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 d93ecf7d 2022-12-14 stsp if (gotd_proc_id == PROC_LISTEN) {
199 83577462 2023-01-05 stsp if (strlcpy(gotd->unix_socket_path, $3,
200 13b2bc37 2022-10-23 stsp sizeof(gotd->unix_socket_path)) >=
201 13b2bc37 2022-10-23 stsp sizeof(gotd->unix_socket_path)) {
202 13b2bc37 2022-10-23 stsp yyerror("%s: unix socket path too long",
210 13b2bc37 2022-10-23 stsp | USER STRING {
211 13b2bc37 2022-10-23 stsp if (strlcpy(gotd->user_name, $2,
212 13b2bc37 2022-10-23 stsp sizeof(gotd->user_name)) >=
213 13b2bc37 2022-10-23 stsp sizeof(gotd->user_name)) {
214 13b2bc37 2022-10-23 stsp yyerror("%s: user name too long", __func__);
220 40b85cca 2023-01-03 stsp | connection
223 40b85cca 2023-01-03 stsp connection : CONNECTION '{' optnl conflags_l '}'
224 40b85cca 2023-01-03 stsp | CONNECTION conflags
226 40b85cca 2023-01-03 stsp conflags_l : conflags optnl conflags_l
227 40b85cca 2023-01-03 stsp | conflags optnl
230 40b85cca 2023-01-03 stsp conflags : REQUEST TIMEOUT timeout {
231 46e48ac7 2023-01-03 stsp if ($3.tv_sec <= 0) {
232 46e48ac7 2023-01-03 stsp yyerror("invalid timeout: %lld", $3.tv_sec);
235 40b85cca 2023-01-03 stsp memcpy(&gotd->request_timeout, &$3,
236 40b85cca 2023-01-03 stsp sizeof(gotd->request_timeout));
238 40b85cca 2023-01-03 stsp | LIMIT USER STRING NUMBER {
239 40b85cca 2023-01-03 stsp if (gotd_proc_id == PROC_LISTEN &&
240 40b85cca 2023-01-03 stsp conf_limit_user_connections($3, $4) == -1) {
248 13b2bc37 2022-10-23 stsp repository : REPOSITORY STRING {
249 13b2bc37 2022-10-23 stsp struct gotd_repo *repo;
251 13b2bc37 2022-10-23 stsp TAILQ_FOREACH(repo, &gotd->repos, entry) {
252 13b2bc37 2022-10-23 stsp if (strcmp(repo->name, $2) == 0) {
253 13b2bc37 2022-10-23 stsp yyerror("duplicate repository '%s'", $2);
259 5e25db14 2022-12-29 stsp if (gotd_proc_id == PROC_GOTD ||
260 5e25db14 2022-12-29 stsp gotd_proc_id == PROC_AUTH) {
261 13b2bc37 2022-10-23 stsp new_repo = conf_new_repo($2);
264 13b2bc37 2022-10-23 stsp } '{' optnl repoopts2 '}' {
268 13b2bc37 2022-10-23 stsp repoopts1 : PATH STRING {
269 5e25db14 2022-12-29 stsp if (gotd_proc_id == PROC_GOTD ||
270 5e25db14 2022-12-29 stsp gotd_proc_id == PROC_AUTH) {
271 13b2bc37 2022-10-23 stsp if (!got_path_is_absolute($2)) {
272 13b2bc37 2022-10-23 stsp yyerror("%s: path %s is not absolute",
273 13b2bc37 2022-10-23 stsp __func__, $2);
277 9b7f22a6 2023-01-08 stsp if (realpath($2, new_repo->path) == NULL) {
278 9b7f22a6 2023-01-08 stsp yyerror("realpath %s: %s", $2, strerror(errno));
285 0ccf3acb 2022-11-16 stsp | PERMIT RO STRING {
286 5e25db14 2022-12-29 stsp if (gotd_proc_id == PROC_AUTH) {
287 0ccf3acb 2022-11-16 stsp conf_new_access_rule(new_repo,
288 0ccf3acb 2022-11-16 stsp GOTD_ACCESS_PERMITTED, GOTD_AUTH_READ, $3);
291 0ccf3acb 2022-11-16 stsp | PERMIT RW STRING {
292 5e25db14 2022-12-29 stsp if (gotd_proc_id == PROC_AUTH) {
293 0ccf3acb 2022-11-16 stsp conf_new_access_rule(new_repo,
