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.
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.
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.
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>
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>
44 3efd8e31 2022-10-23 thomas #include "got_error.h"
45 3efd8e31 2022-10-23 thomas #include "got_path.h"
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"
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;
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);
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;
78 3efd8e31 2022-10-23 thomas int persist;
79 3efd8e31 2022-10-23 thomas char *nam;
80 3efd8e31 2022-10-23 thomas char *val;
83 3efd8e31 2022-10-23 thomas int symset(const char *, const char *, int);
84 3efd8e31 2022-10-23 thomas char *symget(const char *);
86 3efd8e31 2022-10-23 thomas static int errors;
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;
96 3efd8e31 2022-10-23 thomas typedef struct {
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;
102 3efd8e31 2022-10-23 thomas int lineno;
103 3efd8e31 2022-10-23 thomas } YYSTYPE;
107 f9a4feb6 2023-01-06 thomas %token PATH ERROR LISTEN ON USER REPOSITORY PERMIT DENY
108 0781db0e 2023-01-06 thomas %token RO RW CONNECTION LIMIT REQUEST TIMEOUT
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
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'
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)
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)
133 3efd8e31 2022-10-23 thomas yyerror("invalid boolean value '%s'", $1);
134 3efd8e31 2022-10-23 thomas free($1);
137 3efd8e31 2022-10-23 thomas free($1);
139 3efd8e31 2022-10-23 thomas | ON { $$ = 1; }
140 3efd8e31 2022-10-23 thomas | NUMBER { $$ = $1; }
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);
148 0781db0e 2023-01-06 thomas $$.tv_sec = $1;
149 0781db0e 2023-01-06 thomas $$.tv_usec = 0;
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;
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);
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';
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';
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';
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);
192 77d755e8 2023-01-06 thomas $$.tv_sec *= mul;
193 77d755e8 2023-01-06 thomas free($1);
197 f9a4feb6 2023-01-06 thomas main : LISTEN ON STRING {
198 7348ded8 2023-01-19 thomas if (!got_path_is_absolute($3))
199 7348ded8 2023-01-19 thomas yyerror("bad unix socket path \"%s\": "
200 7348ded8 2023-01-19 thomas "must be an absolute path", $3);
202 2b3d32a1 2022-12-30 thomas if (gotd_proc_id == PROC_LISTEN) {
203 f9a4feb6 2023-01-06 thomas if (strlcpy(gotd->unix_socket_path, $3,
204 3efd8e31 2022-10-23 thomas sizeof(gotd->unix_socket_path)) >=
205 3efd8e31 2022-10-23 thomas sizeof(gotd->unix_socket_path)) {
206 3efd8e31 2022-10-23 thomas yyerror("%s: unix socket path too long",
207 3efd8e31 2022-10-23 thomas __func__);
208 f9a4feb6 2023-01-06 thomas free($3);
212 f9a4feb6 2023-01-06 thomas free($3);
214 3efd8e31 2022-10-23 thomas | USER STRING {
215 3efd8e31 2022-10-23 thomas if (strlcpy(gotd->user_name, $2,
216 3efd8e31 2022-10-23 thomas sizeof(gotd->user_name)) >=
217 3efd8e31 2022-10-23 thomas sizeof(gotd->user_name)) {
218 3efd8e31 2022-10-23 thomas yyerror("%s: user name too long", __func__);
219 3efd8e31 2022-10-23 thomas free($2);
222 3efd8e31 2022-10-23 thomas free($2);
224 0781db0e 2023-01-06 thomas | connection
227 0781db0e 2023-01-06 thomas connection : CONNECTION '{' optnl conflags_l '}'
228 0781db0e 2023-01-06 thomas | CONNECTION conflags
