764 lines
21 KiB
C
764 lines
21 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/objects.h>
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#include <openssl/comp.h>
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#include <openssl/err.h>
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COMP_METHOD *COMP_zlib(void);
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static COMP_METHOD zlib_method_nozlib = {
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NID_undef,
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"(undef)",
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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};
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#ifndef ZLIB
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# undef ZLIB_SHARED
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#else
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# include <zlib.h>
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static int zlib_stateful_init(COMP_CTX *ctx);
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static void zlib_stateful_finish(COMP_CTX *ctx);
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static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out,
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unsigned int olen, unsigned char *in,
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unsigned int ilen);
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static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out,
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unsigned int olen, unsigned char *in,
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unsigned int ilen);
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/* memory allocations functions for zlib intialization */
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static void *zlib_zalloc(void *opaque, unsigned int no, unsigned int size)
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{
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void *p;
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p = OPENSSL_malloc(no * size);
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if (p)
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memset(p, 0, no * size);
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return p;
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}
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static void zlib_zfree(void *opaque, void *address)
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{
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OPENSSL_free(address);
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}
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# if 0
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static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out,
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unsigned int olen, unsigned char *in,
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unsigned int ilen);
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static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out,
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unsigned int olen, unsigned char *in,
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unsigned int ilen);
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static int zz_uncompress(Bytef *dest, uLongf * destLen, const Bytef *source,
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uLong sourceLen);
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static COMP_METHOD zlib_stateless_method = {
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NID_zlib_compression,
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LN_zlib_compression,
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NULL,
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NULL,
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zlib_compress_block,
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zlib_expand_block,
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NULL,
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NULL,
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};
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# endif
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static COMP_METHOD zlib_stateful_method = {
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NID_zlib_compression,
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LN_zlib_compression,
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zlib_stateful_init,
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zlib_stateful_finish,
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zlib_stateful_compress_block,
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zlib_stateful_expand_block,
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NULL,
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NULL,
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};
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/*
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* When OpenSSL is built on Windows, we do not want to require that
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* the ZLIB.DLL be available in order for the OpenSSL DLLs to
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* work. Therefore, all ZLIB routines are loaded at run time
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* and we do not link to a .LIB file when ZLIB_SHARED is set.
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*/
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# if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
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# include <windows.h>
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# endif /* !(OPENSSL_SYS_WINDOWS ||
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* OPENSSL_SYS_WIN32) */
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# ifdef ZLIB_SHARED
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# include <openssl/dso.h>
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/* Function pointers */
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typedef int (*compress_ft) (Bytef *dest, uLongf * destLen,
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const Bytef *source, uLong sourceLen);
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typedef int (*inflateEnd_ft) (z_streamp strm);
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typedef int (*inflate_ft) (z_streamp strm, int flush);
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typedef int (*inflateInit__ft) (z_streamp strm,
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const char *version, int stream_size);
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typedef int (*deflateEnd_ft) (z_streamp strm);
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typedef int (*deflate_ft) (z_streamp strm, int flush);
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typedef int (*deflateInit__ft) (z_streamp strm, int level,
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const char *version, int stream_size);
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typedef const char *(*zError__ft) (int err);
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static compress_ft p_compress = NULL;
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static inflateEnd_ft p_inflateEnd = NULL;
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static inflate_ft p_inflate = NULL;
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static inflateInit__ft p_inflateInit_ = NULL;
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static deflateEnd_ft p_deflateEnd = NULL;
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static deflate_ft p_deflate = NULL;
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static deflateInit__ft p_deflateInit_ = NULL;
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static zError__ft p_zError = NULL;
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static int zlib_loaded = 0; /* only attempt to init func pts once */
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static DSO *zlib_dso = NULL;
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# define compress p_compress
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# define inflateEnd p_inflateEnd
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# define inflate p_inflate
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# define inflateInit_ p_inflateInit_
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# define deflateEnd p_deflateEnd
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# define deflate p_deflate
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# define deflateInit_ p_deflateInit_
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# define zError p_zError
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# endif /* ZLIB_SHARED */
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struct zlib_state {
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z_stream istream;
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z_stream ostream;
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};
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static int zlib_stateful_ex_idx = -1;
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static int zlib_stateful_init(COMP_CTX *ctx)
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{
