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 2b3d32a1 2022-12-30 thomas if (gotd_proc_id == PROC_LISTEN) {
199 f9a4feb6 2023-01-06 thomas if (strlcpy(gotd->unix_socket_path, $3,
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 f9a4feb6 2023-01-06 thomas free($3);
208 f9a4feb6 2023-01-06 thomas free($3);
210 3efd8e31 2022-10-23 thomas | USER STRING {
211 3efd8e31 2022-10-23 thomas if (strlcpy(gotd->user_name, $2,
212 3efd8e31 2022-10-23 thomas sizeof(gotd->user_name)) >=
213 3efd8e31 2022-10-23 thomas sizeof(gotd->user_name)) {
214 3efd8e31 2022-10-23 thomas yyerror("%s: user name too long", __func__);
215 3efd8e31 2022-10-23 thomas free($2);
218 3efd8e31 2022-10-23 thomas free($2);
220 0781db0e 2023-01-06 thomas | connection
223 0781db0e 2023-01-06 thomas connection : CONNECTION '{' optnl conflags_l '}'
224 0781db0e 2023-01-06 thomas | CONNECTION conflags
226 0781db0e 2023-01-06 thomas conflags_l : conflags optnl conflags_l
227 0781db0e 2023-01-06 thomas | conflags optnl
230 0781db0e 2023-01-06 thomas conflags : REQUEST TIMEOUT timeout {
231 912db690 2023-01-06 thomas if ($3.tv_sec <= 0) {
232 912db690 2023-01-06 thomas yyerror("invalid timeout: %lld", $3.tv_sec);
235 0781db0e 2023-01-06 thomas memcpy(&gotd->request_timeout, &$3,
236 0781db0e 2023-01-06 thomas sizeof(gotd->request_timeout));
238 0781db0e 2023-01-06 thomas | LIMIT USER STRING NUMBER {
239 0781db0e 2023-01-06 thomas if (gotd_proc_id == PROC_LISTEN &&
240 0781db0e 2023-01-06 thomas conf_limit_user_connections($3, $4) == -1) {
241 0781db0e 2023-01-06 thomas free($3);
244 0781db0e 2023-01-06 thomas free($3);
248 3efd8e31 2022-10-23 thomas repository : REPOSITORY STRING {
249 3efd8e31 2022-10-23 thomas struct gotd_repo *repo;
251 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(repo, &gotd->repos, entry) {
252 3efd8e31 2022-10-23 thomas if (strcmp(repo->name, $2) == 0) {
253 3efd8e31 2022-10-23 thomas yyerror("duplicate repository '%s'", $2);
254 3efd8e31 2022-10-23 thomas free($2);
259 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_GOTD ||
260 c669c489 2022-12-30 thomas gotd_proc_id == PROC_AUTH) {
261 3efd8e31 2022-10-23 thomas new_repo = conf_new_repo($2);
263 3efd8e31 2022-10-23 thomas free($2);
264 3efd8e31 2022-10-23 thomas } '{' optnl repoopts2 '}' {
268 3efd8e31 2022-10-23 thomas repoopts1 : PATH STRING {
269 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_GOTD ||
270 c669c489 2022-12-30 thomas gotd_proc_id == PROC_AUTH) {
271 3efd8e31 2022-10-23 thomas if (!got_path_is_absolute($2)) {
272 3efd8e31 2022-10-23 thomas yyerror("%s: path %s is not absolute",
273 3efd8e31 2022-10-23 thomas __func__, $2);
274 3efd8e31 2022-10-23 thomas free($2);
277 fe6a8988 2023-01-08 thomas if (realpath($2, new_repo->path) == NULL) {
278 fe6a8988 2023-01-08 thomas yyerror("realpath %s: %s", $2, strerror(errno));
279 3efd8e31 2022-10-23 thomas free($2);
283 3efd8e31 2022-10-23 thomas free($2);
285 729a7e24 2022-11-17 thomas | PERMIT RO STRING {
286 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_AUTH) {
287 729a7e24 2022-11-17 thomas conf_new_access_rule(new_repo,
288 729a7e24 2022-11-17 thomas GOTD_ACCESS_PERMITTED, GOTD_AUTH_READ, $3);
291 729a7e24 2022-11-17 thomas | PERMIT RW STRING {
292 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_AUTH) {
293 729a7e24 2022-11-17 thomas conf_new_access_rule(new_repo,
294 729a7e24 2022-11-17 thomas GOTD_ACCESS_PERMITTED,
295 729a7e24 2022-11-17 thomas GOTD_AUTH_READ | GOTD_AUTH_WRITE, $3);
298 729a7e24 2022-11-17 thomas | DENY 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_DENIED, 0, $2);
306 3efd8e31 2022-10-23 thomas repoopts2 : repoopts2 repoopts1 nl
307 3efd8e31 2022-10-23 thomas | repoopts1 optnl
310 3efd8e31 2022-10-23 thomas nl : '\n' optnl
313 3efd8e31 2022-10-23 thomas optnl : '\n' optnl /* zero or more newlines */
314 3efd8e31 2022-10-23 thomas | /* empty */
319 3efd8e31 2022-10-23 thomas struct keywords {
320 3efd8e31 2022-10-23 thomas const char *k_name;
321 3efd8e31 2022-10-23 thomas int k_val;
325 3efd8e31 2022-10-23 thomas yyerror(const char *fmt, ...)