294 0ccf3acb 2022-11-16 stsp GOTD_ACCESS_PERMITTED,
295 0ccf3acb 2022-11-16 stsp GOTD_AUTH_READ | GOTD_AUTH_WRITE, $3);
298 0ccf3acb 2022-11-16 stsp | DENY STRING {
299 5e25db14 2022-12-29 stsp if (gotd_proc_id == PROC_AUTH) {
300 0ccf3acb 2022-11-16 stsp conf_new_access_rule(new_repo,
301 0ccf3acb 2022-11-16 stsp GOTD_ACCESS_DENIED, 0, $2);
306 13b2bc37 2022-10-23 stsp repoopts2 : repoopts2 repoopts1 nl
307 13b2bc37 2022-10-23 stsp | repoopts1 optnl
310 13b2bc37 2022-10-23 stsp nl : '\n' optnl
313 13b2bc37 2022-10-23 stsp optnl : '\n' optnl /* zero or more newlines */
314 13b2bc37 2022-10-23 stsp | /* empty */
319 13b2bc37 2022-10-23 stsp struct keywords {
320 13b2bc37 2022-10-23 stsp const char *k_name;
325 13b2bc37 2022-10-23 stsp yyerror(const char *fmt, ...)
327 13b2bc37 2022-10-23 stsp va_list ap;
330 13b2bc37 2022-10-23 stsp file->errors++;
331 13b2bc37 2022-10-23 stsp va_start(ap, fmt);
332 13b2bc37 2022-10-23 stsp if (vasprintf(&msg, fmt, ap) == -1)
333 13b2bc37 2022-10-23 stsp fatalx("yyerror vasprintf");
334 13b2bc37 2022-10-23 stsp va_end(ap);
335 13b2bc37 2022-10-23 stsp logit(LOG_CRIT, "%s:%d: %s", file->name, yylval.lineno, msg);
337 13b2bc37 2022-10-23 stsp return (0);
341 13b2bc37 2022-10-23 stsp kw_cmp(const void *k, const void *e)
343 13b2bc37 2022-10-23 stsp return (strcmp(k, ((const struct keywords *)e)->k_name));
347 13b2bc37 2022-10-23 stsp lookup(char *s)
349 13b2bc37 2022-10-23 stsp /* This has to be sorted always. */
350 13b2bc37 2022-10-23 stsp static const struct keywords keywords[] = {
351 40b85cca 2023-01-03 stsp { "connection", CONNECTION },
352 0ccf3acb 2022-11-16 stsp { "deny", DENY },
353 40b85cca 2023-01-03 stsp { "limit", LIMIT },
354 83577462 2023-01-05 stsp { "listen", LISTEN },
355 13b2bc37 2022-10-23 stsp { "on", ON },
356 13b2bc37 2022-10-23 stsp { "path", PATH },
357 0ccf3acb 2022-11-16 stsp { "permit", PERMIT },
358 13b2bc37 2022-10-23 stsp { "repository", REPOSITORY },
359 40b85cca 2023-01-03 stsp { "request", REQUEST },
360 0ccf3acb 2022-11-16 stsp { "ro", RO },
361 0ccf3acb 2022-11-16 stsp { "rw", RW },
362 40b85cca 2023-01-03 stsp { "timeout", TIMEOUT },
363 13b2bc37 2022-10-23 stsp { "user", USER },
365 13b2bc37 2022-10-23 stsp const struct keywords *p;
367 13b2bc37 2022-10-23 stsp p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
368 13b2bc37 2022-10-23 stsp sizeof(keywords[0]), kw_cmp);
371 13b2bc37 2022-10-23 stsp return (p->k_val);
373 13b2bc37 2022-10-23 stsp return (STRING);
376 13b2bc37 2022-10-23 stsp #define MAXPUSHBACK 128
378 13b2bc37 2022-10-23 stsp unsigned char *parsebuf;
379 13b2bc37 2022-10-23 stsp int parseindex;
380 13b2bc37 2022-10-23 stsp unsigned char pushback_buffer[MAXPUSHBACK];
381 13b2bc37 2022-10-23 stsp int pushback_index = 0;
384 13b2bc37 2022-10-23 stsp lgetc(int quotec)
386 13b2bc37 2022-10-23 stsp int c, next;
388 13b2bc37 2022-10-23 stsp if (parsebuf) {
389 13b2bc37 2022-10-23 stsp /* Read character from the parsebuffer instead of input. */
