mirror of
https://github.com/openssl/openssl.git
synced 2024-12-03 05:41:46 +08:00
706457b7bd
Apart from public and internal header files, there is a third type called local header files, which are located next to source files in the source directory. Currently, they have different suffixes like '*_lcl.h', '*_local.h', or '*_int.h' This commit changes the different suffixes to '*_local.h' uniformly. Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/9333)
641 lines
17 KiB
C
641 lines
17 KiB
C
/*
|
|
* Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the Apache License 2.0 (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <openssl/objects.h>
|
|
#include "internal/comp.h"
|
|
#include <openssl/err.h>
|
|
#include "crypto/cryptlib.h"
|
|
#include "internal/bio.h"
|
|
#include "comp_local.h"
|
|
|
|
COMP_METHOD *COMP_zlib(void);
|
|
|
|
static COMP_METHOD zlib_method_nozlib = {
|
|
NID_undef,
|
|
"(undef)",
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
};
|
|
|
|
#ifndef ZLIB
|
|
# undef ZLIB_SHARED
|
|
#else
|
|
|
|
# include <zlib.h>
|
|
|
|
static int zlib_stateful_init(COMP_CTX *ctx);
|
|
static void zlib_stateful_finish(COMP_CTX *ctx);
|
|
static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out,
|
|
unsigned int olen, unsigned char *in,
|
|
unsigned int ilen);
|
|
static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out,
|
|
unsigned int olen, unsigned char *in,
|
|
unsigned int ilen);
|
|
|
|
/* memory allocations functions for zlib initialisation */
|
|
static void *zlib_zalloc(void *opaque, unsigned int no, unsigned int size)
|
|
{
|
|
void *p;
|
|
|
|
p = OPENSSL_zalloc(no * size);
|
|
return p;
|
|
}
|
|
|
|
static void zlib_zfree(void *opaque, void *address)
|
|
{
|
|
OPENSSL_free(address);
|
|
}
|
|
|
|
|
|
static COMP_METHOD zlib_stateful_method = {
|
|
NID_zlib_compression,
|
|
LN_zlib_compression,
|
|
zlib_stateful_init,
|
|
zlib_stateful_finish,
|
|
zlib_stateful_compress_block,
|
|
zlib_stateful_expand_block
|
|
};
|
|
|
|
/*
|
|
* When OpenSSL is built on Windows, we do not want to require that
|
|
* the ZLIB.DLL be available in order for the OpenSSL DLLs to
|
|
* work. Therefore, all ZLIB routines are loaded at run time
|
|
* and we do not link to a .LIB file when ZLIB_SHARED is set.
|
|
*/
|
|
# if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
|
|
# include <windows.h>
|
|
# endif /* !(OPENSSL_SYS_WINDOWS ||
|
|
* OPENSSL_SYS_WIN32) */
|
|
|
|
# ifdef ZLIB_SHARED
|
|
# include "internal/dso.h"
|
|
|
|
/* Function pointers */
|
|
typedef int (*compress_ft) (Bytef *dest, uLongf * destLen,
|
|
const Bytef *source, uLong sourceLen);
|
|
typedef int (*inflateEnd_ft) (z_streamp strm);
|
|
typedef int (*inflate_ft) (z_streamp strm, int flush);
|
|
typedef int (*inflateInit__ft) (z_streamp strm,
|
|
const char *version, int stream_size);
|
|
typedef int (*deflateEnd_ft) (z_streamp strm);
|
|
typedef int (*deflate_ft) (z_streamp strm, int flush);
