2 5aa81393 2020-01-06 stsp * Copyright (c) 2018, 2019, 2020 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 ad242220 2018-09-08 stsp #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 ad242220 2018-09-08 stsp #include <imsg.h>
24 12ce7a6c 2019-08-12 stsp #include <limits.h>
25 99437157 2018-11-11 stsp #include <signal.h>
26 ad242220 2018-09-08 stsp #include <stdio.h>
27 ad242220 2018-09-08 stsp #include <stdlib.h>
28 ad242220 2018-09-08 stsp #include <string.h>
29 ad242220 2018-09-08 stsp #include <sha1.h>
30 81a12da5 2020-09-09 naddy #include <unistd.h>
31 ad242220 2018-09-08 stsp #include <zlib.h>
33 ad242220 2018-09-08 stsp #include "got_error.h"
34 ad242220 2018-09-08 stsp #include "got_object.h"
35 3022d272 2019-11-14 stsp #include "got_path.h"
37 ad242220 2018-09-08 stsp #include "got_lib_delta.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"
42 d5c81d44 2021-07-08 stsp #include "got_lib_sha1.h"
44 99437157 2018-11-11 stsp static volatile sig_atomic_t sigint_received;
47 99437157 2018-11-11 stsp catch_sigint(int signo)
49 99437157 2018-11-11 stsp sigint_received = 1;
52 ad242220 2018-09-08 stsp static const struct got_error *
53 d294b1dc 2022-10-18 stsp read_tree_object(struct got_parsed_tree_entry **entries, size_t *nentries,
54 d294b1dc 2022-10-18 stsp size_t *nentries_alloc, uint8_t **p, FILE *f, struct got_object_id *expected_id)
56 ad242220 2018-09-08 stsp const struct got_error *err = NULL;
57 d5c81d44 2021-07-08 stsp struct got_object *obj = NULL;
59 d5c81d44 2021-07-08 stsp struct got_inflate_checksum csum;
60 d5c81d44 2021-07-08 stsp SHA1_CTX sha1_ctx;
61 d5c81d44 2021-07-08 stsp struct got_object_id id;
63 d5c81d44 2021-07-08 stsp SHA1Init(&sha1_ctx);
64 d5c81d44 2021-07-08 stsp memset(&csum, 0, sizeof(csum));
65 d5c81d44 2021-07-08 stsp csum.output_sha1 = &sha1_ctx;
67 d5c81d44 2021-07-08 stsp err = got_inflate_to_mem(p, &len, NULL, &csum, f);
71 d5c81d44 2021-07-08 stsp SHA1Final(id.sha1, &sha1_ctx);
72 d5c81d44 2021-07-08 stsp if (memcmp(expected_id->sha1, id.sha1, SHA1_DIGEST_LENGTH) != 0) {
73 d5c81d44 2021-07-08 stsp char buf[SHA1_DIGEST_STRING_LENGTH];
74 d5c81d44 2021-07-08 stsp err = got_error_fmt(GOT_ERR_OBJ_CSUM,
75 d5c81d44 2021-07-08 stsp "checksum failure for object %s",
76 d5c81d44 2021-07-08 stsp got_sha1_digest_to_str(expected_id->sha1, buf,
77 d5c81d44 2021-07-08 stsp sizeof(buf)));
81 3022d272 2019-11-14 stsp err = got_object_parse_header(&obj, *p, len);
85 ad242220 2018-09-08 stsp if (len < obj->hdrlen + obj->size) {
86 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_BAD_OBJ_DATA);
90 ad242220 2018-09-08 stsp /* Skip object header. */
91 ad242220 2018-09-08 stsp len -= obj->hdrlen;
92 d294b1dc 2022-10-18 stsp err = got_object_parse_tree(entries, nentries, nentries_alloc,
93 d294b1dc 2022-10-18 stsp *p + obj->hdrlen, len);
96 d5c81d44 2021-07-08 stsp got_object_close(obj);
101 ad242220 2018-09-08 stsp main(int argc, char *argv[])
103 ad242220 2018-09-08 stsp const struct got_error *err = NULL;
104 ad242220 2018-09-08 stsp struct imsgbuf ibuf;
105 d5c81d44 2021-07-08 stsp size_t datalen;
