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Commit | Line | Data |
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62867571 | 1 | /* |
da1c088f | 2 | * Copyright 1998-2023 The OpenSSL Project Authors. All Rights Reserved. |
9a555706 | 3 | * |
48f66f81 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
5 | * this file except in compliance with the License. You can obtain a copy |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
9a555706 RS |
8 | */ |
9 | ||
dfeab068 RE |
10 | #include <stdio.h> |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
ec577822 | 13 | #include <openssl/objects.h> |
02a247e0 | 14 | #include "internal/comp.h" |
bdbc9b4d | 15 | #include <openssl/err.h> |
25f2138b | 16 | #include "crypto/cryptlib.h" |
222e620b | 17 | #include "internal/bio.h" |
309c6fba | 18 | #include "internal/thread_once.h" |
706457b7 | 19 | #include "comp_local.h" |
dfeab068 | 20 | |
0f113f3e MC |
21 | COMP_METHOD *COMP_zlib(void); |
22 | ||
59d21298 | 23 | #ifdef OPENSSL_NO_ZLIB |
0f113f3e | 24 | # undef ZLIB_SHARED |
c4438dc0 | 25 | #else |
dfeab068 | 26 | |
0f113f3e | 27 | # include <zlib.h> |
dfeab068 | 28 | |
86a62cf1 RL |
29 | static int zlib_stateful_init(COMP_CTX *ctx); |
30 | static void zlib_stateful_finish(COMP_CTX *ctx); | |
7e3cacac TS |
31 | static ossl_ssize_t zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out, |
32 | size_t olen, unsigned char *in, | |
33 | size_t ilen); | |
34 | static ossl_ssize_t zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out, | |
35 | size_t olen, unsigned char *in, | |
36 | size_t ilen); | |
30e5e8ac | 37 | |
0d4fb843 | 38 | /* memory allocations functions for zlib initialisation */ |
0f113f3e | 39 | static void *zlib_zalloc(void *opaque, unsigned int no, unsigned int size) |
30e5e8ac | 40 | { |
0f113f3e | 41 | void *p; |
30e5e8ac | 42 | |
b51bce94 | 43 | p = OPENSSL_zalloc(no * size); |
0f113f3e MC |
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, | |
121ee399 | 59 | zlib_stateful_expand_block |
0f113f3e MC |
60 | }; |
61 | ||
62 | /* | |
20f88b9b RL |
63 | * When OpenSSL is built on Windows, we do not want to require that |
64 | * the ZLIB.DLL be available in order for the OpenSSL DLLs to | |
65 | * work. Therefore, all ZLIB routines are loaded at run time | |
ad2695b1 | 66 | * and we do not link to a .LIB file when ZLIB_SHARED is set. |
20f88b9b | 67 | */ |
0f113f3e MC |
68 | # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) |
69 | # include <windows.h> | |
70 | # endif /* !(OPENSSL_SYS_WINDOWS || | |
71 | * OPENSSL_SYS_WIN32) */ | |
c4438dc0 | 72 | |
0f113f3e | 73 | # ifdef ZLIB_SHARED |
921de151 | 74 | # include "internal/dso.h" |
20f88b9b | 75 | |
20f88b9b | 76 | /* Function pointers */ |
3840271e | 77 | typedef int (*compress_ft) (Bytef *dest, uLongf *destLen, |
0f113f3e | 78 | const Bytef *source, uLong sourceLen); |
3840271e TS |
79 | typedef int (*uncompress_ft) (Bytef *dest, uLongf *destLen, |
80 | const Bytef *source, uLong sourceLen); | |
0f113f3e MC |
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; | |
