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128 lines
3.8 KiB
C
128 lines
3.8 KiB
C
/* filter.h
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* Copyright (C) 1998 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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifndef G10_FILTER_H
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#define G10_FILTER_H
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#include "types.h"
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#include "cipher.h"
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typedef struct {
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MD_HANDLE md; /* catch all */
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MD_HANDLE md2; /* if we want to calculate an alternate hash */
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size_t maxbuf_size;
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} md_filter_context_t;
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typedef struct {
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/* these fields may be initialized */
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int what; /* what kind of armor headers to write */
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int only_keyblocks; /* skip all headers but ".... key block" */
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const char *hdrlines; /* write these headerlines */
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/* the following fields must be initialized to zero */
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int inp_checked; /* set if the input has been checked */
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int inp_bypass; /* set if the input is not armored */
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int in_cleartext; /* clear text message */
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int not_dash_escaped; /* clear text is not dash escaped */
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int hashes; /* detected hash algorithms */
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int faked; /* we are faking a literal data packet */
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int truncated; /* number of truncated lines */
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int qp_detected;
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int pgp2mode;
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byte *buffer; /* malloced buffer */
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unsigned buffer_size; /* and size of this buffer */
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unsigned buffer_len; /* used length of the buffer */
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unsigned buffer_pos; /* read position */
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byte radbuf[4];
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int idx, idx2;
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u32 crc;
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int status; /* an internal state flag */
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int any_data; /* any valid armored data seen */
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int pending_lf; /* used together with faked */
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} armor_filter_context_t;
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typedef struct {
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int status;
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void *opaque; /* (used for z_stream) */
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byte *inbuf;
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unsigned inbufsize;
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byte *outbuf;
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unsigned outbufsize;
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int algo; /* compress algo */
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int algo1hack;
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} compress_filter_context_t;
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typedef struct {
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DEK *dek;
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u32 datalen;
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CIPHER_HANDLE cipher_hd;
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int header;
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MD_HANDLE mdc_hash;
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} cipher_filter_context_t;
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typedef struct {
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byte *buffer; /* malloced buffer */
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unsigned buffer_size; /* and size of this buffer */
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unsigned buffer_len; /* used length of the buffer */
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unsigned buffer_pos; /* read position */
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int truncated; /* number of truncated lines */
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int not_dash_escaped;
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int escape_from;
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MD_HANDLE md;
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int pending_lf;
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int pending_esc;
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} text_filter_context_t;
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/* encrypt_filter_context_t defined in main.h */
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/*-- mdfilter.c --*/
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int md_filter( void *opaque, int control, IOBUF a, byte *buf, size_t *ret_len);
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void free_md_filter_context( md_filter_context_t *mfx );
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/*-- armor.c --*/
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int use_armor_filter( IOBUF a );
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int armor_filter( void *opaque, int control,
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IOBUF chain, byte *buf, size_t *ret_len);
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/*-- compress.c --*/
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int compress_filter( void *opaque, int control,
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IOBUF chain, byte *buf, size_t *ret_len);
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/*-- cipher.c --*/
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int cipher_filter( void *opaque, int control,
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IOBUF chain, byte *buf, size_t *ret_len);
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/*-- textfilter.c --*/
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int text_filter( void *opaque, int control,
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IOBUF chain, byte *buf, size_t *ret_len);
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int copy_clearsig_text( IOBUF out, IOBUF inp, MD_HANDLE md,
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int escape_dash, int escape_from, int pgp2mode );
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#endif /*G10_FILTER_H*/
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