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 0781db0e 2023-01-06 thomas %type <v.tv> timeout
116 3efd8e31 2022-10-23 thomas grammar :
117 3efd8e31 2022-10-23 thomas | grammar '\n'
118 3efd8e31 2022-10-23 thomas | grammar main '\n'
119 3efd8e31 2022-10-23 thomas | grammar repository '\n'
122 0781db0e 2023-01-06 thomas timeout : NUMBER {
123 0781db0e 2023-01-06 thomas if ($1 < 0) {
124 0781db0e 2023-01-06 thomas yyerror("invalid timeout: %lld", $1);
127 0781db0e 2023-01-06 thomas $$.tv_sec = $1;
128 0781db0e 2023-01-06 thomas $$.tv_usec = 0;
130 77d755e8 2023-01-06 thomas | STRING {
131 77d755e8 2023-01-06 thomas const char *errstr;
132 77d755e8 2023-01-06 thomas const char *type = "seconds";
133 77d755e8 2023-01-06 thomas size_t len;
134 77d755e8 2023-01-06 thomas int mul = 1;
136 77d755e8 2023-01-06 thomas if (*$1 == '\0') {
137 77d755e8 2023-01-06 thomas yyerror("invalid number of seconds: %s", $1);
138 77d755e8 2023-01-06 thomas free($1);
142 77d755e8 2023-01-06 thomas len = strlen($1);
143 77d755e8 2023-01-06 thomas switch ($1[len - 1]) {
144 77d755e8 2023-01-06 thomas case 'S':
145 77d755e8 2023-01-06 thomas case 's':
146 77d755e8 2023-01-06 thomas $1[len - 1] = '\0';
148 77d755e8 2023-01-06 thomas case 'M':
149 77d755e8 2023-01-06 thomas case 'm':
150 77d755e8 2023-01-06 thomas type = "minutes";
151 77d755e8 2023-01-06 thomas mul = 60;
152 77d755e8 2023-01-06 thomas $1[len - 1] = '\0';
154 77d755e8 2023-01-06 thomas case 'H':
155 77d755e8 2023-01-06 thomas case 'h':
156 77d755e8 2023-01-06 thomas type = "hours";
157 77d755e8 2023-01-06 thomas mul = 60 * 60;
158 77d755e8 2023-01-06 thomas $1[len - 1] = '\0';
162 77d755e8 2023-01-06 thomas $$.tv_usec = 0;
163 85bccbf7 2023-01-06 thomas $$.tv_sec = strtonum($1, 0, INT_MAX / mul, &errstr);
164 77d755e8 2023-01-06 thomas if (errstr) {
165 77d755e8 2023-01-06 thomas yyerror("number of %s is %s: %s", type,
166 77d755e8 2023-01-06 thomas errstr, $1);
167 77d755e8 2023-01-06 thomas free($1);
171 77d755e8 2023-01-06 thomas $$.tv_sec *= mul;
172 77d755e8 2023-01-06 thomas free($1);
176 f9a4feb6 2023-01-06 thomas main : LISTEN ON STRING {
177 7348ded8 2023-01-19 thomas if (!got_path_is_absolute($3))
178 7348ded8 2023-01-19 thomas yyerror("bad unix socket path \"%s\": "
179 7348ded8 2023-01-19 thomas "must be an absolute path", $3);
181 2b3d32a1 2022-12-30 thomas if (gotd_proc_id == PROC_LISTEN) {
182 f9a4feb6 2023-01-06 thomas if (strlcpy(gotd->unix_socket_path, $3,
183 3efd8e31 2022-10-23 thomas sizeof(gotd->unix_socket_path)) >=
184 3efd8e31 2022-10-23 thomas sizeof(gotd->unix_socket_path)) {
185 3efd8e31 2022-10-23 thomas yyerror("%s: unix socket path too long",
186 3efd8e31 2022-10-23 thomas __func__);
187 f9a4feb6 2023-01-06 thomas free($3);
191 f9a4feb6 2023-01-06 thomas free($3);
193 3efd8e31 2022-10-23 thomas | USER STRING {
194 3efd8e31 2022-10-23 thomas if (strlcpy(gotd->user_name, $2,
195 3efd8e31 2022-10-23 thomas sizeof(gotd->user_name)) >=
196 3efd8e31 2022-10-23 thomas sizeof(gotd->user_name)) {
197 3efd8e31 2022-10-23 thomas yyerror("%s: user name too long", __func__);
198 3efd8e31 2022-10-23 thomas free($2);
201 3efd8e31 2022-10-23 thomas free($2);
203 0781db0e 2023-01-06 thomas | connection
206 0781db0e 2023-01-06 thomas connection : CONNECTION '{' optnl conflags_l '}'
207 0781db0e 2023-01-06 thomas | CONNECTION conflags