|
|
typedef int (*deflateInit__ft) (z_streamp strm, int level,
|
|
const char *version, int stream_size);
|
|
typedef const char *(*zError__ft) (int err);
|
|
static compress_ft p_compress = NULL;
|
|
static inflateEnd_ft p_inflateEnd = NULL;
|
|
static inflate_ft p_inflate = NULL;
|
|
static inflateInit__ft p_inflateInit_ = NULL;
|
|
static deflateEnd_ft p_deflateEnd = NULL;
|
|
static deflate_ft p_deflate = NULL;
|
|
static deflateInit__ft p_deflateInit_ = NULL;
|
|
static zError__ft p_zError = NULL;
|
|
|
|
static int zlib_loaded = 0; /* only attempt to init func pts once */
|
|
static DSO *zlib_dso = NULL;
|
|
|
|
# define compress p_compress
|
|
# define inflateEnd p_inflateEnd
|
|
# define inflate p_inflate
|
|
# define inflateInit_ p_inflateInit_
|
|
# define deflateEnd p_deflateEnd
|
|
# define deflate p_deflate
|
|
# define deflateInit_ p_deflateInit_
|
|
# define zError p_zError
|
|
# endif /* ZLIB_SHARED */
|
|
|
|
struct zlib_state {
|
|
z_stream istream;
|
|
z_stream ostream;
|
|
};
|
|
|
|
static int zlib_stateful_init(COMP_CTX *ctx)
|
|
{
|
|
int err;
|
|
struct zlib_state *state = OPENSSL_zalloc(sizeof(*state));
|
|
|
|
if (state == NULL)
|
|
goto err;
|
|
|
|
state->istream.zalloc = zlib_zalloc;
|
|
state->istream.zfree = zlib_zfree;
|
|
state->istream.opaque = Z_NULL;
|
|
state->istream.next_in = Z_NULL;
|
|
state->istream.next_out = Z_NULL;
|
|
err = inflateInit_(&state->istream, ZLIB_VERSION, sizeof(z_stream));
|
|
if (err != Z_OK)
|
|
goto err;
|
|
|
|
state->ostream.zalloc = zlib_zalloc;
|
|
state->ostream.zfree = zlib_zfree;
|
|
state->ostream.opaque = Z_NULL;
|
|
state->ostream.next_in = Z_NULL;
|
|
state->ostream.next_out = Z_NULL;
|
|
err = deflateInit_(&state->ostream, Z_DEFAULT_COMPRESSION,
|
|
ZLIB_VERSION, sizeof(z_stream));
|
|
if (err != Z_OK)
|
|
goto err;
|
|
|
|
ctx->data = state;
|
|
return 1;
|
|
err:
|
|
OPENSSL_free(state);
|
|
return 0;
|
|
}
|
|
|
|
static void zlib_stateful_finish(COMP_CTX *ctx)
|
|
{
|
|
struct zlib_state *state = ctx->data;
|
|
inflateEnd(&state->istream);
|
|
deflateEnd(&state->ostream);
|
|
OPENSSL_free(state);
|
|
}
|
|
|
|
static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out,
|
|
unsigned int olen, unsigned char *in,
|
|
unsigned int ilen)
|
|
{
|
|
int err = Z_OK;
|
|
struct zlib_state *state = ctx->data;
|
|
|
|
if (state == NULL)
|
|
return -1;
|
|
|
|
state->ostream.next_in = in;
|
|
state->ostream.avail_in = ilen;
|
|
state->ostream.next_out = out;
|
|
state->ostream.avail_out = olen;
|
|
if (ilen > 0)
|
|
err = deflate(&state->ostream, Z_SYNC_FLUSH);
|
|
if (err != Z_OK)
|
|
return -1;
|
|
return olen - state->ostream.avail_out;
|
|
}
|
|
|
|
static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out,
|
|
unsigned int olen, unsigned char *in,
|
|
unsigned int ilen)
|
|
{
|
|
int err = Z_OK;
|
|
struct zlib_state *state = ctx->data;
|
|
|
|
if (state == NULL)
|
|
return 0;
|
|
|
|
