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 28714985 2018-11-17 stsp #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 28714985 2018-11-17 stsp #include <imsg.h>
24 12ce7a6c 2019-08-12 stsp #include <limits.h>
25 28714985 2018-11-17 stsp #include <signal.h>
26 28714985 2018-11-17 stsp #include <stdio.h>
27 28714985 2018-11-17 stsp #include <stdlib.h>
28 28714985 2018-11-17 stsp #include <string.h>
29 28714985 2018-11-17 stsp #include <sha1.h>
30 81a12da5 2020-09-09 naddy #include <unistd.h>
31 28714985 2018-11-17 stsp #include <zlib.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 d5c81d44 2021-07-08 stsp #include "got_lib_sha1.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;
51 28714985 2018-11-17 stsp static const struct got_error *
52 d5c81d44 2021-07-08 stsp read_tag_object(struct got_tag_object **tag, FILE *f,
53 d5c81d44 2021-07-08 stsp struct got_object_id *expected_id)
55 28714985 2018-11-17 stsp const struct got_error *err = NULL;
56 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 268f7291 2018-12-24 stsp err = got_object_parse_header(&obj, p, len);
85 28714985 2018-11-17 stsp if (len < obj->hdrlen + obj->size) {
86 28714985 2018-11-17 stsp err = got_error(GOT_ERR_BAD_OBJ_DATA);
90 28714985 2018-11-17 stsp /* Skip object header. */
91 28714985 2018-11-17 stsp len -= obj->hdrlen;
92 28714985 2018-11-17 stsp err = got_object_parse_tag(tag, p + obj->hdrlen, len);
96 d5c81d44 2021-07-08 stsp got_object_close(obj);
101 28714985 2018-11-17 stsp main(int argc, char *argv[])
103 28714985 2018-11-17 stsp const struct got_error *err = NULL;
104 28714985 2018-11-17 stsp struct imsgbuf ibuf;
105 d5c81d44 2021-07-08 stsp size_t datalen;
107 28714985 2018-11-17 stsp signal(SIGINT, catch_sigint);
109 28714985 2018-11-17 stsp imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
111 28714985 2018-11-17 stsp #ifndef PROFILE
112 28714985 2018-11-17 stsp /* revoke access to most system calls */
113 28714985 2018-11-17 stsp if (pledge("stdio recvfd", NULL) == -1) {
114 638f9024 2019-05-13 stsp err = got_error_from_errno("pledge");
115 28714985 2018-11-17 stsp got_privsep_send_error(&ibuf, err);
121 28714985 2018-11-17 stsp struct imsg imsg;
122 28714985 2018-11-17 stsp FILE *f = NULL;
123 268f7291 2018-12-24 stsp struct got_tag_object *tag = NULL;
124 d5c81d44 2021-07-08 stsp struct got_object_id expected_id;
126 28714985 2018-11-17 stsp if (sigint_received) {
127 28714985 2018-11-17 stsp err = got_error(GOT_ERR_CANCELLED);
131 28714985 2018-11-17 stsp err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
133 28714985 2018-11-17 stsp if (err->code == GOT_ERR_PRIVSEP_PIPE)
134 28714985 2018-11-17 stsp err = NULL;
138 28714985 2018-11-17 stsp if (imsg.hdr.type == GOT_IMSG_STOP)
141 28714985 2018-11-17 stsp if (imsg.hdr.type != GOT_IMSG_TAG_REQUEST) {
142 28714985 2018-11-17 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
146 d5c81d44 2021-07-08 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
147 d5c81d44 2021-07-08 stsp if (datalen != sizeof(expected_id)) {
148 d5c81d44 2021-07-08 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
151 d5c81d44 2021-07-08 stsp memcpy(&expected_id, imsg.data, sizeof(expected_id));
153 28714985 2018-11-17 stsp if (imsg.fd == -1) {
154 28714985 2018-11-17 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
158 28714985 2018-11-17 stsp /* Always assume file offset zero. */
159 28714985 2018-11-17 stsp f = fdopen(imsg.fd, "rb");
160 28714985 2018-11-17 stsp if (f == NULL) {
161 638f9024 2019-05-13 stsp err = got_error_from_errno("fdopen");
165 d5c81d44 2021-07-08 stsp err = read_tag_object(&tag, f, &expected_id);
169 28714985 2018-11-17 stsp err = got_privsep_send_tag(&ibuf, tag);
172 56b63ca4 2021-01-22 stsp if (fclose(f) == EOF && err == NULL)
173 638f9024 2019-05-13 stsp err = got_error_from_errno("fclose");
174 3a6ce05a 2019-02-11 stsp } else if (imsg.fd != -1) {
175 08578a35 2021-01-22 stsp if (close(imsg.fd) == -1 && err == NULL)
176 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
178 28714985 2018-11-17 stsp imsg_free(&imsg);
183 28714985 2018-11-17 stsp imsg_clear(&ibuf);
185 28714985 2018-11-17 stsp if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
186 28714985 2018-11-17 stsp fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
187 28714985 2018-11-17 stsp got_privsep_send_error(&ibuf, err);
190 08578a35 2021-01-22 stsp if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
191 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
192 28714985 2018-11-17 stsp return err ? 1 : 0;