lib/opencdk/filters.h

   1 /* filters.h - Filter structs
   2  * Copyright (C) 2002-2012 Free Software Foundation, Inc.
   3  *
   4  * Author: Timo Schulz
   5  *
   6  * This file is part of OpenCDK.
   7  *
   8  * The OpenCDK library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; either version 3 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  20  *
  21  */
  22
  23 #ifndef CDK_FILTERS_H
  24 #define CDK_FILTERS_H
  25
  26 enum
  27 {
  28   STREAMCTL_READ = 0,
  29   STREAMCTL_WRITE = 1,
  30   STREAMCTL_FREE = 2
  31 };
  32
  33 typedef struct
  34 {
  35   cipher_hd_st hd;
  36   digest_hd_st mdc;
  37   int mdc_method;
  38   u32 datalen;
  39   struct
  40   {
  41     size_t on;
  42     off_t size;
  43     off_t nleft;
  44   } blkmode;
  45   cdk_stream_t s;
  46 } cipher_filter_t;
  47
  48 typedef struct
  49 {
  50   int digest_algo;
  51   digest_hd_st md;
  52   int md_initialized;
  53 } md_filter_t;
  54
  55 typedef struct
  56 {
  57   const char *le;               /* line endings */
  58   const char *hdrlines;
  59   u32 crc;
  60   int crc_okay;
  61   int idx, idx2;
  62 } armor_filter_t;
  63
  64 typedef struct
  65 {
  66   cdk_lit_format_t mode;
  67   char *orig_filename;          /* This original name of the input file. */
  68   char *filename;
  69   digest_hd_st md;
  70   int md_initialized;
  71   struct
  72   {
  73     size_t on;
  74     off_t size;
  75   } blkmode;
  76 } literal_filter_t;
  77
  78 typedef struct
  79 {
  80   size_t inbufsize;
  81   byte inbuf[8192];
  82   size_t outbufsize;
  83   byte outbuf[8192];
  84   int algo;                     /* compress algo */
  85   int level;
  86 } compress_filter_t;
  87
  88 typedef struct
  89 {
  90   const char *lf;
  91 } text_filter_t;
  92
  93
  94 /*-- armor.c -*/
  95 int _cdk_filter_armor (void *uint8_t, int ctl, FILE * in, FILE * out);
  96
  97 /*-- cipher.c --*/
  98 cdk_error_t _cdk_filter_hash (void *uint8_t, int ctl, FILE * in, FILE * out);
  99 cdk_error_t _cdk_filter_cipher (void *uint8_t, int ctl, FILE * in, FILE * out);
 100
 101 /*-- literal.c --*/
 102 int _cdk_filter_literal (void *uint8_t, int ctl, FILE * in, FILE * out);
 103 int _cdk_filter_text (void *uint8_t, int ctl, FILE * in, FILE * out);
 104
 105 /*-- compress.c --*/
 106 cdk_error_t _cdk_filter_compress (void *uint8_t, int ctl,
 107                                   FILE * in, FILE * out);
 108
 109 #endif /* CDK_FILTERS_H */