state->istream.next_in = in;
|
|
state->istream.avail_in = ilen;
|
|
state->istream.next_out = out;
|
|
state->istream.avail_out = olen;
|
|
if (ilen > 0)
|
|
err = inflate(&state->istream, Z_SYNC_FLUSH);
|
|
if (err != Z_OK)
|
|
return -1;
|
|
return olen - state->istream.avail_out;
|
|
}
|
|
|
|
#endif
|
|
|
|
COMP_METHOD *COMP_zlib(void)
|
|
{
|
|
COMP_METHOD *meth = &zlib_method_nozlib;
|
|
|
|
#ifdef ZLIB_SHARED
|
|
/* LIBZ may be externally defined, and we should respect that value */
|
|
# ifndef LIBZ
|
|
# if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
|
|
# define LIBZ "ZLIB1"
|
|
# elif defined(OPENSSL_SYS_VMS)
|
|
# define LIBZ "LIBZ"
|
|
# else
|
|
# define LIBZ "z"
|
|
# endif
|
|
# endif
|
|
|
|
if (!zlib_loaded) {
|
|
zlib_dso = DSO_load(NULL, LIBZ, NULL, 0);
|
|
if (zlib_dso != NULL) {
|
|
p_compress = (compress_ft) DSO_bind_func(zlib_dso, "compress");
|
|
p_inflateEnd
|
|
= (inflateEnd_ft) DSO_bind_func(zlib_dso, "inflateEnd");
|
|
p_inflate = (inflate_ft) DSO_bind_func(zlib_dso, "inflate");
|
|
p_inflateInit_
|
|
= (inflateInit__ft) DSO_bind_func(zlib_dso, "inflateInit_");
|
|
p_deflateEnd
|
|
= (deflateEnd_ft) DSO_bind_func(zlib_dso, "deflateEnd");
|
|
p_deflate = (deflate_ft) DSO_bind_func(zlib_dso, "deflate");
|
|
p_deflateInit_
|
|
= (deflateInit__ft) DSO_bind_func(zlib_dso, "deflateInit_");
|
|
p_zError = (zError__ft) DSO_bind_func(zlib_dso, "zError");
|
|
|
|
if (p_compress && p_inflateEnd && p_inflate
|
|
&& p_inflateInit_ && p_deflateEnd
|
|
&& p_deflate && p_deflateInit_ && p_zError)
|
|
zlib_loaded++;
|
|
|
|
if (!OPENSSL_init_crypto(OPENSSL_INIT_ZLIB, NULL)) {
|
|
comp_zlib_cleanup_int();
|
|
return meth;
|
|
}
|
|
if (zlib_loaded)
|
|
meth = &zlib_stateful_method;
|
|
}
|
|
}
|
|
#endif
|
|
#if defined(ZLIB)
|
|
meth = &zlib_stateful_method;
|
|
#endif
|
|
|
|
return meth;
|
|
}
|
|
|
|
void comp_zlib_cleanup_int(void)
|
|
{
|
|
#ifdef ZLIB_SHARED
|
|
DSO_free(zlib_dso);
|
|
zlib_dso = NULL;
|
|
#endif
|
|
}
|
|
|
|
#ifdef ZLIB
|
|
|
|
/* Zlib based compression/decompression filter BIO */
|
|
|
|
typedef struct {
|
|
unsigned char *ibuf; /* Input buffer */
|
|
int ibufsize; /* Buffer size */
|
|
z_stream zin; /* Input decompress context */
|
|
unsigned char *obuf; /* Output buffer */
|
|
int obufsize; /* Output buffer size */
|
|
unsigned char *optr; /* Position in output buffer */
|
|
int ocount; /* Amount of data in output buffer */
|
|
int odone; /* deflate EOF */
|
|
int comp_level; /* Compression level to use */
|
|
z_stream zout; /* Output compression context */
|
|
} BIO_ZLIB_CTX;
|
|
|
|
# define ZLIB_DEFAULT_BUFSIZE 1024
|
|
|
|
static int bio_zlib_new(BIO *bi);
|
|
static int bio_zlib_free(BIO *bi);
|
|
static int bio_zlib_read(BIO *b, char *out, int outl);
|
|
static int bio_zlib_write(BIO *b, const char *in, int inl);
|
|
static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr);
|
|
static long bio_zlib_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp);
