFREE(crle->toBeSigned, heap, DYNAMIC_TYPE_CRL_ENTRY);
- #if defined(OPENSSL_EXTRA)
- if (crle->issuer != NULL) {
- FreeX509Name(crle->issuer);
- XFREE(crle->issuer, heap, DYNAMIC_TYPE_X509);
- }
- #endif
- (void)heap;
- }
- /* Free all CRL resources */
- void FreeCRL(WOLFSSL_CRL* crl, int dynamic)
- {
- CRL_Entry* tmp = crl->crlList;
- WOLFSSL_ENTER("FreeCRL");
- if (crl->monitors[0].path)
- XFREE(crl->monitors[0].path, crl->heap, DYNAMIC_TYPE_CRL_MONITOR);
- if (crl->monitors[1].path)
- XFREE(crl->monitors[1].path, crl->heap, DYNAMIC_TYPE_CRL_MONITOR);
- while(tmp) {
- CRL_Entry* next = tmp->next;
- FreeCRL_Entry(tmp, crl->heap);
- XFREE(tmp, crl->heap, DYNAMIC_TYPE_CRL_ENTRY);
- tmp = next;
- }
- #ifdef HAVE_CRL_MONITOR
- if (crl->tid != 0) {
- WOLFSSL_MSG("stopping monitor thread");
- if (StopMonitor(crl->mfd) == 0) {
- int _pthread_ret = pthread_join(crl->tid, NULL);
- if (_pthread_ret != 0)
- WOLFSSL_MSG("stop monitor failed in pthread_join");
- }
- else {
- WOLFSSL_MSG("stop monitor failed");
- }
- }
- {
- int _pthread_ret = pthread_cond_destroy(&crl->cond);
- if (_pthread_ret != 0)
- WOLFSSL_MSG("pthread_cond_destroy failed in FreeCRL()");
- }
- #endif
- wc_FreeMutex(&crl->crlLock);
- if (dynamic) /* free self */
- XFREE(crl, crl->heap, DYNAMIC_TYPE_CRL);
- }
- static int CheckCertCRLList(WOLFSSL_CRL* crl, DecodedCert* cert, int *pFoundEntry)
- {
- CRL_Entry* crle;
- int foundEntry = 0;
- int ret = 0;
- if (wc_LockMutex(&crl->crlLock) != 0) {
- WOLFSSL_MSG("wc_LockMutex failed");
- return BAD_MUTEX_E;
- }
- crle = crl->crlList;
- while (crle) {
- if (XMEMCMP(crle->issuerHash, cert->issuerHash, CRL_DIGEST_SIZE) == 0) {
- WOLFSSL_MSG("Found CRL Entry on list");
- if (crle->verified == 0) {
- Signer* ca = NULL;
- #ifndef NO_SKID
- byte extAuthKeyId[KEYID_SIZE];
- #endif
- byte issuerHash[CRL_DIGEST_SIZE];
- byte* tbs;
- word32 tbsSz = crle->tbsSz;
- byte* sig = NULL;
- word32 sigSz = crle->signatureSz;
- word32 sigOID = crle->signatureOID;
- SignatureCtx sigCtx;
- tbs = (byte*)XMALLOC(tbsSz, crl->heap, DYNAMIC_TYPE_CRL_ENTRY);
- if (tbs == NULL) {
- wc_UnLockMutex(&crl->crlLock);
- return MEMORY_E;
- }
- sig = (byte*)XMALLOC(sigSz, crl->heap, DYNAMIC_TYPE_CRL_ENTRY);
- if (sig == NULL) {
- XFREE(tbs, crl->heap, DYNAMIC_TYPE_CRL_ENTRY);
- wc_UnLockMutex(&crl->crlLock);
- return MEMORY_E;
- }
- XMEMCPY(tbs, crle->toBeSigned, tbsSz);
- XMEMCPY(sig, crle->signature, sigSz);
- #ifndef NO_SKID
- XMEMCPY(extAuthKeyId, crle->extAuthKeyId,
- sizeof(extAuthKeyId));
- #endif
- XMEMCPY(issuerHash, crle->issuerHash, sizeof(issuerHash));
- wc_UnLockMutex(&crl->crlLock);
- #ifndef NO_SKID
- if (crle->extAuthKeyIdSet)
- ca = GetCA(crl->cm, extAuthKeyId);
- if (ca == NULL)
- ca = GetCAByName(crl->cm, issuerHash);
- #else /* NO_SKID */
- ca = GetCA(crl->cm, issuerHash);
- #endif /* NO_SKID */
- if (ca == NULL) {
- XFREE(sig, crl->heap, DYNAMIC_TYPE_CRL_ENTRY);
- XFREE(tbs, crl->heap, DYNAMIC_TYPE_CRL_ENTRY);
- WOLFSSL_MSG("Did NOT find CRL issuer CA");
- return ASN_CRL_NO_SIGNER_E;
- }
- ret = VerifyCRL_Signature(&sigCtx, tbs, tbsSz, sig, sigSz,
- sigOID, ca, crl->heap);
- XFREE(sig, crl->heap, DYNAMIC_TYPE_CRL_ENTRY);
- XFREE(tbs, crl->heap, DYNAMIC_TYPE_CRL_ENTRY);
- if (wc_LockMutex(&crl->crlLock) != 0) {
- WOLFSSL_MSG("wc_LockMutex failed");
