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Date:: Tue Nov 8 09:20:45 2022 UTC
Message:: zero-initialize all of struct got_deflate_buf in got_deflate_init() Fixes a potential bogus free on error. got_deflate_end() relies on zb.flags to be initialized. It will try to free a bogus zb.outbuf pointer if zb.flags happens to set by uninitialized stack memory while we are calling got_deflate_end() in an error path.
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  1 2181e0c8 2019-03-19 stsp /*
  2 2181e0c8 2019-03-19 stsp  * Copyright (c) 2019 Stefan Sperling <stsp@openbsd.org>
  3 2181e0c8 2019-03-19 stsp  *
  4 2181e0c8 2019-03-19 stsp  * Permission to use, copy, modify, and distribute this software for any
  5 2181e0c8 2019-03-19 stsp  * purpose with or without fee is hereby granted, provided that the above
  6 2181e0c8 2019-03-19 stsp  * copyright notice and this permission notice appear in all copies.
  7 2181e0c8 2019-03-19 stsp  *
  8 2181e0c8 2019-03-19 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 2181e0c8 2019-03-19 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 2181e0c8 2019-03-19 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 2181e0c8 2019-03-19 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 2181e0c8 2019-03-19 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 2181e0c8 2019-03-19 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 2181e0c8 2019-03-19 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 2181e0c8 2019-03-19 stsp  */
 16 2181e0c8 2019-03-19 stsp 
 17 2181e0c8 2019-03-19 stsp #include <sys/queue.h>
 18 2181e0c8 2019-03-19 stsp 
 19 2181e0c8 2019-03-19 stsp #include <errno.h>
 20 2181e0c8 2019-03-19 stsp #include <stdio.h>
 21 2181e0c8 2019-03-19 stsp #include <stdlib.h>
 22 2181e0c8 2019-03-19 stsp #include <string.h>
 23 2181e0c8 2019-03-19 stsp #include <sha1.h>
 24 2181e0c8 2019-03-19 stsp #include <zlib.h>
 25 2181e0c8 2019-03-19 stsp #include <time.h>
 26 2181e0c8 2019-03-19 stsp 
 27 2181e0c8 2019-03-19 stsp #include "got_error.h"
 28 2181e0c8 2019-03-19 stsp #include "got_object.h"
 29 324d37e7 2019-05-11 stsp #include "got_path.h"
 30 2181e0c8 2019-03-19 stsp 
 31 2181e0c8 2019-03-19 stsp #include "got_lib_deflate.h"
 32 13b2bc37 2022-10-23 stsp #include "got_lib_poll.h"
 33 2181e0c8 2019-03-19 stsp 
 34 2181e0c8 2019-03-19 stsp #ifndef MIN
 35 2181e0c8 2019-03-19 stsp #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
 36 2181e0c8 2019-03-19 stsp #endif
 37 2181e0c8 2019-03-19 stsp 
 38 2181e0c8 2019-03-19 stsp const struct got_error *
 39 3b9e6fcf 2021-06-05 stsp got_deflate_init(struct got_deflate_buf *zb, uint8_t *outbuf, size_t bufsize)
 40 2181e0c8 2019-03-19 stsp {
 41 2181e0c8 2019-03-19 stsp 	const struct got_error *err = NULL;
 42 2181e0c8 2019-03-19 stsp 	int zerr;
 43 2181e0c8 2019-03-19 stsp 
 44 0fc5e229 2022-11-08 stsp 	memset(zb, 0, sizeof(*zb));
 45 2181e0c8 2019-03-19 stsp 
 46 2181e0c8 2019-03-19 stsp 	zb->z.zalloc = Z_NULL;
 47 2181e0c8 2019-03-19 stsp 	zb->z.zfree = Z_NULL;
 48 2181e0c8 2019-03-19 stsp 	zerr = deflateInit(&zb->z, Z_DEFAULT_COMPRESSION);