390 13b2bc37 2022-10-23 stsp if (parseindex >= 0) {
391 13b2bc37 2022-10-23 stsp c = parsebuf[parseindex++];
392 13b2bc37 2022-10-23 stsp if (c != '\0')
393 13b2bc37 2022-10-23 stsp return (c);
394 13b2bc37 2022-10-23 stsp parsebuf = NULL;
396 13b2bc37 2022-10-23 stsp parseindex++;
399 13b2bc37 2022-10-23 stsp if (pushback_index)
400 13b2bc37 2022-10-23 stsp return (pushback_buffer[--pushback_index]);
402 13b2bc37 2022-10-23 stsp if (quotec) {
403 13b2bc37 2022-10-23 stsp c = getc(file->stream);
404 13b2bc37 2022-10-23 stsp if (c == EOF)
405 13b2bc37 2022-10-23 stsp yyerror("reached end of file while parsing "
406 13b2bc37 2022-10-23 stsp "quoted string");
407 13b2bc37 2022-10-23 stsp return (c);
410 13b2bc37 2022-10-23 stsp c = getc(file->stream);
411 13b2bc37 2022-10-23 stsp while (c == '\\') {
412 13b2bc37 2022-10-23 stsp next = getc(file->stream);
413 13b2bc37 2022-10-23 stsp if (next != '\n') {
417 13b2bc37 2022-10-23 stsp yylval.lineno = file->lineno;
418 13b2bc37 2022-10-23 stsp file->lineno++;
419 13b2bc37 2022-10-23 stsp c = getc(file->stream);
422 13b2bc37 2022-10-23 stsp return (c);
426 13b2bc37 2022-10-23 stsp lungetc(int c)
428 13b2bc37 2022-10-23 stsp if (c == EOF)
429 13b2bc37 2022-10-23 stsp return (EOF);
430 13b2bc37 2022-10-23 stsp if (parsebuf) {
431 13b2bc37 2022-10-23 stsp parseindex--;
432 13b2bc37 2022-10-23 stsp if (parseindex >= 0)
433 13b2bc37 2022-10-23 stsp return (c);
435 13b2bc37 2022-10-23 stsp if (pushback_index < MAXPUSHBACK-1)
436 13b2bc37 2022-10-23 stsp return (pushback_buffer[pushback_index++] = c);
438 13b2bc37 2022-10-23 stsp return (EOF);
442 13b2bc37 2022-10-23 stsp findeol(void)
446 13b2bc37 2022-10-23 stsp parsebuf = NULL;
448 13b2bc37 2022-10-23 stsp /* Skip to either EOF or the first real EOL. */
449 13b2bc37 2022-10-23 stsp while (1) {
450 13b2bc37 2022-10-23 stsp if (pushback_index)
451 13b2bc37 2022-10-23 stsp c = pushback_buffer[--pushback_index];
453 13b2bc37 2022-10-23 stsp c = lgetc(0);
454 13b2bc37 2022-10-23 stsp if (c == '\n') {
455 13b2bc37 2022-10-23 stsp file->lineno++;
458 13b2bc37 2022-10-23 stsp if (c == EOF)
461 13b2bc37 2022-10-23 stsp return (ERROR);
465 13b2bc37 2022-10-23 stsp yylex(void)
467 13b2bc37 2022-10-23 stsp unsigned char buf[8096];
468 13b2bc37 2022-10-23 stsp unsigned char *p, *val;
469 13b2bc37 2022-10-23 stsp int quotec, next, c;
474 13b2bc37 2022-10-23 stsp c = lgetc(0);
475 13b2bc37 2022-10-23 stsp while (c == ' ' || c == '\t')
476 13b2bc37 2022-10-23 stsp c = lgetc(0); /* nothing */
478 13b2bc37 2022-10-23 stsp yylval.lineno = file->lineno;
479 13b2bc37 2022-10-23 stsp if (c == '#') {
480 13b2bc37 2022-10-23 stsp c = lgetc(0);
481 13b2bc37 2022-10-23 stsp while (c != '\n' && c != EOF)
482 13b2bc37 2022-10-23 stsp c = lgetc(0); /* nothing */
484 13b2bc37 2022-10-23 stsp if (c == '$' && parsebuf == NULL) {
485 13b2bc37 2022-10-23 stsp while (1) {