3840271e | 91 | static uncompress_ft p_uncompress = NULL; |
0f113f3e MC |
92 | static inflateEnd_ft p_inflateEnd = NULL; |
93 | static inflate_ft p_inflate = NULL; | |
94 | static inflateInit__ft p_inflateInit_ = NULL; | |
95 | static deflateEnd_ft p_deflateEnd = NULL; | |
96 | static deflate_ft p_deflate = NULL; | |
97 | static deflateInit__ft p_deflateInit_ = NULL; | |
98 | static zError__ft p_zError = NULL; | |
20f88b9b | 99 | |
c4438dc0 | 100 | static DSO *zlib_dso = NULL; |
20f88b9b | 101 | |
0f113f3e | 102 | # define compress p_compress |
3840271e | 103 | # define uncompress p_uncompress |
0f113f3e MC |
104 | # define inflateEnd p_inflateEnd |
105 | # define inflate p_inflate | |
106 | # define inflateInit_ p_inflateInit_ | |
107 | # define deflateEnd p_deflateEnd | |
108 | # define deflate p_deflate | |
109 | # define deflateInit_ p_deflateInit_ | |
110 | # define zError p_zError | |
111 | # endif /* ZLIB_SHARED */ | |
112 | ||
113 | struct zlib_state { | |
114 | z_stream istream; | |
115 | z_stream ostream; | |
116 | }; | |
86a62cf1 | 117 | |
86a62cf1 | 118 | static int zlib_stateful_init(COMP_CTX *ctx) |
0f113f3e MC |
119 | { |
120 | int err; | |
64b25758 | 121 | struct zlib_state *state = OPENSSL_zalloc(sizeof(*state)); |
0f113f3e MC |
122 | |
123 | if (state == NULL) | |
124 | goto err; | |
125 | ||
126 | state->istream.zalloc = zlib_zalloc; | |
127 | state->istream.zfree = zlib_zfree; | |
128 | state->istream.opaque = Z_NULL; | |
129 | state->istream.next_in = Z_NULL; | |
130 | state->istream.next_out = Z_NULL; | |
0f113f3e MC |
131 | err = inflateInit_(&state->istream, ZLIB_VERSION, sizeof(z_stream)); |
132 | if (err != Z_OK) | |
133 | goto err; | |
134 | ||
135 | state->ostream.zalloc = zlib_zalloc; | |
136 | state->ostream.zfree = zlib_zfree; | |
137 | state->ostream.opaque = Z_NULL; | |
138 | state->ostream.next_in = Z_NULL; | |
139 | state->ostream.next_out = Z_NULL; | |
0f113f3e MC |
140 | err = deflateInit_(&state->ostream, Z_DEFAULT_COMPRESSION, |
141 | ZLIB_VERSION, sizeof(z_stream)); | |
142 | if (err != Z_OK) | |
143 | goto err; | |
144 | ||
121ee399 | 145 | ctx->data = state; |
0f113f3e | 146 | return 1; |
86a62cf1 | 147 | err: |
b548a1f1 | 148 | OPENSSL_free(state); |
0f113f3e MC |
149 | return 0; |
150 | } | |
86a62cf1 RL |
151 | |
152 | static void zlib_stateful_finish(COMP_CTX *ctx) | |
0f113f3e | 153 | { |
121ee399 | 154 | struct zlib_state *state = ctx->data; |
0f113f3e MC |
155 | inflateEnd(&state->istream); |
156 | deflateEnd(&state->ostream); | |
157 | OPENSSL_free(state); | |
0f113f3e | 158 | } |
86a62cf1 | 159 | |
7e3cacac TS |
160 | static ossl_ssize_t zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out, |
161 | size_t olen, unsigned char *in, | |
162 | size_t ilen) | |
0f113f3e MC |
163 | { |
164 | int err = Z_OK; | |
121ee399 | 165 | struct zlib_state *state = ctx->data; |
0f113f3e MC |
166 | |
167 | if (state == NULL) | |
168 | return -1; | |
169 | ||
170 | state->ostream.next_in = in; | |
171 | state->ostream.avail_in = ilen; | |
172 | state->ostream.next_out = out; | |