209 0781db0e 2023-01-06 thomas conflags_l : conflags optnl conflags_l
210 0781db0e 2023-01-06 thomas | conflags optnl
213 0781db0e 2023-01-06 thomas conflags : REQUEST TIMEOUT timeout {
214 912db690 2023-01-06 thomas if ($3.tv_sec <= 0) {
215 912db690 2023-01-06 thomas yyerror("invalid timeout: %lld", $3.tv_sec);
218 0781db0e 2023-01-06 thomas memcpy(&gotd->request_timeout, &$3,
219 0781db0e 2023-01-06 thomas sizeof(gotd->request_timeout));
221 0781db0e 2023-01-06 thomas | LIMIT USER STRING NUMBER {
222 0781db0e 2023-01-06 thomas if (gotd_proc_id == PROC_LISTEN &&
223 0781db0e 2023-01-06 thomas conf_limit_user_connections($3, $4) == -1) {
224 0781db0e 2023-01-06 thomas free($3);
227 0781db0e 2023-01-06 thomas free($3);
231 3efd8e31 2022-10-23 thomas repository : REPOSITORY STRING {
232 3efd8e31 2022-10-23 thomas struct gotd_repo *repo;
234 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(repo, &gotd->repos, entry) {
235 3efd8e31 2022-10-23 thomas if (strcmp(repo->name, $2) == 0) {
236 3efd8e31 2022-10-23 thomas yyerror("duplicate repository '%s'", $2);
237 3efd8e31 2022-10-23 thomas free($2);
242 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_GOTD ||
243 c669c489 2022-12-30 thomas gotd_proc_id == PROC_AUTH) {
244 3efd8e31 2022-10-23 thomas new_repo = conf_new_repo($2);
246 3efd8e31 2022-10-23 thomas free($2);
247 3efd8e31 2022-10-23 thomas } '{' optnl repoopts2 '}' {
251 3efd8e31 2022-10-23 thomas repoopts1 : PATH STRING {
252 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_GOTD ||
253 c669c489 2022-12-30 thomas gotd_proc_id == PROC_AUTH) {
254 3efd8e31 2022-10-23 thomas if (!got_path_is_absolute($2)) {
255 3efd8e31 2022-10-23 thomas yyerror("%s: path %s is not absolute",
256 3efd8e31 2022-10-23 thomas __func__, $2);
257 3efd8e31 2022-10-23 thomas free($2);
260 fe6a8988 2023-01-08 thomas if (realpath($2, new_repo->path) == NULL) {
261 fe6a8988 2023-01-08 thomas yyerror("realpath %s: %s", $2, strerror(errno));
262 3efd8e31 2022-10-23 thomas free($2);
266 3efd8e31 2022-10-23 thomas free($2);
268 729a7e24 2022-11-17 thomas | PERMIT RO STRING {
269 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_AUTH) {
270 729a7e24 2022-11-17 thomas conf_new_access_rule(new_repo,
271 729a7e24 2022-11-17 thomas GOTD_ACCESS_PERMITTED, GOTD_AUTH_READ, $3);
274 729a7e24 2022-11-17 thomas | PERMIT RW STRING {
275 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_AUTH) {
276 729a7e24 2022-11-17 thomas conf_new_access_rule(new_repo,
277 729a7e24 2022-11-17 thomas GOTD_ACCESS_PERMITTED,
278 729a7e24 2022-11-17 thomas GOTD_AUTH_READ | GOTD_AUTH_WRITE, $3);
281 729a7e24 2022-11-17 thomas | DENY STRING {
282 c669c489 2022-12-30 thomas if (gotd_proc_id == PROC_AUTH) {
283 729a7e24 2022-11-17 thomas conf_new_access_rule(new_repo,
284 729a7e24 2022-11-17 thomas GOTD_ACCESS_DENIED, 0, $2);
289 3efd8e31 2022-10-23 thomas repoopts2 : repoopts2 repoopts1 nl
290 3efd8e31 2022-10-23 thomas | repoopts1 optnl
293 3efd8e31 2022-10-23 thomas nl : '\n' optnl
296 3efd8e31 2022-10-23 thomas optnl : '\n' optnl /* zero or more newlines */
297 3efd8e31 2022-10-23 thomas | /* empty */
302 3efd8e31 2022-10-23 thomas struct keywords {
303 3efd8e31 2022-10-23 thomas const char *k_name;
304 3efd8e31 2022-10-23 thomas int k_val;
308 3efd8e31 2022-10-23 thomas yyerror(const char *fmt, ...)