327 3efd8e31 2022-10-23 thomas va_list ap;
328 3efd8e31 2022-10-23 thomas char *msg;
330 3efd8e31 2022-10-23 thomas file->errors++;
331 3efd8e31 2022-10-23 thomas va_start(ap, fmt);
332 3efd8e31 2022-10-23 thomas if (vasprintf(&msg, fmt, ap) == -1)
333 3efd8e31 2022-10-23 thomas fatalx("yyerror vasprintf");
334 3efd8e31 2022-10-23 thomas va_end(ap);
335 3efd8e31 2022-10-23 thomas logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
336 3efd8e31 2022-10-23 thomas free(msg);
337 3efd8e31 2022-10-23 thomas return (0);
341 3efd8e31 2022-10-23 thomas kw_cmp(const void *k, const void *e)
343 3efd8e31 2022-10-23 thomas return (strcmp(k, ((const struct keywords *)e)->k_name));
347 3efd8e31 2022-10-23 thomas lookup(char *s)
349 3efd8e31 2022-10-23 thomas /* This has to be sorted always. */
350 3efd8e31 2022-10-23 thomas static const struct keywords keywords[] = {
351 0781db0e 2023-01-06 thomas { "connection", CONNECTION },
352 729a7e24 2022-11-17 thomas { "deny", DENY },
353 0781db0e 2023-01-06 thomas { "limit", LIMIT },
354 f9a4feb6 2023-01-06 thomas { "listen", LISTEN },
355 3efd8e31 2022-10-23 thomas { "on", ON },
356 3efd8e31 2022-10-23 thomas { "path", PATH },
357 729a7e24 2022-11-17 thomas { "permit", PERMIT },
358 3efd8e31 2022-10-23 thomas { "repository", REPOSITORY },
359 0781db0e 2023-01-06 thomas { "request", REQUEST },
360 729a7e24 2022-11-17 thomas { "ro", RO },
361 729a7e24 2022-11-17 thomas { "rw", RW },
362 0781db0e 2023-01-06 thomas { "timeout", TIMEOUT },
363 3efd8e31 2022-10-23 thomas { "user", USER },
365 3efd8e31 2022-10-23 thomas const struct keywords *p;
367 3efd8e31 2022-10-23 thomas p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
368 3efd8e31 2022-10-23 thomas sizeof(keywords[0]), kw_cmp);
371 3efd8e31 2022-10-23 thomas return (p->k_val);
373 3efd8e31 2022-10-23 thomas return (STRING);
376 3efd8e31 2022-10-23 thomas #define MAXPUSHBACK 128
378 3efd8e31 2022-10-23 thomas unsigned char *parsebuf;
379 3efd8e31 2022-10-23 thomas int parseindex;
380 3efd8e31 2022-10-23 thomas unsigned char pushback_buffer[MAXPUSHBACK];
381 3efd8e31 2022-10-23 thomas int pushback_index = 0;
384 3efd8e31 2022-10-23 thomas lgetc(int quotec)
386 3efd8e31 2022-10-23 thomas int c, next;
388 3efd8e31 2022-10-23 thomas if (parsebuf) {
389 3efd8e31 2022-10-23 thomas /* Read character from the parsebuffer instead of input. */
390 3efd8e31 2022-10-23 thomas if (parseindex >= 0) {
391 3efd8e31 2022-10-23 thomas c = parsebuf[parseindex++];
392 3efd8e31 2022-10-23 thomas if (c != '\0')
393 3efd8e31 2022-10-23 thomas return (c);
394 3efd8e31 2022-10-23 thomas parsebuf = NULL;
396 3efd8e31 2022-10-23 thomas parseindex++;
399 3efd8e31 2022-10-23 thomas if (pushback_index)
400 3efd8e31 2022-10-23 thomas return (pushback_buffer[--pushback_index]);
402 3efd8e31 2022-10-23 thomas if (quotec) {
403 3efd8e31 2022-10-23 thomas c = getc(file->stream);
404 3efd8e31 2022-10-23 thomas if (c == EOF)
405 3efd8e31 2022-10-23 thomas yyerror("reached end of file while parsing "
406 3efd8e31 2022-10-23 thomas "quoted string");
407 3efd8e31 2022-10-23 thomas return (c);
410 3efd8e31 2022-10-23 thomas c = getc(file->stream);
411 3efd8e31 2022-10-23 thomas while (c == '\\') {
