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Commit | Line | Data |
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dfeab068 RE |
1 | #include <stdio.h> |
2 | #include <stdlib.h> | |
3 | #include <string.h> | |
ec577822 BM |
4 | #include <openssl/objects.h> |
5 | #include <openssl/comp.h> | |
bdbc9b4d | 6 | #include <openssl/err.h> |
dfeab068 | 7 | |
0f113f3e MC |
8 | COMP_METHOD *COMP_zlib(void); |
9 | ||
10 | static COMP_METHOD zlib_method_nozlib = { | |
11 | NID_undef, | |
12 | "(undef)", | |
13 | NULL, | |
14 | NULL, | |
15 | NULL, | |
16 | NULL, | |
17 | NULL, | |
18 | NULL, | |
19 | }; | |
dfeab068 | 20 | |
c4438dc0 | 21 | #ifndef ZLIB |
0f113f3e | 22 | # undef ZLIB_SHARED |
c4438dc0 | 23 | #else |
dfeab068 | 24 | |
0f113f3e | 25 | # include <zlib.h> |
dfeab068 | 26 | |
86a62cf1 RL |
27 | static int zlib_stateful_init(COMP_CTX *ctx); |
28 | static void zlib_stateful_finish(COMP_CTX *ctx); | |
29 | static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out, | |
0f113f3e MC |
30 | unsigned int olen, unsigned char *in, |
31 | unsigned int ilen); | |
86a62cf1 | 32 | static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out, |
0f113f3e MC |
33 | unsigned int olen, unsigned char *in, |
34 | unsigned int ilen); | |
30e5e8ac NL |
35 | |
36 | /* memory allocations functions for zlib intialization */ | |
0f113f3e | 37 | static void *zlib_zalloc(void *opaque, unsigned int no, unsigned int size) |
30e5e8ac | 38 | { |
0f113f3e | 39 | void *p; |
30e5e8ac | 40 | |
0f113f3e MC |
41 | p = OPENSSL_malloc(no * size); |
42 | if (p) | |
43 | memset(p, 0, no * size); | |
44 | return p; | |
45 | } | |
30e5e8ac | 46 | |
0f113f3e | 47 | static void zlib_zfree(void *opaque, void *address) |
30e5e8ac | 48 | { |
0f113f3e | 49 | OPENSSL_free(address); |
30e5e8ac NL |
50 | } |
51 | ||
0f113f3e MC |
52 | |
53 | static COMP_METHOD zlib_stateful_method = { | |
54 | NID_zlib_compression, | |
55 | LN_zlib_compression, | |
56 | zlib_stateful_init, | |
57 | zlib_stateful_finish, | |
58 | zlib_stateful_compress_block, | |
59 | zlib_stateful_expand_block, | |
60 | NULL, | |
61 | NULL, | |
62 | }; | |
63 | ||
64 | /* | |
20f88b9b RL |
65 | * When OpenSSL is built on Windows, we do not want to require that |
66 | * the ZLIB.DLL be available in order for the OpenSSL DLLs to | |
67 | * work. Therefore, all ZLIB routines are loaded at run time | |
ad2695b1 | 68 | * and we do not link to a .LIB file when ZLIB_SHARED is set. |
20f88b9b | 69 | */ |
0f113f3e MC |
70 | # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) |
71 | # include <windows.h> | |
72 | # endif /* !(OPENSSL_SYS_WINDOWS || | |
73 | * OPENSSL_SYS_WIN32) */ | |
c4438dc0 | 74 | |
0f113f3e MC |
75 | # ifdef ZLIB_SHARED |
76 | # include <openssl/dso.h> | |
20f88b9b | 77 | |
20f88b9b | 78 | /* Function pointers */ |
0f113f3e MC |
79 | typedef int (*compress_ft) (Bytef *dest, uLongf * destLen, |
80 | const Bytef *source, uLong sourceLen); | |
81 | typedef int (*inflateEnd_ft) (z_streamp strm); | |
82 | typedef int (*inflate_ft) (z_streamp strm, int flush); | |
83 | typedef int (*inflateInit__ft) (z_streamp strm, | |
