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9a555706 RS |
1 | /* ==================================================================== |
2 | * Copyright (c) 1999-2015 The OpenSSL Project. All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * | |
11 | * 2. Redistributions in binary form must reproduce the above copyright | |
12 | * notice, this list of conditions and the following disclaimer in | |
13 | * the documentation and/or other materials provided with the | |
14 | * distribution. | |
15 | * | |
16 | * 3. All advertising materials mentioning features or use of this | |
17 | * software must display the following acknowledgment: | |
18 | * "This product includes software developed by the OpenSSL Project | |
19 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
20 | * | |
21 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
22 | * endorse or promote products derived from this software without | |
23 | * prior written permission. For written permission, please contact | |
24 | * openssl-core@OpenSSL.org. | |
25 | * | |
26 | * 5. Products derived from this software may not be called "OpenSSL" | |
27 | * nor may "OpenSSL" appear in their names without prior written | |
28 | * permission of the OpenSSL Project. | |
29 | * | |
30 | * 6. Redistributions of any form whatsoever must retain the following | |
31 | * acknowledgment: | |
32 | * "This product includes software developed by the OpenSSL Project | |
33 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
34 | * | |
35 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
36 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
37 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
38 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
39 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
40 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
41 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
42 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
43 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
44 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
45 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
46 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
47 | * ==================================================================== | |
48 | * | |
49 | * This product includes cryptographic software written by Eric Young | |
50 | * (eay@cryptsoft.com). This product includes software written by Tim | |
51 | * Hudson (tjh@cryptsoft.com). | |
52 | * | |
53 | */ | |
54 | ||
dfeab068 RE |
55 | #include <stdio.h> |
56 | #include <stdlib.h> | |
57 | #include <string.h> | |
ec577822 BM |
58 | #include <openssl/objects.h> |
59 | #include <openssl/comp.h> | |
bdbc9b4d | 60 | #include <openssl/err.h> |
9a555706 | 61 | #include "comp_lcl.h" |
dfeab068 | 62 | |
0f113f3e MC |
63 | COMP_METHOD *COMP_zlib(void); |
64 | ||
65 | static COMP_METHOD zlib_method_nozlib = { | |
66 | NID_undef, | |
67 | "(undef)", | |
68 | NULL, | |
69 | NULL, | |
70 | NULL, | |
71 | NULL, | |
0f113f3e | 72 | }; |
dfeab068 | 73 | |
c4438dc0 | 74 | #ifndef ZLIB |
0f113f3e | 75 | # undef ZLIB_SHARED |
c4438dc0 | 76 | #else |
dfeab068 | 77 | |
0f113f3e | 78 | # include <zlib.h> |
dfeab068 | 79 | |
86a62cf1 RL |
80 | static int zlib_stateful_init(COMP_CTX *ctx); |