173 | state->ostream.avail_out = olen; | |
174 | if (ilen > 0) | |
175 | err = deflate(&state->ostream, Z_SYNC_FLUSH); | |
176 | if (err != Z_OK) | |
177 | return -1; | |
7e3cacac TS |
178 | if (state->ostream.avail_out > olen) |
179 | return -1; | |
180 | return (ossl_ssize_t)(olen - state->ostream.avail_out); | |
0f113f3e | 181 | } |
86a62cf1 | 182 | |
7e3cacac TS |
183 | static ossl_ssize_t zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out, |
184 | size_t olen, unsigned char *in, | |
185 | size_t ilen) | |
0f113f3e MC |
186 | { |
187 | int err = Z_OK; | |
121ee399 | 188 | struct zlib_state *state = ctx->data; |
0f113f3e MC |
189 | |
190 | if (state == NULL) | |
191 | return 0; | |
192 | ||
193 | state->istream.next_in = in; | |
194 | state->istream.avail_in = ilen; | |
195 | state->istream.next_out = out; | |
196 | state->istream.avail_out = olen; | |
197 | if (ilen > 0) | |
198 | err = inflate(&state->istream, Z_SYNC_FLUSH); | |
199 | if (err != Z_OK) | |
200 | return -1; | |
7e3cacac TS |
201 | if (state->istream.avail_out > olen) |
202 | return -1; | |
203 | return (ossl_ssize_t)(olen - state->istream.avail_out); | |
0f113f3e | 204 | } |
86a62cf1 | 205 | |
3840271e TS |
206 | /* ONESHOT COMPRESSION/DECOMPRESSION */ |
207 | ||
208 | static int zlib_oneshot_init(COMP_CTX *ctx) | |
209 | { | |
210 | return 1; | |
211 | } | |
212 | ||
213 | static void zlib_oneshot_finish(COMP_CTX *ctx) | |
214 | { | |
215 | } | |
216 | ||
217 | static ossl_ssize_t zlib_oneshot_compress_block(COMP_CTX *ctx, unsigned char *out, | |
218 | size_t olen, unsigned char *in, | |
219 | size_t ilen) | |
220 | { | |
221 | uLongf out_size; | |
222 | ||
223 | if (ilen == 0) | |
224 | return 0; | |
225 | ||
226 | /* zlib's uLongf defined as unsigned long FAR */ | |
227 | if (olen > ULONG_MAX) | |
228 | return -1; | |
229 | out_size = (uLongf)olen; | |
230 | ||
231 | if (compress(out, &out_size, in, ilen) != Z_OK) | |
232 | return -1; | |
233 | ||
234 | if (out_size > OSSL_SSIZE_MAX) | |
235 | return -1; | |
236 | return (ossl_ssize_t)out_size; | |
237 | } | |
238 | ||
239 | static ossl_ssize_t zlib_oneshot_expand_block(COMP_CTX *ctx, unsigned char *out, | |
240 | size_t olen, unsigned char *in, | |
241 | size_t ilen) | |
242 | { | |
243 | uLongf out_size; | |
244 | ||
245 | if (ilen == 0) | |
246 | return 0; | |
247 | ||
248 | /* zlib's uLongf defined as unsigned long FAR */ | |
249 | if (olen > ULONG_MAX) | |
250 | return -1; | |
251 | out_size = (uLongf)olen; | |
252 | ||
253 | if (uncompress(out, &out_size, in, ilen) != Z_OK) | |
254 | return -1; | |
255 | ||
256 | if (out_size > OSSL_SSIZE_MAX) | |
257 | return -1; | |
258 | return (ossl_ssize_t)out_size; | |
259 | } | |
260 | ||
261 | static COMP_METHOD zlib_oneshot_method = { | |
262 | NID_zlib_compression, | |
263 | LN_zlib_compression, | |
264 | zlib_oneshot_init, | |
265 | zlib_oneshot_finish, | |
266 | zlib_oneshot_compress_block, | |
267 | zlib_oneshot_expand_block | |
268 | }; | |
269 | ||
309c6fba TS |
270 | static CRYPTO_ONCE zlib_once = CRYPTO_ONCE_STATIC_INIT; |