 49 2181e0c8 2019-03-19 stsp 	if (zerr != Z_OK) {
 50 2181e0c8 2019-03-19 stsp 		if  (zerr == Z_ERRNO)
 51 638f9024 2019-05-13 stsp 			return got_error_from_errno("deflateInit");
 52 2181e0c8 2019-03-19 stsp 		if  (zerr == Z_MEM_ERROR) {
 53 2181e0c8 2019-03-19 stsp 			errno = ENOMEM;
 54 638f9024 2019-05-13 stsp 			return got_error_from_errno("deflateInit");
 55 2181e0c8 2019-03-19 stsp 		}
 56 2181e0c8 2019-03-19 stsp 		return got_error(GOT_ERR_COMPRESSION);
 57 2181e0c8 2019-03-19 stsp 	}
 58 2181e0c8 2019-03-19 stsp 
 59 2181e0c8 2019-03-19 stsp 	zb->inlen = zb->outlen = bufsize;
 60 2181e0c8 2019-03-19 stsp 
 61 2181e0c8 2019-03-19 stsp 	zb->inbuf = calloc(1, zb->inlen);
 62 2181e0c8 2019-03-19 stsp 	if (zb->inbuf == NULL) {
 63 638f9024 2019-05-13 stsp 		err = got_error_from_errno("calloc");
 64 2181e0c8 2019-03-19 stsp 		goto done;
 65 2181e0c8 2019-03-19 stsp 	}
 66 2181e0c8 2019-03-19 stsp 
 67 2181e0c8 2019-03-19 stsp 	zb->flags = 0;
 68 2181e0c8 2019-03-19 stsp 	if (outbuf == NULL) {
 69 2181e0c8 2019-03-19 stsp 		zb->outbuf = calloc(1, zb->outlen);
 70 2181e0c8 2019-03-19 stsp 		if (zb->outbuf == NULL) {
 71 638f9024 2019-05-13 stsp 			err = got_error_from_errno("calloc");
 72 2181e0c8 2019-03-19 stsp 			goto done;
 73 2181e0c8 2019-03-19 stsp 		}
 74 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_OWN_OUTBUF;
 75 2181e0c8 2019-03-19 stsp 	} else
 76 2181e0c8 2019-03-19 stsp 		zb->outbuf = outbuf;
 77 2181e0c8 2019-03-19 stsp done:
 78 2181e0c8 2019-03-19 stsp 	if (err)
 79 2181e0c8 2019-03-19 stsp 		got_deflate_end(zb);
 80 2181e0c8 2019-03-19 stsp 	return err;
 81 2181e0c8 2019-03-19 stsp }
 82 2181e0c8 2019-03-19 stsp 
 83 91b40e30 2021-05-21 stsp static void
 84 31e61ec1 2021-09-28 naddy csum_output(struct got_deflate_checksum *csum, const uint8_t *buf, size_t len)
 85 91b40e30 2021-05-21 stsp {
 86 91b40e30 2021-05-21 stsp 	if (csum->output_crc)
 87 91b40e30 2021-05-21 stsp 		*csum->output_crc = crc32(*csum->output_crc, buf, len);
 88 91b40e30 2021-05-21 stsp 
 89 91b40e30 2021-05-21 stsp 	if (csum->output_sha1)
 90 91b40e30 2021-05-21 stsp 		SHA1Update(csum->output_sha1, buf, len);
 91 91b40e30 2021-05-21 stsp }
 92 91b40e30 2021-05-21 stsp 
 93 2181e0c8 2019-03-19 stsp const struct got_error *
 94 72840534 2022-01-19 stsp got_deflate_read(struct got_deflate_buf *zb, FILE *f, off_t len,
 95 72840534 2022-01-19 stsp     size_t *outlenp, off_t *consumed)
 96 2181e0c8 2019-03-19 stsp {
 97 2181e0c8 2019-03-19 stsp 	size_t last_total_out = zb->z.total_out;
 98 2181e0c8 2019-03-19 stsp 	z_stream *z = &zb->z;
 99 2181e0c8 2019-03-19 stsp 	int ret = Z_ERRNO;
100 2181e0c8 2019-03-19 stsp 
101 2181e0c8 2019-03-19 stsp 	z->next_out = zb->outbuf;
102 2181e0c8 2019-03-19 stsp 	z->avail_out = zb->outlen;
103 2181e0c8 2019-03-19 stsp 
104 2181e0c8 2019-03-19 stsp 	*outlenp = 0;
105 72840534 2022-01-19 stsp 	*consumed = 0;
106 2181e0c8 2019-03-19 stsp 	do {
107 72840534 2022-01-19 stsp 		size_t last_total_in = z->total_in;
108 2181e0c8 2019-03-19 stsp 		if (z->avail_in == 0) {
109 72840534 2022-01-19 stsp 			size_t n = 0;
