1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/* An implementation of the nsd interface for GnuTLS.
*
* Copyright 2008-2021 Adiscon GmbH.
*
* 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_GTLS_H
#define INCLUDED_NSD_GTLS_H
#include "nsd.h"
#define NSD_GTLS_MAX_RCVBUF 16 * 1024 + 1/* TLS RFC 8449: max size of buffer for message reception */
#define NSD_GTLS_MAX_CERT 10 /* max number of certs in our chain */
typedef enum {
gtlsRtry_None = 0, /**< no call needs to be retried */
gtlsRtry_handshake = 1,
gtlsRtry_recv = 2
} gtlsRtryCall_t; /**< IDs of calls that needs to be retried */
typedef enum {
gtlsDir_READ = 0, /**< GNUTLS wants READ */
gtlsDir_WRITE = 1 /**< GNUTLS wants WRITE */
} gtlsDirection_t;
typedef nsd_if_t nsd_gtls_if_t; /* we just *implement* this interface */
/* the nsd_gtls object */
struct nsd_gtls_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 */
const uchar *pszCAFile;
const uchar *pszCRLFile;
const uchar *pszKeyFile;
const uchar *pszCertFile;
gnutls_certificate_credentials_t xcred;
int xcred_is_copy;
int iMode; /* 0 - plain tcp, 1 - TLS */
int bAbortConn; /* if set, abort conncection (fatal error had happened) */
enum {
GTLS_AUTH_CERTNAME = 0,
GTLS_AUTH_CERTFINGERPRINT = 1,
GTLS_AUTH_CERTVALID = 2,
GTLS_AUTH_CERTANON = 3
} authMode;
enum {
GTLS_EXPIRED_PERMIT = 0,
GTLS_EXPIRED_DENY = 1,
GTLS_EXPIRED_WARN = 2
} permitExpiredCerts;
enum {
GTLS_NONE = 0,
GTLS_PURPOSE = 1
} dataTypeCheck;
int bSANpriority; /* if true, we do stricter checking (if any SAN present we do not cehck CN) */
gtlsRtryCall_t rtryCall;/**< what must we retry? */
int bIsInitiator; /**< 0 if socket is the server end (listener), 1 if it is the initiator */
gnutls_session_t sess;
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) */
int bReportAuthErr; /* only the first auth error is to be reported, this var triggers it. Initially, it is
* set to 1 and changed to 0 after the first report. It is changed back to 1 after
* one successful authentication. */
permittedPeers_t *pPermPeers; /* permitted peers */
uchar *gnutlsPriorityString; /* gnutls priority string */
int DrvrVerifyDepth; /* Verify Depth for certificate chains */
gnutls_x509_crt_t pOurCerts[NSD_GTLS_MAX_CERT]; /**< our certificate, if in client mode
(unused in server mode) */
unsigned int nOurCerts; /* number of certificates in our chain */
gnutls_x509_privkey_t ourKey; /**< our private key, if in client mode (unused in server mode) */
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_GTLS_MAX_RCVBUF-1: data of that size present */
int ptrRcvBuf; /**< offset for next recv operation if 0 < lenRcvBuf < NSD_GTLS_MAX_RCVBUF */
};
/* interface is defined in nsd.h, we just implement it! */
#define nsd_gtlsCURR_IF_VERSION nsdCURR_IF_VERSION
/* prototypes */
PROTOTYPEObj(nsd_gtls);
/* some prototypes for things used by our nsdsel_gtls helper class */
uchar *gtlsStrerror(int error);
rsRetVal gtlsChkPeerAuth(nsd_gtls_t *pThis);
rsRetVal gtlsRecordRecv(nsd_gtls_t *pThis);
/* the name of our library binary */
#define LM_NSD_GTLS_FILENAME "lmnsd_gtls"
#if GNUTLS_VERSION_NUMBER <= 0x00030000
#define GTLS_ANON_PRIO_NOTLSV13 "NORMAL:-VERS-TLS1.3:+ANON-DH:+COMP-ALL"
#define GTLS_ANON_PRIO "NORMAL:+ANON-DH:+COMP-ALL"
#else
#define GTLS_ANON_PRIO_NOTLSV13 "NORMAL:-VERS-TLS1.3:+ANON-DH:+ANON-ECDH:+COMP-ALL"
#define GTLS_ANON_PRIO "NORMAL:+ANON-DH:+ANON-ECDH:+COMP-ALL"
#endif
#if GNUTLS_VERSION_MAJOR > 3 || (GNUTLS_VERSION_MAJOR == 3 && GNUTLS_VERSION_MINOR >=4)
#define EXTENDED_CERT_CHECK_AVAILABLE
#endif
#endif /* #ifndef INCLUDED_NSD_GTLS_H */
|
