diff options
Diffstat (limited to 'plugins/omdtls')
| -rw-r--r-- | plugins/omdtls/Makefile.am | 6 | ||||
| -rw-r--r-- | plugins/omdtls/Makefile.in | 797 | ||||
| -rw-r--r-- | plugins/omdtls/omdtls.c | 853 |
3 files changed, 1656 insertions, 0 deletions
diff --git a/plugins/omdtls/Makefile.am b/plugins/omdtls/Makefile.am new file mode 100644 index 0000000..8451028 --- /dev/null +++ b/plugins/omdtls/Makefile.am @@ -0,0 +1,6 @@ +pkglib_LTLIBRARIES = omdtls.la +omdtls_la_DEPENDENCIES = ../../runtime/lmnsd_ossl.la +omdtls_la_SOURCES = omdtls.c +omdtls_la_CPPFLAGS = -I$(top_srcdir) $(PTHREADS_CFLAGS) $(RSRT_CFLAGS) $(OPENSSL_CFLAGS) +omdtls_la_LDFLAGS = -module -avoid-version +omdtls_la_LIBADD = $(OPENSSL_LIBS) ../../runtime/lmnsd_ossl.la diff --git a/plugins/omdtls/Makefile.in b/plugins/omdtls/Makefile.in new file mode 100644 index 0000000..6978ece --- /dev/null +++ b/plugins/omdtls/Makefile.in @@ -0,0 +1,797 @@ +# Makefile.in generated by automake 1.16.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2018 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; 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compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * -or- + * see COPYING.ASL20 in the source distribution + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "config.h" +#include <stdio.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> +#include <strings.h> +#include <assert.h> +#include <errno.h> +#include <fcntl.h> +#include <pthread.h> +#include <sys/uio.h> +#include <sys/queue.h> +#include <netdb.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <math.h> +#ifdef HAVE_SYS_STAT_H +# include <sys/stat.h> +#endif +#include <sys/time.h> +#include <time.h> + +// --- Include openssl headers as well +#include <openssl/ssl.h> +#include <openssl/x509v3.h> +#include <openssl/err.h> +#if OPENSSL_VERSION_NUMBER >= 0x30000000L && !defined(LIBRESSL_VERSION_NUMBER) +# include <openssl/bioerr.h> +#endif +#include <openssl/engine.h> +// --- + +// Include rsyslog headers +#include "rsyslog.h" +#include "syslogd-types.h" +#include "srUtils.h" +#include "template.h" +#include "module-template.h" +#include "glbl.h" +#include "errmsg.h" +#include "atomic.h" +#include "statsobj.h" +#include "unicode-helper.h" +#include "datetime.h" +#include "net_ossl.h" + +MODULE_TYPE_OUTPUT +MODULE_TYPE_NOKEEP +MODULE_CNFNAME("omdtls") + +/* internal structures + */ +DEF_OMOD_STATIC_DATA +DEFobjCurrIf(glbl) +DEFobjCurrIf(datetime) +DEFobjCurrIf(statsobj) +DEFobjCurrIf(net_ossl) + +statsobj_t *dtlsStats; +STATSCOUNTER_DEF(ctrDtlsSubmit, mutCtrDtlsSubmit); +STATSCOUNTER_DEF(ctrDtlsFail, mutCtrDtlsFail); + +#define DTLS_MAX_RCVBUF 8192 /* Maximum DTLS packet is 8192 bytes which fits into Jumbo Frames. If not enabled + * message fragmentation (Ethernet MTU of ~ 1500 bytes) can occur.*/ +#define SETUP_DTLS_NONE 0 +#define SETUP_DTLS_AUTOCLOSE 1 + +enum DTLSState { + DTLS_CONNECTED, + DTLS_CONNECTING, + DTLS_DISCONNECTED +}; + +/* Struct for module InstanceData */ +typedef struct _instanceData { + uchar *tplName; /* name of assigned template */ + + uchar *target; + uchar *port; + + uchar *tlscfgcmd; /* OpenSSL Config Command used to override any OpenSSL Settings */ + int bHaveSess; /* True if DTLS session is established */ + int CertVerifyDepth; /* Verify Depth for certificate chains */ + + /* OpenSSL and Config Cert vars inside net_ossl_t now */ + net_ossl_t *pNetOssl; /* OSSL shared Config