110 72840534 2022-01-19 stsp 			if (*consumed < len) {
111 72840534 2022-01-19 stsp 				n = fread(zb->inbuf, 1,
112 72840534 2022-01-19 stsp 				    MIN(zb->inlen, len - *consumed), f);
113 72840534 2022-01-19 stsp 			}
114 2181e0c8 2019-03-19 stsp 			if (n == 0) {
115 2181e0c8 2019-03-19 stsp 				if (ferror(f))
116 2181e0c8 2019-03-19 stsp 					return got_ferror(f, GOT_ERR_IO);
117 2181e0c8 2019-03-19 stsp 				/* EOF */
118 4e4a7005 2019-04-13 stsp 				ret = deflate(z, Z_FINISH);
119 2181e0c8 2019-03-19 stsp 				break;
120 2181e0c8 2019-03-19 stsp 			}
121 2181e0c8 2019-03-19 stsp 			z->next_in = zb->inbuf;
122 2181e0c8 2019-03-19 stsp 			z->avail_in = n;
123 2181e0c8 2019-03-19 stsp 		}
124 2181e0c8 2019-03-19 stsp 		ret = deflate(z, Z_NO_FLUSH);
125 72840534 2022-01-19 stsp 		*consumed += z->total_in - last_total_in;
126 2181e0c8 2019-03-19 stsp 	} while (ret == Z_OK && z->avail_out > 0);
127 2181e0c8 2019-03-19 stsp 
128 2181e0c8 2019-03-19 stsp 	if (ret == Z_OK) {
129 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
130 2181e0c8 2019-03-19 stsp 	} else {
131 2181e0c8 2019-03-19 stsp 		if (ret != Z_STREAM_END)
132 2181e0c8 2019-03-19 stsp 			return got_error(GOT_ERR_COMPRESSION);
133 2181e0c8 2019-03-19 stsp 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
134 2181e0c8 2019-03-19 stsp 	}
135 2181e0c8 2019-03-19 stsp 
136 2181e0c8 2019-03-19 stsp 	*outlenp = z->total_out - last_total_out;
137 2181e0c8 2019-03-19 stsp 	return NULL;
138 2181e0c8 2019-03-19 stsp }
139 2181e0c8 2019-03-19 stsp 
140 2d9e6abf 2022-05-04 stsp static const struct got_error *
141 2d9e6abf 2022-05-04 stsp deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
142 2d9e6abf 2022-05-04 stsp     size_t len, size_t *outlenp, size_t *consumed, int flush_on_eof)
143 64a8571e 2022-01-07 stsp {
144 64a8571e 2022-01-07 stsp 	z_stream *z = &zb->z;
145 64a8571e 2022-01-07 stsp 	size_t last_total_out = z->total_out;
146 64a8571e 2022-01-07 stsp 	int ret = Z_ERRNO;
147 64a8571e 2022-01-07 stsp 
148 64a8571e 2022-01-07 stsp 	z->next_out = zb->outbuf;
149 64a8571e 2022-01-07 stsp 	z->avail_out = zb->outlen;
150 64a8571e 2022-01-07 stsp 
151 64a8571e 2022-01-07 stsp 	*outlenp = 0;
152 64a8571e 2022-01-07 stsp 	*consumed = 0;
153 64a8571e 2022-01-07 stsp 	do {
154 64a8571e 2022-01-07 stsp 		size_t last_total_in = z->total_in;
155 64a8571e 2022-01-07 stsp 		if (z->avail_in == 0) {
156 64a8571e 2022-01-07 stsp 			z->next_in = map + offset + *consumed;
157 a9bd296d 2022-02-08 stsp 			if (len - *consumed > UINT_MAX)
158 a9bd296d 2022-02-08 stsp 				z->avail_in = UINT_MAX;
159 a9bd296d 2022-02-08 stsp 			else
160 a9bd296d 2022-02-08 stsp 				z->avail_in = len - *consumed;
161 64a8571e 2022-01-07 stsp 			if (z->avail_in == 0) {
162 64a8571e 2022-01-07 stsp 				/* EOF */
163 2d9e6abf 2022-05-04 stsp 				if (flush_on_eof)
164 2d9e6abf 2022-05-04 stsp 					ret = deflate(z, Z_FINISH);
165 64a8571e 2022-01-07 stsp 				break;
166 64a8571e 2022-01-07 stsp 			}
167 64a8571e 2022-01-07 stsp 		}
168 64a8571e 2022-01-07 stsp 		ret = deflate(z, Z_NO_FLUSH);
169 64a8571e 2022-01-07 stsp 		*consumed += z->total_in - last_total_in;