230 0781db0e 2023-01-06 thomas conflags_l : conflags optnl conflags_l
231 0781db0e 2023-01-06 thomas | conflags optnl
234 0781db0e 2023-01-06 thomas conflags : REQUEST TIMEOUT timeout {
235 912db690 2023-01-06 thomas if ($3.tv_sec <= 0) {
236 912db690 2023-01-06 thomas yyerror("invalid timeout: %lld", $3.tv_sec);
239 0781db0e 2023-01-06 thomas memcpy(&gotd->request_timeout, &$3,
240 0781db0e 2023-01-06 thomas sizeof(gotd->request_timeout));
242 0781db0e 2023-01-06 thomas | LIMIT USER STRING NUMBER {
243 0781db0e 2023-01-06 thomas if (gotd_proc_id == PROC_LISTEN &&
244 0781db0e 2023-01-06 thomas conf_limit_user_connections($3, $4) == -1) {
245 0781db0e 2023-01-06 thomas free($3);
248 0781db0e 2023-01-06 thomas free($3);
252 3efd8e31 2022-10-23 thomas repository : REPOSITORY STRING {
253 3efd8e31 2022-10-23 thomas struct gotd_repo *repo;
255 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(repo, &gotd->repos, entry) {
256 3efd8e31 2022-10-23 thomas if (strcmp(repo->name, $2) == 0) {
257 3efd8e31 2022-10-23 thomas yyerror("duplicate repository '%s'", $2);
258 3efd8e31 2022-10-23 thomas free($2);
263 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_GOTD ||
264 c669c489 2022-12-30 thomas gotd_proc_id == PROC_AUTH) {
265 3efd8e31 2022-10-23 thomas new_repo = conf_new_repo($2);
267 3efd8e31 2022-10-23 thomas free($2);
268 3efd8e31 2022-10-23 thomas } '{' optnl repoopts2 '}' {
272 3efd8e31 2022-10-23 thomas repoopts1 : PATH STRING {
273 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_GOTD ||
274 c669c489 2022-12-30 thomas gotd_proc_id == PROC_AUTH) {
275 3efd8e31 2022-10-23 thomas if (!got_path_is_absolute($2)) {
276 3efd8e31 2022-10-23 thomas yyerror("%s: path %s is not absolute",
277 3efd8e31 2022-10-23 thomas __func__, $2);
278 3efd8e31 2022-10-23 thomas free($2);
281 fe6a8988 2023-01-08 thomas if (realpath($2, new_repo->path) == NULL) {
282 fe6a8988 2023-01-08 thomas yyerror("realpath %s: %s", $2, strerror(errno));
283 3efd8e31 2022-10-23 thomas free($2);
287 3efd8e31 2022-10-23 thomas free($2);
289 729a7e24 2022-11-17 thomas | PERMIT RO STRING {
290 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_AUTH) {
291 729a7e24 2022-11-17 thomas conf_new_access_rule(new_repo,
292 729a7e24 2022-11-17 thomas GOTD_ACCESS_PERMITTED, GOTD_AUTH_READ, $3);
295 729a7e24 2022-11-17 thomas | PERMIT RW STRING {
296 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_AUTH) {
297 729a7e24 2022-11-17 thomas conf_new_access_rule(new_repo,
298 729a7e24 2022-11-17 thomas GOTD_ACCESS_PERMITTED,
299 729a7e24 2022-11-17 thomas GOTD_AUTH_READ | GOTD_AUTH_WRITE, $3);
302 729a7e24 2022-11-17 thomas | DENY STRING {
303 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_AUTH) {
304 729a7e24 2022-11-17 thomas conf_new_access_rule(new_repo,
305 729a7e24 2022-11-17 thomas GOTD_ACCESS_DENIED, 0, $2);
310 3efd8e31 2022-10-23 thomas repoopts2 : repoopts2 repoopts1 nl
311 3efd8e31 2022-10-23 thomas | repoopts1 optnl
314 3efd8e31 2022-10-23 thomas nl : '\n' optnl
317 3efd8e31 2022-10-23 thomas optnl : '\n' optnl /* zero or more newlines */
318 3efd8e31 2022-10-23 thomas | /* empty */
323 3efd8e31 2022-10-23 thomas struct keywords {
324 3efd8e31 2022-10-23 thomas const char *k_name;
325 3efd8e31 2022-10-23 thomas int k_val;
329 3efd8e31 2022-10-23 thomas yyerror(const char *fmt, ...)
331 3efd8e31 2022-10-23 thomas va_list ap;
332 3efd8e31 2022-10-23 thomas char *msg;
334 3efd8e31 2022-10-23 thomas file->errors++;
335 3efd8e31 2022-10-23 thomas va_start(ap, fmt);
336 3efd8e31 2022-10-23 thomas if (vasprintf(&msg, fmt, ap) == -1)
337 3efd8e31 2022-10-23 thomas fatalx("yyerror vasprintf");
338 3efd8e31 2022-10-23 thomas va_end(ap);
