2 5d56da81 2019-01-13 stsp * Copyright (c) 2018, 2019 Stefan Sperling <stsp@openbsd.org>
4 ad242220 2018-09-08 stsp * Permission to use, copy, modify, and distribute this software for any
5 ad242220 2018-09-08 stsp * purpose with or without fee is hereby granted, provided that the above
6 ad242220 2018-09-08 stsp * copyright notice and this permission notice appear in all copies.
8 ad242220 2018-09-08 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 ad242220 2018-09-08 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 ad242220 2018-09-08 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 ad242220 2018-09-08 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 ad242220 2018-09-08 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 ad242220 2018-09-08 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 ad242220 2018-09-08 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 ad242220 2018-09-08 stsp #include <sys/types.h>
18 8b925c6c 2022-07-16 thomas #include <sys/queue.h>
19 ad242220 2018-09-08 stsp #include <sys/uio.h>
20 ad242220 2018-09-08 stsp #include <sys/time.h>
22 ad242220 2018-09-08 stsp #include <stdint.h>
23 12ce7a6c 2019-08-12 stsp #include <limits.h>
24 99437157 2018-11-11 stsp #include <signal.h>
25 ad242220 2018-09-08 stsp #include <stdio.h>
26 ad242220 2018-09-08 stsp #include <stdlib.h>
27 ad242220 2018-09-08 stsp #include <string.h>
28 81a12da5 2020-09-09 naddy #include <unistd.h>
29 ad242220 2018-09-08 stsp #include <zlib.h>
31 dd038bc6 2021-09-21 thomas.ad #include "got_compat.h"
33 ad242220 2018-09-08 stsp #include "got_error.h"
34 ad242220 2018-09-08 stsp #include "got_object.h"
36 ad242220 2018-09-08 stsp #include "got_lib_delta.h"
37 b16893ba 2023-02-24 thomas #include "got_lib_hash.h"
38 ad242220 2018-09-08 stsp #include "got_lib_inflate.h"
39 ad242220 2018-09-08 stsp #include "got_lib_object.h"
40 ad242220 2018-09-08 stsp #include "got_lib_object_parse.h"
41 ad242220 2018-09-08 stsp #include "got_lib_privsep.h"
43 99437157 2018-11-11 stsp static volatile sig_atomic_t sigint_received;
46 99437157 2018-11-11 stsp catch_sigint(int signo)
48 99437157 2018-11-11 stsp sigint_received = 1;
52 ad242220 2018-09-08 stsp main(int argc, char *argv[])
54 ad242220 2018-09-08 stsp const struct got_error *err = NULL;
55 ad242220 2018-09-08 stsp struct imsgbuf ibuf;
56 ad242220 2018-09-08 stsp size_t datalen;
58 99437157 2018-11-11 stsp signal(SIGINT, catch_sigint);
60 ad242220 2018-09-08 stsp imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
62 2ff12563 2018-09-15 stsp #ifndef PROFILE
63 ad242220 2018-09-08 stsp /* revoke access to most system calls */
64 ad242220 2018-09-08 stsp if (pledge("stdio recvfd", NULL) == -1) {
65 638f9024 2019-05-13 stsp err = got_error_from_errno("pledge");
66 ad242220 2018-09-08 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 ad242220 2018-09-08 stsp struct imsg imsg, imsg_outfd;
85 ad242220 2018-09-08 stsp FILE *f = NULL;
86 3d97effa 2024-01-31 thomas int fd = -1, outfd = -1;
87 ad242220 2018-09-08 stsp size_t size;
88 ebc55e2d 2018-12-24 stsp struct got_object *obj = NULL;
89 ac544f8c 2019-01-13 stsp uint8_t *buf = NULL;
90 d5c81d44 2021-07-08 stsp struct got_object_id id;
91 d5c81d44 2021-07-08 stsp struct got_object_id expected_id;
92 d5c81d44 2021-07-08 stsp struct got_inflate_checksum csum;
93 b16893ba 2023-02-24 thomas struct got_hash ctx;
95 b16893ba 2023-02-24 thomas got_hash_init(&ctx, GOT_HASH_SHA1);
96 d5c81d44 2021-07-08 stsp memset(&csum, 0, sizeof(csum));
97 b16893ba 2023-02-24 thomas csum.output_ctx = &ctx;
99 55da3778 2018-09-10 stsp memset(&imsg, 0, sizeof(imsg));
100 55da3778 2018-09-10 stsp memset(&imsg_outfd, 0, sizeof(imsg_outfd));
102 99437157 2018-11-11 stsp if (sigint_received) {
103 99437157 2018-11-11 stsp err = got_error(GOT_ERR_CANCELLED);
