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/* Literal.c - Literal packet filters
* Copyright (C) 2002, 2003 Timo Schulz
*
* This file is part of OpenCDK.
*
* OpenCDK 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.
*
* OpenCDK 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.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include "opencdk.h"
#include "main.h"
#include "filters.h"
static cdk_error_t
literal_decode (void * opaque, FILE * in, FILE * out)
{
literal_filter_t *pfx = opaque;
cdk_stream_t si, so;
cdk_packet_t pkt;
cdk_pkt_literal_t pt;
byte buf[BUFSIZE];
size_t nread;
int bufsize;
cdk_error_t rc;
_cdk_log_debug( "literal filter: decode\n" );
if (!pfx || !in || !out)
return CDK_Inv_Value;
rc = _cdk_stream_fpopen (in, STREAMCTL_READ, &si);
if (rc)
return rc;
cdk_pkt_new (&pkt);
rc = cdk_pkt_read (si, pkt);
if (rc)
{
cdk_stream_close (si);
return rc;
}
if (pkt->pkttype != CDK_PKT_LITERAL)
{
cdk_pkt_release (pkt);
cdk_stream_close (si);
return CDK_Inv_Packet;
}
rc = _cdk_stream_fpopen (out, STREAMCTL_WRITE, &so);
if (rc)
{
cdk_pkt_release (pkt);
cdk_stream_close (si);
return rc;
}
pt = pkt->pkt.literal;
pfx->mode = pt->mode;
pfx->filename = cdk_strdup (pt->name? pt->name : " ");
if (!pfx->filename)
{
/* FIXME: release streams. */
cdk_pkt_release (pkt);
return CDK_Out_Of_Core;
}
while (!feof (in))
{
/*_cdk_log_debug( "partial on=%d size=%lu\n",
pfx->blkmode.on, pfx->blkmode.size );*/
if (pfx->blkmode.on)
bufsize = pfx->blkmode.size;
else
bufsize = pt->len < DIM (buf)-1? pt->len : DIM (buf)-1;
nread = cdk_stream_read (pt->buf, buf, bufsize);
if (nread == EOF)
{
rc = CDK_File_Error;
break;
}
if (pfx->md)
gcry_md_write (pfx->md, buf, nread);
cdk_stream_write (so, buf, nread);
pt->len -= nread;
if (pfx->blkmode.on)
{
pfx->blkmode.size = _cdk_pkt_read_len (in, &pfx->blkmode.on);
if (pfx->blkmode.size == (size_t)EOF)
return CDK_Inv_Packet;
}
if (pt->len <= 0 && !pfx->blkmode.on)
break;
}
cdk_stream_close (si);
cdk_stream_close (so);
cdk_pkt_release (pkt);
return rc;
}
static cdk_error_t
literal_encode (void *opaque, FILE *in, FILE *out)
{
literal_filter_t *pfx = opaque;
cdk_pkt_literal_t pt;
cdk_stream_t si;
cdk_packet_t pkt;
size_t filelen;
cdk_error_t rc;
_cdk_log_debug ("literal filter: encode\n");
if (!pfx || !in || !out)
return CDK_Inv_Value;
if (!pfx->filename)
{
pfx->filename = cdk_strdup ("_CONSOLE");
if (!pfx->filename)
return CDK_Out_Of_Core;
}
rc = _cdk_stream_fpopen (in, STREAMCTL_READ, &si);
if (rc)
return rc;
filelen = strlen (pfx->filename);
cdk_pkt_new (&pkt);
pt = pkt->pkt.literal = cdk_calloc (1, sizeof *pt + filelen - 1);
if (!pt)
{
cdk_pkt_release (pkt);
cdk_stream_close (si);
return CDK_Out_Of_Core;
}
memcpy (pt->name, pfx->filename, filelen);
pt->namelen = filelen;
pt->name[pt->namelen] = '\0';
pt->timestamp = _cdk_timestamp ();
pt->mode = pfx->mode ? 't' : 'b';
pt->len = cdk_stream_get_length (si);
pt->buf = si;
pkt->old_ctb = pfx->rfc1991? 1 : 0;
pkt->pkttype = CDK_PKT_LITERAL;
pkt->pkt.literal = pt;
rc = _cdk_pkt_write_fp (out, pkt);
cdk_pkt_release (pkt);
cdk_stream_close (si);
return rc;
}
int
_cdk_filter_literal( void * opaque, int ctl, FILE * in, FILE * out )
{
if( ctl == STREAMCTL_READ )
return literal_decode( opaque, in, out );
else if( ctl == STREAMCTL_WRITE )
return literal_encode( opaque, in, out );
else if( ctl == STREAMCTL_FREE ) {
literal_filter_t * pfx = opaque;
if( pfx ) {
_cdk_log_debug( "free literal filter\n" );
cdk_free( pfx->filename );
pfx->filename = NULL;
}
}
return CDK_Inv_Mode;
}
static int
text_encode (void *opaque, FILE *in, FILE *out)
{
const char *s;
char buf[1024];
if (!in || !out)
return CDK_Inv_Value;
while (!feof (in))
{
s = fgets (buf, DIM (buf)-1, in);
if (!s)
break;
_cdk_trim_string (buf, 1);
fwrite (buf, 1, strlen (buf), out);
}
return 0;
}
static int
text_decode( void * opaque, FILE * in, FILE * out )
{
text_filter_t * tfx = opaque;
const char * s;
char buf[1024];
if( !tfx || !in || !out )
return CDK_Inv_Value;
while( !feof( in ) ) {
s = fgets( buf, DIM (buf)-1, in );
if( !s )
break;
_cdk_trim_string( buf, 0 );
fwrite( buf, 1, strlen( buf ), out );
fwrite( tfx->lf, 1, strlen( tfx->lf ), out );
}
return 0;
}
int
_cdk_filter_text( void * opaque, int ctl, FILE * in, FILE * out )
{
if( ctl == STREAMCTL_READ )
return text_encode( opaque, in, out );
else if( ctl == STREAMCTL_WRITE )
return text_decode( opaque, in, out );
else if( ctl == STREAMCTL_FREE ) {
text_filter_t * tfx = opaque;
if( tfx ) {
_cdk_log_debug( "free text filter\n" );
tfx->lf = NULL;
}
}
return CDK_Inv_Mode;
}
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