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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 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 5822e79e 2023-02-23 op #include <sha2.h>
 25 2181e0c8 2019-03-19 stsp #include <zlib.h>
 26 2181e0c8 2019-03-19 stsp #include <time.h>
 27 2181e0c8 2019-03-19 stsp 
 28 2181e0c8 2019-03-19 stsp #include "got_error.h"
 29 2181e0c8 2019-03-19 stsp #include "got_object.h"
 30 324d37e7 2019-05-11 stsp #include "got_path.h"
 31 2181e0c8 2019-03-19 stsp 
 32 2181e0c8 2019-03-19 stsp #include "got_lib_deflate.h"
 33 ae25a666 2023-02-23 op #include "got_lib_hash.h"
 34 13b2bc37 2022-10-23 stsp #include "got_lib_poll.h"
 35 2181e0c8 2019-03-19 stsp 
 36 2181e0c8 2019-03-19 stsp #ifndef MIN
 37 2181e0c8 2019-03-19 stsp #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
 38 2181e0c8 2019-03-19 stsp #endif
 39 2181e0c8 2019-03-19 stsp 
 40 2181e0c8 2019-03-19 stsp const struct got_error *
 41 3b9e6fcf 2021-06-05 stsp got_deflate_init(struct got_deflate_buf *zb, uint8_t *outbuf, size_t bufsize)
 42 2181e0c8 2019-03-19 stsp {
 43 2181e0c8 2019-03-19 stsp 	const struct got_error *err = NULL;
 44 2181e0c8 2019-03-19 stsp 	int zerr;
 45 2181e0c8 2019-03-19 stsp 
 46 0fc5e229 2022-11-08 stsp 	memset(zb, 0, sizeof(*zb));
 47 2181e0c8 2019-03-19 stsp 
 48 2181e0c8 2019-03-19 stsp 	zb->z.zalloc = Z_NULL;
 49 2181e0c8 2019-03-19 stsp 	zb->z.zfree = Z_NULL;
 50 2181e0c8 2019-03-19 stsp 	zerr = deflateInit(&zb->z, Z_DEFAULT_COMPRESSION);
 51 2181e0c8 2019-03-19 stsp 	if (zerr != Z_OK) {
 52 2181e0c8 2019-03-19 stsp 		if  (zerr == Z_ERRNO)
 53 638f9024 2019-05-13 stsp 			return got_error_from_errno("deflateInit");
 54 2181e0c8 2019-03-19 stsp 		if  (zerr == Z_MEM_ERROR) {
 55 2181e0c8 2019-03-19 stsp 			errno = ENOMEM;
 56 638f9024 2019-05-13 stsp 			return got_error_from_errno("deflateInit");
 57 2181e0c8 2019-03-19 stsp 		}
 58 2181e0c8 2019-03-19 stsp 		return got_error(GOT_ERR_COMPRESSION);
 59 2181e0c8 2019-03-19 stsp 	}
 60 2181e0c8 2019-03-19 stsp 
 61 2181e0c8 2019-03-19 stsp 	zb->inlen = zb->outlen = bufsize;
 62 2181e0c8 2019-03-19 stsp 
 63 2181e0c8 2019-03-19 stsp 	zb->inbuf = calloc(1, zb->inlen);
 64 2181e0c8 2019-03-19 stsp 	if (zb->inbuf == NULL) {
 65 638f9024 2019-05-13 stsp 		err = got_error_from_errno("calloc");
 66 2181e0c8 2019-03-19 stsp 		goto done;
 67 2181e0c8 2019-03-19 stsp 	}
 68 2181e0c8 2019-03-19 stsp 
 69 2181e0c8 2019-03-19 stsp 	zb->flags = 0;
 70 2181e0c8 2019-03-19 stsp 	if (outbuf == NULL) {
 71 2181e0c8 2019-03-19 stsp 		zb->outbuf = calloc(1, zb->outlen);
 72 2181e0c8 2019-03-19 stsp 		if (zb->outbuf == NULL) {
 73 638f9024 2019-05-13 stsp 			err = got_error_from_errno("calloc");
 74 2181e0c8 2019-03-19 stsp 			goto done;
 75 2181e0c8 2019-03-19 stsp 		}
 76 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_OWN_OUTBUF;
 77 2181e0c8 2019-03-19 stsp 	} else
 78 2181e0c8 2019-03-19 stsp 		zb->outbuf = outbuf;
