2 ad242220 2018-09-08 stsp * Copyright (c) 2018 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 588a8092 2023-02-23 thomas #include <sha1.h>
29 588a8092 2023-02-23 thomas #include <sha2.h>
30 81a12da5 2020-09-09 naddy #include <unistd.h>
31 ad242220 2018-09-08 stsp #include <zlib.h>
33 dd038bc6 2021-09-21 thomas.ad #include "got_compat.h"
35 ad242220 2018-09-08 stsp #include "got_error.h"
36 ad242220 2018-09-08 stsp #include "got_object.h"
38 ad242220 2018-09-08 stsp #include "got_lib_delta.h"
39 ad242220 2018-09-08 stsp #include "got_lib_inflate.h"
40 ad242220 2018-09-08 stsp #include "got_lib_object.h"
41 1785f84a 2018-12-23 stsp #include "got_lib_object_parse.h"
42 ad242220 2018-09-08 stsp #include "got_lib_privsep.h"
43 be288a59 2023-02-23 thomas #include "got_lib_hash.h"
45 ad242220 2018-09-08 stsp #ifndef nitems
46 ad242220 2018-09-08 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
49 ad242220 2018-09-08 stsp #define GOT_OBJ_TAG_COMMIT "commit"
50 ad242220 2018-09-08 stsp #define GOT_OBJ_TAG_TREE "tree"
51 ad242220 2018-09-08 stsp #define GOT_OBJ_TAG_BLOB "blob"
52 f4a881ce 2018-11-17 stsp #define GOT_OBJ_TAG_TAG "tag"
54 99437157 2018-11-11 stsp static volatile sig_atomic_t sigint_received;
57 99437157 2018-11-11 stsp catch_sigint(int signo)
59 99437157 2018-11-11 stsp sigint_received = 1;
62 59d1e4a0 2021-03-10 stsp static const struct got_error *
63 d5c81d44 2021-07-08 stsp send_raw_obj(struct imsgbuf *ibuf, struct got_object *obj,
64 d5c81d44 2021-07-08 stsp struct got_object_id *expected_id,
65 d5c81d44 2021-07-08 stsp int fd, int outfd)
67 59d1e4a0 2021-03-10 stsp const struct got_error *err = NULL;
68 59d1e4a0 2021-03-10 stsp uint8_t *data = NULL;
69 3efd8e31 2022-10-23 thomas off_t size;
70 3efd8e31 2022-10-23 thomas size_t hdrlen;
72 59d1e4a0 2021-03-10 stsp if (lseek(fd, SEEK_SET, 0) == -1) {
73 59d1e4a0 2021-03-10 stsp err = got_error_from_errno("lseek");
74 3efd8e31 2022-10-23 thomas goto done;
77 3efd8e31 2022-10-23 thomas err = got_object_read_raw(&data, &size, &hdrlen,
78 3efd8e31 2022-10-23 thomas GOT_PRIVSEP_INLINE_BLOB_DATA_MAX, outfd, expected_id, fd);
82 3efd8e31 2022-10-23 thomas err = got_privsep_send_raw_obj(ibuf, size, hdrlen, data);
85 3efd8e31 2022-10-23 thomas if (close(fd) == -1 && err == NULL)
86 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
91 ad242220 2018-09-08 stsp main(int argc, char *argv[])
93 ad242220 2018-09-08 stsp const struct got_error *err = NULL;
94 ad242220 2018-09-08 stsp struct got_object *obj = NULL;
95 ad242220 2018-09-08 stsp struct imsg imsg;
96 ad242220 2018-09-08 stsp struct imsgbuf ibuf;
97 ad242220 2018-09-08 stsp size_t datalen;
98 d5c81d44 2021-07-08 stsp struct got_object_id expected_id;
100 99437157 2018-11-11 stsp signal(SIGINT, catch_sigint);
102 ad242220 2018-09-08 stsp imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
104 2ff12563 2018-09-15 stsp #ifndef PROFILE
105 ad242220 2018-09-08 stsp /* revoke access to most system calls */
106 ad242220 2018-09-08 stsp if (pledge("stdio recvfd", NULL) == -1) {
107 638f9024 2019-05-13 stsp err = got_error_from_errno("pledge");
108 ad242220 2018-09-08 stsp got_privsep_send_error(&ibuf, err);
112 97799ccd 2022-02-06 thomas /* revoke fs access */
113 97799ccd 2022-02-06 thomas if (landlock_no_fs() == -1) {
114 97799ccd 2022-02-06 thomas err = got_error_from_errno("landlock_no_fs");
115 97799ccd 2022-02-06 thomas got_privsep_send_error(&ibuf, err);
116 97799ccd 2022-02-06 thomas return 1;
118 5d120ea8 2022-06-23 op if (cap_enter() == -1) {
