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b008274afd
We better do this once and for all instead of cluttering all future commits with diffs of trailing white spaces. In the majority of cases blank or single lines are affected and thus this change won't disturb a git blame too much. For future commits the pre-commit scripts checks that this won't happen again.
75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
/* mdfilter.c - filter data and calculate a message digest
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* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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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 <errno.h>
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#include <assert.h>
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#include "gpg.h"
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#include "status.h"
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#include "iobuf.h"
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#include "util.h"
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#include "filter.h"
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/****************
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* This filter is used to collect a message digest
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*/
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int
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md_filter( void *opaque, int control,
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IOBUF a, byte *buf, size_t *ret_len)
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{
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size_t size = *ret_len;
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md_filter_context_t *mfx = opaque;
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int i, rc=0;
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if( control == IOBUFCTRL_UNDERFLOW ) {
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if( mfx->maxbuf_size && size > mfx->maxbuf_size )
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size = mfx->maxbuf_size;
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i = iobuf_read( a, buf, size );
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if( i == -1 ) i = 0;
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if( i ) {
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gcry_md_write(mfx->md, buf, i );
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if( mfx->md2 )
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gcry_md_write(mfx->md2, buf, i );
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}
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else
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rc = -1; /* eof */
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*ret_len = i;
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}
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else if( control == IOBUFCTRL_DESC )
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*(char**)buf = "md_filter";
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return rc;
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}
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void
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free_md_filter_context( md_filter_context_t *mfx )
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{
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gcry_md_close(mfx->md);
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gcry_md_close(mfx->md2);
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mfx->md = NULL;
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mfx->md2 = NULL;
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mfx->maxbuf_size = 0;
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}
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