81 | static void zlib_stateful_finish(COMP_CTX *ctx); | |
82 | static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out, | |
0f113f3e MC |
83 | unsigned int olen, unsigned char *in, |
84 | unsigned int ilen); | |
86a62cf1 | 85 | static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out, |
0f113f3e MC |
86 | unsigned int olen, unsigned char *in, |
87 | unsigned int ilen); | |
30e5e8ac NL |
88 | |
89 | /* memory allocations functions for zlib intialization */ | |
0f113f3e | 90 | static void *zlib_zalloc(void *opaque, unsigned int no, unsigned int size) |
30e5e8ac | 91 | { |
0f113f3e | 92 | void *p; |
30e5e8ac | 93 | |
b51bce94 | 94 | p = OPENSSL_zalloc(no * size); |
0f113f3e MC |
95 | return p; |
96 | } | |
30e5e8ac | 97 | |
0f113f3e | 98 | static void zlib_zfree(void *opaque, void *address) |
30e5e8ac | 99 | { |
0f113f3e | 100 | OPENSSL_free(address); |
30e5e8ac NL |
101 | } |
102 | ||
0f113f3e MC |
103 | |
104 | static COMP_METHOD zlib_stateful_method = { | |
105 | NID_zlib_compression, | |
106 | LN_zlib_compression, | |
107 | zlib_stateful_init, | |
108 | zlib_stateful_finish, | |
109 | zlib_stateful_compress_block, | |
121ee399 | 110 | zlib_stateful_expand_block |
0f113f3e MC |
111 | }; |
112 | ||
113 | /* | |
20f88b9b RL |
114 | * When OpenSSL is built on Windows, we do not want to require that |
115 | * the ZLIB.DLL be available in order for the OpenSSL DLLs to | |
116 | * work. Therefore, all ZLIB routines are loaded at run time | |
ad2695b1 | 117 | * and we do not link to a .LIB file when ZLIB_SHARED is set. |
20f88b9b | 118 | */ |
0f113f3e MC |
119 | # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) |
120 | # include <windows.h> | |
121 | # endif /* !(OPENSSL_SYS_WINDOWS || | |
122 | * OPENSSL_SYS_WIN32) */ | |
c4438dc0 | 123 | |
0f113f3e MC |
124 | # ifdef ZLIB_SHARED |
125 | # include <openssl/dso.h> | |
20f88b9b | 126 | |
20f88b9b | 127 | /* Function pointers */ |
0f113f3e MC |
128 | typedef int (*compress_ft) (Bytef *dest, uLongf * destLen, |
129 | const Bytef *source, uLong sourceLen); | |
130 | typedef int (*inflateEnd_ft) (z_streamp strm); | |
131 | typedef int (*inflate_ft) (z_streamp strm, int flush); | |
132 | typedef int (*inflateInit__ft) (z_streamp strm, | |
133 | const char *version, int stream_size); | |
134 | typedef int (*deflateEnd_ft) (z_streamp strm); | |
135 | typedef int (*deflate_ft) (z_streamp strm, int flush); | |
136 | typedef int (*deflateInit__ft) (z_streamp strm, int level, | |
137 | const char *version, int stream_size); | |
138 | typedef const char *(*zError__ft) (int err); | |
139 | static compress_ft p_compress = NULL; | |
140 | static inflateEnd_ft p_inflateEnd = NULL; | |
141 | static inflate_ft p_inflate = NULL; | |
142 | static inflateInit__ft p_inflateInit_ = NULL; | |
143 | static deflateEnd_ft p_deflateEnd = NULL; | |
144 | static deflate_ft p_deflate = NULL; | |
145 | static deflateInit__ft p_deflateInit_ = NULL; | |
146 | static zError__ft p_zError = NULL; | |
20f88b9b RL |
147 | |
148 | static int zlib_loaded = 0; /* only attempt to init func pts once */ | |
c4438dc0 | 149 | static DSO *zlib_dso = NULL; |
20f88b9b | 150 | |
0f113f3e MC |
151 | # define compress p_compress |
152 | # define inflateEnd p_inflateEnd | |
153 | # define inflate p_inflate | |