|
|
|
|
static const BIO_METHOD bio_meth_zlib = {
|
|
BIO_TYPE_COMP,
|
|
"zlib",
|
|
/* TODO: Convert to new style write function */
|
|
bwrite_conv,
|
|
bio_zlib_write,
|
|
/* TODO: Convert to new style read function */
|
|
bread_conv,
|
|
bio_zlib_read,
|
|
NULL, /* bio_zlib_puts, */
|
|
NULL, /* bio_zlib_gets, */
|
|
bio_zlib_ctrl,
|
|
bio_zlib_new,
|
|
bio_zlib_free,
|
|
bio_zlib_callback_ctrl
|
|
};
|
|
|
|
const BIO_METHOD *BIO_f_zlib(void)
|
|
{
|
|
return &bio_meth_zlib;
|
|
}
|
|
|
|
static int bio_zlib_new(BIO *bi)
|
|
{
|
|
BIO_ZLIB_CTX *ctx;
|
|
# ifdef ZLIB_SHARED
|
|
(void)COMP_zlib();
|
|
if (!zlib_loaded) {
|
|
COMPerr(COMP_F_BIO_ZLIB_NEW, COMP_R_ZLIB_NOT_SUPPORTED);
|
|
return 0;
|
|
}
|
|
# endif
|
|
ctx = OPENSSL_zalloc(sizeof(*ctx));
|
|
if (ctx == NULL) {
|
|
COMPerr(COMP_F_BIO_ZLIB_NEW, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
ctx->ibufsize = ZLIB_DEFAULT_BUFSIZE;
|
|
ctx->obufsize = ZLIB_DEFAULT_BUFSIZE;
|
|
ctx->zin.zalloc = Z_NULL;
|
|
ctx->zin.zfree = Z_NULL;
|
|
ctx->zout.zalloc = Z_NULL;
|
|
ctx->zout.zfree = Z_NULL;
|
|
ctx->comp_level = Z_DEFAULT_COMPRESSION;
|
|
BIO_set_init(bi, 1);
|
|
BIO_set_data(bi, ctx);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int bio_zlib_free(BIO *bi)
|
|
{
|
|
BIO_ZLIB_CTX *ctx;
|
|
if (!bi)
|
|
return 0;
|
|
ctx = BIO_get_data(bi);
|
|
if (ctx->ibuf) {
|
|
/* Destroy decompress context */
|
|
inflateEnd(&ctx->zin);
|
|
OPENSSL_free(ctx->ibuf);
|
|
}
|
|
if (ctx->obuf) {
|
|
/* Destroy compress context */
|
|
deflateEnd(&ctx->zout);
|
|
OPENSSL_free(ctx->obuf);
|
|
}
|
|
OPENSSL_free(ctx);
|
|
BIO_set_data(bi, NULL);
|
|
BIO_set_init(bi, 0);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int bio_zlib_read(BIO *b, char *out, int outl)
|
|
{
|
|
BIO_ZLIB_CTX *ctx;
|
|
int ret;
|
|
z_stream *zin;
|
|
BIO *next = BIO_next(b);
|
|
|
|
if (!out || !outl)
|
|
return 0;
|
|
ctx = BIO_get_data(b);
|
|
zin = &ctx->zin;
|
|
BIO_clear_retry_flags(b);
|
|
if (!ctx->ibuf) {
|
|
ctx->ibuf = OPENSSL_malloc(ctx->ibufsize);
|
|
if (ctx->ibuf == NULL) {
|
|
COMPerr(COMP_F_BIO_ZLIB_READ, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
inflateInit(zin);
|
|
zin->next_in = ctx->ibuf;
|
|
zin->avail_in = 0;
|
|
}
|
|
|
|
/* Copy output data directly to supplied buffer */
|
|
zin->next_out = (unsigned char *)out;
|
|
zin->avail_out = (unsigned int)outl;
|
|
for (;;) {
|
|
/* Decompress while data available */
|
|
while (zin->avail_in) {
|
|
ret = inflate(zin, 0);
|
|
if ((ret != Z_OK) && (ret != Z_STREAM_END)) {
|
|
COMPerr(COMP_F_BIO_ZLIB_READ, COMP_R_ZLIB_INFLATE_ERROR);
|
|
ERR_add_error_data(2, "zlib error:", zError(ret));
|
|
return 0;
|
|
}
|
|
/* If EOF or we've read everything then return */
|
|
if ((ret == Z_STREAM_END) || !zin->avail_out)
|
|
return outl - zin->avail_out;
|
|
}
|
|
|
|
/*
|
|
* No data in input buffer try to read some in, if an error then
|
|
* return the total data read.