84 | const char *version, int stream_size); | |
85 | typedef int (*deflateEnd_ft) (z_streamp strm); | |
86 | typedef int (*deflate_ft) (z_streamp strm, int flush); | |
87 | typedef int (*deflateInit__ft) (z_streamp strm, int level, | |
88 | const char *version, int stream_size); | |
89 | typedef const char *(*zError__ft) (int err); | |
90 | static compress_ft p_compress = NULL; | |
91 | static inflateEnd_ft p_inflateEnd = NULL; | |
92 | static inflate_ft p_inflate = NULL; | |
93 | static inflateInit__ft p_inflateInit_ = NULL; | |
94 | static deflateEnd_ft p_deflateEnd = NULL; | |
95 | static deflate_ft p_deflate = NULL; | |
96 | static deflateInit__ft p_deflateInit_ = NULL; | |
97 | static zError__ft p_zError = NULL; | |
20f88b9b RL |
98 | |
99 | static int zlib_loaded = 0; /* only attempt to init func pts once */ | |
c4438dc0 | 100 | static DSO *zlib_dso = NULL; |
20f88b9b | 101 | |
0f113f3e MC |
102 | # define compress p_compress |
103 | # define inflateEnd p_inflateEnd | |
104 | # define inflate p_inflate | |
105 | # define inflateInit_ p_inflateInit_ | |
106 | # define deflateEnd p_deflateEnd | |
107 | # define deflate p_deflate | |
108 | # define deflateInit_ p_deflateInit_ | |
109 | # define zError p_zError | |
110 | # endif /* ZLIB_SHARED */ | |
111 | ||
112 | struct zlib_state { | |
113 | z_stream istream; | |
114 | z_stream ostream; | |
115 | }; | |
86a62cf1 RL |
116 | |
117 | static int zlib_stateful_ex_idx = -1; | |
118 | ||
86a62cf1 | 119 | static int zlib_stateful_init(COMP_CTX *ctx) |
0f113f3e MC |
120 | { |
121 | int err; | |
b196e7d9 | 122 | struct zlib_state *state = OPENSSL_malloc(sizeof(struct zlib_state)); |
0f113f3e MC |
123 | |
124 | if (state == NULL) | |
125 | goto err; | |
126 | ||
127 | state->istream.zalloc = zlib_zalloc; | |
128 | state->istream.zfree = zlib_zfree; | |
129 | state->istream.opaque = Z_NULL; | |
130 | state->istream.next_in = Z_NULL; | |
131 | state->istream.next_out = Z_NULL; | |
132 | state->istream.avail_in = 0; | |
133 | state->istream.avail_out = 0; | |
134 | err = inflateInit_(&state->istream, ZLIB_VERSION, sizeof(z_stream)); | |
135 | if (err != Z_OK) | |
136 | goto err; | |
137 | ||
138 | state->ostream.zalloc = zlib_zalloc; | |
139 | state->ostream.zfree = zlib_zfree; | |
140 | state->ostream.opaque = Z_NULL; | |
141 | state->ostream.next_in = Z_NULL; | |
142 | state->ostream.next_out = Z_NULL; | |
143 | state->ostream.avail_in = 0; | |
144 | state->ostream.avail_out = 0; | |
145 | err = deflateInit_(&state->ostream, Z_DEFAULT_COMPRESSION, | |
146 | ZLIB_VERSION, sizeof(z_stream)); | |
147 | if (err != Z_OK) | |
148 | goto err; | |
149 | ||
150 | CRYPTO_new_ex_data(CRYPTO_EX_INDEX_COMP, ctx, &ctx->ex_data); | |
151 | CRYPTO_set_ex_data(&ctx->ex_data, zlib_stateful_ex_idx, state); | |
152 | return 1; | |
86a62cf1 | 153 | err: |
b548a1f1 | 154 | OPENSSL_free(state); |
0f113f3e MC |
155 | return 0; |
156 | } | |
86a62cf1 RL |
157 | |
158 | static void zlib_stateful_finish(COMP_CTX *ctx) | |
0f113f3e MC |
159 | { |
160 | struct zlib_state *state = | |
161 | (struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data, | |
162 | zlib_stateful_ex_idx); | |
