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gpg: For decryption, support use of a key with no 'encrypt' usage.

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* g10/pubkey-enc.c (get_session_key): Don't skip at no PUBKEY_USAGE_ENC.
Emit information the key has no 'encrypt' usage.

--

GnuPG-bug-id: 4246
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2020-07-10 10:00:00 +09:00
parent b4501fc826
commit 31ae0718ba
1 changed files with 9 additions and 5 deletions
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14
g10/pubkey-enc.c
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@ -91,9 +91,6 @@ get_session_key (ctrl_t ctrl, struct pubkey_enc_list *list, DEK *dek)
if (err) if (err)
break; break;
if (!(sk->pubkey_usage & PUBKEY_USAGE_ENC))
continue;
/* Check compliance. */ /* Check compliance. */
if (! gnupg_pk_is_allowed (opt.compliance, PK_USE_DECRYPTION, if (! gnupg_pk_is_allowed (opt.compliance, PK_USE_DECRYPTION,
sk->pubkey_algo, 0, sk->pubkey_algo, 0,
@ -144,7 +141,10 @@ get_session_key (ctrl_t ctrl, struct pubkey_enc_list *list, DEK *dek)
} }
else if (opt.try_all_secrets else if (opt.try_all_secrets
|| (k->keyid[0] == keyid[0] && k->keyid[1] == keyid[1])) || (k->keyid[0] == keyid[0] && k->keyid[1] == keyid[1]))
; {
if (!opt.quiet && !(sk->pubkey_usage & PUBKEY_USAGE_ENC))
log_info (_("using the key with no 'encrypt' usage.\n"));
}
else else
continue; continue;
@ -153,7 +153,11 @@ get_session_key (ctrl_t ctrl, struct pubkey_enc_list *list, DEK *dek)
if (!err) if (!err)
{ {
if (!opt.quiet && !k->keyid[0] && !k->keyid[1]) if (!opt.quiet && !k->keyid[0] && !k->keyid[1])
log_info (_("okay, we are the anonymous recipient.\n")); {
log_info (_("okay, we are the anonymous recipient.\n"));
if (!(sk->pubkey_usage & PUBKEY_USAGE_ENC))
log_info (_("using the key with no 'encrypt' usage.\n"));
}
search_for_secret_keys = 0; search_for_secret_keys = 0;
break; break;
} }