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"
36 ad242220 2018-09-08 stsp #include "got_lib_delta.h"
37 ad242220 2018-09-08 stsp #include "got_lib_inflate.h"
38 ad242220 2018-09-08 stsp #include "got_lib_object.h"
39 ad242220 2018-09-08 stsp #include "got_lib_object_parse.h"
40 ad242220 2018-09-08 stsp #include "got_lib_privsep.h"
41 d5c81d44 2021-07-08 stsp #include "got_lib_sha1.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;
51 ad242220 2018-09-08 stsp static const struct got_error *
52 d5c81d44 2021-07-08 stsp read_commit_object(struct got_commit_object **commit, FILE *f,
53 d5c81d44 2021-07-08 stsp struct got_object_id *expected_id)
55 d5c81d44 2021-07-08 stsp struct got_object *obj = NULL;
56 41fa1437 2018-11-05 stsp const struct got_error *err = 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 d5c81d44 2021-07-08 stsp err = got_object_parse_header(&obj, p, len);
85 41fa1437 2018-11-05 stsp if (len < obj->hdrlen + obj->size) {
86 41fa1437 2018-11-05 stsp err = got_error(GOT_ERR_BAD_OBJ_DATA);
90 1785f84a 2018-12-23 stsp if (obj->type != GOT_OBJ_TYPE_COMMIT) {
91 1785f84a 2018-12-23 stsp err = got_error(GOT_ERR_OBJ_TYPE);
95 ad242220 2018-09-08 stsp /* Skip object header. */
96 41fa1437 2018-11-05 stsp len -= obj->hdrlen;
97 ad242220 2018-09-08 stsp err = got_object_parse_commit(commit, p + obj->hdrlen, len);
101 d5c81d44 2021-07-08 stsp got_object_close(obj);
102 ad242220 2018-09-08 stsp return err;
106 ad242220 2018-09-08 stsp main(int argc, char *argv[])
108 ad242220 2018-09-08 stsp const struct got_error *err = NULL;
109 ad242220 2018-09-08 stsp struct imsgbuf ibuf;
110 d5c81d44 2021-07-08 stsp size_t datalen;
112 99437157 2018-11-11 stsp signal(SIGINT, catch_sigint);
114 ad242220 2018-09-08 stsp imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
116 2ff12563 2018-09-15 stsp #ifndef PROFILE
117 ad242220 2018-09-08 stsp /* revoke access to most system calls */
118 ad242220 2018-09-08 stsp if (pledge("stdio recvfd", NULL) == -1) {
119 638f9024 2019-05-13 stsp err = got_error_from_errno("pledge");
120 ad242220 2018-09-08 stsp got_privsep_send_error(&ibuf, err);
126 ad242220 2018-09-08 stsp struct imsg imsg;
127 ad242220 2018-09-08 stsp FILE *f = NULL;
128 1785f84a 2018-12-23 stsp struct got_commit_object *commit = NULL;
129 d5c81d44 2021-07-08 stsp struct got_object_id expected_id;
131 99437157 2018-11-11 stsp if (sigint_received) {
132 99437157 2018-11-11 stsp err = got_error(GOT_ERR_CANCELLED);
136 ad242220 2018-09-08 stsp err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
138 876c234b 2018-09-10 stsp if (err->code == GOT_ERR_PRIVSEP_PIPE)
139 ad242220 2018-09-08 stsp err = NULL;
143 ad242220 2018-09-08 stsp if (imsg.hdr.type == GOT_IMSG_STOP)
146 41fa1437 2018-11-05 stsp if (imsg.hdr.type != GOT_IMSG_COMMIT_REQUEST) {
147 41fa1437 2018-11-05 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
151 d5c81d44 2021-07-08 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
152 d5c81d44 2021-07-08 stsp if (datalen != sizeof(expected_id)) {
153 d5c81d44 2021-07-08 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
156 d5c81d44 2021-07-08 stsp memcpy(&expected_id, imsg.data, sizeof(expected_id));
158 ad242220 2018-09-08 stsp if (imsg.fd == -1) {
159 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
163 ad242220 2018-09-08 stsp /* Always assume file offset zero. */
164 ad242220 2018-09-08 stsp f = fdopen(imsg.fd, "rb");
165 ad242220 2018-09-08 stsp if (f == NULL) {
166 638f9024 2019-05-13 stsp err = got_error_from_errno("fdopen");
170 d5c81d44 2021-07-08 stsp err = read_commit_object(&commit, f, &expected_id);
174 41fa1437 2018-11-05 stsp err = got_privsep_send_commit(&ibuf, commit);
175 fe558a04 2020-01-06 stsp got_object_commit_close(commit);
178 56b63ca4 2021-01-22 stsp if (fclose(f) == EOF && err == NULL)
179 638f9024 2019-05-13 stsp err = got_error_from_errno("fclose");
180 3a6ce05a 2019-02-11 stsp } else if (imsg.fd != -1) {
181 08578a35 2021-01-22 stsp if (close(imsg.fd) == -1 && err == NULL)
182 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
184 ad242220 2018-09-08 stsp imsg_free(&imsg);
189 ad242220 2018-09-08 stsp imsg_clear(&ibuf);
191 80d5f134 2018-11-11 stsp if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
192 80d5f134 2018-11-11 stsp fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
193 99437157 2018-11-11 stsp got_privsep_send_error(&ibuf, err);
196 08578a35 2021-01-22 stsp if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
197 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
198 ad242220 2018-09-08 stsp return err ? 1 : 0;
