1 3efd8e31 2022-10-23 thomas /*
  2 3efd8e31 2022-10-23 thomas  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
  3 3efd8e31 2022-10-23 thomas  * Copyright (c) 2016-2019, 2020-2021 Tracey Emery <tracey@traceyemery.net>
  4 3efd8e31 2022-10-23 thomas  * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
  5 3efd8e31 2022-10-23 thomas  * Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
  6 3efd8e31 2022-10-23 thomas  * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
  7 3efd8e31 2022-10-23 thomas  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
  8 3efd8e31 2022-10-23 thomas  * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
  9 3efd8e31 2022-10-23 thomas  * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
 10 3efd8e31 2022-10-23 thomas  *
 11 3efd8e31 2022-10-23 thomas  * Permission to use, copy, modify, and distribute this software for any
 12 3efd8e31 2022-10-23 thomas  * purpose with or without fee is hereby granted, provided that the above
 13 3efd8e31 2022-10-23 thomas  * copyright notice and this permission notice appear in all copies.
 14 3efd8e31 2022-10-23 thomas  *
 15 3efd8e31 2022-10-23 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 16 3efd8e31 2022-10-23 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 17 3efd8e31 2022-10-23 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 18 3efd8e31 2022-10-23 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 19 3efd8e31 2022-10-23 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 20 3efd8e31 2022-10-23 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 21 3efd8e31 2022-10-23 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 22 3efd8e31 2022-10-23 thomas  */
 23 3efd8e31 2022-10-23 thomas 
 24 3efd8e31 2022-10-23 thomas %{
 25 3efd8e31 2022-10-23 thomas #include <sys/time.h>
 26 3efd8e31 2022-10-23 thomas #include <sys/types.h>
 27 3efd8e31 2022-10-23 thomas #include <sys/queue.h>
 28 3efd8e31 2022-10-23 thomas #include <sys/stat.h>
 29 3efd8e31 2022-10-23 thomas 
 30 3efd8e31 2022-10-23 thomas #include <ctype.h>
 31 3efd8e31 2022-10-23 thomas #include <err.h>
 32 3efd8e31 2022-10-23 thomas #include <errno.h>
 33 3efd8e31 2022-10-23 thomas #include <event.h>
 34 3efd8e31 2022-10-23 thomas #include <imsg.h>
 35 3efd8e31 2022-10-23 thomas #include <limits.h>
 36 3efd8e31 2022-10-23 thomas #include <sha1.h>
 37 3efd8e31 2022-10-23 thomas #include <stdarg.h>
 38 3efd8e31 2022-10-23 thomas #include <stdlib.h>
 39 3efd8e31 2022-10-23 thomas #include <stdio.h>
 40 3efd8e31 2022-10-23 thomas #include <string.h>
 41 3efd8e31 2022-10-23 thomas #include <syslog.h>
 42 3efd8e31 2022-10-23 thomas #include <unistd.h>
 43 3efd8e31 2022-10-23 thomas 
 44 3efd8e31 2022-10-23 thomas #include "got_error.h"
 45 3efd8e31 2022-10-23 thomas #include "got_path.h"
 46 3efd8e31 2022-10-23 thomas 
 47 3efd8e31 2022-10-23 thomas #include "log.h"
 48 3efd8e31 2022-10-23 thomas #include "gotd.h"
 49 0781db0e 2023-01-06 thomas #include "auth.h"
 50 0781db0e 2023-01-06 thomas #include "listen.h"
 51 3efd8e31 2022-10-23 thomas 
 52 3efd8e31 2022-10-23 thomas TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
 53 3efd8e31 2022-10-23 thomas static struct file {
 54 3efd8e31 2022-10-23 thomas 	TAILQ_ENTRY(file)	 entry;
 55 3efd8e31 2022-10-23 thomas 	FILE			*stream;
 56 3efd8e31 2022-10-23 thomas 	char			*name;
 57 3efd8e31 2022-10-23 thomas 	int			 lineno;
 58 3efd8e31 2022-10-23 thomas 	int			 errors;
 59 3efd8e31 2022-10-23 thomas } *file;
 60 3efd8e31 2022-10-23 thomas struct file	*newfile(const char *, int);
 61 3efd8e31 2022-10-23 thomas static void	 closefile(struct file *);
 62 3efd8e31 2022-10-23 thomas int		 check_file_secrecy(int, const char *);
 63 3efd8e31 2022-10-23 thomas int		 yyparse(void);
 64 3efd8e31 2022-10-23 thomas int		 yylex(void);
 65 3efd8e31 2022-10-23 thomas int		 yyerror(const char *, ...)
 66 3efd8e31 2022-10-23 thomas     __attribute__((__format__ (printf, 1, 2)))
 67 3efd8e31 2022-10-23 thomas     __attribute__((__nonnull__ (1)));
 68 3efd8e31 2022-10-23 thomas int		 kw_cmp(const void *, const void *);
 69 3efd8e31 2022-10-23 thomas int		 lookup(char *);
 70 3efd8e31 2022-10-23 thomas int		 lgetc(int);
 71 3efd8e31 2022-10-23 thomas int		 lungetc(int);
 72 3efd8e31 2022-10-23 thomas int		 findeol(void);
 73 3efd8e31 2022-10-23 thomas 
 74 3efd8e31 2022-10-23 thomas TAILQ_HEAD(symhead, sym)	 symhead = TAILQ_HEAD_INITIALIZER(symhead);
 75 3efd8e31 2022-10-23 thomas struct sym {
 76 3efd8e31 2022-10-23 thomas 	TAILQ_ENTRY(sym)	 entry;
 77 3efd8e31 2022-10-23 thomas 	int			 used;
 78 3efd8e31 2022-10-23 thomas 	int			 persist;
 79 3efd8e31 2022-10-23 thomas 	char			*nam;
 80 3efd8e31 2022-10-23 thomas 	char			*val;
 81 3efd8e31 2022-10-23 thomas };
 82 3efd8e31 2022-10-23 thomas 
 83 3efd8e31 2022-10-23 thomas int	 symset(const char *, const char *, int);
 84 3efd8e31 2022-10-23 thomas char	*symget(const char *);
 85 3efd8e31 2022-10-23 thomas 
 86 3efd8e31 2022-10-23 thomas static int		 errors;
 87 3efd8e31 2022-10-23 thomas 
 88 3efd8e31 2022-10-23 thomas static struct gotd		*gotd;
 89 3efd8e31 2022-10-23 thomas static struct gotd_repo		*new_repo;
 90 67f822ee 2023-01-06 thomas static int			 conf_limit_user_connections(const char *, int);
 91 3efd8e31 2022-10-23 thomas static struct gotd_repo		*conf_new_repo(const char *);
 92 c3841c67 2022-11-18 thomas static void			 conf_new_access_rule(struct gotd_repo *,
 93 c3841c67 2022-11-18 thomas 				    enum gotd_access, int, char *);
 94 3efd8e31 2022-10-23 thomas static enum gotd_procid		 gotd_proc_id;
 95 3efd8e31 2022-10-23 thomas 
 96 3efd8e31 2022-10-23 thomas typedef struct {
 97 3efd8e31 2022-10-23 thomas 	union {
 98 3efd8e31 2022-10-23 thomas 		long long	 number;
 99 3efd8e31 2022-10-23 thomas 		char		*string;
100 0781db0e 2023-01-06 thomas 		struct timeval	 tv;
101 3efd8e31 2022-10-23 thomas 	} v;
102 3efd8e31 2022-10-23 thomas 	int lineno;