163 | inflateEnd(&state->istream); | |
164 | deflateEnd(&state->ostream); | |
165 | OPENSSL_free(state); | |
166 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_COMP, ctx, &ctx->ex_data); | |
167 | } | |
86a62cf1 RL |
168 | |
169 | static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out, | |
0f113f3e MC |
170 | unsigned int olen, unsigned char *in, |
171 | unsigned int ilen) | |
172 | { | |
173 | int err = Z_OK; | |
174 | struct zlib_state *state = | |
175 | (struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data, | |
176 | zlib_stateful_ex_idx); | |
177 | ||
178 | if (state == NULL) | |
179 | return -1; | |
180 | ||
181 | state->ostream.next_in = in; | |
182 | state->ostream.avail_in = ilen; | |
183 | state->ostream.next_out = out; | |
184 | state->ostream.avail_out = olen; | |
185 | if (ilen > 0) | |
186 | err = deflate(&state->ostream, Z_SYNC_FLUSH); | |
187 | if (err != Z_OK) | |
188 | return -1; | |
189 | # ifdef DEBUG_ZLIB | |
190 | fprintf(stderr, "compress(%4d)->%4d %s\n", | |
191 | ilen, olen - state->ostream.avail_out, | |
192 | (ilen != olen - state->ostream.avail_out) ? "zlib" : "clear"); | |
193 | # endif | |
194 | return olen - state->ostream.avail_out; | |
195 | } | |
86a62cf1 RL |
196 | |
197 | static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out, | |
0f113f3e MC |
198 | unsigned int olen, unsigned char *in, |
199 | unsigned int ilen) | |
200 | { | |
201 | int err = Z_OK; | |
202 | ||
203 | struct zlib_state *state = | |
204 | (struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data, | |
205 | zlib_stateful_ex_idx); | |
206 | ||
207 | if (state == NULL) | |
208 | return 0; | |
209 | ||
210 | state->istream.next_in = in; | |
211 | state->istream.avail_in = ilen; | |
212 | state->istream.next_out = out; | |
213 | state->istream.avail_out = olen; | |
214 | if (ilen > 0) | |
215 | err = inflate(&state->istream, Z_SYNC_FLUSH); | |
216 | if (err != Z_OK) | |
217 | return -1; | |
218 | # ifdef DEBUG_ZLIB | |
219 | fprintf(stderr, "expand(%4d)->%4d %s\n", | |
220 | ilen, olen - state->istream.avail_out, | |
221 | (ilen != olen - state->istream.avail_out) ? "zlib" : "clear"); | |
222 | # endif | |
223 | return olen - state->istream.avail_out; | |
224 | } | |
86a62cf1 | 225 | |
dfeab068 RE |
226 | #endif |
227 | ||
6b691a5c | 228 | COMP_METHOD *COMP_zlib(void) |
0f113f3e MC |
229 | { |
230 | COMP_METHOD *meth = &zlib_method_nozlib; | |
20f88b9b | 231 | |
c4438dc0 | 232 | #ifdef ZLIB_SHARED |
0f113f3e MC |
233 | if (!zlib_loaded) { |
234 | # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) | |
235 | zlib_dso = DSO_load(NULL, "ZLIB1", NULL, 0); | |
236 | # else | |
237 | zlib_dso = DSO_load(NULL, "z", NULL, 0); | |
238 | # endif | |
239 | if (zlib_dso != NULL) { | |
240 | p_compress = (compress_ft) DSO_bind_func(zlib_dso, "compress"); | |
241 | p_inflateEnd | |
242 | = (inflateEnd_ft) DSO_bind_func(zlib_dso, "inflateEnd"); | |
243 | p_inflate = (inflate_ft) DSO_bind_func(zlib_dso, "inflate"); | |
244 | p_inflateInit_ | |
245 | = (inflateInit__ft) DSO_bind_func(zlib_dso, "inflateInit_"); | |
246 | p_deflateEnd | |