154 | # define inflateInit_ p_inflateInit_ | |
155 | # define deflateEnd p_deflateEnd | |
156 | # define deflate p_deflate | |
157 | # define deflateInit_ p_deflateInit_ | |
158 | # define zError p_zError | |
159 | # endif /* ZLIB_SHARED */ | |
160 | ||
161 | struct zlib_state { | |
162 | z_stream istream; | |
163 | z_stream ostream; | |
164 | }; | |
86a62cf1 | 165 | |
86a62cf1 | 166 | static int zlib_stateful_init(COMP_CTX *ctx) |
0f113f3e MC |
167 | { |
168 | int err; | |
64b25758 | 169 | struct zlib_state *state = OPENSSL_zalloc(sizeof(*state)); |
0f113f3e MC |
170 | |
171 | if (state == NULL) | |
172 | goto err; | |
173 | ||
174 | state->istream.zalloc = zlib_zalloc; | |
175 | state->istream.zfree = zlib_zfree; | |
176 | state->istream.opaque = Z_NULL; | |
177 | state->istream.next_in = Z_NULL; | |
178 | state->istream.next_out = Z_NULL; | |
0f113f3e MC |
179 | err = inflateInit_(&state->istream, ZLIB_VERSION, sizeof(z_stream)); |
180 | if (err != Z_OK) | |
181 | goto err; | |
182 | ||
183 | state->ostream.zalloc = zlib_zalloc; | |
184 | state->ostream.zfree = zlib_zfree; | |
185 | state->ostream.opaque = Z_NULL; | |
186 | state->ostream.next_in = Z_NULL; | |
187 | state->ostream.next_out = Z_NULL; | |
0f113f3e MC |
188 | err = deflateInit_(&state->ostream, Z_DEFAULT_COMPRESSION, |
189 | ZLIB_VERSION, sizeof(z_stream)); | |
190 | if (err != Z_OK) | |
191 | goto err; | |
192 | ||
121ee399 | 193 | ctx->data = state; |
0f113f3e | 194 | return 1; |
86a62cf1 | 195 | err: |
b548a1f1 | 196 | OPENSSL_free(state); |
0f113f3e MC |
197 | return 0; |
198 | } | |
86a62cf1 RL |
199 | |
200 | static void zlib_stateful_finish(COMP_CTX *ctx) | |
0f113f3e | 201 | { |
121ee399 | 202 | struct zlib_state *state = ctx->data; |
0f113f3e MC |
203 | inflateEnd(&state->istream); |
204 | deflateEnd(&state->ostream); | |
205 | OPENSSL_free(state); | |
0f113f3e | 206 | } |
86a62cf1 RL |
207 | |
208 | static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out, | |
0f113f3e MC |
209 | unsigned int olen, unsigned char *in, |
210 | unsigned int ilen) | |
211 | { | |
212 | int err = Z_OK; | |
121ee399 | 213 | struct zlib_state *state = ctx->data; |
0f113f3e MC |
214 | |
215 | if (state == NULL) | |
216 | return -1; | |
217 | ||
218 | state->ostream.next_in = in; | |
219 | state->ostream.avail_in = ilen; | |
220 | state->ostream.next_out = out; | |
221 | state->ostream.avail_out = olen; | |
222 | if (ilen > 0) | |
223 | err = deflate(&state->ostream, Z_SYNC_FLUSH); | |
224 | if (err != Z_OK) | |
225 | return -1; | |
226 | # ifdef DEBUG_ZLIB | |
227 | fprintf(stderr, "compress(%4d)->%4d %s\n", | |
228 | ilen, olen - state->ostream.avail_out, | |
229 | (ilen != olen - state->ostream.avail_out) ? "zlib" : "clear"); | |
230 | # endif | |
231 | return olen - state->ostream.avail_out; | |
232 | } | |
86a62cf1 RL |
233 | |
234 | static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out, | |
0f113f3e MC |
235 | unsigned int olen, unsigned char *in, |
236 | unsigned int ilen) | |
237 | { | |
238 | int err = Z_OK; | |
121ee399 | 239 | struct zlib_state *state = ctx->data; |
0f113f3e MC |
240 | |
241 | if (state == NULL) | |
242 | return 0; | |
243 | ||
244 | state->istream.next_in = in; | |
245 | state->istream.avail_in = ilen; | |