339 3efd8e31 2022-10-23 thomas logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
340 3efd8e31 2022-10-23 thomas free(msg);
341 3efd8e31 2022-10-23 thomas return (0);
345 3efd8e31 2022-10-23 thomas kw_cmp(const void *k, const void *e)
347 3efd8e31 2022-10-23 thomas return (strcmp(k, ((const struct keywords *)e)->k_name));
351 3efd8e31 2022-10-23 thomas lookup(char *s)
353 3efd8e31 2022-10-23 thomas /* This has to be sorted always. */
354 3efd8e31 2022-10-23 thomas static const struct keywords keywords[] = {
355 0781db0e 2023-01-06 thomas { "connection", CONNECTION },
356 729a7e24 2022-11-17 thomas { "deny", DENY },
357 0781db0e 2023-01-06 thomas { "limit", LIMIT },
358 f9a4feb6 2023-01-06 thomas { "listen", LISTEN },
359 3efd8e31 2022-10-23 thomas { "on", ON },
360 3efd8e31 2022-10-23 thomas { "path", PATH },
361 729a7e24 2022-11-17 thomas { "permit", PERMIT },
362 3efd8e31 2022-10-23 thomas { "repository", REPOSITORY },
363 0781db0e 2023-01-06 thomas { "request", REQUEST },
364 729a7e24 2022-11-17 thomas { "ro", RO },
365 729a7e24 2022-11-17 thomas { "rw", RW },
366 0781db0e 2023-01-06 thomas { "timeout", TIMEOUT },
367 3efd8e31 2022-10-23 thomas { "user", USER },
369 3efd8e31 2022-10-23 thomas const struct keywords *p;
371 3efd8e31 2022-10-23 thomas p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
372 3efd8e31 2022-10-23 thomas sizeof(keywords[0]), kw_cmp);
375 3efd8e31 2022-10-23 thomas return (p->k_val);
377 3efd8e31 2022-10-23 thomas return (STRING);
380 3efd8e31 2022-10-23 thomas #define MAXPUSHBACK 128
382 3efd8e31 2022-10-23 thomas unsigned char *parsebuf;
383 3efd8e31 2022-10-23 thomas int parseindex;
384 3efd8e31 2022-10-23 thomas unsigned char pushback_buffer[MAXPUSHBACK];
385 3efd8e31 2022-10-23 thomas int pushback_index = 0;
388 3efd8e31 2022-10-23 thomas lgetc(int quotec)
390 3efd8e31 2022-10-23 thomas int c, next;
392 3efd8e31 2022-10-23 thomas if (parsebuf) {
393 3efd8e31 2022-10-23 thomas /* Read character from the parsebuffer instead of input. */
394 3efd8e31 2022-10-23 thomas if (parseindex >= 0) {
395 3efd8e31 2022-10-23 thomas c = parsebuf[parseindex++];
396 3efd8e31 2022-10-23 thomas if (c != '\0')
397 3efd8e31 2022-10-23 thomas return (c);
398 3efd8e31 2022-10-23 thomas parsebuf = NULL;
400 3efd8e31 2022-10-23 thomas parseindex++;
403 3efd8e31 2022-10-23 thomas if (pushback_index)
404 3efd8e31 2022-10-23 thomas return (pushback_buffer[--pushback_index]);
406 3efd8e31 2022-10-23 thomas if (quotec) {
407 3efd8e31 2022-10-23 thomas c = getc(file->stream);
408 3efd8e31 2022-10-23 thomas if (c == EOF)
409 3efd8e31 2022-10-23 thomas yyerror("reached end of file while parsing "
410 3efd8e31 2022-10-23 thomas "quoted string");
411 3efd8e31 2022-10-23 thomas return (c);
414 3efd8e31 2022-10-23 thomas c = getc(file->stream);
415 3efd8e31 2022-10-23 thomas while (c == '\\') {
416 3efd8e31 2022-10-23 thomas next = getc(file->stream);
417 3efd8e31 2022-10-23 thomas if (next != '\n') {
418 3efd8e31 2022-10-23 thomas c = next;
421 3efd8e31 2022-10-23 thomas yylval.lineno = file->lineno;
422 3efd8e31 2022-10-23 thomas file->lineno++;
423 3efd8e31 2022-10-23 thomas c = getc(file->stream);
426 3efd8e31 2022-10-23 thomas return (c);
430 3efd8e31 2022-10-23 thomas lungetc(int c)
432 3efd8e31 2022-10-23 thomas if (c == EOF)
433 3efd8e31 2022-10-23 thomas return (EOF);
434 3efd8e31 2022-10-23 thomas if (parsebuf) {
435 3efd8e31 2022-10-23 thomas parseindex--;
436 3efd8e31 2022-10-23 thomas if (parseindex >= 0)
437 3efd8e31 2022-10-23 thomas return (c);
439 3efd8e31 2022-10-23 thomas if (pushback_index < MAXPUSHBACK-1)
440 3efd8e31 2022-10-23 thomas return (pushback_buffer[pushback_index++] = c);
442 3efd8e31 2022-10-23 thomas return (EOF);
