generic-library/openssl
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Backport of zlib compression BIO from HEAD. Update mkdef.pl script to handle

Browse Source 
ZLIB. Update ordinals.
This commit is contained in:
Dr. Stephen Henson
2008-04-02 11:37:25 +00:00
parent e88f66bb49
commit 7ec2d392e7
7 changed files with 438 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

391
crypto/comp/c_zlib.c
View File

@@ -105,6 +105,7 @@ 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;
@@ -112,6 +113,7 @@ 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;
@@ -123,6 +125,7 @@ static DSO *zlib_dso = NULL;
#define deflateEnd p_deflateEnd
#define deflate p_deflate
#define deflateInit_ p_deflateInit_
#define zError p_zError
#endif /* ZLIB_SHARED */
struct zlib_state
@@ -373,10 +376,13 @@ COMP_METHOD *COMP_zlib(void)
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_deflate && p_deflateInit_ && p_zError)
zlib_loaded++;
}
}
@@ -410,3 +416,386 @@ err:
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;
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;
}
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

14
crypto/comp/comp.h
View File

@@ -47,6 +47,13 @@ int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
unsigned char *in, int ilen);
COMP_METHOD *COMP_rle(void );
COMP_METHOD *COMP_zlib(void );
void COMP_zlib_cleanup(void);
#ifdef HEADER_BIO_H
#ifdef ZLIB
BIO_METHOD *BIO_f_zlib(void);
#endif
#endif
/* BEGIN ERROR CODES */
/* The following lines are auto generated by the script mkerr.pl. Any changes
@@ -57,8 +64,15 @@ void ERR_load_COMP_strings(void);
/* Error codes for the COMP functions. */
/* Function codes. */
#define COMP_F_BIO_ZLIB_FLUSH 99
#define COMP_F_BIO_ZLIB_NEW 100
#define COMP_F_BIO_ZLIB_READ 101
#define COMP_F_BIO_ZLIB_WRITE 102
/* Reason codes. */
#define COMP_R_ZLIB_DEFLATE_ERROR 99
#define COMP_R_ZLIB_INFLATE_ERROR 100
#define COMP_R_ZLIB_NOT_SUPPORTED 101
#ifdef __cplusplus
}

9
crypto/comp/comp_err.c
View File

@@ -1,6 +1,6 @@
/* crypto/comp/comp_err.c */
/* ====================================================================
* Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved.
* Copyright (c) 1999-2008 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -70,11 +70,18 @@
static ERR_STRING_DATA COMP_str_functs[]=
{
{ERR_FUNC(COMP_F_BIO_ZLIB_FLUSH), "BIO_ZLIB_FLUSH"},
{ERR_FUNC(COMP_F_BIO_ZLIB_NEW), "BIO_ZLIB_NEW"},
{ERR_FUNC(COMP_F_BIO_ZLIB_READ), "BIO_ZLIB_READ"},
{ERR_FUNC(COMP_F_BIO_ZLIB_WRITE), "BIO_ZLIB_WRITE"},
{0,NULL}
};
static ERR_STRING_DATA COMP_str_reasons[]=
{
{ERR_REASON(COMP_R_ZLIB_DEFLATE_ERROR) ,"zlib deflate error"},
{ERR_REASON(COMP_R_ZLIB_INFLATE_ERROR) ,"zlib inflate error"},
{ERR_REASON(COMP_R_ZLIB_NOT_SUPPORTED) ,"zlib not supported"},
{0,NULL}
};