2 13b2bc37 2022-10-23 stsp * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
3 13b2bc37 2022-10-23 stsp * Copyright (c) 2016-2019, 2020-2021 Tracey Emery <tracey@traceyemery.net>
4 13b2bc37 2022-10-23 stsp * Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
5 13b2bc37 2022-10-23 stsp * Copyright (c) 2004 Ryan McBride <mcbride@openbsd.org>
6 13b2bc37 2022-10-23 stsp * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
7 13b2bc37 2022-10-23 stsp * Copyright (c) 2001 Markus Friedl. All rights reserved.
8 13b2bc37 2022-10-23 stsp * Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
9 13b2bc37 2022-10-23 stsp * Copyright (c) 2001 Theo de Raadt. All rights reserved.
11 13b2bc37 2022-10-23 stsp * Permission to use, copy, modify, and distribute this software for any
12 13b2bc37 2022-10-23 stsp * purpose with or without fee is hereby granted, provided that the above
13 13b2bc37 2022-10-23 stsp * copyright notice and this permission notice appear in all copies.
15 13b2bc37 2022-10-23 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
16 13b2bc37 2022-10-23 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
17 13b2bc37 2022-10-23 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
18 13b2bc37 2022-10-23 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19 13b2bc37 2022-10-23 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
20 13b2bc37 2022-10-23 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
21 13b2bc37 2022-10-23 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
25 13b2bc37 2022-10-23 stsp #include <sys/time.h>
26 13b2bc37 2022-10-23 stsp #include <sys/types.h>
27 13b2bc37 2022-10-23 stsp #include <sys/queue.h>
28 13b2bc37 2022-10-23 stsp #include <sys/stat.h>
30 13b2bc37 2022-10-23 stsp #include <ctype.h>
31 13b2bc37 2022-10-23 stsp #include <err.h>
32 13b2bc37 2022-10-23 stsp #include <errno.h>
33 13b2bc37 2022-10-23 stsp #include <event.h>
34 13b2bc37 2022-10-23 stsp #include <imsg.h>
35 13b2bc37 2022-10-23 stsp #include <limits.h>
36 13b2bc37 2022-10-23 stsp #include <sha1.h>
37 13b2bc37 2022-10-23 stsp #include <stdarg.h>
38 13b2bc37 2022-10-23 stsp #include <stdlib.h>
39 13b2bc37 2022-10-23 stsp #include <stdio.h>
40 13b2bc37 2022-10-23 stsp #include <string.h>
41 13b2bc37 2022-10-23 stsp #include <syslog.h>
42 13b2bc37 2022-10-23 stsp #include <unistd.h>
44 13b2bc37 2022-10-23 stsp #include "got_error.h"
45 13b2bc37 2022-10-23 stsp #include "got_path.h"
47 13b2bc37 2022-10-23 stsp #include "log.h"
48 13b2bc37 2022-10-23 stsp #include "gotd.h"
49 40b85cca 2023-01-03 stsp #include "auth.h"
50 40b85cca 2023-01-03 stsp #include "listen.h"
52 13b2bc37 2022-10-23 stsp TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
53 13b2bc37 2022-10-23 stsp static struct file {
54 13b2bc37 2022-10-23 stsp TAILQ_ENTRY(file) entry;
55 13b2bc37 2022-10-23 stsp FILE *stream;
60 13b2bc37 2022-10-23 stsp struct file *newfile(const char *, int);
61 13b2bc37 2022-10-23 stsp static void closefile(struct file *);
62 13b2bc37 2022-10-23 stsp int check_file_secrecy(int, const char *);
63 13b2bc37 2022-10-23 stsp int yyparse(void);
64 13b2bc37 2022-10-23 stsp int yylex(void);
65 13b2bc37 2022-10-23 stsp int yyerror(const char *, ...)
66 13b2bc37 2022-10-23 stsp __attribute__((__format__ (printf, 1, 2)))
67 13b2bc37 2022-10-23 stsp __attribute__((__nonnull__ (1)));
68 13b2bc37 2022-10-23 stsp int kw_cmp(const void *, const void *);
69 13b2bc37 2022-10-23 stsp int lookup(char *);
70 13b2bc37 2022-10-23 stsp int lgetc(int);
71 13b2bc37 2022-10-23 stsp int lungetc(int);
72 13b2bc37 2022-10-23 stsp int findeol(void);