446 3efd8e31 2022-10-23 thomas findeol(void)
450 3efd8e31 2022-10-23 thomas parsebuf = NULL;
452 3efd8e31 2022-10-23 thomas /* Skip to either EOF or the first real EOL. */
453 3efd8e31 2022-10-23 thomas while (1) {
454 3efd8e31 2022-10-23 thomas if (pushback_index)
455 3efd8e31 2022-10-23 thomas c = pushback_buffer[--pushback_index];
457 3efd8e31 2022-10-23 thomas c = lgetc(0);
458 3efd8e31 2022-10-23 thomas if (c == '\n') {
459 3efd8e31 2022-10-23 thomas file->lineno++;
462 3efd8e31 2022-10-23 thomas if (c == EOF)
465 3efd8e31 2022-10-23 thomas return (ERROR);
469 3efd8e31 2022-10-23 thomas yylex(void)
471 3efd8e31 2022-10-23 thomas unsigned char buf[8096];
472 3efd8e31 2022-10-23 thomas unsigned char *p, *val;
473 3efd8e31 2022-10-23 thomas int quotec, next, c;
474 3efd8e31 2022-10-23 thomas int token;
478 3efd8e31 2022-10-23 thomas c = lgetc(0);
479 3efd8e31 2022-10-23 thomas while (c == ' ' || c == '\t')
480 3efd8e31 2022-10-23 thomas c = lgetc(0); /* nothing */
482 3efd8e31 2022-10-23 thomas yylval.lineno = file->lineno;
483 3efd8e31 2022-10-23 thomas if (c == '#') {
484 3efd8e31 2022-10-23 thomas c = lgetc(0);
485 3efd8e31 2022-10-23 thomas while (c != '\n' && c != EOF)
486 3efd8e31 2022-10-23 thomas c = lgetc(0); /* nothing */
488 3efd8e31 2022-10-23 thomas if (c == '$' && parsebuf == NULL) {
489 3efd8e31 2022-10-23 thomas while (1) {
490 3efd8e31 2022-10-23 thomas c = lgetc(0);
491 3efd8e31 2022-10-23 thomas if (c == EOF)
492 3efd8e31 2022-10-23 thomas return (0);
494 3efd8e31 2022-10-23 thomas if (p + 1 >= buf + sizeof(buf) - 1) {
495 3efd8e31 2022-10-23 thomas yyerror("string too long");
496 3efd8e31 2022-10-23 thomas return (findeol());
498 3efd8e31 2022-10-23 thomas if (isalnum(c) || c == '_') {
499 3efd8e31 2022-10-23 thomas *p++ = c;
500 3efd8e31 2022-10-23 thomas continue;
502 3efd8e31 2022-10-23 thomas *p = '\0';
503 3efd8e31 2022-10-23 thomas lungetc(c);
506 3efd8e31 2022-10-23 thomas val = symget(buf);
507 3efd8e31 2022-10-23 thomas if (val == NULL) {
508 3efd8e31 2022-10-23 thomas yyerror("macro '%s' not defined", buf);
509 3efd8e31 2022-10-23 thomas return (findeol());
511 3efd8e31 2022-10-23 thomas parsebuf = val;
512 3efd8e31 2022-10-23 thomas parseindex = 0;
513 3efd8e31 2022-10-23 thomas goto top;
516 3efd8e31 2022-10-23 thomas switch (c) {
517 3efd8e31 2022-10-23 thomas case '\'':
518 3efd8e31 2022-10-23 thomas case '"':
519 3efd8e31 2022-10-23 thomas quotec = c;
520 3efd8e31 2022-10-23 thomas while (1) {
521 3efd8e31 2022-10-23 thomas c = lgetc(quotec);
522 3efd8e31 2022-10-23 thomas if (c == EOF)
523 3efd8e31 2022-10-23 thomas return (0);
524 3efd8e31 2022-10-23 thomas if (c == '\n') {
525 3efd8e31 2022-10-23 thomas file->lineno++;
526 3efd8e31 2022-10-23 thomas continue;
527 3efd8e31 2022-10-23 thomas } else if (c == '\\') {
528 3efd8e31 2022-10-23 thomas next = lgetc(quotec);
529 3efd8e31 2022-10-23 thomas if (next == EOF)
530 3efd8e31 2022-10-23 thomas return (0);
531 3efd8e31 2022-10-23 thomas if (next == quotec || c == ' ' || c == '\t')
532 3efd8e31 2022-10-23 thomas c = next;
533 3efd8e31 2022-10-23 thomas else if (next == '\n') {
534 3efd8e31 2022-10-23 thomas file->lineno++;
535 3efd8e31 2022-10-23 thomas continue;
537 3efd8e31 2022-10-23 thomas lungetc(next);
538 3efd8e31 2022-10-23 thomas } else if (c == quotec) {
539 3efd8e31 2022-10-23 thomas *p = '\0';
541 3efd8e31 2022-10-23 thomas } else if (c == '\0') {
542 3efd8e31 2022-10-23 thomas yyerror("syntax error");
543 3efd8e31 2022-10-23 thomas return (findeol());
545 3efd8e31 2022-10-23 thomas if (p + 1 >= buf + sizeof(buf) - 1) {
546 3efd8e31 2022-10-23 thomas yyerror("string too long");
547 3efd8e31 2022-10-23 thomas return (findeol());
