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 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 1785f84a 2018-12-23 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 ad242220 2018-09-08 stsp #ifndef nitems
44 ad242220 2018-09-08 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
47 ad242220 2018-09-08 stsp #define GOT_OBJ_TAG_COMMIT "commit"
48 ad242220 2018-09-08 stsp #define GOT_OBJ_TAG_TREE "tree"
49 ad242220 2018-09-08 stsp #define GOT_OBJ_TAG_BLOB "blob"
50 f4a881ce 2018-11-17 stsp #define GOT_OBJ_TAG_TAG "tag"
52 99437157 2018-11-11 stsp static volatile sig_atomic_t sigint_received;
55 99437157 2018-11-11 stsp catch_sigint(int signo)
57 99437157 2018-11-11 stsp sigint_received = 1;
60 59d1e4a0 2021-03-10 stsp static const struct got_error *
61 d5c81d44 2021-07-08 stsp send_raw_obj(struct imsgbuf *ibuf, struct got_object *obj,
62 d5c81d44 2021-07-08 stsp struct got_object_id *expected_id,
63 d5c81d44 2021-07-08 stsp int fd, int outfd)
65 59d1e4a0 2021-03-10 stsp const struct got_error *err = NULL;
66 59d1e4a0 2021-03-10 stsp uint8_t *data = NULL;
67 59d1e4a0 2021-03-10 stsp size_t len = 0, consumed;
69 d5c81d44 2021-07-08 stsp struct got_object_id id;
70 d5c81d44 2021-07-08 stsp struct got_inflate_checksum csum;
71 d5c81d44 2021-07-08 stsp SHA1_CTX sha1_ctx;
73 d5c81d44 2021-07-08 stsp SHA1Init(&sha1_ctx);
74 d5c81d44 2021-07-08 stsp memset(&csum, 0, sizeof(csum));
75 d5c81d44 2021-07-08 stsp csum.output_sha1 = &sha1_ctx;
77 59d1e4a0 2021-03-10 stsp if (lseek(fd, SEEK_SET, 0) == -1) {
78 59d1e4a0 2021-03-10 stsp err = got_error_from_errno("lseek");
83 59d1e4a0 2021-03-10 stsp f = fdopen(fd, "r");
84 59d1e4a0 2021-03-10 stsp if (f == NULL) {
85 59d1e4a0 2021-03-10 stsp err = got_error_from_errno("fdopen");
90 a8591711 2021-06-18 stsp if (obj->size + obj->hdrlen <= GOT_PRIVSEP_INLINE_OBJECT_DATA_MAX)
91 d5c81d44 2021-07-08 stsp err = got_inflate_to_mem(&data, &len, &consumed, &csum, f);
93 d5c81d44 2021-07-08 stsp err = got_inflate_to_fd(&len, f, &csum, outfd);
97 59d1e4a0 2021-03-10 stsp if (len < obj->hdrlen || len != obj->hdrlen + obj->size) {
98 59d1e4a0 2021-03-10 stsp err = got_error(GOT_ERR_BAD_OBJ_HDR);
102 d5c81d44 2021-07-08 stsp SHA1Final(id.sha1, &sha1_ctx);
103 d5c81d44 2021-07-08 stsp if (memcmp(expected_id->sha1, id.sha1, SHA1_DIGEST_LENGTH) != 0) {
104 d5c81d44 2021-07-08 stsp char buf[SHA1_DIGEST_STRING_LENGTH];
105 d5c81d44 2021-07-08 stsp err = got_error_fmt(GOT_ERR_OBJ_CSUM,
106 d5c81d44 2021-07-08 stsp "checksum failure for object %s",
107 d5c81d44 2021-07-08 stsp got_sha1_digest_to_str(expected_id->sha1, buf,
108 d5c81d44 2021-07-08 stsp sizeof(buf)));
113 a8591711 2021-06-18 stsp err = got_privsep_send_raw_obj(ibuf, obj->size, obj->hdrlen, data);
116 59d1e4a0 2021-03-10 stsp free(data);
117 59d1e4a0 2021-03-10 stsp if (fclose(f) == EOF && err == NULL)
118 59d1e4a0 2021-03-10 stsp err = got_error_from_errno("fclose");
120 59d1e4a0 2021-03-10 stsp return err;
124 ad242220 2018-09-08 stsp main(int argc, char *argv[])
126 ad242220 2018-09-08 stsp const struct got_error *err = NULL;
127 ad242220 2018-09-08 stsp struct got_object *obj = NULL;
128 ad242220 2018-09-08 stsp struct imsg imsg;
129 ad242220 2018-09-08 stsp struct imsgbuf ibuf;
130 ad242220 2018-09-08 stsp size_t datalen;
131 d5c81d44 2021-07-08 stsp struct got_object_id expected_id;
133 99437157 2018-11-11 stsp signal(SIGINT, catch_sigint);
135 ad242220 2018-09-08 stsp imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
137 2ff12563 2018-09-15 stsp #ifndef PROFILE
138 ad242220 2018-09-08 stsp /* revoke access to most system calls */