310 3efd8e31 2022-10-23 thomas va_list ap;
311 3efd8e31 2022-10-23 thomas char *msg;
313 3efd8e31 2022-10-23 thomas file->errors++;
314 3efd8e31 2022-10-23 thomas va_start(ap, fmt);
315 3efd8e31 2022-10-23 thomas if (vasprintf(&msg, fmt, ap) == -1)
316 3efd8e31 2022-10-23 thomas fatalx("yyerror vasprintf");
317 3efd8e31 2022-10-23 thomas va_end(ap);
318 3efd8e31 2022-10-23 thomas logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
319 3efd8e31 2022-10-23 thomas free(msg);
320 3efd8e31 2022-10-23 thomas return (0);
324 3efd8e31 2022-10-23 thomas kw_cmp(const void *k, const void *e)
326 3efd8e31 2022-10-23 thomas return (strcmp(k, ((const struct keywords *)e)->k_name));
330 3efd8e31 2022-10-23 thomas lookup(char *s)
332 3efd8e31 2022-10-23 thomas /* This has to be sorted always. */
333 3efd8e31 2022-10-23 thomas static const struct keywords keywords[] = {
334 0781db0e 2023-01-06 thomas { "connection", CONNECTION },
335 729a7e24 2022-11-17 thomas { "deny", DENY },
336 0781db0e 2023-01-06 thomas { "limit", LIMIT },
337 f9a4feb6 2023-01-06 thomas { "listen", LISTEN },
338 3efd8e31 2022-10-23 thomas { "on", ON },
339 3efd8e31 2022-10-23 thomas { "path", PATH },
340 729a7e24 2022-11-17 thomas { "permit", PERMIT },
341 3efd8e31 2022-10-23 thomas { "repository", REPOSITORY },
342 0781db0e 2023-01-06 thomas { "request", REQUEST },
343 729a7e24 2022-11-17 thomas { "ro", RO },
344 729a7e24 2022-11-17 thomas { "rw", RW },
345 0781db0e 2023-01-06 thomas { "timeout", TIMEOUT },
346 3efd8e31 2022-10-23 thomas { "user", USER },
348 3efd8e31 2022-10-23 thomas const struct keywords *p;
350 3efd8e31 2022-10-23 thomas p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
351 3efd8e31 2022-10-23 thomas sizeof(keywords[0]), kw_cmp);
354 3efd8e31 2022-10-23 thomas return (p->k_val);
356 3efd8e31 2022-10-23 thomas return (STRING);
359 3efd8e31 2022-10-23 thomas #define MAXPUSHBACK 128
361 3efd8e31 2022-10-23 thomas unsigned char *parsebuf;
362 3efd8e31 2022-10-23 thomas int parseindex;
363 3efd8e31 2022-10-23 thomas unsigned char pushback_buffer[MAXPUSHBACK];
364 3efd8e31 2022-10-23 thomas int pushback_index = 0;
367 3efd8e31 2022-10-23 thomas lgetc(int quotec)
369 3efd8e31 2022-10-23 thomas int c, next;
371 3efd8e31 2022-10-23 thomas if (parsebuf) {
372 3efd8e31 2022-10-23 thomas /* Read character from the parsebuffer instead of input. */
373 3efd8e31 2022-10-23 thomas if (parseindex >= 0) {
374 3efd8e31 2022-10-23 thomas c = parsebuf[parseindex++];
375 3efd8e31 2022-10-23 thomas if (c != '\0')
376 3efd8e31 2022-10-23 thomas return (c);
377 3efd8e31 2022-10-23 thomas parsebuf = NULL;
379 3efd8e31 2022-10-23 thomas parseindex++;
382 3efd8e31 2022-10-23 thomas if (pushback_index)
383 3efd8e31 2022-10-23 thomas return (pushback_buffer[--pushback_index]);
385 3efd8e31 2022-10-23 thomas if (quotec) {
386 3efd8e31 2022-10-23 thomas c = getc(file->stream);
387 3efd8e31 2022-10-23 thomas if (c == EOF)
388 3efd8e31 2022-10-23 thomas yyerror("reached end of file while parsing "
389 3efd8e31 2022-10-23 thomas "quoted string");
390 3efd8e31 2022-10-23 thomas return (c);
393 3efd8e31 2022-10-23 thomas c = getc(file->stream);
394 3efd8e31 2022-10-23 thomas while (c == '\\') {
395 3efd8e31 2022-10-23 thomas next = getc(file->stream);
396 3efd8e31 2022-10-23 thomas if (next != '\n') {
397 3efd8e31 2022-10-23 thomas c = next;
400 3efd8e31 2022-10-23 thomas yylval.lineno = file->lineno;
401 3efd8e31 2022-10-23 thomas file->lineno++;
402 3efd8e31 2022-10-23 thomas c = getc(file->stream);
405 3efd8e31 2022-10-23 thomas return (c);
409 3efd8e31 2022-10-23 thomas lungetc(int c)
411 3efd8e31 2022-10-23 thomas if (c == EOF)
412 3efd8e31 2022-10-23 thomas return (EOF);
413 3efd8e31 2022-10-23 thomas if (parsebuf) {