- return BAD_MUTEX_E;
- }
- crle = crl->crlList;
- while (crle) {
- if (XMEMCMP(crle->issuerHash, cert->issuerHash,
- CRL_DIGEST_SIZE) == 0) {
- if (ret == 0)
- crle->verified = 1;
- else
- crle->verified = ret;
- XFREE(crle->toBeSigned, crl->heap,
- DYNAMIC_TYPE_CRL_ENTRY);
- crle->toBeSigned = NULL;
- XFREE(crle->signature, crl->heap,
- DYNAMIC_TYPE_CRL_ENTRY);
- crle->signature = NULL;
- break;
- }
- crle = crle->next;
- }
- if (crle == NULL || crle->verified < 0)
- break;
- }
- else if (crle->verified < 0) {
- WOLFSSL_MSG("Cannot use CRL as it didn't verify");
- ret = crle->verified;
- break;
- }
- WOLFSSL_MSG("Checking next date validity");
- #ifdef WOLFSSL_NO_CRL_NEXT_DATE
- if (crle->nextDateFormat != ASN_OTHER_TYPE)
- #endif
- {
- #ifndef NO_ASN_TIME
- if (!XVALIDATE_DATE(crle->nextDate,crle->nextDateFormat, AFTER)) {
- WOLFSSL_MSG("CRL next date is no longer valid");
- ret = ASN_AFTER_DATE_E;
- }
- #endif
- }
- if (ret == 0) {
- foundEntry = 1;
- }
- break;
- }
- crle = crle->next;
- }
- if (foundEntry) {
- RevokedCert* rc = crle->certs;
- while (rc) {
- if (rc->serialSz == cert->serialSz &&
- XMEMCMP(rc->serialNumber, cert->serial, rc->serialSz) == 0) {
- WOLFSSL_MSG("Cert revoked");
- ret = CRL_CERT_REVOKED;
- break;
- }
- rc = rc->next;
- }
- }
- wc_UnLockMutex(&crl->crlLock);
- *pFoundEntry = foundEntry;
- return ret;
- }
- /* Is the cert ok with CRL, return 0 on success */
- int CheckCertCRL(WOLFSSL_CRL* crl, DecodedCert* cert)
- {
- int foundEntry = 0;
- int ret = 0;
- WOLFSSL_ENTER("CheckCertCRL");
- #ifdef WOLFSSL_CRL_ALLOW_MISSING_CDP
- /* Skip CRL verification in case no CDP in peer cert */
- if (!cert->extCrlInfo) {
- return ret;
- }
- #endif
- ret = CheckCertCRLList(crl, cert, &foundEntry);
- #ifdef HAVE_CRL_IO
- if (foundEntry == 0) {
- /* perform embedded lookup */
- if (crl->crlIOCb) {
- ret = crl->crlIOCb(crl, (const char*)cert->extCrlInfo,
- cert->extCrlInfoSz);
- if (ret == WOLFSSL_CBIO_ERR_WANT_READ) {
- ret = OCSP_WANT_READ;
- }
- else if (ret >= 0) {
- /* try again */
- ret = CheckCertCRLList(crl, cert, &foundEntry);
- }
- }
- }
- #endif
- #if defined(OPENSSL_ALL) && defined(WOLFSSL_CERT_GEN) && \
- (defined(WOLFSSL_CERT_REQ) || defined(WOLFSSL_CERT_EXT)) && \
- !defined(NO_FILESYSTEM) && !defined(NO_WOLFSSL_DIR)
- /* if not find entry in the CRL list, it looks at the folder that sets */
- /* by LOOKUP_ctrl because user would want to use hash_dir. */
- /* Loading <issuer-hash>.rN form CRL file if find at the folder, */
- /* and try again checking Cert in the CRL list. */
- /* When not set the folder or not use hash_dir, do nothing. */
- if ((foundEntry == 0) && (ret != OCSP_WANT_READ)) {
- if (crl->cm->x509_store_p != NULL) {
- ret = LoadCertByIssuer(crl->cm->x509_store_p,
- (WOLFSSL_X509_NAME*)cert->issuerName, X509_LU_CRL);
- if (ret == WOLFSSL_SUCCESS) {
- /* try again */
- ret = CheckCertCRLList(crl, cert, &foundEntry);
- }
- }
- }
- #endif
- if (foundEntry == 0) {
- WOLFSSL_MSG("Couldn't find CRL for status check");
- if (ret != CRL_CERT_DATE_ERR) {
- ret = CRL_MISSING;
- }
- if (crl->cm->cbMissingCRL) {
- char url[256];
- WOLFSSL_MSG("Issuing missing CRL callback");
- url[0] = '\0';
- if (cert->extCrlInfo) {
- if (cert->extCrlInfoSz < (int)sizeof(url) -1 ) {