 79 2181e0c8 2019-03-19 stsp done:
 80 2181e0c8 2019-03-19 stsp 	if (err)
 81 2181e0c8 2019-03-19 stsp 		got_deflate_end(zb);
 82 2181e0c8 2019-03-19 stsp 	return err;
 83 2181e0c8 2019-03-19 stsp }
 84 2181e0c8 2019-03-19 stsp 
 85 91b40e30 2021-05-21 stsp static void
 86 31e61ec1 2021-09-28 naddy csum_output(struct got_deflate_checksum *csum, const uint8_t *buf, size_t len)
 87 91b40e30 2021-05-21 stsp {
 88 91b40e30 2021-05-21 stsp 	if (csum->output_crc)
 89 91b40e30 2021-05-21 stsp 		*csum->output_crc = crc32(*csum->output_crc, buf, len);
 90 91b40e30 2021-05-21 stsp 
 91 91b40e30 2021-05-21 stsp 	if (csum->output_sha1)
 92 91b40e30 2021-05-21 stsp 		SHA1Update(csum->output_sha1, buf, len);
 93 ae25a666 2023-02-23 op 
 94 ae25a666 2023-02-23 op 	if (csum->output_ctx)
 95 ae25a666 2023-02-23 op 		got_hash_update(csum->output_ctx, buf, len);
 96 91b40e30 2021-05-21 stsp }
 97 91b40e30 2021-05-21 stsp 
 98 2181e0c8 2019-03-19 stsp const struct got_error *
 99 72840534 2022-01-19 stsp got_deflate_read(struct got_deflate_buf *zb, FILE *f, off_t len,
100 72840534 2022-01-19 stsp     size_t *outlenp, off_t *consumed)
101 2181e0c8 2019-03-19 stsp {
102 2181e0c8 2019-03-19 stsp 	size_t last_total_out = zb->z.total_out;
103 2181e0c8 2019-03-19 stsp 	z_stream *z = &zb->z;
104 2181e0c8 2019-03-19 stsp 	int ret = Z_ERRNO;
105 2181e0c8 2019-03-19 stsp 
106 2181e0c8 2019-03-19 stsp 	z->next_out = zb->outbuf;
107 2181e0c8 2019-03-19 stsp 	z->avail_out = zb->outlen;
108 2181e0c8 2019-03-19 stsp 
109 2181e0c8 2019-03-19 stsp 	*outlenp = 0;
110 72840534 2022-01-19 stsp 	*consumed = 0;
111 2181e0c8 2019-03-19 stsp 	do {
112 72840534 2022-01-19 stsp 		size_t last_total_in = z->total_in;
113 2181e0c8 2019-03-19 stsp 		if (z->avail_in == 0) {
114 72840534 2022-01-19 stsp 			size_t n = 0;
115 72840534 2022-01-19 stsp 			if (*consumed < len) {
116 72840534 2022-01-19 stsp 				n = fread(zb->inbuf, 1,
117 72840534 2022-01-19 stsp 				    MIN(zb->inlen, len - *consumed), f);
118 72840534 2022-01-19 stsp 			}
119 2181e0c8 2019-03-19 stsp 			if (n == 0) {
120 2181e0c8 2019-03-19 stsp 				if (ferror(f))
121 2181e0c8 2019-03-19 stsp 					return got_ferror(f, GOT_ERR_IO);
122 2181e0c8 2019-03-19 stsp 				/* EOF */
123 4e4a7005 2019-04-13 stsp 				ret = deflate(z, Z_FINISH);
124 2181e0c8 2019-03-19 stsp 				break;
125 2181e0c8 2019-03-19 stsp 			}
126 2181e0c8 2019-03-19 stsp 			z->next_in = zb->inbuf;
127 2181e0c8 2019-03-19 stsp 			z->avail_in = n;
128 2181e0c8 2019-03-19 stsp 		}
129 2181e0c8 2019-03-19 stsp 		ret = deflate(z, Z_NO_FLUSH);
130 72840534 2022-01-19 stsp 		*consumed += z->total_in - last_total_in;
131 2181e0c8 2019-03-19 stsp 	} while (ret == Z_OK && z->avail_out > 0);
132 2181e0c8 2019-03-19 stsp 
133 2181e0c8 2019-03-19 stsp 	if (ret == Z_OK) {
134 2181e0c8 2019-03-19 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
135 2181e0c8 2019-03-19 stsp 	} else {
136 2181e0c8 2019-03-19 stsp 		if (ret != Z_STREAM_END)
