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gpg: Add stub function for encrypting AEAD.

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* g10/cipher.c (cipher_filter): Rename to cipher_filter_cfb.
* g10/cipher-aead.c: New.  Right now only with a stub function.
* g10/Makefile.am (gpg_sources): Add file.
* g10/encrypt.c (encrypt_simple): Push either cipher_filter_cfb or
cipher_filter_aead.
(encrypt_crypt): Ditto.
(encrypt_filter): Ditto.
* g10/sign.c (sign_symencrypt_file): Ditto.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2018-01-10 17:33:50 +01:00
parent 4e2ba546cd
commit 81d71818d0
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
7 changed files with 95 additions and 10 deletions
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67
g10/cipher-aead.c Normal file
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/* cipher-aead.c - Enciphering filter for AEAD modes
* Copyright (C) 2018 Werner koch
*
* This file is part of GnuPG.
*
* GnuPG 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 3 of the License, or
* (at your option) any later version.
*
* GnuPG 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
* SPDX-License-Identifier: GPL-3.0+
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "gpg.h"
#include "../common/status.h"
#include "../common/iobuf.h"
#include "../common/util.h"
#include "filter.h"
#include "packet.h"
#include "options.h"
#include "main.h"
/*
* This filter is used to encipher data with an AEAD algorithm
*/
int
cipher_filter_aead (void *opaque, int control,
iobuf_t a, byte *buf, size_t *ret_len)
{
cipher_filter_context_t *cfx = opaque;
size_t size = *ret_len;
int rc = 0;
if (control == IOBUFCTRL_UNDERFLOW) /* decrypt */
{
rc = -1; /* not yet used */
}
else if (control == IOBUFCTRL_FLUSH) /* encrypt */
{
log_assert (a);
rc = GPG_ERR_NOT_IMPLEMENTED;
}
else if (control == IOBUFCTRL_FREE)
{
gcry_cipher_close (cfx->cipher_hd);
}
else if (control == IOBUFCTRL_DESC)
{
mem2str (buf, "cipher_filter_aead", *ret_len);
}
return rc;
}