106 d294b1dc 2022-10-18 stsp struct got_parsed_tree_entry *entries = NULL;
107 d294b1dc 2022-10-18 stsp size_t nentries = 0, nentries_alloc = 0;
109 99437157 2018-11-11 stsp signal(SIGINT, catch_sigint);
111 ad242220 2018-09-08 stsp imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
113 2ff12563 2018-09-15 stsp #ifndef PROFILE
114 ad242220 2018-09-08 stsp /* revoke access to most system calls */
115 ad242220 2018-09-08 stsp if (pledge("stdio recvfd", NULL) == -1) {
116 638f9024 2019-05-13 stsp err = got_error_from_errno("pledge");
117 ad242220 2018-09-08 stsp got_privsep_send_error(&ibuf, err);
123 ad242220 2018-09-08 stsp struct imsg imsg;
124 ad242220 2018-09-08 stsp FILE *f = NULL;
125 3022d272 2019-11-14 stsp uint8_t *buf = NULL;
126 d5c81d44 2021-07-08 stsp struct got_object_id expected_id;
128 99437157 2018-11-11 stsp if (sigint_received) {
129 99437157 2018-11-11 stsp err = got_error(GOT_ERR_CANCELLED);
133 ad242220 2018-09-08 stsp err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
135 876c234b 2018-09-10 stsp if (err->code == GOT_ERR_PRIVSEP_PIPE)
136 ad242220 2018-09-08 stsp err = NULL;
140 ad242220 2018-09-08 stsp if (imsg.hdr.type == GOT_IMSG_STOP)
143 ad242220 2018-09-08 stsp if (imsg.hdr.type != GOT_IMSG_TREE_REQUEST) {
144 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
148 d5c81d44 2021-07-08 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
149 d5c81d44 2021-07-08 stsp if (datalen != sizeof(expected_id)) {
150 d5c81d44 2021-07-08 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
153 d5c81d44 2021-07-08 stsp memcpy(&expected_id, imsg.data, sizeof(expected_id));
155 ad242220 2018-09-08 stsp if (imsg.fd == -1) {
156 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
160 ad242220 2018-09-08 stsp /* Always assume file offset zero. */
161 ad242220 2018-09-08 stsp f = fdopen(imsg.fd, "rb");
162 ad242220 2018-09-08 stsp if (f == NULL) {
163 638f9024 2019-05-13 stsp err = got_error_from_errno("fdopen");
167 d294b1dc 2022-10-18 stsp err = read_tree_object(&entries, &nentries, &nentries_alloc,
168 d294b1dc 2022-10-18 stsp &buf, f, &expected_id);
172 9985f404 2022-05-19 stsp err = got_privsep_send_tree(&ibuf, entries, nentries);
176 56b63ca4 2021-01-22 stsp if (fclose(f) == EOF && err == NULL)
177 638f9024 2019-05-13 stsp err = got_error_from_errno("fclose");
178 3a6ce05a 2019-02-11 stsp } else if (imsg.fd != -1) {
179 08578a35 2021-01-22 stsp if (close(imsg.fd) == -1 && err == NULL)
180 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
182 ad242220 2018-09-08 stsp imsg_free(&imsg);
187 d294b1dc 2022-10-18 stsp free(entries);
188 ad242220 2018-09-08 stsp imsg_clear(&ibuf);
190 80d5f134 2018-11-11 stsp if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
191 80d5f134 2018-11-11 stsp fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
192 99437157 2018-11-11 stsp got_privsep_send_error(&ibuf, err);
195 08578a35 2021-01-22 stsp if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
196 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
197 ad242220 2018-09-08 stsp return err ? 1 : 0;