412 3efd8e31 2022-10-23 thomas next = getc(file->stream);
413 3efd8e31 2022-10-23 thomas if (next != '\n') {
414 3efd8e31 2022-10-23 thomas c = next;
417 3efd8e31 2022-10-23 thomas yylval.lineno = file->lineno;
418 3efd8e31 2022-10-23 thomas file->lineno++;
419 3efd8e31 2022-10-23 thomas c = getc(file->stream);
422 3efd8e31 2022-10-23 thomas return (c);
426 3efd8e31 2022-10-23 thomas lungetc(int c)
428 3efd8e31 2022-10-23 thomas if (c == EOF)
429 3efd8e31 2022-10-23 thomas return (EOF);
430 3efd8e31 2022-10-23 thomas if (parsebuf) {
431 3efd8e31 2022-10-23 thomas parseindex--;
432 3efd8e31 2022-10-23 thomas if (parseindex >= 0)
433 3efd8e31 2022-10-23 thomas return (c);
435 3efd8e31 2022-10-23 thomas if (pushback_index < MAXPUSHBACK-1)
436 3efd8e31 2022-10-23 thomas return (pushback_buffer[pushback_index++] = c);
438 3efd8e31 2022-10-23 thomas return (EOF);
442 3efd8e31 2022-10-23 thomas findeol(void)
446 3efd8e31 2022-10-23 thomas parsebuf = NULL;
448 3efd8e31 2022-10-23 thomas /* Skip to either EOF or the first real EOL. */
449 3efd8e31 2022-10-23 thomas while (1) {
450 3efd8e31 2022-10-23 thomas if (pushback_index)
451 3efd8e31 2022-10-23 thomas c = pushback_buffer[--pushback_index];
453 3efd8e31 2022-10-23 thomas c = lgetc(0);
454 3efd8e31 2022-10-23 thomas if (c == '\n') {
455 3efd8e31 2022-10-23 thomas file->lineno++;
458 3efd8e31 2022-10-23 thomas if (c == EOF)
461 3efd8e31 2022-10-23 thomas return (ERROR);
465 3efd8e31 2022-10-23 thomas yylex(void)
467 3efd8e31 2022-10-23 thomas unsigned char buf[8096];
468 3efd8e31 2022-10-23 thomas unsigned char *p, *val;
469 3efd8e31 2022-10-23 thomas int quotec, next, c;
470 3efd8e31 2022-10-23 thomas int token;
474 3efd8e31 2022-10-23 thomas c = lgetc(0);
475 3efd8e31 2022-10-23 thomas while (c == ' ' || c == '\t')
476 3efd8e31 2022-10-23 thomas c = lgetc(0); /* nothing */
478 3efd8e31 2022-10-23 thomas yylval.lineno = file->lineno;
479 3efd8e31 2022-10-23 thomas if (c == '#') {
480 3efd8e31 2022-10-23 thomas c = lgetc(0);
481 3efd8e31 2022-10-23 thomas while (c != '\n' && c != EOF)
482 3efd8e31 2022-10-23 thomas c = lgetc(0); /* nothing */
484 3efd8e31 2022-10-23 thomas if (c == '$' && parsebuf == NULL) {
485 3efd8e31 2022-10-23 thomas while (1) {
486 3efd8e31 2022-10-23 thomas c = lgetc(0);
487 3efd8e31 2022-10-23 thomas if (c == EOF)
488 3efd8e31 2022-10-23 thomas return (0);
490 3efd8e31 2022-10-23 thomas if (p + 1 >= buf + sizeof(buf) - 1) {
491 3efd8e31 2022-10-23 thomas yyerror("string too long");
492 3efd8e31 2022-10-23 thomas return (findeol());
494 3efd8e31 2022-10-23 thomas if (isalnum(c) || c == '_') {
495 3efd8e31 2022-10-23 thomas *p++ = c;
496 3efd8e31 2022-10-23 thomas continue;
498 3efd8e31 2022-10-23 thomas *p = '\0';
499 3efd8e31 2022-10-23 thomas lungetc(c);
502 3efd8e31 2022-10-23 thomas val = symget(buf);
503 3efd8e31 2022-10-23 thomas if (val == NULL) {
504 3efd8e31 2022-10-23 thomas yyerror("macro '%s' not defined", buf);
505 3efd8e31 2022-10-23 thomas return (findeol());
507 3efd8e31 2022-10-23 thomas parsebuf = val;
508 3efd8e31 2022-10-23 thomas parseindex = 0;
509 3efd8e31 2022-10-23 thomas goto top;