247 | = (deflateEnd_ft) DSO_bind_func(zlib_dso, "deflateEnd"); | |
248 | p_deflate = (deflate_ft) DSO_bind_func(zlib_dso, "deflate"); | |
249 | p_deflateInit_ | |
250 | = (deflateInit__ft) DSO_bind_func(zlib_dso, "deflateInit_"); | |
251 | p_zError = (zError__ft) DSO_bind_func(zlib_dso, "zError"); | |
252 | ||
253 | if (p_compress && p_inflateEnd && p_inflate | |
254 | && p_inflateInit_ && p_deflateEnd | |
255 | && p_deflate && p_deflateInit_ && p_zError) | |
256 | zlib_loaded++; | |
257 | } | |
258 | } | |
e984b2af | 259 | #endif |
0d894c9d | 260 | #ifdef ZLIB_SHARED |
0f113f3e | 261 | if (zlib_loaded) |
0d894c9d DSH |
262 | #endif |
263 | #if defined(ZLIB) || defined(ZLIB_SHARED) | |
0f113f3e MC |
264 | { |
265 | /* | |
266 | * init zlib_stateful_ex_idx here so that in a multi-process | |
267 | * application it's enough to intialize openssl before forking (idx | |
268 | * will be inherited in all the children) | |
269 | */ | |
270 | if (zlib_stateful_ex_idx == -1) { | |
271 | CRYPTO_w_lock(CRYPTO_LOCK_COMP); | |
272 | if (zlib_stateful_ex_idx == -1) | |
273 | zlib_stateful_ex_idx = | |
274 | CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_COMP, | |
275 | 0, NULL, NULL, NULL, NULL); | |
276 | CRYPTO_w_unlock(CRYPTO_LOCK_COMP); | |
277 | if (zlib_stateful_ex_idx == -1) | |
278 | goto err; | |
279 | } | |
280 | ||
281 | meth = &zlib_stateful_method; | |
282 | } | |
283 | err: | |
20f88b9b RL |
284 | #endif |
285 | ||
0f113f3e MC |
286 | return (meth); |
287 | } | |
20f88b9b | 288 | |
8931b30d | 289 | void COMP_zlib_cleanup(void) |
0f113f3e | 290 | { |
8931b30d | 291 | #ifdef ZLIB_SHARED |
efa7dd64 | 292 | DSO_free(zlib_dso); |
8931b30d | 293 | #endif |
0f113f3e | 294 | } |
8931b30d DSH |
295 | |
296 | #ifdef ZLIB | |
297 | ||
298 | /* Zlib based compression/decompression filter BIO */ | |
299 | ||
0f113f3e MC |
300 | typedef struct { |
301 | unsigned char *ibuf; /* Input buffer */ | |
302 | int ibufsize; /* Buffer size */ | |
303 | z_stream zin; /* Input decompress context */ | |
304 | unsigned char *obuf; /* Output buffer */ | |
305 | int obufsize; /* Output buffer size */ | |
306 | unsigned char *optr; /* Position in output buffer */ | |
307 | int ocount; /* Amount of data in output buffer */ | |
308 | int odone; /* deflate EOF */ | |
309 | int comp_level; /* Compression level to use */ | |
310 | z_stream zout; /* Output compression context */ | |
311 | } BIO_ZLIB_CTX; | |
312 | ||
313 | # define ZLIB_DEFAULT_BUFSIZE 1024 | |
8931b30d DSH |
314 | |
315 | static int bio_zlib_new(BIO *bi); | |
316 | static int bio_zlib_free(BIO *bi); | |
317 | static int bio_zlib_read(BIO *b, char *out, int outl); | |
318 | static int bio_zlib_write(BIO *b, const char *in, int inl); | |
319 | static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr); | |
320 | static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp); | |
321 | ||
0f113f3e MC |
322 | static BIO_METHOD bio_meth_zlib = { |
323 | BIO_TYPE_COMP, | |
324 | "zlib", | |
325 | bio_zlib_write, | |
326 | bio_zlib_read, | |
327 | NULL, | |
328 | NULL, | |
329 | bio_zlib_ctrl, | |
330 | bio_zlib_new, | |
331 | bio_zlib_free, | |
332 | bio_zlib_callback_ctrl | |