and object vars are here */ + + uchar *statsName; + statsobj_t *stats; /* listener stats */ + STATSCOUNTER_DEF(ctrDtlsSubmit, mutCtrDtlsSubmit) + STATSCOUNTER_DEF(ctrDtlsFail, mutCtrDtlsFail); + + struct _instanceData *next; + struct _instanceData *prev; +} instanceData; + +/* Struct for module workerInstanceData */ +typedef struct wrkrInstanceData { + instanceData *pData; + + enum DTLSState ConnectState; /* DTLS Connection State Status */ + pthread_rwlock_t pnLock; + + // DTLS Helpers + struct sockaddr_in dtls_client_addr; /* local bind socket*/ + struct addrinfo* dtls_rcvr_addrinfo; /* remote receiver address */ + + int sockin; /* UDP Socket used to receive DTLS */ + int sockout; /* UDP Socket used to send DTLS */ + SSL *sslClient; /* DTSL (SSL) Client */ +} wrkrInstanceData_t; + +#define INST_STATSCOUNTER_INC(inst, ctr, mut) \ + do { \ + if (inst->stats) { STATSCOUNTER_INC(ctr, mut); } \ + } while(0); + +// QPID Proton Handler functions +static rsRetVal dtls_create_socket(wrkrInstanceData_t *const __restrict__ pWrkrData, int autoclose); +static rsRetVal dtls_init(wrkrInstanceData_t *pWrkrData); +static rsRetVal dtls_connect(wrkrInstanceData_t *pWrkrData); +static rsRetVal dtls_close(wrkrInstanceData_t *pWrkrData); +static rsRetVal dtls_send(wrkrInstanceData_t *pWrkrData, const actWrkrIParams_t *__restrict__ const pParam, + const int iMsg); + + +/* tables for interfacing with the v6 config system */ +/* action (instance) parameters */ +static struct cnfparamdescr actpdescr[] = { + { "target", eCmdHdlrGetWord, 0 }, + { "port", eCmdHdlrGetWord, 0 }, + { "tls.authmode", eCmdHdlrString, 0 }, + { "tls.cacert", eCmdHdlrString, 0 }, + { "tls.mycert", eCmdHdlrString, 0 }, + { "tls.myprivkey", eCmdHdlrString, 0 }, + { "tls.tlscfgcmd", eCmdHdlrString, 0 }, + { "template", eCmdHdlrGetWord, 0 }, + { "statsname", eCmdHdlrGetWord, 0 } +}; +static struct cnfparamblk actpblk = + { CNFPARAMBLK_VERSION, + sizeof(actpdescr)/sizeof(struct cnfparamdescr), + actpdescr + }; + +/* module-global parameters */ +static struct cnfparamdescr modpdescr[] = { + { "template", eCmdHdlrGetWord, 0 }, +}; +static struct cnfparamblk modpblk = + { CNFPARAMBLK_VERSION, + sizeof(modpdescr)/sizeof(struct cnfparamdescr), + modpdescr + }; + +struct modConfData_s { + rsconf_t *pConf; /* our overall config object */ + instanceData *root, *tail; + uchar *tplName; /* default template */ +}; + +static modConfData_t *loadModConf = NULL; /* modConf ptr to use for the current load process */ +static modConfData_t *runModConf = NULL; /* modConf ptr to use for the current exec process */ + +BEGINinitConfVars /* (re)set config variables to default values */ +CODESTARTinitConfVars +ENDinitConfVars + +static rsRetVal +dtls_create_socket(wrkrInstanceData_t *const __restrict__ pWrkrData, int autoclose) +{ + DEFiRet; + DBGPRINTF("omdtls[%p]: dtls_create_socket ENTER\n", pWrkrData); + pthread_rwlock_wrlock(&pWrkrData->pnLock); + + if (autoclose == SETUP_DTLS_AUTOCLOSE) { + // Close Existing Connection + dtls_close(pWrkrData); + } + + // Init & Open Connection + CHKiRet(dtls_init(pWrkrData)); +finalize_it: + if (iRet != RS_RET_OK) { + /* Parameter Error's cannot be resumed, so we need to disable the action */ + if (iRet == RS_RET_PARAM_ERROR) { + iRet = RS_RET_DISABLE_ACTION; + LogError(0, iRet, "omdtls[%p]: action will be disabled due invalid " + "configuration parameters\n", pWrkrData); + } + } + pthread_rwlock_unlock(&pWrkrData->pnLock); + RETiRet; +} + +BEGINbeginCnfLoad +CODESTARTbeginCnfLoad + loadModConf = pModConf; + pModConf->pConf = pConf; + pModConf->tplName = NULL; +ENDbeginCnfLoad + +BEGINsetModCnf + int i; +CODESTARTsetModCnf + const struct cnfparamvals *const __restrict__ pvals = nvlstGetParams(lst, &modpblk, NULL); + if(pvals == NULL) { + ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS); + } + + if(Debug) { + dbgprintf("module (global) param blk for omdtls:\n"); + cnfparamsPrint(&modpblk, pvals); + } + + for(i = 0 ; i < modpblk.nParams ; ++i) { + if(!pvals[i].bUsed) + continue; + if(!strcmp(modpblk.descr[i].name, "template")) { + loadModConf->tplName = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else { + dbgprintf("omdtls: program error, non-handled " + "param '%s' in beginCnfLoad\n", modpblk.descr[i].name); + } + } +finalize_it: + if(pvals != NULL) + cnfparamvalsDestruct(pvals, &modpblk); +ENDsetModCnf + +BEGINendCnfLoad +CODESTARTendCnfLoad + loadModConf = NULL; /* done loading */ +ENDendCnfLoad + +BEGINcheckCnf +CODESTARTcheckCnf +ENDcheckCnf + +BEGINactivateCnfPrePrivDrop + instanceData *inst; +CODESTARTactivateCnfPrePrivDrop + runModConf = pModConf; + DBGPRINTF("omdtls: activateCnfPrePrivDrop\n"); + + for(inst = runModConf->root ; inst != NULL ; inst = inst->next) { + CHKiRet(net_ossl.osslCtxInit(inst->pNetOssl, DTLS_method())); + // Run openssl config commands in Context + CHKiRet(net_ossl_apply_tlscgfcmd(inst->pNetOssl, inst->tlscfgcmd)); + } +finalize_it: +ENDactivateCnfPrePrivDrop + +BEGINactivateCnf +CODESTARTactivateCnf +ENDactivateCnf + +BEGINfreeCnf +CODESTARTfreeCnf + free(pModConf->tplName); +ENDfreeCnf + +BEGINcreateInstance +CODESTARTcreateInstance + DBGPRINTF("createInstance[%p]: ENTER\n", pData); + pData->tplName = NULL; + pData->target = NULL; + pData->port = NULL; + pData->tlscfgcmd = NULL; + pData->statsName = NULL; + + /* node created, let's add to config */ + if(loadModConf->tail == NULL) { + loadModConf->tail = loadModConf->root = pData; + } else { + loadModConf->tail->next = pData; + loadModConf->tail = pData; + } + + // Construct pNetOssl helper + CHKiRet(net_ossl.Construct(&pData->pNetOssl)); + pData->pNetOssl->authMode = OSSL_AUTH_CERTANON; +finalize_it: +ENDcreateInstance + + +BEGINcreateWrkrInstance +CODESTARTcreateWrkrInstance + DBGPRINTF("createWrkrInstance[%p]: ENTER\n", pWrkrData); + pWrkrData->ConnectState = DTLS_DISCONNECTED; + + CHKiRet(pthread_rwlock_init(&pWrkrData->pnLock, NULL)); +finalize_it: + DBGPRINTF("createWrkrInstance[%p] returned %d\n", pWrkrData, iRet); +ENDcreateWrkrInstance + + +BEGINisCompatibleWithFeature +CODESTARTisCompatibleWithFeature +ENDisCompatibleWithFeature + + +BEGINfreeInstance +CODESTARTfreeInstance + DBGPRINTF("freeInstance[%p]: ENTER\n", pData); + + if (pData->stats) { + statsobj.Destruct(&pData->stats); + } + + // DeConstruct pNetOssl helper + net_ossl.Destruct(&pData->pNetOssl); + + /* Free other mem */ + free(pData->target); + free(pData->port); + free(pData->tlscfgcmd); + + free(pData->tplName); + free(pData->statsName); +ENDfreeInstance + +BEGINfreeWrkrInstance +CODESTARTfreeWrkrInstance + DBGPRINTF("freeWrkrInstance[%p]: ENTER\n", pWrkrData); + pthread_rwlock_wrlock(&pWrkrData->pnLock); + + // Close DTLS Connection + dtls_close(pWrkrData); + + pthread_rwlock_unlock(&pWrkrData->pnLock); + pthread_rwlock_destroy(&pWrkrData->pnLock); +ENDfreeWrkrInstance + + +BEGINdbgPrintInstInfo +CODESTARTdbgPrintInstInfo +ENDdbgPrintInstInfo + +BEGINtryResume +CODESTARTtryResume + DBGPRINTF("omdtls[%p]: tryResume ENTER\n", pWrkrData); + if (pWrkrData->ConnectState == DTLS_DISCONNECTED) { + CHKiRet(dtls_create_socket(pWrkrData, SETUP_DTLS_AUTOCLOSE)); + } +finalize_it: + DBGPRINTF("omdtls[%p]: tryResume returned %d\n", pWrkrData, iRet); +ENDtryResume + +BEGINbeginTransaction +CODESTARTbeginTransaction + /* we have nothing to do to begin a transaction */ + DBGPRINTF("omdtls[%p]: beginTransaction ENTER\n", pWrkrData); + if (pWrkrData->ConnectState == DTLS_DISCONNECTED) { + CHKiRet(dtls_create_socket(pWrkrData, SETUP_DTLS_NONE)); + } +finalize_it: + RETiRet; +ENDbeginTransaction + +/* + * New Transaction action interface +*/ +BEGINcommitTransaction + unsigned i; + sbool bDone = 0; +CODESTARTcommitTransaction +#ifndef NDEBUG + DBGPRINTF("omdtls[%p]: commitTransaction [%d msgs] ENTER\n", pWrkrData, nParams); +#endif + do { + for(i = 0 ; i < nParams ; ++i) { + CHKiRet(dtls_send(pWrkrData, pParams, i)); + } + bDone = 1; + } while (bDone == 0); +finalize_it: + if(iRet != RS_RET_OK) { + DBGPRINTF("omdtls[%p]: commitTransaction failed with status %d\n", pWrkrData, iRet); + pWrkrData->ConnectState = DTLS_DISCONNECTED; + iRet = RS_RET_SUSPENDED; + } + DBGPRINTF("omdtls[%p]: commitTransaction [%d msgs] EXIT\n", pWrkrData, nParams); +ENDcommitTransaction + +BEGINnewActInst + struct cnfparamvals *pvals; + int i; + int iNumTpls; + FILE *fp; + DBGPRINTF("newActInst: ENTER\n"); +CODESTARTnewActInst + if((pvals = nvlstGetParams(lst, &actpblk, NULL)) == NULL) { + ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS); + } + + // Create new instance and set default params + CHKiRet(createInstance(&pData)); + + for(i = 0 ; i < actpblk.nParams ; ++i) { + if(!pvals[i].bUsed) + continue; + if(!strcmp(actpblk.descr[i].name, "target")) { + pData->target = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(actpblk.descr[i].name, "port")) { + pData->port = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(actpblk.descr[i].name, "template")) { + pData->tplName = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(actpblk.descr[i].name, "statsname")) { + pData->statsName = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(actpblk.descr[i].name, "tls.authmode")) { + char* pszAuthMode = es_str2cstr(pvals[i].val.d.estr, NULL); + if(!strcasecmp(pszAuthMode, "fingerprint")) + pData->pNetOssl->authMode = OSSL_AUTH_CERTFINGERPRINT; + else if(!strcasecmp(pszAuthMode, "name")) + pData->pNetOssl->authMode = OSSL_AUTH_CERTNAME; + else if(!strcasecmp(pszAuthMode, "certvalid")) + pData->pNetOssl->authMode = OSSL_AUTH_CERTVALID; + else + pData->pNetOssl->authMode = OSSL_AUTH_CERTANON; + free(pszAuthMode); + } else if(!strcmp(actpblk.descr[i].name, "tls.cacert")) { + pData->pNetOssl->pszCAFile = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + fp = fopen((const char*)pData->pNetOssl->pszCAFile, "r"); + if(fp == NULL) { + char errStr[1024]; + rs_strerror_r(errno, errStr, sizeof(errStr)); + LogError(0, RS_RET_NO_FILE_ACCESS, + "error: certificate file %s couldn't be accessed: %s\n", + pData->pNetOssl->pszCAFile, errStr); + } else { + fclose(fp); + } + } else if(!strcmp(actpblk.descr[i].name, "tls.mycert")) { + pData->pNetOssl->pszCertFile = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + fp = fopen((const char*)pData->pNetOssl->pszCertFile, "r"); + if(fp == NULL) { + char