486 13b2bc37 2022-10-23 stsp c = lgetc(0);
487 13b2bc37 2022-10-23 stsp if (c == EOF)
488 13b2bc37 2022-10-23 stsp return (0);
490 13b2bc37 2022-10-23 stsp if (p + 1 >= buf + sizeof(buf) - 1) {
491 13b2bc37 2022-10-23 stsp yyerror("string too long");
492 13b2bc37 2022-10-23 stsp return (findeol());
494 13b2bc37 2022-10-23 stsp if (isalnum(c) || c == '_') {
499 13b2bc37 2022-10-23 stsp lungetc(c);
502 13b2bc37 2022-10-23 stsp val = symget(buf);
503 13b2bc37 2022-10-23 stsp if (val == NULL) {
504 13b2bc37 2022-10-23 stsp yyerror("macro '%s' not defined", buf);
505 13b2bc37 2022-10-23 stsp return (findeol());
507 13b2bc37 2022-10-23 stsp parsebuf = val;
508 13b2bc37 2022-10-23 stsp parseindex = 0;
512 13b2bc37 2022-10-23 stsp switch (c) {
515 13b2bc37 2022-10-23 stsp quotec = c;
516 13b2bc37 2022-10-23 stsp while (1) {
517 13b2bc37 2022-10-23 stsp c = lgetc(quotec);
518 13b2bc37 2022-10-23 stsp if (c == EOF)
519 13b2bc37 2022-10-23 stsp return (0);
520 13b2bc37 2022-10-23 stsp if (c == '\n') {
521 13b2bc37 2022-10-23 stsp file->lineno++;
523 13b2bc37 2022-10-23 stsp } else if (c == '\\') {
524 13b2bc37 2022-10-23 stsp next = lgetc(quotec);
525 13b2bc37 2022-10-23 stsp if (next == EOF)
526 13b2bc37 2022-10-23 stsp return (0);
527 13b2bc37 2022-10-23 stsp if (next == quotec || c == ' ' || c == '\t')
529 13b2bc37 2022-10-23 stsp else if (next == '\n') {
530 13b2bc37 2022-10-23 stsp file->lineno++;
533 13b2bc37 2022-10-23 stsp lungetc(next);
534 13b2bc37 2022-10-23 stsp } else if (c == quotec) {
537 13b2bc37 2022-10-23 stsp } else if (c == '\0') {
538 13b2bc37 2022-10-23 stsp yyerror("syntax error");
539 13b2bc37 2022-10-23 stsp return (findeol());
541 13b2bc37 2022-10-23 stsp if (p + 1 >= buf + sizeof(buf) - 1) {
542 13b2bc37 2022-10-23 stsp yyerror("string too long");
543 13b2bc37 2022-10-23 stsp return (findeol());
547 13b2bc37 2022-10-23 stsp yylval.v.string = strdup(buf);
548 13b2bc37 2022-10-23 stsp if (yylval.v.string == NULL)
549 13b2bc37 2022-10-23 stsp err(1, "yylex: strdup");
550 13b2bc37 2022-10-23 stsp return (STRING);
553 13b2bc37 2022-10-23 stsp #define allowed_to_end_number(x) \
554 13b2bc37 2022-10-23 stsp (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
556 13b2bc37 2022-10-23 stsp if (c == '-' || isdigit(c)) {
559 13b2bc37 2022-10-23 stsp if ((unsigned)(p-buf) >= sizeof(buf)) {
560 13b2bc37 2022-10-23 stsp yyerror("string too long");
561 13b2bc37 2022-10-23 stsp return (findeol());
563 13b2bc37 2022-10-23 stsp c = lgetc(0);
564 13b2bc37 2022-10-23 stsp } while (c != EOF && isdigit(c));
565 13b2bc37 2022-10-23 stsp lungetc(c);
566 13b2bc37 2022-10-23 stsp if (p == buf + 1 && buf[0] == '-')
567 13b2bc37 2022-10-23 stsp goto nodigits;
568 13b2bc37 2022-10-23 stsp if (c == EOF || allowed_to_end_number(c)) {
569 13b2bc37 2022-10-23 stsp const char *errstr = NULL;
572 13b2bc37 2022-10-23 stsp yylval.v.number = strtonum(buf, LLONG_MIN,
573 13b2bc37 2022-10-23 stsp LLONG_MAX, &errstr);