170 64a8571e 2022-01-07 stsp 	} while (ret == Z_OK && z->avail_out > 0);
171 64a8571e 2022-01-07 stsp 
172 64a8571e 2022-01-07 stsp 	if (ret == Z_OK) {
173 64a8571e 2022-01-07 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
174 64a8571e 2022-01-07 stsp 	} else {
175 64a8571e 2022-01-07 stsp 		if (ret != Z_STREAM_END)
176 64a8571e 2022-01-07 stsp 			return got_error(GOT_ERR_COMPRESSION);
177 64a8571e 2022-01-07 stsp 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
178 64a8571e 2022-01-07 stsp 	}
179 64a8571e 2022-01-07 stsp 
180 64a8571e 2022-01-07 stsp 	*outlenp = z->total_out - last_total_out;
181 2d9e6abf 2022-05-04 stsp 	return NULL;
182 2d9e6abf 2022-05-04 stsp }
183 2d9e6abf 2022-05-04 stsp 
184 2d9e6abf 2022-05-04 stsp const struct got_error *
185 2d9e6abf 2022-05-04 stsp got_deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
186 2d9e6abf 2022-05-04 stsp     size_t len, size_t *outlenp, size_t *consumed)
187 2d9e6abf 2022-05-04 stsp {
188 2d9e6abf 2022-05-04 stsp 	return deflate_read_mmap(zb, map, offset, len, outlenp, consumed, 1);
189 2d9e6abf 2022-05-04 stsp }
190 2d9e6abf 2022-05-04 stsp 
191 2d9e6abf 2022-05-04 stsp const struct got_error *
192 2d9e6abf 2022-05-04 stsp got_deflate_flush(struct got_deflate_buf *zb, FILE *outfile,
193 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum, off_t *outlenp)
194 2d9e6abf 2022-05-04 stsp {
195 2d9e6abf 2022-05-04 stsp 	int ret;
196 2d9e6abf 2022-05-04 stsp 	size_t n;
197 2d9e6abf 2022-05-04 stsp 	z_stream *z = &zb->z;
198 2d9e6abf 2022-05-04 stsp 
199 2d9e6abf 2022-05-04 stsp 	if (z->avail_in != 0)
200 2d9e6abf 2022-05-04 stsp 		return got_error_msg(GOT_ERR_COMPRESSION,
201 2d9e6abf 2022-05-04 stsp 		    "cannot flush zb with pending input data");
202 2d9e6abf 2022-05-04 stsp 
203 2d9e6abf 2022-05-04 stsp 	do {
204 2d9e6abf 2022-05-04 stsp 		size_t avail, last_total_out = zb->z.total_out;
205 2d9e6abf 2022-05-04 stsp 
206 2d9e6abf 2022-05-04 stsp 		z->next_out = zb->outbuf;
207 2d9e6abf 2022-05-04 stsp 		z->avail_out = zb->outlen;
208 2d9e6abf 2022-05-04 stsp 
209 2d9e6abf 2022-05-04 stsp 		ret = deflate(z, Z_FINISH);
210 2d9e6abf 2022-05-04 stsp 		if (ret != Z_STREAM_END && ret != Z_OK)
211 2d9e6abf 2022-05-04 stsp 			return got_error(GOT_ERR_COMPRESSION);
212 2d9e6abf 2022-05-04 stsp 
213 2d9e6abf 2022-05-04 stsp 		avail = z->total_out - last_total_out;
214 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
215 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
216 2d9e6abf 2022-05-04 stsp 			if (n != 1)
217 2d9e6abf 2022-05-04 stsp 				return got_ferror(outfile, GOT_ERR_IO);
218 2d9e6abf 2022-05-04 stsp 			if (csum)
219 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
220 2d9e6abf 2022-05-04 stsp 			if (outlenp)
221 2d9e6abf 2022-05-04 stsp 				*outlenp += avail;
222 2d9e6abf 2022-05-04 stsp 		}
223 2d9e6abf 2022-05-04 stsp 	} while (ret != Z_STREAM_END);
224 2d9e6abf 2022-05-04 stsp 
225 2d9e6abf 2022-05-04 stsp 	zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
226 64a8571e 2022-01-07 stsp 	return NULL;
227 64a8571e 2022-01-07 stsp }
228 64a8571e 2022-01-07 stsp 