103 3efd8e31 2022-10-23 thomas } YYSTYPE;
104 3efd8e31 2022-10-23 thomas 
105 3efd8e31 2022-10-23 thomas %}
106 3efd8e31 2022-10-23 thomas 
107 729a7e24 2022-11-17 thomas %token	PATH ERROR ON UNIX_SOCKET UNIX_GROUP USER REPOSITORY PERMIT DENY
108 0781db0e 2023-01-06 thomas %token	RO RW CONNECTION LIMIT REQUEST TIMEOUT
109 3efd8e31 2022-10-23 thomas 
110 3efd8e31 2022-10-23 thomas %token	<v.string>	STRING
111 3efd8e31 2022-10-23 thomas %token	<v.number>	NUMBER
112 3efd8e31 2022-10-23 thomas %type	<v.number>	boolean
113 0781db0e 2023-01-06 thomas %type	<v.tv>		timeout
114 3efd8e31 2022-10-23 thomas 
115 3efd8e31 2022-10-23 thomas %%
116 3efd8e31 2022-10-23 thomas 
117 3efd8e31 2022-10-23 thomas grammar		:
118 3efd8e31 2022-10-23 thomas 		| grammar '\n'
119 3efd8e31 2022-10-23 thomas 		| grammar main '\n'
120 3efd8e31 2022-10-23 thomas 		| grammar repository '\n'
121 3efd8e31 2022-10-23 thomas 		;
122 3efd8e31 2022-10-23 thomas 
123 3efd8e31 2022-10-23 thomas boolean		: STRING {
124 3efd8e31 2022-10-23 thomas 			if (strcasecmp($1, "1") == 0 ||
125 3efd8e31 2022-10-23 thomas 			    strcasecmp($1, "yes") == 0 ||
126 3efd8e31 2022-10-23 thomas 			    strcasecmp($1, "on") == 0)
127 3efd8e31 2022-10-23 thomas 				$$ = 1;
128 3efd8e31 2022-10-23 thomas 			else if (strcasecmp($1, "0") == 0 ||
129 3efd8e31 2022-10-23 thomas 			    strcasecmp($1, "off") == 0 ||
130 3efd8e31 2022-10-23 thomas 			    strcasecmp($1, "no") == 0)
131 3efd8e31 2022-10-23 thomas 				$$ = 0;
132 3efd8e31 2022-10-23 thomas 			else {
133 3efd8e31 2022-10-23 thomas 				yyerror("invalid boolean value '%s'", $1);
134 3efd8e31 2022-10-23 thomas 				free($1);
135 3efd8e31 2022-10-23 thomas 				YYERROR;
136 3efd8e31 2022-10-23 thomas 			}
137 3efd8e31 2022-10-23 thomas 			free($1);
138 3efd8e31 2022-10-23 thomas 		}
139 3efd8e31 2022-10-23 thomas 		| ON { $$ = 1; }
140 3efd8e31 2022-10-23 thomas 		| NUMBER { $$ = $1; }
141 3efd8e31 2022-10-23 thomas 		;
142 3efd8e31 2022-10-23 thomas 
143 0781db0e 2023-01-06 thomas timeout		: NUMBER {
144 0781db0e 2023-01-06 thomas 			if ($1 < 0) {
145 0781db0e 2023-01-06 thomas 				yyerror("invalid timeout: %lld", $1);
146 0781db0e 2023-01-06 thomas 				YYERROR;
147 0781db0e 2023-01-06 thomas 			}
148 0781db0e 2023-01-06 thomas 			$$.tv_sec = $1;
149 0781db0e 2023-01-06 thomas 			$$.tv_usec = 0;
150 0781db0e 2023-01-06 thomas 		}
151 77d755e8 2023-01-06 thomas 		| STRING {
152 77d755e8 2023-01-06 thomas 			const char	*errstr;
153 77d755e8 2023-01-06 thomas 			const char	*type = "seconds";
154 77d755e8 2023-01-06 thomas 			size_t		 len;
155 77d755e8 2023-01-06 thomas 			int		 mul = 1;
156 77d755e8 2023-01-06 thomas 
157 77d755e8 2023-01-06 thomas 			if (*$1 == '\0') {
158 77d755e8 2023-01-06 thomas 				yyerror("invalid number of seconds: %s", $1);
159 77d755e8 2023-01-06 thomas 				free($1);
160 77d755e8 2023-01-06 thomas 				YYERROR;
161 77d755e8 2023-01-06 thomas 			}
162 77d755e8 2023-01-06 thomas 
163 77d755e8 2023-01-06 thomas 			len = strlen($1);
164 77d755e8 2023-01-06 thomas 			switch ($1[len - 1]) {
165 77d755e8 2023-01-06 thomas 			case 'S':
166 77d755e8 2023-01-06 thomas 			case 's':
167 77d755e8 2023-01-06 thomas 				$1[len - 1] = '\0';
168 77d755e8 2023-01-06 thomas 				break;
169 77d755e8 2023-01-06 thomas 			case 'M':
170 77d755e8 2023-01-06 thomas 			case 'm':
171 77d755e8 2023-01-06 thomas 				type = "minutes";
172 77d755e8 2023-01-06 thomas 				mul = 60;
173 77d755e8 2023-01-06 thomas 				$1[len - 1] = '\0';
174 77d755e8 2023-01-06 thomas 				break;
175 77d755e8 2023-01-06 thomas 			case 'H':
176 77d755e8 2023-01-06 thomas 			case 'h':
177 77d755e8 2023-01-06 thomas 				type = "hours";
178 77d755e8 2023-01-06 thomas 				mul = 60 * 60;
179 77d755e8 2023-01-06 thomas 				$1[len - 1] = '\0';
180 77d755e8 2023-01-06 thomas 				break;
181 77d755e8 2023-01-06 thomas 			}
182 77d755e8 2023-01-06 thomas 
183 77d755e8 2023-01-06 thomas 			$$.tv_usec = 0;
184 85bccbf7 2023-01-06 thomas 			$$.tv_sec = strtonum($1, 0, INT_MAX / mul, &errstr);
185 77d755e8 2023-01-06 thomas 			if (errstr) {
186 77d755e8 2023-01-06 thomas 				yyerror("number of %s is %s: %s", type,
187 77d755e8 2023-01-06 thomas 				    errstr, $1);
188 77d755e8 2023-01-06 thomas 				free($1);
189 77d755e8 2023-01-06 thomas 				YYERROR;
190 77d755e8 2023-01-06 thomas 			}
191 77d755e8 2023-01-06 thomas 
192 77d755e8 2023-01-06 thomas 			$$.tv_sec *= mul;
193 77d755e8 2023-01-06 thomas 			free($1);
194 77d755e8 2023-01-06 thomas 		}
195 0781db0e 2023-01-06 thomas 		;
196 0781db0e 2023-01-06 thomas 
197 3efd8e31 2022-10-23 thomas main		: UNIX_SOCKET STRING {
198 2b3d32a1 2022-12-30 thomas 			if (gotd_proc_id == PROC_LISTEN) {
199 3efd8e31 2022-10-23 thomas 				if (strlcpy(gotd->unix_socket_path, $2,
200 3efd8e31 2022-10-23 thomas 				    sizeof(gotd->unix_socket_path)) >=
201 3efd8e31 2022-10-23 thomas 				    sizeof(gotd->unix_socket_path)) {
202 3efd8e31 2022-10-23 thomas 					yyerror("%s: unix socket path too long",
203 3efd8e31 2022-10-23 thomas 					    __func__);
204 3efd8e31 2022-10-23 thomas 					free($2);
205 3efd8e31 2022-10-23 thomas 					YYERROR;
206 3efd8e31 2022-10-23 thomas 				}
207 3efd8e31 2022-10-23 thomas 			}
208 3efd8e31 2022-10-23 thomas 			free($2);
209 3efd8e31 2022-10-23 thomas 		}
210 3efd8e31 2022-10-23 thomas 		| UNIX_GROUP STRING {
211 3efd8e31 2022-10-23 thomas 			if (strlcpy(gotd->unix_group_name, $2,
212 3efd8e31 2022-10-23 thomas 			    sizeof(gotd->unix_group_name)) >=
213 3efd8e31 2022-10-23 thomas 			    sizeof(gotd->unix_group_name)) {
214 3efd8e31 2022-10-23 thomas 				yyerror("%s: unix group name too long",
215 3efd8e31 2022-10-23 thomas 				    __func__);
216 3efd8e31 2022-10-23 thomas 				free($2);
217 3efd8e31 2022-10-23 thomas 				YYERROR;
218 3efd8e31 2022-10-23 thomas 			}
219 3efd8e31 2022-10-23 thomas 			free($2);
220 3efd8e31 2022-10-23 thomas 		}
221 3efd8e31 2022-10-23 thomas 		| USER STRING {
