619 lines
17 KiB
C
619 lines
17 KiB
C
/*
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* Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#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 "internal/comp.h"
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#include <openssl/err.h>
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#include "internal/cryptlib_int.h"
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#include "internal/bio.h"
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#include "comp_lcl.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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};
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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 initialisation */
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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_zalloc(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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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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};
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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 "internal/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_init(COMP_CTX *ctx)
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{
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int err;
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struct zlib_state *state = OPENSSL_zalloc(sizeof(*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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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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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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ctx->data = state;
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return 1;
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err:
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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 = ctx->data;
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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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}
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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 = ctx->data;
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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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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 = ctx->data;
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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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return olen - state->istream.avail_out;
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}
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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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/* LIBZ may be externally defined, and we should respect that value */
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# ifndef LIBZ
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# if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
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# define LIBZ "ZLIB1"
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# elif defined(OPENSSL_SYS_VMS)
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# define LIBZ "LIBZ"
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# else
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# define LIBZ "z"
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# endif
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# endif
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if (!zlib_loaded) {
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zlib_dso = DSO_load(NULL, LIBZ, NULL, 0);
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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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if (!OPENSSL_init_crypto(OPENSSL_INIT_ZLIB, NULL)) {
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comp_zlib_cleanup_int();
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return meth;
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}
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if (zlib_loaded)
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meth = &zlib_stateful_method;
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}
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}
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#endif
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#if defined(ZLIB)
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meth = &zlib_stateful_method;
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#endif
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return (meth);
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}
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void comp_zlib_cleanup_int(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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}
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#ifdef ZLIB
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/* Zlib based compression/decompression filter BIO */
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typedef struct {
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unsigned char *ibuf; /* Input buffer */
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int ibufsize; /* Buffer size */
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z_stream zin; /* Input decompress context */
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unsigned char *obuf; /* Output buffer */
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int obufsize; /* Output buffer size */
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unsigned char *optr; /* Position in output buffer */
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int ocount; /* Amount of data in output buffer */
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int odone; /* deflate EOF */
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int comp_level; /* Compression level to use */
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z_stream zout; /* Output compression context */
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} BIO_ZLIB_CTX;
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# define ZLIB_DEFAULT_BUFSIZE 1024
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static int bio_zlib_new(BIO *bi);
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static int bio_zlib_free(BIO *bi);
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static int bio_zlib_read(BIO *b, char *out, int outl);
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static int bio_zlib_write(BIO *b, const char *in, int inl);
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static long bio_zlib_ctrl(BIO *b, int cmd, long num, void *ptr);
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static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp);
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static const BIO_METHOD bio_meth_zlib = {
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BIO_TYPE_COMP,
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"zlib",
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/* TODO: Convert to new style write function */
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bwrite_conv,
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bio_zlib_write,
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/* TODO: Convert to new style read function */
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bread_conv,
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bio_zlib_read,
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NULL,
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NULL,
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bio_zlib_ctrl,
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bio_zlib_new,
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bio_zlib_free,
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bio_zlib_callback_ctrl
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};
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const BIO_METHOD *BIO_f_zlib(void)
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{
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return &bio_meth_zlib;
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}
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static int bio_zlib_new(BIO *bi)
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{
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BIO_ZLIB_CTX *ctx;
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# ifdef ZLIB_SHARED
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(void)COMP_zlib();
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if (!zlib_loaded) {
