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Diffstat (limited to 'src/lib/libcrypto/comp/c_zlib.c')
-rw-r--r--src/lib/libcrypto/comp/c_zlib.c600
1 files changed, 7 insertions, 593 deletions
diff --git a/src/lib/libcrypto/comp/c_zlib.c b/src/lib/libcrypto/comp/c_zlib.c
index 0f34597e70..5fcb521ffb 100644
--- a/src/lib/libcrypto/comp/c_zlib.c
+++ b/src/lib/libcrypto/comp/c_zlib.c
@@ -24,32 +24,6 @@ static COMP_METHOD zlib_method_nozlib={
24 24
25#include <zlib.h> 25#include <zlib.h>
26 26
27static int zlib_stateful_init(COMP_CTX *ctx);
28static void zlib_stateful_finish(COMP_CTX *ctx);
29static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out,
30 unsigned int olen, unsigned char *in, unsigned int ilen);
31static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out,
32 unsigned int olen, unsigned char *in, unsigned int ilen);
33
34
35/* memory allocations functions for zlib intialization */
36static void* zlib_zalloc(void* opaque, unsigned int no, unsigned int size)
37{
38 void *p;
39
40 p=OPENSSL_malloc(no*size);
41 if (p)
42 memset(p, 0, no*size);
43 return p;
44}
45
46
47static void zlib_zfree(void* opaque, void* address)
48{
49 OPENSSL_free(address);
50}
51
52#if 0
53static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out, 27static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out,
54 unsigned int olen, unsigned char *in, unsigned int ilen); 28 unsigned int olen, unsigned char *in, unsigned int ilen);
55static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out, 29static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out,
@@ -58,7 +32,7 @@ static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out,
58static int zz_uncompress(Bytef *dest, uLongf *destLen, const Bytef *source, 32static int zz_uncompress(Bytef *dest, uLongf *destLen, const Bytef *source,
59 uLong sourceLen); 33 uLong sourceLen);
60 34
61static COMP_METHOD zlib_stateless_method={ 35static COMP_METHOD zlib_method={
62 NID_zlib_compression, 36 NID_zlib_compression,
63 LN_zlib_compression, 37 LN_zlib_compression,
64 NULL, 38 NULL,
@@ -68,24 +42,12 @@ static COMP_METHOD zlib_stateless_method={
68 NULL, 42 NULL,
69 NULL, 43 NULL,
70 }; 44 };
71#endif
72
73static COMP_METHOD zlib_stateful_method={
74 NID_zlib_compression,
75 LN_zlib_compression,
76 zlib_stateful_init,
77 zlib_stateful_finish,
78 zlib_stateful_compress_block,
79 zlib_stateful_expand_block,
80 NULL,
81 NULL,
82 };
83 45
84/* 46/*
85 * When OpenSSL is built on Windows, we do not want to require that 47 * When OpenSSL is built on Windows, we do not want to require that
86 * the ZLIB.DLL be available in order for the OpenSSL DLLs to 48 * the ZLIB.DLL be available in order for the OpenSSL DLLs to
87 * work. Therefore, all ZLIB routines are loaded at run time 49 * work. Therefore, all ZLIB routines are loaded at run time
88 * and we do not link to a .LIB file when ZLIB_SHARED is set. 50 * and we do not link to a .LIB file.