229 2181e0c8 2019-03-19 stsp void
230 2181e0c8 2019-03-19 stsp got_deflate_end(struct got_deflate_buf *zb)
231 2181e0c8 2019-03-19 stsp {
232 2181e0c8 2019-03-19 stsp 	free(zb->inbuf);
233 2181e0c8 2019-03-19 stsp 	if (zb->flags & GOT_DEFLATE_F_OWN_OUTBUF)
234 2181e0c8 2019-03-19 stsp 		free(zb->outbuf);
235 2181e0c8 2019-03-19 stsp 	deflateEnd(&zb->z);
236 894e4711 2022-10-15 stsp }
237 894e4711 2022-10-15 stsp 
238 894e4711 2022-10-15 stsp const struct got_error *
239 894e4711 2022-10-15 stsp got_deflate_to_fd(off_t *outlen, FILE *infile, off_t len, int outfd,
240 894e4711 2022-10-15 stsp     struct got_deflate_checksum *csum)
241 894e4711 2022-10-15 stsp {
242 894e4711 2022-10-15 stsp 	const struct got_error *err;
243 894e4711 2022-10-15 stsp 	size_t avail;
244 894e4711 2022-10-15 stsp 	off_t consumed;
245 894e4711 2022-10-15 stsp 	struct got_deflate_buf zb;
246 894e4711 2022-10-15 stsp 
247 894e4711 2022-10-15 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
248 894e4711 2022-10-15 stsp 	if (err)
249 894e4711 2022-10-15 stsp 		goto done;
250 894e4711 2022-10-15 stsp 
251 894e4711 2022-10-15 stsp 	*outlen = 0;
252 894e4711 2022-10-15 stsp 
253 894e4711 2022-10-15 stsp 	do {
254 894e4711 2022-10-15 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
255 894e4711 2022-10-15 stsp 		if (err)
256 894e4711 2022-10-15 stsp 			goto done;
257 894e4711 2022-10-15 stsp 		len -= consumed;
258 894e4711 2022-10-15 stsp 		if (avail > 0) {
259 13b2bc37 2022-10-23 stsp 			err = got_poll_write_full(outfd, zb.outbuf, avail);
260 13b2bc37 2022-10-23 stsp 			if (err)
261 894e4711 2022-10-15 stsp 				goto done;
262 894e4711 2022-10-15 stsp 			if (csum)
263 894e4711 2022-10-15 stsp 				csum_output(csum, zb.outbuf, avail);
264 894e4711 2022-10-15 stsp 			*outlen += avail;
265 894e4711 2022-10-15 stsp 		}
266 894e4711 2022-10-15 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
267 894e4711 2022-10-15 stsp 
268 894e4711 2022-10-15 stsp done:
269 894e4711 2022-10-15 stsp 	got_deflate_end(&zb);
270 894e4711 2022-10-15 stsp 	return err;
271 894e4711 2022-10-15 stsp }
272 894e4711 2022-10-15 stsp 
273 894e4711 2022-10-15 stsp const struct got_error *
274 894e4711 2022-10-15 stsp got_deflate_to_fd_mmap(off_t *outlen, uint8_t *map, size_t offset,
275 894e4711 2022-10-15 stsp     size_t len, int outfd, struct got_deflate_checksum *csum)
276 894e4711 2022-10-15 stsp {
277 894e4711 2022-10-15 stsp 	const struct got_error *err;
278 894e4711 2022-10-15 stsp 	size_t avail, consumed;
279 894e4711 2022-10-15 stsp 	struct got_deflate_buf zb;
280 894e4711 2022-10-15 stsp 
281 894e4711 2022-10-15 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
282 894e4711 2022-10-15 stsp 	if (err)
283 894e4711 2022-10-15 stsp 		goto done;
284 894e4711 2022-10-15 stsp 
285 894e4711 2022-10-15 stsp 	*outlen = 0;
286 894e4711 2022-10-15 stsp 	do {
287 894e4711 2022-10-15 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
288 894e4711 2022-10-15 stsp 		    &consumed);
289 894e4711 2022-10-15 stsp 		if (err)
290 894e4711 2022-10-15 stsp 			goto done;
291 894e4711 2022-10-15 stsp 		offset += consumed;
