Delete bundled copy of OpenSSL and replace with README.

openssl/crypto/comp/c_zlib.c

Index: openssl/crypto/comp/c_zlib.c
diff --git a/openssl/crypto/comp/c_zlib.c b/openssl/crypto/comp/c_zlib.c
deleted file mode 100644
index 8adf35f3fc9cfcdc52b7651358a51b8d81983f19..0000000000000000000000000000000000000000
--- a/openssl/crypto/comp/c_zlib.c
+++ /dev/null
@@ -1,799 +0,0 @@
-#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);
-
-
-/* memory allocations functions for zlib intialization */
-static void* zlib_zalloc(void* opaque, unsigned int no, unsigned int size)
-{
-	void *p;
-	
-	p=OPENSSL_malloc(no*size);
-	if (p)
-		memset(p, 0, no*size);
-	return p;
-}
-
-
-static void zlib_zfree(void* opaque, void* address)
-{
-	OPENSSL_free(address);
-}
-
-#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 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 <openssl/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_ex_idx = -1;
-
-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 = zlib_zalloc;
-	state->istream.zfree = zlib_zfree;
-	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 = zlib_zalloc;
-	state->ostream.zfree = zlib_zfree;
-	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);
-	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)
-	{
-	struct zlib_state *state =
-		(struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data,
-			zlib_stateful_ex_idx);
-	inflateEnd(&state->istream);
-	deflateEnd(&state->ostream);
-	OPENSSL_free(state);
-	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, 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 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;
-#ifdef DEBUG_ZLIB
-	fprintf(stderr,"expand(%4d)->%4d %s\n",
-		ilen,olen - state->istream.avail_out,
-		(ilen != olen - state->istream.avail_out)?"zlib":"clear");
-#endif
-	return olen - state->istream.avail_out;
-	}
-
-#if 0
-static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out,
-	unsigned int olen, unsigned char *in, unsigned int ilen)
-	{
-	unsigned long l;
-	int i;
-	int clear=1;
-
-	if (ilen > 128)
-		{
-		out[0]=1;
-		l=olen-1;
-		i=compress(&(out[1]),&l,in,(unsigned long)ilen);
-		if (i != Z_OK)
-			return(-1);
-		if (ilen > l)
-			{
-			clear=0;
-			l++;
-			}
-		}
-	if (clear)
-		{
-		out[0]=0;
-		memcpy(&(out[1]),in,ilen);
-		l=ilen+1;
-		}
-#ifdef DEBUG_ZLIB
-	fprintf(stderr,"compress(%4d)->%4d %s\n",
-		ilen,(int)l,(clear)?"clear":"zlib");
-#endif
-	return((int)l);
-	}
-
-static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out,
-	unsigned int olen, unsigned char *in, unsigned int ilen)
-	{
-	unsigned long l;
-	int i;
-
-	if (in[0])
-		{
-		l=olen;
-		i=zz_uncompress(out,&l,&(in[1]),(unsigned long)ilen-1);
-		if (i != Z_OK)
-			return(-1);
-		}
-	else
-		{
-		memcpy(out,&(in[1]),ilen-1);
-		l=ilen-1;
-		}
-#ifdef DEBUG_ZLIB
-        fprintf(stderr,"expand  (%4d)->%4d %s\n",
-		ilen,(int)l,in[0]?"zlib":"clear");
-#endif
-	return((int)l);
-	}
-
-static int zz_uncompress (Bytef *dest, uLongf *destLen, const Bytef *source,
-	     uLong sourceLen)
-{
-    z_stream stream;
-    int err;
-
-    stream.next_in = (Bytef*)source;
-    stream.avail_in = (uInt)sourceLen;
-    /* Check for source > 64K on 16-bit machine: */
-    if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
-
-    stream.next_out = dest;
-    stream.avail_out = (uInt)*destLen;
-    if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
-
-    stream.zalloc = (alloc_func)0;
-    stream.zfree = (free_func)0;
-
-    err = inflateInit_(&stream,
-	    ZLIB_VERSION, sizeof(z_stream));
-    if (err != Z_OK) return err;
-
-    err = inflate(&stream, Z_FINISH);
-    if (err != Z_STREAM_END) {
-        inflateEnd(&stream);
-        return err;
-    }
-    *destLen = stream.total_out;
-
-    err = inflateEnd(&stream);
-    return err;
-}
-#endif
-
-#endif
-