74 13b2bc37 2022-10-23 stsp TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
75 13b2bc37 2022-10-23 stsp struct sym {
76 13b2bc37 2022-10-23 stsp TAILQ_ENTRY(sym) entry;
78 13b2bc37 2022-10-23 stsp int persist;
83 13b2bc37 2022-10-23 stsp int symset(const char *, const char *, int);
84 13b2bc37 2022-10-23 stsp char *symget(const char *);
86 13b2bc37 2022-10-23 stsp static int errors;
88 13b2bc37 2022-10-23 stsp static struct gotd *gotd;
89 13b2bc37 2022-10-23 stsp static struct gotd_repo *new_repo;
90 fc89c900 2023-01-03 op static int conf_limit_user_connections(const char *, int);
91 13b2bc37 2022-10-23 stsp static struct gotd_repo *conf_new_repo(const char *);
92 533abaaa 2022-11-18 op static void conf_new_access_rule(struct gotd_repo *,
93 533abaaa 2022-11-18 op enum gotd_access, int, char *);
94 13b2bc37 2022-10-23 stsp static enum gotd_procid gotd_proc_id;
96 13b2bc37 2022-10-23 stsp typedef struct {
98 13b2bc37 2022-10-23 stsp long long number;
99 13b2bc37 2022-10-23 stsp char *string;
100 40b85cca 2023-01-03 stsp struct timeval tv;
102 13b2bc37 2022-10-23 stsp int lineno;
107 83577462 2023-01-05 stsp %token PATH ERROR LISTEN ON USER REPOSITORY PERMIT DENY
108 40b85cca 2023-01-03 stsp %token RO RW CONNECTION LIMIT REQUEST TIMEOUT
110 13b2bc37 2022-10-23 stsp %token <v.string> STRING
111 13b2bc37 2022-10-23 stsp %token <v.number> NUMBER
112 13b2bc37 2022-10-23 stsp %type <v.number> boolean
113 40b85cca 2023-01-03 stsp %type <v.tv> timeout
118 13b2bc37 2022-10-23 stsp | grammar '\n'
119 13b2bc37 2022-10-23 stsp | grammar main '\n'
120 13b2bc37 2022-10-23 stsp | grammar repository '\n'
123 13b2bc37 2022-10-23 stsp boolean : STRING {
124 13b2bc37 2022-10-23 stsp if (strcasecmp($1, "1") == 0 ||
125 13b2bc37 2022-10-23 stsp strcasecmp($1, "yes") == 0 ||
126 13b2bc37 2022-10-23 stsp strcasecmp($1, "on") == 0)
128 13b2bc37 2022-10-23 stsp else if (strcasecmp($1, "0") == 0 ||
129 13b2bc37 2022-10-23 stsp strcasecmp($1, "off") == 0 ||
130 13b2bc37 2022-10-23 stsp strcasecmp($1, "no") == 0)
133 13b2bc37 2022-10-23 stsp yyerror("invalid boolean value '%s'", $1);
139 13b2bc37 2022-10-23 stsp | ON { $$ = 1; }
140 13b2bc37 2022-10-23 stsp | NUMBER { $$ = $1; }
143 40b85cca 2023-01-03 stsp timeout : NUMBER {
144 40b85cca 2023-01-03 stsp if ($1 < 0) {
145 40b85cca 2023-01-03 stsp yyerror("invalid timeout: %lld", $1);
148 40b85cca 2023-01-03 stsp $$.tv_sec = $1;
149 40b85cca 2023-01-03 stsp $$.tv_usec = 0;
152 2be11cde 2023-01-03 op const char *errstr;
153 2be11cde 2023-01-03 op const char *type = "seconds";
157 2be11cde 2023-01-03 op if (*$1 == '\0') {
158 2be11cde 2023-01-03 op yyerror("invalid number of seconds: %s", $1);
163 2be11cde 2023-01-03 op len = strlen($1);
164 2be11cde 2023-01-03 op switch ($1[len - 1]) {
167 2be11cde 2023-01-03 op $1[len - 1] = '\0';
171 2be11cde 2023-01-03 op type = "minutes";
173 2be11cde 2023-01-03 op $1[len - 1] = '\0';
177 2be11cde 2023-01-03 op type = "hours";
178 2be11cde 2023-01-03 op mul = 60 * 60;
179 2be11cde 2023-01-03 op $1[len - 1] = '\0';
183 2be11cde 2023-01-03 op $$.tv_usec = 0;
184 71cd355c 2023-01-03 op $$.tv_sec = strtonum($1, 0, INT_MAX / mul, &errstr);
185 2be11cde 2023-01-03 op if (errstr) {
186 2be11cde 2023-01-03 op yyerror("number of %s is %s: %s", type,
192 2be11cde 2023-01-03 op $$.tv_sec *= mul;
197 83577462 2023-01-05 stsp main : LISTEN ON STRING {
198 abe844e2 2023-01-18 op if (!got_path_is_absolute($3))
199 abe844e2 2023-01-18 op yyerror("bad unix socket path \"%s\": "
200 abe844e2 2023-01-18 op "must be an absolute path", $3);
202 d93ecf7d 2022-12-14 stsp if (gotd_proc_id == PROC_LISTEN) {