222 3efd8e31 2022-10-23 thomas 			if (strlcpy(gotd->user_name, $2,
223 3efd8e31 2022-10-23 thomas 			    sizeof(gotd->user_name)) >=
224 3efd8e31 2022-10-23 thomas 			    sizeof(gotd->user_name)) {
225 3efd8e31 2022-10-23 thomas 				yyerror("%s: user name too long", __func__);
226 3efd8e31 2022-10-23 thomas 				free($2);
227 3efd8e31 2022-10-23 thomas 				YYERROR;
228 3efd8e31 2022-10-23 thomas 			}
229 3efd8e31 2022-10-23 thomas 			free($2);
230 3efd8e31 2022-10-23 thomas 		}
231 0781db0e 2023-01-06 thomas 		| connection
232 3efd8e31 2022-10-23 thomas 		;
233 3efd8e31 2022-10-23 thomas 
234 0781db0e 2023-01-06 thomas connection	: CONNECTION '{' optnl conflags_l '}'
235 0781db0e 2023-01-06 thomas 		| CONNECTION conflags
236 0781db0e 2023-01-06 thomas 
237 0781db0e 2023-01-06 thomas conflags_l	: conflags optnl conflags_l
238 0781db0e 2023-01-06 thomas 		| conflags optnl
239 0781db0e 2023-01-06 thomas 		;
240 0781db0e 2023-01-06 thomas 
241 0781db0e 2023-01-06 thomas conflags	: REQUEST TIMEOUT timeout		{
242 912db690 2023-01-06 thomas 			if ($3.tv_sec <= 0) {
243 912db690 2023-01-06 thomas 				yyerror("invalid timeout: %lld", $3.tv_sec);
244 912db690 2023-01-06 thomas 				YYERROR;
245 912db690 2023-01-06 thomas 			}
246 0781db0e 2023-01-06 thomas 			memcpy(&gotd->request_timeout, &$3,
247 0781db0e 2023-01-06 thomas 			    sizeof(gotd->request_timeout));
248 0781db0e 2023-01-06 thomas 		}
249 0781db0e 2023-01-06 thomas 		| LIMIT USER STRING NUMBER	{
250 0781db0e 2023-01-06 thomas 			if (gotd_proc_id == PROC_LISTEN &&
251 0781db0e 2023-01-06 thomas 			    conf_limit_user_connections($3, $4) == -1) {
252 0781db0e 2023-01-06 thomas 				free($3);
253 0781db0e 2023-01-06 thomas 				YYERROR;
254 0781db0e 2023-01-06 thomas 			}
255 0781db0e 2023-01-06 thomas 			free($3);
256 0781db0e 2023-01-06 thomas 		}
257 0781db0e 2023-01-06 thomas 		;
258 0781db0e 2023-01-06 thomas 
259 3efd8e31 2022-10-23 thomas repository	: REPOSITORY STRING {
260 3efd8e31 2022-10-23 thomas 			struct gotd_repo *repo;
261 3efd8e31 2022-10-23 thomas 
262 3efd8e31 2022-10-23 thomas 			TAILQ_FOREACH(repo, &gotd->repos, entry) {
263 3efd8e31 2022-10-23 thomas 				if (strcmp(repo->name, $2) == 0) {
264 3efd8e31 2022-10-23 thomas 					yyerror("duplicate repository '%s'", $2);
265 3efd8e31 2022-10-23 thomas 					free($2);
266 3efd8e31 2022-10-23 thomas 					YYERROR;
267 3efd8e31 2022-10-23 thomas 				}
268 3efd8e31 2022-10-23 thomas 			}
269 3efd8e31 2022-10-23 thomas 
270 c669c489 2022-12-30 thomas 			if (gotd_proc_id == PROC_GOTD ||
271 c669c489 2022-12-30 thomas 			    gotd_proc_id == PROC_AUTH) {
272 3efd8e31 2022-10-23 thomas 				new_repo = conf_new_repo($2);
273 3efd8e31 2022-10-23 thomas 			}
274 3efd8e31 2022-10-23 thomas 			free($2);
275 3efd8e31 2022-10-23 thomas 		} '{' optnl repoopts2 '}' {
276 3efd8e31 2022-10-23 thomas 		}
277 3efd8e31 2022-10-23 thomas 		;
278 3efd8e31 2022-10-23 thomas 
279 3efd8e31 2022-10-23 thomas repoopts1	: PATH STRING {
280 c669c489 2022-12-30 thomas 			if (gotd_proc_id == PROC_GOTD ||
281 c669c489 2022-12-30 thomas 			    gotd_proc_id == PROC_AUTH) {
282 3efd8e31 2022-10-23 thomas 				if (!got_path_is_absolute($2)) {
283 3efd8e31 2022-10-23 thomas 					yyerror("%s: path %s is not absolute",
284 3efd8e31 2022-10-23 thomas 					    __func__, $2);
285 3efd8e31 2022-10-23 thomas 					free($2);
286 3efd8e31 2022-10-23 thomas 					YYERROR;
287 3efd8e31 2022-10-23 thomas 				}
288 3efd8e31 2022-10-23 thomas 				if (strlcpy(new_repo->path, $2,
289 3efd8e31 2022-10-23 thomas 				    sizeof(new_repo->path)) >=
290 3efd8e31 2022-10-23 thomas 				    sizeof(new_repo->path)) {
291 3efd8e31 2022-10-23 thomas 					yyerror("%s: path truncated", __func__);
292 3efd8e31 2022-10-23 thomas 					free($2);
293 3efd8e31 2022-10-23 thomas 					YYERROR;
294 3efd8e31 2022-10-23 thomas 				}
295 3efd8e31 2022-10-23 thomas 			}
296 3efd8e31 2022-10-23 thomas 			free($2);
297 729a7e24 2022-11-17 thomas 		}
298 729a7e24 2022-11-17 thomas 		| PERMIT RO STRING {
299 c669c489 2022-12-30 thomas 			if (gotd_proc_id == PROC_AUTH) {
300 729a7e24 2022-11-17 thomas 				conf_new_access_rule(new_repo,
301 729a7e24 2022-11-17 thomas 				    GOTD_ACCESS_PERMITTED, GOTD_AUTH_READ, $3);
302 729a7e24 2022-11-17 thomas 			}
303 729a7e24 2022-11-17 thomas 		}
304 729a7e24 2022-11-17 thomas 		| PERMIT RW STRING {
305 c669c489 2022-12-30 thomas 			if (gotd_proc_id == PROC_AUTH) {
306 729a7e24 2022-11-17 thomas 				conf_new_access_rule(new_repo,
307 729a7e24 2022-11-17 thomas 				    GOTD_ACCESS_PERMITTED,
308 729a7e24 2022-11-17 thomas 				    GOTD_AUTH_READ | GOTD_AUTH_WRITE, $3);
309 729a7e24 2022-11-17 thomas 			}
310 3efd8e31 2022-10-23 thomas 		}
311 729a7e24 2022-11-17 thomas 		| DENY STRING {
312 c669c489 2022-12-30 thomas 			if (gotd_proc_id == PROC_AUTH) {
313 729a7e24 2022-11-17 thomas 				conf_new_access_rule(new_repo,
314 729a7e24 2022-11-17 thomas 				    GOTD_ACCESS_DENIED, 0, $2);
315 729a7e24 2022-11-17 thomas 			}
316 729a7e24 2022-11-17 thomas 		}
317 3efd8e31 2022-10-23 thomas 		;
318 3efd8e31 2022-10-23 thomas 
319 3efd8e31 2022-10-23 thomas repoopts2	: repoopts2 repoopts1 nl
320 3efd8e31 2022-10-23 thomas 		| repoopts1 optnl
321 3efd8e31 2022-10-23 thomas 		;
322 3efd8e31 2022-10-23 thomas 
323 3efd8e31 2022-10-23 thomas nl		: '\n' optnl
324 3efd8e31 2022-10-23 thomas 		;
325 3efd8e31 2022-10-23 thomas 
326 3efd8e31 2022-10-23 thomas optnl		: '\n' optnl		/* zero or more newlines */
327 3efd8e31 2022-10-23 thomas 		| /* empty */
328 3efd8e31 2022-10-23 thomas 		;
329 3efd8e31 2022-10-23 thomas 
330 3efd8e31 2022-10-23 thomas %%
331 3efd8e31 2022-10-23 thomas 
332 3efd8e31 2022-10-23 thomas struct keywords {
333 3efd8e31 2022-10-23 thomas 	const char	*k_name;
334 3efd8e31 2022-10-23 thomas 	int		 k_val;
335 3efd8e31 2022-10-23 thomas };
336 3efd8e31 2022-10-23 thomas 
337 3efd8e31 2022-10-23 thomas int
338 3efd8e31 2022-10-23 thomas yyerror(const char *fmt, ...)
