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, 3 insertions, 3 deletions

diff --git a/src/lib/libcrypto/ec/ecx_methods.c b/src/lib/libcrypto/ec/ecx_methods.c
index 75988d99ad..cd512a447f 100644
--- a/src/lib/libcrypto/ec/ecx_methods.c
+++ b/src/lib/libcrypto/ec/ecx_methods.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: ecx_methods.c,v 1.10 2023/11/09 11:39:13 tb Exp $ */
+/*      $OpenBSD: ecx_methods.c,v 1.11 2024/01/04 17:01:26 tb Exp $ */
 /*
  * Copyright (c) 2022 Joel Sing <jsing@openbsd.org>
  *
@@ -813,8 +813,8 @@ pkey_ecx_ed_ctrl(EVP_PKEY_CTX *pkey_ctx, int op, int arg1, void *arg2)
 }
 
 const EVP_PKEY_ASN1_METHOD x25519_asn1_meth = {
+        .base_method = &x25519_asn1_meth,
         .pkey_id = EVP_PKEY_X25519,
-        .pkey_base_id = EVP_PKEY_X25519,
         .pkey_flags = 0,
         .pem_str = "X25519",
         .info = "OpenSSL X25519 algorithm",
@@ -851,8 +851,8 @@ const EVP_PKEY_METHOD x25519_pkey_meth = {
 };
 
 const EVP_PKEY_ASN1_METHOD ed25519_asn1_meth = {
+        .base_method = &ed25519_asn1_meth,
         .pkey_id = EVP_PKEY_ED25519,
-        .pkey_base_id = EVP_PKEY_ED25519,
         .pkey_flags = 0,
         .pem_str = "ED25519",
         .info = "OpenSSL ED25519 algorithm",