aboutsummaryrefslogtreecommitdiffstats
path: root/g10/compress.c
diff options
context:
space:
mode:
Diffstat (limited to 'g10/compress.c')
-rw-r--r--g10/compress.c310
1 files changed, 0 insertions, 310 deletions
diff --git a/g10/compress.c b/g10/compress.c
deleted file mode 100644
index 6ea84f6cd..000000000
--- a/g10/compress.c
+++ /dev/null
@@ -1,310 +0,0 @@
-/* compress.c - compress filter
- * Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
- *
- * This file is part of GnuPG.
- *
- * GnuPG is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * GnuPG is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- */
-
-#include <config.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <assert.h>
-#include <errno.h>
-#include <zlib.h>
-
-#include "util.h"
-#include "memory.h"
-#include "packet.h"
-#include "filter.h"
-#include "main.h"
-#include "options.h"
-
-
-static void
-init_compress( compress_filter_context_t *zfx, z_stream *zs )
-{
- int rc;
- int level;
-
- if( opt.compress >= 0 && opt.compress <= 9 )
- level = opt.compress;
- else if( opt.compress == -1 )
- level = Z_DEFAULT_COMPRESSION;
- else if( opt.compress == 10 ) /* remove this ! */
- level = 0;
- else {
- log_error("invalid compression level; using default level\n");
- level = Z_DEFAULT_COMPRESSION;
- }
-
-
- if( (rc = zfx->algo == 1? deflateInit2( zs, level, Z_DEFLATED,
- -13, 8, Z_DEFAULT_STRATEGY)
- : deflateInit( zs, level )
- ) != Z_OK ) {
- log_fatal("zlib problem: %s\n", zs->msg? zs->msg :
- rc == Z_MEM_ERROR ? "out of core" :
- rc == Z_VERSION_ERROR ? "invalid lib version" :
- "unknown error" );
- }
-
- zfx->outbufsize = 8192;
- zfx->outbuf = m_alloc( zfx->outbufsize );
-}
-
-static int
-do_compress( compress_filter_context_t *zfx, z_stream *zs, int flush, IOBUF a )
-{
- int zrc;
- unsigned n;
-
- do {
-#ifndef __riscos__
- zs->next_out = zfx->outbuf;
-#else /* __riscos__ */
- zs->next_out = (Bytef *) zfx->outbuf;
-#endif /* __riscos__ */
- zs->avail_out = zfx->outbufsize;
- if( DBG_FILTER )
- log_debug("enter deflate: avail_in=%u, avail_out=%u, flush=%d\n",
- (unsigned)zs->avail_in, (unsigned)zs->avail_out, flush );
- zrc = deflate( zs, flush );
- if( zrc == Z_STREAM_END && flush == Z_FINISH )
- ;
- else if( zrc != Z_OK ) {
- if( zs->msg )
- log_fatal("zlib deflate problem: %s\n", zs->msg );
- else
- log_fatal("zlib deflate problem: rc=%d\n", zrc );
- }
- n = zfx->outbufsize - zs->avail_out;
- if( DBG_FILTER )
- log_debug("leave deflate: "
- "avail_in=%u, avail_out=%u, n=%u, zrc=%d\n",
- (unsigned)zs->avail_in, (unsigned)zs->avail_out,
- (unsigned)n, zrc );
-
- if( iobuf_write( a, zfx->outbuf, n ) ) {
- log_debug("deflate: iobuf_write failed\n");
- return G10ERR_WRITE_FILE;
- }
- } while( zs->avail_in || (flush == Z_FINISH && zrc != Z_STREAM_END) );
- return 0;
-}
-
-static void
-init_uncompress( compress_filter_context_t *zfx, z_stream *zs )
-{
- int rc;
-
- /****************
- * PGP uses a windowsize of 13 bits. Using a negative value for
- * it forces zlib not to expect a zlib header. This is a
- * undocumented feature Peter Gutmann told me about.