512 3efd8e31 2022-10-23 thomas switch (c) {
513 3efd8e31 2022-10-23 thomas case '\'':
514 3efd8e31 2022-10-23 thomas case '"':
515 3efd8e31 2022-10-23 thomas quotec = c;
516 3efd8e31 2022-10-23 thomas while (1) {
517 3efd8e31 2022-10-23 thomas c = lgetc(quotec);
518 3efd8e31 2022-10-23 thomas if (c == EOF)
519 3efd8e31 2022-10-23 thomas return (0);
520 3efd8e31 2022-10-23 thomas if (c == '\n') {
521 3efd8e31 2022-10-23 thomas file->lineno++;
522 3efd8e31 2022-10-23 thomas continue;
523 3efd8e31 2022-10-23 thomas } else if (c == '\\') {
524 3efd8e31 2022-10-23 thomas next = lgetc(quotec);
525 3efd8e31 2022-10-23 thomas if (next == EOF)
526 3efd8e31 2022-10-23 thomas return (0);
527 3efd8e31 2022-10-23 thomas if (next == quotec || c == ' ' || c == '\t')
528 3efd8e31 2022-10-23 thomas c = next;
529 3efd8e31 2022-10-23 thomas else if (next == '\n') {
530 3efd8e31 2022-10-23 thomas file->lineno++;
531 3efd8e31 2022-10-23 thomas continue;
533 3efd8e31 2022-10-23 thomas lungetc(next);
534 3efd8e31 2022-10-23 thomas } else if (c == quotec) {
535 3efd8e31 2022-10-23 thomas *p = '\0';
537 3efd8e31 2022-10-23 thomas } else if (c == '\0') {
538 3efd8e31 2022-10-23 thomas yyerror("syntax error");
539 3efd8e31 2022-10-23 thomas return (findeol());
541 3efd8e31 2022-10-23 thomas if (p + 1 >= buf + sizeof(buf) - 1) {
542 3efd8e31 2022-10-23 thomas yyerror("string too long");
543 3efd8e31 2022-10-23 thomas return (findeol());
545 3efd8e31 2022-10-23 thomas *p++ = c;
547 3efd8e31 2022-10-23 thomas yylval.v.string = strdup(buf);
548 3efd8e31 2022-10-23 thomas if (yylval.v.string == NULL)
549 3efd8e31 2022-10-23 thomas err(1, "yylex: strdup");
550 3efd8e31 2022-10-23 thomas return (STRING);
553 3efd8e31 2022-10-23 thomas #define allowed_to_end_number(x) \
554 3efd8e31 2022-10-23 thomas (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
556 3efd8e31 2022-10-23 thomas if (c == '-' || isdigit(c)) {
558 3efd8e31 2022-10-23 thomas *p++ = c;
559 3efd8e31 2022-10-23 thomas if ((unsigned)(p-buf) >= sizeof(buf)) {
560 3efd8e31 2022-10-23 thomas yyerror("string too long");
561 3efd8e31 2022-10-23 thomas return (findeol());
563 3efd8e31 2022-10-23 thomas c = lgetc(0);
564 3efd8e31 2022-10-23 thomas } while (c != EOF && isdigit(c));
565 3efd8e31 2022-10-23 thomas lungetc(c);
566 3efd8e31 2022-10-23 thomas if (p == buf + 1 && buf[0] == '-')
567 3efd8e31 2022-10-23 thomas goto nodigits;
568 3efd8e31 2022-10-23 thomas if (c == EOF || allowed_to_end_number(c)) {
569 3efd8e31 2022-10-23 thomas const char *errstr = NULL;
571 3efd8e31 2022-10-23 thomas *p = '\0';
572 3efd8e31 2022-10-23 thomas yylval.v.number = strtonum(buf, LLONG_MIN,
573 3efd8e31 2022-10-23 thomas LLONG_MAX, &errstr);
574 3efd8e31 2022-10-23 thomas if (errstr) {
575 3efd8e31 2022-10-23 thomas yyerror("\"%s\" invalid number: %s",
576 3efd8e31 2022-10-23 thomas buf, errstr);
577 3efd8e31 2022-10-23 thomas return (findeol());
579 3efd8e31 2022-10-23 thomas return (NUMBER);
581 3efd8e31 2022-10-23 thomas nodigits:
582 3efd8e31 2022-10-23 thomas while (p > buf + 1)
583 3efd8e31 2022-10-23 thomas lungetc(*--p);
584 3efd8e31 2022-10-23 thomas c = *--p;
585 3efd8e31 2022-10-23 thomas if (c == '-')