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int err;
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struct zlib_state *state =
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(struct zlib_state *)OPENSSL_malloc(sizeof(struct zlib_state));
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if (state == NULL)
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goto err;
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state->istream.zalloc = zlib_zalloc;
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state->istream.zfree = zlib_zfree;
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state->istream.opaque = Z_NULL;
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state->istream.next_in = Z_NULL;
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state->istream.next_out = Z_NULL;
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state->istream.avail_in = 0;
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state->istream.avail_out = 0;
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err = inflateInit_(&state->istream, ZLIB_VERSION, sizeof(z_stream));
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if (err != Z_OK)
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goto err;
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state->ostream.zalloc = zlib_zalloc;
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state->ostream.zfree = zlib_zfree;
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state->ostream.opaque = Z_NULL;
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state->ostream.next_in = Z_NULL;
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state->ostream.next_out = Z_NULL;
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state->ostream.avail_in = 0;
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state->ostream.avail_out = 0;
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err = deflateInit_(&state->ostream, Z_DEFAULT_COMPRESSION,
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ZLIB_VERSION, sizeof(z_stream));
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if (err != Z_OK)
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goto err;
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CRYPTO_new_ex_data(CRYPTO_EX_INDEX_COMP, ctx, &ctx->ex_data);
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CRYPTO_set_ex_data(&ctx->ex_data, zlib_stateful_ex_idx, state);
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return 1;
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err:
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if (state)
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OPENSSL_free(state);
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return 0;
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}
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static void zlib_stateful_finish(COMP_CTX *ctx)
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{
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struct zlib_state *state =
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(struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data,
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zlib_stateful_ex_idx);
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inflateEnd(&state->istream);
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deflateEnd(&state->ostream);
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OPENSSL_free(state);
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_COMP, ctx, &ctx->ex_data);
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}
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static int zlib_stateful_compress_block(COMP_CTX *ctx, unsigned char *out,
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unsigned int olen, unsigned char *in,
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unsigned int ilen)
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{
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int err = Z_OK;
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struct zlib_state *state =
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(struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data,
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zlib_stateful_ex_idx);
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if (state == NULL)
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return -1;
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state->ostream.next_in = in;
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state->ostream.avail_in = ilen;
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state->ostream.next_out = out;
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state->ostream.avail_out = olen;
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if (ilen > 0)
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err = deflate(&state->ostream, Z_SYNC_FLUSH);
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if (err != Z_OK)
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return -1;
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# ifdef DEBUG_ZLIB
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fprintf(stderr, "compress(%4d)->%4d %s\n",
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ilen, olen - state->ostream.avail_out,
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(ilen != olen - state->ostream.avail_out) ? "zlib" : "clear");
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# endif
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return olen - state->ostream.avail_out;
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}
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static int zlib_stateful_expand_block(COMP_CTX *ctx, unsigned char *out,
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unsigned int olen, unsigned char *in,
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unsigned int ilen)
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{
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int err = Z_OK;
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struct zlib_state *state =
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(struct zlib_state *)CRYPTO_get_ex_data(&ctx->ex_data,
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zlib_stateful_ex_idx);
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if (state == NULL)
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return 0;
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state->istream.next_in = in;
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state->istream.avail_in = ilen;
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state->istream.next_out = out;
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state->istream.avail_out = olen;
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if (ilen > 0)
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err = inflate(&state->istream, Z_SYNC_FLUSH);
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if (err != Z_OK)
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return -1;
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# ifdef DEBUG_ZLIB
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fprintf(stderr, "expand(%4d)->%4d %s\n",
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ilen, olen - state->istream.avail_out,
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(ilen != olen - state->istream.avail_out) ? "zlib" : "clear");
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# endif
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return olen - state->istream.avail_out;
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}
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# if 0
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static int zlib_compress_block(COMP_CTX *ctx, unsigned char *out,
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unsigned int olen, unsigned char *in,
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unsigned int ilen)
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{
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unsigned long l;
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int i;
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int clear = 1;
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if (ilen > 128) {
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out[0] = 1;
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l = olen - 1;
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i = compress(&(out[1]), &l, in, (unsigned long)ilen);
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if (i != Z_OK)
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return (-1);
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if (ilen > l) {
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clear = 0;
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l++;
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}
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}
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if (clear) {
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out[0] = 0;
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memcpy(&(out[1]), in, ilen);
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l = ilen + 1;
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}
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# ifdef DEBUG_ZLIB
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fprintf(stderr, "compress(%4d)->%4d %s\n",
