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/* An implementation of the nsd interface for OpenSSL.
*
* Copyright 2018-2023 Adiscon GmbH.
* Author: Andre Lorbach
*
* This file is part of the rsyslog runtime library.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in 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.
*/
#ifndef INCLUDED_NSD_OSSL_H
#define INCLUDED_NSD_OSSL_H
#include "nsd.h"
#define NSD_OSSL_MAX_RCVBUF 16 * 1024 + 1/* TLS RFC 8449: max size of buffer for message reception */
typedef enum {
osslRtry_None = 0, /**< no call needs to be retried */
osslRtry_handshake = 1,
osslRtry_recv = 2
} osslRtryCall_t; /**< IDs of calls that needs to be retried */
typedef nsd_if_t nsd_ossl_if_t; /* we just *implement* this interface */
/* the nsd_ossl object */
struct nsd_ossl_s {
BEGINobjInstance; /* Data to implement generic object - MUST be the first data element! */
nsd_t *pTcp; /**< our aggregated nsd_ptcp data */
uchar *pszConnectHost; /**< hostname used for connect - may be used to
authenticate peer if no other name given */
int iMode; /* 0 - plain tcp, 1 - TLS */
int bAbortConn; /* if set, abort conncection (fatal error had happened) */
PermitExpiredCerts permitExpiredCerts;
osslRtryCall_t rtryCall;/**< what must we retry? */
int rtryOsslErr; /**< store ssl error code into like SSL_ERROR_WANT_READ or SSL_ERROR_WANT_WRITE */
int bIsInitiator; /**< 0 if socket is the server end (listener), 1 if it is the initiator */
int bHaveSess; /* as we don't know exactly which gnutls_session values
are invalid, we use this one to flag whether or
not we are in a session (same as -1 for a socket
meaning no sess) */
uchar *gnutlsPriorityString; /* gnutls priority string */
int DrvrVerifyDepth; /* Verify Depth for certificate chains */
short bOurCertIsInit; /**< 1 if our certificate is initialized and must be deinit on destruction */
short bOurKeyIsInit; /**< 1 if our private key is initialized and must be deinit on destruction */
char *pszRcvBuf;
int lenRcvBuf;
/**< -1: empty, 0: connection closed, 1..NSD_OSSL_MAX_RCVBUF-1: data of that size present */
int ptrRcvBuf; /**< offset for next recv operation if 0 < lenRcvBuf < NSD_OSSL_MAX_RCVBUF */
/* OpenSSL and Config Cert vars inside net_ossl_t now */
net_ossl_t *pNetOssl; /* OSSL shared Config and object vars are here */
};
/* interface is defined in nsd.h, we just implement it! */
#define nsd_osslCURR_IF_VERSION nsdCURR_IF_VERSION
/* prototypes */
PROTOTYPEObj(nsd_ossl);
/* some prototypes for things used by our nsdsel_ossl helper class */
uchar *osslStrerror(int error);
rsRetVal osslChkPeerAuth(nsd_ossl_t *pThis);
rsRetVal osslRecordRecv(nsd_ossl_t *pThis);
rsRetVal osslHandshakeCheck(nsd_ossl_t *pNsd);
void nsd_ossl_lastOpenSSLErrorMsg(nsd_ossl_t const *pThis, const int ret, SSL *ssl, int severity,
const char* pszCallSource, const char* pszOsslApi);
rsRetVal osslPostHandshakeCheck(nsd_ossl_t *pNsd);
/* the name of our library binary */
#define LM_NSD_OSSL_FILENAME "lmnsd_ossl"
#endif /* #ifndef INCLUDED_NSD_OSSL_H */
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