Replace .pkey_base_id with a .base_method pointer

Every EVP_PKEY_ASN1_METHOD is either an ASN.1 method or an alias.
As such it resolves to an underlying ASN.1 method (in one step).
This information can be stored in a base_method pointer in allusion
to the pkey_base_id, which is the name for the nid (aka pkey_id aka
type) of the underlying method.

For an ASN.1 method, the base method is itself, so the base method
is set as a pointer to itself. For an alias it is of course a pointer
to the underlying method. Then obviously ameth->pkey_base_id is the
same as ameth->base_method->pkey_id, so rework all ASN.1 methods to
follow that.

ok jsing

1 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/libcrypto/cmac/cm_ameth.c b/src/lib/libcrypto/cmac/cm_ameth.c
index 04e0eb836f..50db61756c 100644
--- a/src/lib/libcrypto/cmac/cm_ameth.c
+++ b/src/lib/libcrypto/cmac/cm_ameth.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cm_ameth.c,v 1.10 2022/11/26 16:08:51 tb Exp $ */
+/* $OpenBSD: cm_ameth.c,v 1.11 2024/01/04 17:01:26 tb Exp $ */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 2010.
  */
@@ -77,8 +77,8 @@ cmac_key_free(EVP_PKEY *pkey)
 }
 
 const EVP_PKEY_ASN1_METHOD cmac_asn1_meth = {
+        .base_method = &cmac_asn1_meth,
         .pkey_id = EVP_PKEY_CMAC,
-        .pkey_base_id = EVP_PKEY_CMAC,
 
         .pem_str = "CMAC",
         .info = "OpenSSL CMAC method",