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Date:: Thu Feb 23 18:51:38 2023 UTC
Message:: add some helper functions to compute hashes This adds a set of functions to abstract over SHA1Init, SHA1Update, SHA1Final, their respective SHA256 variants and how to compare digests. Replace all the SHA1*() usage with the new APIs. It's a preparatory step for sha256 handling. ok stsp@
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  1 93658fb9 2020-03-18 stsp /*
  2 93658fb9 2020-03-18 stsp  * Copyright (c) 2019 Ori Bernstein <ori@openbsd.org>
  3 668a20f6 2020-03-18 stsp  * Copyright (c) 2020 Stefan Sperling <stsp@openbsd.org>
  4 93658fb9 2020-03-18 stsp  *
  5 93658fb9 2020-03-18 stsp  * Permission to use, copy, modify, and distribute this software for any
  6 93658fb9 2020-03-18 stsp  * purpose with or without fee is hereby granted, provided that the above
  7 93658fb9 2020-03-18 stsp  * copyright notice and this permission notice appear in all copies.
  8 93658fb9 2020-03-18 stsp  *
  9 93658fb9 2020-03-18 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 10 93658fb9 2020-03-18 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 11 93658fb9 2020-03-18 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 12 93658fb9 2020-03-18 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 13 93658fb9 2020-03-18 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 14 93658fb9 2020-03-18 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 15 93658fb9 2020-03-18 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 16 93658fb9 2020-03-18 stsp  */
 17 93658fb9 2020-03-18 stsp 
 18 93658fb9 2020-03-18 stsp #include <sys/types.h>
 19 0136599f 2022-10-20 stsp #include <sys/queue.h>
 20 2e5a6fad 2020-03-18 stsp #include <sys/mman.h>
 21 0136599f 2022-10-20 stsp #include <sys/uio.h>
 22 93658fb9 2020-03-18 stsp 
 23 0136599f 2022-10-20 stsp #include <sha1.h>
 24 5822e79e 2023-02-23 op #include <sha2.h>
 25 93658fb9 2020-03-18 stsp #include <stdint.h>
 26 93658fb9 2020-03-18 stsp #include <stdio.h>
 27 93658fb9 2020-03-18 stsp #include <stdlib.h>
 28 93658fb9 2020-03-18 stsp #include <string.h>
 29 0136599f 2022-10-20 stsp #include <imsg.h>
 30 0136599f 2022-10-20 stsp #include <limits.h>
 31 0136599f 2022-10-20 stsp #include <time.h>
 32 81a12da5 2020-09-09 naddy #include <unistd.h>
 33 93658fb9 2020-03-18 stsp 
 34 93658fb9 2020-03-18 stsp #include "got_error.h"
 35 93658fb9 2020-03-18 stsp #include "got_object.h"
 36 93658fb9 2020-03-18 stsp 
 37 93658fb9 2020-03-18 stsp #include "got_lib_delta.h"
 38 0136599f 2022-10-20 stsp #include "got_lib_delta_cache.h"
 39 ae25a666 2023-02-23 op #include "got_lib_hash.h"
 40 93658fb9 2020-03-18 stsp #include "got_lib_object.h"
 41 93658fb9 2020-03-18 stsp #include "got_lib_privsep.h"
 42 d0f1e2f1 2022-02-23 stsp #include "got_lib_ratelimit.h"
 43 0136599f 2022-10-20 stsp #include "got_lib_pack.h"
 44 0136599f 2022-10-20 stsp #include "got_lib_pack_index.h"
 45 93658fb9 2020-03-18 stsp 
 46 d582f26c 2020-03-18 stsp #ifndef nitems
 47 d582f26c 2020-03-18 stsp #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
 48 d582f26c 2020-03-18 stsp #endif
