2 28714985 2018-11-17 stsp * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
4 28714985 2018-11-17 stsp * Permission to use, copy, modify, and distribute this software for any
5 28714985 2018-11-17 stsp * purpose with or without fee is hereby granted, provided that the above
6 28714985 2018-11-17 stsp * copyright notice and this permission notice appear in all copies.
8 28714985 2018-11-17 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 28714985 2018-11-17 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 28714985 2018-11-17 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 28714985 2018-11-17 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 28714985 2018-11-17 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 28714985 2018-11-17 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 28714985 2018-11-17 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 28714985 2018-11-17 stsp #include <sys/types.h>
18 8b925c6c 2022-07-16 thomas #include <sys/queue.h>
19 28714985 2018-11-17 stsp #include <sys/uio.h>
20 28714985 2018-11-17 stsp #include <sys/time.h>
22 28714985 2018-11-17 stsp #include <stdint.h>
23 12ce7a6c 2019-08-12 stsp #include <limits.h>
24 28714985 2018-11-17 stsp #include <signal.h>
25 28714985 2018-11-17 stsp #include <stdio.h>
26 28714985 2018-11-17 stsp #include <stdlib.h>
27 28714985 2018-11-17 stsp #include <string.h>
28 81a12da5 2020-09-09 naddy #include <unistd.h>
29 28714985 2018-11-17 stsp #include <zlib.h>
31 dd038bc6 2021-09-21 thomas.ad #include "got_compat.h"
33 28714985 2018-11-17 stsp #include "got_error.h"
34 28714985 2018-11-17 stsp #include "got_object.h"
36 28714985 2018-11-17 stsp #include "got_lib_delta.h"
37 28714985 2018-11-17 stsp #include "got_lib_inflate.h"
38 28714985 2018-11-17 stsp #include "got_lib_object.h"
39 28714985 2018-11-17 stsp #include "got_lib_object_parse.h"
40 28714985 2018-11-17 stsp #include "got_lib_privsep.h"
41 be288a59 2023-02-23 thomas #include "got_lib_hash.h"
43 28714985 2018-11-17 stsp static volatile sig_atomic_t sigint_received;
46 28714985 2018-11-17 stsp catch_sigint(int signo)
48 28714985 2018-11-17 stsp sigint_received = 1;
52 28714985 2018-11-17 stsp main(int argc, char *argv[])
54 28714985 2018-11-17 stsp const struct got_error *err = NULL;
55 28714985 2018-11-17 stsp struct imsgbuf ibuf;
56 d5c81d44 2021-07-08 stsp size_t datalen;
58 28714985 2018-11-17 stsp signal(SIGINT, catch_sigint);
60 28714985 2018-11-17 stsp imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
62 28714985 2018-11-17 stsp #ifndef PROFILE
63 28714985 2018-11-17 stsp /* revoke access to most system calls */
64 28714985 2018-11-17 stsp if (pledge("stdio recvfd", NULL) == -1) {
65 638f9024 2019-05-13 stsp err = got_error_from_errno("pledge");
66 28714985 2018-11-17 stsp got_privsep_send_error(&ibuf, err);
70 97799ccd 2022-02-06 thomas /* revoke fs access */
71 97799ccd 2022-02-06 thomas if (landlock_no_fs() == -1) {
72 97799ccd 2022-02-06 thomas err = got_error_from_errno("landlock_no_fs");
73 97799ccd 2022-02-06 thomas got_privsep_send_error(&ibuf, err);
76 5d120ea8 2022-06-23 op if (cap_enter() == -1) {
77 5d120ea8 2022-06-23 op err = got_error_from_errno("cap_enter");
78 5d120ea8 2022-06-23 op got_privsep_send_error(&ibuf, err);
84 28714985 2018-11-17 stsp struct imsg imsg;
85 268f7291 2018-12-24 stsp struct got_tag_object *tag = NULL;
86 d5c81d44 2021-07-08 stsp struct got_object_id expected_id;
87 3d97effa 2024-01-31 thomas int fd = -1;
89 28714985 2018-11-17 stsp if (sigint_received) {
90 28714985 2018-11-17 stsp err = got_error(GOT_ERR_CANCELLED);
94 28714985 2018-11-17 stsp err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
96 28714985 2018-11-17 stsp if (err->code == GOT_ERR_PRIVSEP_PIPE)
101 28714985 2018-11-17 stsp if (imsg.hdr.type == GOT_IMSG_STOP)
104 28714985 2018-11-17 stsp if (imsg.hdr.type != GOT_IMSG_TAG_REQUEST) {
105 28714985 2018-11-17 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
109 d5c81d44 2021-07-08 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
110 d5c81d44 2021-07-08 stsp if (datalen != sizeof(expected_id)) {
111 d5c81d44 2021-07-08 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
114 d5c81d44 2021-07-08 stsp memcpy(&expected_id, imsg.data, sizeof(expected_id));
116 3d97effa 2024-01-31 thomas fd = imsg_get_fd(&imsg);
117 3d97effa 2024-01-31 thomas if (fd == -1) {
118 28714985 2018-11-17 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
122 28714985 2018-11-17 stsp /* Always assume file offset zero. */
123 3d97effa 2024-01-31 thomas err = got_object_read_tag(&tag, fd, &expected_id, 0);
127 28714985 2018-11-17 stsp err = got_privsep_send_tag(&ibuf, tag);
129 3d97effa 2024-01-31 thomas if (fd != -1 && close(fd) == -1 && err == NULL)
130 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
131 28714985 2018-11-17 stsp imsg_free(&imsg);
136 28714985 2018-11-17 stsp imsg_clear(&ibuf);
138 28714985 2018-11-17 stsp if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
139 28714985 2018-11-17 stsp fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
140 28714985 2018-11-17 stsp got_privsep_send_error(&ibuf, err);
143 08578a35 2021-01-22 stsp if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
144 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
145 28714985 2018-11-17 stsp return err ? 1 : 0;
