Unify X.509v3 extension methods

Use C99 initializers for all structs (some were forgotten).
Make all the structs static, call them x509v3_ext_* matching NID_*.
Add accessors called x509v3_ext_method_* and use these to implement
X509V3_EXT_get_nid().

This adds consistency and avoids a few contortions like grouping
a few extensions in arrays to save a couple externs.

ok beck jsing

1 files changed, 8 insertions, 2 deletions

diff --git a/src/lib/libcrypto/x509/x509_bcons.c b/src/lib/libcrypto/x509/x509_bcons.c
index 7ad65231ec..e44ff4d1cb 100644
--- a/src/lib/libcrypto/x509/x509_bcons.c
+++ b/src/lib/libcrypto/x509/x509_bcons.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: x509_bcons.c,v 1.4 2024/07/08 14:47:44 beck Exp $ */
+/* $OpenBSD: x509_bcons.c,v 1.5 2024/07/13 15:08:58 tb Exp $ */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 1999.
  */
@@ -70,7 +70,7 @@ static STACK_OF(CONF_VALUE) *i2v_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method,
 static BASIC_CONSTRAINTS *v2i_BASIC_CONSTRAINTS(X509V3_EXT_METHOD *method,
     X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values);
 
-const X509V3_EXT_METHOD v3_bcons = {
+static const X509V3_EXT_METHOD x509v3_ext_basic_constraints = {
         .ext_nid = NID_basic_constraints,
         .ext_flags = 0,
         .it = &BASIC_CONSTRAINTS_it,
@@ -87,6 +87,12 @@ const X509V3_EXT_METHOD v3_bcons = {
         .usr_data = NULL,
 };
 
+const X509V3_EXT_METHOD *
+x509v3_ext_method_basic_constraints(void)
+{
+        return &x509v3_ext_basic_constraints;
+}
+
 static const ASN1_TEMPLATE BASIC_CONSTRAINTS_seq_tt[] = {
         {
                 .flags = ASN1_TFLG_OPTIONAL,