203 83577462 2023-01-05 stsp if (strlcpy(gotd->unix_socket_path, $3,
204 13b2bc37 2022-10-23 stsp sizeof(gotd->unix_socket_path)) >=
205 13b2bc37 2022-10-23 stsp sizeof(gotd->unix_socket_path)) {
206 13b2bc37 2022-10-23 stsp yyerror("%s: unix socket path too long",
214 13b2bc37 2022-10-23 stsp | USER STRING {
215 13b2bc37 2022-10-23 stsp if (strlcpy(gotd->user_name, $2,
216 13b2bc37 2022-10-23 stsp sizeof(gotd->user_name)) >=
217 13b2bc37 2022-10-23 stsp sizeof(gotd->user_name)) {
218 13b2bc37 2022-10-23 stsp yyerror("%s: user name too long", __func__);
224 40b85cca 2023-01-03 stsp | connection
227 40b85cca 2023-01-03 stsp connection : CONNECTION '{' optnl conflags_l '}'
228 40b85cca 2023-01-03 stsp | CONNECTION conflags
230 40b85cca 2023-01-03 stsp conflags_l : conflags optnl conflags_l
231 40b85cca 2023-01-03 stsp | conflags optnl
234 40b85cca 2023-01-03 stsp conflags : REQUEST TIMEOUT timeout {
235 46e48ac7 2023-01-03 stsp if ($3.tv_sec <= 0) {
236 46e48ac7 2023-01-03 stsp yyerror("invalid timeout: %lld", $3.tv_sec);
239 40b85cca 2023-01-03 stsp memcpy(&gotd->request_timeout, &$3,
240 40b85cca 2023-01-03 stsp sizeof(gotd->request_timeout));
242 40b85cca 2023-01-03 stsp | LIMIT USER STRING NUMBER {
243 40b85cca 2023-01-03 stsp if (gotd_proc_id == PROC_LISTEN &&
244 40b85cca 2023-01-03 stsp conf_limit_user_connections($3, $4) == -1) {
252 13b2bc37 2022-10-23 stsp repository : REPOSITORY STRING {
253 13b2bc37 2022-10-23 stsp struct gotd_repo *repo;
255 13b2bc37 2022-10-23 stsp TAILQ_FOREACH(repo, &gotd->repos, entry) {
256 13b2bc37 2022-10-23 stsp if (strcmp(repo->name, $2) == 0) {
257 13b2bc37 2022-10-23 stsp yyerror("duplicate repository '%s'", $2);
263 5e25db14 2022-12-29 stsp if (gotd_proc_id == PROC_GOTD ||
264 5e25db14 2022-12-29 stsp gotd_proc_id == PROC_AUTH) {
265 13b2bc37 2022-10-23 stsp new_repo = conf_new_repo($2);
268 13b2bc37 2022-10-23 stsp } '{' optnl repoopts2 '}' {
272 13b2bc37 2022-10-23 stsp repoopts1 : PATH STRING {
273 5e25db14 2022-12-29 stsp if (gotd_proc_id == PROC_GOTD ||
274 5e25db14 2022-12-29 stsp gotd_proc_id == PROC_AUTH) {
275 13b2bc37 2022-10-23 stsp if (!got_path_is_absolute($2)) {
276 13b2bc37 2022-10-23 stsp yyerror("%s: path %s is not absolute",
277 13b2bc37 2022-10-23 stsp __func__, $2);
281 9b7f22a6 2023-01-08 stsp if (realpath($2, new_repo->path) == NULL) {
282 9b7f22a6 2023-01-08 stsp yyerror("realpath %s: %s", $2, strerror(errno));
289 0ccf3acb 2022-11-16 stsp | PERMIT RO STRING {
290 5e25db14 2022-12-29 stsp if (gotd_proc_id == PROC_AUTH) {
291 0ccf3acb 2022-11-16 stsp conf_new_access_rule(new_repo,
292 0ccf3acb 2022-11-16 stsp GOTD_ACCESS_PERMITTED, GOTD_AUTH_READ, $3);
295 0ccf3acb 2022-11-16 stsp | PERMIT RW STRING {
296 5e25db14 2022-12-29 stsp if (gotd_proc_id == PROC_AUTH) {
297 0ccf3acb 2022-11-16 stsp conf_new_access_rule(new_repo,
298 0ccf3acb 2022-11-16 stsp GOTD_ACCESS_PERMITTED,
299 0ccf3acb 2022-11-16 stsp GOTD_AUTH_READ | GOTD_AUTH_WRITE, $3);
302 0ccf3acb 2022-11-16 stsp | DENY STRING {
303 5e25db14 2022-12-29 stsp if (gotd_proc_id == PROC_AUTH) {
304 0ccf3acb 2022-11-16 stsp conf_new_access_rule(new_repo,
305 0ccf3acb 2022-11-16 stsp GOTD_ACCESS_DENIED, 0, $2);
310 13b2bc37 2022-10-23 stsp repoopts2 : repoopts2 repoopts1 nl
311 13b2bc37 2022-10-23 stsp | repoopts1 optnl
314 13b2bc37 2022-10-23 stsp nl : '\n' optnl
317 13b2bc37 2022-10-23 stsp optnl : '\n' optnl /* zero or more newlines */
318 13b2bc37 2022-10-23 stsp | /* empty */
323 13b2bc37 2022-10-23 stsp struct keywords {
324 13b2bc37 2022-10-23 stsp const char *k_name;
329 13b2bc37 2022-10-23 stsp yyerror(const char *fmt, ...)