549 3efd8e31 2022-10-23 thomas *p++ = c;
551 3efd8e31 2022-10-23 thomas yylval.v.string = strdup(buf);
552 3efd8e31 2022-10-23 thomas if (yylval.v.string == NULL)
553 3efd8e31 2022-10-23 thomas err(1, "yylex: strdup");
554 3efd8e31 2022-10-23 thomas return (STRING);
557 3efd8e31 2022-10-23 thomas #define allowed_to_end_number(x) \
558 3efd8e31 2022-10-23 thomas (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
560 3efd8e31 2022-10-23 thomas if (c == '-' || isdigit(c)) {
562 3efd8e31 2022-10-23 thomas *p++ = c;
563 3efd8e31 2022-10-23 thomas if ((unsigned)(p-buf) >= sizeof(buf)) {
564 3efd8e31 2022-10-23 thomas yyerror("string too long");
565 3efd8e31 2022-10-23 thomas return (findeol());
567 3efd8e31 2022-10-23 thomas c = lgetc(0);
568 3efd8e31 2022-10-23 thomas } while (c != EOF && isdigit(c));
569 3efd8e31 2022-10-23 thomas lungetc(c);
570 3efd8e31 2022-10-23 thomas if (p == buf + 1 && buf[0] == '-')
571 3efd8e31 2022-10-23 thomas goto nodigits;
572 3efd8e31 2022-10-23 thomas if (c == EOF || allowed_to_end_number(c)) {
573 3efd8e31 2022-10-23 thomas const char *errstr = NULL;
575 3efd8e31 2022-10-23 thomas *p = '\0';
576 3efd8e31 2022-10-23 thomas yylval.v.number = strtonum(buf, LLONG_MIN,
577 3efd8e31 2022-10-23 thomas LLONG_MAX, &errstr);
578 3efd8e31 2022-10-23 thomas if (errstr) {
579 3efd8e31 2022-10-23 thomas yyerror("\"%s\" invalid number: %s",
580 3efd8e31 2022-10-23 thomas buf, errstr);
581 3efd8e31 2022-10-23 thomas return (findeol());
583 3efd8e31 2022-10-23 thomas return (NUMBER);
585 3efd8e31 2022-10-23 thomas nodigits:
586 3efd8e31 2022-10-23 thomas while (p > buf + 1)
587 3efd8e31 2022-10-23 thomas lungetc(*--p);
588 3efd8e31 2022-10-23 thomas c = *--p;
589 3efd8e31 2022-10-23 thomas if (c == '-')
590 3efd8e31 2022-10-23 thomas return (c);
594 3efd8e31 2022-10-23 thomas #define allowed_in_string(x) \
595 3efd8e31 2022-10-23 thomas (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
596 3efd8e31 2022-10-23 thomas x != '{' && x != '}' && \
597 3efd8e31 2022-10-23 thomas x != '!' && x != '=' && x != '#' && \
598 3efd8e31 2022-10-23 thomas x != ','))
600 3efd8e31 2022-10-23 thomas if (isalnum(c) || c == ':' || c == '_') {
602 3efd8e31 2022-10-23 thomas *p++ = c;
603 3efd8e31 2022-10-23 thomas if ((unsigned)(p-buf) >= sizeof(buf)) {
604 3efd8e31 2022-10-23 thomas yyerror("string too long");
605 3efd8e31 2022-10-23 thomas return (findeol());
607 3efd8e31 2022-10-23 thomas c = lgetc(0);
608 3efd8e31 2022-10-23 thomas } while (c != EOF && (allowed_in_string(c)));
609 3efd8e31 2022-10-23 thomas lungetc(c);
610 3efd8e31 2022-10-23 thomas *p = '\0';
611 3efd8e31 2022-10-23 thomas token = lookup(buf);
612 3efd8e31 2022-10-23 thomas if (token == STRING) {
613 3efd8e31 2022-10-23 thomas yylval.v.string = strdup(buf);
614 3efd8e31 2022-10-23 thomas if (yylval.v.string == NULL)
615 3efd8e31 2022-10-23 thomas err(1, "yylex: strdup");
617 3efd8e31 2022-10-23 thomas return (token);
619 3efd8e31 2022-10-23 thomas if (c == '\n') {
620 3efd8e31 2022-10-23 thomas yylval.lineno = file->lineno;
621 3efd8e31 2022-10-23 thomas file->lineno++;
623 3efd8e31 2022-10-23 thomas if (c == EOF)
624 3efd8e31 2022-10-23 thomas return (0);
625 3efd8e31 2022-10-23 thomas return (c);
629 3efd8e31 2022-10-23 thomas check_file_secrecy(int fd, const char *fname)
631 3efd8e31 2022-10-23 thomas struct stat st;
633 3efd8e31 2022-10-23 thomas if (fstat(fd, &st)) {
634 3efd8e31 2022-10-23 thomas log_warn("cannot stat %s", fname);
635 3efd8e31 2022-10-23 thomas return (-1);
637 3efd8e31 2022-10-23 thomas if (st.st_uid != 0 && st.st_uid != getuid()) {
638 3efd8e31 2022-10-23 thomas log_warnx("%s: owner not root or current user", fname);
