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Blob

Date:: Sun Feb 12 11:16:21 2023 UTC
Message:: include sha2.h where sha1.h is included
Actions:: History | Blame | Raw File
1 /*
2  * Copyright (c) 2019 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/queue.h>
18 
19 #include <errno.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <sha1.h>
24 #include <sha2.h>
25 #include <zlib.h>
26 #include <time.h>
27 
28 #include "got_error.h"
29 #include "got_object.h"
30 #include "got_path.h"
31 
32 #include "got_lib_deflate.h"
33 #include "got_lib_poll.h"
34 
35 #ifndef MIN
36 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
37 #endif
38 
39 const struct got_error *
40 got_deflate_init(struct got_deflate_buf *zb, uint8_t *outbuf, size_t bufsize)
41 {
42 	const struct got_error *err = NULL;
43 	int zerr;
44 
45 	memset(zb, 0, sizeof(*zb));
46 
47 	zb->z.zalloc = Z_NULL;
48 	zb->z.zfree = Z_NULL;
49 	zerr = deflateInit(&zb->z, Z_DEFAULT_COMPRESSION);
50 	if (zerr != Z_OK) {
51 		if  (zerr == Z_ERRNO)
52 			return got_error_from_errno("deflateInit");
53 		if  (zerr == Z_MEM_ERROR) {
54 			errno = ENOMEM;
55 			return got_error_from_errno("deflateInit");
56 		}
57 		return got_error(GOT_ERR_COMPRESSION);
58 	}
59 
60 	zb->inlen = zb->outlen = bufsize;
61 
62 	zb->inbuf = calloc(1, zb->inlen);
63 	if (zb->inbuf == NULL) {
64 		err = got_error_from_errno("calloc");
65 		goto done;
66 	}
67 
68 	zb->flags = 0;
69 	if (outbuf == NULL) {
70 		zb->outbuf = calloc(1, zb->outlen);
71 		if (zb->outbuf == NULL) {
72 			err = got_error_from_errno("calloc");
73 			goto done;
74 		}
75 		zb->flags |= GOT_DEFLATE_F_OWN_OUTBUF;
76 	} else
77 		zb->outbuf = outbuf;
78 done:
79 	if (err)
80 		got_deflate_end(zb);
81 	return err;
82 }
83 
84 static void
85 csum_output(struct got_deflate_checksum *csum, const uint8_t *buf, size_t len)
86 {
87 	if (csum->output_crc)
88 		*csum->output_crc = crc32(*csum->output_crc, buf, len);
89 
90 	if (csum->output_sha1)
91 		SHA1Update(csum->output_sha1, buf, len);
92 }
93 
94 const struct got_error *
95 got_deflate_read(struct got_deflate_buf *zb, FILE *f, off_t len,
96     size_t *outlenp, off_t *consumed)
97 {
98 	size_t last_total_out = zb->z.total_out;
99 	z_stream *z = &zb->z;
100 	int ret = Z_ERRNO;
101 
102 	z->next_out = zb->outbuf;
103 	z->avail_out = zb->outlen;
104 
105 	*outlenp = 0;
106 	*consumed = 0;
107 	do {
108 		size_t last_total_in = z->total_in;
109 		if (z->avail_in == 0) {
110 			size_t n = 0;
111 			if (*consumed < len) {
112 				n = fread(zb->inbuf, 1,
113 				    MIN(zb->inlen, len - *consumed), f);
114 			}
115 			if (n == 0) {
116 				if (ferror(f))
117 					return got_ferror(f, GOT_ERR_IO);
118 				/* EOF */
119 				ret = deflate(z, Z_FINISH);
120 				break;
121 			}
122 			z->next_in = zb->inbuf;
123 			z->avail_in = n;
124 		}
125 		ret = deflate(z, Z_NO_FLUSH);
126 		*consumed += z->total_in - last_total_in;
127 	} while (ret == Z_OK && z->avail_out > 0);
128 
129 	if (ret == Z_OK) {
130 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
131 	} else {
132 		if (ret != Z_STREAM_END)
133 			return got_error(GOT_ERR_COMPRESSION);
134 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
135 	}
136 
137 	*outlenp = z->total_out - last_total_out;
138 	return NULL;
139 }
140 
141 static const struct got_error *
142 deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
143     size_t len, size_t *outlenp, size_t *consumed, int flush_on_eof)
144 {
145 	z_stream *z = &zb->z;
146 	size_t last_total_out = z->total_out;
147 	int ret = Z_ERRNO;
148 
149 	z->next_out = zb->outbuf;
150 	z->avail_out = zb->outlen;
151 
152 	*outlenp = 0;
153 	*consumed = 0;
154 	do {
155 		size_t last_total_in = z->total_in;
156 		if (z->avail_in == 0) {
157 			z->next_in = map + offset + *consumed;
158 			if (len - *consumed > UINT_MAX)
159 				z->avail_in = UINT_MAX;
160 			else
161 				z->avail_in = len - *consumed;
162 			if (z->avail_in == 0) {
163 				/* EOF */
164 				if (flush_on_eof)
165 					ret = deflate(z, Z_FINISH);
166 				break;
167 			}
