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* common/openpgpdefs.h (PKT_ENCRYPTED_AEAD): New const.
* g10/dek.h (DEK): Increase size of use_aead to 4 bits.
* g10/filter.h (cipher_filter_context_t): Add new fields for AEAD.
* g10/packet.h (PKT_encrypted): Add fields aead_algo, cipher_algo, and
chunkbyte.
* g10/build-packet.c (do_encrypted_aead): New.
(build_packet): Call it.
* g10/parse-packet.c (dump_sig_subpkt): Handle SIGSUBPKT_PREF_AEAD.
(parse_one_sig_subpkt, can_handle_critical): Ditto.
(parse_encrypted): Clear new PKT_ENCRYPTED fields.
(parse_encrypted_aead): New.
(parse): Call it.
* g10/gpg.c (main): Take care of --rfc4880bis option when checking
compliance.
* g10/cipher-aead.c: Replace the stub by real code.
* g10/decrypt-data.c (decode_filter_ctx_t): Add fields for use with
AEAD.
(aead_set_nonce): New.
(aead_set_ad): New.
(decrypt_data): Support AEAD.
(aead_underflow): New.
(aead_decode_filter): New.
* g10/encrypt.c (use_aead): Make that new fucntion work.
(encrypt_simple): Use default_aead_algo() instead of EAX.
* g10/mainproc.c (proc_encrypted): Support AEAD.
(do_proc_packets): Support PKT_ENCRYPTED_AEAD.
--
This code has seen only a very few manual tests. Encrypting always
uses a 64k chunks and decryption has not been tested with larger
chunks. Those small chunks make debugging much faster.
Tests can be done using:
gpg --rfc4880bis --pinentry-mode=loopback --passphrase abc \
--force-aead --aead-algo ocb --s2k-mode 0 --cipher AES \
-v -z 0 --status-fd 2 -c <INFILE >OUTFILE
and
gpg --rfc4880bis --pinentry-mode=loopback --passphrase=abc \
--status-fd 2 -v -d <INFILE >OUTFILE
Signed-off-by: Werner Koch <wk@gnupg.org>
53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
/* dek.h - The data encryption key structure.
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* Copyright (C) 2014, 2017 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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*/
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#ifndef G10_DEK_H
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#define G10_DEK_H
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typedef struct
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{
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/* The algorithm (e.g., CIPHER_ALGO_AES). */
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int algo;
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/* The length of the key (in bytes). */
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int keylen;
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/* Whether we've already printed information about this key. This
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* is currently only used in decrypt_data() and only if we are in
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* verbose mode. */
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int algo_info_printed : 1;
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/* AEAD shall be used. The value is the AEAD algo. */
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int use_aead : 4;
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/* MDC shall be used. */
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int use_mdc : 1;
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/* This key was read from a SK-ESK packet (see proc_symkey_enc). */
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int symmetric : 1;
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/* This is the largest used keylen (256 bit). */
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byte key[32];
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/* The cacheid for the S2K. */
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char s2k_cacheid[1+16+1];
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} DEK;
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#endif /*G10_DEK_H*/
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