|
|
*/
|
|
ret = BIO_read(next, ctx->ibuf, ctx->ibufsize);
|
|
if (ret <= 0) {
|
|
/* Total data read */
|
|
int tot = outl - zin->avail_out;
|
|
BIO_copy_next_retry(b);
|
|
if (ret < 0)
|
|
return (tot > 0) ? tot : ret;
|
|
return tot;
|
|
}
|
|
zin->avail_in = ret;
|
|
zin->next_in = ctx->ibuf;
|
|
}
|
|
}
|
|
|
|
static int bio_zlib_write(BIO *b, const char *in, int inl)
|
|
{
|
|
BIO_ZLIB_CTX *ctx;
|
|
int ret;
|
|
z_stream *zout;
|
|
BIO *next = BIO_next(b);
|
|
|
|
if (!in || !inl)
|
|
return 0;
|
|
ctx = BIO_get_data(b);
|
|
if (ctx->odone)
|
|
return 0;
|
|
zout = &ctx->zout;
|
|
BIO_clear_retry_flags(b);
|
|
if (!ctx->obuf) {
|
|
ctx->obuf = OPENSSL_malloc(ctx->obufsize);
|
|
/* Need error here */
|
|
if (ctx->obuf == NULL) {
|
|
COMPerr(COMP_F_BIO_ZLIB_WRITE, ERR_R_MALLOC_FAILURE);
|
|
return 0;
|
|
}
|
|
ctx->optr = ctx->obuf;
|
|
ctx->ocount = 0;
|
|
deflateInit(zout, ctx->comp_level);
|
|
zout->next_out = ctx->obuf;
|
|
zout->avail_out = ctx->obufsize;
|
|
}
|
|
/* Obtain input data directly from supplied buffer */
|
|
zout->next_in = (void *)in;
|
|
zout->avail_in = inl;
|
|
for (;;) {
|
|
/* If data in output buffer write it first */
|
|
while (ctx->ocount) {
|
|
ret = BIO_write(next, ctx->optr, ctx->ocount);
|
|
if (ret <= 0) {
|
|
/* Total data written */
|
|
int tot = inl - zout->avail_in;
|
|
BIO_copy_next_retry(b);
|
|
if (ret < 0)
|
|
return (tot > 0) ? tot : ret;
|
|
return tot;
|
|
}
|
|
ctx->optr += ret;
|
|
ctx->ocount -= ret;
|
|
}
|
|
|
|
/* Have we consumed all supplied data? */
|
|
if (!zout->avail_in)
|
|
return inl;
|
|
|
|
/* Compress some more */
|
|
|
|
/* Reset buffer */
|
|
ctx->optr = ctx->obuf;
|
|
zout->next_out = ctx->obuf;
|
|
zout->avail_out = ctx->obufsize;
|
|
/* Compress some more */
|
|
ret = deflate(zout, 0);
|
|
if (ret != Z_OK) {
|
|
COMPerr(COMP_F_BIO_ZLIB_WRITE, COMP_R_ZLIB_DEFLATE_ERROR);
|
|
ERR_add_error_data(2, "zlib error:", zError(ret));
|
|
return 0;
|
|
}
|
|
ctx->ocount = ctx->obufsize - zout->avail_out;
|
|
}
|
|
}
|
|
|
|
static int bio_zlib_flush(BIO *b)
|
|
{
|
|
BIO_ZLIB_CTX *ctx;
|
|
int ret;
|
|
z_stream *zout;
|
|
BIO *next = BIO_next(b);
|
|
|
|
ctx = BIO_get_data(b);
|
|
/* If no data written or already flush show success */
|
|
if (!ctx->obuf || (ctx->odone && !ctx->ocount))
|
|
return 1;
|
|
zout = &ctx->zout;
|
|
BIO_clear_retry_flags(b);
|
|
/* No more input data */
|
|
zout->next_in = NULL;
|
|
zout->avail_in = 0;
|
|
for (;;) {
|
|
/* If data in output buffer write it first */
|
|
while (ctx->ocount) {
|
|