414 3efd8e31 2022-10-23 thomas parseindex--;
415 3efd8e31 2022-10-23 thomas if (parseindex >= 0)
416 3efd8e31 2022-10-23 thomas return (c);
418 3efd8e31 2022-10-23 thomas if (pushback_index < MAXPUSHBACK-1)
419 3efd8e31 2022-10-23 thomas return (pushback_buffer[pushback_index++] = c);
421 3efd8e31 2022-10-23 thomas return (EOF);
425 3efd8e31 2022-10-23 thomas findeol(void)
429 3efd8e31 2022-10-23 thomas parsebuf = NULL;
431 3efd8e31 2022-10-23 thomas /* Skip to either EOF or the first real EOL. */
432 3efd8e31 2022-10-23 thomas while (1) {
433 3efd8e31 2022-10-23 thomas if (pushback_index)
434 3efd8e31 2022-10-23 thomas c = pushback_buffer[--pushback_index];
436 3efd8e31 2022-10-23 thomas c = lgetc(0);
437 3efd8e31 2022-10-23 thomas if (c == '\n') {
438 3efd8e31 2022-10-23 thomas file->lineno++;
441 3efd8e31 2022-10-23 thomas if (c == EOF)
444 3efd8e31 2022-10-23 thomas return (ERROR);
448 3efd8e31 2022-10-23 thomas yylex(void)
450 3efd8e31 2022-10-23 thomas unsigned char buf[8096];
451 3efd8e31 2022-10-23 thomas unsigned char *p, *val;
452 3efd8e31 2022-10-23 thomas int quotec, next, c;
453 3efd8e31 2022-10-23 thomas int token;
457 3efd8e31 2022-10-23 thomas c = lgetc(0);
458 3efd8e31 2022-10-23 thomas while (c == ' ' || c == '\t')
459 3efd8e31 2022-10-23 thomas c = lgetc(0); /* nothing */
461 3efd8e31 2022-10-23 thomas yylval.lineno = file->lineno;
462 3efd8e31 2022-10-23 thomas if (c == '#') {
463 3efd8e31 2022-10-23 thomas c = lgetc(0);
464 3efd8e31 2022-10-23 thomas while (c != '\n' && c != EOF)
465 3efd8e31 2022-10-23 thomas c = lgetc(0); /* nothing */
467 3efd8e31 2022-10-23 thomas if (c == '$' && parsebuf == NULL) {
468 3efd8e31 2022-10-23 thomas while (1) {
469 3efd8e31 2022-10-23 thomas c = lgetc(0);
470 3efd8e31 2022-10-23 thomas if (c == EOF)
471 3efd8e31 2022-10-23 thomas return (0);
473 3efd8e31 2022-10-23 thomas if (p + 1 >= buf + sizeof(buf) - 1) {
474 3efd8e31 2022-10-23 thomas yyerror("string too long");
475 3efd8e31 2022-10-23 thomas return (findeol());
477 3efd8e31 2022-10-23 thomas if (isalnum(c) || c == '_') {
478 3efd8e31 2022-10-23 thomas *p++ = c;
479 3efd8e31 2022-10-23 thomas continue;
481 3efd8e31 2022-10-23 thomas *p = '\0';
482 3efd8e31 2022-10-23 thomas lungetc(c);
485 3efd8e31 2022-10-23 thomas val = symget(buf);
486 3efd8e31 2022-10-23 thomas if (val == NULL) {
487 3efd8e31 2022-10-23 thomas yyerror("macro '%s' not defined", buf);
488 3efd8e31 2022-10-23 thomas return (findeol());
490 3efd8e31 2022-10-23 thomas parsebuf = val;
491 3efd8e31 2022-10-23 thomas parseindex = 0;
492 3efd8e31 2022-10-23 thomas goto top;
495 3efd8e31 2022-10-23 thomas switch (c) {
496 3efd8e31 2022-10-23 thomas case '\'':
497 3efd8e31 2022-10-23 thomas case '"':
498 3efd8e31 2022-10-23 thomas quotec = c;
499 3efd8e31 2022-10-23 thomas while (1) {
500 3efd8e31 2022-10-23 thomas c = lgetc(quotec);
501 3efd8e31 2022-10-23 thomas if (c == EOF)
502 3efd8e31 2022-10-23 thomas return (0);
503 3efd8e31 2022-10-23 thomas if (c == '\n') {
504 3efd8e31 2022-10-23 thomas file->lineno++;
505 3efd8e31 2022-10-23 thomas continue;
506 3efd8e31 2022-10-23 thomas } else if (c == '\\') {
507 3efd8e31 2022-10-23 thomas next = lgetc(quotec);
508 3efd8e31 2022-10-23 thomas if (next == EOF)
509 3efd8e31 2022-10-23 thomas return (0);
510 3efd8e31 2022-10-23 thomas if (next == quotec || c == ' ' || c == '\t')
511 3efd8e31 2022-10-23 thomas c = next;
512 3efd8e31 2022-10-23 thomas else if (next == '\n') {
513 3efd8e31 2022-10-23 thomas file->lineno++;
514 3efd8e31 2022-10-23 thomas continue;
516 3efd8e31 2022-10-23 thomas lungetc(next);
517 3efd8e31 2022-10-23 thomas } else if (c == quotec) {
518 3efd8e31 2022-10-23 thomas *p = '\0';
520 3efd8e31 2022-10-23 thomas } else if (c == '\0') {