271 | DEFINE_RUN_ONCE_STATIC(ossl_comp_zlib_init) | |
0f113f3e | 272 | { |
309c6fba | 273 | # ifdef ZLIB_SHARED |
5a5c0b95 | 274 | /* LIBZ may be externally defined, and we should respect that value */ |
309c6fba TS |
275 | # ifndef LIBZ |
276 | # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) | |
277 | # define LIBZ "ZLIB1" | |
278 | # elif defined(OPENSSL_SYS_VMS) | |
279 | # define LIBZ "LIBZ" | |
280 | # else | |
281 | # define LIBZ "z" | |
282 | # endif | |
5a5c0b95 | 283 | # endif |
5a5c0b95 | 284 | |
309c6fba TS |
285 | zlib_dso = DSO_load(NULL, LIBZ, NULL, 0); |
286 | if (zlib_dso != NULL) { | |
287 | p_compress = (compress_ft) DSO_bind_func(zlib_dso, "compress"); | |
3840271e | 288 | p_uncompress = (compress_ft) DSO_bind_func(zlib_dso, "uncompress"); |
309c6fba TS |
289 | p_inflateEnd = (inflateEnd_ft) DSO_bind_func(zlib_dso, "inflateEnd"); |
290 | p_inflate = (inflate_ft) DSO_bind_func(zlib_dso, "inflate"); | |
291 | p_inflateInit_ = (inflateInit__ft) DSO_bind_func(zlib_dso, "inflateInit_"); | |
292 | p_deflateEnd = (deflateEnd_ft) DSO_bind_func(zlib_dso, "deflateEnd"); | |
293 | p_deflate = (deflate_ft) DSO_bind_func(zlib_dso, "deflate"); | |
294 | p_deflateInit_ = (deflateInit__ft) DSO_bind_func(zlib_dso, "deflateInit_"); | |
295 | p_zError = (zError__ft) DSO_bind_func(zlib_dso, "zError"); | |
296 | ||
3840271e | 297 | if (p_compress == NULL || p_uncompress == NULL || p_inflateEnd == NULL |
309c6fba TS |
298 | || p_inflate == NULL || p_inflateInit_ == NULL |
299 | || p_deflateEnd == NULL || p_deflate == NULL | |
300 | || p_deflateInit_ == NULL || p_zError == NULL) { | |
301 | ossl_comp_zlib_cleanup(); | |
302 | return 0; | |
0f113f3e MC |
303 | } |
304 | } | |
309c6fba TS |
305 | # endif |
306 | return 1; | |
307 | } | |
e984b2af | 308 | #endif |
309c6fba TS |
309 | |
310 | COMP_METHOD *COMP_zlib(void) | |
311 | { | |
7e3cacac | 312 | COMP_METHOD *meth = NULL; |
309c6fba | 313 | |
59d21298 | 314 | #ifndef OPENSSL_NO_ZLIB |
309c6fba TS |
315 | if (RUN_ONCE(&zlib_once, ossl_comp_zlib_init)) |
316 | meth = &zlib_stateful_method; | |
20f88b9b RL |
317 | #endif |
318 | ||
26a7d938 | 319 | return meth; |
0f113f3e | 320 | } |
20f88b9b | 321 | |
3840271e TS |
322 | COMP_METHOD *COMP_zlib_oneshot(void) |
323 | { | |
324 | COMP_METHOD *meth = NULL; | |
325 | ||
326 | #ifndef OPENSSL_NO_ZLIB | |
327 | if (RUN_ONCE(&zlib_once, ossl_comp_zlib_init)) | |
328 | meth = &zlib_oneshot_method; | |
329 | #endif | |
330 | ||
331 | return meth; | |
332 | } | |
333 | ||
309c6fba | 334 | /* Also called from OPENSSL_cleanup() */ |
f148f703 | 335 | void ossl_comp_zlib_cleanup(void) |
0f113f3e | 336 | { |
8931b30d | 337 | #ifdef ZLIB_SHARED |
1b6fa9fd | 338 | DSO_free(zlib_dso); |
8cbb1533 | 339 | zlib_dso = NULL; |
8931b30d | 340 | #endif |
0f113f3e | 341 | } |
8931b30d | 342 | |
59d21298 | 343 | #ifndef OPENSSL_NO_ZLIB |
8931b30d DSH |
344 | |
345 | /* Zlib based compression/decompression filter BIO */ | |
346 | ||
0f113f3e MC |
347 | typedef struct { |
348 | unsigned char *ibuf; /* Input buffer */ | |
349 | int ibufsize; /* Buffer size */ | |