586 3efd8e31 2022-10-23 thomas return (c);
590 3efd8e31 2022-10-23 thomas #define allowed_in_string(x) \
591 3efd8e31 2022-10-23 thomas (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
592 3efd8e31 2022-10-23 thomas x != '{' && x != '}' && \
593 3efd8e31 2022-10-23 thomas x != '!' && x != '=' && x != '#' && \
594 3efd8e31 2022-10-23 thomas x != ','))
596 3efd8e31 2022-10-23 thomas if (isalnum(c) || c == ':' || c == '_') {
598 3efd8e31 2022-10-23 thomas *p++ = c;
599 3efd8e31 2022-10-23 thomas if ((unsigned)(p-buf) >= sizeof(buf)) {
600 3efd8e31 2022-10-23 thomas yyerror("string too long");
601 3efd8e31 2022-10-23 thomas return (findeol());
603 3efd8e31 2022-10-23 thomas c = lgetc(0);
604 3efd8e31 2022-10-23 thomas } while (c != EOF && (allowed_in_string(c)));
605 3efd8e31 2022-10-23 thomas lungetc(c);
606 3efd8e31 2022-10-23 thomas *p = '\0';
607 3efd8e31 2022-10-23 thomas token = lookup(buf);
608 3efd8e31 2022-10-23 thomas if (token == STRING) {
609 3efd8e31 2022-10-23 thomas yylval.v.string = strdup(buf);
610 3efd8e31 2022-10-23 thomas if (yylval.v.string == NULL)
611 3efd8e31 2022-10-23 thomas err(1, "yylex: strdup");
613 3efd8e31 2022-10-23 thomas return (token);
615 3efd8e31 2022-10-23 thomas if (c == '\n') {
616 3efd8e31 2022-10-23 thomas yylval.lineno = file->lineno;
617 3efd8e31 2022-10-23 thomas file->lineno++;
619 3efd8e31 2022-10-23 thomas if (c == EOF)
620 3efd8e31 2022-10-23 thomas return (0);
621 3efd8e31 2022-10-23 thomas return (c);
625 3efd8e31 2022-10-23 thomas check_file_secrecy(int fd, const char *fname)
627 3efd8e31 2022-10-23 thomas struct stat st;
629 3efd8e31 2022-10-23 thomas if (fstat(fd, &st)) {
630 3efd8e31 2022-10-23 thomas log_warn("cannot stat %s", fname);
631 3efd8e31 2022-10-23 thomas return (-1);
633 3efd8e31 2022-10-23 thomas if (st.st_uid != 0 && st.st_uid != getuid()) {
634 3efd8e31 2022-10-23 thomas log_warnx("%s: owner not root or current user", fname);
635 3efd8e31 2022-10-23 thomas return (-1);
637 3efd8e31 2022-10-23 thomas if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
638 3efd8e31 2022-10-23 thomas log_warnx("%s: group writable or world read/writable", fname);
639 3efd8e31 2022-10-23 thomas return (-1);
641 3efd8e31 2022-10-23 thomas return (0);
644 3efd8e31 2022-10-23 thomas struct file *
645 3efd8e31 2022-10-23 thomas newfile(const char *name, int secret)
647 3efd8e31 2022-10-23 thomas struct file *nfile;
649 3efd8e31 2022-10-23 thomas nfile = calloc(1, sizeof(struct file));
650 3efd8e31 2022-10-23 thomas if (nfile == NULL) {
651 3efd8e31 2022-10-23 thomas log_warn("calloc");
652 3efd8e31 2022-10-23 thomas return (NULL);
654 3efd8e31 2022-10-23 thomas nfile->name = strdup(name);
655 3efd8e31 2022-10-23 thomas if (nfile->name == NULL) {
656 3efd8e31 2022-10-23 thomas log_warn("strdup");
657 3efd8e31 2022-10-23 thomas free(nfile);
658 3efd8e31 2022-10-23 thomas return (NULL);
660 3efd8e31 2022-10-23 thomas nfile->stream = fopen(nfile->name, "r");
661 3efd8e31 2022-10-23 thomas if (nfile->stream == NULL) {
662 3efd8e31 2022-10-23 thomas /* no warning, we don't require a conf file */
663 3efd8e31 2022-10-23 thomas free(nfile->name);
664 3efd8e31 2022-10-23 thomas free(nfile);