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ilen, (int)l, (clear) ? "clear" : "zlib");
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# endif
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return ((int)l);
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}
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static int zlib_expand_block(COMP_CTX *ctx, unsigned char *out,
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unsigned int olen, unsigned char *in,
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unsigned int ilen)
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{
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unsigned long l;
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int i;
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if (in[0]) {
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l = olen;
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i = zz_uncompress(out, &l, &(in[1]), (unsigned long)ilen - 1);
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if (i != Z_OK)
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return (-1);
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} else {
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memcpy(out, &(in[1]), ilen - 1);
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l = ilen - 1;
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}
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# ifdef DEBUG_ZLIB
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fprintf(stderr, "expand (%4d)->%4d %s\n",
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ilen, (int)l, in[0] ? "zlib" : "clear");
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# endif
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return ((int)l);
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}
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static int zz_uncompress(Bytef *dest, uLongf * destLen, const Bytef *source,
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uLong sourceLen)
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{
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z_stream stream;
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int err;
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stream.next_in = (Bytef *)source;
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stream.avail_in = (uInt) sourceLen;
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/* Check for source > 64K on 16-bit machine: */
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if ((uLong) stream.avail_in != sourceLen)
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return Z_BUF_ERROR;
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stream.next_out = dest;
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stream.avail_out = (uInt) * destLen;
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if ((uLong) stream.avail_out != *destLen)
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return Z_BUF_ERROR;
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stream.zalloc = (alloc_func) 0;
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stream.zfree = (free_func) 0;
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err = inflateInit_(&stream, ZLIB_VERSION, sizeof(z_stream));
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if (err != Z_OK)
|
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return err;
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|
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err = inflate(&stream, Z_FINISH);
|
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if (err != Z_STREAM_END) {
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inflateEnd(&stream);
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return err;
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}
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*destLen = stream.total_out;
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err = inflateEnd(&stream);
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return err;
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}
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# endif
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#endif
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COMP_METHOD *COMP_zlib(void)
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{
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COMP_METHOD *meth = &zlib_method_nozlib;
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#ifdef ZLIB_SHARED
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if (!zlib_loaded) {
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# if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
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zlib_dso = DSO_load(NULL, "ZLIB1", NULL, 0);
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# else
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zlib_dso = DSO_load(NULL, "z", NULL, 0);
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# endif
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if (zlib_dso != NULL) {
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p_compress = (compress_ft) DSO_bind_func(zlib_dso, "compress");
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p_inflateEnd
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= (inflateEnd_ft) DSO_bind_func(zlib_dso, "inflateEnd");
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p_inflate = (inflate_ft) DSO_bind_func(zlib_dso, "inflate");
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p_inflateInit_
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= (inflateInit__ft) DSO_bind_func(zlib_dso, "inflateInit_");
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p_deflateEnd
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= (deflateEnd_ft) DSO_bind_func(zlib_dso, "deflateEnd");
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p_deflate = (deflate_ft) DSO_bind_func(zlib_dso, "deflate");
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p_deflateInit_
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= (deflateInit__ft) DSO_bind_func(zlib_dso, "deflateInit_");
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p_zError = (zError__ft) DSO_bind_func(zlib_dso, "zError");
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if (p_compress && p_inflateEnd && p_inflate
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&& p_inflateInit_ && p_deflateEnd
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&& p_deflate && p_deflateInit_ && p_zError)
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zlib_loaded++;
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}
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}
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#endif
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#ifdef ZLIB_SHARED
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if (zlib_loaded)
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#endif
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#if defined(ZLIB) || defined(ZLIB_SHARED)
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{
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/*
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* init zlib_stateful_ex_idx here so that in a multi-process
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* application it's enough to intialize openssl before forking (idx
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* will be inherited in all the children)
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*/
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if (zlib_stateful_ex_idx == -1) {
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CRYPTO_w_lock(CRYPTO_LOCK_COMP);
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if (zlib_stateful_ex_idx == -1)
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zlib_stateful_ex_idx =
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CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_COMP,
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0, NULL, NULL, NULL, NULL);
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CRYPTO_w_unlock(CRYPTO_LOCK_COMP);
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if (zlib_stateful_ex_idx == -1)
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goto err;
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}
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meth = &zlib_stateful_method;
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}
|
|
err:
|
|
#endif
|
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|
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return (meth);
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}
|
|
|
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void COMP_zlib_cleanup(void)
|
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{
|
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#ifdef ZLIB_SHARED
|
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if (zlib_dso != NULL)
|
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DSO_free(zlib_dso);
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zlib_dso = NULL;
|
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#endif
|
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}
|
|
|
|
#ifdef ZLIB
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|
|
|
/* 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
|