350 | z_stream zin; /* Input decompress context */ | |
351 | unsigned char *obuf; /* Output buffer */ | |
352 | int obufsize; /* Output buffer size */ | |
353 | unsigned char *optr; /* Position in output buffer */ | |
354 | int ocount; /* Amount of data in output buffer */ | |
355 | int odone; /* deflate EOF */ | |
356 | int comp_level; /* Compression level to use */ | |
357 | z_stream zout; /* Output compression context */ | |
358 | } BIO_ZLIB_CTX; | |
359 | ||
360 | # define ZLIB_DEFAULT_BUFSIZE 1024 | |
8931b30d DSH |
361 | |
362 | static int bio_zlib_new(BIO *bi); | |
363 | static int bio_zlib_free(BIO *bi); | |
364 | static int bio_zlib_read(BIO *b, char *out, int outl); | |
365 | static int bio_zlib_write(BIO *b, const char *in, int inl); | |
366 | static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr); | |
fce78bd4 | 367 | static long bio_zlib_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp); |
8931b30d | 368 | |
04f6b0fd | 369 | static const BIO_METHOD bio_meth_zlib = { |
0f113f3e MC |
370 | BIO_TYPE_COMP, |
371 | "zlib", | |
513d76f4 | 372 | bwrite_conv, |
0f113f3e | 373 | bio_zlib_write, |
513d76f4 | 374 | bread_conv, |
0f113f3e | 375 | bio_zlib_read, |
b4ff6622 DB |
376 | NULL, /* bio_zlib_puts, */ |
377 | NULL, /* bio_zlib_gets, */ | |
0f113f3e MC |
378 | bio_zlib_ctrl, |
379 | bio_zlib_new, | |
380 | bio_zlib_free, | |
381 | bio_zlib_callback_ctrl | |
382 | }; | |
59d21298 | 383 | #endif |
8931b30d | 384 | |
04f6b0fd | 385 | const BIO_METHOD *BIO_f_zlib(void) |
0f113f3e | 386 | { |
59d21298 TS |
387 | #ifndef OPENSSL_NO_ZLIB |
388 | if (RUN_ONCE(&zlib_once, ossl_comp_zlib_init)) | |
389 | return &bio_meth_zlib; | |
390 | #endif | |
391 | return NULL; | |
0f113f3e | 392 | } |
8931b30d | 393 | |
59d21298 | 394 | #ifndef OPENSSL_NO_ZLIB |
8931b30d | 395 | static int bio_zlib_new(BIO *bi) |
0f113f3e MC |
396 | { |
397 | BIO_ZLIB_CTX *ctx; | |
309c6fba | 398 | |
0f113f3e | 399 | # ifdef ZLIB_SHARED |
309c6fba | 400 | if (!RUN_ONCE(&zlib_once, ossl_comp_zlib_init)) { |
9311d0c4 | 401 | ERR_raise(ERR_LIB_COMP, COMP_R_ZLIB_NOT_SUPPORTED); |
0f113f3e MC |
402 | return 0; |
403 | } | |
404 | # endif | |
64b25758 | 405 | ctx = OPENSSL_zalloc(sizeof(*ctx)); |
e077455e | 406 | if (ctx == NULL) |
0f113f3e | 407 | return 0; |
0f113f3e MC |
408 | ctx->ibufsize = ZLIB_DEFAULT_BUFSIZE; |
409 | ctx->obufsize = ZLIB_DEFAULT_BUFSIZE; | |
410 | ctx->zin.zalloc = Z_NULL; | |
411 | ctx->zin.zfree = Z_NULL; | |
0f113f3e MC |
412 | ctx->zout.zalloc = Z_NULL; |
413 | ctx->zout.zfree = Z_NULL; | |
0f113f3e | 414 | ctx->comp_level = Z_DEFAULT_COMPRESSION; |
222e620b MC |
415 | BIO_set_init(bi, 1); |
416 | BIO_set_data(bi, ctx); | |
417 | ||
0f113f3e MC |
418 | return 1; |
419 | } | |
8931b30d DSH |
420 | |
421 | static int bio_zlib_free(BIO *bi) | |
0f113f3e MC |
422 | { |
423 | BIO_ZLIB_CTX *ctx; | |
309c6fba | 424 | |
0f113f3e MC |
425 | if (!bi) |
426 | return 0; | |
222e620b | 427 | ctx = BIO_get_data(bi); |
0f113f3e MC |
428 | if (ctx->ibuf) { |
429 | /* Destroy decompress context */ | |