339 3efd8e31 2022-10-23 thomas {
340 3efd8e31 2022-10-23 thomas 	va_list ap;
341 3efd8e31 2022-10-23 thomas 	char *msg;
342 3efd8e31 2022-10-23 thomas 
343 3efd8e31 2022-10-23 thomas 	file->errors++;
344 3efd8e31 2022-10-23 thomas 	va_start(ap, fmt);
345 3efd8e31 2022-10-23 thomas 	if (vasprintf(&msg, fmt, ap) == -1)
346 3efd8e31 2022-10-23 thomas 		fatalx("yyerror vasprintf");
347 3efd8e31 2022-10-23 thomas 	va_end(ap);
348 3efd8e31 2022-10-23 thomas 	logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
349 3efd8e31 2022-10-23 thomas 	free(msg);
350 3efd8e31 2022-10-23 thomas 	return (0);
351 3efd8e31 2022-10-23 thomas }
352 3efd8e31 2022-10-23 thomas 
353 3efd8e31 2022-10-23 thomas int
354 3efd8e31 2022-10-23 thomas kw_cmp(const void *k, const void *e)
355 3efd8e31 2022-10-23 thomas {
356 3efd8e31 2022-10-23 thomas 	return (strcmp(k, ((const struct keywords *)e)->k_name));
357 3efd8e31 2022-10-23 thomas }
358 3efd8e31 2022-10-23 thomas 
359 3efd8e31 2022-10-23 thomas int
360 3efd8e31 2022-10-23 thomas lookup(char *s)
361 3efd8e31 2022-10-23 thomas {
362 3efd8e31 2022-10-23 thomas 	/* This has to be sorted always. */
363 3efd8e31 2022-10-23 thomas 	static const struct keywords keywords[] = {
364 0781db0e 2023-01-06 thomas 		{ "connection",			CONNECTION },
365 729a7e24 2022-11-17 thomas 		{ "deny",			DENY },
366 0781db0e 2023-01-06 thomas 		{ "limit",			LIMIT },
367 3efd8e31 2022-10-23 thomas 		{ "on",				ON },
368 3efd8e31 2022-10-23 thomas 		{ "path",			PATH },
369 729a7e24 2022-11-17 thomas 		{ "permit",			PERMIT },
370 3efd8e31 2022-10-23 thomas 		{ "repository",			REPOSITORY },
371 0781db0e 2023-01-06 thomas 		{ "request",			REQUEST },
372 729a7e24 2022-11-17 thomas 		{ "ro",				RO },
373 729a7e24 2022-11-17 thomas 		{ "rw",				RW },
374 0781db0e 2023-01-06 thomas 		{ "timeout",			TIMEOUT },
375 3efd8e31 2022-10-23 thomas 		{ "unix_group",			UNIX_GROUP },
376 3efd8e31 2022-10-23 thomas 		{ "unix_socket",		UNIX_SOCKET },
377 3efd8e31 2022-10-23 thomas 		{ "user",			USER },
378 3efd8e31 2022-10-23 thomas 	};
379 3efd8e31 2022-10-23 thomas 	const struct keywords *p;
380 3efd8e31 2022-10-23 thomas 
381 3efd8e31 2022-10-23 thomas 	p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
382 3efd8e31 2022-10-23 thomas 	    sizeof(keywords[0]), kw_cmp);
383 3efd8e31 2022-10-23 thomas 
384 3efd8e31 2022-10-23 thomas 	if (p)
385 3efd8e31 2022-10-23 thomas 		return (p->k_val);
386 3efd8e31 2022-10-23 thomas 	else
387 3efd8e31 2022-10-23 thomas 		return (STRING);
388 3efd8e31 2022-10-23 thomas }
389 3efd8e31 2022-10-23 thomas 
390 3efd8e31 2022-10-23 thomas #define MAXPUSHBACK	128
391 3efd8e31 2022-10-23 thomas 
392 3efd8e31 2022-10-23 thomas unsigned char *parsebuf;
393 3efd8e31 2022-10-23 thomas int parseindex;
394 3efd8e31 2022-10-23 thomas unsigned char pushback_buffer[MAXPUSHBACK];
395 3efd8e31 2022-10-23 thomas int pushback_index = 0;
396 3efd8e31 2022-10-23 thomas 
397 3efd8e31 2022-10-23 thomas int
398 3efd8e31 2022-10-23 thomas lgetc(int quotec)
399 3efd8e31 2022-10-23 thomas {
400 3efd8e31 2022-10-23 thomas 	int c, next;
401 3efd8e31 2022-10-23 thomas 
402 3efd8e31 2022-10-23 thomas 	if (parsebuf) {
403 3efd8e31 2022-10-23 thomas 		/* Read character from the parsebuffer instead of input. */
404 3efd8e31 2022-10-23 thomas 		if (parseindex >= 0) {
405 3efd8e31 2022-10-23 thomas 			c = parsebuf[parseindex++];
406 3efd8e31 2022-10-23 thomas 			if (c != '\0')
407 3efd8e31 2022-10-23 thomas 				return (c);
408 3efd8e31 2022-10-23 thomas 			parsebuf = NULL;
409 3efd8e31 2022-10-23 thomas 		} else
410 3efd8e31 2022-10-23 thomas 			parseindex++;
411 3efd8e31 2022-10-23 thomas 	}
412 3efd8e31 2022-10-23 thomas 
413 3efd8e31 2022-10-23 thomas 	if (pushback_index)
414 3efd8e31 2022-10-23 thomas 		return (pushback_buffer[--pushback_index]);
415 3efd8e31 2022-10-23 thomas 
416 3efd8e31 2022-10-23 thomas 	if (quotec) {
417 3efd8e31 2022-10-23 thomas 		c = getc(file->stream);
418 3efd8e31 2022-10-23 thomas 		if (c == EOF)
419 3efd8e31 2022-10-23 thomas 			yyerror("reached end of file while parsing "
420 3efd8e31 2022-10-23 thomas 			    "quoted string");
421 3efd8e31 2022-10-23 thomas 		return (c);
422 3efd8e31 2022-10-23 thomas 	}
423 3efd8e31 2022-10-23 thomas 
424 3efd8e31 2022-10-23 thomas 	c = getc(file->stream);
425 3efd8e31 2022-10-23 thomas 	while (c == '\\') {
426 3efd8e31 2022-10-23 thomas 		next = getc(file->stream);
427 3efd8e31 2022-10-23 thomas 		if (next != '\n') {
428 3efd8e31 2022-10-23 thomas 			c = next;
429 3efd8e31 2022-10-23 thomas 			break;
430 3efd8e31 2022-10-23 thomas 		}
431 3efd8e31 2022-10-23 thomas 		yylval.lineno = file->lineno;
432 3efd8e31 2022-10-23 thomas 		file->lineno++;
433 3efd8e31 2022-10-23 thomas 		c = getc(file->stream);
434 3efd8e31 2022-10-23 thomas 	}
435 3efd8e31 2022-10-23 thomas 
436 3efd8e31 2022-10-23 thomas 	return (c);
437 3efd8e31 2022-10-23 thomas }
438 3efd8e31 2022-10-23 thomas 
439 3efd8e31 2022-10-23 thomas int
440 3efd8e31 2022-10-23 thomas lungetc(int c)
441 3efd8e31 2022-10-23 thomas {
442 3efd8e31 2022-10-23 thomas 	if (c == EOF)
443 3efd8e31 2022-10-23 thomas 		return (EOF);
444 3efd8e31 2022-10-23 thomas 	if (parsebuf) {
445 3efd8e31 2022-10-23 thomas 		parseindex--;
446 3efd8e31 2022-10-23 thomas 		if (parseindex >= 0)
447 3efd8e31 2022-10-23 thomas 			return (c);
448 3efd8e31 2022-10-23 thomas 	}
449 3efd8e31 2022-10-23 thomas 	if (pushback_index < MAXPUSHBACK-1)
450 3efd8e31 2022-10-23 thomas 		return (pushback_buffer[pushback_index++] = c);
451 3efd8e31 2022-10-23 thomas 	else
452 3efd8e31 2022-10-23 thomas 		return (EOF);
453 3efd8e31 2022-10-23 thomas }
454 3efd8e31 2022-10-23 thomas 
455 3efd8e31 2022-10-23 thomas int
456 3efd8e31 2022-10-23 thomas findeol(void)
457 3efd8e31 2022-10-23 thomas {
458 3efd8e31 2022-10-23 thomas 	int c;
459 3efd8e31 2022-10-23 thomas 
460 3efd8e31 2022-10-23 thomas 	parsebuf = NULL;
461 3efd8e31 2022-10-23 thomas 