333 | }; | |
8931b30d DSH |
334 | |
335 | BIO_METHOD *BIO_f_zlib(void) | |
0f113f3e MC |
336 | { |
337 | return &bio_meth_zlib; | |
338 | } | |
8931b30d DSH |
339 | |
340 | static int bio_zlib_new(BIO *bi) | |
0f113f3e MC |
341 | { |
342 | BIO_ZLIB_CTX *ctx; | |
343 | # ifdef ZLIB_SHARED | |
344 | (void)COMP_zlib(); | |
345 | if (!zlib_loaded) { | |
346 | COMPerr(COMP_F_BIO_ZLIB_NEW, COMP_R_ZLIB_NOT_SUPPORTED); | |
347 | return 0; | |
348 | } | |
349 | # endif | |
350 | ctx = OPENSSL_malloc(sizeof(BIO_ZLIB_CTX)); | |
351 | if (!ctx) { | |
352 | COMPerr(COMP_F_BIO_ZLIB_NEW, ERR_R_MALLOC_FAILURE); | |
353 | return 0; | |
354 | } | |
355 | ctx->ibuf = NULL; | |
356 | ctx->obuf = NULL; | |
357 | ctx->ibufsize = ZLIB_DEFAULT_BUFSIZE; | |
358 | ctx->obufsize = ZLIB_DEFAULT_BUFSIZE; | |
359 | ctx->zin.zalloc = Z_NULL; | |
360 | ctx->zin.zfree = Z_NULL; | |
361 | ctx->zin.next_in = NULL; | |
362 | ctx->zin.avail_in = 0; | |
363 | ctx->zin.next_out = NULL; | |
364 | ctx->zin.avail_out = 0; | |
365 | ctx->zout.zalloc = Z_NULL; | |
366 | ctx->zout.zfree = Z_NULL; | |
367 | ctx->zout.next_in = NULL; | |
368 | ctx->zout.avail_in = 0; | |
369 | ctx->zout.next_out = NULL; | |
370 | ctx->zout.avail_out = 0; | |
371 | ctx->odone = 0; | |
372 | ctx->comp_level = Z_DEFAULT_COMPRESSION; | |
373 | bi->init = 1; | |
374 | bi->ptr = (char *)ctx; | |
375 | bi->flags = 0; | |
376 | return 1; | |
377 | } | |
8931b30d DSH |
378 | |
379 | static int bio_zlib_free(BIO *bi) | |
0f113f3e MC |
380 | { |
381 | BIO_ZLIB_CTX *ctx; | |
382 | if (!bi) | |
383 | return 0; | |
384 | ctx = (BIO_ZLIB_CTX *) bi->ptr; | |
385 | if (ctx->ibuf) { | |
386 | /* Destroy decompress context */ | |
387 | inflateEnd(&ctx->zin); | |
388 | OPENSSL_free(ctx->ibuf); | |
389 | } | |
390 | if (ctx->obuf) { | |
391 | /* Destroy compress context */ | |
392 | deflateEnd(&ctx->zout); | |
393 | OPENSSL_free(ctx->obuf); | |
394 | } | |
395 | OPENSSL_free(ctx); | |
396 | bi->ptr = NULL; | |
397 | bi->init = 0; | |
398 | bi->flags = 0; | |
399 | return 1; | |
400 | } | |
8931b30d DSH |
401 | |
402 | static int bio_zlib_read(BIO *b, char *out, int outl) | |
0f113f3e MC |
403 | { |
404 | BIO_ZLIB_CTX *ctx; | |
405 | int ret; | |
406 | z_stream *zin; | |
407 | if (!out || !outl) | |
408 | return 0; | |
409 | ctx = (BIO_ZLIB_CTX *) b->ptr; | |
410 | zin = &ctx->zin; | |
411 | BIO_clear_retry_flags(b); | |
412 | if (!ctx->ibuf) { | |
413 | ctx->ibuf = OPENSSL_malloc(ctx->ibufsize); | |
414 | if (!ctx->ibuf) { | |
415 | COMPerr(COMP_F_BIO_ZLIB_READ, ERR_R_MALLOC_FAILURE); | |
416 | return 0; | |
417 | } | |
418 | inflateInit(zin); | |
419 | zin->next_in = ctx->ibuf; | |
420 | zin->avail_in = 0; | |
421 | } | |
422 | ||
423 | /* Copy output data directly to supplied buffer */ | |
424 | zin->next_out = (unsigned char *)out; | |
425 | zin->avail_out = (unsigned int)outl; | |
426 | for (;;) { | |
427 | /* Decompress while data available */ | |
428 | while (zin->avail_in) { | |
429 | ret = inflate(zin, 0); | |
430 | if ((ret != Z_OK) && (ret != Z_STREAM_END)) { | |
431 | COMPerr(COMP_F_BIO_ZLIB_READ, COMP_R_ZLIB_INFLATE_ERROR); | |