89 */ 51 */
90#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) 52#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
91# include <windows.h> 53# include <windows.h>
@@ -101,19 +63,10 @@ typedef int (*inflateEnd_ft)(z_streamp strm);
101typedef int (*inflate_ft)(z_streamp strm, int flush); 63typedef int (*inflate_ft)(z_streamp strm, int flush);
102typedef int (*inflateInit__ft)(z_streamp strm, 64typedef int (*inflateInit__ft)(z_streamp strm,
103 const char * version, int stream_size); 65 const char * version, int stream_size);
104typedef int (*deflateEnd_ft)(z_streamp strm);
105typedef int (*deflate_ft)(z_streamp strm, int flush);
106typedef int (*deflateInit__ft)(z_streamp strm, int level,
107 const char * version, int stream_size);
108typedef const char * (*zError__ft)(int err);
109static compress_ft p_compress=NULL; 66static compress_ft p_compress=NULL;
110static inflateEnd_ft p_inflateEnd=NULL; 67static inflateEnd_ft p_inflateEnd=NULL;
111static inflate_ft p_inflate=NULL; 68static inflate_ft p_inflate=NULL;
112static inflateInit__ft p_inflateInit_=NULL; 69static inflateInit__ft p_inflateInit_=NULL;
113static deflateEnd_ft p_deflateEnd=NULL;
114static deflate_ft p_deflate=NULL;
115static deflateInit__ft p_deflateInit_=NULL;
116static zError__ft p_zError=NULL;
117 70
118static int zlib_loaded = 0; /* only attempt to init func pts once */ 71static int zlib_loaded = 0; /* only attempt to init func pts once */
119static DSO *zlib_dso = NULL; 72static DSO *zlib_dso = NULL;
@@ -122,133 +75,10 @@ static DSO *zlib_dso = NULL;
122#define inflateEnd p_inflateEnd 75#define inflateEnd p_inflateEnd
123#define inflate p_inflate 76#define inflate p_inflate
124#define inflateInit_ p_inflateInit_ 77#define inflateInit_ p_inflateInit_
125#define deflateEnd p_deflateEnd
126#define deflate p_deflate
127#define deflateInit_ p_deflateInit_
128#define zError p_zError
129#endif /* ZLIB_SHARED */ 78#endif /* ZLIB_SHARED */
130 79
131struct zlib_state
132 {
133 z_stream istream;
134 z_stream ostream;
135 };
136
137static int zlib_stateful_ex_idx = -1;
138
139static void zlib_stateful_free_ex_data(void *obj, void *item,
140 CRYPTO_EX_DATA *ad, int ind,long argl, void *argp)
141 {
142 struct zlib_state *state = (struct zlib_state *)item;
143 inflateEnd(&state->istream);
144 deflateEnd(&state->ostream);
145 OPENSSL_free(state);
146 }
147
148static int zlib_stateful_init(COMP_CTX *ctx)
149 {
150 int err;
151 struct zlib_state *state =
152 (struct zlib_state *)OPENSSL_malloc(sizeof(struct zlib_state));
153
154 if (state == NULL)
155 goto err;
156
157 state->istream.zalloc = zlib_zalloc;
158 state->istream.zfree = zlib_zfree;
159 state->istream.opaque = Z_NULL;
160 state->istream.next_in = Z_NULL;
161 state->istream.next_out = Z_NULL;
162 state->istream.avail_in = 0;
163 state->istream.avail_out = 0;
164 err = inflateInit_(&state->istream,
165 ZLIB_VERSION, sizeof(z_stream));
166 if (err != Z_OK)
167 goto err;
168
169 state->ostream.zalloc = zlib_zalloc;
170 state->ostream.zfree = zlib_zfree;
171 state->ostream.opaque = Z_NULL;
172 state->ostream.next_in = Z_NULL;
173 state->ostream.next_out = Z_NULL;
174 state->ostream.avail_in = 0;
175 state->ostream.avail_out = 0;
176 err = deflateInit_(&state->ostream,Z_DEFAULT_COMPRESSION,
177 ZLIB_VERSION, sizeof(z_stream));
178 if (err != Z_OK)
179 goto err;
180
181 CRYPTO_new_ex_data(CRYPTO_EX_INDEX_COMP,ctx,&ctx->ex_data);
182 CRYPTO_set_ex_data(&ctx->ex_data,zlib_stateful_ex_idx,state);