ret = BIO_write(next, ctx->optr, ctx->ocount);
|
|
if (ret <= 0) {
|
|
BIO_copy_next_retry(b);
|
|
return ret;
|
|
}
|
|
ctx->optr += ret;
|
|
ctx->ocount -= ret;
|
|
}
|
|
if (ctx->odone)
|
|
return 1;
|
|
|
|
/* Compress some more */
|
|
|
|
/* Reset buffer */
|
|
ctx->optr = ctx->obuf;
|
|
zout->next_out = ctx->obuf;
|
|
zout->avail_out = ctx->obufsize;
|
|
/* Compress some more */
|
|
ret = deflate(zout, Z_FINISH);
|
|
if (ret == Z_STREAM_END)
|
|
ctx->odone = 1;
|
|
else if (ret != Z_OK) {
|
|
COMPerr(COMP_F_BIO_ZLIB_FLUSH, COMP_R_ZLIB_DEFLATE_ERROR);
|
|
ERR_add_error_data(2, "zlib error:", zError(ret));
|
|
return 0;
|
|
}
|
|
ctx->ocount = ctx->obufsize - zout->avail_out;
|
|
}
|
|
}
|
|
|
|
static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr)
|
|
{
|
|
BIO_ZLIB_CTX *ctx;
|
|
int ret, *ip;
|
|
int ibs, obs;
|
|
BIO *next = BIO_next(b);
|
|
|
|
if (next == NULL)
|
|
return 0;
|
|
ctx = BIO_get_data(b);
|
|
switch (cmd) {
|
|
|
|
case BIO_CTRL_RESET:
|
|
ctx->ocount = 0;
|
|
ctx->odone = 0;
|
|
ret = 1;
|
|
break;
|
|
|
|
case BIO_CTRL_FLUSH:
|
|
ret = bio_zlib_flush(b);
|
|
if (ret > 0)
|
|
ret = BIO_flush(next);
|
|
break;
|
|
|
|
case BIO_C_SET_BUFF_SIZE:
|
|
ibs = -1;
|
|
obs = -1;
|
|
if (ptr != NULL) {
|
|
ip = ptr;
|
|
if (*ip == 0)
|
|
ibs = (int)num;
|
|
else
|
|
obs = (int)num;
|
|
} else {
|
|
ibs = (int)num;
|
|
obs = ibs;
|
|
}
|
|
|
|
if (ibs != -1) {
|
|
OPENSSL_free(ctx->ibuf);
|
|
ctx->ibuf = NULL;
|
|
ctx->ibufsize = ibs;
|
|
}
|
|
|
|
if (obs != -1) {
|
|
OPENSSL_free(ctx->obuf);
|
|
ctx->obuf = NULL;
|
|
ctx->obufsize = obs;
|
|
}
|
|
ret = 1;
|
|
break;
|
|
|
|
case BIO_C_DO_STATE_MACHINE:
|
|
BIO_clear_retry_flags(b);
|
|
ret = BIO_ctrl(next, cmd, num, ptr);
|
|
BIO_copy_next_retry(b);
|
|
break;
|
|
|
|
case BIO_CTRL_WPENDING:
|
|
if (ctx->obuf == NULL)
|
|
return 0;
|
|
|
|
if (ctx->odone) {
|
|
ret = ctx->ocount;
|
|
} else {
|
|
ret = ctx->ocount;
|
|
if (ret == 0)
|
|
/* Unknown amount pending but we are not finished */
|
|
ret = 1;
|
|
}
|
|
if (ret == 0)
|
|
ret = BIO_ctrl(next, cmd, num, ptr);
|
|
break;
|
|
|
|
case BIO_CTRL_PENDING:
|
|
ret = ctx->zin.avail_in;
|
|
if (ret == 0)
|
|
ret = BIO_ctrl(next, cmd, num, ptr);
|
|
break;
|
|
|
|
default:
|
|
ret = BIO_ctrl(next, cmd, num, ptr);
|
|
break;
|
|
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static long bio_zlib_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
|
|
{
|
|
BIO *next = BIO_next(b);
|
|
if (next == NULL)
|
|
return 0;
|
|
return BIO_callback_ctrl(next, cmd, fp);
|
|
}
|
|
|
|
#endif
|