- XMEMCPY(url, cert->extCrlInfo, cert->extCrlInfoSz);
- url[cert->extCrlInfoSz] = '\0';
- }
- else {
- WOLFSSL_MSG("CRL url too long");
- }
- }
- crl->cm->cbMissingCRL(url);
- }
- }
- return ret;
- }
- /* Add Decoded CRL, 0 on success */
- static int AddCRL(WOLFSSL_CRL* crl, DecodedCRL* dcrl, const byte* buff,
- int verified)
- {
- CRL_Entry* crle;
- WOLFSSL_ENTER("AddCRL");
- crle = (CRL_Entry*)XMALLOC(sizeof(CRL_Entry), crl->heap, DYNAMIC_TYPE_CRL_ENTRY);
- if (crle == NULL) {
- WOLFSSL_MSG("alloc CRL Entry failed");
- return -1;
- }
- if (InitCRL_Entry(crle, dcrl, buff, verified, crl->heap) < 0) {
- WOLFSSL_MSG("Init CRL Entry failed");
- XFREE(crle, crl->heap, DYNAMIC_TYPE_CRL_ENTRY);
- return -1;
- }
- if (wc_LockMutex(&crl->crlLock) != 0) {
- WOLFSSL_MSG("wc_LockMutex failed");
- FreeCRL_Entry(crle, crl->heap);
- XFREE(crle, crl->heap, DYNAMIC_TYPE_CRL_ENTRY);
- return BAD_MUTEX_E;
- }
- crle->next = crl->crlList;
- crl->crlList = crle;
- wc_UnLockMutex(&crl->crlLock);
- return 0;
- }
- /* Load CRL File of type, WOLFSSL_SUCCESS on ok */
- int BufferLoadCRL(WOLFSSL_CRL* crl, const byte* buff, long sz, int type,
- int verify)
- {
- int ret = WOLFSSL_SUCCESS;
- const byte* myBuffer = buff; /* if DER ok, otherwise switch */
- DerBuffer* der = NULL;
- #ifdef WOLFSSL_SMALL_STACK
- DecodedCRL* dcrl;
- #else
- DecodedCRL dcrl[1];
- #endif
- WOLFSSL_ENTER("BufferLoadCRL");
- if (crl == NULL || buff == NULL || sz == 0)
- return BAD_FUNC_ARG;
- if (type == WOLFSSL_FILETYPE_PEM) {
- #ifdef WOLFSSL_PEM_TO_DER
- ret = PemToDer(buff, sz, CRL_TYPE, &der, NULL, NULL, NULL);
- if (ret == 0) {
- myBuffer = der->buffer;
- sz = der->length;
- }
- else {
- WOLFSSL_MSG("Pem to Der failed");
- FreeDer(&der);
- return -1;
- }
- #else
- ret = NOT_COMPILED_IN;
- #endif
- }
- #ifdef WOLFSSL_SMALL_STACK
- dcrl = (DecodedCRL*)XMALLOC(sizeof(DecodedCRL), NULL, DYNAMIC_TYPE_TMP_BUFFER);
- if (dcrl == NULL) {
- FreeDer(&der);
- return MEMORY_E;
- }
- #endif
- InitDecodedCRL(dcrl, crl->heap);
- ret = ParseCRL(dcrl, myBuffer, (word32)sz, verify, crl->cm);
- if (ret != 0 && !(ret == ASN_CRL_NO_SIGNER_E && verify == NO_VERIFY)) {
- WOLFSSL_MSG("ParseCRL error");
- }
- else {
- ret = AddCRL(crl, dcrl, myBuffer, ret != ASN_CRL_NO_SIGNER_E);
- if (ret != 0) {
- WOLFSSL_MSG("AddCRL error");
- }
- }
- FreeDecodedCRL(dcrl);
- #ifdef WOLFSSL_SMALL_STACK
- XFREE(dcrl, NULL, DYNAMIC_TYPE_TMP_BUFFER);
- #endif
- FreeDer(&der);
- return ret ? ret : WOLFSSL_SUCCESS; /* convert 0 to WOLFSSL_SUCCESS */
- }
- #if defined(OPENSSL_EXTRA) && defined(HAVE_CRL)
- /* helper function to create a new dynamic WOLFSSL_X509_CRL structure */
- static WOLFSSL_X509_CRL* wolfSSL_X509_crl_new(WOLFSSL_CERT_MANAGER* cm)
- {
- WOLFSSL_X509_CRL* ret;
- ret = (WOLFSSL_X509_CRL*)XMALLOC(sizeof(WOLFSSL_X509_CRL), cm->heap,
- DYNAMIC_TYPE_CRL);
- if (ret != NULL) {
- if (InitCRL(ret, cm) < 0) {
- WOLFSSL_MSG("Unable to initialize new CRL structure");
- XFREE(ret, cm->heap, DYNAMIC_TYPE_CRL);
- ret = NULL;
- }
- }
- return ret;
- }
- /* returns head of copied list that was alloc'd */
- static RevokedCert *DupRevokedCertList(RevokedCert* in, void* heap)
- {
- RevokedCert* head = NULL;
- RevokedCert* current = in;
- RevokedCert* prev = NULL;
- while (current) {
