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gpg2/gnupg-gpg-Allow-the-use-of-an-ADSK-subkey-as-ADSK-subkey.patch

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From d30e345692440b9c6677118c1d20b9d17d80f873 Mon Sep 17 00:00:00 2001
From: Werner Koch <wk@gnupg.org>
Date: Thu, 31 Oct 2024 15:11:55 +0100
Subject: [PATCH GnuPG] gpg: Allow the use of an ADSK subkey as ADSK subkey.
* g10/packet.h (PKT_public_key): Increased size of req_usage to 16.
* g10/getkey.c (key_byname): Set allow_adsk in the context if ir was
requested via req_usage.
(finish_lookup): Allow RENC usage matching.
* g10/keyedit.c (append_adsk_to_key): Adjust the assert.
* g10/keygen.c (prepare_adsk): Also allow to find an RENC subkey.
--
If an ADSK is to be added it may happen that an ADSK subkey is found
first and this should then be used even that it does not have the E
usage. However, it used to have that E usage when it was added.
While testing this I found another pecularity: If you do
gpg -k ADSK_SUBKEY_FPR
without the '!' suffix and no corresponding encryption subkey is dound,
you will get an unusabe key error. I hesitate to fix that due to
possible side-effects.
GnuPG-bug-id: 6882
Signed-off-by: Lucas Mulling <lucas.mulling@suse.com>
---
g10/packet.h | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/g10/packet.h b/g10/packet.h
index 5cef17543..375392807 100644
--- a/g10/packet.h
+++ b/g10/packet.h
@@ -400,11 +400,10 @@ typedef struct
when serializing. (Serialized.) */
byte version;
byte selfsigversion; /* highest version of all of the self-sigs */
- /* The public key algorithm. (Serialized.) */
- byte pubkey_algo;
- u16 pubkey_usage; /* carries the usage info. */
- byte req_usage; /* hack to pass a request to getkey() */
byte fprlen; /* 0 or length of FPR. */
+ byte pubkey_algo; /* The public key algorithm. (PGP format) */
+ u16 pubkey_usage; /* carries the usage info. */
+ u16 req_usage; /* hack to pass a request to getkey() */
u32 has_expired; /* set to the expiration date if expired */
/* keyid of the primary key. Never access this value directly.
Instead, use pk_main_keyid(). */
--
2.50.0