665 3efd8e31 2022-10-23 thomas return (NULL);
666 3efd8e31 2022-10-23 thomas } else if (secret &&
667 3efd8e31 2022-10-23 thomas check_file_secrecy(fileno(nfile->stream), nfile->name)) {
668 3efd8e31 2022-10-23 thomas fclose(nfile->stream);
669 3efd8e31 2022-10-23 thomas free(nfile->name);
670 3efd8e31 2022-10-23 thomas free(nfile);
671 3efd8e31 2022-10-23 thomas return (NULL);
673 3efd8e31 2022-10-23 thomas nfile->lineno = 1;
674 3efd8e31 2022-10-23 thomas return (nfile);
677 3efd8e31 2022-10-23 thomas static void
678 3efd8e31 2022-10-23 thomas closefile(struct file *xfile)
680 3efd8e31 2022-10-23 thomas fclose(xfile->stream);
681 3efd8e31 2022-10-23 thomas free(xfile->name);
682 3efd8e31 2022-10-23 thomas free(xfile);
686 3efd8e31 2022-10-23 thomas parse_config(const char *filename, enum gotd_procid proc_id,
687 3efd8e31 2022-10-23 thomas struct gotd *env)
689 3efd8e31 2022-10-23 thomas struct sym *sym, *next;
690 88f1bb6d 2023-01-02 thomas struct gotd_repo *repo;
692 3efd8e31 2022-10-23 thomas memset(env, 0, sizeof(*env));
694 3efd8e31 2022-10-23 thomas gotd = env;
695 3efd8e31 2022-10-23 thomas gotd_proc_id = proc_id;
696 3efd8e31 2022-10-23 thomas TAILQ_INIT(&gotd->repos);
698 3efd8e31 2022-10-23 thomas /* Apply default values. */
699 3efd8e31 2022-10-23 thomas if (strlcpy(gotd->unix_socket_path, GOTD_UNIX_SOCKET,
700 3efd8e31 2022-10-23 thomas sizeof(gotd->unix_socket_path)) >= sizeof(gotd->unix_socket_path)) {
701 3efd8e31 2022-10-23 thomas fprintf(stderr, "%s: unix socket path too long", __func__);
702 3efd8e31 2022-10-23 thomas return -1;
704 3efd8e31 2022-10-23 thomas if (strlcpy(gotd->user_name, GOTD_USER,
705 3efd8e31 2022-10-23 thomas sizeof(gotd->user_name)) >= sizeof(gotd->user_name)) {
706 3efd8e31 2022-10-23 thomas fprintf(stderr, "%s: user name too long", __func__);
707 3efd8e31 2022-10-23 thomas return -1;
710 0781db0e 2023-01-06 thomas gotd->request_timeout.tv_sec = GOTD_DEFAULT_REQUEST_TIMEOUT;
711 0781db0e 2023-01-06 thomas gotd->request_timeout.tv_usec = 0;
713 3efd8e31 2022-10-23 thomas file = newfile(filename, 0);
714 3efd8e31 2022-10-23 thomas if (file == NULL) {
715 3efd8e31 2022-10-23 thomas /* just return, as we don't require a conf file */
716 3efd8e31 2022-10-23 thomas return (0);
719 3efd8e31 2022-10-23 thomas yyparse();
720 3efd8e31 2022-10-23 thomas errors = file->errors;
721 3efd8e31 2022-10-23 thomas closefile(file);
723 3efd8e31 2022-10-23 thomas /* Free macros and check which have not been used. */
724 3efd8e31 2022-10-23 thomas TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
725 3efd8e31 2022-10-23 thomas if ((gotd->verbosity > 1) && !sym->used)
726 3efd8e31 2022-10-23 thomas fprintf(stderr, "warning: macro '%s' not used\n",
727 3efd8e31 2022-10-23 thomas sym->nam);
728 3efd8e31 2022-10-23 thomas if (!sym->persist) {
729 3efd8e31 2022-10-23 thomas free(sym->nam);
730 3efd8e31 2022-10-23 thomas free(sym->val);
731 3efd8e31 2022-10-23 thomas TAILQ_REMOVE(&symhead, sym, entry);
732 3efd8e31 2022-10-23 thomas free(sym);
736 3efd8e31 2022-10-23 thomas if (errors)
737 3efd8e31 2022-10-23 thomas return (-1);
739 88f1bb6d 2023-01-02 thomas TAILQ_FOREACH(repo, &gotd->repos, entry) {