119 5d120ea8 2022-06-23 op err = got_error_from_errno("cap_enter");
120 5d120ea8 2022-06-23 op got_privsep_send_error(&ibuf, err);
126 99437157 2018-11-11 stsp if (sigint_received) {
127 99437157 2018-11-11 stsp err = got_error(GOT_ERR_CANCELLED);
131 ad242220 2018-09-08 stsp err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
133 876c234b 2018-09-10 stsp if (err->code == GOT_ERR_PRIVSEP_PIPE)
134 ad242220 2018-09-08 stsp err = NULL;
138 ad242220 2018-09-08 stsp if (imsg.hdr.type == GOT_IMSG_STOP)
141 59d1e4a0 2021-03-10 stsp if (imsg.hdr.type != GOT_IMSG_OBJECT_REQUEST &&
142 59d1e4a0 2021-03-10 stsp imsg.hdr.type != GOT_IMSG_RAW_OBJECT_REQUEST) {
143 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
147 ad242220 2018-09-08 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
148 d5c81d44 2021-07-08 stsp if (datalen != sizeof(expected_id)) {
149 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
152 d5c81d44 2021-07-08 stsp memcpy(&expected_id, imsg.data, sizeof(expected_id));
154 59d1e4a0 2021-03-10 stsp if (imsg.fd == -1) {
155 59d1e4a0 2021-03-10 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
159 1785f84a 2018-12-23 stsp err = got_object_read_header(&obj, imsg.fd);
163 59d1e4a0 2021-03-10 stsp if (imsg.hdr.type == GOT_IMSG_RAW_OBJECT_REQUEST) {
164 59d1e4a0 2021-03-10 stsp struct imsg imsg_outfd;
166 59d1e4a0 2021-03-10 stsp err = got_privsep_recv_imsg(&imsg_outfd, &ibuf, 0);
168 59d1e4a0 2021-03-10 stsp if (imsg_outfd.hdr.len == 0)
169 59d1e4a0 2021-03-10 stsp err = NULL;
173 59d1e4a0 2021-03-10 stsp if (imsg_outfd.hdr.type == GOT_IMSG_STOP) {
174 59d1e4a0 2021-03-10 stsp imsg_free(&imsg_outfd);
178 59d1e4a0 2021-03-10 stsp if (imsg_outfd.hdr.type != GOT_IMSG_RAW_OBJECT_OUTFD) {
179 59d1e4a0 2021-03-10 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
180 59d1e4a0 2021-03-10 stsp imsg_free(&imsg_outfd);
184 59d1e4a0 2021-03-10 stsp datalen = imsg_outfd.hdr.len - IMSG_HEADER_SIZE;
185 59d1e4a0 2021-03-10 stsp if (datalen != 0) {
186 59d1e4a0 2021-03-10 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
187 59d1e4a0 2021-03-10 stsp imsg_free(&imsg_outfd);
190 59d1e4a0 2021-03-10 stsp if (imsg_outfd.fd == -1) {
191 59d1e4a0 2021-03-10 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
192 59d1e4a0 2021-03-10 stsp imsg_free(&imsg_outfd);
195 d5c81d44 2021-07-08 stsp err = send_raw_obj(&ibuf, obj, &expected_id,
196 d5c81d44 2021-07-08 stsp imsg.fd, imsg_outfd.fd);
197 59d1e4a0 2021-03-10 stsp imsg.fd = -1; /* imsg.fd is owned by send_raw_obj() */
198 e5ad7365 2021-05-20 stsp if (close(imsg_outfd.fd) == -1 && err == NULL)
199 e5ad7365 2021-05-20 stsp err = got_error_from_errno("close");
200 59d1e4a0 2021-03-10 stsp imsg_free(&imsg_outfd);
204 59d1e4a0 2021-03-10 stsp err = got_privsep_send_obj(&ibuf, obj);
206 59d1e4a0 2021-03-10 stsp if (imsg.fd != -1 && close(imsg.fd) == -1 && err == NULL)
207 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
208 ad242220 2018-09-08 stsp imsg_free(&imsg);
210 ad242220 2018-09-08 stsp got_object_close(obj);
215 ad242220 2018-09-08 stsp imsg_clear(&ibuf);
217 80d5f134 2018-11-11 stsp if(!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
218 80d5f134 2018-11-11 stsp fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
219 99437157 2018-11-11 stsp got_privsep_send_error(&ibuf, err);
222 08578a35 2021-01-22 stsp if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
223 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
224 ad242220 2018-09-08 stsp return err ? 1 : 0;
