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>
21 ad242220 2018-09-08 stsp #include <sys/limits.h>
22 876c234b 2018-09-10 stsp #include <sys/syslimits.h>
24 ad242220 2018-09-08 stsp #include <stdint.h>
25 ad242220 2018-09-08 stsp #include <imsg.h>
26 99437157 2018-11-11 stsp #include <signal.h>
27 ad242220 2018-09-08 stsp #include <stdio.h>
28 ad242220 2018-09-08 stsp #include <stdlib.h>
29 ad242220 2018-09-08 stsp #include <string.h>
30 ad242220 2018-09-08 stsp #include <sha1.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_privsep.h"
41 ad242220 2018-09-08 stsp #ifndef nitems
42 ad242220 2018-09-08 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
45 ad242220 2018-09-08 stsp #define GOT_OBJ_TAG_COMMIT "commit"
46 ad242220 2018-09-08 stsp #define GOT_OBJ_TAG_TREE "tree"
47 ad242220 2018-09-08 stsp #define GOT_OBJ_TAG_BLOB "blob"
48 f4a881ce 2018-11-17 stsp #define GOT_OBJ_TAG_TAG "tag"
50 99437157 2018-11-11 stsp static volatile sig_atomic_t sigint_received;
53 99437157 2018-11-11 stsp catch_sigint(int signo)
55 99437157 2018-11-11 stsp sigint_received = 1;
58 ad242220 2018-09-08 stsp static const struct got_error *
59 ad242220 2018-09-08 stsp parse_object_header(struct got_object **obj, char *buf, size_t len)
61 ad242220 2018-09-08 stsp const char *obj_tags[] = {
62 ad242220 2018-09-08 stsp GOT_OBJ_TAG_COMMIT,
63 ad242220 2018-09-08 stsp GOT_OBJ_TAG_TREE,
64 f4a881ce 2018-11-17 stsp GOT_OBJ_TAG_BLOB,
65 f4a881ce 2018-11-17 stsp GOT_OBJ_TAG_TAG,
67 ad242220 2018-09-08 stsp const int obj_types[] = {
68 ad242220 2018-09-08 stsp GOT_OBJ_TYPE_COMMIT,
69 ad242220 2018-09-08 stsp GOT_OBJ_TYPE_TREE,
70 ad242220 2018-09-08 stsp GOT_OBJ_TYPE_BLOB,
71 f4a881ce 2018-11-17 stsp GOT_OBJ_TYPE_TAG,
73 ad242220 2018-09-08 stsp int type = 0;
74 ad242220 2018-09-08 stsp size_t size = 0, hdrlen = 0;
76 ad242220 2018-09-08 stsp char *p = strchr(buf, '\0');
78 c945ec50 2018-11-17 stsp *obj = NULL;
80 ad242220 2018-09-08 stsp if (p == NULL)
81 ad242220 2018-09-08 stsp return got_error(GOT_ERR_BAD_OBJ_HDR);
83 ad242220 2018-09-08 stsp hdrlen = strlen(buf) + 1 /* '\0' */;
85 ad242220 2018-09-08 stsp for (i = 0; i < nitems(obj_tags); i++) {
86 ad242220 2018-09-08 stsp const char *tag = obj_tags[i];
87 ad242220 2018-09-08 stsp size_t tlen = strlen(tag);
88 ad242220 2018-09-08 stsp const char *errstr;
90 ad242220 2018-09-08 stsp if (strncmp(buf, tag, tlen) != 0)
93 ad242220 2018-09-08 stsp type = obj_types[i];
94 ad242220 2018-09-08 stsp if (len <= tlen)
95 ad242220 2018-09-08 stsp return got_error(GOT_ERR_BAD_OBJ_HDR);
96 ad242220 2018-09-08 stsp size = strtonum(buf + tlen, 0, LONG_MAX, &errstr);
97 ad242220 2018-09-08 stsp if (errstr != NULL)
98 ad242220 2018-09-08 stsp return got_error(GOT_ERR_BAD_OBJ_HDR);
102 ad242220 2018-09-08 stsp if (type == 0)
103 ad242220 2018-09-08 stsp return got_error(GOT_ERR_BAD_OBJ_HDR);
105 ad242220 2018-09-08 stsp *obj = calloc(1, sizeof(**obj));
106 ad242220 2018-09-08 stsp if (*obj == NULL)
107 ad242220 2018-09-08 stsp return got_error_from_errno();
108 ad242220 2018-09-08 stsp (*obj)->type = type;
109 ad242220 2018-09-08 stsp (*obj)->hdrlen = hdrlen;
110 ad242220 2018-09-08 stsp (*obj)->size = size;
111 ad242220 2018-09-08 stsp return NULL;
114 ad242220 2018-09-08 stsp static const struct got_error *
115 ad242220 2018-09-08 stsp read_object_header(struct got_object **obj, int fd)
117 ad242220 2018-09-08 stsp const struct got_error *err;
118 ad242220 2018-09-08 stsp struct got_zstream_buf zb;
120 ad242220 2018-09-08 stsp const size_t zbsize = 64;
