1 /* $OpenBSD: bss_log.c,v 1.24 2023/07/05 21:23:37 beck Exp $ */
2 /* ====================================================================
3 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 *
17 * 3. All advertising materials mentioning features or use of this
18 * software must display the following acknowledgment:
19 * "This product includes software developed by the OpenSSL Project
20 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
21 *
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 * endorse or promote products derived from this software without
24 * prior written permission. For written permission, please contact
25 * licensing@OpenSSL.org.
26 *
27 * 5. Products derived from this software may not be called "OpenSSL"
28 * nor may "OpenSSL" appear in their names without prior written
29 * permission of the OpenSSL Project.
30 *
31 * 6. Redistributions of any form whatsoever must retain the following
32 * acknowledgment:
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 *
50 * This product includes cryptographic software written by Eric Young
51 * (eay@cryptsoft.com). This product includes software written by Tim
52 * Hudson (tjh@cryptsoft.com).
53 *
54 */
55
56 /*
57 Why BIO_s_log?
58
59 BIO_s_log is useful for system daemons (or services under NT).
60 It is one-way BIO, it sends all stuff to syslogd (on system that
61 commonly use that), or event log (on NT), or OPCOM (on OpenVMS).
62
63 */
64
65 #include <errno.h>
66 #include <stdio.h>
67 #include <string.h>
68 #include <syslog.h>
69
70 #include <openssl/buffer.h>
71 #include <openssl/err.h>
72
73 #include "bio_local.h"
74
75 #ifndef NO_SYSLOG
76
77 static int slg_write(BIO *h, const char *buf, int num);
78 static int slg_puts(BIO *h, const char *str);
79 static long slg_ctrl(BIO *h, int cmd, long arg1, void *arg2);
80 static int slg_new(BIO *h);
81 static int slg_free(BIO *data);
82 static void xopenlog(BIO* bp, char* name, int level);
83 static void xsyslog(BIO* bp, int priority, const char* string);
84 static void xcloselog(BIO* bp);
85
86 static const BIO_METHOD methods_slg = {
87 .type = BIO_TYPE_MEM,
88 .name = "syslog",
89 .bwrite = slg_write,
90 .bputs = slg_puts,
91 .ctrl = slg_ctrl,
92 .create = slg_new,
93 .destroy = slg_free
94 };
95
96 const BIO_METHOD *
BIO_s_log(void)97 BIO_s_log(void)
98 {
99 return (&methods_slg);
100 }
101 LCRYPTO_ALIAS(BIO_s_log);
102
103 static int
slg_new(BIO * bi)104 slg_new(BIO *bi)
105 {
106 bi->init = 1;
107 bi->num = 0;
108 bi->ptr = NULL;
109 xopenlog(bi, "application", LOG_DAEMON);
110 return (1);
111 }
112
113 static int
slg_free(BIO * a)114 slg_free(BIO *a)
115 {
116 if (a == NULL)
117 return (0);
118 xcloselog(a);
119 return (1);
120 }
121
122 static int
slg_write(BIO * b,const char * in,int inl)123 slg_write(BIO *b, const char *in, int inl)
124 {
125 int ret = inl;
126 char* buf;
127 char* pp;
128 int priority, i;
129 static const struct {
130 int strl;
131 char str[10];
132 int log_level;
133 }
134 mapping[] = {
135 { 6, "PANIC ", LOG_EMERG },
136 { 6, "EMERG ", LOG_EMERG },
137 { 4, "EMR ", LOG_EMERG },
138 { 6, "ALERT ", LOG_ALERT },
139 { 4, "ALR ", LOG_ALERT },
140 { 5, "CRIT ", LOG_CRIT },
141 { 4, "CRI ", LOG_CRIT },
142 { 6, "ERROR ", LOG_ERR },
143 { 4, "ERR ", LOG_ERR },
144 { 8, "WARNING ", LOG_WARNING },
145 { 5, "WARN ", LOG_WARNING },
146 { 4, "WAR ", LOG_WARNING },
147 { 7, "NOTICE ", LOG_NOTICE },
148 { 5, "NOTE ", LOG_NOTICE },
149 { 4, "NOT ", LOG_NOTICE },
150 { 5, "INFO ", LOG_INFO },
151 { 4, "INF ", LOG_INFO },
152 { 6, "DEBUG ", LOG_DEBUG },
153 { 4, "DBG ", LOG_DEBUG },
154 { 0, "", LOG_ERR } /* The default */
155 };
156
157 if ((buf = malloc(inl + 1)) == NULL) {
158 return (0);
159 }
160 strlcpy(buf, in, inl + 1);
161 i = 0;
162 while (strncmp(buf, mapping[i].str, mapping[i].strl) != 0)
163 i++;
164 priority = mapping[i].log_level;
165 pp = buf + mapping[i].strl;
166
167 xsyslog(b, priority, pp);
168
169 free(buf);
170 return (ret);
171 }
172
173 static long
slg_ctrl(BIO * b,int cmd,long num,void * ptr)174 slg_ctrl(BIO *b, int cmd, long num, void *ptr)
175 {
176 switch (cmd) {
177 case BIO_CTRL_SET:
178 xcloselog(b);
179 xopenlog(b, ptr, num);
180 break;
181 default:
182 break;
183 }
184 return (0);
185 }
186
187 static int
slg_puts(BIO * bp,const char * str)188 slg_puts(BIO *bp, const char *str)
189 {
190 int n, ret;
191
192 n = strlen(str);
193 ret = slg_write(bp, str, n);
194 return (ret);
195 }
196
197
198 static void
xopenlog(BIO * bp,char * name,int level)199 xopenlog(BIO* bp, char* name, int level)
200 {
201 openlog(name, LOG_PID|LOG_CONS, level);
202 }
203
204 static void
xsyslog(BIO * bp,int priority,const char * string)205 xsyslog(BIO *bp, int priority, const char *string)
206 {
207 syslog(priority, "%s", string);
208 }
209
210 static void
xcloselog(BIO * bp)211 xcloselog(BIO* bp)
212 {
213 closelog();
214 }
215
216 #endif /* NO_SYSLOG */
217