137 2181e0c8 2019-03-19 stsp 			return got_error(GOT_ERR_COMPRESSION);
138 2181e0c8 2019-03-19 stsp 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
139 2181e0c8 2019-03-19 stsp 	}
140 2181e0c8 2019-03-19 stsp 
141 2181e0c8 2019-03-19 stsp 	*outlenp = z->total_out - last_total_out;
142 2181e0c8 2019-03-19 stsp 	return NULL;
143 2181e0c8 2019-03-19 stsp }
144 2181e0c8 2019-03-19 stsp 
145 2d9e6abf 2022-05-04 stsp static const struct got_error *
146 2d9e6abf 2022-05-04 stsp deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
147 2d9e6abf 2022-05-04 stsp     size_t len, size_t *outlenp, size_t *consumed, int flush_on_eof)
148 64a8571e 2022-01-07 stsp {
149 64a8571e 2022-01-07 stsp 	z_stream *z = &zb->z;
150 64a8571e 2022-01-07 stsp 	size_t last_total_out = z->total_out;
151 64a8571e 2022-01-07 stsp 	int ret = Z_ERRNO;
152 64a8571e 2022-01-07 stsp 
153 64a8571e 2022-01-07 stsp 	z->next_out = zb->outbuf;
154 64a8571e 2022-01-07 stsp 	z->avail_out = zb->outlen;
155 64a8571e 2022-01-07 stsp 
156 64a8571e 2022-01-07 stsp 	*outlenp = 0;
157 64a8571e 2022-01-07 stsp 	*consumed = 0;
158 64a8571e 2022-01-07 stsp 	do {
159 64a8571e 2022-01-07 stsp 		size_t last_total_in = z->total_in;
160 64a8571e 2022-01-07 stsp 		if (z->avail_in == 0) {
161 64a8571e 2022-01-07 stsp 			z->next_in = map + offset + *consumed;
162 a9bd296d 2022-02-08 stsp 			if (len - *consumed > UINT_MAX)
163 a9bd296d 2022-02-08 stsp 				z->avail_in = UINT_MAX;
164 a9bd296d 2022-02-08 stsp 			else
165 a9bd296d 2022-02-08 stsp 				z->avail_in = len - *consumed;
166 64a8571e 2022-01-07 stsp 			if (z->avail_in == 0) {
167 64a8571e 2022-01-07 stsp 				/* EOF */
168 2d9e6abf 2022-05-04 stsp 				if (flush_on_eof)
169 2d9e6abf 2022-05-04 stsp 					ret = deflate(z, Z_FINISH);
170 64a8571e 2022-01-07 stsp 				break;
171 64a8571e 2022-01-07 stsp 			}
172 64a8571e 2022-01-07 stsp 		}
173 64a8571e 2022-01-07 stsp 		ret = deflate(z, Z_NO_FLUSH);
174 64a8571e 2022-01-07 stsp 		*consumed += z->total_in - last_total_in;
175 64a8571e 2022-01-07 stsp 	} while (ret == Z_OK && z->avail_out > 0);
176 64a8571e 2022-01-07 stsp 
177 64a8571e 2022-01-07 stsp 	if (ret == Z_OK) {
178 64a8571e 2022-01-07 stsp 		zb->flags |= GOT_DEFLATE_F_HAVE_MORE;
179 64a8571e 2022-01-07 stsp 	} else {
180 64a8571e 2022-01-07 stsp 		if (ret != Z_STREAM_END)
181 64a8571e 2022-01-07 stsp 			return got_error(GOT_ERR_COMPRESSION);
182 64a8571e 2022-01-07 stsp 		zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
183 64a8571e 2022-01-07 stsp 	}
184 64a8571e 2022-01-07 stsp 
185 64a8571e 2022-01-07 stsp 	*outlenp = z->total_out - last_total_out;
186 2d9e6abf 2022-05-04 stsp 	return NULL;
187 2d9e6abf 2022-05-04 stsp }
188 2d9e6abf 2022-05-04 stsp 
189 2d9e6abf 2022-05-04 stsp const struct got_error *
190 2d9e6abf 2022-05-04 stsp got_deflate_read_mmap(struct got_deflate_buf *zb, uint8_t *map, size_t offset,
191 2d9e6abf 2022-05-04 stsp     size_t len, size_t *outlenp, size_t *consumed)