 49 d582f26c 2020-03-18 stsp 
 50 668a20f6 2020-03-18 stsp static const struct got_error *
 51 9316cc27 2022-10-20 stsp send_index_pack_progress(void *arg, uint32_t nobj_total, uint32_t nobj_indexed,
 52 9316cc27 2022-10-20 stsp     uint32_t nobj_loose, uint32_t nobj_resolved)
 53 93658fb9 2020-03-18 stsp {
 54 0136599f 2022-10-20 stsp 	struct imsgbuf *ibuf = arg;
 55 e70bf110 2020-03-22 stsp 	struct got_imsg_index_pack_progress iprogress;
 56 d0f1e2f1 2022-02-23 stsp 
 57 e70bf110 2020-03-22 stsp 	iprogress.nobj_total = nobj_total;
 58 e70bf110 2020-03-22 stsp 	iprogress.nobj_indexed = nobj_indexed;
 59 e70bf110 2020-03-22 stsp 	iprogress.nobj_loose = nobj_loose;
 60 e70bf110 2020-03-22 stsp 	iprogress.nobj_resolved = nobj_resolved;
 61 e70bf110 2020-03-22 stsp 
 62 e70bf110 2020-03-22 stsp 	if (imsg_compose(ibuf, GOT_IMSG_IDXPACK_PROGRESS, 0, 0, -1,
 63 e70bf110 2020-03-22 stsp 	    &iprogress, sizeof(iprogress)) == -1)
 64 e70bf110 2020-03-22 stsp 		return got_error_from_errno("imsg_compose IDXPACK_PROGRESS");
 65 e70bf110 2020-03-22 stsp 
 66 e70bf110 2020-03-22 stsp 	return got_privsep_flush_imsg(ibuf);
 67 e70bf110 2020-03-22 stsp }
 68 e70bf110 2020-03-22 stsp 
 69 e70bf110 2020-03-22 stsp static const struct got_error *
 70 e70bf110 2020-03-22 stsp send_index_pack_done(struct imsgbuf *ibuf)
 71 e70bf110 2020-03-22 stsp {
 72 e70bf110 2020-03-22 stsp 	if (imsg_compose(ibuf, GOT_IMSG_IDXPACK_DONE, 0, 0, -1, NULL, 0) == -1)
 73 e70bf110 2020-03-22 stsp 		return got_error_from_errno("imsg_compose FETCH");
 74 e70bf110 2020-03-22 stsp 	return got_privsep_flush_imsg(ibuf);
 75 950de2cd 2020-03-18 stsp }
 76 950de2cd 2020-03-18 stsp 
 77 e70bf110 2020-03-22 stsp 
 78 93658fb9 2020-03-18 stsp int
 79 93658fb9 2020-03-18 stsp main(int argc, char **argv)
 80 93658fb9 2020-03-18 stsp {
 81 668a20f6 2020-03-18 stsp 	const struct got_error *err = NULL, *close_err;
 82 93658fb9 2020-03-18 stsp 	struct imsgbuf ibuf;
 83 93658fb9 2020-03-18 stsp 	struct imsg imsg;
 84 6059809a 2020-12-17 stsp 	size_t i;
 85 6059809a 2020-12-17 stsp 	int idxfd = -1, tmpfd = -1;
 86 d582f26c 2020-03-18 stsp 	FILE *tmpfiles[3];
 87 668a20f6 2020-03-18 stsp 	struct got_pack pack;
 88 668a20f6 2020-03-18 stsp 	uint8_t pack_hash[SHA1_DIGEST_LENGTH];
 89 668a20f6 2020-03-18 stsp 	off_t packfile_size;
 90 713d6e11 2022-10-20 stsp 	struct got_ratelimit rl;
 91 668a20f6 2020-03-18 stsp #if 0
 92 668a20f6 2020-03-18 stsp 	static int attached;
 93 668a20f6 2020-03-18 stsp 	while (!attached)
 94 668a20f6 2020-03-18 stsp 		sleep(1);
 95 668a20f6 2020-03-18 stsp #endif
 96 93658fb9 2020-03-18 stsp 
 97 713d6e11 2022-10-20 stsp 	got_ratelimit_init(&rl, 0, 500);
 98 713d6e11 2022-10-20 stsp 
 99 d582f26c 2020-03-18 stsp 	for (i = 0; i < nitems(tmpfiles); i++)
100 d582f26c 2020-03-18 stsp 		tmpfiles[i] = NULL;
101 d582f26c 2020-03-18 stsp 
102 668a20f6 2020-03-18 stsp 	memset(&pack, 0, sizeof(pack));
103 668a20f6 2020-03-18 stsp 	pack.fd = -1;
104 dac5c75e 2022-06-04 stsp 	err = got_delta_cache_alloc(&pack.delta_cache);
105 dac5c75e 2022-06-04 stsp 	if (err)
106 93658fb9 2020-03-18 stsp 		goto done;
107 668a20f6 2020-03-18 stsp 