574 13b2bc37 2022-10-23 stsp if (errstr) {
575 13b2bc37 2022-10-23 stsp yyerror("\"%s\" invalid number: %s",
576 13b2bc37 2022-10-23 stsp buf, errstr);
577 13b2bc37 2022-10-23 stsp return (findeol());
579 13b2bc37 2022-10-23 stsp return (NUMBER);
582 13b2bc37 2022-10-23 stsp while (p > buf + 1)
583 13b2bc37 2022-10-23 stsp lungetc(*--p);
585 13b2bc37 2022-10-23 stsp if (c == '-')
586 13b2bc37 2022-10-23 stsp return (c);
590 13b2bc37 2022-10-23 stsp #define allowed_in_string(x) \
591 13b2bc37 2022-10-23 stsp (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
592 13b2bc37 2022-10-23 stsp x != '{' && x != '}' && \
593 13b2bc37 2022-10-23 stsp x != '!' && x != '=' && x != '#' && \
596 13b2bc37 2022-10-23 stsp if (isalnum(c) || c == ':' || c == '_') {
599 13b2bc37 2022-10-23 stsp if ((unsigned)(p-buf) >= sizeof(buf)) {
600 13b2bc37 2022-10-23 stsp yyerror("string too long");
601 13b2bc37 2022-10-23 stsp return (findeol());
603 13b2bc37 2022-10-23 stsp c = lgetc(0);
604 13b2bc37 2022-10-23 stsp } while (c != EOF && (allowed_in_string(c)));
605 13b2bc37 2022-10-23 stsp lungetc(c);
607 13b2bc37 2022-10-23 stsp token = lookup(buf);
608 13b2bc37 2022-10-23 stsp if (token == STRING) {
609 13b2bc37 2022-10-23 stsp yylval.v.string = strdup(buf);
610 13b2bc37 2022-10-23 stsp if (yylval.v.string == NULL)
611 13b2bc37 2022-10-23 stsp err(1, "yylex: strdup");
613 13b2bc37 2022-10-23 stsp return (token);
615 13b2bc37 2022-10-23 stsp if (c == '\n') {
616 13b2bc37 2022-10-23 stsp yylval.lineno = file->lineno;
617 13b2bc37 2022-10-23 stsp file->lineno++;
619 13b2bc37 2022-10-23 stsp if (c == EOF)
620 13b2bc37 2022-10-23 stsp return (0);
621 13b2bc37 2022-10-23 stsp return (c);
625 13b2bc37 2022-10-23 stsp check_file_secrecy(int fd, const char *fname)
627 13b2bc37 2022-10-23 stsp struct stat st;
629 13b2bc37 2022-10-23 stsp if (fstat(fd, &st)) {
630 13b2bc37 2022-10-23 stsp log_warn("cannot stat %s", fname);
631 13b2bc37 2022-10-23 stsp return (-1);
633 13b2bc37 2022-10-23 stsp if (st.st_uid != 0 && st.st_uid != getuid()) {
634 13b2bc37 2022-10-23 stsp log_warnx("%s: owner not root or current user", fname);
635 13b2bc37 2022-10-23 stsp return (-1);
637 13b2bc37 2022-10-23 stsp if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
638 13b2bc37 2022-10-23 stsp log_warnx("%s: group writable or world read/writable", fname);
639 13b2bc37 2022-10-23 stsp return (-1);
641 13b2bc37 2022-10-23 stsp return (0);
644 13b2bc37 2022-10-23 stsp struct file *
645 13b2bc37 2022-10-23 stsp newfile(const char *name, int secret)
647 13b2bc37 2022-10-23 stsp struct file *nfile;
649 13b2bc37 2022-10-23 stsp nfile = calloc(1, sizeof(struct file));
650 13b2bc37 2022-10-23 stsp if (nfile == NULL) {
651 13b2bc37 2022-10-23 stsp log_warn("calloc");
652 13b2bc37 2022-10-23 stsp return (NULL);
654 13b2bc37 2022-10-23 stsp nfile->name = strdup(name);
655 13b2bc37 2022-10-23 stsp if (nfile->name == NULL) {
656 13b2bc37 2022-10-23 stsp log_warn("strdup");