462 3efd8e31 2022-10-23 thomas 	/* Skip to either EOF or the first real EOL. */
463 3efd8e31 2022-10-23 thomas 	while (1) {
464 3efd8e31 2022-10-23 thomas 		if (pushback_index)
465 3efd8e31 2022-10-23 thomas 			c = pushback_buffer[--pushback_index];
466 3efd8e31 2022-10-23 thomas 		else
467 3efd8e31 2022-10-23 thomas 			c = lgetc(0);
468 3efd8e31 2022-10-23 thomas 		if (c == '\n') {
469 3efd8e31 2022-10-23 thomas 			file->lineno++;
470 3efd8e31 2022-10-23 thomas 			break;
471 3efd8e31 2022-10-23 thomas 		}
472 3efd8e31 2022-10-23 thomas 		if (c == EOF)
473 3efd8e31 2022-10-23 thomas 			break;
474 3efd8e31 2022-10-23 thomas 	}
475 3efd8e31 2022-10-23 thomas 	return (ERROR);
476 3efd8e31 2022-10-23 thomas }
477 3efd8e31 2022-10-23 thomas 
478 3efd8e31 2022-10-23 thomas int
479 3efd8e31 2022-10-23 thomas yylex(void)
480 3efd8e31 2022-10-23 thomas {
481 3efd8e31 2022-10-23 thomas 	unsigned char buf[8096];
482 3efd8e31 2022-10-23 thomas 	unsigned char *p, *val;
483 3efd8e31 2022-10-23 thomas 	int quotec, next, c;
484 3efd8e31 2022-10-23 thomas 	int token;
485 3efd8e31 2022-10-23 thomas 
486 3efd8e31 2022-10-23 thomas top:
487 3efd8e31 2022-10-23 thomas 	p = buf;
488 3efd8e31 2022-10-23 thomas 	c = lgetc(0);
489 3efd8e31 2022-10-23 thomas 	while (c == ' ' || c == '\t')
490 3efd8e31 2022-10-23 thomas 		c = lgetc(0); /* nothing */
491 3efd8e31 2022-10-23 thomas 
492 3efd8e31 2022-10-23 thomas 	yylval.lineno = file->lineno;
493 3efd8e31 2022-10-23 thomas 	if (c == '#') {
494 3efd8e31 2022-10-23 thomas 		c = lgetc(0);
495 3efd8e31 2022-10-23 thomas 		while (c != '\n' && c != EOF)
496 3efd8e31 2022-10-23 thomas 			c = lgetc(0); /* nothing */
497 3efd8e31 2022-10-23 thomas 	}
498 3efd8e31 2022-10-23 thomas 	if (c == '$' && parsebuf == NULL) {
499 3efd8e31 2022-10-23 thomas 		while (1) {
500 3efd8e31 2022-10-23 thomas 			c = lgetc(0);
501 3efd8e31 2022-10-23 thomas 			if (c == EOF)
502 3efd8e31 2022-10-23 thomas 				return (0);
503 3efd8e31 2022-10-23 thomas 
504 3efd8e31 2022-10-23 thomas 			if (p + 1 >= buf + sizeof(buf) - 1) {
505 3efd8e31 2022-10-23 thomas 				yyerror("string too long");
506 3efd8e31 2022-10-23 thomas 				return (findeol());
507 3efd8e31 2022-10-23 thomas 			}
508 3efd8e31 2022-10-23 thomas 			if (isalnum(c) || c == '_') {
509 3efd8e31 2022-10-23 thomas 				*p++ = c;
510 3efd8e31 2022-10-23 thomas 				continue;
511 3efd8e31 2022-10-23 thomas 			}
512 3efd8e31 2022-10-23 thomas 			*p = '\0';
513 3efd8e31 2022-10-23 thomas 			lungetc(c);
514 3efd8e31 2022-10-23 thomas 			break;
515 3efd8e31 2022-10-23 thomas 		}
516 3efd8e31 2022-10-23 thomas 		val = symget(buf);
517 3efd8e31 2022-10-23 thomas 		if (val == NULL) {
518 3efd8e31 2022-10-23 thomas 			yyerror("macro '%s' not defined", buf);
519 3efd8e31 2022-10-23 thomas 			return (findeol());
520 3efd8e31 2022-10-23 thomas 		}
521 3efd8e31 2022-10-23 thomas 		parsebuf = val;
522 3efd8e31 2022-10-23 thomas 		parseindex = 0;
523 3efd8e31 2022-10-23 thomas 		goto top;
524 3efd8e31 2022-10-23 thomas 	}
525 3efd8e31 2022-10-23 thomas 
526 3efd8e31 2022-10-23 thomas 	switch (c) {
527 3efd8e31 2022-10-23 thomas 	case '\'':
528 3efd8e31 2022-10-23 thomas 	case '"':
529 3efd8e31 2022-10-23 thomas 		quotec = c;
530 3efd8e31 2022-10-23 thomas 		while (1) {
531 3efd8e31 2022-10-23 thomas 			c = lgetc(quotec);
532 3efd8e31 2022-10-23 thomas 			if (c == EOF)
533 3efd8e31 2022-10-23 thomas 				return (0);
534 3efd8e31 2022-10-23 thomas 			if (c == '\n') {
535 3efd8e31 2022-10-23 thomas 				file->lineno++;
536 3efd8e31 2022-10-23 thomas 				continue;
537 3efd8e31 2022-10-23 thomas 			} else if (c == '\\') {
538 3efd8e31 2022-10-23 thomas 				next = lgetc(quotec);
539 3efd8e31 2022-10-23 thomas 				if (next == EOF)
540 3efd8e31 2022-10-23 thomas 					return (0);
541 3efd8e31 2022-10-23 thomas 				if (next == quotec || c == ' ' || c == '\t')
542 3efd8e31 2022-10-23 thomas 					c = next;
543 3efd8e31 2022-10-23 thomas 				else if (next == '\n') {
544 3efd8e31 2022-10-23 thomas 					file->lineno++;
545 3efd8e31 2022-10-23 thomas 					continue;
546 3efd8e31 2022-10-23 thomas 				} else
547 3efd8e31 2022-10-23 thomas 					lungetc(next);
548 3efd8e31 2022-10-23 thomas 			} else if (c == quotec) {
549 3efd8e31 2022-10-23 thomas 				*p = '\0';
550 3efd8e31 2022-10-23 thomas 				break;
551 3efd8e31 2022-10-23 thomas 			} else if (c == '\0') {
552 3efd8e31 2022-10-23 thomas 				yyerror("syntax error");
553 3efd8e31 2022-10-23 thomas 				return (findeol());
554 3efd8e31 2022-10-23 thomas 			}
555 3efd8e31 2022-10-23 thomas 			if (p + 1 >= buf + sizeof(buf) - 1) {
556 3efd8e31 2022-10-23 thomas 				yyerror("string too long");
557 3efd8e31 2022-10-23 thomas 				return (findeol());
558 3efd8e31 2022-10-23 thomas 			}
559 3efd8e31 2022-10-23 thomas 			*p++ = c;
560 3efd8e31 2022-10-23 thomas 		}
561 3efd8e31 2022-10-23 thomas 		yylval.v.string = strdup(buf);
562 3efd8e31 2022-10-23 thomas 		if (yylval.v.string == NULL)
563 3efd8e31 2022-10-23 thomas 			err(1, "yylex: strdup");
564 3efd8e31 2022-10-23 thomas 		return (STRING);
565 3efd8e31 2022-10-23 thomas 	}
566 3efd8e31 2022-10-23 thomas 
567 3efd8e31 2022-10-23 thomas #define allowed_to_end_number(x) \
568 3efd8e31 2022-10-23 thomas 	(isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
569 3efd8e31 2022-10-23 thomas 
570 3efd8e31 2022-10-23 thomas 	if (c == '-' || isdigit(c)) {
571 3efd8e31 2022-10-23 thomas 		do {
572 3efd8e31 2022-10-23 thomas 			*p++ = c;
573 3efd8e31 2022-10-23 thomas 			if ((unsigned)(p-buf) >= sizeof(buf)) {
574 3efd8e31 2022-10-23 thomas 				yyerror("string too long");
575 3efd8e31 2022-10-23 thomas 				return (findeol());
576 3efd8e31 2022-10-23 thomas 			}
577 3efd8e31 2022-10-23 thomas 			c = lgetc(0);
578 3efd8e31 2022-10-23 thomas 		} while (c != EOF && isdigit(c));
579 3efd8e31 2022-10-23 thomas 		lungetc(c);
580 3efd8e31 2022-10-23 thomas 		if (p == buf + 1 && buf[0] == '-')
581 3efd8e31 2022-10-23 thomas 			goto nodigits;
582 3efd8e31 2022-10-23 thomas 		if (c == EOF || allowed_to_end_number(c)) {