183 return 1;
184 err:
185 if (state) OPENSSL_free(state);
186 return 0;
187 }
188
189static void zlib_stateful_finish(COMP_CTX *ctx)
190 {
191 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_COMP,ctx,&ctx->ex_data);
192 }
193
194static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out,
195 unsigned int olen, unsigned char *in, unsigned int ilen)
196 {
197 int err = Z_OK;
198 struct zlib_state *state =
199 (struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data,
200 zlib_stateful_ex_idx);
201
202 if (state == NULL)
203 return -1;
204
205 state->ostream.next_in = in;
206 state->ostream.avail_in = ilen;
207 state->ostream.next_out = out;
208 state->ostream.avail_out = olen;
209 if (ilen > 0)
210 err = deflate(&state->ostream, Z_SYNC_FLUSH);
211 if (err != Z_OK)
212 return -1;
213#ifdef DEBUG_ZLIB
214 fprintf(stderr,"compress(%4d)->%4d %s\n",
215 ilen,olen - state->ostream.avail_out,
216 (ilen != olen - state->ostream.avail_out)?"zlib":"clear");
217#endif
218 return olen - state->ostream.avail_out;
219 }
220
221static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out,
222 unsigned int olen, unsigned char *in, unsigned int ilen)
223 {
224 int err = Z_OK;
225
226 struct zlib_state *state =
227 (struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data,
228 zlib_stateful_ex_idx);
229
230 if (state == NULL)
231 return 0;
232
233 state->istream.next_in = in;
234 state->istream.avail_in = ilen;
235 state->istream.next_out = out;
236 state->istream.avail_out = olen;
237 if (ilen > 0)
238 err = inflate(&state->istream, Z_SYNC_FLUSH);
239 if (err != Z_OK)
240 return -1;
241#ifdef DEBUG_ZLIB
242 fprintf(stderr,"expand(%4d)->%4d %s\n",
243 ilen,olen - state->istream.avail_out,
244 (ilen != olen - state->istream.avail_out)?"zlib":"clear");
245#endif
246 return olen - state->istream.avail_out;
247 }
248
249#if 0
250static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out, 80static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out,
251 unsigned int olen, unsigned char *in, unsigned int ilen) 81 unsigned int olen, unsigned char *in, unsigned int ilen)
252 { 82 {
253 unsigned long l; 83 unsigned long l;
254 int i; 84 int i;
@@ -281,7 +111,7 @@ static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out,
281 } 111 }
282 112
283static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out, 113static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out,
284 unsigned int olen, unsigned char *in, unsigned int ilen) 114 unsigned int olen, unsigned char *in, unsigned int ilen)
285 { 115 {
286 unsigned long l; 116 unsigned long l;
287 int i; 117 int i;
@@ -323,8 +153,7 @@ static int zz_uncompress (Bytef *dest, uLongf *destLen, const Bytef *source,
323 stream.zalloc = (alloc_func)0; 153 stream.zalloc = (alloc_func)0;
324 stream.zfree = (free_func)0; 154 stream.zfree = (free_func)0;
325 155
326 err = inflateInit_(&stream, 156 err = inflateInit(&stream);
327 ZLIB_VERSION, sizeof(z_stream));
328 if (err != Z_OK) return err; 157 if (err != Z_OK) return err;
329 158
330 err = inflate(&stream, Z_FINISH); 159 err = inflate(&stream, Z_FINISH);
@@ -337,7 +166,6 @@ static int zz_uncompress (Bytef *dest, uLongf *destLen, const Bytef *source,
337 err = inflateEnd(&stream); 166 err = inflateEnd(&stream);
338 return err; 167 return err;
339} 168}
340#endif
341 169
342#endif 170#endif
343 171
@@ -367,22 +195,9 @@ COMP_METHOD *COMP_zlib(void)
367 p_inflateInit_ 195 p_inflateInit_