errStr[1024]; + rs_strerror_r(errno, errStr, sizeof(errStr)); + LogError(0, RS_RET_NO_FILE_ACCESS, + "error: certificate file %s couldn't be accessed: %s\n", + pData->pNetOssl->pszCertFile, errStr); + } else { + fclose(fp); + } + } else if(!strcmp(actpblk.descr[i].name, "tls.myprivkey")) { + pData->pNetOssl->pszKeyFile = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + fp = fopen((const char*)pData->pNetOssl->pszKeyFile, "r"); + if(fp == NULL) { + char errStr[1024]; + rs_strerror_r(errno, errStr, sizeof(errStr)); + LogError(0, RS_RET_NO_FILE_ACCESS, + "error: certificate file %s couldn't be accessed: %s\n", + pData->pNetOssl->pszKeyFile, errStr); + } else { + fclose(fp); + } + } else if(!strcmp(actpblk.descr[i].name, "tls.tlscfgcmd")) { + pData->tlscfgcmd = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else { + LogError(0, RS_RET_INTERNAL_ERROR, + "omdtls: program error, non-handled param '%s'\n", actpblk.descr[i].name); + } + } + + /* check if no port is set. If so, we use DEFAULT of 433 */ + if(pData->port == NULL) { + CHKmalloc(pData->port = (uchar *)strdup("443")); + } + + iNumTpls = 1; + CODE_STD_STRING_REQUESTnewActInst(iNumTpls); + + CHKiRet(OMSRsetEntry(*ppOMSR, 0, (uchar*)strdup((pData->tplName == NULL) ? + "RSYSLOG_FileFormat" : (char*)pData->tplName), + OMSR_NO_RQD_TPL_OPTS)); + + if (pData->statsName) { + CHKiRet(statsobj.Construct(&pData->stats)); + CHKiRet(statsobj.SetName(pData->stats, (uchar *)pData->statsName)); + CHKiRet(statsobj.SetOrigin(pData->stats, (uchar *)"omdtls")); + + /* Track following stats */ + STATSCOUNTER_INIT(pData->ctrDtlsSubmit, pData->mutCtrDtlsSubmit); + CHKiRet(statsobj.AddCounter(pData->stats, (uchar *)"submitted", + ctrType_IntCtr, CTR_FLAG_RESETTABLE, &pData->ctrDtlsSubmit)); + STATSCOUNTER_INIT(pData->ctrDtlsFail, pData->mutCtrDtlsFail); + CHKiRet(statsobj.AddCounter(pData->stats, (uchar *)"failures", + ctrType_IntCtr, CTR_FLAG_RESETTABLE, &pData->ctrDtlsFail)); + CHKiRet(statsobj.ConstructFinalize(pData->stats)); + } +CODE_STD_FINALIZERnewActInst + cnfparamvalsDestruct(pvals, &actpblk); +ENDnewActInst + + +BEGINmodExit +CODESTARTmodExit + DBGPRINTF("modExit: ENTER\n"); + statsobj.Destruct(&dtlsStats); + objRelease(net_ossl, LM_NET_OSSL_FILENAME); + objRelease(statsobj, CORE_COMPONENT); + objRelease(datetime, CORE_COMPONENT); + objRelease(glbl, CORE_COMPONENT); +ENDmodExit + +NO_LEGACY_CONF_parseSelectorAct +BEGINqueryEtryPt +CODESTARTqueryEtryPt +CODEqueryEtryPt_STD_OMODTX_QUERIES +CODEqueryEtryPt_STD_OMOD8_QUERIES +CODEqueryEtryPt_STD_CONF2_QUERIES +CODEqueryEtryPt_STD_CONF2_setModCnf_QUERIES +CODEqueryEtryPt_STD_CONF2_PREPRIVDROP_QUERIES +CODEqueryEtryPt_STD_CONF2_OMOD_QUERIES +ENDqueryEtryPt + + +BEGINmodInit() +CODESTARTmodInit + DBGPRINTF("modInit: ENTER\n"); +INITLegCnfVars + *ipIFVersProvided = CURR_MOD_IF_VERSION; +CODEmodInit_QueryRegCFSLineHdlr + /* request objects we use */ + CHKiRet(objUse(glbl, CORE_COMPONENT)); + CHKiRet(objUse(net_ossl, LM_NET_OSSL_FILENAME)); + CHKiRet(objUse(datetime, CORE_COMPONENT)); + CHKiRet(objUse(statsobj, CORE_COMPONENT)); + + CHKiRet(statsobj.Construct(&dtlsStats)); + CHKiRet(statsobj.SetName(dtlsStats, (uchar *)"omdtls")); + CHKiRet(statsobj.SetOrigin(dtlsStats, (uchar*)"omdtls")); + STATSCOUNTER_INIT(ctrDtlsSubmit, mutCtrDtlsSubmit); + CHKiRet(statsobj.AddCounter(dtlsStats, (uchar *)"submitted", + ctrType_IntCtr, CTR_FLAG_RESETTABLE, &ctrDtlsSubmit)); + STATSCOUNTER_INIT(ctrDtlsFail, mutCtrDtlsFail); + CHKiRet(statsobj.AddCounter(dtlsStats, (uchar *)"failures", + ctrType_IntCtr, CTR_FLAG_RESETTABLE, &ctrDtlsFail)); + + CHKiRet(statsobj.ConstructFinalize(dtlsStats)); +ENDmodInit + +/* +* Setup socket and establish virtual Connect on a SOCKET Level for DTLS +*/ +static rsRetVal +dtls_send(wrkrInstanceData_t *pWrkrData, const actWrkrIParams_t *__restrict__ const pParam, const int iMsg) +{ + DEFiRet; + int iErr, sslerr; + instanceData *const pData = (instanceData *const) pWrkrData->pData; + + // Get Msg String + const char* pszParamStr = (const char*)actParam(pParam, 1 /*pData->iNumTpls*/, iMsg, 0).param; + size_t tzParamStrLen = actParam(pParam, 1 /*pData->iNumTpls*/, iMsg, 0).lenStr; + DBGPRINTF("dtls_send[%p]: msg %d msg:'%.*s%s'\n", + pWrkrData, + iMsg, + (int)(tzParamStrLen > 0 ? (tzParamStrLen > 64 ? 64 : tzParamStrLen-1) : 0), + pszParamStr, + (tzParamStrLen > 64 ? "..." : "")); + + iErr = SSL_write(pWrkrData->sslClient, pszParamStr, tzParamStrLen); + if(iErr > 0) { + DBGPRINTF("dtls_send[%p]: Successfully send message '%s' with %ld bytes to %s:%s\n", + pWrkrData, pszParamStr, tzParamStrLen, pData->target, pData->port); + + // Increment Stats Counter + STATSCOUNTER_INC(ctrDtlsSubmit, mutCtrDtlsSubmit); + INST_STATSCOUNTER_INC(pData, pData->ctrDtlsSubmit, pData->mutCtrDtlsSubmit); + } else { + sslerr = SSL_get_error(pWrkrData->sslClient, iErr); + if (sslerr == SSL_ERROR_SYSCALL) { + dbgprintf("dtls_send[%p]: SSL_write failed with SSL_ERROR_SYSCALL(%s)" + " - Aborting Connection.\n", pWrkrData, strerror(errno)); + net_ossl_lastOpenSSLErrorMsg(pData->target, iErr, pWrkrData->sslClient, LOG_WARNING, + "omdtls", "SSL_write"); + ABORT_FINALIZE(RS_RET_ERR); + } else { + dbgprintf("dtls_send[%p]: SSL_write failed with ERROR [%d]: %s" + " - Aborting Connection.\n", pWrkrData, sslerr, ERR_error_string(sslerr, NULL)); + net_ossl_lastOpenSSLErrorMsg(pData->target, iErr, pWrkrData->sslClient, LOG_WARNING, + "omdtls", "SSL_write"); + ABORT_FINALIZE(RS_RET_ERR); + } + + // Increment Stats Counter + STATSCOUNTER_INC(ctrDtlsFail, mutCtrDtlsFail); + INST_STATSCOUNTER_INC(pData, pData->ctrDtlsFail, pData->mutCtrDtlsFail); + } +finalize_it: + DBGPRINTF("dtls_send[%p]: Exit with %d for %s:%s\n", pWrkrData, iRet, pData->target, pData->port); + if(iRet != RS_RET_OK) { + dtls_close(pWrkrData); + } + RETiRet; +} + +/* +* Setup socket and establish virtual Connect on a SOCKET Level for DTLS +*/ +static rsRetVal +dtls_connect(wrkrInstanceData_t *pWrkrData) { + DEFiRet; + int iErr; + instanceData *const pData = (instanceData *const) pWrkrData->pData; + BIO *bio_client; + const SSL_CIPHER *sslCipher; + + DBGPRINTF("dtls_connect[%p]: setup DTLS for %s:%s\n", pWrkrData, pData->target, pData->port); + pWrkrData->ConnectState = DTLS_CONNECTING; + + // Create SSL object + pWrkrData->sslClient = SSL_new(pData->pNetOssl->ctx); + if(!pWrkrData->sslClient) { + dbgprintf("dtls_connect[%p]: SSL_new failed failed\n", pWrkrData); + net_ossl_lastOpenSSLErrorMsg(pData->target, 0, pWrkrData->sslClient, LOG_WARNING, "omdtls", "SSL_new"); + ABORT_FINALIZE(RS_RET_ERR); + } + + // Set certifcate check callback + if (pData->pNetOssl->authMode != OSSL_AUTH_CERTANON) { + dbgprintf("dtls_connect[%p]: enable certificate checking (Mode=%d, VerifyDepth=%d)\n", + pWrkrData, pData->pNetOssl->authMode, pData->CertVerifyDepth); + /* Enable certificate valid checking */ + net_ossl_set_ssl_verify_callback(pWrkrData->sslClient, SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT); + if (pData->CertVerifyDepth != 0) { + SSL_set_verify_depth(pWrkrData->sslClient, pData->CertVerifyDepth); + } + } else { + dbgprintf("dtls_connect[%p]: disable certificate checking\n", pWrkrData); + net_ossl_set_ssl_verify_callback(pWrkrData->sslClient, SSL_VERIFY_NONE); + } + + /* Create BIO from socket array! */ + bio_client = BIO_new_dgram(pWrkrData->sockout, BIO_NOCLOSE); + if (!bio_client) { + net_ossl_lastOpenSSLErrorMsg(pData->target, 0, pWrkrData->sslClient, LOG_INFO, + "dtls_connect", "BIO_new_dgram"); + ABORT_FINALIZE(RS_RET_ERR); + } + BIO_ctrl(bio_client, BIO_CTRL_DGRAM_SET_CONNECTED, 0, &pWrkrData->dtls_client_addr); + SSL_set_bio(pWrkrData->sslClient, bio_client, bio_client); + + /* Set debug Callback for conn BIO as well! */ + net_ossl_set_bio_callback(bio_client); + + dbgprintf("dtls_connect[%p]: Starting DTLS session ...\n", pWrkrData); + /* Perform handshake */ + iErr = SSL_connect(pWrkrData->sslClient); + if (iErr <= 0) { + net_ossl_lastOpenSSLErrorMsg(pData->target, iErr, pWrkrData->sslClient, LOG_INFO, + "dtls_connect", "SSL_connect"); + ABORT_FINALIZE(RS_RET_ERR); + } + + // Print Cipher info + sslCipher = SSL_get_current_cipher(pWrkrData->sslClient); + dbgprintf("dtls_connect[%p]: Cipher Version: %s Name: %s\n", pWrkrData, + SSL_CIPHER_get_version(sslCipher), SSL_CIPHER_get_name(sslCipher)); + + if(Debug) { + // Print Peer Certificate info + X509 *cert = SSL_get_peer_certificate(pWrkrData->sslClient); + if (cert != NULL) { + char *line; + line = X509_NAME_oneline(X509_get_subject_name(cert), 0, 0); + dbgprintf("dtls_connect[%p]: Subject: %s\n", pWrkrData, line); + OPENSSL_free(line); + + line = X509_NAME_oneline(X509_get_issuer_name(cert), 0, 0); + dbgprintf("dtls_connect[%p]: Issuer: %s\n", pWrkrData, line); + OPENSSL_free(line); + X509_free(cert); + } else { + dbgprintf("dtls_connect[%p]: No certificates.\n", pWrkrData); + } + } + + /* Set reference in SSL obj */ + SSL_set_ex_data(pWrkrData->sslClient, 0, NULL); + SSL_set_ex_data(pWrkrData->sslClient, 1, NULL); + + /* Set and activate timeouts */ + struct timeval timeout; + timeout.tv_sec = 3; + timeout.tv_usec = 0; + BIO_ctrl(bio_client, BIO_CTRL_DGRAM_SET_RECV_TIMEOUT, 0, &timeout); + + pWrkrData->ConnectState = DTLS_CONNECTED; +finalize_it: + DBGPRINTF("dtls_connect[%p]: Exit with %d for %s:%s\n", pWrkrData, iRet, pData->target, pData->port); + if(iRet != RS_RET_OK) { + pWrkrData->ConnectState = DTLS_DISCONNECTED; + } + RETiRet; +} + +/* +* Setup socket and establish virtual Connect on a SOCKET Level for DTLS +*/ +static rsRetVal +dtls_init(wrkrInstanceData_t *pWrkrData) +{ + DEFiRet; + int iErr; + instanceData *const pData = (instanceData *const) pWrkrData->pData; + struct addrinfo *addrResolved = NULL; + struct addrinfo hints; + DBGPRINTF("dtls_init[%p]: setup for %s:%s\n", pWrkrData, pData->target, pData->port); + + // Close previous ressources if any left open + dtls_close(pWrkrData); + + // Setup receiving Socket for DTLS + if((pWrkrData->sockin = socket(AF_INET, SOCK_DGRAM, 0)) == -1) + return 1; + memset(&pWrkrData->dtls_client_addr, 0, sizeof(pWrkrData->dtls_client_addr)); + pWrkrData->dtls_client_addr.sin_family = AF_INET; + pWrkrData->dtls_client_addr.sin_port = htons(0); + pWrkrData->dtls_client_addr.sin_addr.s_addr = INADDR_ANY; + if (bind(pWrkrData->sockin, + (struct sockaddr*)&pWrkrData->dtls_client_addr, + sizeof(pWrkrData->dtls_client_addr)) < 