583 3efd8e31 2022-10-23 thomas 			const char *errstr = NULL;
584 3efd8e31 2022-10-23 thomas 
585 3efd8e31 2022-10-23 thomas 			*p = '\0';
586 3efd8e31 2022-10-23 thomas 			yylval.v.number = strtonum(buf, LLONG_MIN,
587 3efd8e31 2022-10-23 thomas 			    LLONG_MAX, &errstr);
588 3efd8e31 2022-10-23 thomas 			if (errstr) {
589 3efd8e31 2022-10-23 thomas 				yyerror("\"%s\" invalid number: %s",
590 3efd8e31 2022-10-23 thomas 				    buf, errstr);
591 3efd8e31 2022-10-23 thomas 				return (findeol());
592 3efd8e31 2022-10-23 thomas 			}
593 3efd8e31 2022-10-23 thomas 			return (NUMBER);
594 3efd8e31 2022-10-23 thomas 		} else {
595 3efd8e31 2022-10-23 thomas nodigits:
596 3efd8e31 2022-10-23 thomas 			while (p > buf + 1)
597 3efd8e31 2022-10-23 thomas 				lungetc(*--p);
598 3efd8e31 2022-10-23 thomas 			c = *--p;
599 3efd8e31 2022-10-23 thomas 			if (c == '-')
600 3efd8e31 2022-10-23 thomas 				return (c);
601 3efd8e31 2022-10-23 thomas 		}
602 3efd8e31 2022-10-23 thomas 	}
603 3efd8e31 2022-10-23 thomas 
604 3efd8e31 2022-10-23 thomas #define allowed_in_string(x) \
605 3efd8e31 2022-10-23 thomas 	(isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
606 3efd8e31 2022-10-23 thomas 	x != '{' && x != '}' && \
607 3efd8e31 2022-10-23 thomas 	x != '!' && x != '=' && x != '#' && \
608 3efd8e31 2022-10-23 thomas 	x != ','))
609 3efd8e31 2022-10-23 thomas 
610 3efd8e31 2022-10-23 thomas 	if (isalnum(c) || c == ':' || c == '_') {
611 3efd8e31 2022-10-23 thomas 		do {
612 3efd8e31 2022-10-23 thomas 			*p++ = c;
613 3efd8e31 2022-10-23 thomas 			if ((unsigned)(p-buf) >= sizeof(buf)) {
614 3efd8e31 2022-10-23 thomas 				yyerror("string too long");
615 3efd8e31 2022-10-23 thomas 				return (findeol());
616 3efd8e31 2022-10-23 thomas 			}
617 3efd8e31 2022-10-23 thomas 			c = lgetc(0);
618 3efd8e31 2022-10-23 thomas 		} while (c != EOF && (allowed_in_string(c)));
619 3efd8e31 2022-10-23 thomas 		lungetc(c);
620 3efd8e31 2022-10-23 thomas 		*p = '\0';
621 3efd8e31 2022-10-23 thomas 		token = lookup(buf);
622 3efd8e31 2022-10-23 thomas 		if (token == STRING) {
623 3efd8e31 2022-10-23 thomas 			yylval.v.string = strdup(buf);
624 3efd8e31 2022-10-23 thomas 			if (yylval.v.string == NULL)
625 3efd8e31 2022-10-23 thomas 				err(1, "yylex: strdup");
626 3efd8e31 2022-10-23 thomas 		}
627 3efd8e31 2022-10-23 thomas 		return (token);
628 3efd8e31 2022-10-23 thomas 	}
629 3efd8e31 2022-10-23 thomas 	if (c == '\n') {
630 3efd8e31 2022-10-23 thomas 		yylval.lineno = file->lineno;
631 3efd8e31 2022-10-23 thomas 		file->lineno++;
632 3efd8e31 2022-10-23 thomas 	}
633 3efd8e31 2022-10-23 thomas 	if (c == EOF)
634 3efd8e31 2022-10-23 thomas 		return (0);
635 3efd8e31 2022-10-23 thomas 	return (c);
636 3efd8e31 2022-10-23 thomas }
637 3efd8e31 2022-10-23 thomas 
638 3efd8e31 2022-10-23 thomas int
639 3efd8e31 2022-10-23 thomas check_file_secrecy(int fd, const char *fname)
640 3efd8e31 2022-10-23 thomas {
641 3efd8e31 2022-10-23 thomas 	struct stat st;
642 3efd8e31 2022-10-23 thomas 
643 3efd8e31 2022-10-23 thomas 	if (fstat(fd, &st)) {
644 3efd8e31 2022-10-23 thomas 		log_warn("cannot stat %s", fname);
645 3efd8e31 2022-10-23 thomas 		return (-1);
646 3efd8e31 2022-10-23 thomas 	}
647 3efd8e31 2022-10-23 thomas 	if (st.st_uid != 0 && st.st_uid != getuid()) {
648 3efd8e31 2022-10-23 thomas 		log_warnx("%s: owner not root or current user", fname);
649 3efd8e31 2022-10-23 thomas 		return (-1);
650 3efd8e31 2022-10-23 thomas 	}
651 3efd8e31 2022-10-23 thomas 	if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
652 3efd8e31 2022-10-23 thomas 		log_warnx("%s: group writable or world read/writable", fname);
653 3efd8e31 2022-10-23 thomas 		return (-1);
654 3efd8e31 2022-10-23 thomas 	}
655 3efd8e31 2022-10-23 thomas 	return (0);
656 3efd8e31 2022-10-23 thomas }
657 3efd8e31 2022-10-23 thomas 
658 3efd8e31 2022-10-23 thomas struct file *
659 3efd8e31 2022-10-23 thomas newfile(const char *name, int secret)
660 3efd8e31 2022-10-23 thomas {
661 3efd8e31 2022-10-23 thomas 	struct file *nfile;
662 3efd8e31 2022-10-23 thomas 
663 3efd8e31 2022-10-23 thomas 	nfile = calloc(1, sizeof(struct file));
664 3efd8e31 2022-10-23 thomas 	if (nfile == NULL) {
665 3efd8e31 2022-10-23 thomas 		log_warn("calloc");
666 3efd8e31 2022-10-23 thomas 		return (NULL);
667 3efd8e31 2022-10-23 thomas 	}
668 3efd8e31 2022-10-23 thomas 	nfile->name = strdup(name);
669 3efd8e31 2022-10-23 thomas 	if (nfile->name == NULL) {
670 3efd8e31 2022-10-23 thomas 		log_warn("strdup");
671 3efd8e31 2022-10-23 thomas 		free(nfile);
672 3efd8e31 2022-10-23 thomas 		return (NULL);
673 3efd8e31 2022-10-23 thomas 	}
674 3efd8e31 2022-10-23 thomas 	nfile->stream = fopen(nfile->name, "r");
675 3efd8e31 2022-10-23 thomas 	if (nfile->stream == NULL) {
676 3efd8e31 2022-10-23 thomas 		/* no warning, we don't require a conf file */
677 3efd8e31 2022-10-23 thomas 		free(nfile->name);
678 3efd8e31 2022-10-23 thomas 		free(nfile);
679 3efd8e31 2022-10-23 thomas 		return (NULL);
680 3efd8e31 2022-10-23 thomas 	} else if (secret &&
681 3efd8e31 2022-10-23 thomas 	    check_file_secrecy(fileno(nfile->stream), nfile->name)) {
682 3efd8e31 2022-10-23 thomas 		fclose(nfile->stream);
683 3efd8e31 2022-10-23 thomas 		free(nfile->name);
684 3efd8e31 2022-10-23 thomas 		free(nfile);
685 3efd8e31 2022-10-23 thomas 		return (NULL);
686 3efd8e31 2022-10-23 thomas 	}
687 3efd8e31 2022-10-23 thomas 	nfile->lineno = 1;
688 3efd8e31 2022-10-23 thomas 	return (nfile);
689 3efd8e31 2022-10-23 thomas }
690 3efd8e31 2022-10-23 thomas 
691 3efd8e31 2022-10-23 thomas static void
692 3efd8e31 2022-10-23 thomas closefile(struct file *xfile)
693 3efd8e31 2022-10-23 thomas {
694 3efd8e31 2022-10-23 thomas 	fclose(xfile->stream);
695 3efd8e31 2022-10-23 thomas 	free(xfile->name);
696 3efd8e31 2022-10-23 thomas 	free(xfile);
697 3efd8e31 2022-10-23 thomas }
698 3efd8e31 2022-10-23 thomas 
699 3efd8e31 2022-10-23 thomas int