430 | inflateEnd(&ctx->zin); | |
431 | OPENSSL_free(ctx->ibuf); | |
432 | } | |
433 | if (ctx->obuf) { | |
434 | /* Destroy compress context */ | |
435 | deflateEnd(&ctx->zout); | |
436 | OPENSSL_free(ctx->obuf); | |
437 | } | |
438 | OPENSSL_free(ctx); | |
222e620b MC |
439 | BIO_set_data(bi, NULL); |
440 | BIO_set_init(bi, 0); | |
441 | ||
0f113f3e MC |
442 | return 1; |
443 | } | |
8931b30d DSH |
444 | |
445 | static int bio_zlib_read(BIO *b, char *out, int outl) | |
0f113f3e MC |
446 | { |
447 | BIO_ZLIB_CTX *ctx; | |
448 | int ret; | |
449 | z_stream *zin; | |
222e620b MC |
450 | BIO *next = BIO_next(b); |
451 | ||
0f113f3e MC |
452 | if (!out || !outl) |
453 | return 0; | |
222e620b | 454 | ctx = BIO_get_data(b); |
0f113f3e MC |
455 | zin = &ctx->zin; |
456 | BIO_clear_retry_flags(b); | |
457 | if (!ctx->ibuf) { | |
458 | ctx->ibuf = OPENSSL_malloc(ctx->ibufsize); | |
e077455e | 459 | if (ctx->ibuf == NULL) |
0f113f3e | 460 | return 0; |
73a815de P |
461 | if ((ret = inflateInit(zin)) != Z_OK) { |
462 | ERR_raise_data(ERR_LIB_COMP, COMP_R_ZLIB_INFLATE_ERROR, | |
463 | "zlib error: %s", zError(ret)); | |
464 | return 0; | |
465 | } | |
0f113f3e MC |
466 | zin->next_in = ctx->ibuf; |
467 | zin->avail_in = 0; | |
468 | } | |
469 | ||
470 | /* Copy output data directly to supplied buffer */ | |
471 | zin->next_out = (unsigned char *)out; | |
472 | zin->avail_out = (unsigned int)outl; | |
473 | for (;;) { | |
474 | /* Decompress while data available */ | |
475 | while (zin->avail_in) { | |
476 | ret = inflate(zin, 0); | |
477 | if ((ret != Z_OK) && (ret != Z_STREAM_END)) { | |
a150f8e1 RL |
478 | ERR_raise_data(ERR_LIB_COMP, COMP_R_ZLIB_INFLATE_ERROR, |
479 | "zlib error: %s", zError(ret)); | |
0f113f3e MC |
480 | return 0; |
481 | } | |
482 | /* If EOF or we've read everything then return */ | |
483 | if ((ret == Z_STREAM_END) || !zin->avail_out) | |
484 | return outl - zin->avail_out; | |
485 | } | |
486 | ||
487 | /* | |
488 | * No data in input buffer try to read some in, if an error then | |
489 | * return the total data read. | |
490 | */ | |
222e620b | 491 | ret = BIO_read(next, ctx->ibuf, ctx->ibufsize); |
0f113f3e MC |
492 | if (ret <= 0) { |
493 | /* Total data read */ | |
494 | int tot = outl - zin->avail_out; | |
495 | BIO_copy_next_retry(b); | |
496 | if (ret < 0) | |
497 | return (tot > 0) ? tot : ret; | |
498 | return tot; | |
499 | } | |
500 | zin->avail_in = ret; | |
501 | zin->next_in = ctx->ibuf; | |
502 | } | |
503 | } | |
8931b30d DSH |
504 | |
505 | static int bio_zlib_write(BIO *b, const char *in, int inl) | |
0f113f3e MC |
506 | { |
507 | BIO_ZLIB_CTX *ctx; | |
508 | int ret; | |
509 | z_stream *zout; | |
222e620b MC |
510 | BIO *next = BIO_next(b); |
511 | ||
0f113f3e MC |
512 | if (!in || !inl) |
513 | return 0; | |
222e620b | 514 | ctx = BIO_get_data(b); |
0f113f3e MC |
515 | if (ctx->odone) |
516 | return 0; | |
517 | zout = &ctx->zout; | |
518 | BIO_clear_retry_flags(b); | |
519 | if (!ctx->obuf) { | |
520 | ctx->obuf = OPENSSL_malloc(ctx->obufsize); | |
521 | /* Need error here */ | |