- RevokedCert* tmp = (RevokedCert*)XMALLOC(sizeof(RevokedCert), heap,
- DYNAMIC_TYPE_REVOKED);
- if (tmp != NULL) {
- XMEMCPY(tmp->serialNumber, current->serialNumber,
- EXTERNAL_SERIAL_SIZE);
- tmp->serialSz = current->serialSz;
- XMEMCPY(tmp->revDate, current->revDate,
- MAX_DATE_SIZE);
- tmp->revDateFormat = current->revDateFormat;
- tmp->next = NULL;
- if (prev != NULL)
- prev->next = tmp;
- if (head == NULL)
- head = tmp;
- prev = tmp;
- }
- else {
- WOLFSSL_MSG("Failed to allocate new RevokedCert structure");
- /* free up any existing list */
- while (head != NULL) {
- current = head;
- head = head->next;
- XFREE(current, heap, DYNAMIC_TYPE_REVOKED);
- }
- return NULL;
- }
- current = current->next;
- }
- (void)heap;
- return head;
- }
- /* returns a deep copy of ent on success and null on fail */
- static CRL_Entry* DupCRL_Entry(const CRL_Entry* ent, void* heap)
- {
- CRL_Entry *dupl;
- dupl = (CRL_Entry*)XMALLOC(sizeof(CRL_Entry), heap, DYNAMIC_TYPE_CRL_ENTRY);
- if (dupl == NULL) {
- WOLFSSL_MSG("alloc CRL Entry failed");
- return NULL;
- }
- XMEMSET(dupl, 0, sizeof(CRL_Entry));
- XMEMCPY(dupl->issuerHash, ent->issuerHash, CRL_DIGEST_SIZE);
- XMEMCPY(dupl->lastDate, ent->lastDate, MAX_DATE_SIZE);
- XMEMCPY(dupl->nextDate, ent->nextDate, MAX_DATE_SIZE);
- dupl->lastDateFormat = ent->lastDateFormat;
- dupl->nextDateFormat = ent->nextDateFormat;
- dupl->certs = DupRevokedCertList(ent->certs, heap);
- dupl->totalCerts = ent->totalCerts;
- dupl->verified = ent->verified;
- if (!ent->verified) {
- dupl->tbsSz = ent->tbsSz;
- dupl->signatureSz = ent->signatureSz;
- dupl->signatureOID = ent->signatureOID;
- dupl->toBeSigned = (byte*)XMALLOC(dupl->tbsSz, heap,
- DYNAMIC_TYPE_CRL_ENTRY);
- if (dupl->toBeSigned == NULL) {
- FreeCRL_Entry(dupl, heap);
- XFREE(dupl, heap, DYNAMIC_TYPE_CRL_ENTRY);
- return NULL;
- }
- dupl->signature = (byte*)XMALLOC(dupl->signatureSz, heap,
- DYNAMIC_TYPE_CRL_ENTRY);
- if (dupl->signature == NULL) {
- FreeCRL_Entry(dupl, heap);
- XFREE(dupl, heap, DYNAMIC_TYPE_CRL_ENTRY);
- return NULL;
- }
- XMEMCPY(dupl->toBeSigned, ent->toBeSigned, dupl->tbsSz);
- XMEMCPY(dupl->signature, ent->signature, dupl->signatureSz);
- #ifndef NO_SKID
- dupl->extAuthKeyIdSet = ent->extAuthKeyIdSet;
- if (dupl->extAuthKeyIdSet)
- XMEMCPY(dupl->extAuthKeyId, ent->extAuthKeyId, KEYID_SIZE);
- #endif
- }
- else {
- dupl->toBeSigned = NULL;
- dupl->tbsSz = 0;
- dupl->signature = NULL;
- dupl->signatureSz = 0;
- }
- return dupl;
- }
- /* returns the head of a deep copy of the list on success and null on fail */
- static CRL_Entry* DupCRL_list(CRL_Entry* crl, void* heap)
- {
- CRL_Entry* current;
- CRL_Entry* head = NULL;
- CRL_Entry* prev = NULL;
- current = crl;
- while (current != NULL) {
- CRL_Entry* tmp = DupCRL_Entry(current, heap);
- if (tmp != NULL) {
- tmp->next = NULL;
- if (head == NULL)
- head = tmp;
- if (prev != NULL)
- prev->next = tmp;
- prev = tmp;
- }
- else {
- WOLFSSL_MSG("Failed to allocate new CRL_Entry structure");
- /* free up any existing list */
- while (head != NULL) {
- current = head;
- head = head->next;
- FreeCRL_Entry(current, heap);
- XFREE(current, heap, DYNAMIC_TYPE_CRL_ENTRY);
- }
- return NULL;
- }
- current = current->next;
- }
- return head;
- }
- /* Duplicates everything except the parent cm pointed to.