700 3efd8e31 2022-10-23 thomas parse_config(const char *filename, enum gotd_procid proc_id,
701 3efd8e31 2022-10-23 thomas     struct gotd *env)
702 3efd8e31 2022-10-23 thomas {
703 3efd8e31 2022-10-23 thomas 	struct sym *sym, *next;
704 88f1bb6d 2023-01-02 thomas 	struct gotd_repo *repo;
705 3efd8e31 2022-10-23 thomas 
706 3efd8e31 2022-10-23 thomas 	memset(env, 0, sizeof(*env));
707 3efd8e31 2022-10-23 thomas 
708 3efd8e31 2022-10-23 thomas 	gotd = env;
709 3efd8e31 2022-10-23 thomas 	gotd_proc_id = proc_id;
710 3efd8e31 2022-10-23 thomas 	TAILQ_INIT(&gotd->repos);
711 3efd8e31 2022-10-23 thomas 
712 3efd8e31 2022-10-23 thomas 	/* Apply default values. */
713 3efd8e31 2022-10-23 thomas 	if (strlcpy(gotd->unix_socket_path, GOTD_UNIX_SOCKET,
714 3efd8e31 2022-10-23 thomas 	    sizeof(gotd->unix_socket_path)) >= sizeof(gotd->unix_socket_path)) {
715 3efd8e31 2022-10-23 thomas 		fprintf(stderr, "%s: unix socket path too long", __func__);
716 3efd8e31 2022-10-23 thomas 		return -1;
717 3efd8e31 2022-10-23 thomas 	}
718 3efd8e31 2022-10-23 thomas 	if (strlcpy(gotd->unix_group_name, GOTD_UNIX_GROUP,
719 3efd8e31 2022-10-23 thomas 	    sizeof(gotd->unix_group_name)) >= sizeof(gotd->unix_group_name)) {
720 3efd8e31 2022-10-23 thomas 		fprintf(stderr, "%s: unix group name too long", __func__);
721 3efd8e31 2022-10-23 thomas 		return -1;
722 3efd8e31 2022-10-23 thomas 	}
723 3efd8e31 2022-10-23 thomas 	if (strlcpy(gotd->user_name, GOTD_USER,
724 3efd8e31 2022-10-23 thomas 	    sizeof(gotd->user_name)) >= sizeof(gotd->user_name)) {
725 3efd8e31 2022-10-23 thomas 		fprintf(stderr, "%s: user name too long", __func__);
726 3efd8e31 2022-10-23 thomas 		return -1;
727 3efd8e31 2022-10-23 thomas 	}
728 0781db0e 2023-01-06 thomas 
729 0781db0e 2023-01-06 thomas 	gotd->request_timeout.tv_sec = GOTD_DEFAULT_REQUEST_TIMEOUT;
730 0781db0e 2023-01-06 thomas 	gotd->request_timeout.tv_usec = 0;
731 3efd8e31 2022-10-23 thomas 
732 3efd8e31 2022-10-23 thomas 	file = newfile(filename, 0);
733 3efd8e31 2022-10-23 thomas 	if (file == NULL) {
734 3efd8e31 2022-10-23 thomas 		/* just return, as we don't require a conf file */
735 3efd8e31 2022-10-23 thomas 		return (0);
736 3efd8e31 2022-10-23 thomas 	}
737 3efd8e31 2022-10-23 thomas 
738 3efd8e31 2022-10-23 thomas 	yyparse();
739 3efd8e31 2022-10-23 thomas 	errors = file->errors;
740 3efd8e31 2022-10-23 thomas 	closefile(file);
741 3efd8e31 2022-10-23 thomas 
742 3efd8e31 2022-10-23 thomas 	/* Free macros and check which have not been used. */
743 3efd8e31 2022-10-23 thomas 	TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
744 3efd8e31 2022-10-23 thomas 		if ((gotd->verbosity > 1) && !sym->used)
745 3efd8e31 2022-10-23 thomas 			fprintf(stderr, "warning: macro '%s' not used\n",
746 3efd8e31 2022-10-23 thomas 			    sym->nam);
747 3efd8e31 2022-10-23 thomas 		if (!sym->persist) {
748 3efd8e31 2022-10-23 thomas 			free(sym->nam);
749 3efd8e31 2022-10-23 thomas 			free(sym->val);
750 3efd8e31 2022-10-23 thomas 			TAILQ_REMOVE(&symhead, sym, entry);
751 3efd8e31 2022-10-23 thomas 			free(sym);
752 3efd8e31 2022-10-23 thomas 		}
753 3efd8e31 2022-10-23 thomas 	}
754 3efd8e31 2022-10-23 thomas 
755 3efd8e31 2022-10-23 thomas 	if (errors)
756 3efd8e31 2022-10-23 thomas 		return (-1);
757 3efd8e31 2022-10-23 thomas 
758 88f1bb6d 2023-01-02 thomas 	TAILQ_FOREACH(repo, &gotd->repos, entry) {
759 88f1bb6d 2023-01-02 thomas 		if (repo->path[0] == '\0') {
760 0cbf8de7 2023-01-02 thomas 			log_warnx("repository \"%s\": no path provided in "
761 0cbf8de7 2023-01-02 thomas 			    "configuration file", repo->name);
762 88f1bb6d 2023-01-02 thomas 			return (-1);
763 88f1bb6d 2023-01-02 thomas 		}
764 88f1bb6d 2023-01-02 thomas 	}
765 88f1bb6d 2023-01-02 thomas 
766 3efd8e31 2022-10-23 thomas 	return (0);
767 3efd8e31 2022-10-23 thomas }
768 3efd8e31 2022-10-23 thomas 
769 0781db0e 2023-01-06 thomas static int
770 0781db0e 2023-01-06 thomas uid_connection_limit_cmp(const void *pa, const void *pb)
771 0781db0e 2023-01-06 thomas {
772 0781db0e 2023-01-06 thomas 	const struct gotd_uid_connection_limit *a = pa, *b = pb;
773 0781db0e 2023-01-06 thomas 
774 0781db0e 2023-01-06 thomas 	if (a->uid < b->uid)
775 0781db0e 2023-01-06 thomas 		return -1;
776 0781db0e 2023-01-06 thomas 	else if (a->uid > b->uid);
777 0781db0e 2023-01-06 thomas 		return 1;
778 0781db0e 2023-01-06 thomas 
779 0781db0e 2023-01-06 thomas 	return 0;
780 0781db0e 2023-01-06 thomas }
781 0781db0e 2023-01-06 thomas 
782 0781db0e 2023-01-06 thomas static int
783 0781db0e 2023-01-06 thomas conf_limit_user_connections(const char *user, int maximum)
784 0781db0e 2023-01-06 thomas {
785 0781db0e 2023-01-06 thomas 	uid_t uid;
786 0781db0e 2023-01-06 thomas 	struct gotd_uid_connection_limit *limit;
787 0781db0e 2023-01-06 thomas 	size_t nlimits;
788 0781db0e 2023-01-06 thomas 
789 0781db0e 2023-01-06 thomas 	if (maximum < 1) {
790 0781db0e 2023-01-06 thomas 		yyerror("max connections cannot be smaller 1");
791 0781db0e 2023-01-06 thomas 		return -1;
792 0781db0e 2023-01-06 thomas 	}
793 0781db0e 2023-01-06 thomas 	if (maximum > GOTD_MAXCLIENTS) {
794 0781db0e 2023-01-06 thomas 		yyerror("max connections must be <= %d", GOTD_MAXCLIENTS);
795 0781db0e 2023-01-06 thomas 		return -1;
796 0781db0e 2023-01-06 thomas 	}
797 0781db0e 2023-01-06 thomas 
798 0781db0e 2023-01-06 thomas 	if (gotd_auth_parseuid(user, &uid) == -1) {
799 0781db0e 2023-01-06 thomas 		yyerror("%s: no such user", user);
800 0781db0e 2023-01-06 thomas 		return -1;
801 0781db0e 2023-01-06 thomas 	}
802 0781db0e 2023-01-06 thomas 
803 0781db0e 2023-01-06 thomas 	limit = gotd_find_uid_connection_limit(gotd->connection_limits,
804 0781db0e 2023-01-06 thomas 	    gotd->nconnection_limits, uid);
805 0781db0e 2023-01-06 thomas 	if (limit) {
806 0781db0e 2023-01-06 thomas 		limit->max_connections = maximum;
807 0781db0e 2023-01-06 thomas 		return 0;
808 0781db0e 2023-01-06 thomas 	}
809 0781db0e 2023-01-06 thomas 