e077455e | 522 | if (ctx->obuf == NULL) |
0f113f3e | 523 | return 0; |
0f113f3e MC |
524 | ctx->optr = ctx->obuf; |
525 | ctx->ocount = 0; | |
73a815de P |
526 | if ((ret = deflateInit(zout, ctx->comp_level)) != Z_OK) { |
527 | ERR_raise_data(ERR_LIB_COMP, COMP_R_ZLIB_DEFLATE_ERROR, | |
528 | "zlib error: %s", zError(ret)); | |
529 | return 0; | |
530 | } | |
0f113f3e MC |
531 | zout->next_out = ctx->obuf; |
532 | zout->avail_out = ctx->obufsize; | |
533 | } | |
534 | /* Obtain input data directly from supplied buffer */ | |
535 | zout->next_in = (void *)in; | |
536 | zout->avail_in = inl; | |
537 | for (;;) { | |
538 | /* If data in output buffer write it first */ | |
539 | while (ctx->ocount) { | |
222e620b | 540 | ret = BIO_write(next, ctx->optr, ctx->ocount); |
0f113f3e MC |
541 | if (ret <= 0) { |
542 | /* Total data written */ | |
543 | int tot = inl - zout->avail_in; | |
544 | BIO_copy_next_retry(b); | |
545 | if (ret < 0) | |
546 | return (tot > 0) ? tot : ret; | |
547 | return tot; | |
548 | } | |
549 | ctx->optr += ret; | |
550 | ctx->ocount -= ret; | |
551 | } | |
552 | ||
553 | /* Have we consumed all supplied data? */ | |
554 | if (!zout->avail_in) | |
555 | return inl; | |
556 | ||
557 | /* Compress some more */ | |
558 | ||
559 | /* Reset buffer */ | |
560 | ctx->optr = ctx->obuf; | |
561 | zout->next_out = ctx->obuf; | |
562 | zout->avail_out = ctx->obufsize; | |
563 | /* Compress some more */ | |
564 | ret = deflate(zout, 0); | |
565 | if (ret != Z_OK) { | |
a150f8e1 RL |
566 | ERR_raise_data(ERR_LIB_COMP, COMP_R_ZLIB_DEFLATE_ERROR, |
567 | "zlib error: %s", zError(ret)); | |
0f113f3e MC |
568 | return 0; |
569 | } | |
570 | ctx->ocount = ctx->obufsize - zout->avail_out; | |
571 | } | |
572 | } | |
8931b30d DSH |
573 | |
574 | static int bio_zlib_flush(BIO *b) | |
0f113f3e MC |
575 | { |
576 | BIO_ZLIB_CTX *ctx; | |
577 | int ret; | |
578 | z_stream *zout; | |
222e620b MC |
579 | BIO *next = BIO_next(b); |
580 | ||
581 | ctx = BIO_get_data(b); | |
0f113f3e MC |
582 | /* If no data written or already flush show success */ |
583 | if (!ctx->obuf || (ctx->odone && !ctx->ocount)) | |
584 | return 1; | |
585 | zout = &ctx->zout; | |
586 | BIO_clear_retry_flags(b); | |
587 | /* No more input data */ | |
588 | zout->next_in = NULL; | |
589 | zout->avail_in = 0; | |
590 | for (;;) { | |
591 | /* If data in output buffer write it first */ | |
592 | while (ctx->ocount) { | |
222e620b | 593 | ret = BIO_write(next, ctx->optr, ctx->ocount); |
0f113f3e MC |
594 | if (ret <= 0) { |
595 | BIO_copy_next_retry(b); | |
596 | return ret; | |
597 | } | |
598 | ctx->optr += ret; | |
599 | ctx->ocount -= ret; | |
600 | } | |
601 | if (ctx->odone) | |
602 | return 1; | |
603 | ||
604 | /* Compress some more */ | |
605 | ||
606 | /* Reset buffer */ | |
607 | ctx->optr = ctx->obuf; | |
608 | zout->next_out = ctx->obuf; | |
609 | zout->avail_out = ctx->obufsize; | |
610 | /* Compress some more */ | |
611 | ret = deflate(zout, Z_FINISH); | |
612 | if (ret == Z_STREAM_END) | |
613 | ctx->odone = 1; | |
614 | else if (ret != Z_OK) { | |