- * Expects that Init has already been done to 'dupl'
- * return 0 on success */
- static int DupX509_CRL(WOLFSSL_X509_CRL *dupl, const WOLFSSL_X509_CRL* crl)
- {
- if (dupl == NULL || crl == NULL) {
- return BAD_FUNC_ARG;
- }
- if (crl->monitors[0].path) {
- int pathSz = (int)XSTRLEN(crl->monitors[0].path) + 1;
- dupl->monitors[0].path = (char*)XMALLOC(pathSz, dupl->heap,
- DYNAMIC_TYPE_CRL_MONITOR);
- if (dupl->monitors[0].path != NULL) {
- XSTRNCPY(dupl->monitors[0].path, crl->monitors[0].path, pathSz);
- }
- else {
- return MEMORY_E;
- }
- }
- if (crl->monitors[1].path) {
- int pathSz = (int)XSTRLEN(crl->monitors[1].path) + 1;
- dupl->monitors[1].path = (char*)XMALLOC(pathSz, dupl->heap,
- DYNAMIC_TYPE_CRL_MONITOR);
- if (dupl->monitors[1].path != NULL) {
- XSTRNCPY(dupl->monitors[1].path, crl->monitors[1].path, pathSz);
- }
- else {
- if (dupl->monitors[0].path != NULL) {
- XFREE(dupl->monitors[0].path, dupl->heap,
- DYNAMIC_TYPE_CRL_MONITOR);
- }
- return MEMORY_E;
- }
- }
- dupl->crlList = DupCRL_list(crl->crlList, dupl->heap);
- #ifdef HAVE_CRL_IO
- dupl->crlIOCb = crl->crlIOCb;
- #endif
- return 0;
- }
- /* returns WOLFSSL_SUCCESS on success. Does not take ownership of newcrl */
- int wolfSSL_X509_STORE_add_crl(WOLFSSL_X509_STORE *store, WOLFSSL_X509_CRL *newcrl)
- {
- CRL_Entry *crle;
- WOLFSSL_X509_CRL *crl;
- WOLFSSL_ENTER("wolfSSL_X509_STORE_add_crl");
- if (store == NULL || newcrl == NULL || store->cm == NULL)
- return BAD_FUNC_ARG;
- if (store->cm->crl == NULL) {
- crl = wolfSSL_X509_crl_new(store->cm);
- if (DupX509_CRL(crl, newcrl) != 0) {
- if (crl != NULL)
- FreeCRL(crl, 1);
- return WOLFSSL_FAILURE;
- }
- store->crl = store->cm->crl = crl;
- if (wolfSSL_CertManagerEnableCRL(store->cm, WOLFSSL_CRL_CHECKALL)
- != WOLFSSL_SUCCESS) {
- WOLFSSL_MSG("wolfSSL_CertManagerEnableCRL error");
- return WOLFSSL_FAILURE;
- }
- return WOLFSSL_SUCCESS;
- }
- /* find tail of current list and add new list */
- crl = store->cm->crl;
- crle = crl->crlList;
- if (newcrl->crlList != NULL) {
- CRL_Entry *tail = crle;
- CRL_Entry *toAdd;
- if (wc_LockMutex(&crl->crlLock) != 0)
- {
- WOLFSSL_MSG("wc_LockMutex failed");
- return BAD_MUTEX_E;
- }
- toAdd = DupCRL_list(newcrl->crlList, crl->heap);
- if (tail == NULL) {
- crl->crlList = toAdd;
- }
- else {
- while (tail->next != NULL) tail = tail->next;
- tail->next = toAdd;
- }
- wc_UnLockMutex(&crl->crlLock);
- }
- if (wolfSSL_CertManagerEnableCRL(store->cm, WOLFSSL_CRL_CHECKALL)
- != WOLFSSL_SUCCESS) {
- WOLFSSL_MSG("wolfSSL_CertManagerEnableCRL error");
- return WOLFSSL_FAILURE;
- }
- WOLFSSL_LEAVE("wolfSSL_X509_STORE_add_crl", WOLFSSL_SUCCESS);
- return WOLFSSL_SUCCESS;
- }
- #endif
- #ifdef HAVE_CRL_MONITOR
- /* Signal Monitor thread is setup, save status to setup flag, 0 on success */
- static int SignalSetup(WOLFSSL_CRL* crl, int status)
- {
- int ret;
- /* signal to calling thread we're setup */
- if (wc_LockMutex(&crl->crlLock) != 0) {
- WOLFSSL_MSG("wc_LockMutex crlLock failed");
- return BAD_MUTEX_E;
- }
- crl->setup = status;
- ret = pthread_cond_signal(&crl->cond);
- wc_UnLockMutex(&crl->crlLock);
- if (ret != 0)
- return BAD_COND_E;
- return 0;
- }
- /* read in new CRL entries and save new list */
- static int SwapLists(WOLFSSL_CRL* crl)
- {
- int ret;
- CRL_Entry* newList;
- #ifdef WOLFSSL_SMALL_STACK
- WOLFSSL_CRL* tmp;
- #else
- WOLFSSL_CRL tmp[1];
- #endif
- #ifdef WOLFSSL_SMALL_STACK
- tmp = (WOLFSSL_CRL*)XMALLOC(sizeof(WOLFSSL_CRL), NULL, DYNAMIC_TYPE_TMP_BUFFER);
- if (tmp == NULL)
- return MEMORY_E;
- #endif
- if (InitCRL(tmp, crl->cm) < 0) {
- WOLFSSL_MSG("Init tmp CRL failed");
- #ifdef WOLFSSL_SMALL_STACK
- XFREE(tmp, NULL, DYNAMIC_TYPE_TMP_BUFFER);
- #endif
- return -1;
- }
