mirror of git://git.gnupg.org/gnupg.git
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
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/* cipher-aead.c - Enciphering filter for AEAD modes
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* Copyright (C) 2018 Werner koch
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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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* SPDX-License-Identifier: GPL-3.0+
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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 "gpg.h"
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#include "../common/status.h"
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#include "../common/iobuf.h"
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#include "../common/util.h"
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#include "filter.h"
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#include "packet.h"
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#include "options.h"
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#include "main.h"
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/*
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* This filter is used to encipher data with an AEAD algorithm
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*/
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int
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cipher_filter_aead (void *opaque, int control,
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iobuf_t a, byte *buf, size_t *ret_len)
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{
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cipher_filter_context_t *cfx = opaque;
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size_t size = *ret_len;
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int rc = 0;
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if (control == IOBUFCTRL_UNDERFLOW) /* decrypt */
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{
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rc = -1; /* not yet used */
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}
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else if (control == IOBUFCTRL_FLUSH) /* encrypt */
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{
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log_assert (a);
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rc = GPG_ERR_NOT_IMPLEMENTED;
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}
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else if (control == IOBUFCTRL_FREE)
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{
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gcry_cipher_close (cfx->cipher_hd);
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}
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else if (control == IOBUFCTRL_DESC)
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{
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mem2str (buf, "cipher_filter_aead", *ret_len);
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}
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return rc;
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}
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