108 668a20f6 2020-03-18 stsp 	imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
109 861f3006 2020-03-18 stsp #ifndef PROFILE
110 861f3006 2020-03-18 stsp 	/* revoke access to most system calls */
111 861f3006 2020-03-18 stsp 	if (pledge("stdio recvfd", NULL) == -1) {
112 861f3006 2020-03-18 stsp 		err = got_error_from_errno("pledge");
113 861f3006 2020-03-18 stsp 		got_privsep_send_error(&ibuf, err);
114 861f3006 2020-03-18 stsp 		return 1;
115 861f3006 2020-03-18 stsp 	}
116 861f3006 2020-03-18 stsp #endif
117 668a20f6 2020-03-18 stsp 	err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
118 668a20f6 2020-03-18 stsp 	if (err)
119 668a20f6 2020-03-18 stsp 		goto done;
120 93658fb9 2020-03-18 stsp 	if (imsg.hdr.type == GOT_IMSG_STOP)
121 93658fb9 2020-03-18 stsp 		goto done;
122 93658fb9 2020-03-18 stsp 	if (imsg.hdr.type != GOT_IMSG_IDXPACK_REQUEST) {
123 93658fb9 2020-03-18 stsp 		err = got_error(GOT_ERR_PRIVSEP_MSG);
124 93658fb9 2020-03-18 stsp 		goto done;
125 93658fb9 2020-03-18 stsp 	}
126 668a20f6 2020-03-18 stsp 	if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(pack_hash)) {
127 93658fb9 2020-03-18 stsp 		err = got_error(GOT_ERR_PRIVSEP_LEN);
128 93658fb9 2020-03-18 stsp 		goto done;
129 93658fb9 2020-03-18 stsp 	}
130 668a20f6 2020-03-18 stsp 	memcpy(pack_hash, imsg.data, sizeof(pack_hash));
131 668a20f6 2020-03-18 stsp 	pack.fd = imsg.fd;
132 93658fb9 2020-03-18 stsp 
133 668a20f6 2020-03-18 stsp 	err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
134 668a20f6 2020-03-18 stsp 	if (err)
135 93658fb9 2020-03-18 stsp 		goto done;
136 93658fb9 2020-03-18 stsp 	if (imsg.hdr.type == GOT_IMSG_STOP)
137 93658fb9 2020-03-18 stsp 		goto done;
138 73ab1060 2020-03-18 stsp 	if (imsg.hdr.type != GOT_IMSG_IDXPACK_OUTFD) {
139 93658fb9 2020-03-18 stsp 		err = got_error(GOT_ERR_PRIVSEP_MSG);
140 93658fb9 2020-03-18 stsp 		goto done;
141 93658fb9 2020-03-18 stsp 	}
142 93658fb9 2020-03-18 stsp 	if (imsg.hdr.len - IMSG_HEADER_SIZE != 0) {
143 93658fb9 2020-03-18 stsp 		err = got_error(GOT_ERR_PRIVSEP_LEN);
144 93658fb9 2020-03-18 stsp 		goto done;
145 93658fb9 2020-03-18 stsp 	}
146 93658fb9 2020-03-18 stsp 	idxfd = imsg.fd;
147 4788f1ce 2020-03-18 stsp 
148 d582f26c 2020-03-18 stsp 	for (i = 0; i < nitems(tmpfiles); i++) {
149 d582f26c 2020-03-18 stsp 		err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
150 d582f26c 2020-03-18 stsp 		if (err)
151 d582f26c 2020-03-18 stsp 			goto done;
152 d582f26c 2020-03-18 stsp 		if (imsg.hdr.type == GOT_IMSG_STOP)
153 d582f26c 2020-03-18 stsp 			goto done;
154 d582f26c 2020-03-18 stsp 		if (imsg.hdr.type != GOT_IMSG_TMPFD) {
155 d582f26c 2020-03-18 stsp 			err = got_error(GOT_ERR_PRIVSEP_MSG);
156 d582f26c 2020-03-18 stsp 			goto done;
157 d582f26c 2020-03-18 stsp 		}
158 d582f26c 2020-03-18 stsp 		if (imsg.hdr.len - IMSG_HEADER_SIZE != 0) {
159 d582f26c 2020-03-18 stsp 			err = got_error(GOT_ERR_PRIVSEP_LEN);
160 d582f26c 2020-03-18 stsp 			goto done;
161 d582f26c 2020-03-18 stsp 		}
162 d582f26c 2020-03-18 stsp 		tmpfd = imsg.fd;
163 d582f26c 2020-03-18 stsp 		tmpfiles[i] = fdopen(tmpfd, "w+");
164 d582f26c 2020-03-18 stsp 		if (tmpfiles[i] == NULL) {
