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-rw-r--r--openssl/crypto/comp/c_zlib.c799
1 files changed, 799 insertions, 0 deletions
diff --git a/openssl/crypto/comp/c_zlib.c b/openssl/crypto/comp/c_zlib.c
new file mode 100644
index 00000000..8adf35f3
--- /dev/null
+++ b/openssl/crypto/comp/c_zlib.c
@@ -0,0 +1,799 @@
+#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
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 13:47:35 +0000