mirror of git://git.gnupg.org/gnupg.git
207 lines
6.7 KiB
C
207 lines
6.7 KiB
C
/* filter.h
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* Copyright (C) 1998, 1999, 2000, 2001, 2003,
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* 2005 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 <https://www.gnu.org/licenses/>.
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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 "../common/types.h"
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#include "dek.h"
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typedef struct {
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gcry_md_hd_t md; /* catch all */
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gcry_md_hd_t 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 md_thd_filter_context *md_thd_filter_context_t;
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void md_thd_filter_set_md (md_thd_filter_context_t mfx, gcry_md_hd_t md);
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typedef struct {
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int refcount; /* Initialized to 1. */
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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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int dearmor_mode; /* dearmor all kind of stuff. */
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const char *hdrlines; /* write these headerlines */
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/* these fields must be initialized to zero */
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int no_openpgp_data; /* output flag: "No valid OpenPGP data found" */
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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 dearmor_state; /* helper for dearmor_mode. */
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byte eol[3]; /* The end of line characters as a
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zero-terminated string. Defaults
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(eol[0]=='\0') to whatever the local
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platform uses. */
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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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gcry_md_hd_t crc_md;
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int status; /* an internal state flag */
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int cancel;
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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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struct compress_filter_context_s {
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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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int new_ctb;
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void (*release)(struct compress_filter_context_s*);
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};
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typedef struct compress_filter_context_s compress_filter_context_t;
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typedef struct
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{
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/* Object with the key and algo */
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DEK *dek;
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/* Length of the data to encrypt if known - 32 bit because OpenPGP
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* requires partial encoding for a larger data size. */
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u32 datalen;
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/* The current cipher handle. */
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gcry_cipher_hd_t cipher_hd;
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/* Various processing flags. */
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unsigned int wrote_header : 1;
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unsigned int short_blklen_warn : 1;
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unsigned long short_blklen_count;
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/* The encoded chunk byte for AEAD. */
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byte chunkbyte;
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/* The decoded CHUNKBYTE. */
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uint64_t chunksize;
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/* The chunk index for AEAD. */
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uint64_t chunkindex;
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/* The number of bytes in the current chunk. */
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uint64_t chunklen;
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/* The total count of encrypted plaintext octets. Note that we
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* don't care about encrypting more than 16 Exabyte. */
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uint64_t total;
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/* The hash context and a buffer used for MDC. */
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gcry_md_hd_t mdc_hash;
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byte enchash[20];
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/* The start IV for AEAD encryption. */
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byte startiv[16];
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/* Using a large buffer for encryption makes processing easier and
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* also makes sure the data is well aligned. */
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char *buffer;
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size_t bufsize; /* Allocated length. */
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size_t buflen; /* Used length. */
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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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gcry_md_hd_t 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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typedef struct {
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char *what; /* description */
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u32 last_time; /* last time reported */
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uint64_t last; /* last amount reported */
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uint64_t offset; /* current amount */
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uint64_t total; /* total amount */
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int refcount;
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} progress_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_t a, byte *buf, size_t *ret_len);
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int md_thd_filter( void *opaque, int control, iobuf_t 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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armor_filter_context_t *new_armor_context (void);
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void release_armor_context (armor_filter_context_t *afx);
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int push_armor_filter (armor_filter_context_t *afx, iobuf_t iobuf);
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int use_armor_filter( iobuf_t a );
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/*-- compress.c --*/
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gpg_error_t push_compress_filter (iobuf_t out, compress_filter_context_t *zfx,
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int algo);
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gpg_error_t push_compress_filter2 (iobuf_t out,compress_filter_context_t *zfx,
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int algo, int rel);
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/*-- cipher.c --*/
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int cipher_filter_cfb (void *opaque, int control,
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iobuf_t chain, byte *buf, size_t *ret_len);
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/*-- cipher-aead.c --*/
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int cipher_filter_aead (void *opaque, int control,
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iobuf_t 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_t chain, byte *buf, size_t *ret_len);
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int copy_clearsig_text (iobuf_t out, iobuf_t inp, gcry_md_hd_t md,
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int escape_dash, int escape_from);
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/*-- progress.c --*/
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progress_filter_context_t *new_progress_context (void);
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void release_progress_context (progress_filter_context_t *pfx);
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void handle_progress (progress_filter_context_t *pfx,
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iobuf_t inp, const char *name);
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#endif /*G10_FILTER_H*/
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