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>
21 28714985 2018-11-17 stsp #include <sys/limits.h>
22 28714985 2018-11-17 stsp #include <sys/syslimits.h>
24 28714985 2018-11-17 stsp #include <stdint.h>
25 28714985 2018-11-17 stsp #include <imsg.h>
26 28714985 2018-11-17 stsp #include <signal.h>
27 28714985 2018-11-17 stsp #include <stdio.h>
28 28714985 2018-11-17 stsp #include <stdlib.h>
29 28714985 2018-11-17 stsp #include <string.h>
30 28714985 2018-11-17 stsp #include <sha1.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"
42 28714985 2018-11-17 stsp static volatile sig_atomic_t sigint_received;
45 28714985 2018-11-17 stsp catch_sigint(int signo)
47 28714985 2018-11-17 stsp sigint_received = 1;
50 28714985 2018-11-17 stsp static const struct got_error *
51 28714985 2018-11-17 stsp read_tag_object(struct got_tag_object **tag, struct got_object *obj,
54 28714985 2018-11-17 stsp const struct got_error *err = NULL;
58 28714985 2018-11-17 stsp if (obj->flags & GOT_OBJ_FLAG_PACKED)
59 28714985 2018-11-17 stsp err = got_read_file_to_mem(&p, &len, f);
61 28714985 2018-11-17 stsp err = got_inflate_to_mem(&p, &len, f);
65 28714985 2018-11-17 stsp if (len < obj->hdrlen + obj->size) {
66 28714985 2018-11-17 stsp err = got_error(GOT_ERR_BAD_OBJ_DATA);
70 28714985 2018-11-17 stsp /* Skip object header. */
71 28714985 2018-11-17 stsp len -= obj->hdrlen;
72 28714985 2018-11-17 stsp err = got_object_parse_tag(tag, p + obj->hdrlen, len);
79 28714985 2018-11-17 stsp main(int argc, char *argv[])
81 28714985 2018-11-17 stsp const struct got_error *err = NULL;
82 28714985 2018-11-17 stsp struct got_tag_object *tag = NULL;
83 28714985 2018-11-17 stsp struct imsgbuf ibuf;
84 28714985 2018-11-17 stsp size_t datalen;
86 28714985 2018-11-17 stsp signal(SIGINT, catch_sigint);
88 28714985 2018-11-17 stsp imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
90 28714985 2018-11-17 stsp #ifndef PROFILE
91 28714985 2018-11-17 stsp /* revoke access to most system calls */
92 28714985 2018-11-17 stsp if (pledge("stdio recvfd", NULL) == -1) {
93 28714985 2018-11-17 stsp err = got_error_from_errno();
94 28714985 2018-11-17 stsp got_privsep_send_error(&ibuf, err);
100 28714985 2018-11-17 stsp struct imsg imsg;
101 28714985 2018-11-17 stsp struct got_imsg_object iobj;
102 28714985 2018-11-17 stsp FILE *f = NULL;
103 28714985 2018-11-17 stsp struct got_object *obj = NULL;
105 28714985 2018-11-17 stsp if (sigint_received) {
106 28714985 2018-11-17 stsp err = got_error(GOT_ERR_CANCELLED);
110 28714985 2018-11-17 stsp err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
112 28714985 2018-11-17 stsp if (err->code == GOT_ERR_PRIVSEP_PIPE)
113 28714985 2018-11-17 stsp err = NULL;
117 28714985 2018-11-17 stsp if (imsg.hdr.type == GOT_IMSG_STOP)
120 28714985 2018-11-17 stsp if (imsg.hdr.type != GOT_IMSG_TAG_REQUEST) {
121 28714985 2018-11-17 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
125 28714985 2018-11-17 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
126 28714985 2018-11-17 stsp if (datalen != sizeof(iobj)) {
127 28714985 2018-11-17 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
131 28714985 2018-11-17 stsp memcpy(&iobj, imsg.data, sizeof(iobj));
132 28714985 2018-11-17 stsp if (iobj.type != GOT_OBJ_TYPE_TAG) {
133 28714985 2018-11-17 stsp err = got_error(GOT_ERR_OBJ_TYPE);
137 28714985 2018-11-17 stsp if (imsg.fd == -1) {
138 28714985 2018-11-17 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
142 28714985 2018-11-17 stsp obj = calloc(1, sizeof(*obj));
143 28714985 2018-11-17 stsp if (obj == NULL) {
144 28714985 2018-11-17 stsp err = got_error_from_errno();
147 28714985 2018-11-17 stsp obj->type = iobj.type;
148 28714985 2018-11-17 stsp obj->hdrlen = iobj.hdrlen;
149 28714985 2018-11-17 stsp obj->size = iobj.size;
151 28714985 2018-11-17 stsp /* Always assume file offset zero. */
152 28714985 2018-11-17 stsp f = fdopen(imsg.fd, "rb");
153 28714985 2018-11-17 stsp if (f == NULL) {
154 28714985 2018-11-17 stsp err = got_error_from_errno();
158 28714985 2018-11-17 stsp err = read_tag_object(&tag, obj, f);
162 28714985 2018-11-17 stsp err = got_privsep_send_tag(&ibuf, tag);
166 28714985 2018-11-17 stsp else if (imsg.fd != -1)
167 28714985 2018-11-17 stsp close(imsg.fd);
168 28714985 2018-11-17 stsp imsg_free(&imsg);
170 28714985 2018-11-17 stsp got_object_close(obj);
175 28714985 2018-11-17 stsp imsg_clear(&ibuf);
177 28714985 2018-11-17 stsp if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
178 28714985 2018-11-17 stsp fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
179 28714985 2018-11-17 stsp got_privsep_send_error(&ibuf, err);
182 28714985 2018-11-17 stsp close(GOT_IMSG_FD_CHILD);
183 28714985 2018-11-17 stsp return err ? 1 : 0;