192 2d9e6abf 2022-05-04 stsp {
193 2d9e6abf 2022-05-04 stsp 	return deflate_read_mmap(zb, map, offset, len, outlenp, consumed, 1);
194 2d9e6abf 2022-05-04 stsp }
195 2d9e6abf 2022-05-04 stsp 
196 2d9e6abf 2022-05-04 stsp const struct got_error *
197 2d9e6abf 2022-05-04 stsp got_deflate_flush(struct got_deflate_buf *zb, FILE *outfile,
198 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum, off_t *outlenp)
199 2d9e6abf 2022-05-04 stsp {
200 2d9e6abf 2022-05-04 stsp 	int ret;
201 2d9e6abf 2022-05-04 stsp 	size_t n;
202 2d9e6abf 2022-05-04 stsp 	z_stream *z = &zb->z;
203 2d9e6abf 2022-05-04 stsp 
204 2d9e6abf 2022-05-04 stsp 	if (z->avail_in != 0)
205 2d9e6abf 2022-05-04 stsp 		return got_error_msg(GOT_ERR_COMPRESSION,
206 2d9e6abf 2022-05-04 stsp 		    "cannot flush zb with pending input data");
207 2d9e6abf 2022-05-04 stsp 
208 2d9e6abf 2022-05-04 stsp 	do {
209 2d9e6abf 2022-05-04 stsp 		size_t avail, last_total_out = zb->z.total_out;
210 2d9e6abf 2022-05-04 stsp 
211 2d9e6abf 2022-05-04 stsp 		z->next_out = zb->outbuf;
212 2d9e6abf 2022-05-04 stsp 		z->avail_out = zb->outlen;
213 2d9e6abf 2022-05-04 stsp 
214 2d9e6abf 2022-05-04 stsp 		ret = deflate(z, Z_FINISH);
215 2d9e6abf 2022-05-04 stsp 		if (ret != Z_STREAM_END && ret != Z_OK)
216 2d9e6abf 2022-05-04 stsp 			return got_error(GOT_ERR_COMPRESSION);
217 2d9e6abf 2022-05-04 stsp 
218 2d9e6abf 2022-05-04 stsp 		avail = z->total_out - last_total_out;
219 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
220 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
221 2d9e6abf 2022-05-04 stsp 			if (n != 1)
222 2d9e6abf 2022-05-04 stsp 				return got_ferror(outfile, GOT_ERR_IO);
223 2d9e6abf 2022-05-04 stsp 			if (csum)
224 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
225 2d9e6abf 2022-05-04 stsp 			if (outlenp)
226 2d9e6abf 2022-05-04 stsp 				*outlenp += avail;
227 2d9e6abf 2022-05-04 stsp 		}
228 2d9e6abf 2022-05-04 stsp 	} while (ret != Z_STREAM_END);
229 2d9e6abf 2022-05-04 stsp 
230 2d9e6abf 2022-05-04 stsp 	zb->flags &= ~GOT_DEFLATE_F_HAVE_MORE;
231 64a8571e 2022-01-07 stsp 	return NULL;
232 64a8571e 2022-01-07 stsp }
233 64a8571e 2022-01-07 stsp 
234 2181e0c8 2019-03-19 stsp void
235 2181e0c8 2019-03-19 stsp got_deflate_end(struct got_deflate_buf *zb)
236 2181e0c8 2019-03-19 stsp {
237 2181e0c8 2019-03-19 stsp 	free(zb->inbuf);
238 2181e0c8 2019-03-19 stsp 	if (zb->flags & GOT_DEFLATE_F_OWN_OUTBUF)
239 2181e0c8 2019-03-19 stsp 		free(zb->outbuf);
240 2181e0c8 2019-03-19 stsp 	deflateEnd(&zb->z);
241 894e4711 2022-10-15 stsp }
242 894e4711 2022-10-15 stsp 
243 894e4711 2022-10-15 stsp const struct got_error *
244 894e4711 2022-10-15 stsp got_deflate_to_fd(off_t *outlen, FILE *infile, off_t len, int outfd,
245 894e4711 2022-10-15 stsp     struct got_deflate_checksum *csum)
246 894e4711 2022-10-15 stsp {
247 894e4711 2022-10-15 stsp 	const struct got_error *err;
248 894e4711 2022-10-15 stsp 	size_t avail;
249 894e4711 2022-10-15 stsp 	off_t consumed;