246 | state->istream.next_out = out; | |
247 | state->istream.avail_out = olen; | |
248 | if (ilen > 0) | |
249 | err = inflate(&state->istream, Z_SYNC_FLUSH); | |
250 | if (err != Z_OK) | |
251 | return -1; | |
252 | # ifdef DEBUG_ZLIB | |
253 | fprintf(stderr, "expand(%4d)->%4d %s\n", | |
254 | ilen, olen - state->istream.avail_out, | |
255 | (ilen != olen - state->istream.avail_out) ? "zlib" : "clear"); | |
256 | # endif | |
257 | return olen - state->istream.avail_out; | |
258 | } | |
86a62cf1 | 259 | |
dfeab068 RE |
260 | #endif |
261 | ||
6b691a5c | 262 | COMP_METHOD *COMP_zlib(void) |
0f113f3e MC |
263 | { |
264 | COMP_METHOD *meth = &zlib_method_nozlib; | |
20f88b9b | 265 | |
c4438dc0 | 266 | #ifdef ZLIB_SHARED |
0f113f3e MC |
267 | if (!zlib_loaded) { |
268 | # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) | |
269 | zlib_dso = DSO_load(NULL, "ZLIB1", NULL, 0); | |
270 | # else | |
271 | zlib_dso = DSO_load(NULL, "z", NULL, 0); | |
272 | # endif | |
273 | if (zlib_dso != NULL) { | |
274 | p_compress = (compress_ft) DSO_bind_func(zlib_dso, "compress"); | |
275 | p_inflateEnd | |
276 | = (inflateEnd_ft) DSO_bind_func(zlib_dso, "inflateEnd"); | |
277 | p_inflate = (inflate_ft) DSO_bind_func(zlib_dso, "inflate"); | |
278 | p_inflateInit_ | |
279 | = (inflateInit__ft) DSO_bind_func(zlib_dso, "inflateInit_"); | |
280 | p_deflateEnd | |
281 | = (deflateEnd_ft) DSO_bind_func(zlib_dso, "deflateEnd"); | |
282 | p_deflate = (deflate_ft) DSO_bind_func(zlib_dso, "deflate"); | |
283 | p_deflateInit_ | |
284 | = (deflateInit__ft) DSO_bind_func(zlib_dso, "deflateInit_"); | |
285 | p_zError = (zError__ft) DSO_bind_func(zlib_dso, "zError"); | |
286 | ||
287 | if (p_compress && p_inflateEnd && p_inflate | |
288 | && p_inflateInit_ && p_deflateEnd | |
289 | && p_deflate && p_deflateInit_ && p_zError) | |
290 | zlib_loaded++; | |
121ee399 RS |
291 | if (zlib_loaded) |
292 | meth = &zlib_stateful_method; | |
0f113f3e MC |
293 | } |
294 | } | |
e984b2af | 295 | #endif |
121ee399 RS |
296 | #if defined(ZLIB) |
297 | meth = &zlib_stateful_method; | |
20f88b9b RL |
298 | #endif |
299 | ||
0f113f3e MC |
300 | return (meth); |
301 | } | |
20f88b9b | 302 | |
8931b30d | 303 | void COMP_zlib_cleanup(void) |
0f113f3e | 304 | { |
8931b30d | 305 | #ifdef ZLIB_SHARED |
8cbb1533 DB |
306 | if (zlib_dso != NULL) |
307 | DSO_free(zlib_dso); | |
308 | zlib_dso = NULL; | |
8931b30d | 309 | #endif |
0f113f3e | 310 | } |
8931b30d DSH |
311 | |
312 | #ifdef ZLIB | |
313 | ||
314 | /* Zlib based compression/decompression filter BIO */ | |
315 | ||
0f113f3e MC |
316 | typedef struct { |
317 | unsigned char *ibuf; /* Input buffer */ | |
318 | int ibufsize; /* Buffer size */ | |
319 | z_stream zin; /* Input decompress context */ | |
320 | unsigned char *obuf; /* Output buffer */ | |
321 | int obufsize; /* Output buffer size */ | |
322 | unsigned char *optr; /* Position in output buffer */ | |
323 | int ocount; /* Amount of data in output buffer */ | |
324 | int odone; /* deflate EOF */ | |
325 | int comp_level; /* Compression level to use */ | |
326 | z_stream zout; /* Output compression context */ | |
327 | } BIO_ZLIB_CTX; | |
328 | ||
329 | # define ZLIB_DEFAULT_BUFSIZE 1024 | |
8931b30d DSH |
330 | |
331 | static int bio_zlib_new(BIO *bi); | |