- if (crl->monitors[0].path) {
- ret = LoadCRL(tmp, crl->monitors[0].path, WOLFSSL_FILETYPE_PEM, 0);
- if (ret != WOLFSSL_SUCCESS) {
- WOLFSSL_MSG("PEM LoadCRL on dir change failed");
- FreeCRL(tmp, 0);
- #ifdef WOLFSSL_SMALL_STACK
- XFREE(tmp, NULL, DYNAMIC_TYPE_TMP_BUFFER);
- #endif
- return -1;
- }
- }
- if (crl->monitors[1].path) {
- ret = LoadCRL(tmp, crl->monitors[1].path, WOLFSSL_FILETYPE_ASN1, 0);
- if (ret != WOLFSSL_SUCCESS) {
- WOLFSSL_MSG("DER LoadCRL on dir change failed");
- FreeCRL(tmp, 0);
- #ifdef WOLFSSL_SMALL_STACK
- XFREE(tmp, NULL, DYNAMIC_TYPE_TMP_BUFFER);
- #endif
- return -1;
- }
- }
- if (wc_LockMutex(&crl->crlLock) != 0) {
- WOLFSSL_MSG("wc_LockMutex failed");
- FreeCRL(tmp, 0);
- #ifdef WOLFSSL_SMALL_STACK
- XFREE(tmp, NULL, DYNAMIC_TYPE_TMP_BUFFER);
- #endif
- return -1;
- }
- newList = tmp->crlList;
- /* swap lists */
- tmp->crlList = crl->crlList;
- crl->crlList = newList;
- wc_UnLockMutex(&crl->crlLock);
- FreeCRL(tmp, 0);
- #ifdef WOLFSSL_SMALL_STACK
- XFREE(tmp, NULL, DYNAMIC_TYPE_TMP_BUFFER);
- #endif
- return 0;
- }
- #if (defined(__MACH__) || defined(__FreeBSD__))
- #include <sys/types.h>
- #include <sys/event.h>
- #include <sys/time.h>
- #include <fcntl.h>
- #include <unistd.h>
- #ifdef __MACH__
- #define XEVENT_MODE O_EVTONLY
- #elif defined(__FreeBSD__)
- #define XEVENT_MODE EVFILT_VNODE
- #endif
- /* we need a unique kqueue user filter fd for crl in case user is doing custom
- * events too */
- #ifndef CRL_CUSTOM_FD
- #define CRL_CUSTOM_FD 123456
- #endif
- /* shutdown monitor thread, 0 on success */
- static int StopMonitor(int mfd)
- {
- struct kevent change;
- /* trigger custom shutdown */
- EV_SET(&change, CRL_CUSTOM_FD, EVFILT_USER, 0, NOTE_TRIGGER, 0, NULL);
- if (kevent(mfd, &change, 1, NULL, 0, NULL) < 0) {
- WOLFSSL_MSG("kevent trigger customer event failed");
- return -1;
- }
- return 0;
- }
- /* OS X monitoring */
- static void* DoMonitor(void* arg)
- {
- int fPEM, fDER;
- struct kevent change;
- WOLFSSL_CRL* crl = (WOLFSSL_CRL*)arg;
- WOLFSSL_ENTER("DoMonitor");
- crl->mfd = kqueue();
- if (crl->mfd == -1) {
- WOLFSSL_MSG("kqueue failed");
- SignalSetup(crl, MONITOR_SETUP_E);
- return NULL;
- }
- /* listen for custom shutdown event */
- EV_SET(&change, CRL_CUSTOM_FD, EVFILT_USER, EV_ADD, 0, 0, NULL);
- if (kevent(crl->mfd, &change, 1, NULL, 0, NULL) < 0) {
- WOLFSSL_MSG("kevent monitor customer event failed");
- SignalSetup(crl, MONITOR_SETUP_E);
- (void)close(crl->mfd);
- return NULL;
- }
- fPEM = -1;
- fDER = -1;
- if (crl->monitors[0].path) {
- fPEM = open(crl->monitors[0].path, XEVENT_MODE);
- if (fPEM == -1) {
- WOLFSSL_MSG("PEM event dir open failed");
- SignalSetup(crl, MONITOR_SETUP_E);
- (void)close(crl->mfd);
- return NULL;
- }
- }
- if (crl->monitors[1].path) {
- fDER = open(crl->monitors[1].path, XEVENT_MODE);
- if (fDER == -1) {
- WOLFSSL_MSG("DER event dir open failed");
- if (fPEM != -1)
- (void)close(fPEM);
- (void)close(crl->mfd);
- SignalSetup(crl, MONITOR_SETUP_E);
- 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);
- /* signal to calling thread we're setup */
- if (SignalSetup(crl, 1) != 0) {
- if (fPEM != -1)
- (void)close(fPEM);
- if (fDER != -1)
- (void)close(fDER);
- (void)close(crl->mfd);
- return NULL;
- }
- for (;;) {
- struct kevent event;
- int numEvents = kevent(crl->mfd, &change, 1, &event, 1, NULL);
- WOLFSSL_MSG("Got kevent");
- if (numEvents == -1) {
- WOLFSSL_MSG("kevent problem, continue");
- continue;
- }
- if (event.filter == EVFILT_USER) {
- WOLFSSL_MSG("Got user shutdown event, breaking out");
- break;
- }
- if (SwapLists(crl) < 0) {
- WOLFSSL_MSG("SwapLists problem, continue");
- }
- }
- if (fPEM != -1)
- (void)close(fPEM);
- if (fDER != -1)
- (void)close(fDER);