250 894e4711 2022-10-15 stsp 	struct got_deflate_buf zb;
251 894e4711 2022-10-15 stsp 
252 894e4711 2022-10-15 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
253 894e4711 2022-10-15 stsp 	if (err)
254 894e4711 2022-10-15 stsp 		goto done;
255 894e4711 2022-10-15 stsp 
256 894e4711 2022-10-15 stsp 	*outlen = 0;
257 894e4711 2022-10-15 stsp 
258 894e4711 2022-10-15 stsp 	do {
259 894e4711 2022-10-15 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
260 894e4711 2022-10-15 stsp 		if (err)
261 894e4711 2022-10-15 stsp 			goto done;
262 894e4711 2022-10-15 stsp 		len -= consumed;
263 894e4711 2022-10-15 stsp 		if (avail > 0) {
264 13b2bc37 2022-10-23 stsp 			err = got_poll_write_full(outfd, zb.outbuf, avail);
265 13b2bc37 2022-10-23 stsp 			if (err)
266 894e4711 2022-10-15 stsp 				goto done;
267 894e4711 2022-10-15 stsp 			if (csum)
268 894e4711 2022-10-15 stsp 				csum_output(csum, zb.outbuf, avail);
269 894e4711 2022-10-15 stsp 			*outlen += avail;
270 894e4711 2022-10-15 stsp 		}
271 894e4711 2022-10-15 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
272 894e4711 2022-10-15 stsp 
273 894e4711 2022-10-15 stsp done:
274 894e4711 2022-10-15 stsp 	got_deflate_end(&zb);
275 894e4711 2022-10-15 stsp 	return err;
276 894e4711 2022-10-15 stsp }
277 894e4711 2022-10-15 stsp 
278 894e4711 2022-10-15 stsp const struct got_error *
279 894e4711 2022-10-15 stsp got_deflate_to_fd_mmap(off_t *outlen, uint8_t *map, size_t offset,
280 894e4711 2022-10-15 stsp     size_t len, int outfd, struct got_deflate_checksum *csum)
281 894e4711 2022-10-15 stsp {
282 894e4711 2022-10-15 stsp 	const struct got_error *err;
283 894e4711 2022-10-15 stsp 	size_t avail, consumed;
284 894e4711 2022-10-15 stsp 	struct got_deflate_buf zb;
285 894e4711 2022-10-15 stsp 
286 894e4711 2022-10-15 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
287 894e4711 2022-10-15 stsp 	if (err)
288 894e4711 2022-10-15 stsp 		goto done;
289 894e4711 2022-10-15 stsp 
290 894e4711 2022-10-15 stsp 	*outlen = 0;
291 894e4711 2022-10-15 stsp 	do {
292 894e4711 2022-10-15 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
293 894e4711 2022-10-15 stsp 		    &consumed);
294 894e4711 2022-10-15 stsp 		if (err)
295 894e4711 2022-10-15 stsp 			goto done;
296 894e4711 2022-10-15 stsp 		offset += consumed;
297 894e4711 2022-10-15 stsp 		len -= consumed;
298 894e4711 2022-10-15 stsp 		if (avail > 0) {
299 13b2bc37 2022-10-23 stsp 			err = got_poll_write_full(outfd, zb.outbuf, avail);
300 13b2bc37 2022-10-23 stsp 			if (err)
301 894e4711 2022-10-15 stsp 				goto done;
302 894e4711 2022-10-15 stsp 			if (csum)
303 894e4711 2022-10-15 stsp 				csum_output(csum, zb.outbuf, avail);
304 894e4711 2022-10-15 stsp 			*outlen += avail;
305 894e4711 2022-10-15 stsp 		}
306 894e4711 2022-10-15 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
307 894e4711 2022-10-15 stsp 
308 894e4711 2022-10-15 stsp done:
309 894e4711 2022-10-15 stsp 	got_deflate_end(&zb);