0) { + LogError(0, RS_RET_SUSPENDED, "omdtls[%p]: dtls_init Unable to bind DTLS CLient socket with errno %d", + pWrkrData, errno); + ABORT_FINALIZE(RS_RET_COULD_NOT_BIND); + } + + // Resolve target address + memset(&hints, 0, sizeof(hints)); + /* port must be numeric, because config file syntax requires this */ + hints.ai_family = glbl.GetDefPFFamily(runModConf->pConf); + hints.ai_socktype = SOCK_DGRAM; + if((iErr = (getaddrinfo((char*)pData->target, (char*)pData->port, &hints, &addrResolved))) != 0) { + LogError(0, RS_RET_SUSPENDED, + "omdtls[%p]: could not get addrinfo for hostname '%s':'%s': %s", + pWrkrData, pData->target, pData->port, gai_strerror(iErr)); + ABORT_FINALIZE(RS_RET_ADDRESS_UNKNOWN); + } + pWrkrData->dtls_rcvr_addrinfo = addrResolved; + addrResolved = NULL; + + // Init Socket Connection (Which technically does not connect but prepares socket for DTLS) + DBGPRINTF("dtls_init[%p]: Init Session to %s:%s\n", pWrkrData, pData->target, pData->port); + + // Connect the UDP socket to the receiver's address + pWrkrData->sockout = socket(AF_INET, SOCK_DGRAM, 0); + if (connect(pWrkrData->sockout, + pWrkrData->dtls_rcvr_addrinfo->ai_addr, + pWrkrData->dtls_rcvr_addrinfo->ai_addrlen) < 0) { + LogError(0, RS_RET_SUSPENDED, + "dtls_init[%p]: Failed to connect to hostname '%s':'%s': %s", + pWrkrData, pData->target, pData->port, gai_strerror(iErr)); + ABORT_FINALIZE(RS_RET_ERR); + } + + // Socket Connect successfull, no continue with TLS + CHKiRet(dtls_connect(pWrkrData)); + + // We reached this position means we are ready to send! + pWrkrData->ConnectState = DTLS_CONNECTED; +finalize_it: + DBGPRINTF("dtls_init[%p]: doTryResume %s iRet %d\n", pWrkrData, pData->target, iRet); + if(addrResolved != NULL) { + freeaddrinfo(addrResolved); + } + if(iRet != RS_RET_OK) { + if(pWrkrData->dtls_rcvr_addrinfo != NULL) { + freeaddrinfo(pWrkrData->dtls_rcvr_addrinfo); + pWrkrData->dtls_rcvr_addrinfo = NULL; + } + iRet = RS_RET_SUSPENDED; + + // Force DTLS Disconnect State + dtls_close(pWrkrData); + // pWrkrData->ConnectState = DTLS_DISCONNECTED; + } + RETiRet; +} + +static rsRetVal +dtls_close(wrkrInstanceData_t *pWrkrData) +{ + DEFiRet; + int iErr; + instanceData *const pData = (instanceData *const) pWrkrData->pData; + if (pWrkrData->ConnectState == DTLS_CONNECTED) { + DBGPRINTF("dtls_close[%p]: close session for %s:%s\n", pWrkrData, pData->target, pData->port); + if ( pWrkrData->sslClient != NULL && + pWrkrData->ConnectState == DTLS_CONNECTED) { + iErr = SSL_shutdown(pWrkrData->sslClient); + if (iErr <= 0){ + /* Shutdown not finished, call SSL_read to do a bidirectional shutdown, see doc: + * https://www.openssl.org/docs/man1.1.1/man3/SSL_shutdown.html + * We do a single SSL_read which should be fine for protocol handling. + * No data is to be expected from the receiver side. + */ + char rcvBuf[DTLS_MAX_RCVBUF]; + SSL_read(pWrkrData->sslClient, rcvBuf, DTLS_MAX_RCVBUF); + } + SSL_free(pWrkrData->sslClient); + pWrkrData->sslClient = NULL; + } + } + + // Close Sockets + if ( pWrkrData->sockout != 0) { + close(pWrkrData->sockout); + pWrkrData->sockout = 0; + } + if ( pWrkrData->sockin != 0) { + close(pWrkrData->sockin); + pWrkrData->sockin = 0; + } + + // Free Memory + if(pWrkrData->dtls_rcvr_addrinfo != NULL) { + freeaddrinfo(pWrkrData->dtls_rcvr_addrinfo); + pWrkrData->dtls_rcvr_addrinfo = NULL; + } + + // Reset Helpers + pWrkrData->ConnectState = DTLS_DISCONNECTED; +FINALIZE; +finalize_it: + RETiRet; +} |