139 ad242220 2018-09-08 stsp if (pledge("stdio recvfd", NULL) == -1) {
140 638f9024 2019-05-13 stsp err = got_error_from_errno("pledge");
141 ad242220 2018-09-08 stsp got_privsep_send_error(&ibuf, err);
147 99437157 2018-11-11 stsp if (sigint_received) {
148 99437157 2018-11-11 stsp err = got_error(GOT_ERR_CANCELLED);
152 ad242220 2018-09-08 stsp err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
154 876c234b 2018-09-10 stsp if (err->code == GOT_ERR_PRIVSEP_PIPE)
155 ad242220 2018-09-08 stsp err = NULL;
159 ad242220 2018-09-08 stsp if (imsg.hdr.type == GOT_IMSG_STOP)
162 59d1e4a0 2021-03-10 stsp if (imsg.hdr.type != GOT_IMSG_OBJECT_REQUEST &&
163 59d1e4a0 2021-03-10 stsp imsg.hdr.type != GOT_IMSG_RAW_OBJECT_REQUEST) {
164 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
168 ad242220 2018-09-08 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
169 d5c81d44 2021-07-08 stsp if (datalen != sizeof(expected_id)) {
170 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
173 d5c81d44 2021-07-08 stsp memcpy(&expected_id, imsg.data, sizeof(expected_id));
175 59d1e4a0 2021-03-10 stsp if (imsg.fd == -1) {
176 59d1e4a0 2021-03-10 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
180 1785f84a 2018-12-23 stsp err = got_object_read_header(&obj, imsg.fd);
184 59d1e4a0 2021-03-10 stsp if (imsg.hdr.type == GOT_IMSG_RAW_OBJECT_REQUEST) {
185 59d1e4a0 2021-03-10 stsp struct imsg imsg_outfd;
187 59d1e4a0 2021-03-10 stsp err = got_privsep_recv_imsg(&imsg_outfd, &ibuf, 0);
189 59d1e4a0 2021-03-10 stsp if (imsg_outfd.hdr.len == 0)
190 59d1e4a0 2021-03-10 stsp err = NULL;
194 59d1e4a0 2021-03-10 stsp if (imsg_outfd.hdr.type == GOT_IMSG_STOP) {
195 59d1e4a0 2021-03-10 stsp imsg_free(&imsg_outfd);
199 59d1e4a0 2021-03-10 stsp if (imsg_outfd.hdr.type != GOT_IMSG_RAW_OBJECT_OUTFD) {
200 59d1e4a0 2021-03-10 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
201 59d1e4a0 2021-03-10 stsp imsg_free(&imsg_outfd);
205 59d1e4a0 2021-03-10 stsp datalen = imsg_outfd.hdr.len - IMSG_HEADER_SIZE;
206 59d1e4a0 2021-03-10 stsp if (datalen != 0) {
207 59d1e4a0 2021-03-10 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
208 59d1e4a0 2021-03-10 stsp imsg_free(&imsg_outfd);
211 59d1e4a0 2021-03-10 stsp if (imsg_outfd.fd == -1) {
212 59d1e4a0 2021-03-10 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
213 59d1e4a0 2021-03-10 stsp imsg_free(&imsg_outfd);
216 d5c81d44 2021-07-08 stsp err = send_raw_obj(&ibuf, obj, &expected_id,
217 d5c81d44 2021-07-08 stsp imsg.fd, imsg_outfd.fd);
218 59d1e4a0 2021-03-10 stsp imsg.fd = -1; /* imsg.fd is owned by send_raw_obj() */
219 e5ad7365 2021-05-20 stsp if (close(imsg_outfd.fd) == -1 && err == NULL)
220 e5ad7365 2021-05-20 stsp err = got_error_from_errno("close");
221 59d1e4a0 2021-03-10 stsp imsg_free(&imsg_outfd);
225 59d1e4a0 2021-03-10 stsp err = got_privsep_send_obj(&ibuf, obj);
227 59d1e4a0 2021-03-10 stsp if (imsg.fd != -1 && close(imsg.fd) == -1 && err == NULL)
228 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
229 ad242220 2018-09-08 stsp imsg_free(&imsg);
231 ad242220 2018-09-08 stsp got_object_close(obj);
236 ad242220 2018-09-08 stsp imsg_clear(&ibuf);
238 80d5f134 2018-11-11 stsp if(!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
239 80d5f134 2018-11-11 stsp fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
240 99437157 2018-11-11 stsp got_privsep_send_error(&ibuf, err);
243 08578a35 2021-01-22 stsp if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
244 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
245 ad242220 2018-09-08 stsp return err ? 1 : 0;