292 894e4711 2022-10-15 stsp 		len -= consumed;
293 894e4711 2022-10-15 stsp 		if (avail > 0) {
294 13b2bc37 2022-10-23 stsp 			err = got_poll_write_full(outfd, zb.outbuf, avail);
295 13b2bc37 2022-10-23 stsp 			if (err)
296 894e4711 2022-10-15 stsp 				goto done;
297 894e4711 2022-10-15 stsp 			if (csum)
298 894e4711 2022-10-15 stsp 				csum_output(csum, zb.outbuf, avail);
299 894e4711 2022-10-15 stsp 			*outlen += avail;
300 894e4711 2022-10-15 stsp 		}
301 894e4711 2022-10-15 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
302 894e4711 2022-10-15 stsp 
303 894e4711 2022-10-15 stsp done:
304 894e4711 2022-10-15 stsp 	got_deflate_end(&zb);
305 894e4711 2022-10-15 stsp 	return err;
306 2181e0c8 2019-03-19 stsp }
307 2181e0c8 2019-03-19 stsp 
308 2181e0c8 2019-03-19 stsp const struct got_error *
309 72840534 2022-01-19 stsp got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
310 72840534 2022-01-19 stsp     FILE *outfile, struct got_deflate_checksum *csum)
311 2181e0c8 2019-03-19 stsp {
312 2181e0c8 2019-03-19 stsp 	const struct got_error *err;
313 2181e0c8 2019-03-19 stsp 	size_t avail;
314 72840534 2022-01-19 stsp 	off_t consumed;
315 2181e0c8 2019-03-19 stsp 	struct got_deflate_buf zb;
316 2181e0c8 2019-03-19 stsp 
317 3b9e6fcf 2021-06-05 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
318 2181e0c8 2019-03-19 stsp 	if (err)
319 2181e0c8 2019-03-19 stsp 		goto done;
320 2181e0c8 2019-03-19 stsp 
321 2181e0c8 2019-03-19 stsp 	*outlen = 0;
322 2181e0c8 2019-03-19 stsp 
323 2181e0c8 2019-03-19 stsp 	do {
324 72840534 2022-01-19 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
325 2181e0c8 2019-03-19 stsp 		if (err)
326 2181e0c8 2019-03-19 stsp 			goto done;
327 72840534 2022-01-19 stsp 		len -= consumed;
328 2181e0c8 2019-03-19 stsp 		if (avail > 0) {
329 2181e0c8 2019-03-19 stsp 			size_t n;
330 2181e0c8 2019-03-19 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
331 2181e0c8 2019-03-19 stsp 			if (n != 1) {
332 2181e0c8 2019-03-19 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
333 2181e0c8 2019-03-19 stsp 				goto done;
334 2181e0c8 2019-03-19 stsp 			}
335 3b9e6fcf 2021-06-05 stsp 			if (csum)
336 3b9e6fcf 2021-06-05 stsp 				csum_output(csum, zb.outbuf, avail);
337 2181e0c8 2019-03-19 stsp 			*outlen += avail;
338 2181e0c8 2019-03-19 stsp 		}
339 2181e0c8 2019-03-19 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
340 2181e0c8 2019-03-19 stsp 
341 2181e0c8 2019-03-19 stsp done:
342 2181e0c8 2019-03-19 stsp 	got_deflate_end(&zb);
343 2181e0c8 2019-03-19 stsp 	return err;
344 2181e0c8 2019-03-19 stsp }
345 64a8571e 2022-01-07 stsp 
346 64a8571e 2022-01-07 stsp const struct got_error *
347 72840534 2022-01-19 stsp got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
348 64a8571e 2022-01-07 stsp     size_t len, FILE *outfile, struct got_deflate_checksum *csum)
349 64a8571e 2022-01-07 stsp {
350 64a8571e 2022-01-07 stsp 	const struct got_error *err;
351 64a8571e 2022-01-07 stsp 	size_t avail, consumed;
352 64a8571e 2022-01-07 stsp 	struct got_deflate_buf zb;
353 64a8571e 2022-01-07 stsp 