a150f8e1 RL |
615 | ERR_raise_data(ERR_LIB_COMP, COMP_R_ZLIB_DEFLATE_ERROR, |
616 | "zlib error: %s", zError(ret)); | |
0f113f3e MC |
617 | return 0; |
618 | } | |
619 | ctx->ocount = ctx->obufsize - zout->avail_out; | |
620 | } | |
621 | } | |
8931b30d DSH |
622 | |
623 | static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr) | |
0f113f3e MC |
624 | { |
625 | BIO_ZLIB_CTX *ctx; | |
626 | int ret, *ip; | |
627 | int ibs, obs; | |
222e620b MC |
628 | BIO *next = BIO_next(b); |
629 | ||
630 | if (next == NULL) | |
0f113f3e | 631 | return 0; |
222e620b | 632 | ctx = BIO_get_data(b); |
0f113f3e MC |
633 | switch (cmd) { |
634 | ||
635 | case BIO_CTRL_RESET: | |
636 | ctx->ocount = 0; | |
637 | ctx->odone = 0; | |
638 | ret = 1; | |
639 | break; | |
640 | ||
641 | case BIO_CTRL_FLUSH: | |
642 | ret = bio_zlib_flush(b); | |
bcbc7d60 | 643 | if (ret > 0) { |
222e620b | 644 | ret = BIO_flush(next); |
bcbc7d60 | 645 | BIO_copy_next_retry(b); |
646 | } | |
0f113f3e MC |
647 | break; |
648 | ||
649 | case BIO_C_SET_BUFF_SIZE: | |
650 | ibs = -1; | |
651 | obs = -1; | |
652 | if (ptr != NULL) { | |
653 | ip = ptr; | |
654 | if (*ip == 0) | |
655 | ibs = (int)num; | |
656 | else | |
657 | obs = (int)num; | |
658 | } else { | |
659 | ibs = (int)num; | |
660 | obs = ibs; | |
661 | } | |
662 | ||
663 | if (ibs != -1) { | |
b548a1f1 RS |
664 | OPENSSL_free(ctx->ibuf); |
665 | ctx->ibuf = NULL; | |
0f113f3e MC |
666 | ctx->ibufsize = ibs; |
667 | } | |
668 | ||
669 | if (obs != -1) { | |
b548a1f1 RS |
670 | OPENSSL_free(ctx->obuf); |
671 | ctx->obuf = NULL; | |
0f113f3e MC |
672 | ctx->obufsize = obs; |
673 | } | |
674 | ret = 1; | |
675 | break; | |
676 | ||
677 | case BIO_C_DO_STATE_MACHINE: | |
678 | BIO_clear_retry_flags(b); | |
222e620b | 679 | ret = BIO_ctrl(next, cmd, num, ptr); |
0f113f3e MC |
680 | BIO_copy_next_retry(b); |
681 | break; | |
682 | ||
6beb8b39 TM |
683 | case BIO_CTRL_WPENDING: |
684 | if (ctx->obuf == NULL) | |
685 | return 0; | |
686 | ||
687 | if (ctx->odone) { | |
688 | ret = ctx->ocount; | |
689 | } else { | |
690 | ret = ctx->ocount; | |
691 | if (ret == 0) | |
692 | /* Unknown amount pending but we are not finished */ | |
693 | ret = 1; | |
694 | } | |
695 | if (ret == 0) | |
696 | ret = BIO_ctrl(next, cmd, num, ptr); | |
697 | break; | |
698 | ||
699 | case BIO_CTRL_PENDING: | |
700 | ret = ctx->zin.avail_in; | |
701 | if (ret == 0) | |
702 | ret = BIO_ctrl(next, cmd, num, ptr); | |
703 | break; | |
704 | ||
0f113f3e | 705 | default: |
222e620b | 706 | ret = BIO_ctrl(next, cmd, num, ptr); |
0f113f3e MC |
707 | break; |
708 | ||
709 | } | |
8931b30d | 710 | |
0f113f3e MC |
711 | return ret; |
712 | } | |
8931b30d | 713 | |
fce78bd4 | 714 | static long bio_zlib_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp) |
0f113f3e | 715 | { |
222e620b | 716 | BIO *next = BIO_next(b); |
309c6fba | 717 | |
222e620b | 718 | if (next == NULL) |
0f113f3e | 719 | return 0; |
222e620b | 720 | return BIO_callback_ctrl(next, cmd, fp); |
0f113f3e | 721 | } |
8931b30d DSH |
722 | |
723 | #endif |