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gpg: Try hard to use MDC also for sign+symenc.

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* g10/encrypt.c (use_mdc): Make it a global func.
* g10/sign.c (sign_symencrypt_file): Use that function to decide
whether to use an MDC.
* tests/openpgp/conventional-mdc.test: Add a simple test case.
--

We used --force-mdc in sign+symenc mode (-cs) only with --force-mdc.
That broke our assumption from commit 625e292 (GnuPG 2.1.9) that all
uses of modern ciphers are using MDC.

Reported-by: Ben Kibbey <bjk@luxsci.net>
Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2015-10-12 09:31:44 +02:00
parent b0627ec259
commit 4584125802
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
4 changed files with 19 additions and 10 deletions
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4
g10/encrypt.c
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@ -101,8 +101,8 @@ encrypt_seskey (DEK *dek, DEK **seskey, byte *enckey)
/* We try very hard to use a MDC */
static int
use_mdc(PK_LIST pk_list,int algo)
int
use_mdc (pk_list_t pk_list,int algo)
{
/* RFC-2440 don't has MDC */
if (RFC2440)