639 3efd8e31 2022-10-23 thomas return (-1);
641 3efd8e31 2022-10-23 thomas if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
642 3efd8e31 2022-10-23 thomas log_warnx("%s: group writable or world read/writable", fname);
643 3efd8e31 2022-10-23 thomas return (-1);
645 3efd8e31 2022-10-23 thomas return (0);
648 3efd8e31 2022-10-23 thomas struct file *
649 3efd8e31 2022-10-23 thomas newfile(const char *name, int secret)
651 3efd8e31 2022-10-23 thomas struct file *nfile;
653 3efd8e31 2022-10-23 thomas nfile = calloc(1, sizeof(struct file));
654 3efd8e31 2022-10-23 thomas if (nfile == NULL) {
655 3efd8e31 2022-10-23 thomas log_warn("calloc");
656 3efd8e31 2022-10-23 thomas return (NULL);
658 3efd8e31 2022-10-23 thomas nfile->name = strdup(name);
659 3efd8e31 2022-10-23 thomas if (nfile->name == NULL) {
660 3efd8e31 2022-10-23 thomas log_warn("strdup");
661 3efd8e31 2022-10-23 thomas free(nfile);
662 3efd8e31 2022-10-23 thomas return (NULL);
664 3efd8e31 2022-10-23 thomas nfile->stream = fopen(nfile->name, "r");
665 3efd8e31 2022-10-23 thomas if (nfile->stream == NULL) {
666 3efd8e31 2022-10-23 thomas /* no warning, we don't require a conf file */
667 3efd8e31 2022-10-23 thomas free(nfile->name);
668 3efd8e31 2022-10-23 thomas free(nfile);
669 3efd8e31 2022-10-23 thomas return (NULL);
670 3efd8e31 2022-10-23 thomas } else if (secret &&
671 3efd8e31 2022-10-23 thomas check_file_secrecy(fileno(nfile->stream), nfile->name)) {
672 3efd8e31 2022-10-23 thomas fclose(nfile->stream);
673 3efd8e31 2022-10-23 thomas free(nfile->name);
674 3efd8e31 2022-10-23 thomas free(nfile);
675 3efd8e31 2022-10-23 thomas return (NULL);
677 3efd8e31 2022-10-23 thomas nfile->lineno = 1;
678 3efd8e31 2022-10-23 thomas return (nfile);
681 3efd8e31 2022-10-23 thomas static void
682 3efd8e31 2022-10-23 thomas closefile(struct file *xfile)
684 3efd8e31 2022-10-23 thomas fclose(xfile->stream);
685 3efd8e31 2022-10-23 thomas free(xfile->name);
686 3efd8e31 2022-10-23 thomas free(xfile);
690 3efd8e31 2022-10-23 thomas parse_config(const char *filename, enum gotd_procid proc_id,
691 3efd8e31 2022-10-23 thomas struct gotd *env)
693 3efd8e31 2022-10-23 thomas struct sym *sym, *next;
694 88f1bb6d 2023-01-02 thomas struct gotd_repo *repo;
696 3efd8e31 2022-10-23 thomas memset(env, 0, sizeof(*env));
698 3efd8e31 2022-10-23 thomas gotd = env;
699 3efd8e31 2022-10-23 thomas gotd_proc_id = proc_id;
700 3efd8e31 2022-10-23 thomas TAILQ_INIT(&gotd->repos);
702 3efd8e31 2022-10-23 thomas /* Apply default values. */
703 3efd8e31 2022-10-23 thomas if (strlcpy(gotd->unix_socket_path, GOTD_UNIX_SOCKET,
704 3efd8e31 2022-10-23 thomas sizeof(gotd->unix_socket_path)) >= sizeof(gotd->unix_socket_path)) {
705 3efd8e31 2022-10-23 thomas fprintf(stderr, "%s: unix socket path too long", __func__);
706 3efd8e31 2022-10-23 thomas return -1;
708 3efd8e31 2022-10-23 thomas if (strlcpy(gotd->user_name, GOTD_USER,
709 3efd8e31 2022-10-23 thomas sizeof(gotd->user_name)) >= sizeof(gotd->user_name)) {
710 3efd8e31 2022-10-23 thomas fprintf(stderr, "%s: user name too long", __func__);
711 3efd8e31 2022-10-23 thomas return -1;
714 0781db0e 2023-01-06 thomas gotd->request_timeout.tv_sec = GOTD_DEFAULT_REQUEST_TIMEOUT;
715 0781db0e 2023-01-06 thomas gotd->request_timeout.tv_usec = 0;
717 3efd8e31 2022-10-23 thomas file = newfile(filename, 0);
718 3efd8e31 2022-10-23 thomas if (file == NULL) {
719 3efd8e31 2022-10-23 thomas /* just return, as we don't require a conf file */
720 3efd8e31 2022-10-23 thomas return (0);
723 3efd8e31 2022-10-23 thomas yyparse();
724 3efd8e31 2022-10-23 thomas errors = file->errors;
725 3efd8e31 2022-10-23 thomas closefile(file);