332 | static int bio_zlib_free(BIO *bi); | |
333 | static int bio_zlib_read(BIO *b, char *out, int outl); | |
334 | static int bio_zlib_write(BIO *b, const char *in, int inl); | |
335 | static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr); | |
336 | static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp); | |
337 | ||
0f113f3e MC |
338 | static BIO_METHOD bio_meth_zlib = { |
339 | BIO_TYPE_COMP, | |
340 | "zlib", | |
341 | bio_zlib_write, | |
342 | bio_zlib_read, | |
343 | NULL, | |
344 | NULL, | |
345 | bio_zlib_ctrl, | |
346 | bio_zlib_new, | |
347 | bio_zlib_free, | |
348 | bio_zlib_callback_ctrl | |
349 | }; | |
8931b30d DSH |
350 | |
351 | BIO_METHOD *BIO_f_zlib(void) | |
0f113f3e MC |
352 | { |
353 | return &bio_meth_zlib; | |
354 | } | |
8931b30d DSH |
355 | |
356 | static int bio_zlib_new(BIO *bi) | |
0f113f3e MC |
357 | { |
358 | BIO_ZLIB_CTX *ctx; | |
359 | # ifdef ZLIB_SHARED | |
360 | (void)COMP_zlib(); | |
361 | if (!zlib_loaded) { | |
362 | COMPerr(COMP_F_BIO_ZLIB_NEW, COMP_R_ZLIB_NOT_SUPPORTED); | |
363 | return 0; | |
364 | } | |
365 | # endif | |
64b25758 | 366 | ctx = OPENSSL_zalloc(sizeof(*ctx)); |
90945fa3 | 367 | if (ctx == NULL) { |
0f113f3e MC |
368 | COMPerr(COMP_F_BIO_ZLIB_NEW, ERR_R_MALLOC_FAILURE); |
369 | return 0; | |
370 | } | |
0f113f3e MC |
371 | ctx->ibufsize = ZLIB_DEFAULT_BUFSIZE; |
372 | ctx->obufsize = ZLIB_DEFAULT_BUFSIZE; | |
373 | ctx->zin.zalloc = Z_NULL; | |
374 | ctx->zin.zfree = Z_NULL; | |
0f113f3e MC |
375 | ctx->zout.zalloc = Z_NULL; |
376 | ctx->zout.zfree = Z_NULL; | |
0f113f3e MC |
377 | ctx->comp_level = Z_DEFAULT_COMPRESSION; |
378 | bi->init = 1; | |
379 | bi->ptr = (char *)ctx; | |
380 | bi->flags = 0; | |
381 | return 1; | |
382 | } | |
8931b30d DSH |
383 | |
384 | static int bio_zlib_free(BIO *bi) | |
0f113f3e MC |
385 | { |
386 | BIO_ZLIB_CTX *ctx; | |
387 | if (!bi) | |
388 | return 0; | |
389 | ctx = (BIO_ZLIB_CTX *) bi->ptr; | |
390 | if (ctx->ibuf) { | |
391 | /* Destroy decompress context */ | |
392 | inflateEnd(&ctx->zin); | |
393 | OPENSSL_free(ctx->ibuf); | |
394 | } | |
395 | if (ctx->obuf) { | |
396 | /* Destroy compress context */ | |
397 | deflateEnd(&ctx->zout); | |
398 | OPENSSL_free(ctx->obuf); | |
399 | } | |
400 | OPENSSL_free(ctx); | |
401 | bi->ptr = NULL; | |
402 | bi->init = 0; | |
403 | bi->flags = 0; | |
404 | return 1; | |
405 | } | |
8931b30d DSH |
406 | |
407 | static int bio_zlib_read(BIO *b, char *out, int outl) | |
0f113f3e MC |
408 | { |
409 | BIO_ZLIB_CTX *ctx; | |
410 | int ret; | |
411 | z_stream *zin; | |
412 | if (!out || !outl) | |
413 | return 0; | |
414 | ctx = (BIO_ZLIB_CTX *) b->ptr; | |
415 | zin = &ctx->zin; | |
416 | BIO_clear_retry_flags(b); | |
417 | if (!ctx->ibuf) { | |
418 | ctx->ibuf = OPENSSL_malloc(ctx->ibufsize); | |
90945fa3 | 419 | if (ctx->ibuf == NULL) { |
0f113f3e MC |
420 | COMPerr(COMP_F_BIO_ZLIB_READ, ERR_R_MALLOC_FAILURE); |
421 | return 0; | |
422 | } | |
423 | inflateInit(zin); | |
424 | zin->next_in = ctx->ibuf; | |
425 | zin->avail_in = 0; | |
426 | } | |
427 | ||
428 | /* Copy output data directly to supplied buffer */ | |
429 | zin->next_out = (unsigned char *)out; | |
430 | zin->avail_out = (unsigned int)outl; | |
431 | for (;;) { | |
432 | /* Decompress while data available */ | |
