gpg: Add option and preference framework for AEAD.

* common/openpgpdefs.h (aead_algo_t): New.
(SIGSUBPKT_PREF_AEAD): New.
* g10/gpg.c (oAEADAlgo, oPersonalAEADPreferences): New.
(opts): New options --aead-algo and --personal-aead-preferences.
(set_compliance_option): Clar aead algo.
(main): Parse and check the new options
* g10/options.h (struct opt): Add fields def_aead_algo and
personal_aead_prefs.
* g10/packet.h (PREFTYPE_AEAD): New enum value.
(PKT_user_id): Add field flags.aead.
(PKT_public_key): Add field flags.aead.
* g10/pkclist.c (select_algo_from_prefs): Support PREFTYPE_AEAD.
* g10/getkey.c (fixup_uidnode): Set AEAD flag.
(merge_selfsigs): Ditto.
* g10/kbnode.c (dump_kbnode): Show aead flag.
* g10/keyedit.c (show_prefs): Ditto.
(show_key_with_all_names_colon): Ditto.
* g10/keygen.c (aead_presf, n_aead_prefs): New vars.
(set_one_pref): Suppport PREFTYPE_AEAD.
(keygen_set_std_prefs): Parse AEAD preferences.
(keygen_get_std_prefs): Ditto.
(add_feature_aead): New.
(keygen_upd_std_prefs): Call that and build AEAD pref  packet.
* g10/main.h (DEFAULT_AEAD_ALGO): New const.
* g10/misc.c (openpgp_aead_test_algo): New.
(openpgp_aead_algo_name): New.
(string_to_aead_algo): New.
(default_aead_algo): New.
--

This is only used in --rfc4880bis mode and not really tested.

Signed-off-by: Werner Koch <[email protected]>

1 files changed, 5 insertions, 2 deletions

diff --git a/g10/packet.h b/g10/packet.h
index 8dca88b75..894b38946 100644
--- a/g10/packet.h
+++ b/g10/packet.h
@@ -72,7 +72,8 @@ typedef enum {
     PREFTYPE_NONE = 0,
     PREFTYPE_SYM = 1,
     PREFTYPE_HASH = 2,
-    PREFTYPE_ZIP = 3
+    PREFTYPE_ZIP = 3,
+    PREFTYPE_AEAD = 4
 } preftype_t;
 
 typedef struct {
@@ -290,6 +291,7 @@ typedef struct
   struct
   {
     unsigned int mdc:1;
+    unsigned int aead:1;
     unsigned int ks_modify:1;
     unsigned int compacted:1;
     unsigned int primary:2; /* 2 if set via the primary flag, 1 if calculated */
@@ -386,6 +388,7 @@ typedef struct
   struct
   {
     unsigned int mdc:1;           /* MDC feature set.  */
+    unsigned int aead:1;          /* AEAD feature set.  */
     unsigned int disabled_valid:1;/* The next flag is valid.  */
     unsigned int disabled:1;      /* The key has been disabled.  */
     unsigned int primary:1;       /* This is a primary key.  */
@@ -471,7 +474,7 @@ typedef struct {
      Note: this is ignored when encrypting.  */
   byte is_partial;
   /* If 0, MDC is disabled.  Otherwise, the MDC method that was used
-     (currently, only DIGEST_ALGO_SHA1 is supported).  */
+     (only DIGEST_ALGO_SHA1 has ever been defined).  */
   byte mdc_method;
   /* An iobuf holding the data to be decrypted.  (This is not used for
      encryption!)  */