368 = (inflateInit__ft) DSO_bind_func(zlib_dso, 196 = (inflateInit__ft) DSO_bind_func(zlib_dso,
369 "inflateInit_"); 197 "inflateInit_");
370 p_deflateEnd
371 = (deflateEnd_ft) DSO_bind_func(zlib_dso,
372 "deflateEnd");
373 p_deflate
374 = (deflate_ft) DSO_bind_func(zlib_dso,
375 "deflate");
376 p_deflateInit_
377 = (deflateInit__ft) DSO_bind_func(zlib_dso,
378 "deflateInit_");
379 p_zError
380 = (zError__ft) DSO_bind_func(zlib_dso,
381 "zError");
382 198
383 if (p_compress && p_inflateEnd && p_inflate 199 if (p_compress && p_inflateEnd && p_inflate
384 && p_inflateInit_ && p_deflateEnd 200 && p_inflateInit_)
385 && p_deflate && p_deflateInit_ && p_zError)
386 zlib_loaded++; 201 zlib_loaded++;
387 } 202 }
388 } 203 }
@@ -392,410 +207,9 @@ COMP_METHOD *COMP_zlib(void)
392 if (zlib_loaded) 207 if (zlib_loaded)
393#endif 208#endif
394#if defined(ZLIB) || defined(ZLIB_SHARED) 209#if defined(ZLIB) || defined(ZLIB_SHARED)
395 { 210 meth = &zlib_method;
396 /* init zlib_stateful_ex_idx here so that in a multi-process
397 * application it's enough to intialize openssl before forking
398 * (idx will be inherited in all the children) */
399 if (zlib_stateful_ex_idx == -1)
400 {
401 CRYPTO_w_lock(CRYPTO_LOCK_COMP);
402 if (zlib_stateful_ex_idx == -1)
403 zlib_stateful_ex_idx =
404 CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_COMP,
405 0,NULL,NULL,NULL,zlib_stateful_free_ex_data);
406 CRYPTO_w_unlock(CRYPTO_LOCK_COMP);
407 if (zlib_stateful_ex_idx == -1)
408 goto err;
409 }
410
411 meth = &zlib_stateful_method;
412 }
413err:
414#endif 211#endif
415 212
416 return(meth); 213 return(meth);
417 } 214 }
418 215
419void COMP_zlib_cleanup(void)
420 {
421#ifdef ZLIB_SHARED
422 if (zlib_dso)
423 DSO_free(zlib_dso);
424#endif
425 }
426
427#ifdef ZLIB
428
429/* Zlib based compression/decompression filter BIO */
430
431typedef struct
432 {
433 unsigned char *ibuf; /* Input buffer */
434 int ibufsize; /* Buffer size */
435 z_stream zin; /* Input decompress context */
436 unsigned char *obuf; /* Output buffer */
437 int obufsize; /* Output buffer size */
438 unsigned char *optr; /* Position in output buffer */
439 int ocount; /* Amount of data in output buffer */
440 int odone; /* deflate EOF */
441 int comp_level; /* Compression level to use */
442 z_stream zout; /* Output compression context */
443 } BIO_ZLIB_CTX;
444
445#define ZLIB_DEFAULT_BUFSIZE 1024
446
447static int bio_zlib_new(BIO *bi);
448static int bio_zlib_free(BIO *bi);
449static int bio_zlib_read(BIO *b, char *out, int outl);
450static int bio_zlib_write(BIO *b, const char *in, int inl);
451static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr);
452static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp);
453
454static BIO_METHOD bio_meth_zlib =
455 {
456 BIO_TYPE_COMP,
457 "zlib",
458 bio_zlib_write,
459 bio_zlib_read,
460 NULL,
461 NULL,
462 bio_zlib_ctrl,
463 bio_zlib_new,
464 bio_zlib_free,
465 bio_zlib_callback_ctrl
466 };
467
468BIO_METHOD *BIO_f_zlib(void)
469 {
470 return &bio_meth_zlib;
471 }
472
473
474static int bio_zlib_new(BIO *bi)
475 {
476 BIO_ZLIB_CTX *ctx;
477#ifdef ZLIB_SHARED
478 (void)COMP_zlib();
479 if (!zlib_loaded)
480 {
481 COMPerr(COMP_F_BIO_ZLIB_NEW, COMP_R_ZLIB_NOT_SUPPORTED);
482 return 0;
483 }
484#endif
485 ctx = OPENSSL_malloc(sizeof(BIO_ZLIB_CTX));
486 if(!ctx)
487 {
488 COMPerr(COMP_F_BIO_ZLIB_NEW, ERR_R_MALLOC_FAILURE);
489 return 0;
490 }
491 ctx->ibuf = NULL;
492 ctx->obuf = NULL;
493 ctx->ibufsize = ZLIB_DEFAULT_BUFSIZE;