165 d582f26c 2020-03-18 stsp 			err = got_error_from_errno("fdopen");
166 d582f26c 2020-03-18 stsp 			goto done;
167 d582f26c 2020-03-18 stsp 		}
168 d582f26c 2020-03-18 stsp 		tmpfd = -1;
169 4788f1ce 2020-03-18 stsp 	}
170 93658fb9 2020-03-18 stsp 
171 668a20f6 2020-03-18 stsp 	if (lseek(pack.fd, 0, SEEK_END) == -1) {
172 668a20f6 2020-03-18 stsp 		err = got_error_from_errno("lseek");
173 668a20f6 2020-03-18 stsp 		goto done;
174 668a20f6 2020-03-18 stsp 	}
175 668a20f6 2020-03-18 stsp 	packfile_size = lseek(pack.fd, 0, SEEK_CUR);
176 668a20f6 2020-03-18 stsp 	if (packfile_size == -1) {
177 668a20f6 2020-03-18 stsp 		err = got_error_from_errno("lseek");
178 668a20f6 2020-03-18 stsp 		goto done;
179 668a20f6 2020-03-18 stsp 	}
180 ad4cc361 2022-10-27 op 	pack.filesize = packfile_size;
181 668a20f6 2020-03-18 stsp 
182 668a20f6 2020-03-18 stsp 	if (lseek(pack.fd, 0, SEEK_SET) == -1) {
183 668a20f6 2020-03-18 stsp 		err = got_error_from_errno("lseek");
184 668a20f6 2020-03-18 stsp 		goto done;
185 668a20f6 2020-03-18 stsp 	}
186 668a20f6 2020-03-18 stsp 
187 2e5a6fad 2020-03-18 stsp #ifndef GOT_PACK_NO_MMAP
188 1c28a361 2022-10-25 op 	if (pack.filesize > 0 && pack.filesize <= SIZE_MAX) {
189 1c28a361 2022-10-25 op 		pack.map = mmap(NULL, pack.filesize, PROT_READ, MAP_PRIVATE,
190 1c28a361 2022-10-25 op 		    pack.fd, 0);
191 1c28a361 2022-10-25 op 		if (pack.map == MAP_FAILED)
192 1c28a361 2022-10-25 op 			pack.map = NULL; /* fall back to read(2) */
193 1c28a361 2022-10-25 op 	}
194 2e5a6fad 2020-03-18 stsp #endif
195 713d6e11 2022-10-20 stsp 	err = got_pack_index(&pack, idxfd, tmpfiles[0], tmpfiles[1],
196 713d6e11 2022-10-20 stsp 	    tmpfiles[2], pack_hash, send_index_pack_progress, &ibuf, &rl);
197 93658fb9 2020-03-18 stsp done:
198 668a20f6 2020-03-18 stsp 	close_err = got_pack_close(&pack);
199 668a20f6 2020-03-18 stsp 	if (close_err && err == NULL)
200 668a20f6 2020-03-18 stsp 		err = close_err;
201 668a20f6 2020-03-18 stsp 	if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
202 668a20f6 2020-03-18 stsp 		err = got_error_from_errno("close");
203 4788f1ce 2020-03-18 stsp 	if (tmpfd != -1 && close(tmpfd) == -1 && err == NULL)
204 4788f1ce 2020-03-18 stsp 		err = got_error_from_errno("close");
205 d582f26c 2020-03-18 stsp 	for (i = 0; i < nitems(tmpfiles); i++) {
206 d582f26c 2020-03-18 stsp 		if (tmpfiles[i] != NULL && fclose(tmpfiles[i]) == EOF &&
207 d582f26c 2020-03-18 stsp 		    err == NULL)
208 07965a0d 2021-10-15 stsp 			err = got_error_from_errno("fclose");
209 d582f26c 2020-03-18 stsp 	}
210 668a20f6 2020-03-18 stsp 
211 668a20f6 2020-03-18 stsp 	if (err == NULL)
212 e70bf110 2020-03-22 stsp 		err = send_index_pack_done(&ibuf);
213 668a20f6 2020-03-18 stsp 	if (err) {
214 668a20f6 2020-03-18 stsp 		got_privsep_send_error(&ibuf, err);
215 93658fb9 2020-03-18 stsp 		fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
216 93658fb9 2020-03-18 stsp 		got_privsep_send_error(&ibuf, err);
217 668a20f6 2020-03-18 stsp 		exit(1);
218 93658fb9 2020-03-18 stsp 	}
219 93658fb9 2020-03-18 stsp 
220 93658fb9 2020-03-18 stsp 	exit(0);
221 93658fb9 2020-03-18 stsp }