331 13b2bc37 2022-10-23 stsp va_list ap;
334 13b2bc37 2022-10-23 stsp file->errors++;
335 13b2bc37 2022-10-23 stsp va_start(ap, fmt);
336 13b2bc37 2022-10-23 stsp if (vasprintf(&msg, fmt, ap) == -1)
337 13b2bc37 2022-10-23 stsp fatalx("yyerror vasprintf");
338 13b2bc37 2022-10-23 stsp va_end(ap);
339 13b2bc37 2022-10-23 stsp logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
341 13b2bc37 2022-10-23 stsp return (0);
345 13b2bc37 2022-10-23 stsp kw_cmp(const void *k, const void *e)
347 13b2bc37 2022-10-23 stsp return (strcmp(k, ((const struct keywords *)e)->k_name));
351 13b2bc37 2022-10-23 stsp lookup(char *s)
353 13b2bc37 2022-10-23 stsp /* This has to be sorted always. */
354 13b2bc37 2022-10-23 stsp static const struct keywords keywords[] = {
355 40b85cca 2023-01-03 stsp { "connection", CONNECTION },
356 0ccf3acb 2022-11-16 stsp { "deny", DENY },
357 40b85cca 2023-01-03 stsp { "limit", LIMIT },
358 83577462 2023-01-05 stsp { "listen", LISTEN },
359 13b2bc37 2022-10-23 stsp { "on", ON },
360 13b2bc37 2022-10-23 stsp { "path", PATH },
361 0ccf3acb 2022-11-16 stsp { "permit", PERMIT },
362 13b2bc37 2022-10-23 stsp { "repository", REPOSITORY },
363 40b85cca 2023-01-03 stsp { "request", REQUEST },
364 0ccf3acb 2022-11-16 stsp { "ro", RO },
365 0ccf3acb 2022-11-16 stsp { "rw", RW },
366 40b85cca 2023-01-03 stsp { "timeout", TIMEOUT },
367 13b2bc37 2022-10-23 stsp { "user", USER },
369 13b2bc37 2022-10-23 stsp const struct keywords *p;
371 13b2bc37 2022-10-23 stsp p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
372 13b2bc37 2022-10-23 stsp sizeof(keywords[0]), kw_cmp);
375 13b2bc37 2022-10-23 stsp return (p->k_val);
377 13b2bc37 2022-10-23 stsp return (STRING);
380 13b2bc37 2022-10-23 stsp #define MAXPUSHBACK 128
382 13b2bc37 2022-10-23 stsp unsigned char *parsebuf;
383 13b2bc37 2022-10-23 stsp int parseindex;
384 13b2bc37 2022-10-23 stsp unsigned char pushback_buffer[MAXPUSHBACK];
385 13b2bc37 2022-10-23 stsp int pushback_index = 0;
388 13b2bc37 2022-10-23 stsp lgetc(int quotec)
390 13b2bc37 2022-10-23 stsp int c, next;
392 13b2bc37 2022-10-23 stsp if (parsebuf) {
393 13b2bc37 2022-10-23 stsp /* Read character from the parsebuffer instead of input. */
394 13b2bc37 2022-10-23 stsp if (parseindex >= 0) {
395 13b2bc37 2022-10-23 stsp c = parsebuf[parseindex++];
396 13b2bc37 2022-10-23 stsp if (c != '\0')
397 13b2bc37 2022-10-23 stsp return (c);
398 13b2bc37 2022-10-23 stsp parsebuf = NULL;
400 13b2bc37 2022-10-23 stsp parseindex++;
403 13b2bc37 2022-10-23 stsp if (pushback_index)
404 13b2bc37 2022-10-23 stsp return (pushback_buffer[--pushback_index]);
406 13b2bc37 2022-10-23 stsp if (quotec) {
407 13b2bc37 2022-10-23 stsp c = getc(file->stream);
408 13b2bc37 2022-10-23 stsp if (c == EOF)
409 13b2bc37 2022-10-23 stsp yyerror("reached end of file while parsing "
410 13b2bc37 2022-10-23 stsp "quoted string");
411 13b2bc37 2022-10-23 stsp return (c);
414 13b2bc37 2022-10-23 stsp c = getc(file->stream);
415 13b2bc37 2022-10-23 stsp while (c == '\\') {
416 13b2bc37 2022-10-23 stsp next = getc(file->stream);
417 13b2bc37 2022-10-23 stsp if (next != '\n') {
421 13b2bc37 2022-10-23 stsp yylval.lineno = file->lineno;
422 13b2bc37 2022-10-23 stsp file->lineno++;
423 13b2bc37 2022-10-23 stsp c = getc(file->stream);
426 13b2bc37 2022-10-23 stsp return (c);
430 13b2bc37 2022-10-23 stsp lungetc(int c)
432 13b2bc37 2022-10-23 stsp if (c == EOF)
433 13b2bc37 2022-10-23 stsp return (EOF);
434 13b2bc37 2022-10-23 stsp if (parsebuf) {
435 13b2bc37 2022-10-23 stsp parseindex--;
436 13b2bc37 2022-10-23 stsp if (parseindex >= 0)
437 13b2bc37 2022-10-23 stsp return (c);
439 13b2bc37 2022-10-23 stsp if (pushback_index < MAXPUSHBACK-1)
440 13b2bc37 2022-10-23 stsp return (pushback_buffer[pushback_index++] = c);
442 13b2bc37 2022-10-23 stsp return (EOF);
446 13b2bc37 2022-10-23 stsp findeol(void)
450 13b2bc37 2022-10-23 stsp parsebuf = NULL;
452 13b2bc37 2022-10-23 stsp /* Skip to either EOF or the first real EOL. */
453 13b2bc37 2022-10-23 stsp while (1) {