521 3efd8e31 2022-10-23 thomas yyerror("syntax error");
522 3efd8e31 2022-10-23 thomas return (findeol());
524 3efd8e31 2022-10-23 thomas if (p + 1 >= buf + sizeof(buf) - 1) {
525 3efd8e31 2022-10-23 thomas yyerror("string too long");
526 3efd8e31 2022-10-23 thomas return (findeol());
528 3efd8e31 2022-10-23 thomas *p++ = c;
530 3efd8e31 2022-10-23 thomas yylval.v.string = strdup(buf);
531 3efd8e31 2022-10-23 thomas if (yylval.v.string == NULL)
532 3efd8e31 2022-10-23 thomas err(1, "yylex: strdup");
533 3efd8e31 2022-10-23 thomas return (STRING);
536 3efd8e31 2022-10-23 thomas #define allowed_to_end_number(x) \
537 3efd8e31 2022-10-23 thomas (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
539 3efd8e31 2022-10-23 thomas if (c == '-' || isdigit(c)) {
541 3efd8e31 2022-10-23 thomas *p++ = c;
542 3efd8e31 2022-10-23 thomas if ((unsigned)(p-buf) >= sizeof(buf)) {
543 3efd8e31 2022-10-23 thomas yyerror("string too long");
544 3efd8e31 2022-10-23 thomas return (findeol());
546 3efd8e31 2022-10-23 thomas c = lgetc(0);
547 3efd8e31 2022-10-23 thomas } while (c != EOF && isdigit(c));
548 3efd8e31 2022-10-23 thomas lungetc(c);
549 3efd8e31 2022-10-23 thomas if (p == buf + 1 && buf[0] == '-')
550 3efd8e31 2022-10-23 thomas goto nodigits;
551 3efd8e31 2022-10-23 thomas if (c == EOF || allowed_to_end_number(c)) {
552 3efd8e31 2022-10-23 thomas const char *errstr = NULL;
554 3efd8e31 2022-10-23 thomas *p = '\0';
555 3efd8e31 2022-10-23 thomas yylval.v.number = strtonum(buf, LLONG_MIN,
556 3efd8e31 2022-10-23 thomas LLONG_MAX, &errstr);
557 3efd8e31 2022-10-23 thomas if (errstr) {
558 3efd8e31 2022-10-23 thomas yyerror("\"%s\" invalid number: %s",
559 3efd8e31 2022-10-23 thomas buf, errstr);
560 3efd8e31 2022-10-23 thomas return (findeol());
562 3efd8e31 2022-10-23 thomas return (NUMBER);
564 3efd8e31 2022-10-23 thomas nodigits:
565 3efd8e31 2022-10-23 thomas while (p > buf + 1)
566 3efd8e31 2022-10-23 thomas lungetc(*--p);
567 3efd8e31 2022-10-23 thomas c = *--p;
568 3efd8e31 2022-10-23 thomas if (c == '-')
569 3efd8e31 2022-10-23 thomas return (c);
573 3efd8e31 2022-10-23 thomas #define allowed_in_string(x) \
574 3efd8e31 2022-10-23 thomas (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
575 3efd8e31 2022-10-23 thomas x != '{' && x != '}' && \
576 3efd8e31 2022-10-23 thomas x != '!' && x != '=' && x != '#' && \
577 3efd8e31 2022-10-23 thomas x != ','))
579 3efd8e31 2022-10-23 thomas if (isalnum(c) || c == ':' || c == '_') {
581 3efd8e31 2022-10-23 thomas *p++ = c;
582 3efd8e31 2022-10-23 thomas if ((unsigned)(p-buf) >= sizeof(buf)) {
583 3efd8e31 2022-10-23 thomas yyerror("string too long");
584 3efd8e31 2022-10-23 thomas return (findeol());
586 3efd8e31 2022-10-23 thomas c = lgetc(0);
587 3efd8e31 2022-10-23 thomas } while (c != EOF && (allowed_in_string(c)));
588 3efd8e31 2022-10-23 thomas lungetc(c);
589 3efd8e31 2022-10-23 thomas *p = '\0';
590 3efd8e31 2022-10-23 thomas token = lookup(buf);
591 3efd8e31 2022-10-23 thomas if (token == STRING) {
592 3efd8e31 2022-10-23 thomas yylval.v.string = strdup(buf);
593 3efd8e31 2022-10-23 thomas if (yylval.v.string == NULL)
594 3efd8e31 2022-10-23 thomas err(1, "yylex: strdup");
596 3efd8e31 2022-10-23 thomas return (token);
598 3efd8e31 2022-10-23 thomas if (c == '\n') {
599 3efd8e31 2022-10-23 thomas yylval.lineno = file->lineno;
600 3efd8e31 2022-10-23 thomas file->lineno++;
602 3efd8e31 2022-10-23 thomas if (c == EOF)
603 3efd8e31 2022-10-23 thomas return (0);
604 3efd8e31 2022-10-23 thomas return (c);
608 3efd8e31 2022-10-23 thomas check_file_secrecy(int fd, const char *fname)
610 3efd8e31 2022-10-23 thomas struct stat st;
612 3efd8e31 2022-10-23 thomas if (fstat(fd, &st)) {
613 3efd8e31 2022-10-23 thomas log_warn("cannot stat %s", fname);