740 88f1bb6d 2023-01-02 thomas if (repo->path[0] == '\0') {
741 0cbf8de7 2023-01-02 thomas log_warnx("repository \"%s\": no path provided in "
742 0cbf8de7 2023-01-02 thomas "configuration file", repo->name);
743 88f1bb6d 2023-01-02 thomas return (-1);
747 3efd8e31 2022-10-23 thomas return (0);
750 0781db0e 2023-01-06 thomas static int
751 0781db0e 2023-01-06 thomas uid_connection_limit_cmp(const void *pa, const void *pb)
753 0781db0e 2023-01-06 thomas const struct gotd_uid_connection_limit *a = pa, *b = pb;
755 0781db0e 2023-01-06 thomas if (a->uid < b->uid)
756 0781db0e 2023-01-06 thomas return -1;
757 0781db0e 2023-01-06 thomas else if (a->uid > b->uid);
758 0781db0e 2023-01-06 thomas return 1;
760 0781db0e 2023-01-06 thomas return 0;
763 0781db0e 2023-01-06 thomas static int
764 0781db0e 2023-01-06 thomas conf_limit_user_connections(const char *user, int maximum)
766 0781db0e 2023-01-06 thomas uid_t uid;
767 0781db0e 2023-01-06 thomas struct gotd_uid_connection_limit *limit;
768 0781db0e 2023-01-06 thomas size_t nlimits;
770 0781db0e 2023-01-06 thomas if (maximum < 1) {
771 0781db0e 2023-01-06 thomas yyerror("max connections cannot be smaller 1");
772 0781db0e 2023-01-06 thomas return -1;
774 0781db0e 2023-01-06 thomas if (maximum > GOTD_MAXCLIENTS) {
775 0781db0e 2023-01-06 thomas yyerror("max connections must be <= %d", GOTD_MAXCLIENTS);
776 0781db0e 2023-01-06 thomas return -1;
779 0781db0e 2023-01-06 thomas if (gotd_auth_parseuid(user, &uid) == -1) {
780 0781db0e 2023-01-06 thomas yyerror("%s: no such user", user);
781 0781db0e 2023-01-06 thomas return -1;
784 0781db0e 2023-01-06 thomas limit = gotd_find_uid_connection_limit(gotd->connection_limits,
785 0781db0e 2023-01-06 thomas gotd->nconnection_limits, uid);
786 0781db0e 2023-01-06 thomas if (limit) {
787 0781db0e 2023-01-06 thomas limit->max_connections = maximum;
788 0781db0e 2023-01-06 thomas return 0;
791 0781db0e 2023-01-06 thomas limit = gotd->connection_limits;
792 0781db0e 2023-01-06 thomas nlimits = gotd->nconnection_limits + 1;
793 0781db0e 2023-01-06 thomas limit = reallocarray(limit, nlimits, sizeof(*limit));
794 0781db0e 2023-01-06 thomas if (limit == NULL)
795 0781db0e 2023-01-06 thomas fatal("reallocarray");
797 0781db0e 2023-01-06 thomas limit[nlimits - 1].uid = uid;
798 0781db0e 2023-01-06 thomas limit[nlimits - 1].max_connections = maximum;
800 0781db0e 2023-01-06 thomas gotd->connection_limits = limit;
801 0781db0e 2023-01-06 thomas gotd->nconnection_limits = nlimits;
802 0781db0e 2023-01-06 thomas qsort(gotd->connection_limits, gotd->nconnection_limits,
803 0781db0e 2023-01-06 thomas sizeof(gotd->connection_limits[0]), uid_connection_limit_cmp);
805 0781db0e 2023-01-06 thomas return 0;
808 3efd8e31 2022-10-23 thomas static struct gotd_repo *
809 3efd8e31 2022-10-23 thomas conf_new_repo(const char *name)
811 3efd8e31 2022-10-23 thomas struct gotd_repo *repo;
813 a42b418b 2023-01-02 thomas if (name[0] == '\0') {
814 a42b418b 2023-01-02 thomas fatalx("syntax error: empty repository name found in %s",
815 a42b418b 2023-01-02 thomas file->name);
818 0cbf8de7 2023-01-02 thomas if (strchr(name, '\n') != NULL)