- (void)close(crl->mfd);
- return NULL;
- }
- #elif defined(__linux__)
- #include <sys/types.h>
- #include <sys/inotify.h>
- #include <sys/eventfd.h>
- #include <unistd.h>
- #ifndef max
- static WC_INLINE int max(int a, int b)
- {
- return a > b ? a : b;
- }
- #endif /* max */
- /* shutdown monitor thread, 0 on success */
- static int StopMonitor(int mfd)
- {
- word64 w64 = 1;
- /* write to our custom event */
- if (write(mfd, &w64, sizeof(w64)) < 0) {
- WOLFSSL_MSG("StopMonitor write failed");
- return -1;
- }
- return 0;
- }
- /* linux monitoring */
- static void* DoMonitor(void* arg)
- {
- int notifyFd;
- int wd = -1;
- WOLFSSL_CRL* crl = (WOLFSSL_CRL*)arg;
- #ifdef WOLFSSL_SMALL_STACK
- char* buff;
- #else
- char buff[8192];
- #endif
- WOLFSSL_ENTER("DoMonitor");
- crl->mfd = eventfd(0, 0); /* our custom shutdown event */
- if (crl->mfd < 0) {
- WOLFSSL_MSG("eventfd failed");
- SignalSetup(crl, MONITOR_SETUP_E);
- return NULL;
- }
- notifyFd = inotify_init();
- if (notifyFd < 0) {
- WOLFSSL_MSG("inotify failed");
- (void)close(crl->mfd);
- SignalSetup(crl, MONITOR_SETUP_E);
- return NULL;
- }
- if (crl->monitors[0].path) {
- wd = inotify_add_watch(notifyFd, crl->monitors[0].path, IN_CLOSE_WRITE |
- IN_DELETE);
- if (wd < 0) {
- WOLFSSL_MSG("PEM notify add watch failed");
- (void)close(crl->mfd);
- (void)close(notifyFd);
- SignalSetup(crl, MONITOR_SETUP_E);
- return NULL;
- }
- }
- if (crl->monitors[1].path) {
- wd = inotify_add_watch(notifyFd, crl->monitors[1].path, IN_CLOSE_WRITE |
- IN_DELETE);
- if (wd < 0) {
- WOLFSSL_MSG("DER notify add watch failed");
- (void)close(crl->mfd);
- (void)close(notifyFd);
- SignalSetup(crl, MONITOR_SETUP_E);
- return NULL;
- }
- }
- #ifdef WOLFSSL_SMALL_STACK
- buff = (char*)XMALLOC(8192, NULL, DYNAMIC_TYPE_TMP_BUFFER);
- if (buff == NULL)
- return NULL;
- #endif
- /* signal to calling thread we're setup */
- if (SignalSetup(crl, 1) != 0) {
- #ifdef WOLFSSL_SMALL_STACK
- XFREE(buff, NULL, DYNAMIC_TYPE_TMP_BUFFER);
- #endif
- if (wd > 0) {
- if (inotify_rm_watch(notifyFd, wd) < 0)
- WOLFSSL_MSG("inotify_rm_watch #1 failed in DoMonitor");
- }
- (void)close(crl->mfd);
- (void)close(notifyFd);
- return NULL;
- }
- for (;;) {
- fd_set readfds;
- int result;
- int length;
- FD_ZERO(&readfds);
- FD_SET(notifyFd, &readfds);
- FD_SET(crl->mfd, &readfds);
- result = select(max(notifyFd, crl->mfd) + 1, &readfds, NULL, NULL,NULL);
- WOLFSSL_MSG("Got notify event");
- if (result < 0) {
- WOLFSSL_MSG("select problem, continue");
- continue;
- }
- if (FD_ISSET(crl->mfd, &readfds)) {
- word64 r64;
- int rlen;
- WOLFSSL_MSG("got custom shutdown event, breaking out");
- /* read out the bytes written to the event to clean up */
- rlen = (int) read(crl->mfd, &r64, sizeof(r64));
- if (rlen < 0) {
- WOLFSSL_MSG("read custom event failure");
- }
- break;
- }
- length = (int) read(notifyFd, buff, 8192);
- if (length < 0) {
- WOLFSSL_MSG("notify read problem, continue");
- continue;
- }
- if (SwapLists(crl) < 0) {
- WOLFSSL_MSG("SwapLists problem, continue");
- }
- }
- #ifdef WOLFSSL_SMALL_STACK
- XFREE(buff, NULL, DYNAMIC_TYPE_TMP_BUFFER);
- #endif
- if (wd > 0) {
- if (inotify_rm_watch(notifyFd, wd) < 0)
- WOLFSSL_MSG("inotify_rm_watch #2 failed in DoMonitor");
- }
- (void)close(crl->mfd);
- (void)close(notifyFd);
- return NULL;
- }
- #endif /* MACH or linux */
- /* Start Monitoring the CRL path(s) in a thread */
- static int StartMonitorCRL(WOLFSSL_CRL* crl)
- {
- int ret = WOLFSSL_SUCCESS;
- WOLFSSL_ENTER("StartMonitorCRL");
- if (crl == NULL)
- return BAD_FUNC_ARG;
- if (crl->tid != 0) {
- WOLFSSL_MSG("Monitor thread already running");
- return ret; /* that's ok, someone already started */
- }
- if (pthread_create(&crl->tid, NULL, DoMonitor, crl) != 0) {