614 3efd8e31 2022-10-23 thomas return (-1);
616 3efd8e31 2022-10-23 thomas if (st.st_uid != 0 && st.st_uid != getuid()) {
617 3efd8e31 2022-10-23 thomas log_warnx("%s: owner not root or current user", fname);
618 3efd8e31 2022-10-23 thomas return (-1);
620 3efd8e31 2022-10-23 thomas if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
621 3efd8e31 2022-10-23 thomas log_warnx("%s: group writable or world read/writable", fname);
622 3efd8e31 2022-10-23 thomas return (-1);
624 3efd8e31 2022-10-23 thomas return (0);
627 3efd8e31 2022-10-23 thomas struct file *
628 3efd8e31 2022-10-23 thomas newfile(const char *name, int secret)
630 3efd8e31 2022-10-23 thomas struct file *nfile;
632 3efd8e31 2022-10-23 thomas nfile = calloc(1, sizeof(struct file));
633 3efd8e31 2022-10-23 thomas if (nfile == NULL) {
634 3efd8e31 2022-10-23 thomas log_warn("calloc");
635 3efd8e31 2022-10-23 thomas return (NULL);
637 3efd8e31 2022-10-23 thomas nfile->name = strdup(name);
638 3efd8e31 2022-10-23 thomas if (nfile->name == NULL) {
639 3efd8e31 2022-10-23 thomas log_warn("strdup");
640 3efd8e31 2022-10-23 thomas free(nfile);
641 3efd8e31 2022-10-23 thomas return (NULL);
643 3efd8e31 2022-10-23 thomas nfile->stream = fopen(nfile->name, "r");
644 3efd8e31 2022-10-23 thomas if (nfile->stream == NULL) {
645 3efd8e31 2022-10-23 thomas /* no warning, we don't require a conf file */
646 3efd8e31 2022-10-23 thomas free(nfile->name);
647 3efd8e31 2022-10-23 thomas free(nfile);
648 3efd8e31 2022-10-23 thomas return (NULL);
649 3efd8e31 2022-10-23 thomas } else if (secret &&
650 3efd8e31 2022-10-23 thomas check_file_secrecy(fileno(nfile->stream), nfile->name)) {
651 3efd8e31 2022-10-23 thomas fclose(nfile->stream);
652 3efd8e31 2022-10-23 thomas free(nfile->name);
653 3efd8e31 2022-10-23 thomas free(nfile);
654 3efd8e31 2022-10-23 thomas return (NULL);
656 3efd8e31 2022-10-23 thomas nfile->lineno = 1;
657 3efd8e31 2022-10-23 thomas return (nfile);
660 3efd8e31 2022-10-23 thomas static void
661 3efd8e31 2022-10-23 thomas closefile(struct file *xfile)
663 3efd8e31 2022-10-23 thomas fclose(xfile->stream);
664 3efd8e31 2022-10-23 thomas free(xfile->name);
665 3efd8e31 2022-10-23 thomas free(xfile);
669 3efd8e31 2022-10-23 thomas parse_config(const char *filename, enum gotd_procid proc_id,
670 3efd8e31 2022-10-23 thomas struct gotd *env)
672 3efd8e31 2022-10-23 thomas struct sym *sym, *next;
673 88f1bb6d 2023-01-02 thomas struct gotd_repo *repo;
675 3efd8e31 2022-10-23 thomas memset(env, 0, sizeof(*env));
677 3efd8e31 2022-10-23 thomas gotd = env;
678 3efd8e31 2022-10-23 thomas gotd_proc_id = proc_id;
679 3efd8e31 2022-10-23 thomas TAILQ_INIT(&gotd->repos);
681 3efd8e31 2022-10-23 thomas /* Apply default values. */
682 3efd8e31 2022-10-23 thomas if (strlcpy(gotd->unix_socket_path, GOTD_UNIX_SOCKET,
683 3efd8e31 2022-10-23 thomas sizeof(gotd->unix_socket_path)) >= sizeof(gotd->unix_socket_path)) {
684 3efd8e31 2022-10-23 thomas fprintf(stderr, "%s: unix socket path too long", __func__);
685 3efd8e31 2022-10-23 thomas return -1;
687 3efd8e31 2022-10-23 thomas if (strlcpy(gotd->user_name, GOTD_USER,
688 3efd8e31 2022-10-23 thomas sizeof(gotd->user_name)) >= sizeof(gotd->user_name)) {
689 3efd8e31 2022-10-23 thomas fprintf(stderr, "%s: user name too long", __func__);
690 3efd8e31 2022-10-23 thomas return -1;
693 0781db0e 2023-01-06 thomas gotd->request_timeout.tv_sec = GOTD_DEFAULT_REQUEST_TIMEOUT;
694 0781db0e 2023-01-06 thomas gotd->request_timeout.tv_usec = 0;
696 3efd8e31 2022-10-23 thomas file = newfile(filename, 0);
697 3efd8e31 2022-10-23 thomas if (file == NULL) {
698 3efd8e31 2022-10-23 thomas /* just return, as we don't require a conf file */
699 3efd8e31 2022-10-23 thomas return (0);