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COMPerr(COMP_F_BIO_ZLIB_NEW, COMP_R_ZLIB_NOT_SUPPORTED);
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return 0;
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}
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# endif
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ctx = OPENSSL_zalloc(sizeof(*ctx));
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if (ctx == NULL) {
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COMPerr(COMP_F_BIO_ZLIB_NEW, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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ctx->ibufsize = ZLIB_DEFAULT_BUFSIZE;
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ctx->obufsize = ZLIB_DEFAULT_BUFSIZE;
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ctx->zin.zalloc = Z_NULL;
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ctx->zin.zfree = Z_NULL;
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ctx->zout.zalloc = Z_NULL;
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ctx->zout.zfree = Z_NULL;
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ctx->comp_level = Z_DEFAULT_COMPRESSION;
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BIO_set_init(bi, 1);
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BIO_set_data(bi, ctx);
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return 1;
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}
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static int bio_zlib_free(BIO *bi)
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{
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BIO_ZLIB_CTX *ctx;
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if (!bi)
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return 0;
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ctx = BIO_get_data(bi);
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if (ctx->ibuf) {
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/* Destroy decompress context */
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inflateEnd(&ctx->zin);
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OPENSSL_free(ctx->ibuf);
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}
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if (ctx->obuf) {
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/* Destroy compress context */
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deflateEnd(&ctx->zout);
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OPENSSL_free(ctx->obuf);
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}
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OPENSSL_free(ctx);
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BIO_set_data(bi, NULL);
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BIO_set_init(bi, 0);
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return 1;
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}
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static int bio_zlib_read(BIO *b, char *out, int outl)
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{
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BIO_ZLIB_CTX *ctx;
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int ret;
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z_stream *zin;
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BIO *next = BIO_next(b);
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if (!out || !outl)
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return 0;
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ctx = BIO_get_data(b);
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zin = &ctx->zin;
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BIO_clear_retry_flags(b);
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if (!ctx->ibuf) {
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ctx->ibuf = OPENSSL_malloc(ctx->ibufsize);
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if (ctx->ibuf == NULL) {
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COMPerr(COMP_F_BIO_ZLIB_READ, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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inflateInit(zin);
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zin->next_in = ctx->ibuf;
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zin->avail_in = 0;
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}
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/* Copy output data directly to supplied buffer */
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zin->next_out = (unsigned char *)out;
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zin->avail_out = (unsigned int)outl;
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for (;;) {
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/* Decompress while data available */
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while (zin->avail_in) {
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ret = inflate(zin, 0);
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if ((ret != Z_OK) && (ret != Z_STREAM_END)) {
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COMPerr(COMP_F_BIO_ZLIB_READ, COMP_R_ZLIB_INFLATE_ERROR);
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ERR_add_error_data(2, "zlib error:", zError(ret));
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return 0;
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}
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/* If EOF or we've read everything then return */
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if ((ret == Z_STREAM_END) || !zin->avail_out)
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return outl - zin->avail_out;
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}
|
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|
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/*
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* No data in input buffer try to read some in, if an error then
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* return the total data read.
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*/
|
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ret = BIO_read(next, ctx->ibuf, ctx->ibufsize);
|
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if (ret <= 0) {
|
|
/* Total data read */
|
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int tot = outl - zin->avail_out;
|
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BIO_copy_next_retry(b);
|
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if (ret < 0)
|
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return (tot > 0) ? tot : ret;
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return tot;
|
|
}
|
|
zin->avail_in = ret;
|
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zin->next_in = ctx->ibuf;
|
|
}
|
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}
|
|
|
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static int bio_zlib_write(BIO *b, const char *in, int inl)
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{
|
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BIO_ZLIB_CTX *ctx;
|
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int ret;
|
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z_stream *zout;
|
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BIO *next = BIO_next(b);
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|
|
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if (!in || !inl)
|
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return 0;
|
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ctx = BIO_get_data(b);
|
|
if (ctx->odone)
|
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return 0;
|
|
zout = &ctx->zout;
|
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BIO_clear_retry_flags(b);
|
|
if (!ctx->obuf) {
|
|
ctx->obuf = OPENSSL_malloc(ctx->obufsize);
|
|
/* Need error here */
|
|
if (ctx->obuf == NULL) {
|
|
COMPerr(COMP_F_BIO_ZLIB_WRITE, ERR_R_MALLOC_FAILURE);
|
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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(next, 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;
|
|
BIO *next = BIO_next(b);
|
|
|
|
ctx = BIO_get_data(b);
|
|
/* 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(next, 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;
|
|
BIO *next = BIO_next(b);
|
|
|
|
if (next == NULL)
|
|
return 0;
|
|
ctx = BIO_get_data(b);
|
|
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(next);
|
|
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(next, cmd, num, ptr);
|
|
BIO_copy_next_retry(b);
|
|
break;
|
|
|
|
default:
|
|
ret = BIO_ctrl(next, cmd, num, ptr);
|
|
break;
|
|
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static long bio_zlib_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
|
|
{
|
|
BIO *next = BIO_next(b);
|
|
if (next == NULL)
|
|
return 0;
|
|
return BIO_callback_ctrl(next, cmd, fp);
|
|
}
|
|
|
|
#endif
|