107 ad242220 2018-09-08 stsp err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
109 876c234b 2018-09-10 stsp if (err->code == GOT_ERR_PRIVSEP_PIPE)
110 ad242220 2018-09-08 stsp err = NULL;
114 ad242220 2018-09-08 stsp if (imsg.hdr.type == GOT_IMSG_STOP)
117 ad242220 2018-09-08 stsp if (imsg.hdr.type != GOT_IMSG_BLOB_REQUEST) {
118 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
122 d5c81d44 2021-07-08 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
123 d5c81d44 2021-07-08 stsp if (datalen != sizeof(expected_id)) {
124 d5c81d44 2021-07-08 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
127 d5c81d44 2021-07-08 stsp memcpy(&expected_id, imsg.data, sizeof(expected_id));
129 3d97effa 2024-01-31 thomas fd = imsg_get_fd(&imsg);
130 3d97effa 2024-01-31 thomas if (fd == -1) {
131 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
135 ad242220 2018-09-08 stsp err = got_privsep_recv_imsg(&imsg_outfd, &ibuf, 0);
137 ad242220 2018-09-08 stsp if (imsg.hdr.len == 0)
138 ad242220 2018-09-08 stsp err = NULL;
142 ad242220 2018-09-08 stsp if (imsg_outfd.hdr.type == GOT_IMSG_STOP)
145 ad242220 2018-09-08 stsp if (imsg_outfd.hdr.type != GOT_IMSG_BLOB_OUTFD) {
146 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
150 ad242220 2018-09-08 stsp datalen = imsg_outfd.hdr.len - IMSG_HEADER_SIZE;
151 ad242220 2018-09-08 stsp if (datalen != 0) {
152 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
155 3d97effa 2024-01-31 thomas outfd = imsg_get_fd(&imsg_outfd);
156 3d97effa 2024-01-31 thomas if (outfd == -1) {
157 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
161 3d97effa 2024-01-31 thomas err = got_object_read_header(&obj, fd);
165 3d97effa 2024-01-31 thomas if (lseek(fd, SEEK_SET, 0) == -1) {
166 638f9024 2019-05-13 stsp err = got_error_from_errno("lseek");
170 3d97effa 2024-01-31 thomas f = fdopen(fd, "rb");
171 ad242220 2018-09-08 stsp if (f == NULL) {
172 638f9024 2019-05-13 stsp err = got_error_from_errno("fdopen");
177 cc626439 2019-07-15 stsp if (obj->size + obj->hdrlen <=
178 cc626439 2019-07-15 stsp GOT_PRIVSEP_INLINE_BLOB_DATA_MAX) {
179 d5c81d44 2021-07-08 stsp err = got_inflate_to_mem(&buf, &size, NULL, &csum, f);
183 3d97effa 2024-01-31 thomas err = got_inflate_to_fd(&size, f, &csum, outfd);
187 b16893ba 2023-02-24 thomas got_hash_final_object_id(&ctx, &id);
188 28d1e31e 2023-02-03 thomas if (got_object_id_cmp(&expected_id, &id) != 0) {
189 dc43cdc9 2023-02-07 thomas err = got_error_checksum(&expected_id);
193 f392e333 2018-12-24 stsp if (size < obj->hdrlen) {
194 f392e333 2018-12-24 stsp err = got_error(GOT_ERR_BAD_OBJ_HDR);
198 ac544f8c 2019-01-13 stsp err = got_privsep_send_blob(&ibuf, size, obj->hdrlen, buf);
201 098056c9 2024-01-31 thomas if (f && fclose(f) == EOF && err == NULL)
202 098056c9 2024-01-31 thomas err = got_error_from_errno("fclose");
203 098056c9 2024-01-31 thomas if (fd != -1 && close(fd) == -1 && err == NULL)
204 098056c9 2024-01-31 thomas err = got_error_from_errno("close");
205 098056c9 2024-01-31 thomas if (outfd != -1 && close(outfd) == -1 && err == NULL)
206 098056c9 2024-01-31 thomas err = got_error_from_errno("close");
208 ad242220 2018-09-08 stsp imsg_free(&imsg);
209 ad242220 2018-09-08 stsp imsg_free(&imsg_outfd);
211 ebc55e2d 2018-12-24 stsp got_object_close(obj);
216 ad242220 2018-09-08 stsp imsg_clear(&ibuf);
218 80d5f134 2018-11-11 stsp if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
219 80d5f134 2018-11-11 stsp fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
220 99437157 2018-11-11 stsp got_privsep_send_error(&ibuf, err);
223 08578a35 2021-01-22 stsp if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
224 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
225 ad242220 2018-09-08 stsp return err ? 1 : 0;