702 3efd8e31 2022-10-23 thomas yyparse();
703 3efd8e31 2022-10-23 thomas errors = file->errors;
704 3efd8e31 2022-10-23 thomas closefile(file);
706 3efd8e31 2022-10-23 thomas /* Free macros and check which have not been used. */
707 3efd8e31 2022-10-23 thomas TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
708 3efd8e31 2022-10-23 thomas if ((gotd->verbosity > 1) && !sym->used)
709 3efd8e31 2022-10-23 thomas fprintf(stderr, "warning: macro '%s' not used\n",
710 3efd8e31 2022-10-23 thomas sym->nam);
711 3efd8e31 2022-10-23 thomas if (!sym->persist) {
712 3efd8e31 2022-10-23 thomas free(sym->nam);
713 3efd8e31 2022-10-23 thomas free(sym->val);
714 3efd8e31 2022-10-23 thomas TAILQ_REMOVE(&symhead, sym, entry);
715 3efd8e31 2022-10-23 thomas free(sym);
719 3efd8e31 2022-10-23 thomas if (errors)
720 3efd8e31 2022-10-23 thomas return (-1);
722 88f1bb6d 2023-01-02 thomas TAILQ_FOREACH(repo, &gotd->repos, entry) {
723 88f1bb6d 2023-01-02 thomas if (repo->path[0] == '\0') {
724 0cbf8de7 2023-01-02 thomas log_warnx("repository \"%s\": no path provided in "
725 0cbf8de7 2023-01-02 thomas "configuration file", repo->name);
726 88f1bb6d 2023-01-02 thomas return (-1);
730 4d24b1fd 2023-01-19 thomas if (proc_id == PROC_GOTD && TAILQ_EMPTY(&gotd->repos)) {
731 4d24b1fd 2023-01-19 thomas log_warnx("no repository defined in configuration file");
732 4d24b1fd 2023-01-19 thomas return (-1);
735 3efd8e31 2022-10-23 thomas return (0);
738 0781db0e 2023-01-06 thomas static int
739 0781db0e 2023-01-06 thomas uid_connection_limit_cmp(const void *pa, const void *pb)
741 0781db0e 2023-01-06 thomas const struct gotd_uid_connection_limit *a = pa, *b = pb;
743 0781db0e 2023-01-06 thomas if (a->uid < b->uid)
744 0781db0e 2023-01-06 thomas return -1;
745 0781db0e 2023-01-06 thomas else if (a->uid > b->uid);
746 0781db0e 2023-01-06 thomas return 1;
748 0781db0e 2023-01-06 thomas return 0;
751 0781db0e 2023-01-06 thomas static int
752 0781db0e 2023-01-06 thomas conf_limit_user_connections(const char *user, int maximum)
754 0781db0e 2023-01-06 thomas uid_t uid;
755 0781db0e 2023-01-06 thomas struct gotd_uid_connection_limit *limit;
756 0781db0e 2023-01-06 thomas size_t nlimits;
758 0781db0e 2023-01-06 thomas if (maximum < 1) {
759 0781db0e 2023-01-06 thomas yyerror("max connections cannot be smaller 1");
760 0781db0e 2023-01-06 thomas return -1;
762 0781db0e 2023-01-06 thomas if (maximum > GOTD_MAXCLIENTS) {
763 0781db0e 2023-01-06 thomas yyerror("max connections must be <= %d", GOTD_MAXCLIENTS);
764 0781db0e 2023-01-06 thomas return -1;
767 0781db0e 2023-01-06 thomas if (gotd_auth_parseuid(user, &uid) == -1) {
768 0781db0e 2023-01-06 thomas yyerror("%s: no such user", user);
769 0781db0e 2023-01-06 thomas return -1;
772 0781db0e 2023-01-06 thomas limit = gotd_find_uid_connection_limit(gotd->connection_limits,
773 0781db0e 2023-01-06 thomas gotd->nconnection_limits, uid);
774 0781db0e 2023-01-06 thomas if (limit) {
775 0781db0e 2023-01-06 thomas limit->max_connections = maximum;
776 0781db0e 2023-01-06 thomas return 0;
779 0781db0e 2023-01-06 thomas limit = gotd->connection_limits;
780 0781db0e 2023-01-06 thomas nlimits = gotd->nconnection_limits + 1;
781 0781db0e 2023-01-06 thomas limit = reallocarray(limit, nlimits, sizeof(*limit));
782 0781db0e 2023-01-06 thomas if (limit == NULL)
783 0781db0e 2023-01-06 thomas fatal("reallocarray");
785 0781db0e 2023-01-06 thomas limit[nlimits - 1].uid = uid;
786 0781db0e 2023-01-06 thomas limit[nlimits - 1].max_connections = maximum;
788 0781db0e 2023-01-06 thomas gotd->connection_limits = limit;
789 0781db0e 2023-01-06 thomas gotd->nconnection_limits = nlimits;
790 0781db0e 2023-01-06 thomas qsort(gotd->connection_limits, gotd->nconnection_limits,