819 0cbf8de7 2023-01-02 thomas fatalx("repository names must not contain linefeeds: %s", name);
821 3efd8e31 2022-10-23 thomas repo = calloc(1, sizeof(*repo));
822 3efd8e31 2022-10-23 thomas if (repo == NULL)
823 3efd8e31 2022-10-23 thomas fatalx("%s: calloc", __func__);
825 729a7e24 2022-11-17 thomas STAILQ_INIT(&repo->rules);
827 3efd8e31 2022-10-23 thomas if (strlcpy(repo->name, name, sizeof(repo->name)) >=
828 3efd8e31 2022-10-23 thomas sizeof(repo->name))
829 3efd8e31 2022-10-23 thomas fatalx("%s: strlcpy", __func__);
831 3efd8e31 2022-10-23 thomas TAILQ_INSERT_TAIL(&gotd->repos, repo, entry);
832 3efd8e31 2022-10-23 thomas gotd->nrepos++;
834 3efd8e31 2022-10-23 thomas return repo;
837 729a7e24 2022-11-17 thomas static void
838 729a7e24 2022-11-17 thomas conf_new_access_rule(struct gotd_repo *repo, enum gotd_access access,
839 729a7e24 2022-11-17 thomas int authorization, char *identifier)
841 729a7e24 2022-11-17 thomas struct gotd_access_rule *rule;
843 729a7e24 2022-11-17 thomas rule = calloc(1, sizeof(*rule));
844 729a7e24 2022-11-17 thomas if (rule == NULL)
845 729a7e24 2022-11-17 thomas fatal("calloc");
847 729a7e24 2022-11-17 thomas rule->access = access;
848 729a7e24 2022-11-17 thomas rule->authorization = authorization;
849 729a7e24 2022-11-17 thomas rule->identifier = identifier;
851 729a7e24 2022-11-17 thomas STAILQ_INSERT_TAIL(&repo->rules, rule, entry);
855 3efd8e31 2022-10-23 thomas symset(const char *nam, const char *val, int persist)
857 3efd8e31 2022-10-23 thomas struct sym *sym;
859 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(sym, &symhead, entry) {
860 3efd8e31 2022-10-23 thomas if (strcmp(nam, sym->nam) == 0)
864 3efd8e31 2022-10-23 thomas if (sym != NULL) {
865 3efd8e31 2022-10-23 thomas if (sym->persist == 1)
866 3efd8e31 2022-10-23 thomas return (0);
868 3efd8e31 2022-10-23 thomas free(sym->nam);
869 3efd8e31 2022-10-23 thomas free(sym->val);
870 3efd8e31 2022-10-23 thomas TAILQ_REMOVE(&symhead, sym, entry);
871 3efd8e31 2022-10-23 thomas free(sym);
874 3efd8e31 2022-10-23 thomas sym = calloc(1, sizeof(*sym));
875 3efd8e31 2022-10-23 thomas if (sym == NULL)
876 3efd8e31 2022-10-23 thomas return (-1);
878 3efd8e31 2022-10-23 thomas sym->nam = strdup(nam);
879 3efd8e31 2022-10-23 thomas if (sym->nam == NULL) {
880 3efd8e31 2022-10-23 thomas free(sym);
881 3efd8e31 2022-10-23 thomas return (-1);
883 3efd8e31 2022-10-23 thomas sym->val = strdup(val);
884 3efd8e31 2022-10-23 thomas if (sym->val == NULL) {
885 3efd8e31 2022-10-23 thomas free(sym->nam);
886 3efd8e31 2022-10-23 thomas free(sym);
887 3efd8e31 2022-10-23 thomas return (-1);
889 3efd8e31 2022-10-23 thomas sym->used = 0;
890 3efd8e31 2022-10-23 thomas sym->persist = persist;
891 3efd8e31 2022-10-23 thomas TAILQ_INSERT_TAIL(&symhead, sym, entry);
892 3efd8e31 2022-10-23 thomas return (0);
896 3efd8e31 2022-10-23 thomas symget(const char *nam)
898 3efd8e31 2022-10-23 thomas struct sym *sym;
900 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(sym, &symhead, entry) {
901 3efd8e31 2022-10-23 thomas if (strcmp(nam, sym->nam) == 0) {
902 3efd8e31 2022-10-23 thomas sym->used = 1;
903 3efd8e31 2022-10-23 thomas return (sym->val);
906 3efd8e31 2022-10-23 thomas return (NULL);