657 13b2bc37 2022-10-23 stsp free(nfile);
658 13b2bc37 2022-10-23 stsp return (NULL);
660 13b2bc37 2022-10-23 stsp nfile->stream = fopen(nfile->name, "r");
661 13b2bc37 2022-10-23 stsp if (nfile->stream == NULL) {
662 13b2bc37 2022-10-23 stsp /* no warning, we don't require a conf file */
663 13b2bc37 2022-10-23 stsp free(nfile->name);
664 13b2bc37 2022-10-23 stsp free(nfile);
665 13b2bc37 2022-10-23 stsp return (NULL);
666 13b2bc37 2022-10-23 stsp } else if (secret &&
667 13b2bc37 2022-10-23 stsp check_file_secrecy(fileno(nfile->stream), nfile->name)) {
668 13b2bc37 2022-10-23 stsp fclose(nfile->stream);
669 13b2bc37 2022-10-23 stsp free(nfile->name);
670 13b2bc37 2022-10-23 stsp free(nfile);
671 13b2bc37 2022-10-23 stsp return (NULL);
673 13b2bc37 2022-10-23 stsp nfile->lineno = 1;
674 13b2bc37 2022-10-23 stsp return (nfile);
677 13b2bc37 2022-10-23 stsp static void
678 13b2bc37 2022-10-23 stsp closefile(struct file *xfile)
680 13b2bc37 2022-10-23 stsp fclose(xfile->stream);
681 13b2bc37 2022-10-23 stsp free(xfile->name);
682 13b2bc37 2022-10-23 stsp free(xfile);
686 13b2bc37 2022-10-23 stsp parse_config(const char *filename, enum gotd_procid proc_id,
687 13b2bc37 2022-10-23 stsp struct gotd *env)
689 13b2bc37 2022-10-23 stsp struct sym *sym, *next;
690 3b706203 2023-01-02 stsp struct gotd_repo *repo;
692 13b2bc37 2022-10-23 stsp memset(env, 0, sizeof(*env));
694 13b2bc37 2022-10-23 stsp gotd = env;
695 13b2bc37 2022-10-23 stsp gotd_proc_id = proc_id;
696 13b2bc37 2022-10-23 stsp TAILQ_INIT(&gotd->repos);
698 13b2bc37 2022-10-23 stsp /* Apply default values. */
699 13b2bc37 2022-10-23 stsp if (strlcpy(gotd->unix_socket_path, GOTD_UNIX_SOCKET,
700 13b2bc37 2022-10-23 stsp sizeof(gotd->unix_socket_path)) >= sizeof(gotd->unix_socket_path)) {
701 13b2bc37 2022-10-23 stsp fprintf(stderr, "%s: unix socket path too long", __func__);
704 13b2bc37 2022-10-23 stsp if (strlcpy(gotd->user_name, GOTD_USER,
705 13b2bc37 2022-10-23 stsp sizeof(gotd->user_name)) >= sizeof(gotd->user_name)) {
706 13b2bc37 2022-10-23 stsp fprintf(stderr, "%s: user name too long", __func__);
710 40b85cca 2023-01-03 stsp gotd->request_timeout.tv_sec = GOTD_DEFAULT_REQUEST_TIMEOUT;
711 40b85cca 2023-01-03 stsp gotd->request_timeout.tv_usec = 0;
713 13b2bc37 2022-10-23 stsp file = newfile(filename, 0);
714 13b2bc37 2022-10-23 stsp if (file == NULL) {
715 13b2bc37 2022-10-23 stsp /* just return, as we don't require a conf file */
716 13b2bc37 2022-10-23 stsp return (0);
720 13b2bc37 2022-10-23 stsp errors = file->errors;
721 13b2bc37 2022-10-23 stsp closefile(file);
723 13b2bc37 2022-10-23 stsp /* Free macros and check which have not been used. */
724 13b2bc37 2022-10-23 stsp TAILQ_FOREACH_SAFE(sym, &symhead, entry, next) {
725 13b2bc37 2022-10-23 stsp if ((gotd->verbosity > 1) && !sym->used)
726 13b2bc37 2022-10-23 stsp fprintf(stderr, "warning: macro '%s' not used\n",
728 13b2bc37 2022-10-23 stsp if (!sym->persist) {