791 0781db0e 2023-01-06 thomas sizeof(gotd->connection_limits[0]), uid_connection_limit_cmp);
793 0781db0e 2023-01-06 thomas return 0;
796 3efd8e31 2022-10-23 thomas static struct gotd_repo *
797 3efd8e31 2022-10-23 thomas conf_new_repo(const char *name)
799 3efd8e31 2022-10-23 thomas struct gotd_repo *repo;
801 a42b418b 2023-01-02 thomas if (name[0] == '\0') {
802 a42b418b 2023-01-02 thomas fatalx("syntax error: empty repository name found in %s",
803 a42b418b 2023-01-02 thomas file->name);
806 0cbf8de7 2023-01-02 thomas if (strchr(name, '\n') != NULL)
807 0cbf8de7 2023-01-02 thomas fatalx("repository names must not contain linefeeds: %s", name);
809 3efd8e31 2022-10-23 thomas repo = calloc(1, sizeof(*repo));
810 3efd8e31 2022-10-23 thomas if (repo == NULL)
811 3efd8e31 2022-10-23 thomas fatalx("%s: calloc", __func__);
813 729a7e24 2022-11-17 thomas STAILQ_INIT(&repo->rules);
815 3efd8e31 2022-10-23 thomas if (strlcpy(repo->name, name, sizeof(repo->name)) >=
816 3efd8e31 2022-10-23 thomas sizeof(repo->name))
817 3efd8e31 2022-10-23 thomas fatalx("%s: strlcpy", __func__);
819 3efd8e31 2022-10-23 thomas TAILQ_INSERT_TAIL(&gotd->repos, repo, entry);
820 3efd8e31 2022-10-23 thomas gotd->nrepos++;
822 3efd8e31 2022-10-23 thomas return repo;
825 729a7e24 2022-11-17 thomas static void
826 729a7e24 2022-11-17 thomas conf_new_access_rule(struct gotd_repo *repo, enum gotd_access access,
827 729a7e24 2022-11-17 thomas int authorization, char *identifier)
829 729a7e24 2022-11-17 thomas struct gotd_access_rule *rule;
831 729a7e24 2022-11-17 thomas rule = calloc(1, sizeof(*rule));
832 729a7e24 2022-11-17 thomas if (rule == NULL)
833 729a7e24 2022-11-17 thomas fatal("calloc");
835 729a7e24 2022-11-17 thomas rule->access = access;
836 729a7e24 2022-11-17 thomas rule->authorization = authorization;
837 729a7e24 2022-11-17 thomas rule->identifier = identifier;
839 729a7e24 2022-11-17 thomas STAILQ_INSERT_TAIL(&repo->rules, rule, entry);
843 3efd8e31 2022-10-23 thomas symset(const char *nam, const char *val, int persist)
845 3efd8e31 2022-10-23 thomas struct sym *sym;
847 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(sym, &symhead, entry) {
848 3efd8e31 2022-10-23 thomas if (strcmp(nam, sym->nam) == 0)
852 3efd8e31 2022-10-23 thomas if (sym != NULL) {
853 3efd8e31 2022-10-23 thomas if (sym->persist == 1)
854 3efd8e31 2022-10-23 thomas return (0);
856 3efd8e31 2022-10-23 thomas free(sym->nam);
857 3efd8e31 2022-10-23 thomas free(sym->val);
858 3efd8e31 2022-10-23 thomas TAILQ_REMOVE(&symhead, sym, entry);
859 3efd8e31 2022-10-23 thomas free(sym);
862 3efd8e31 2022-10-23 thomas sym = calloc(1, sizeof(*sym));
863 3efd8e31 2022-10-23 thomas if (sym == NULL)
864 3efd8e31 2022-10-23 thomas return (-1);
866 3efd8e31 2022-10-23 thomas sym->nam = strdup(nam);
867 3efd8e31 2022-10-23 thomas if (sym->nam == NULL) {
868 3efd8e31 2022-10-23 thomas free(sym);
869 3efd8e31 2022-10-23 thomas return (-1);
871 3efd8e31 2022-10-23 thomas sym->val = strdup(val);
872 3efd8e31 2022-10-23 thomas if (sym->val == NULL) {
873 3efd8e31 2022-10-23 thomas free(sym->nam);
874 3efd8e31 2022-10-23 thomas free(sym);
875 3efd8e31 2022-10-23 thomas return (-1);
877 3efd8e31 2022-10-23 thomas sym->used = 0;
878 3efd8e31 2022-10-23 thomas sym->persist = persist;
879 3efd8e31 2022-10-23 thomas TAILQ_INSERT_TAIL(&symhead, sym, entry);
880 3efd8e31 2022-10-23 thomas return (0);
884 3efd8e31 2022-10-23 thomas symget(const char *nam)
886 3efd8e31 2022-10-23 thomas struct sym *sym;
888 3efd8e31 2022-10-23 thomas TAILQ_FOREACH(sym, &symhead, entry) {
889 3efd8e31 2022-10-23 thomas if (strcmp(nam, sym->nam) == 0) {
890 3efd8e31 2022-10-23 thomas sym->used = 1;
891 3efd8e31 2022-10-23 thomas return (sym->val);
894 3efd8e31 2022-10-23 thomas return (NULL);