433 | while (zin->avail_in) { | |
434 | ret = inflate(zin, 0); | |
435 | if ((ret != Z_OK) && (ret != Z_STREAM_END)) { | |
436 | COMPerr(COMP_F_BIO_ZLIB_READ, COMP_R_ZLIB_INFLATE_ERROR); | |
437 | ERR_add_error_data(2, "zlib error:", zError(ret)); | |
438 | return 0; | |
439 | } | |
440 | /* If EOF or we've read everything then return */ | |
441 | if ((ret == Z_STREAM_END) || !zin->avail_out) | |
442 | return outl - zin->avail_out; | |
443 | } | |
444 | ||
445 | /* | |
446 | * No data in input buffer try to read some in, if an error then | |
447 | * return the total data read. | |
448 | */ | |
449 | ret = BIO_read(b->next_bio, ctx->ibuf, ctx->ibufsize); | |
450 | if (ret <= 0) { | |
451 | /* Total data read */ | |
452 | int tot = outl - zin->avail_out; | |
453 | BIO_copy_next_retry(b); | |
454 | if (ret < 0) | |
455 | return (tot > 0) ? tot : ret; | |
456 | return tot; | |
457 | } | |
458 | zin->avail_in = ret; | |
459 | zin->next_in = ctx->ibuf; | |
460 | } | |
461 | } | |
8931b30d DSH |
462 | |
463 | static int bio_zlib_write(BIO *b, const char *in, int inl) | |
0f113f3e MC |
464 | { |
465 | BIO_ZLIB_CTX *ctx; | |
466 | int ret; | |
467 | z_stream *zout; | |
468 | if (!in || !inl) | |
469 | return 0; | |
470 | ctx = (BIO_ZLIB_CTX *) b->ptr; | |
471 | if (ctx->odone) | |
472 | return 0; | |
473 | zout = &ctx->zout; | |
474 | BIO_clear_retry_flags(b); | |
475 | if (!ctx->obuf) { | |
476 | ctx->obuf = OPENSSL_malloc(ctx->obufsize); | |
477 | /* Need error here */ | |
90945fa3 | 478 | if (ctx->obuf == NULL) { |
0f113f3e MC |
479 | COMPerr(COMP_F_BIO_ZLIB_WRITE, ERR_R_MALLOC_FAILURE); |
480 | return 0; | |
481 | } | |
482 | ctx->optr = ctx->obuf; | |
483 | ctx->ocount = 0; | |
484 | deflateInit(zout, ctx->comp_level); | |
485 | zout->next_out = ctx->obuf; | |
486 | zout->avail_out = ctx->obufsize; | |
487 | } | |
488 | /* Obtain input data directly from supplied buffer */ | |
489 | zout->next_in = (void *)in; | |
490 | zout->avail_in = inl; | |
491 | for (;;) { | |
492 | /* If data in output buffer write it first */ | |
493 | while (ctx->ocount) { | |
494 | ret = BIO_write(b->next_bio, ctx->optr, ctx->ocount); | |
495 | if (ret <= 0) { | |
496 | /* Total data written */ | |
497 | int tot = inl - zout->avail_in; | |
498 | BIO_copy_next_retry(b); | |
499 | if (ret < 0) | |
500 | return (tot > 0) ? tot : ret; | |
501 | return tot; | |
502 | } | |
503 | ctx->optr += ret; | |
504 | ctx->ocount -= ret; | |
505 | } | |
506 | ||
507 | /* Have we consumed all supplied data? */ | |
508 | if (!zout->avail_in) | |
509 | return inl; | |
510 | ||
511 | /* Compress some more */ | |
512 | ||
513 | /* Reset buffer */ | |
514 | ctx->optr = ctx->obuf; | |
515 | zout->next_out = ctx->obuf; | |
516 | zout->avail_out = ctx->obufsize; | |
517 | /* Compress some more */ | |
518 | ret = deflate(zout, 0); | |
519 | if (ret != Z_OK) { | |
520 | COMPerr(COMP_F_BIO_ZLIB_WRITE, COMP_R_ZLIB_DEFLATE_ERROR); | |
521 | ERR_add_error_data(2, "zlib error:", zError(ret)); | |
522 | return 0; | |
523 | } | |
524 | ctx->ocount = ctx->obufsize - zout->avail_out; | |
525 | } | |
526 | } | |
8931b30d DSH |
527 | |
528 | static int bio_zlib_flush(BIO *b) | |
0f113f3e MC |
529 | { |
530 | BIO_ZLIB_CTX *ctx; | |
531 | int ret; | |