729 13b2bc37 2022-10-23 stsp free(sym->nam);
730 13b2bc37 2022-10-23 stsp free(sym->val);
731 13b2bc37 2022-10-23 stsp TAILQ_REMOVE(&symhead, sym, entry);
736 13b2bc37 2022-10-23 stsp if (errors)
737 13b2bc37 2022-10-23 stsp return (-1);
739 3b706203 2023-01-02 stsp TAILQ_FOREACH(repo, &gotd->repos, entry) {
740 3b706203 2023-01-02 stsp if (repo->path[0] == '\0') {
741 2507ffb7 2023-01-02 stsp log_warnx("repository \"%s\": no path provided in "
742 2507ffb7 2023-01-02 stsp "configuration file", repo->name);
743 3b706203 2023-01-02 stsp return (-1);
747 13b2bc37 2022-10-23 stsp return (0);
751 40b85cca 2023-01-03 stsp uid_connection_limit_cmp(const void *pa, const void *pb)
753 40b85cca 2023-01-03 stsp const struct gotd_uid_connection_limit *a = pa, *b = pb;
755 40b85cca 2023-01-03 stsp if (a->uid < b->uid)
757 40b85cca 2023-01-03 stsp else if (a->uid > b->uid);
764 40b85cca 2023-01-03 stsp conf_limit_user_connections(const char *user, int maximum)
767 40b85cca 2023-01-03 stsp struct gotd_uid_connection_limit *limit;
768 40b85cca 2023-01-03 stsp size_t nlimits;
770 40b85cca 2023-01-03 stsp if (maximum < 1) {
771 40b85cca 2023-01-03 stsp yyerror("max connections cannot be smaller 1");
774 40b85cca 2023-01-03 stsp if (maximum > GOTD_MAXCLIENTS) {
775 40b85cca 2023-01-03 stsp yyerror("max connections must be <= %d", GOTD_MAXCLIENTS);
779 40b85cca 2023-01-03 stsp if (gotd_auth_parseuid(user, &uid) == -1) {
780 40b85cca 2023-01-03 stsp yyerror("%s: no such user", user);
784 40b85cca 2023-01-03 stsp limit = gotd_find_uid_connection_limit(gotd->connection_limits,
785 40b85cca 2023-01-03 stsp gotd->nconnection_limits, uid);
786 40b85cca 2023-01-03 stsp if (limit) {
787 40b85cca 2023-01-03 stsp limit->max_connections = maximum;
791 40b85cca 2023-01-03 stsp limit = gotd->connection_limits;
792 40b85cca 2023-01-03 stsp nlimits = gotd->nconnection_limits + 1;
793 40b85cca 2023-01-03 stsp limit = reallocarray(limit, nlimits, sizeof(*limit));
794 40b85cca 2023-01-03 stsp if (limit == NULL)
795 40b85cca 2023-01-03 stsp fatal("reallocarray");
797 40b85cca 2023-01-03 stsp limit[nlimits - 1].uid = uid;
798 40b85cca 2023-01-03 stsp limit[nlimits - 1].max_connections = maximum;
800 40b85cca 2023-01-03 stsp gotd->connection_limits = limit;
801 40b85cca 2023-01-03 stsp gotd->nconnection_limits = nlimits;
802 40b85cca 2023-01-03 stsp qsort(gotd->connection_limits, gotd->nconnection_limits,
803 40b85cca 2023-01-03 stsp sizeof(gotd->connection_limits[0]), uid_connection_limit_cmp);
808 13b2bc37 2022-10-23 stsp static struct gotd_repo *
809 13b2bc37 2022-10-23 stsp conf_new_repo(const char *name)
811 13b2bc37 2022-10-23 stsp struct gotd_repo *repo;
813 7683f79a 2023-01-02 stsp if (name[0] == '\0') {
814 7683f79a 2023-01-02 stsp fatalx("syntax error: empty repository name found in %s",
815 7683f79a 2023-01-02 stsp file->name);
818 2507ffb7 2023-01-02 stsp if (strchr(name, '\n') != NULL)