494 ctx->obufsize = ZLIB_DEFAULT_BUFSIZE;
495 ctx->zin.zalloc = Z_NULL;
496 ctx->zin.zfree = Z_NULL;
497 ctx->zin.next_in = NULL;
498 ctx->zin.avail_in = 0;
499 ctx->zin.next_out = NULL;
500 ctx->zin.avail_out = 0;
501 ctx->zout.zalloc = Z_NULL;
502 ctx->zout.zfree = Z_NULL;
503 ctx->zout.next_in = NULL;
504 ctx->zout.avail_in = 0;
505 ctx->zout.next_out = NULL;
506 ctx->zout.avail_out = 0;
507 ctx->odone = 0;
508 ctx->comp_level = Z_DEFAULT_COMPRESSION;
509 bi->init = 1;
510 bi->ptr = (char *)ctx;
511 bi->flags = 0;
512 return 1;
513 }
514
515static int bio_zlib_free(BIO *bi)
516 {
517 BIO_ZLIB_CTX *ctx;
518 if(!bi) return 0;
519 ctx = (BIO_ZLIB_CTX *)bi->ptr;
520 if(ctx->ibuf)
521 {
522 /* Destroy decompress context */
523 inflateEnd(&ctx->zin);
524 OPENSSL_free(ctx->ibuf);
525 }
526 if(ctx->obuf)
527 {
528 /* Destroy compress context */
529 deflateEnd(&ctx->zout);
530 OPENSSL_free(ctx->obuf);
531 }
532 OPENSSL_free(ctx);
533 bi->ptr = NULL;
534 bi->init = 0;
535 bi->flags = 0;
536 return 1;
537 }
538
539static int bio_zlib_read(BIO *b, char *out, int outl)
540 {
541 BIO_ZLIB_CTX *ctx;
542 int ret;
543 z_stream *zin;
544 if(!out || !outl) return 0;
545 ctx = (BIO_ZLIB_CTX *)b->ptr;
546 zin = &ctx->zin;
547 BIO_clear_retry_flags(b);
548 if(!ctx->ibuf)
549 {
550 ctx->ibuf = OPENSSL_malloc(ctx->ibufsize);
551 if(!ctx->ibuf)
552 {
553 COMPerr(COMP_F_BIO_ZLIB_READ, ERR_R_MALLOC_FAILURE);
554 return 0;
555 }
556 inflateInit(zin);
557 zin->next_in = ctx->ibuf;
558 zin->avail_in = 0;
559 }
560
561 /* Copy output data directly to supplied buffer */
562 zin->next_out = (unsigned char *)out;
563 zin->avail_out = (unsigned int)outl;
564 for(;;)
565 {
566 /* Decompress while data available */
567 while(zin->avail_in)
568 {
569 ret = inflate(zin, 0);
570 if((ret != Z_OK) && (ret != Z_STREAM_END))
571 {
572 COMPerr(COMP_F_BIO_ZLIB_READ,
573 COMP_R_ZLIB_INFLATE_ERROR);
574 ERR_add_error_data(2, "zlib error:",
575 zError(ret));
576 return 0;
577 }
578 /* If EOF or we've read everything then return */
579 if((ret == Z_STREAM_END) || !zin->avail_out)
580 return outl - zin->avail_out;
581 }
582
583 /* No data in input buffer try to read some in,
584 * if an error then return the total data read.
585 */
586 ret = BIO_read(b->next_bio, ctx->ibuf, ctx->ibufsize);
587 if(ret <= 0)
588 {
589 /* Total data read */
590 int tot = outl - zin->avail_out;
591 BIO_copy_next_retry(b);
592 if(ret < 0) return (tot > 0) ? tot : ret;
593 return tot;
594 }
595 zin->avail_in = ret;
596 zin->next_in = ctx->ibuf;
597 }
598 }
599
600static int bio_zlib_write(BIO *b, const char *in, int inl)
601 {
602 BIO_ZLIB_CTX *ctx;
603 int ret;
604 z_stream *zout;
605 if(!in || !inl) return 0;
606 ctx = (BIO_ZLIB_CTX *)b->ptr;
607 if(ctx->odone) return 0;
608 zout = &ctx->zout;
609 BIO_clear_retry_flags(b);
610 if(!ctx->obuf)
611 {
612 ctx->obuf = OPENSSL_malloc(ctx->obufsize);
613 /* Need error here */
614 if(!ctx->obuf)
615 {
616 COMPerr(COMP_F_BIO_ZLIB_WRITE, ERR_R_MALLOC_FAILURE);
617 return 0;
618 }
619 ctx->optr = ctx->obuf;
620 ctx->ocount = 0;
621 deflateInit(zout, ctx->comp_level);
622 zout->next_out = ctx->obuf;
623 zout->avail_out = ctx->obufsize;
624 }
625 /* Obtain input data directly from supplied buffer */
626 zout->next_in = (void *)in;
627 zout->avail_in = inl;
628 for(;;)
629 {
630 /* If data in output buffer write it first */
631 while(ctx->ocount) {
632 ret = BIO_write(b->next_bio, ctx->optr, ctx->ocount);
633 if(ret <= 0)