354 64a8571e 2022-01-07 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
355 64a8571e 2022-01-07 stsp 	if (err)
356 64a8571e 2022-01-07 stsp 		goto done;
357 64a8571e 2022-01-07 stsp 
358 64a8571e 2022-01-07 stsp 	*outlen = 0;
359 64a8571e 2022-01-07 stsp 	do {
360 64a8571e 2022-01-07 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
361 64a8571e 2022-01-07 stsp 		    &consumed);
362 64a8571e 2022-01-07 stsp 		if (err)
363 64a8571e 2022-01-07 stsp 			goto done;
364 64a8571e 2022-01-07 stsp 		offset += consumed;
365 64a8571e 2022-01-07 stsp 		len -= consumed;
366 64a8571e 2022-01-07 stsp 		if (avail > 0) {
367 64a8571e 2022-01-07 stsp 			size_t n;
368 64a8571e 2022-01-07 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
369 64a8571e 2022-01-07 stsp 			if (n != 1) {
370 64a8571e 2022-01-07 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
371 64a8571e 2022-01-07 stsp 				goto done;
372 64a8571e 2022-01-07 stsp 			}
373 64a8571e 2022-01-07 stsp 			if (csum)
374 64a8571e 2022-01-07 stsp 				csum_output(csum, zb.outbuf, avail);
375 64a8571e 2022-01-07 stsp 			*outlen += avail;
376 64a8571e 2022-01-07 stsp 		}
377 64a8571e 2022-01-07 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
378 2d9e6abf 2022-05-04 stsp 
379 2d9e6abf 2022-05-04 stsp done:
380 2d9e6abf 2022-05-04 stsp 	got_deflate_end(&zb);
381 2d9e6abf 2022-05-04 stsp 	return err;
382 2d9e6abf 2022-05-04 stsp }
383 2d9e6abf 2022-05-04 stsp 
384 2d9e6abf 2022-05-04 stsp const struct got_error *
385 2d9e6abf 2022-05-04 stsp got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
386 2d9e6abf 2022-05-04 stsp     uint8_t *map, size_t offset, size_t len, FILE *outfile,
387 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum)
388 2d9e6abf 2022-05-04 stsp {
389 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
390 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
391 2d9e6abf 2022-05-04 stsp 
392 2d9e6abf 2022-05-04 stsp 	do {
393 2d9e6abf 2022-05-04 stsp 		err = deflate_read_mmap(zb, map, offset, len, &avail,
394 2d9e6abf 2022-05-04 stsp 		    &consumed, 0);
395 2d9e6abf 2022-05-04 stsp 		if (err)
396 2d9e6abf 2022-05-04 stsp 			break;
397 2d9e6abf 2022-05-04 stsp 		offset += consumed;
398 2d9e6abf 2022-05-04 stsp 		len -= consumed;
399 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
400 2d9e6abf 2022-05-04 stsp 			size_t n;
401 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
402 2d9e6abf 2022-05-04 stsp 			if (n != 1) {
403 2d9e6abf 2022-05-04 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
404 2d9e6abf 2022-05-04 stsp 				break;
405 2d9e6abf 2022-05-04 stsp 			}
406 2d9e6abf 2022-05-04 stsp 			if (csum)
407 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
408 2d9e6abf 2022-05-04 stsp 			if (outlen)
409 2d9e6abf 2022-05-04 stsp 				*outlen += avail;
410 2d9e6abf 2022-05-04 stsp 		}
411 2d9e6abf 2022-05-04 stsp 	} while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
412 64a8571e 2022-01-07 stsp 
413 2d9e6abf 2022-05-04 stsp 	return err;
414 2d9e6abf 2022-05-04 stsp }
415 2d9e6abf 2022-05-04 stsp 
416 2d9e6abf 2022-05-04 stsp const struct got_error *