432 | ERR_add_error_data(2, "zlib error:", zError(ret)); | |
433 | return 0; | |
434 | } | |
435 | /* If EOF or we've read everything then return */ | |
436 | if ((ret == Z_STREAM_END) || !zin->avail_out) | |
437 | return outl - zin->avail_out; | |
438 | } | |
439 | ||
440 | /* | |
441 | * No data in input buffer try to read some in, if an error then | |
442 | * return the total data read. | |
443 | */ | |
444 | ret = BIO_read(b->next_bio, ctx->ibuf, ctx->ibufsize); | |
445 | if (ret <= 0) { | |
446 | /* Total data read */ | |
447 | int tot = outl - zin->avail_out; | |
448 | BIO_copy_next_retry(b); | |
449 | if (ret < 0) | |
450 | return (tot > 0) ? tot : ret; | |
451 | return tot; | |
452 | } | |
453 | zin->avail_in = ret; | |
454 | zin->next_in = ctx->ibuf; | |
455 | } | |
456 | } | |
8931b30d DSH |
457 | |
458 | static int bio_zlib_write(BIO *b, const char *in, int inl) | |
0f113f3e MC |
459 | { |
460 | BIO_ZLIB_CTX *ctx; | |
461 | int ret; | |
462 | z_stream *zout; | |
463 | if (!in || !inl) | |
464 | return 0; | |
465 | ctx = (BIO_ZLIB_CTX *) b->ptr; | |
466 | if (ctx->odone) | |
467 | return 0; | |
468 | zout = &ctx->zout; | |
469 | BIO_clear_retry_flags(b); | |
470 | if (!ctx->obuf) { | |
471 | ctx->obuf = OPENSSL_malloc(ctx->obufsize); | |
472 | /* Need error here */ | |
473 | if (!ctx->obuf) { | |
474 | COMPerr(COMP_F_BIO_ZLIB_WRITE, ERR_R_MALLOC_FAILURE); | |
475 | return 0; | |
476 | } | |
477 | ctx->optr = ctx->obuf; | |
478 | ctx->ocount = 0; | |
479 | deflateInit(zout, ctx->comp_level); | |
480 | zout->next_out = ctx->obuf; | |
481 | zout->avail_out = ctx->obufsize; | |
482 | } | |
483 | /* Obtain input data directly from supplied buffer */ | |
484 | zout->next_in = (void *)in; | |
485 | zout->avail_in = inl; | |
486 | for (;;) { | |
487 | /* If data in output buffer write it first */ | |
488 | while (ctx->ocount) { | |
489 | ret = BIO_write(b->next_bio, ctx->optr, ctx->ocount); | |
490 | if (ret <= 0) { | |
491 | /* Total data written */ | |
492 | int tot = inl - zout->avail_in; | |
493 | BIO_copy_next_retry(b); | |
494 | if (ret < 0) | |
495 | return (tot > 0) ? tot : ret; | |
496 | return tot; | |
497 | } | |
498 | ctx->optr += ret; | |
499 | ctx->ocount -= ret; | |
500 | } | |
501 | ||
502 | /* Have we consumed all supplied data? */ | |
503 | if (!zout->avail_in) | |
504 | return inl; | |
505 | ||
506 | /* Compress some more */ | |
507 | ||
508 | /* Reset buffer */ | |
509 | ctx->optr = ctx->obuf; | |
510 | zout->next_out = ctx->obuf; | |
511 | zout->avail_out = ctx->obufsize; | |
512 | /* Compress some more */ | |
513 | ret = deflate(zout, 0); | |
514 | if (ret != Z_OK) { | |
515 | COMPerr(COMP_F_BIO_ZLIB_WRITE, COMP_R_ZLIB_DEFLATE_ERROR); | |
516 | ERR_add_error_data(2, "zlib error:", zError(ret)); | |
517 | return 0; | |
518 | } | |
519 | ctx->ocount = ctx->obufsize - zout->avail_out; | |
520 | } | |
521 | } | |
8931b30d DSH |
522 | |
523 | static int bio_zlib_flush(BIO *b) | |
0f113f3e MC |
524 | { |
525 | BIO_ZLIB_CTX *ctx; | |
526 | int ret; | |
527 | z_stream *zout; | |
528 | ctx = (BIO_ZLIB_CTX *) b->ptr; | |
529 | /* If no data written or already flush show success */ | |