- */
- if( (rc = zfx->algo == 1? inflateInit2( zs, -13)
- : inflateInit( zs )) != Z_OK ) {
- log_fatal("zlib problem: %s\n", zs->msg? zs->msg :
- rc == Z_MEM_ERROR ? "out of core" :
- rc == Z_VERSION_ERROR ? "invalid lib version" :
- "unknown error" );
- }
-
- zfx->inbufsize = 2048;
- zfx->inbuf = m_alloc( zfx->inbufsize );
- zs->avail_in = 0;
-}
-
-static int
-do_uncompress( compress_filter_context_t *zfx, z_stream *zs,
- IOBUF a, size_t *ret_len )
-{
- int zrc;
- int rc=0;
- size_t n;
- int nread, count;
- int refill = !zs->avail_in;
-
- if( DBG_FILTER )
- log_debug("begin inflate: avail_in=%u, avail_out=%u, inbuf=%u\n",
- (unsigned)zs->avail_in, (unsigned)zs->avail_out,
- (unsigned)zfx->inbufsize );
- do {
- if( zs->avail_in < zfx->inbufsize && refill ) {
- n = zs->avail_in;
- if( !n )
-#ifndef __riscos__
- zs->next_in = zfx->inbuf;
-#else /* __riscos__ */
- zs->next_in = (Bytef *) zfx->inbuf;
-#endif /* __riscos__ */
- count = zfx->inbufsize - n;
- nread = iobuf_read( a, zfx->inbuf + n, count );
- if( nread == -1 ) nread = 0;
- n += nread;
- /* If we use the undocumented feature to suppress
- * the zlib header, we have to give inflate an
- * extra dummy byte to read */
- if( nread < count && zfx->algo == 1 ) {
- *(zfx->inbuf + n) = 0xFF; /* is it really needed ? */
- zfx->algo1hack = 1;
- n++;
- }
- zs->avail_in = n;
- }
- refill = 1;
- if( DBG_FILTER )
- log_debug("enter inflate: avail_in=%u, avail_out=%u\n",
- (unsigned)zs->avail_in, (unsigned)zs->avail_out);
-#ifdef Z_SYNC_FLUSH
- zrc = inflate( zs, Z_SYNC_FLUSH );
-#else
- zrc = inflate( zs, Z_PARTIAL_FLUSH );
-#endif
- if( DBG_FILTER )
- log_debug("leave inflate: avail_in=%u, avail_out=%u, zrc=%d\n",
- (unsigned)zs->avail_in, (unsigned)zs->avail_out, zrc);
- if( zrc == Z_STREAM_END )
- rc = -1; /* eof */
- else if( zrc != Z_OK && zrc != Z_BUF_ERROR ) {
- if( zs->msg )
- log_fatal("zlib inflate problem: %s\n", zs->msg );
- else
- log_fatal("zlib inflate problem: rc=%d\n", zrc );
- }
- } while( zs->avail_out && zrc != Z_STREAM_END && zrc != Z_BUF_ERROR );
- *ret_len = zfx->outbufsize - zs->avail_out;
- if( DBG_FILTER )
- log_debug("do_uncompress: returning %u bytes\n", (unsigned)*ret_len );
- return rc;
-}
-
-int
-compress_filter( void *opaque, int control,
- IOBUF a, byte *buf, size_t *ret_len)
-{
- size_t size = *ret_len;
- compress_filter_context_t *zfx = opaque;
- z_stream *zs = zfx->opaque;
- int rc=0;
-
- if( control == IOBUFCTRL_UNDERFLOW ) {
- if( !zfx->status ) {
- zs = zfx->opaque = m_alloc_clear( sizeof *zs );
- init_uncompress( zfx, zs );
- zfx->status = 1;
- }
-
-#ifndef __riscos__
- zs->next_out = buf;
-#else /* __riscos__ */
- zs->next_out = (Bytef *) buf;
-#endif /* __riscos__ */
- zs->avail_out = size;
- zfx->outbufsize = size; /* needed only for calculation */
- rc = do_uncompress( zfx, zs, a, ret_len );
- }
- else if( control == IOBUFCTRL_FLUSH ) {
- if( !zfx->status ) {
- PACKET pkt;
- PKT_compressed cd;
-
- if( !zfx->algo )
- zfx->algo = DEFAULT_COMPRESS_ALGO;
- if( zfx->algo != 1 && zfx->algo != 2 )
- BUG();
- memset( &cd, 0, sizeof cd );
- cd.len = 0;
- cd.algorithm = zfx->algo;
- init_packet( &pkt );
- pkt.pkttype = PKT_COMPRESSED;
- pkt.pkt.compressed = &cd;
- if( build_packet( a, &pkt ))
- log_bug("build_packet(PKT_COMPRESSED) failed\n");
- zs = zfx->opaque = m_alloc_clear( sizeof *zs );
- init_compress( zfx, zs );
- zfx->status = 2;
- }
-
-#ifndef __riscos__
- zs->next_in = buf;
-#else /* __riscos__ */
- zs->next_in = (Bytef *) buf;
-#endif /* __riscos__ */
- zs->avail_in = size;
- rc = do_compress( zfx, zs, Z_NO_FLUSH, a );
- }
- else if( control == IOBUFCTRL_FREE ) {
- if( zfx->status == 1 ) {
- inflateEnd(zs);
- m_free(zs);
- zfx->opaque = NULL;
- m_free(zfx->outbuf); zfx->outbuf = NULL;
- }
- else if( zfx->status == 2 ) {
-#ifndef __riscos__
- zs->next_in = buf;
-#else /* __riscos__ */
- zs->next_in = (Bytef *) buf;
-#endif /* __riscos__ */
- zs->avail_in = 0;
- do_compress( zfx, zs, Z_FINISH, a );
- deflateEnd(zs);
- m_free(zs);
- zfx->opaque = NULL;
- m_free(zfx->outbuf); zfx->outbuf = NULL;
- }
- if (zfx->release)
- zfx->release (zfx);
- }
- else if( control == IOBUFCTRL_DESC )
- *(char**)buf = "compress_filter";
- return rc;
-}
-
-
-static void
-release_context (compress_filter_context_t *ctx)
-{
- m_free (ctx);
-}
-
-/****************
- * Handle a compressed packet
- */
-int
-handle_compressed( void *procctx, PKT_compressed *cd,
- int (*callback)(IOBUF, void *), void *passthru )
-{
- compress_filter_context_t *cfx;
- int rc;
-
- if( cd->algorithm < 1 || cd->algorithm > 2 )
- return G10ERR_COMPR_ALGO;
- cfx = m_alloc_clear (sizeof *cfx);
- cfx->algo = cd->algorithm;
- cfx->release = release_context;
- iobuf_push_filter( cd->buf, compress_filter, cfx );
- if( callback )
- rc = callback(cd->buf, passthru );
- else
- rc = proc_packets(procctx, cd->buf);
- cd->buf = NULL;
- return rc;
-}
-
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-29 11:30:27 +0000