168 		}
169 		ret = deflate(z, Z_NO_FLUSH);
170 		*consumed += z->total_in - last_total_in;
171 	} while (ret == Z_OK && z->avail_out > 0);
172 
173 	if (ret == Z_OK) {
174 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
175 	} else {
176 		if (ret != Z_STREAM_END)
177 			return got_error(GOT_ERR_COMPRESSION);
178 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
179 	}
180 
181 	*outlenp = z->total_out - last_total_out;
182 	return NULL;
183 }
184 
185 const struct got_error *
186 got_deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
187     size_t len, size_t *outlenp, size_t *consumed)
188 {
189 	return deflate_read_mmap(zb, map, offset, len, outlenp, consumed, 1);
190 }
191 
192 const struct got_error *
193 got_deflate_flush(struct got_deflate_buf *zb, FILE *outfile,
194     struct got_deflate_checksum *csum, off_t *outlenp)
195 {
196 	int ret;
197 	size_t n;
198 	z_stream *z = &zb->z;
199 
200 	if (z->avail_in != 0)
201 		return got_error_msg(GOT_ERR_COMPRESSION,
202 		    "cannot flush zb with pending input data");
203 
204 	do {
205 		size_t avail, last_total_out = zb->z.total_out;
206 
207 		z->next_out = zb->outbuf;
208 		z->avail_out = zb->outlen;
209 
210 		ret = deflate(z, Z_FINISH);
211 		if (ret != Z_STREAM_END && ret != Z_OK)
212 			return got_error(GOT_ERR_COMPRESSION);
213 
214 		avail = z->total_out - last_total_out;
215 		if (avail > 0) {
216 			n = fwrite(zb->outbuf, avail, 1, outfile);
217 			if (n != 1)
218 				return got_ferror(outfile, GOT_ERR_IO);
219 			if (csum)
220 				csum_output(csum, zb->outbuf, avail);
221 			if (outlenp)
222 				*outlenp += avail;
223 		}
224 	} while (ret != Z_STREAM_END);
225 
226 	zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
227 	return NULL;
228 }
229 
230 void
231 got_deflate_end(struct got_deflate_buf *zb)
232 {
233 	free(zb->inbuf);
234 	if (zb->flags & GOT_DEFLATE_F_OWN_OUTBUF)
235 		free(zb->outbuf);
236 	deflateEnd(&zb->z);
237 }
238 
239 const struct got_error *
240 got_deflate_to_fd(off_t *outlen, FILE *infile, off_t len, int outfd,
241     struct got_deflate_checksum *csum)
242 {
243 	const struct got_error *err;
244 	size_t avail;
245 	off_t consumed;
246 	struct got_deflate_buf zb;
247 
248 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
249 	if (err)
250 		goto done;
251 
252 	*outlen = 0;
253 
254 	do {
255 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
256 		if (err)
257 			goto done;
258 		len -= consumed;
259 		if (avail > 0) {
260 			err = got_poll_write_full(outfd, zb.outbuf, avail);
261 			if (err)
262 				goto done;
263 			if (csum)
264 				csum_output(csum, zb.outbuf, avail);
265 			*outlen += avail;
266 		}
267 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
268 
269 done:
270 	got_deflate_end(&zb);
271 	return err;
272 }
273 
274 const struct got_error *
275 got_deflate_to_fd_mmap(off_t *outlen, uint8_t *map, size_t offset,
276     size_t len, int outfd, struct got_deflate_checksum *csum)
277 {
278 	const struct got_error *err;
279 	size_t avail, consumed;
280 	struct got_deflate_buf zb;
281 
282 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
283 	if (err)
284 		goto done;
285 
286 	*outlen = 0;
287 	do {
288 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
289 		    &consumed);
290 		if (err)
291 			goto done;
292 		offset += consumed;
293 		len -= consumed;
294 		if (avail > 0) {
295 			err = got_poll_write_full(outfd, zb.outbuf, avail);
296 			if (err)
297 				goto done;
298 			if (csum)
299 				csum_output(csum, zb.outbuf, avail);
300 			*outlen += avail;
301 		}
302 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
303 
304 done:
305 	got_deflate_end(&zb);
306 	return err;
307 }
308 
309 const struct got_error *
310 got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
311     FILE *outfile, struct got_deflate_checksum *csum)
312 {
313 	const struct got_error *err;
314 	size_t avail;
315 	off_t consumed;
316 	struct got_deflate_buf zb;
317 
318 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
319 	if (err)
320 		goto done;
321 
322 	*outlen = 0;