121 ad242220 2018-09-08 stsp size_t outlen, totlen;
122 ad242220 2018-09-08 stsp int nbuf = 1;
124 c945ec50 2018-11-17 stsp *obj = NULL;
126 ad242220 2018-09-08 stsp buf = malloc(zbsize);
127 ad242220 2018-09-08 stsp if (buf == NULL)
128 ad242220 2018-09-08 stsp return got_error_from_errno();
130 ad242220 2018-09-08 stsp err = got_inflate_init(&zb, buf, zbsize);
132 ad242220 2018-09-08 stsp return err;
134 ad242220 2018-09-08 stsp totlen = 0;
136 ad242220 2018-09-08 stsp err = got_inflate_read_fd(&zb, fd, &outlen);
139 ad242220 2018-09-08 stsp if (outlen == 0)
141 ad242220 2018-09-08 stsp totlen += outlen;
142 ad242220 2018-09-08 stsp if (strchr(zb.outbuf, '\0') == NULL) {
143 ad242220 2018-09-08 stsp char *newbuf;
145 ad242220 2018-09-08 stsp newbuf = recallocarray(buf, nbuf - 1, nbuf, zbsize);
146 ad242220 2018-09-08 stsp if (newbuf == NULL) {
147 ad242220 2018-09-08 stsp err = got_error_from_errno();
150 ad242220 2018-09-08 stsp buf = newbuf;
151 ad242220 2018-09-08 stsp zb.outbuf = newbuf + totlen;
152 ad242220 2018-09-08 stsp zb.outlen = (nbuf * zbsize) - totlen;
154 ad242220 2018-09-08 stsp } while (strchr(zb.outbuf, '\0') == NULL);
156 ad242220 2018-09-08 stsp err = parse_object_header(obj, buf, totlen);
159 ad242220 2018-09-08 stsp got_inflate_end(&zb);
160 ad242220 2018-09-08 stsp return err;
165 ad242220 2018-09-08 stsp main(int argc, char *argv[])
167 ad242220 2018-09-08 stsp const struct got_error *err = NULL;
168 ad242220 2018-09-08 stsp struct got_object *obj = NULL;
169 ad242220 2018-09-08 stsp struct imsg imsg;
170 ad242220 2018-09-08 stsp struct imsgbuf ibuf;
171 ad242220 2018-09-08 stsp size_t datalen;
173 99437157 2018-11-11 stsp signal(SIGINT, catch_sigint);
175 ad242220 2018-09-08 stsp imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
177 2ff12563 2018-09-15 stsp #ifndef PROFILE
178 ad242220 2018-09-08 stsp /* revoke access to most system calls */
179 ad242220 2018-09-08 stsp if (pledge("stdio recvfd", NULL) == -1) {
180 ad242220 2018-09-08 stsp err = got_error_from_errno();
181 ad242220 2018-09-08 stsp got_privsep_send_error(&ibuf, err);
186 ad242220 2018-09-08 stsp while (1) {
187 99437157 2018-11-11 stsp if (sigint_received) {
188 99437157 2018-11-11 stsp err = got_error(GOT_ERR_CANCELLED);
192 ad242220 2018-09-08 stsp err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
194 876c234b 2018-09-10 stsp if (err->code == GOT_ERR_PRIVSEP_PIPE)
195 ad242220 2018-09-08 stsp err = NULL;
199 ad242220 2018-09-08 stsp if (imsg.hdr.type == GOT_IMSG_STOP)
202 ad242220 2018-09-08 stsp if (imsg.hdr.type != GOT_IMSG_OBJECT_REQUEST) {
203 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
207 ad242220 2018-09-08 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
208 ad242220 2018-09-08 stsp if (datalen != 0) {
209 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
213 ad242220 2018-09-08 stsp err = read_object_header(&obj, imsg.fd);
217 876c234b 2018-09-10 stsp err = got_privsep_send_obj(&ibuf, obj);
219 ad242220 2018-09-08 stsp close(imsg.fd);
220 ad242220 2018-09-08 stsp imsg_free(&imsg);
222 ad242220 2018-09-08 stsp got_object_close(obj);
227 ad242220 2018-09-08 stsp imsg_clear(&ibuf);
229 80d5f134 2018-11-11 stsp if(!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
230 80d5f134 2018-11-11 stsp fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
231 99437157 2018-11-11 stsp got_privsep_send_error(&ibuf, err);
234 ad242220 2018-09-08 stsp close(GOT_IMSG_FD_CHILD);
235 ad242220 2018-09-08 stsp return err ? 1 : 0;