532 | z_stream *zout; | |
533 | ctx = (BIO_ZLIB_CTX *) b->ptr; | |
534 | /* If no data written or already flush show success */ | |
535 | if (!ctx->obuf || (ctx->odone && !ctx->ocount)) | |
536 | return 1; | |
537 | zout = &ctx->zout; | |
538 | BIO_clear_retry_flags(b); | |
539 | /* No more input data */ | |
540 | zout->next_in = NULL; | |
541 | zout->avail_in = 0; | |
542 | for (;;) { | |
543 | /* If data in output buffer write it first */ | |
544 | while (ctx->ocount) { | |
545 | ret = BIO_write(b->next_bio, ctx->optr, ctx->ocount); | |
546 | if (ret <= 0) { | |
547 | BIO_copy_next_retry(b); | |
548 | return ret; | |
549 | } | |
550 | ctx->optr += ret; | |
551 | ctx->ocount -= ret; | |
552 | } | |
553 | if (ctx->odone) | |
554 | return 1; | |
555 | ||
556 | /* Compress some more */ | |
557 | ||
558 | /* Reset buffer */ | |
559 | ctx->optr = ctx->obuf; | |
560 | zout->next_out = ctx->obuf; | |
561 | zout->avail_out = ctx->obufsize; | |
562 | /* Compress some more */ | |
563 | ret = deflate(zout, Z_FINISH); | |
564 | if (ret == Z_STREAM_END) | |
565 | ctx->odone = 1; | |
566 | else if (ret != Z_OK) { | |
567 | COMPerr(COMP_F_BIO_ZLIB_FLUSH, COMP_R_ZLIB_DEFLATE_ERROR); | |
568 | ERR_add_error_data(2, "zlib error:", zError(ret)); | |
569 | return 0; | |
570 | } | |
571 | ctx->ocount = ctx->obufsize - zout->avail_out; | |
572 | } | |
573 | } | |
8931b30d DSH |
574 | |
575 | static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr) | |
0f113f3e MC |
576 | { |
577 | BIO_ZLIB_CTX *ctx; | |
578 | int ret, *ip; | |
579 | int ibs, obs; | |
580 | if (!b->next_bio) | |
581 | return 0; | |
582 | ctx = (BIO_ZLIB_CTX *) b->ptr; | |
583 | switch (cmd) { | |
584 | ||
585 | case BIO_CTRL_RESET: | |
586 | ctx->ocount = 0; | |
587 | ctx->odone = 0; | |
588 | ret = 1; | |
589 | break; | |
590 | ||
591 | case BIO_CTRL_FLUSH: | |
592 | ret = bio_zlib_flush(b); | |
593 | if (ret > 0) | |
594 | ret = BIO_flush(b->next_bio); | |
595 | break; | |
596 | ||
597 | case BIO_C_SET_BUFF_SIZE: | |
598 | ibs = -1; | |
599 | obs = -1; | |
600 | if (ptr != NULL) { | |
601 | ip = ptr; | |
602 | if (*ip == 0) | |
603 | ibs = (int)num; | |
604 | else | |
605 | obs = (int)num; | |
606 | } else { | |
607 | ibs = (int)num; | |
608 | obs = ibs; | |
609 | } | |
610 | ||
611 | if (ibs != -1) { | |
b548a1f1 RS |
612 | OPENSSL_free(ctx->ibuf); |
613 | ctx->ibuf = NULL; | |
0f113f3e MC |
614 | ctx->ibufsize = ibs; |
615 | } | |
616 | ||
617 | if (obs != -1) { | |
b548a1f1 RS |
618 | OPENSSL_free(ctx->obuf); |
619 | ctx->obuf = NULL; | |
0f113f3e MC |
620 | ctx->obufsize = obs; |
621 | } | |
622 | ret = 1; | |
623 | break; | |
624 | ||
625 | case BIO_C_DO_STATE_MACHINE: | |
626 | BIO_clear_retry_flags(b); | |
627 | ret = BIO_ctrl(b->next_bio, cmd, num, ptr); | |
628 | BIO_copy_next_retry(b); | |
629 | break; | |
630 | ||
631 | default: | |
632 | ret = BIO_ctrl(b->next_bio, cmd, num, ptr); | |
633 | break; | |
634 | ||
635 | } | |
8931b30d | 636 | |
0f113f3e MC |
637 | return ret; |
638 | } | |
8931b30d DSH |
639 | |
640 | static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) | |
0f113f3e MC |
641 | { |
642 | if (!b->next_bio) | |
643 | return 0; | |
644 | return BIO_callback_ctrl(b->next_bio, cmd, fp); | |
645 | } | |
8931b30d DSH |
646 | |
647 | #endif |