-COMP_METHOD *COMP_zlib(void)
-	{
-	COMP_METHOD *meth = &zlib_method_nozlib;
-
-#ifdef ZLIB_SHARED
-	if (!zlib_loaded)
-		{
-#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
-		zlib_dso = DSO_load(NULL, "ZLIB1", NULL, 0);
-#else
-		zlib_dso = DSO_load(NULL, "z", NULL, 0);
-#endif
-		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++;
-			}
-		}
-
-#endif
-#ifdef ZLIB_SHARED
-	if (zlib_loaded)
-#endif
-#if defined(ZLIB) || defined(ZLIB_SHARED)
-		{
-		/* init zlib_stateful_ex_idx here so that in a multi-process
-		 * application it's enough to intialize openssl before forking
-		 * (idx will be inherited in all the children) */
-		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,NULL);
-			CRYPTO_w_unlock(CRYPTO_LOCK_COMP);
-			if (zlib_stateful_ex_idx == -1)
-				goto err;
-			}
-		
-		meth = &zlib_stateful_method;
-		}
-err:	
-#endif
-
-	return(meth);
-	}
-
-void COMP_zlib_cleanup(void)
-	{
-#ifdef ZLIB_SHARED
-	if (zlib_dso)
-		DSO_free(zlib_dso);
-#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 BIO_METHOD bio_meth_zlib = 
-	{
-	BIO_TYPE_COMP,
-	"zlib",
-	bio_zlib_write,
-	bio_zlib_read,
-	NULL,
-	NULL,
-	bio_zlib_ctrl,
-	bio_zlib_new,
-	bio_zlib_free,
-	bio_zlib_callback_ctrl
-	};
-
-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_malloc(sizeof(BIO_ZLIB_CTX));
-	if(!ctx)
-		{
-		COMPerr(COMP_F_BIO_ZLIB_NEW, ERR_R_MALLOC_FAILURE);
-		return 0;
-		}
-	ctx->ibuf = NULL;
-	ctx->obuf = NULL;
-	ctx->ibufsize = ZLIB_DEFAULT_BUFSIZE;
-	ctx->obufsize = ZLIB_DEFAULT_BUFSIZE;
-	ctx->zin.zalloc = Z_NULL;
-	ctx->zin.zfree = Z_NULL;
-	ctx->zin.next_in = NULL;
-	ctx->zin.avail_in = 0;
-	ctx->zin.next_out = NULL;
-	ctx->zin.avail_out = 0;
-	ctx->zout.zalloc = Z_NULL;
-	ctx->zout.zfree = Z_NULL;
-	ctx->zout.next_in = NULL;
-	ctx->zout.avail_in = 0;
-	ctx->zout.next_out = NULL;
-	ctx->zout.avail_out = 0;
-	ctx->odone = 0;
-	ctx->comp_level = Z_DEFAULT_COMPRESSION;
-	bi->init = 1;
-	bi->ptr = (char *)ctx;
-	bi->flags = 0;
-	return 1;
-	}
-
-static int bio_zlib_free(BIO *bi)
-	{
-	BIO_ZLIB_CTX *ctx;
-	if(!bi) return 0;
-	ctx = (BIO_ZLIB_CTX *)bi->ptr;
-	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);
-	bi->ptr = NULL;
-	bi->init = 0;
-	bi->flags = 0;
-	return 1;
-	}
-
-static int bio_zlib_read(BIO *b, char *out, int outl)
-	{
-	BIO_ZLIB_CTX *ctx;
-	int ret;
-	z_stream *zin;
-	if(!out || !outl) return 0;
-	ctx = (BIO_ZLIB_CTX *)b->ptr;
-	zin = &ctx->zin;
-	BIO_clear_retry_flags(b);
-	if(!ctx->ibuf)
-		{
-		ctx->ibuf = OPENSSL_malloc(ctx->ibufsize);
-		if(!ctx->ibuf)
-			{
-			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(b->next_bio, 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;
-	if(!in || !inl) return 0;
-	ctx = (BIO_ZLIB_CTX *)b->ptr;
-	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)
-			{
-			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(b->next_bio, 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;
-	ctx = (BIO_ZLIB_CTX *)b->ptr;
-	/* 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(b->next_bio, 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;
-	if(!b->next_bio) return 0;
-	ctx = (BIO_ZLIB_CTX *)b->ptr;
-	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(b->next_bio);
-		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)
-			{
-			if (ctx->ibuf)
-				{
-				OPENSSL_free(ctx->ibuf);
-				ctx->ibuf = NULL;
-				}
-			ctx->ibufsize = ibs;
-			}
-
-		if (obs != -1)
-			{
-			if (ctx->obuf)
-				{
-				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(b->next_bio, cmd, num, ptr);
-		BIO_copy_next_retry(b);
-		break;
-
-	default:
-		ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
-		break;
-
-		}
-
-	return ret;
-	}
-
-
-static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
-	{
-	if(!b->next_bio)
-		return 0;
-	return
-		BIO_callback_ctrl(b->next_bio, cmd, fp);
-	}
-
-#endif