454 13b2bc37 2022-10-23 stsp if (pushback_index)
455 13b2bc37 2022-10-23 stsp c = pushback_buffer[--pushback_index];
457 13b2bc37 2022-10-23 stsp c = lgetc(0);
458 13b2bc37 2022-10-23 stsp if (c == '\n') {
459 13b2bc37 2022-10-23 stsp file->lineno++;
462 13b2bc37 2022-10-23 stsp if (c == EOF)
465 13b2bc37 2022-10-23 stsp return (ERROR);
469 13b2bc37 2022-10-23 stsp yylex(void)
471 13b2bc37 2022-10-23 stsp unsigned char buf[8096];
472 13b2bc37 2022-10-23 stsp unsigned char *p, *val;
473 13b2bc37 2022-10-23 stsp int quotec, next, c;
478 13b2bc37 2022-10-23 stsp c = lgetc(0);
479 13b2bc37 2022-10-23 stsp while (c == ' ' || c == '\t')
480 13b2bc37 2022-10-23 stsp c = lgetc(0); /* nothing */
482 13b2bc37 2022-10-23 stsp yylval.lineno = file->lineno;
483 13b2bc37 2022-10-23 stsp if (c == '#') {
484 13b2bc37 2022-10-23 stsp c = lgetc(0);
485 13b2bc37 2022-10-23 stsp while (c != '\n' && c != EOF)
486 13b2bc37 2022-10-23 stsp c = lgetc(0); /* nothing */
488 13b2bc37 2022-10-23 stsp if (c == '$' && parsebuf == NULL) {
489 13b2bc37 2022-10-23 stsp while (1) {
490 13b2bc37 2022-10-23 stsp c = lgetc(0);
491 13b2bc37 2022-10-23 stsp if (c == EOF)
492 13b2bc37 2022-10-23 stsp return (0);
494 13b2bc37 2022-10-23 stsp if (p + 1 >= buf + sizeof(buf) - 1) {
495 13b2bc37 2022-10-23 stsp yyerror("string too long");
496 13b2bc37 2022-10-23 stsp return (findeol());
498 13b2bc37 2022-10-23 stsp if (isalnum(c) || c == '_') {
503 13b2bc37 2022-10-23 stsp lungetc(c);
506 13b2bc37 2022-10-23 stsp val = symget(buf);
507 13b2bc37 2022-10-23 stsp if (val == NULL) {
508 13b2bc37 2022-10-23 stsp yyerror("macro '%s' not defined", buf);
509 13b2bc37 2022-10-23 stsp return (findeol());
511 13b2bc37 2022-10-23 stsp parsebuf = val;
512 13b2bc37 2022-10-23 stsp parseindex = 0;
516 13b2bc37 2022-10-23 stsp switch (c) {
519 13b2bc37 2022-10-23 stsp quotec = c;
520 13b2bc37 2022-10-23 stsp while (1) {
521 13b2bc37 2022-10-23 stsp c = lgetc(quotec);
522 13b2bc37 2022-10-23 stsp if (c == EOF)
523 13b2bc37 2022-10-23 stsp return (0);
524 13b2bc37 2022-10-23 stsp if (c == '\n') {
525 13b2bc37 2022-10-23 stsp file->lineno++;
527 13b2bc37 2022-10-23 stsp } else if (c == '\\') {
528 13b2bc37 2022-10-23 stsp next = lgetc(quotec);
529 13b2bc37 2022-10-23 stsp if (next == EOF)
530 13b2bc37 2022-10-23 stsp return (0);
531 13b2bc37 2022-10-23 stsp if (next == quotec || c == ' ' || c == '\t')
533 13b2bc37 2022-10-23 stsp else if (next == '\n') {
534 13b2bc37 2022-10-23 stsp file->lineno++;
537 13b2bc37 2022-10-23 stsp lungetc(next);
538 13b2bc37 2022-10-23 stsp } else if (c == quotec) {
541 13b2bc37 2022-10-23 stsp } else if (c == '\0') {
542 13b2bc37 2022-10-23 stsp yyerror("syntax error");
543 13b2bc37 2022-10-23 stsp return (findeol());
545 13b2bc37 2022-10-23 stsp if (p + 1 >= buf + sizeof(buf) - 1) {
546 13b2bc37 2022-10-23 stsp yyerror("string too long");
547 13b2bc37 2022-10-23 stsp return (findeol());
551 13b2bc37 2022-10-23 stsp yylval.v.string = strdup(buf);
552 13b2bc37 2022-10-23 stsp if (yylval.v.string == NULL)
553 13b2bc37 2022-10-23 stsp err(1, "yylex: strdup");
554 13b2bc37 2022-10-23 stsp return (STRING);
557 13b2bc37 2022-10-23 stsp #define allowed_to_end_number(x) \
558 13b2bc37 2022-10-23 stsp (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
560 13b2bc37 2022-10-23 stsp if (c == '-' || isdigit(c)) {
563 13b2bc37 2022-10-23 stsp if ((unsigned)(p-buf) >= sizeof(buf)) {
564 13b2bc37 2022-10-23 stsp yyerror("string too long");
565 13b2bc37 2022-10-23 stsp return (findeol());
567 13b2bc37 2022-10-23 stsp c = lgetc(0);
568 13b2bc37 2022-10-23 stsp } while (c != EOF && isdigit(c));
569 13b2bc37 2022-10-23 stsp lungetc(c);
570 13b2bc37 2022-10-23 stsp if (p == buf + 1 && buf[0] == '-')
571 13b2bc37 2022-10-23 stsp goto nodigits;
572 13b2bc37 2022-10-23 stsp if (c == EOF || allowed_to_end_number(c)) {
573 13b2bc37 2022-10-23 stsp const char *errstr = NULL;
576 13b2bc37 2022-10-23 stsp yylval.v.number = strtonum(buf, LLONG_MIN,
