+/* ====================================================================
+ * Copyright (c) 1999-2015 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
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include "objects.h"
-#include "comp.h"
+#include <openssl/objects.h>
+#include <openssl/comp.h>
+#include <openssl/err.h>
+#include "comp_lcl.h"
+
+COMP_METHOD *COMP_zlib(void);
-COMP_METHOD *COMP_zlib(void );
+static COMP_METHOD zlib_method_nozlib = {
+ NID_undef,
+ "(undef)",
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+};
#ifndef ZLIB
+# undef ZLIB_SHARED
+#else
-static COMP_METHOD zlib_method={
- NID_undef,
- "(null)",
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- };
+# include <zlib.h>
-#else
+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);
+}
+
+
+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
+};
-#include <zlib.h>
-
-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_method={
- NID_zlib_compression,
- LN_zlib_compression,
- NULL,
- NULL,
- zlib_compress_block,
- zlib_expand_block,
- NULL,
- };
-
-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;
- }
-fprintf(stderr,"compress(%4d)->%4d %s\n",ilen,(int)l,(clear)?"clear":"zlib");
- 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;
- }
- fprintf(stderr,"expand (%4d)->%4d %s\n",ilen,(int)l,in[0]?"zlib":"clear");
- return((int)l);
- }
-
-static int zz_uncompress (Bytef *dest, uLongf *destLen, const Bytef *source,
- uLong sourceLen)
-{
- z_stream stream;
+/*
+ * 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_init(COMP_CTX *ctx)
+{
int err;
+ struct zlib_state *state = OPENSSL_malloc(sizeof(*state));
- 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;
+ if (state == NULL)
+ goto err;
- stream.next_out = dest;
- stream.avail_out = (uInt)*destLen;
- if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
+ 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;
- stream.zalloc = (alloc_func)0;
- stream.zfree = (free_func)0;
+ 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;
- err = inflateInit(&stream);
- if (err != Z_OK) return err;
+ ctx->data = state;
+ return 1;
+ err:
+ OPENSSL_free(state);
+ return 0;
+}
- err = inflate(&stream, Z_FINISH);
- if (err != Z_STREAM_END) {
- inflateEnd(&stream);
- return err;
- }
- *destLen = stream.total_out;
+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;
- err = inflateEnd(&stream);
- return err;
+ 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 = 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;
+# 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;
}
#endif
COMP_METHOD *COMP_zlib(void)
- {
- return(&zlib_method);
- }
+{
+ 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++;
+ if (zlib_loaded)
+ meth = &zlib_stateful_method;
+ }
+ }
+#endif
+#if defined(ZLIB)
+ meth = &zlib_stateful_method;
+#endif
+
+ return (meth);
+}
+
+void COMP_zlib_cleanup(void)
+{
+#ifdef ZLIB_SHARED
+ if (zlib_dso != NULL)
+ 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 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(*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) {
+ 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(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
projects / openssl.git / blobdiff