310 894e4711 2022-10-15 stsp 	return err;
311 2181e0c8 2019-03-19 stsp }
312 2181e0c8 2019-03-19 stsp 
313 2181e0c8 2019-03-19 stsp const struct got_error *
314 72840534 2022-01-19 stsp got_deflate_to_file(off_t *outlen, FILE *infile, off_t len,
315 72840534 2022-01-19 stsp     FILE *outfile, struct got_deflate_checksum *csum)
316 2181e0c8 2019-03-19 stsp {
317 2181e0c8 2019-03-19 stsp 	const struct got_error *err;
318 2181e0c8 2019-03-19 stsp 	size_t avail;
319 72840534 2022-01-19 stsp 	off_t consumed;
320 2181e0c8 2019-03-19 stsp 	struct got_deflate_buf zb;
321 2181e0c8 2019-03-19 stsp 
322 3b9e6fcf 2021-06-05 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
323 2181e0c8 2019-03-19 stsp 	if (err)
324 2181e0c8 2019-03-19 stsp 		goto done;
325 2181e0c8 2019-03-19 stsp 
326 2181e0c8 2019-03-19 stsp 	*outlen = 0;
327 2181e0c8 2019-03-19 stsp 
328 2181e0c8 2019-03-19 stsp 	do {
329 72840534 2022-01-19 stsp 		err = got_deflate_read(&zb, infile, len, &avail, &consumed);
330 2181e0c8 2019-03-19 stsp 		if (err)
331 2181e0c8 2019-03-19 stsp 			goto done;
332 72840534 2022-01-19 stsp 		len -= consumed;
333 2181e0c8 2019-03-19 stsp 		if (avail > 0) {
334 2181e0c8 2019-03-19 stsp 			size_t n;
335 2181e0c8 2019-03-19 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
336 2181e0c8 2019-03-19 stsp 			if (n != 1) {
337 2181e0c8 2019-03-19 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
338 2181e0c8 2019-03-19 stsp 				goto done;
339 2181e0c8 2019-03-19 stsp 			}
340 3b9e6fcf 2021-06-05 stsp 			if (csum)
341 3b9e6fcf 2021-06-05 stsp 				csum_output(csum, zb.outbuf, avail);
342 2181e0c8 2019-03-19 stsp 			*outlen += avail;
343 2181e0c8 2019-03-19 stsp 		}
344 2181e0c8 2019-03-19 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
345 2181e0c8 2019-03-19 stsp 
346 2181e0c8 2019-03-19 stsp done:
347 2181e0c8 2019-03-19 stsp 	got_deflate_end(&zb);
348 2181e0c8 2019-03-19 stsp 	return err;
349 2181e0c8 2019-03-19 stsp }
350 64a8571e 2022-01-07 stsp 
351 64a8571e 2022-01-07 stsp const struct got_error *
352 72840534 2022-01-19 stsp got_deflate_to_file_mmap(off_t *outlen, uint8_t *map, size_t offset,
353 64a8571e 2022-01-07 stsp     size_t len, FILE *outfile, struct got_deflate_checksum *csum)
354 64a8571e 2022-01-07 stsp {
355 64a8571e 2022-01-07 stsp 	const struct got_error *err;
356 64a8571e 2022-01-07 stsp 	size_t avail, consumed;
357 64a8571e 2022-01-07 stsp 	struct got_deflate_buf zb;
358 64a8571e 2022-01-07 stsp 
359 64a8571e 2022-01-07 stsp 	err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
360 64a8571e 2022-01-07 stsp 	if (err)
361 64a8571e 2022-01-07 stsp 		goto done;
362 64a8571e 2022-01-07 stsp 
363 64a8571e 2022-01-07 stsp 	*outlen = 0;
364 64a8571e 2022-01-07 stsp 	do {
365 64a8571e 2022-01-07 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
366 64a8571e 2022-01-07 stsp 		    &consumed);
367 64a8571e 2022-01-07 stsp 		if (err)
368 64a8571e 2022-01-07 stsp 			goto done;