417 2d9e6abf 2022-05-04 stsp got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
418 2d9e6abf 2022-05-04 stsp     size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
419 2d9e6abf 2022-05-04 stsp     size_t offset, size_t len)
420 2d9e6abf 2022-05-04 stsp {
421 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
422 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
423 2d9e6abf 2022-05-04 stsp 	struct got_deflate_buf zb;
424 2d9e6abf 2022-05-04 stsp 	void *newbuf;
425 2d9e6abf 2022-05-04 stsp 	size_t nbuf = 1;
426 2d9e6abf 2022-05-04 stsp 
427 2d9e6abf 2022-05-04 stsp 	if (outbuf) {
428 2d9e6abf 2022-05-04 stsp 		*outbuf = malloc(GOT_DEFLATE_BUFSIZE);
429 2d9e6abf 2022-05-04 stsp 		if (*outbuf == NULL)
430 2d9e6abf 2022-05-04 stsp 			return got_error_from_errno("malloc");
431 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
432 2d9e6abf 2022-05-04 stsp 		if (err) {
433 2d9e6abf 2022-05-04 stsp 			free(*outbuf);
434 2d9e6abf 2022-05-04 stsp 			*outbuf = NULL;
435 2d9e6abf 2022-05-04 stsp 			return err;
436 2d9e6abf 2022-05-04 stsp 		}
437 2d9e6abf 2022-05-04 stsp 	} else {
438 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
439 2d9e6abf 2022-05-04 stsp 		if (err)
440 2d9e6abf 2022-05-04 stsp 			return err;
441 2d9e6abf 2022-05-04 stsp 	}
442 2d9e6abf 2022-05-04 stsp 
443 2d9e6abf 2022-05-04 stsp 	*outlen = 0;
444 2d9e6abf 2022-05-04 stsp 	if (consumed_total)
445 2d9e6abf 2022-05-04 stsp 		*consumed_total = 0;
446 2d9e6abf 2022-05-04 stsp 	do {
447 2d9e6abf 2022-05-04 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
448 2d9e6abf 2022-05-04 stsp 		    &consumed);
449 2d9e6abf 2022-05-04 stsp 		if (err)
450 2d9e6abf 2022-05-04 stsp 			goto done;
451 2d9e6abf 2022-05-04 stsp 		offset += consumed;
452 2d9e6abf 2022-05-04 stsp 		if (consumed_total)
453 2d9e6abf 2022-05-04 stsp 			*consumed_total += consumed;
454 2d9e6abf 2022-05-04 stsp 		len -= consumed;
455 2d9e6abf 2022-05-04 stsp 		if (avail > 0 && csum)
456 2d9e6abf 2022-05-04 stsp 			csum_output(csum, zb.outbuf, avail);
457 2d9e6abf 2022-05-04 stsp 		*outlen += avail;
458 2d9e6abf 2022-05-04 stsp 		if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
459 2d9e6abf 2022-05-04 stsp 			newbuf = reallocarray(*outbuf, ++nbuf,
460 2d9e6abf 2022-05-04 stsp 			    GOT_DEFLATE_BUFSIZE);
461 2d9e6abf 2022-05-04 stsp 			if (newbuf == NULL) {
462 2d9e6abf 2022-05-04 stsp 				err = got_error_from_errno("reallocarray");
463 2d9e6abf 2022-05-04 stsp 				free(*outbuf);
464 2d9e6abf 2022-05-04 stsp 				*outbuf = NULL;
465 2d9e6abf 2022-05-04 stsp 				*outlen = 0;
466 2d9e6abf 2022-05-04 stsp 				goto done;
467 2d9e6abf 2022-05-04 stsp 			}
468 2d9e6abf 2022-05-04 stsp 			*outbuf = newbuf;
469 2d9e6abf 2022-05-04 stsp 			zb.outbuf = newbuf + *outlen;
470 2d9e6abf 2022-05-04 stsp 			zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
471 2d9e6abf 2022-05-04 stsp 		}
472 2d9e6abf 2022-05-04 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
473 64a8571e 2022-01-07 stsp done:
474 64a8571e 2022-01-07 stsp 	got_deflate_end(&zb);
475 64a8571e 2022-01-07 stsp 	return err;
476 64a8571e 2022-01-07 stsp }