gpg: Make Kyber creation more flexible.

* common/openpgp-oid.c (openpgp_is_curve_supported): Allow the
abbreviated curve name.
* g10/pkglue.c (pk_encrypt): Add debug output.
* g10/seskey.c (encode_session_key): Handle Kyber session key like
ECDH.  This is just a stub.
* g10/keygen.c (ecckey_from_sexp): Use the modern OID for cv25519.
(parse_key_parameter_part): Allow more Kyber variants.
--

Test by creating an ed25519 key and using

 gpg --quick-add-key --batch --passphrase ""  <fingerprint> <algo>

to create several subkeys.  Tested with ALGOs:

  kyber768
  kyber1024
  ky768_cv25519
  ky768_bp256
  kyber768_nistp256
  ky1024_cv448

All curves capable of encryption should work.

GnuPG-bug-id: 6815

1 files changed, 5 insertions, 0 deletions

diff --git a/g10/pkglue.c b/g10/pkglue.c
index f18313913..037e97a14 100644
--- a/g10/pkglue.c
+++ b/g10/pkglue.c
@@ -480,6 +480,11 @@ pk_encrypt (pubkey_algo_t algo, gcry_mpi_t *resarr, gcry_mpi_t data,
           gcry_mpi_release (k);
         }
     }
+  else if (algo == PUBKEY_ALGO_KYBER)
+    {
+      log_debug ("Implement Kyber encryption\n");
+      rc = gpg_error (GPG_ERR_NOT_IMPLEMENTED);
+    }
   else
     rc = gpg_error (GPG_ERR_PUBKEY_ALGO);