634 {
635 /* Total data written */
636 int tot = inl - zout->avail_in;
637 BIO_copy_next_retry(b);
638 if(ret < 0) return (tot > 0) ? tot : ret;
639 return tot;
640 }
641 ctx->optr += ret;
642 ctx->ocount -= ret;
643 }
644
645 /* Have we consumed all supplied data? */
646 if(!zout->avail_in)
647 return inl;
648
649 /* Compress some more */
650
651 /* Reset buffer */
652 ctx->optr = ctx->obuf;
653 zout->next_out = ctx->obuf;
654 zout->avail_out = ctx->obufsize;
655 /* Compress some more */
656 ret = deflate(zout, 0);
657 if(ret != Z_OK)
658 {
659 COMPerr(COMP_F_BIO_ZLIB_WRITE,
660 COMP_R_ZLIB_DEFLATE_ERROR);
661 ERR_add_error_data(2, "zlib error:", zError(ret));
662 return 0;
663 }
664 ctx->ocount = ctx->obufsize - zout->avail_out;
665 }
666 }
667
668static int bio_zlib_flush(BIO *b)
669 {
670 BIO_ZLIB_CTX *ctx;
671 int ret;
672 z_stream *zout;
673 ctx = (BIO_ZLIB_CTX *)b->ptr;
674 /* If no data written or already flush show success */
675 if(!ctx->obuf || (ctx->odone && !ctx->ocount)) return 1;
676 zout = &ctx->zout;
677 BIO_clear_retry_flags(b);
678 /* No more input data */
679 zout->next_in = NULL;
680 zout->avail_in = 0;
681 for(;;)
682 {
683 /* If data in output buffer write it first */
684 while(ctx->ocount)
685 {
686 ret = BIO_write(b->next_bio, ctx->optr, ctx->ocount);
687 if(ret <= 0)
688 {
689 BIO_copy_next_retry(b);
690 return ret;
691 }
692 ctx->optr += ret;
693 ctx->ocount -= ret;
694 }
695 if(ctx->odone) return 1;
696
697 /* Compress some more */
698
699 /* Reset buffer */
700 ctx->optr = ctx->obuf;
701 zout->next_out = ctx->obuf;
702 zout->avail_out = ctx->obufsize;
703 /* Compress some more */
704 ret = deflate(zout, Z_FINISH);
705 if(ret == Z_STREAM_END) ctx->odone = 1;
706 else if(ret != Z_OK)
707 {
708 COMPerr(COMP_F_BIO_ZLIB_FLUSH,
709 COMP_R_ZLIB_DEFLATE_ERROR);
710 ERR_add_error_data(2, "zlib error:", zError(ret));
711 return 0;
712 }
713 ctx->ocount = ctx->obufsize - zout->avail_out;
714 }
715 }
716
717static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr)
718 {
719 BIO_ZLIB_CTX *ctx;
720 int ret, *ip;
721 int ibs, obs;
722 if(!b->next_bio) return 0;
723 ctx = (BIO_ZLIB_CTX *)b->ptr;
724 switch (cmd)
725 {
726
727 case BIO_CTRL_RESET:
728 ctx->ocount = 0;
729 ctx->odone = 0;
730 break;
731
732 case BIO_CTRL_FLUSH:
733 ret = bio_zlib_flush(b);
734 if (ret > 0)
735 ret = BIO_flush(b->next_bio);
736 break;
737
738 case BIO_C_SET_BUFF_SIZE:
739 ibs = -1;
740 obs = -1;
741 if (ptr != NULL)
742 {
743 ip = ptr;
744 if (*ip == 0)
745 ibs = (int) num;
746 else
747 obs = (int) num;
748 }
749 else
750 {
751 ibs = (int)num;
752 obs = ibs;
753 }
754
755 if (ibs != -1)
756 {
757 if (ctx->ibuf)
758 {
759 OPENSSL_free(ctx->ibuf);
760 ctx->ibuf = NULL;
761 }
762 ctx->ibufsize = ibs;
763 }
764
765 if (obs != -1)
766 {
767 if (ctx->obuf)
768 {
769 OPENSSL_free(ctx->obuf);
770 ctx->obuf = NULL;
771 }
772 ctx->obufsize = obs;
773 }
774
775 break;
776
777 case BIO_C_DO_STATE_MACHINE:
778 BIO_clear_retry_flags(b);
779 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
780 BIO_copy_next_retry(b);
781 break;
782
783 default:
784 ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
785 break;
786
787 }
788
789 return ret;
790 }
791
792
793static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
794 {
795 if(!b->next_bio)
796 return 0;
797 return
798 BIO_callback_ctrl(b->next_bio, cmd, fp);
799 }
800
801#endif
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-04-26 21:23:41 +0000