577 13b2bc37 2022-10-23 stsp LLONG_MAX, &errstr);
578 13b2bc37 2022-10-23 stsp if (errstr) {
579 13b2bc37 2022-10-23 stsp yyerror("\"%s\" invalid number: %s",
580 13b2bc37 2022-10-23 stsp buf, errstr);
581 13b2bc37 2022-10-23 stsp return (findeol());
583 13b2bc37 2022-10-23 stsp return (NUMBER);
586 13b2bc37 2022-10-23 stsp while (p > buf + 1)
587 13b2bc37 2022-10-23 stsp lungetc(*--p);
589 13b2bc37 2022-10-23 stsp if (c == '-')
590 13b2bc37 2022-10-23 stsp return (c);
594 13b2bc37 2022-10-23 stsp #define allowed_in_string(x) \
595 13b2bc37 2022-10-23 stsp (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
596 13b2bc37 2022-10-23 stsp x != '{' && x != '}' && \
597 13b2bc37 2022-10-23 stsp x != '!' && x != '=' && x != '#' && \
600 13b2bc37 2022-10-23 stsp if (isalnum(c) || c == ':' || c == '_') {
603 13b2bc37 2022-10-23 stsp if ((unsigned)(p-buf) >= sizeof(buf)) {
604 13b2bc37 2022-10-23 stsp yyerror("string too long");
605 13b2bc37 2022-10-23 stsp return (findeol());
607 13b2bc37 2022-10-23 stsp c = lgetc(0);
608 13b2bc37 2022-10-23 stsp } while (c != EOF && (allowed_in_string(c)));
609 13b2bc37 2022-10-23 stsp lungetc(c);
611 13b2bc37 2022-10-23 stsp token = lookup(buf);
612 13b2bc37 2022-10-23 stsp if (token == STRING) {
613 13b2bc37 2022-10-23 stsp yylval.v.string = strdup(buf);
614 13b2bc37 2022-10-23 stsp if (yylval.v.string == NULL)
615 13b2bc37 2022-10-23 stsp err(1, "yylex: strdup");
617 13b2bc37 2022-10-23 stsp return (token);
619 13b2bc37 2022-10-23 stsp if (c == '\n') {
620 13b2bc37 2022-10-23 stsp yylval.lineno = file->lineno;
621 13b2bc37 2022-10-23 stsp file->lineno++;
623 13b2bc37 2022-10-23 stsp if (c == EOF)
624 13b2bc37 2022-10-23 stsp return (0);
625 13b2bc37 2022-10-23 stsp return (c);
629 13b2bc37 2022-10-23 stsp check_file_secrecy(int fd, const char *fname)
631 13b2bc37 2022-10-23 stsp struct stat st;
633 13b2bc37 2022-10-23 stsp if (fstat(fd, &st)) {
634 13b2bc37 2022-10-23 stsp log_warn("cannot stat %s", fname);
635 13b2bc37 2022-10-23 stsp return (-1);
637 13b2bc37 2022-10-23 stsp if (st.st_uid != 0 && st.st_uid != getuid()) {
638 13b2bc37 2022-10-23 stsp log_warnx("%s: owner not root or current user", fname);
639 13b2bc37 2022-10-23 stsp return (-1);
641 13b2bc37 2022-10-23 stsp if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
642 13b2bc37 2022-10-23 stsp log_warnx("%s: group writable or world read/writable", fname);
643 13b2bc37 2022-10-23 stsp return (-1);
645 13b2bc37 2022-10-23 stsp return (0);
648 13b2bc37 2022-10-23 stsp struct file *
649 13b2bc37 2022-10-23 stsp newfile(const char *name, int secret)
651 13b2bc37 2022-10-23 stsp struct file *nfile;
653 13b2bc37 2022-10-23 stsp nfile = calloc(1, sizeof(struct file));
654 13b2bc37 2022-10-23 stsp if (nfile == NULL) {
655 13b2bc37 2022-10-23 stsp log_warn("calloc");
656 13b2bc37 2022-10-23 stsp return (NULL);
658 13b2bc37 2022-10-23 stsp nfile->name = strdup(name);
659 13b2bc37 2022-10-23 stsp if (nfile->name == NULL) {
660 13b2bc37 2022-10-23 stsp log_warn("strdup");
661 13b2bc37 2022-10-23 stsp free(nfile);
662 13b2bc37 2022-10-23 stsp return (NULL);
664 13b2bc37 2022-10-23 stsp nfile->stream = fopen(nfile->name, "r");
665 13b2bc37 2022-10-23 stsp if (nfile->stream == NULL) {
666 13b2bc37 2022-10-23 stsp /* no warning, we don't require a conf file */
667 13b2bc37 2022-10-23 stsp free(nfile->name);
668 13b2bc37 2022-10-23 stsp free(nfile);
669 13b2bc37 2022-10-23 stsp return (NULL);
670 13b2bc37 2022-10-23 stsp } else if (secret &&
671 13b2bc37 2022-10-23 stsp check_file_secrecy(fileno(nfile->stream), nfile->name)) {
672 13b2bc37 2022-10-23 stsp fclose(nfile->stream);
673 13b2bc37 2022-10-23 stsp free(nfile->name);
674 13b2bc37 2022-10-23 stsp free(nfile);
675 13b2bc37 2022-10-23 stsp return (NULL);
677 13b2bc37 2022-10-23 stsp nfile->lineno = 1;
678 13b2bc37 2022-10-23 stsp return (nfile);
681 13b2bc37 2022-10-23 stsp static void
682 13b2bc37 2022-10-23 stsp closefile(struct file *xfile)
684 13b2bc37 2022-10-23 stsp fclose(xfile->stream);