727 3efd8e31 2022-10-23 thomas /* Free macros and check which have not been used. */
728 3efd8e31 2022-10-23 thomas TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
729 3efd8e31 2022-10-23 thomas if ((gotd->verbosity > 1) && !sym->used)
730 3efd8e31 2022-10-23 thomas fprintf(stderr, "warning: macro '%s' not used\n",
731 3efd8e31 2022-10-23 thomas sym->nam);
732 3efd8e31 2022-10-23 thomas if (!sym->persist) {
733 3efd8e31 2022-10-23 thomas free(sym->nam);
734 3efd8e31 2022-10-23 thomas free(sym->val);
735 3efd8e31 2022-10-23 thomas TAILQ_REMOVE(&symhead, sym, entry);
736 3efd8e31 2022-10-23 thomas free(sym);
740 3efd8e31 2022-10-23 thomas if (errors)
741 3efd8e31 2022-10-23 thomas return (-1);
743 88f1bb6d 2023-01-02 thomas TAILQ_FOREACH(repo, &gotd->repos, entry) {
744 88f1bb6d 2023-01-02 thomas if (repo->path[0] == '\0') {
745 0cbf8de7 2023-01-02 thomas log_warnx("repository \"%s\": no path provided in "
746 0cbf8de7 2023-01-02 thomas "configuration file", repo->name);
747 88f1bb6d 2023-01-02 thomas return (-1);
751 4d24b1fd 2023-01-19 thomas if (proc_id == PROC_GOTD && TAILQ_EMPTY(&gotd->repos)) {
752 4d24b1fd 2023-01-19 thomas log_warnx("no repository defined in configuration file");
753 4d24b1fd 2023-01-19 thomas return (-1);
756 3efd8e31 2022-10-23 thomas return (0);
759 0781db0e 2023-01-06 thomas static int
760 0781db0e 2023-01-06 thomas uid_connection_limit_cmp(const void *pa, const void *pb)
762 0781db0e 2023-01-06 thomas const struct gotd_uid_connection_limit *a = pa, *b = pb;
764 0781db0e 2023-01-06 thomas if (a->uid < b->uid)
765 0781db0e 2023-01-06 thomas return -1;
766 0781db0e 2023-01-06 thomas else if (a->uid > b->uid);
767 0781db0e 2023-01-06 thomas return 1;
769 0781db0e 2023-01-06 thomas return 0;
772 0781db0e 2023-01-06 thomas static int
773 0781db0e 2023-01-06 thomas conf_limit_user_connections(const char *user, int maximum)
775 0781db0e 2023-01-06 thomas uid_t uid;
776 0781db0e 2023-01-06 thomas struct gotd_uid_connection_limit *limit;
777 0781db0e 2023-01-06 thomas size_t nlimits;
779 0781db0e 2023-01-06 thomas if (maximum < 1) {
780 0781db0e 2023-01-06 thomas yyerror("max connections cannot be smaller 1");
781 0781db0e 2023-01-06 thomas return -1;
783 0781db0e 2023-01-06 thomas if (maximum > GOTD_MAXCLIENTS) {
784 0781db0e 2023-01-06 thomas yyerror("max connections must be <= %d", GOTD_MAXCLIENTS);
785 0781db0e 2023-01-06 thomas return -1;
788 0781db0e 2023-01-06 thomas if (gotd_auth_parseuid(user, &uid) == -1) {
789 0781db0e 2023-01-06 thomas yyerror("%s: no such user", user);
790 0781db0e 2023-01-06 thomas return -1;
793 0781db0e 2023-01-06 thomas limit = gotd_find_uid_connection_limit(gotd->connection_limits,
794 0781db0e 2023-01-06 thomas gotd->nconnection_limits, uid);
795 0781db0e 2023-01-06 thomas if (limit) {
796 0781db0e 2023-01-06 thomas limit->max_connections = maximum;
797 0781db0e 2023-01-06 thomas return 0;
800 0781db0e 2023-01-06 thomas limit = gotd->connection_limits;
801 0781db0e 2023-01-06 thomas nlimits = gotd->nconnection_limits + 1;
802 0781db0e 2023-01-06 thomas limit = reallocarray(limit, nlimits, sizeof(*limit));
803 0781db0e 2023-01-06 thomas if (limit == NULL)
804 0781db0e 2023-01-06 thomas fatal("reallocarray");
806 0781db0e 2023-01-06 thomas limit[nlimits - 1].uid = uid;
807 0781db0e 2023-01-06 thomas limit[nlimits - 1].max_connections = maximum;
809 0781db0e 2023-01-06 thomas gotd->connection_limits = limit;
810 0781db0e 2023-01-06 thomas gotd->nconnection_limits = nlimits;
811 0781db0e 2023-01-06 thomas qsort(gotd->connection_limits, gotd->nconnection_limits,
812 0781db0e 2023-01-06 thomas sizeof(gotd->connection_limits[0]), uid_connection_limit_cmp);