810 0781db0e 2023-01-06 thomas 	limit = gotd->connection_limits;
811 0781db0e 2023-01-06 thomas 	nlimits = gotd->nconnection_limits + 1;
812 0781db0e 2023-01-06 thomas 	limit = reallocarray(limit, nlimits, sizeof(*limit));
813 0781db0e 2023-01-06 thomas 	if (limit == NULL)
814 0781db0e 2023-01-06 thomas 		fatal("reallocarray");
815 0781db0e 2023-01-06 thomas 
816 0781db0e 2023-01-06 thomas 	limit[nlimits - 1].uid = uid;
817 0781db0e 2023-01-06 thomas 	limit[nlimits - 1].max_connections = maximum;
818 0781db0e 2023-01-06 thomas 
819 0781db0e 2023-01-06 thomas 	gotd->connection_limits = limit;
820 0781db0e 2023-01-06 thomas 	gotd->nconnection_limits = nlimits;
821 0781db0e 2023-01-06 thomas 	qsort(gotd->connection_limits, gotd->nconnection_limits,
822 0781db0e 2023-01-06 thomas 	    sizeof(gotd->connection_limits[0]), uid_connection_limit_cmp);
823 0781db0e 2023-01-06 thomas 
824 0781db0e 2023-01-06 thomas 	return 0;
825 0781db0e 2023-01-06 thomas }
826 0781db0e 2023-01-06 thomas 
827 3efd8e31 2022-10-23 thomas static struct gotd_repo *
828 3efd8e31 2022-10-23 thomas conf_new_repo(const char *name)
829 3efd8e31 2022-10-23 thomas {
830 3efd8e31 2022-10-23 thomas 	struct gotd_repo *repo;
831 3efd8e31 2022-10-23 thomas 
832 a42b418b 2023-01-02 thomas 	if (name[0] == '\0') {
833 a42b418b 2023-01-02 thomas 		fatalx("syntax error: empty repository name found in %s",
834 a42b418b 2023-01-02 thomas 		    file->name);
835 a42b418b 2023-01-02 thomas 	}
836 a42b418b 2023-01-02 thomas 
837 0cbf8de7 2023-01-02 thomas 	if (strchr(name, '\n') != NULL)
838 0cbf8de7 2023-01-02 thomas 		fatalx("repository names must not contain linefeeds: %s", name);
839 3efd8e31 2022-10-23 thomas 
840 3efd8e31 2022-10-23 thomas 	repo = calloc(1, sizeof(*repo));
841 3efd8e31 2022-10-23 thomas 	if (repo == NULL)
842 3efd8e31 2022-10-23 thomas 		fatalx("%s: calloc", __func__);
843 3efd8e31 2022-10-23 thomas 
844 729a7e24 2022-11-17 thomas 	STAILQ_INIT(&repo->rules);
845 729a7e24 2022-11-17 thomas 
846 3efd8e31 2022-10-23 thomas 	if (strlcpy(repo->name, name, sizeof(repo->name)) >=
847 3efd8e31 2022-10-23 thomas 	    sizeof(repo->name))
848 3efd8e31 2022-10-23 thomas 		fatalx("%s: strlcpy", __func__);
849 3efd8e31 2022-10-23 thomas 
850 3efd8e31 2022-10-23 thomas 	TAILQ_INSERT_TAIL(&gotd->repos, repo, entry);
851 3efd8e31 2022-10-23 thomas 	gotd->nrepos++;
852 3efd8e31 2022-10-23 thomas 
853 3efd8e31 2022-10-23 thomas 	return repo;
854 3efd8e31 2022-10-23 thomas };
855 729a7e24 2022-11-17 thomas 
856 729a7e24 2022-11-17 thomas static void
857 729a7e24 2022-11-17 thomas conf_new_access_rule(struct gotd_repo *repo, enum gotd_access access,
858 729a7e24 2022-11-17 thomas     int authorization, char *identifier)
859 729a7e24 2022-11-17 thomas {
860 729a7e24 2022-11-17 thomas 	struct gotd_access_rule *rule;
861 729a7e24 2022-11-17 thomas 
862 729a7e24 2022-11-17 thomas 	rule = calloc(1, sizeof(*rule));
863 729a7e24 2022-11-17 thomas 	if (rule == NULL)
864 729a7e24 2022-11-17 thomas 		fatal("calloc");
865 3efd8e31 2022-10-23 thomas 
866 729a7e24 2022-11-17 thomas 	rule->access = access;
867 729a7e24 2022-11-17 thomas 	rule->authorization = authorization;
868 729a7e24 2022-11-17 thomas 	rule->identifier = identifier;
869 729a7e24 2022-11-17 thomas 
870 729a7e24 2022-11-17 thomas 	STAILQ_INSERT_TAIL(&repo->rules, rule, entry);
871 729a7e24 2022-11-17 thomas }
872 729a7e24 2022-11-17 thomas 
873 3efd8e31 2022-10-23 thomas int
874 3efd8e31 2022-10-23 thomas symset(const char *nam, const char *val, int persist)
875 3efd8e31 2022-10-23 thomas {
876 3efd8e31 2022-10-23 thomas 	struct sym *sym;
877 3efd8e31 2022-10-23 thomas 
878 3efd8e31 2022-10-23 thomas 	TAILQ_FOREACH(sym, &symhead, entry) {
879 3efd8e31 2022-10-23 thomas 		if (strcmp(nam, sym->nam) == 0)
880 3efd8e31 2022-10-23 thomas 			break;
881 3efd8e31 2022-10-23 thomas 	}
882 3efd8e31 2022-10-23 thomas 
883 3efd8e31 2022-10-23 thomas 	if (sym != NULL) {
884 3efd8e31 2022-10-23 thomas 		if (sym->persist == 1)
885 3efd8e31 2022-10-23 thomas 			return (0);
886 3efd8e31 2022-10-23 thomas 		else {
887 3efd8e31 2022-10-23 thomas 			free(sym->nam);
888 3efd8e31 2022-10-23 thomas 			free(sym->val);
889 3efd8e31 2022-10-23 thomas 			TAILQ_REMOVE(&symhead, sym, entry);
890 3efd8e31 2022-10-23 thomas 			free(sym);
891 3efd8e31 2022-10-23 thomas 		}
892 3efd8e31 2022-10-23 thomas 	}
893 3efd8e31 2022-10-23 thomas 	sym = calloc(1, sizeof(*sym));
894 3efd8e31 2022-10-23 thomas 	if (sym == NULL)
895 3efd8e31 2022-10-23 thomas 		return (-1);
896 3efd8e31 2022-10-23 thomas 
897 3efd8e31 2022-10-23 thomas 	sym->nam = strdup(nam);
898 3efd8e31 2022-10-23 thomas 	if (sym->nam == NULL) {
899 3efd8e31 2022-10-23 thomas 		free(sym);
900 3efd8e31 2022-10-23 thomas 		return (-1);
901 3efd8e31 2022-10-23 thomas 	}
902 3efd8e31 2022-10-23 thomas 	sym->val = strdup(val);
903 3efd8e31 2022-10-23 thomas 	if (sym->val == NULL) {
904 3efd8e31 2022-10-23 thomas 		free(sym->nam);
905 3efd8e31 2022-10-23 thomas 		free(sym);
906 3efd8e31 2022-10-23 thomas 		return (-1);
907 3efd8e31 2022-10-23 thomas 	}
908 3efd8e31 2022-10-23 thomas 	sym->used = 0;
909 3efd8e31 2022-10-23 thomas 	sym->persist = persist;
910 3efd8e31 2022-10-23 thomas 	TAILQ_INSERT_TAIL(&symhead, sym, entry);
911 3efd8e31 2022-10-23 thomas 	return (0);
912 3efd8e31 2022-10-23 thomas }
913 3efd8e31 2022-10-23 thomas 
914 3efd8e31 2022-10-23 thomas char *
915 3efd8e31 2022-10-23 thomas symget(const char *nam)
916 3efd8e31 2022-10-23 thomas {
917 3efd8e31 2022-10-23 thomas 	struct sym *sym;
918 3efd8e31 2022-10-23 thomas 
919 3efd8e31 2022-10-23 thomas 	TAILQ_FOREACH(sym, &symhead, entry) {
920 3efd8e31 2022-10-23 thomas 		if (strcmp(nam, sym->nam) == 0) {
921 3efd8e31 2022-10-23 thomas 			sym->used = 1;
922 3efd8e31 2022-10-23 thomas 			return (sym->val);
923 3efd8e31 2022-10-23 thomas 		}
924 3efd8e31 2022-10-23 thomas 	}
925 3efd8e31 2022-10-23 thomas 	return (NULL);
926 3efd8e31 2022-10-23 thomas }