685 13b2bc37 2022-10-23 stsp free(xfile->name);
686 13b2bc37 2022-10-23 stsp free(xfile);
690 13b2bc37 2022-10-23 stsp parse_config(const char *filename, enum gotd_procid proc_id,
691 13b2bc37 2022-10-23 stsp struct gotd *env)
693 13b2bc37 2022-10-23 stsp struct sym *sym, *next;
694 3b706203 2023-01-02 stsp struct gotd_repo *repo;
696 13b2bc37 2022-10-23 stsp memset(env, 0, sizeof(*env));
698 13b2bc37 2022-10-23 stsp gotd = env;
699 13b2bc37 2022-10-23 stsp gotd_proc_id = proc_id;
700 13b2bc37 2022-10-23 stsp TAILQ_INIT(&gotd->repos);
702 13b2bc37 2022-10-23 stsp /* Apply default values. */
703 13b2bc37 2022-10-23 stsp if (strlcpy(gotd->unix_socket_path, GOTD_UNIX_SOCKET,
704 13b2bc37 2022-10-23 stsp sizeof(gotd->unix_socket_path)) >= sizeof(gotd->unix_socket_path)) {
705 13b2bc37 2022-10-23 stsp fprintf(stderr, "%s: unix socket path too long", __func__);
708 13b2bc37 2022-10-23 stsp if (strlcpy(gotd->user_name, GOTD_USER,
709 13b2bc37 2022-10-23 stsp sizeof(gotd->user_name)) >= sizeof(gotd->user_name)) {
710 13b2bc37 2022-10-23 stsp fprintf(stderr, "%s: user name too long", __func__);
714 40b85cca 2023-01-03 stsp gotd->request_timeout.tv_sec = GOTD_DEFAULT_REQUEST_TIMEOUT;
715 40b85cca 2023-01-03 stsp gotd->request_timeout.tv_usec = 0;
717 13b2bc37 2022-10-23 stsp file = newfile(filename, 0);
718 13b2bc37 2022-10-23 stsp if (file == NULL) {
719 13b2bc37 2022-10-23 stsp /* just return, as we don't require a conf file */
720 13b2bc37 2022-10-23 stsp return (0);
724 13b2bc37 2022-10-23 stsp errors = file->errors;
725 13b2bc37 2022-10-23 stsp closefile(file);
727 13b2bc37 2022-10-23 stsp /* Free macros and check which have not been used. */
728 13b2bc37 2022-10-23 stsp TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
729 13b2bc37 2022-10-23 stsp if ((gotd->verbosity > 1) && !sym->used)
730 13b2bc37 2022-10-23 stsp fprintf(stderr, "warning: macro '%s' not used\n",
732 13b2bc37 2022-10-23 stsp if (!sym->persist) {
733 13b2bc37 2022-10-23 stsp free(sym->nam);
734 13b2bc37 2022-10-23 stsp free(sym->val);
735 13b2bc37 2022-10-23 stsp TAILQ_REMOVE(&symhead, sym, entry);
740 13b2bc37 2022-10-23 stsp if (errors)
741 13b2bc37 2022-10-23 stsp return (-1);
743 3b706203 2023-01-02 stsp TAILQ_FOREACH(repo, &gotd->repos, entry) {
744 3b706203 2023-01-02 stsp if (repo->path[0] == '\0') {
745 2507ffb7 2023-01-02 stsp log_warnx("repository \"%s\": no path provided in "
746 2507ffb7 2023-01-02 stsp "configuration file", repo->name);
747 3b706203 2023-01-02 stsp return (-1);
751 809a54db 2023-01-18 op if (proc_id == PROC_GOTD && TAILQ_EMPTY(&gotd->repos)) {
752 809a54db 2023-01-18 op log_warnx("no repository defined in configuration file");
756 13b2bc37 2022-10-23 stsp return (0);
760 40b85cca 2023-01-03 stsp uid_connection_limit_cmp(const void *pa, const void *pb)
762 40b85cca 2023-01-03 stsp const struct gotd_uid_connection_limit *a = pa, *b = pb;
764 40b85cca 2023-01-03 stsp if (a->uid < b->uid)
766 40b85cca 2023-01-03 stsp else if (a->uid > b->uid);
773 40b85cca 2023-01-03 stsp conf_limit_user_connections(const char *user, int maximum)
776 40b85cca 2023-01-03 stsp struct gotd_uid_connection_limit *limit;
777 40b85cca 2023-01-03 stsp size_t nlimits;
779 40b85cca 2023-01-03 stsp if (maximum < 1) {
780 40b85cca 2023-01-03 stsp yyerror("max connections cannot be smaller 1");
783 40b85cca 2023-01-03 stsp if (maximum > GOTD_MAXCLIENTS) {
784 40b85cca 2023-01-03 stsp yyerror("max connections must be <= %d", GOTD_MAXCLIENTS);
788 40b85cca 2023-01-03 stsp if (gotd_auth_parseuid(user, &uid) == -1) {
789 40b85cca 2023-01-03 stsp yyerror("%s: no such user", user);
793 40b85cca 2023-01-03 stsp limit = gotd_find_uid_connection_limit(gotd->connection_limits,
794 40b85cca 2023-01-03 stsp gotd->nconnection_limits, uid);
795 40b85cca 2023-01-03 stsp if (limit) {
796 40b85cca 2023-01-03 stsp limit->max_connections = maximum;
800 40b85cca 2023-01-03 stsp limit = gotd->connection_limits;
801 40b85cca 2023-01-03 stsp nlimits = gotd->nconnection_limits + 1;