814 0781db0e 2023-01-06 thomas return 0;
817 3efd8e31 2022-10-23 thomas static struct gotd_repo *
818 3efd8e31 2022-10-23 thomas conf_new_repo(const char *name)
820 3efd8e31 2022-10-23 thomas struct gotd_repo *repo;
822 a42b418b 2023-01-02 thomas if (name[0] == '\0') {
823 a42b418b 2023-01-02 thomas fatalx("syntax error: empty repository name found in %s",
824 a42b418b 2023-01-02 thomas file->name);
827 0cbf8de7 2023-01-02 thomas if (strchr(name, '\n') != NULL)
828 0cbf8de7 2023-01-02 thomas fatalx("repository names must not contain linefeeds: %s", name);
830 3efd8e31 2022-10-23 thomas repo = calloc(1, sizeof(*repo));
831 3efd8e31 2022-10-23 thomas if (repo == NULL)
832 3efd8e31 2022-10-23 thomas fatalx("%s: calloc", __func__);
834 729a7e24 2022-11-17 thomas STAILQ_INIT(&repo->rules);
836 3efd8e31 2022-10-23 thomas if (strlcpy(repo->name, name, sizeof(repo->name)) >=
837 3efd8e31 2022-10-23 thomas sizeof(repo->name))
838 3efd8e31 2022-10-23 thomas fatalx("%s: strlcpy", __func__);
840 3efd8e31 2022-10-23 thomas TAILQ_INSERT_TAIL(&gotd->repos, repo, entry);
841 3efd8e31 2022-10-23 thomas gotd->nrepos++;
843 3efd8e31 2022-10-23 thomas return repo;
846 729a7e24 2022-11-17 thomas static void
847 729a7e24 2022-11-17 thomas conf_new_access_rule(struct gotd_repo *repo, enum gotd_access access,
848 729a7e24 2022-11-17 thomas int authorization, char *identifier)
850 729a7e24 2022-11-17 thomas struct gotd_access_rule *rule;
852 729a7e24 2022-11-17 thomas rule = calloc(1, sizeof(*rule));
853 729a7e24 2022-11-17 thomas if (rule == NULL)
854 729a7e24 2022-11-17 thomas fatal("calloc");
856 729a7e24 2022-11-17 thomas rule->access = access;
857 729a7e24 2022-11-17 thomas rule->authorization = authorization;
858 729a7e24 2022-11-17 thomas rule->identifier = identifier;
860 729a7e24 2022-11-17 thomas STAILQ_INSERT_TAIL(&repo->rules, rule, entry);
864 3efd8e31 2022-10-23 thomas symset(const char *nam, const char *val, int persist)
866 3efd8e31 2022-10-23 thomas struct sym *sym;
868 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(sym, &symhead, entry) {
869 3efd8e31 2022-10-23 thomas if (strcmp(nam, sym->nam) == 0)
873 3efd8e31 2022-10-23 thomas if (sym != NULL) {
874 3efd8e31 2022-10-23 thomas if (sym->persist == 1)
875 3efd8e31 2022-10-23 thomas return (0);
877 3efd8e31 2022-10-23 thomas free(sym->nam);
878 3efd8e31 2022-10-23 thomas free(sym->val);
879 3efd8e31 2022-10-23 thomas TAILQ_REMOVE(&symhead, sym, entry);
880 3efd8e31 2022-10-23 thomas free(sym);
883 3efd8e31 2022-10-23 thomas sym = calloc(1, sizeof(*sym));
884 3efd8e31 2022-10-23 thomas if (sym == NULL)
885 3efd8e31 2022-10-23 thomas return (-1);
887 3efd8e31 2022-10-23 thomas sym->nam = strdup(nam);
888 3efd8e31 2022-10-23 thomas if (sym->nam == NULL) {
889 3efd8e31 2022-10-23 thomas free(sym);
890 3efd8e31 2022-10-23 thomas return (-1);
892 3efd8e31 2022-10-23 thomas sym->val = strdup(val);
893 3efd8e31 2022-10-23 thomas if (sym->val == NULL) {
894 3efd8e31 2022-10-23 thomas free(sym->nam);
895 3efd8e31 2022-10-23 thomas free(sym);
896 3efd8e31 2022-10-23 thomas return (-1);
898 3efd8e31 2022-10-23 thomas sym->used = 0;
899 3efd8e31 2022-10-23 thomas sym->persist = persist;
900 3efd8e31 2022-10-23 thomas TAILQ_INSERT_TAIL(&symhead, sym, entry);
901 3efd8e31 2022-10-23 thomas return (0);
905 3efd8e31 2022-10-23 thomas symget(const char *nam)
907 3efd8e31 2022-10-23 thomas struct sym *sym;
909 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(sym, &symhead, entry) {
910 3efd8e31 2022-10-23 thomas if (strcmp(nam, sym->nam) == 0) {
911 3efd8e31 2022-10-23 thomas sym->used = 1;
912 3efd8e31 2022-10-23 thomas return (sym->val);
915 3efd8e31 2022-10-23 thomas return (NULL);
