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gpg: New option --force-aead

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* g10/dek.h (DEK): Turn fields use_mdc, algo_printed and symmetric
into single bit vars.  Make sure they are always set to 1 or 0.
(DEK): New field use_aead.
* g10/options.h (struct opt): New field force_aead.
* g10/pkclist.c (select_aead_from_pklist): New.
* g10/gpg.c (oForceAEAD): New const.
(opts): New options "--force-aead".
(main): Set new option.
* g10/encrypt.c (use_aead): New.
(encrypt_simple): Implement new flags DEK.use_aead.
(encrypt_crypt): Ditto.
(encrypt_filter): Ditto.
* g10/sign.c (sign_symencrypt_file): Ditto.
--

This patch should be enough to detect whether AEAD can be used.
Not tested.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2018-01-10 17:07:11 +01:00
parent 8217cd4936
commit 4e2ba546cd
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GPG key ID: E3FDFF218E45B72B
8 changed files with 120 additions and 20 deletions
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25
g10/pkclist.c
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@ -1651,6 +1651,31 @@ select_mdc_from_pklist (PK_LIST pk_list)
}
/* Select the AEAD flag from the pk_list. We can only use AEAD if all
* recipients support this feature. Returns true if AEAD can be used. */
int
select_aead_from_pklist (PK_LIST pk_list)
{
pk_list_t pkr;
int aead;
if (!pk_list)
return 0;
for (pkr = pk_list; pkr; pkr = pkr->next)
{
if (pkr->pk->user_id) /* selected by user ID */
aead = pkr->pk->user_id->flags.aead;
else
aead = pkr->pk->flags.aead;
if (!aead)
return 0; /* At least one recipient does not support it. */
}
return 1; /* Can be used. */
}
/* Print a warning for all keys in PK_LIST missing the MDC feature. */
void
warn_missing_mdc_from_pklist (PK_LIST pk_list)