802 40b85cca 2023-01-03 stsp limit = reallocarray(limit, nlimits, sizeof(*limit));
803 40b85cca 2023-01-03 stsp if (limit == NULL)
804 40b85cca 2023-01-03 stsp fatal("reallocarray");
806 40b85cca 2023-01-03 stsp limit[nlimits - 1].uid = uid;
807 40b85cca 2023-01-03 stsp limit[nlimits - 1].max_connections = maximum;
809 40b85cca 2023-01-03 stsp gotd->connection_limits = limit;
810 40b85cca 2023-01-03 stsp gotd->nconnection_limits = nlimits;
811 40b85cca 2023-01-03 stsp qsort(gotd->connection_limits, gotd->nconnection_limits,
812 40b85cca 2023-01-03 stsp sizeof(gotd->connection_limits[0]), uid_connection_limit_cmp);
817 13b2bc37 2022-10-23 stsp static struct gotd_repo *
818 13b2bc37 2022-10-23 stsp conf_new_repo(const char *name)
820 13b2bc37 2022-10-23 stsp struct gotd_repo *repo;
822 7683f79a 2023-01-02 stsp if (name[0] == '\0') {
823 7683f79a 2023-01-02 stsp fatalx("syntax error: empty repository name found in %s",
824 7683f79a 2023-01-02 stsp file->name);
827 2507ffb7 2023-01-02 stsp if (strchr(name, '\n') != NULL)
828 2507ffb7 2023-01-02 stsp fatalx("repository names must not contain linefeeds: %s", name);
830 13b2bc37 2022-10-23 stsp repo = calloc(1, sizeof(*repo));
831 13b2bc37 2022-10-23 stsp if (repo == NULL)
832 13b2bc37 2022-10-23 stsp fatalx("%s: calloc", __func__);
834 0ccf3acb 2022-11-16 stsp STAILQ_INIT(&repo->rules);
836 13b2bc37 2022-10-23 stsp if (strlcpy(repo->name, name, sizeof(repo->name)) >=
837 13b2bc37 2022-10-23 stsp sizeof(repo->name))
838 13b2bc37 2022-10-23 stsp fatalx("%s: strlcpy", __func__);
840 13b2bc37 2022-10-23 stsp TAILQ_INSERT_TAIL(&gotd->repos, repo, entry);
841 13b2bc37 2022-10-23 stsp gotd->nrepos++;
843 13b2bc37 2022-10-23 stsp return repo;
846 0ccf3acb 2022-11-16 stsp static void
847 0ccf3acb 2022-11-16 stsp conf_new_access_rule(struct gotd_repo *repo, enum gotd_access access,
848 0ccf3acb 2022-11-16 stsp int authorization, char *identifier)
850 0ccf3acb 2022-11-16 stsp struct gotd_access_rule *rule;
852 0ccf3acb 2022-11-16 stsp rule = calloc(1, sizeof(*rule));
853 0ccf3acb 2022-11-16 stsp if (rule == NULL)
854 0ccf3acb 2022-11-16 stsp fatal("calloc");
856 0ccf3acb 2022-11-16 stsp rule->access = access;
857 0ccf3acb 2022-11-16 stsp rule->authorization = authorization;
858 0ccf3acb 2022-11-16 stsp rule->identifier = identifier;
860 0ccf3acb 2022-11-16 stsp STAILQ_INSERT_TAIL(&repo->rules, rule, entry);
864 13b2bc37 2022-10-23 stsp symset(const char *nam, const char *val, int persist)
866 13b2bc37 2022-10-23 stsp struct sym *sym;
868 13b2bc37 2022-10-23 stsp TAILQ_FOREACH(sym, &symhead, entry) {
869 13b2bc37 2022-10-23 stsp if (strcmp(nam, sym->nam) == 0)
873 13b2bc37 2022-10-23 stsp if (sym != NULL) {
874 13b2bc37 2022-10-23 stsp if (sym->persist == 1)
875 13b2bc37 2022-10-23 stsp return (0);
877 13b2bc37 2022-10-23 stsp free(sym->nam);
878 13b2bc37 2022-10-23 stsp free(sym->val);
879 13b2bc37 2022-10-23 stsp TAILQ_REMOVE(&symhead, sym, entry);
883 13b2bc37 2022-10-23 stsp sym = calloc(1, sizeof(*sym));
884 13b2bc37 2022-10-23 stsp if (sym == NULL)
885 13b2bc37 2022-10-23 stsp return (-1);
887 13b2bc37 2022-10-23 stsp sym->nam = strdup(nam);
888 13b2bc37 2022-10-23 stsp if (sym->nam == NULL) {
890 13b2bc37 2022-10-23 stsp return (-1);
892 13b2bc37 2022-10-23 stsp sym->val = strdup(val);
893 13b2bc37 2022-10-23 stsp if (sym->val == NULL) {
894 13b2bc37 2022-10-23 stsp free(sym->nam);
896 13b2bc37 2022-10-23 stsp return (-1);
898 13b2bc37 2022-10-23 stsp sym->used = 0;
899 13b2bc37 2022-10-23 stsp sym->persist = persist;
900 13b2bc37 2022-10-23 stsp TAILQ_INSERT_TAIL(&symhead, sym, entry);
901 13b2bc37 2022-10-23 stsp return (0);
905 13b2bc37 2022-10-23 stsp symget(const char *nam)
907 13b2bc37 2022-10-23 stsp struct sym *sym;
909 13b2bc37 2022-10-23 stsp TAILQ_FOREACH(sym, &symhead, entry) {
910 13b2bc37 2022-10-23 stsp if (strcmp(nam, sym->nam) == 0) {
911 13b2bc37 2022-10-23 stsp sym->used = 1;
912 13b2bc37 2022-10-23 stsp return (sym->val);
915 13b2bc37 2022-10-23 stsp return (NULL);