369 64a8571e 2022-01-07 stsp 		offset += consumed;
370 64a8571e 2022-01-07 stsp 		len -= consumed;
371 64a8571e 2022-01-07 stsp 		if (avail > 0) {
372 64a8571e 2022-01-07 stsp 			size_t n;
373 64a8571e 2022-01-07 stsp 			n = fwrite(zb.outbuf, avail, 1, outfile);
374 64a8571e 2022-01-07 stsp 			if (n != 1) {
375 64a8571e 2022-01-07 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
376 64a8571e 2022-01-07 stsp 				goto done;
377 64a8571e 2022-01-07 stsp 			}
378 64a8571e 2022-01-07 stsp 			if (csum)
379 64a8571e 2022-01-07 stsp 				csum_output(csum, zb.outbuf, avail);
380 64a8571e 2022-01-07 stsp 			*outlen += avail;
381 64a8571e 2022-01-07 stsp 		}
382 64a8571e 2022-01-07 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
383 2d9e6abf 2022-05-04 stsp 
384 2d9e6abf 2022-05-04 stsp done:
385 2d9e6abf 2022-05-04 stsp 	got_deflate_end(&zb);
386 2d9e6abf 2022-05-04 stsp 	return err;
387 2d9e6abf 2022-05-04 stsp }
388 2d9e6abf 2022-05-04 stsp 
389 2d9e6abf 2022-05-04 stsp const struct got_error *
390 2d9e6abf 2022-05-04 stsp got_deflate_append_to_file_mmap(struct got_deflate_buf *zb, off_t *outlen,
391 2d9e6abf 2022-05-04 stsp     uint8_t *map, size_t offset, size_t len, FILE *outfile,
392 2d9e6abf 2022-05-04 stsp     struct got_deflate_checksum *csum)
393 2d9e6abf 2022-05-04 stsp {
394 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
395 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
396 2d9e6abf 2022-05-04 stsp 
397 2d9e6abf 2022-05-04 stsp 	do {
398 2d9e6abf 2022-05-04 stsp 		err = deflate_read_mmap(zb, map, offset, len, &avail,
399 2d9e6abf 2022-05-04 stsp 		    &consumed, 0);
400 2d9e6abf 2022-05-04 stsp 		if (err)
401 2d9e6abf 2022-05-04 stsp 			break;
402 2d9e6abf 2022-05-04 stsp 		offset += consumed;
403 2d9e6abf 2022-05-04 stsp 		len -= consumed;
404 2d9e6abf 2022-05-04 stsp 		if (avail > 0) {
405 2d9e6abf 2022-05-04 stsp 			size_t n;
406 2d9e6abf 2022-05-04 stsp 			n = fwrite(zb->outbuf, avail, 1, outfile);
407 2d9e6abf 2022-05-04 stsp 			if (n != 1) {
408 2d9e6abf 2022-05-04 stsp 				err = got_ferror(outfile, GOT_ERR_IO);
409 2d9e6abf 2022-05-04 stsp 				break;
410 2d9e6abf 2022-05-04 stsp 			}
411 2d9e6abf 2022-05-04 stsp 			if (csum)
412 2d9e6abf 2022-05-04 stsp 				csum_output(csum, zb->outbuf, avail);
413 2d9e6abf 2022-05-04 stsp 			if (outlen)
414 2d9e6abf 2022-05-04 stsp 				*outlen += avail;
415 2d9e6abf 2022-05-04 stsp 		}
416 2d9e6abf 2022-05-04 stsp 	} while ((zb->flags & GOT_DEFLATE_F_HAVE_MORE) && len > 0);
417 64a8571e 2022-01-07 stsp 
418 2d9e6abf 2022-05-04 stsp 	return err;
419 2d9e6abf 2022-05-04 stsp }
420 2d9e6abf 2022-05-04 stsp 
421 2d9e6abf 2022-05-04 stsp const struct got_error *
422 2d9e6abf 2022-05-04 stsp got_deflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
423 2d9e6abf 2022-05-04 stsp     size_t *consumed_total, struct got_deflate_checksum *csum, uint8_t *map,
424 2d9e6abf 2022-05-04 stsp     size_t offset, size_t len)