- WOLFSSL_MSG("Thread creation error");
- return THREAD_CREATE_E;
- }
- /* wait for setup to complete */
- if (wc_LockMutex(&crl->crlLock) != 0) {
- WOLFSSL_MSG("wc_LockMutex crlLock error");
- return BAD_MUTEX_E;
- }
- while (crl->setup == 0) {
- if (pthread_cond_wait(&crl->cond, &crl->crlLock) != 0) {
- ret = BAD_COND_E;
- break;
- }
- }
- if (crl->setup < 0)
- ret = crl->setup; /* store setup error */
- wc_UnLockMutex(&crl->crlLock);
- if (ret < 0) {
- WOLFSSL_MSG("DoMonitor setup failure");
- crl->tid = 0; /* thread already done */
- }
- return ret;
- }
- #else /* HAVE_CRL_MONITOR */
- #if !defined(NO_FILESYSTEM) && !defined(NO_WOLFSSL_DIR)
- static int StartMonitorCRL(WOLFSSL_CRL* crl)
- {
- (void)crl;
- WOLFSSL_ENTER("StartMonitorCRL");
- WOLFSSL_MSG("Not compiled in");
- return NOT_COMPILED_IN;
- }
- #endif /* !NO_FILESYSTEM && !NO_WOLFSSL_DIR */
- #endif /* HAVE_CRL_MONITOR */
- #if !defined(NO_FILESYSTEM) && !defined(NO_WOLFSSL_DIR)
- /* Load CRL path files of type, WOLFSSL_SUCCESS on ok */
- int LoadCRL(WOLFSSL_CRL* crl, const char* path, int type, int monitor)
- {
- int ret = WOLFSSL_SUCCESS;
- char* name = NULL;
- #ifdef WOLFSSL_SMALL_STACK
- ReadDirCtx* readCtx = NULL;
- #else
- ReadDirCtx readCtx[1];
- #endif
- WOLFSSL_ENTER("LoadCRL");
- if (crl == NULL)
- return BAD_FUNC_ARG;
- #ifdef WOLFSSL_SMALL_STACK
- readCtx = (ReadDirCtx*)XMALLOC(sizeof(ReadDirCtx), crl->heap,
- DYNAMIC_TYPE_TMP_BUFFER);
- if (readCtx == NULL)
- return MEMORY_E;
- #endif
- /* try to load each regular file in path */
- ret = wc_ReadDirFirst(readCtx, path, &name);
- while (ret == 0 && name) {
- int skip = 0;
- if (type == WOLFSSL_FILETYPE_PEM) {
- if (XSTRSTR(name, ".pem") == NULL) {
- WOLFSSL_MSG("not .pem file, skipping");
- skip = 1;
- }
- }
- else {
- if (XSTRSTR(name, ".der") == NULL &&
- XSTRSTR(name, ".crl") == NULL)
- {
- WOLFSSL_MSG("not .der or .crl file, skipping");
- skip = 1;
- }
- }
- if (!skip && ProcessFile(NULL, name, type, CRL_TYPE, NULL, 0, crl,
- VERIFY) != WOLFSSL_SUCCESS) {
- WOLFSSL_MSG("CRL file load failed, continuing");
- }
- ret = wc_ReadDirNext(readCtx, path, &name);
- }
- wc_ReadDirClose(readCtx);
- ret = WOLFSSL_SUCCESS; /* load failures not reported, for backwards compat */
- #ifdef WOLFSSL_SMALL_STACK
- XFREE(readCtx, crl->heap, DYNAMIC_TYPE_TMP_BUFFER);
- #endif
- if (monitor & WOLFSSL_CRL_MONITOR) {
- word32 pathLen;
- char* pathBuf;
- WOLFSSL_MSG("monitor path requested");
- pathLen = (word32)XSTRLEN(path);
- pathBuf = (char*)XMALLOC(pathLen+1, crl->heap,DYNAMIC_TYPE_CRL_MONITOR);
- if (pathBuf) {
- XSTRNCPY(pathBuf, path, pathLen+1);
- if (type == WOLFSSL_FILETYPE_PEM) {
- /* free old path before setting a new one */
- if (crl->monitors[0].path) {
- XFREE(crl->monitors[0].path, crl->heap,
- DYNAMIC_TYPE_CRL_MONITOR);
- }
- crl->monitors[0].path = pathBuf;
- crl->monitors[0].type = WOLFSSL_FILETYPE_PEM;
- } else {
- /* free old path before setting a new one */
- if (crl->monitors[1].path) {
- XFREE(crl->monitors[1].path, crl->heap,
- DYNAMIC_TYPE_CRL_MONITOR);
- }
- crl->monitors[1].path = pathBuf;
- crl->monitors[1].type = WOLFSSL_FILETYPE_ASN1;
- }
- if (monitor & WOLFSSL_CRL_START_MON) {
- WOLFSSL_MSG("start monitoring requested");
- ret = StartMonitorCRL(crl);
- }
- }
- else {
- ret = MEMORY_E;
- }
- }
- return ret;
- }
- #else
- int LoadCRL(WOLFSSL_CRL* crl, const char* path, int type, int monitor)
- {
- (void)crl;
- (void)path;
- (void)type;
- (void)monitor;
- /* stub for scenario where file system is not supported */
- return NOT_COMPILED_IN;
- }
- #endif /* !NO_FILESYSTEM && !NO_WOLFSSL_DIR */
- #endif /* HAVE_CRL */
- #endif /* !WOLFCRYPT_ONLY */
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