819 2507ffb7 2023-01-02 stsp fatalx("repository names must not contain linefeeds: %s", name);
821 13b2bc37 2022-10-23 stsp repo = calloc(1, sizeof(*repo));
822 13b2bc37 2022-10-23 stsp if (repo == NULL)
823 13b2bc37 2022-10-23 stsp fatalx("%s: calloc", __func__);
825 0ccf3acb 2022-11-16 stsp STAILQ_INIT(&repo->rules);
827 13b2bc37 2022-10-23 stsp if (strlcpy(repo->name, name, sizeof(repo->name)) >=
828 13b2bc37 2022-10-23 stsp sizeof(repo->name))
829 13b2bc37 2022-10-23 stsp fatalx("%s: strlcpy", __func__);
831 13b2bc37 2022-10-23 stsp TAILQ_INSERT_TAIL(&gotd->repos, repo, entry);
832 13b2bc37 2022-10-23 stsp gotd->nrepos++;
834 13b2bc37 2022-10-23 stsp return repo;
837 0ccf3acb 2022-11-16 stsp static void
838 0ccf3acb 2022-11-16 stsp conf_new_access_rule(struct gotd_repo *repo, enum gotd_access access,
839 0ccf3acb 2022-11-16 stsp int authorization, char *identifier)
841 0ccf3acb 2022-11-16 stsp struct gotd_access_rule *rule;
843 0ccf3acb 2022-11-16 stsp rule = calloc(1, sizeof(*rule));
844 0ccf3acb 2022-11-16 stsp if (rule == NULL)
845 0ccf3acb 2022-11-16 stsp fatal("calloc");
847 0ccf3acb 2022-11-16 stsp rule->access = access;
848 0ccf3acb 2022-11-16 stsp rule->authorization = authorization;
849 0ccf3acb 2022-11-16 stsp rule->identifier = identifier;
851 0ccf3acb 2022-11-16 stsp STAILQ_INSERT_TAIL(&repo->rules, rule, entry);
855 13b2bc37 2022-10-23 stsp symset(const char *nam, const char *val, int persist)
857 13b2bc37 2022-10-23 stsp struct sym *sym;
859 13b2bc37 2022-10-23 stsp TAILQ_FOREACH(sym, &symhead, entry) {
860 13b2bc37 2022-10-23 stsp if (strcmp(nam, sym->nam) == 0)
864 13b2bc37 2022-10-23 stsp if (sym != NULL) {
865 13b2bc37 2022-10-23 stsp if (sym->persist == 1)
866 13b2bc37 2022-10-23 stsp return (0);
868 13b2bc37 2022-10-23 stsp free(sym->nam);
869 13b2bc37 2022-10-23 stsp free(sym->val);
870 13b2bc37 2022-10-23 stsp TAILQ_REMOVE(&symhead, sym, entry);
874 13b2bc37 2022-10-23 stsp sym = calloc(1, sizeof(*sym));
875 13b2bc37 2022-10-23 stsp if (sym == NULL)
876 13b2bc37 2022-10-23 stsp return (-1);
878 13b2bc37 2022-10-23 stsp sym->nam = strdup(nam);
879 13b2bc37 2022-10-23 stsp if (sym->nam == NULL) {
881 13b2bc37 2022-10-23 stsp return (-1);
883 13b2bc37 2022-10-23 stsp sym->val = strdup(val);
884 13b2bc37 2022-10-23 stsp if (sym->val == NULL) {
885 13b2bc37 2022-10-23 stsp free(sym->nam);
887 13b2bc37 2022-10-23 stsp return (-1);
889 13b2bc37 2022-10-23 stsp sym->used = 0;
890 13b2bc37 2022-10-23 stsp sym->persist = persist;
891 13b2bc37 2022-10-23 stsp TAILQ_INSERT_TAIL(&symhead, sym, entry);
892 13b2bc37 2022-10-23 stsp return (0);
896 13b2bc37 2022-10-23 stsp symget(const char *nam)
898 13b2bc37 2022-10-23 stsp struct sym *sym;
900 13b2bc37 2022-10-23 stsp TAILQ_FOREACH(sym, &symhead, entry) {
901 13b2bc37 2022-10-23 stsp if (strcmp(nam, sym->nam) == 0) {
902 13b2bc37 2022-10-23 stsp sym->used = 1;
903 13b2bc37 2022-10-23 stsp return (sym->val);
906 13b2bc37 2022-10-23 stsp return (NULL);