425 2d9e6abf 2022-05-04 stsp {
426 2d9e6abf 2022-05-04 stsp 	const struct got_error *err;
427 2d9e6abf 2022-05-04 stsp 	size_t avail, consumed;
428 2d9e6abf 2022-05-04 stsp 	struct got_deflate_buf zb;
429 2d9e6abf 2022-05-04 stsp 	void *newbuf;
430 2d9e6abf 2022-05-04 stsp 	size_t nbuf = 1;
431 2d9e6abf 2022-05-04 stsp 
432 2d9e6abf 2022-05-04 stsp 	if (outbuf) {
433 2d9e6abf 2022-05-04 stsp 		*outbuf = malloc(GOT_DEFLATE_BUFSIZE);
434 2d9e6abf 2022-05-04 stsp 		if (*outbuf == NULL)
435 2d9e6abf 2022-05-04 stsp 			return got_error_from_errno("malloc");
436 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, *outbuf, GOT_DEFLATE_BUFSIZE);
437 2d9e6abf 2022-05-04 stsp 		if (err) {
438 2d9e6abf 2022-05-04 stsp 			free(*outbuf);
439 2d9e6abf 2022-05-04 stsp 			*outbuf = NULL;
440 2d9e6abf 2022-05-04 stsp 			return err;
441 2d9e6abf 2022-05-04 stsp 		}
442 2d9e6abf 2022-05-04 stsp 	} else {
443 2d9e6abf 2022-05-04 stsp 		err = got_deflate_init(&zb, NULL, GOT_DEFLATE_BUFSIZE);
444 2d9e6abf 2022-05-04 stsp 		if (err)
445 2d9e6abf 2022-05-04 stsp 			return err;
446 2d9e6abf 2022-05-04 stsp 	}
447 2d9e6abf 2022-05-04 stsp 
448 2d9e6abf 2022-05-04 stsp 	*outlen = 0;
449 2d9e6abf 2022-05-04 stsp 	if (consumed_total)
450 2d9e6abf 2022-05-04 stsp 		*consumed_total = 0;
451 2d9e6abf 2022-05-04 stsp 	do {
452 2d9e6abf 2022-05-04 stsp 		err = got_deflate_read_mmap(&zb, map, offset, len, &avail,
453 2d9e6abf 2022-05-04 stsp 		    &consumed);
454 2d9e6abf 2022-05-04 stsp 		if (err)
455 2d9e6abf 2022-05-04 stsp 			goto done;
456 2d9e6abf 2022-05-04 stsp 		offset += consumed;
457 2d9e6abf 2022-05-04 stsp 		if (consumed_total)
458 2d9e6abf 2022-05-04 stsp 			*consumed_total += consumed;
459 2d9e6abf 2022-05-04 stsp 		len -= consumed;
460 2d9e6abf 2022-05-04 stsp 		if (avail > 0 && csum)
461 2d9e6abf 2022-05-04 stsp 			csum_output(csum, zb.outbuf, avail);
462 2d9e6abf 2022-05-04 stsp 		*outlen += avail;
463 2d9e6abf 2022-05-04 stsp 		if ((zb.flags & GOT_DEFLATE_F_HAVE_MORE) && outbuf != NULL) {
464 2d9e6abf 2022-05-04 stsp 			newbuf = reallocarray(*outbuf, ++nbuf,
465 2d9e6abf 2022-05-04 stsp 			    GOT_DEFLATE_BUFSIZE);
466 2d9e6abf 2022-05-04 stsp 			if (newbuf == NULL) {
467 2d9e6abf 2022-05-04 stsp 				err = got_error_from_errno("reallocarray");
468 2d9e6abf 2022-05-04 stsp 				free(*outbuf);
469 2d9e6abf 2022-05-04 stsp 				*outbuf = NULL;
470 2d9e6abf 2022-05-04 stsp 				*outlen = 0;
471 2d9e6abf 2022-05-04 stsp 				goto done;
472 2d9e6abf 2022-05-04 stsp 			}
473 2d9e6abf 2022-05-04 stsp 			*outbuf = newbuf;
474 2d9e6abf 2022-05-04 stsp 			zb.outbuf = newbuf + *outlen;
475 2d9e6abf 2022-05-04 stsp 			zb.outlen = (nbuf * GOT_DEFLATE_BUFSIZE) - *outlen;
476 2d9e6abf 2022-05-04 stsp 		}
477 2d9e6abf 2022-05-04 stsp 	} while (zb.flags & GOT_DEFLATE_F_HAVE_MORE);
478 64a8571e 2022-01-07 stsp done:
479 64a8571e 2022-01-07 stsp 	got_deflate_end(&zb);
480 64a8571e 2022-01-07 stsp 	return err;
481 64a8571e 2022-01-07 stsp }