530 | if (!ctx->obuf || (ctx->odone && !ctx->ocount)) | |
531 | return 1; | |
532 | zout = &ctx->zout; | |
533 | BIO_clear_retry_flags(b); | |
534 | /* No more input data */ | |
535 | zout->next_in = NULL; | |
536 | zout->avail_in = 0; | |
537 | for (;;) { | |
538 | /* If data in output buffer write it first */ | |
539 | while (ctx->ocount) { | |
540 | ret = BIO_write(b->next_bio, ctx->optr, ctx->ocount); | |
541 | if (ret <= 0) { | |
542 | BIO_copy_next_retry(b); | |
543 | return ret; | |
544 | } | |
545 | ctx->optr += ret; | |
546 | ctx->ocount -= ret; | |
547 | } | |
548 | if (ctx->odone) | |
549 | return 1; | |
550 | ||
551 | /* Compress some more */ | |
552 | ||
553 | /* Reset buffer */ | |
554 | ctx->optr = ctx->obuf; | |
555 | zout->next_out = ctx->obuf; | |
556 | zout->avail_out = ctx->obufsize; | |
557 | /* Compress some more */ | |
558 | ret = deflate(zout, Z_FINISH); | |
559 | if (ret == Z_STREAM_END) | |
560 | ctx->odone = 1; | |
561 | else if (ret != Z_OK) { | |
562 | COMPerr(COMP_F_BIO_ZLIB_FLUSH, COMP_R_ZLIB_DEFLATE_ERROR); | |
563 | ERR_add_error_data(2, "zlib error:", zError(ret)); | |
564 | return 0; | |
565 | } | |
566 | ctx->ocount = ctx->obufsize - zout->avail_out; | |
567 | } | |
568 | } | |
8931b30d DSH |
569 | |
570 | static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr) | |
0f113f3e MC |
571 | { |
572 | BIO_ZLIB_CTX *ctx; | |
573 | int ret, *ip; | |
574 | int ibs, obs; | |
575 | if (!b->next_bio) | |
576 | return 0; | |
577 | ctx = (BIO_ZLIB_CTX *) b->ptr; | |
578 | switch (cmd) { | |
579 | ||
580 | case BIO_CTRL_RESET: | |
581 | ctx->ocount = 0; | |
582 | ctx->odone = 0; | |
583 | ret = 1; | |
584 | break; | |
585 | ||
586 | case BIO_CTRL_FLUSH: | |
587 | ret = bio_zlib_flush(b); | |
588 | if (ret > 0) | |
589 | ret = BIO_flush(b->next_bio); | |
590 | break; | |
591 | ||
592 | case BIO_C_SET_BUFF_SIZE: | |
593 | ibs = -1; | |
594 | obs = -1; | |
595 | if (ptr != NULL) { | |
596 | ip = ptr; | |
597 | if (*ip == 0) | |
598 | ibs = (int)num; | |
599 | else | |
600 | obs = (int)num; | |
601 | } else { | |
602 | ibs = (int)num; | |
603 | obs = ibs; | |
604 | } | |
605 | ||
606 | if (ibs != -1) { | |
b548a1f1 RS |
607 | OPENSSL_free(ctx->ibuf); |
608 | ctx->ibuf = NULL; | |
0f113f3e MC |
609 | ctx->ibufsize = ibs; |
610 | } | |
611 | ||
612 | if (obs != -1) { | |
b548a1f1 RS |
613 | OPENSSL_free(ctx->obuf); |
614 | ctx->obuf = NULL; | |
0f113f3e MC |
615 | ctx->obufsize = obs; |
616 | } | |
617 | ret = 1; | |
618 | break; | |
619 | ||
620 | case BIO_C_DO_STATE_MACHINE: | |
621 | BIO_clear_retry_flags(b); | |
622 | ret = BIO_ctrl(b->next_bio, cmd, num, ptr); | |
623 | BIO_copy_next_retry(b); | |
624 | break; | |
625 | ||
626 | default: | |
627 | ret = BIO_ctrl(b->next_bio, cmd, num, ptr); | |
628 | break; | |
629 | ||
630 | } | |
8931b30d | 631 | |
0f113f3e MC |
632 | return ret; |
633 | } | |
8931b30d DSH |
634 | |
635 | static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) | |
0f113f3e MC |
636 | { |
637 | if (!b->next_bio) | |
638 | return 0; | |
639 | return BIO_callback_ctrl(b->next_bio, cmd, fp); | |
640 | } | |
8931b30d DSH |
641 | |
642 | #endif |