323 
324 	do {
325 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
326 		if (err)
327 			goto done;
328 		len -= consumed;
329 		if (avail > 0) {
330 			size_t n;
331 			n = fwrite(zb.outbuf, avail, 1, outfile);
332 			if (n != 1) {
333 				err = got_ferror(outfile, GOT_ERR_IO);
334 				goto done;
335 			}
336 			if (csum)
337 				csum_output(csum, zb.outbuf, avail);
338 			*outlen += avail;
339 		}
340 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
341 
342 done:
343 	got_deflate_end(&zb);
344 	return err;
345 }
346 
347 const struct got_error *
348 got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
349     size_t len, FILE *outfile, struct got_deflate_checksum *csum)
350 {
351 	const struct got_error *err;
352 	size_t avail, consumed;
353 	struct got_deflate_buf zb;
354 
355 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
356 	if (err)
357 		goto done;
358 
359 	*outlen = 0;
360 	do {
361 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
362 		    &consumed);
363 		if (err)
364 			goto done;
365 		offset += consumed;
366 		len -= consumed;
367 		if (avail > 0) {
368 			size_t n;
369 			n = fwrite(zb.outbuf, avail, 1, outfile);
370 			if (n != 1) {
371 				err = got_ferror(outfile, GOT_ERR_IO);
372 				goto done;
373 			}
374 			if (csum)
375 				csum_output(csum, zb.outbuf, avail);
376 			*outlen += avail;
377 		}
378 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
379 
380 done:
381 	got_deflate_end(&zb);
382 	return err;
383 }
384 
385 const struct got_error *
386 got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
387     uint8_t *map, size_t offset, size_t len, FILE *outfile,
388     struct got_deflate_checksum *csum)
389 {
390 	const struct got_error *err;
391 	size_t avail, consumed;
392 
393 	do {
394 		err = deflate_read_mmap(zb, map, offset, len, &avail,
395 		    &consumed, 0);
396 		if (err)
397 			break;
398 		offset += consumed;
399 		len -= consumed;
400 		if (avail > 0) {
401 			size_t n;
402 			n = fwrite(zb->outbuf, avail, 1, outfile);
403 			if (n != 1) {
404 				err = got_ferror(outfile, GOT_ERR_IO);
405 				break;
406 			}
407 			if (csum)
408 				csum_output(csum, zb->outbuf, avail);
409 			if (outlen)
410 				*outlen += avail;
411 		}
412 	} while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
413 
414 	return err;
415 }
416 
417 const struct got_error *
418 got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
419     size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
420     size_t offset, size_t len)
421 {
422 	const struct got_error *err;
423 	size_t avail, consumed;
424 	struct got_deflate_buf zb;
425 	void *newbuf;
426 	size_t nbuf = 1;
427 
428 	if (outbuf) {
429 		*outbuf = malloc(GOT_DEFLATE_BUFSIZE);
430 		if (*outbuf == NULL)
431 			return got_error_from_errno("malloc");
432 		err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
433 		if (err) {
434 			free(*outbuf);
435 			*outbuf = NULL;
436 			return err;
437 		}
438 	} else {
439 		err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
440 		if (err)
441 			return err;
442 	}
443 
444 	*outlen = 0;
445 	if (consumed_total)
446 		*consumed_total = 0;
447 	do {
448 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
449 		    &consumed);
450 		if (err)
451 			goto done;
452 		offset += consumed;
453 		if (consumed_total)
454 			*consumed_total += consumed;
455 		len -= consumed;
456 		if (avail > 0 && csum)
457 			csum_output(csum, zb.outbuf, avail);
458 		*outlen += avail;
459 		if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
460 			newbuf = reallocarray(*outbuf, ++nbuf,
461 			    GOT_DEFLATE_BUFSIZE);
462 			if (newbuf == NULL) {
463 				err = got_error_from_errno("reallocarray");
464 				free(*outbuf);
465 				*outbuf = NULL;
466 				*outlen = 0;
467 				goto done;
468 			}
469 			*outbuf = newbuf;
470 			zb.outbuf = newbuf + *outlen;
471 			zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
472 		}
473 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
474 done:
475 	got_deflate_end(&zb);
476 	return err;
477 }