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|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/objects.h>
#include <openssl/comp.h>
#include <openssl/err.h>
COMP_METHOD *COMP_zlib(void );
static COMP_METHOD zlib_method_nozlib={
NID_undef,
"(undef)",
NULL,
NULL,
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);
#if 0
static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out,
unsigned int olen, unsigned char *in, unsigned int ilen);
static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out,
unsigned int olen, unsigned char *in, unsigned int ilen);
static int zz_uncompress(Bytef *dest, uLongf *destLen, const Bytef *source,
uLong sourceLen);
static COMP_METHOD zlib_stateless_method={
NID_zlib_compression,
LN_zlib_compression,
NULL,
NULL,
zlib_compress_block,
zlib_expand_block,
NULL,
NULL,
};
#endif
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,
NULL,
NULL,
};
/*
* 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.
*/
#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
# include <windows.h>
# define Z_CALLCONV _stdcall
# ifndef ZLIB_SHARED
# define ZLIB_SHARED
# endif
#else
# define Z_CALLCONV
#endif /* !(OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32) */
#ifdef ZLIB_SHARED
#include <openssl/dso.h>
/* Prototypes for built in stubs */
#if 0
static int stub_compress(Bytef *dest,uLongf *destLen,
const Bytef *source, uLong sourceLen);
#endif
static int stub_inflateEnd(z_streamp strm);
static int stub_inflate(z_streamp strm, int flush);
static int stub_inflateInit_(z_streamp strm, const char * version,
int stream_size);
static int stub_deflateEnd(z_streamp strm);
static int stub_deflate(z_streamp strm, int flush);
static int stub_deflateInit_(z_streamp strm, int level,
const char * version, int stream_size);
/* Function pointers */
typedef int (Z_CALLCONV *compress_ft)(Bytef *dest,uLongf *destLen,
const Bytef *source, uLong sourceLen);
typedef int (Z_CALLCONV *inflateEnd_ft)(z_streamp strm);
typedef int (Z_CALLCONV *inflate_ft)(z_streamp strm, int flush);
typedef int (Z_CALLCONV *inflateInit__ft)(z_streamp strm,
const char * version, int stream_size);
typedef int (Z_CALLCONV *deflateEnd_ft)(z_streamp strm);
typedef int (Z_CALLCONV *deflate_ft)(z_streamp strm, int flush);
typedef int (Z_CALLCONV *deflateInit__ft)(z_streamp strm, int level,
const char * version, int stream_size);
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 int zlib_loaded = 0; /* only attempt to init func pts once */
static DSO *zlib_dso = NULL;
#define compress stub_compress
#define inflateEnd stub_inflateEnd
#define inflate stub_inflate
#define inflateInit_ stub_inflateInit_
#define deflateEnd stub_deflateEnd
#define deflate stub_deflate
#define deflateInit_ stub_deflateInit_
#endif /* ZLIB_SHARED */
struct zlib_state
{
z_stream istream;
z_stream ostream;
};
static int zlib_stateful_ex_idx = -1;
static void zlib_stateful_free_ex_data(void *obj, void *item,
CRYPTO_EX_DATA *ad, int ind,long argl, void *argp)
{
struct zlib_state *state = (struct zlib_state *)item;
inflateEnd(&state->istream);
deflateEnd(&state->ostream);
OPENSSL_free(state);
}
static int zlib_stateful_init(COMP_CTX *ctx)
{
int err;
struct zlib_state *state =
(struct zlib_state *)OPENSSL_malloc(sizeof(struct zlib_state));
if (state == NULL)
goto err;
state->istream.zalloc = Z_NULL;
state->istream.zfree = Z_NULL;
state->istream.opaque = Z_NULL;
state->istream.next_in = Z_NULL;
state->istream.next_out = Z_NULL;
state->istream.avail_in = 0;
state->istream.avail_out = 0;
err = inflateInit_(&state->istream,
ZLIB_VERSION, sizeof(z_stream));
if (err != Z_OK)
goto err;
state->ostream.zalloc = Z_NULL;
state->ostream.zfree = Z_NULL;
state->ostream.opaque = Z_NULL;
state->ostream.next_in = Z_NULL;
state->ostream.next_out = Z_NULL;
state->ostream.avail_in = 0;
state->ostream.avail_out = 0;
err = deflateInit_(&state->ostream,Z_DEFAULT_COMPRESSION,
ZLIB_VERSION, sizeof(z_stream));
if (err != Z_OK)
goto err;
CRYPTO_new_ex_data(CRYPTO_EX_INDEX_COMP,ctx,&ctx->ex_data);
if (zlib_stateful_ex_idx == -1)
{
CRYPTO_w_lock(CRYPTO_LOCK_COMP);
if (zlib_stateful_ex_idx == -1)
zlib_stateful_ex_idx =
CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_COMP,
0,NULL,NULL,NULL,zlib_stateful_free_ex_data);
CRYPTO_w_unlock(CRYPTO_LOCK_COMP);
if (zlib_stateful_ex_idx == -1)
goto err;
}
CRYPTO_set_ex_data(&ctx->ex_data,zlib_stateful_ex_idx,state);
return 1;
err:
if (state) OPENSSL_free(state);
return 0;
}
static void zlib_stateful_finish(COMP_CTX *ctx)
{
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_COMP,ctx,&ctx->ex_data);
}
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 =
(struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data,
zlib_stateful_ex_idx);
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;
#ifdef DEBUG_ZLIB
fprintf(stderr,"compress(%4d)->%4d %s\n",
ilen,olen - state->ostream.avail_out,
(ilen != olen - state->ostream.avail_out)?"zlib":"clear");
#endif
return olen - state->ostream.avail_out;
}
static int zlib_stateful_expand_block(COMP_CTX *ctx
|