Garbage collect .group_finish()

There is only one caller, EC_GROUP_free(), so inline the relevant free
calls there and dispose of a few layers of indirection.

ok jsing

3 files changed, 9 insertions, 23 deletions

diff --git a/src/lib/libcrypto/ec/ec_lib.c b/src/lib/libcrypto/ec/ec_lib.c
index aeb627dfba..89d26e1177 100644
--- a/src/lib/libcrypto/ec/ec_lib.c
+++ b/src/lib/libcrypto/ec/ec_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ec_lib.c,v 1.92 2025/01/01 09:57:02 tb Exp $ */
+/* $OpenBSD: ec_lib.c,v 1.93 2025/01/01 10:01:31 tb Exp $ */
 /*
  * Originally written by Bodo Moeller for the OpenSSL project.
  */
@@ -109,8 +109,12 @@ EC_GROUP_free(EC_GROUP *group)
         if (group == NULL)
                 return;
 
-        if (group->meth->group_finish != NULL)
-                group->meth->group_finish(group);
+        BN_free(&group->p);
+        BN_free(&group->a);
+        BN_free(&group->b);
+
+        BN_MONT_CTX_free(group->mont_ctx);
+        BN_free(group->mont_one);
 
         EC_POINT_free(group->generator);
         BN_free(&group->order);
diff --git a/src/lib/libcrypto/ec/ec_local.h b/src/lib/libcrypto/ec/ec_local.h
index bce3f31d4d..cc918b38fd 100644
--- a/src/lib/libcrypto/ec/ec_local.h
+++ b/src/lib/libcrypto/ec/ec_local.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: ec_local.h,v 1.44 2025/01/01 09:57:02 tb Exp $ */
+/* $OpenBSD: ec_local.h,v 1.45 2025/01/01 10:01:31 tb Exp $ */
 /*
  * Originally written by Bodo Moeller for the OpenSSL project.
  */
@@ -88,7 +88,6 @@ __BEGIN_HIDDEN_DECLS
 struct ec_method_st {
         int field_type;
 
-        void (*group_finish)(EC_GROUP *);
         int (*group_copy)(EC_GROUP *, const EC_GROUP *);
 
         int (*group_set_curve)(EC_GROUP *, const BIGNUM *p, const BIGNUM *a,
diff --git a/src/lib/libcrypto/ec/ecp_methods.c b/src/lib/libcrypto/ec/ecp_methods.c
index 333922d351..af19addab4 100644
--- a/src/lib/libcrypto/ec/ecp_methods.c
+++ b/src/lib/libcrypto/ec/ecp_methods.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ecp_methods.c,v 1.16 2025/01/01 09:57:02 tb Exp $ */
+/* $OpenBSD: ecp_methods.c,v 1.17 2025/01/01 10:01:31 tb Exp $ */
 /* Includes code written by Lenka Fibikova <fibikova@exp-math.uni-essen.de>
  * for the OpenSSL project.
  * Includes code written by Bodo Moeller for the OpenSSL project.
@@ -84,14 +84,6 @@
  * representation (i.e. 'encoding' means multiplying by some factor R).
  */
 
-static void
-ec_group_finish(EC_GROUP *group)
-{
-        BN_free(&group->p);
-        BN_free(&group->a);
-        BN_free(&group->b);
-}
-
 static int
 ec_group_copy(EC_GROUP *dest, const EC_GROUP *src)
 {
@@ -1526,13 +1518,6 @@ ec_mont_group_clear(EC_GROUP *group)
         group->mont_one = NULL;
 }
 
-static void
-ec_mont_group_finish(EC_GROUP *group)
-{
-        ec_mont_group_clear(group);
-        ec_group_finish(group);
-}
-
 static int
 ec_mont_group_copy(EC_GROUP *dest, const EC_GROUP *src)
 {
@@ -1661,7 +1646,6 @@ ec_mont_field_set_to_one(const EC_GROUP *group, BIGNUM *r, BN_CTX *ctx)
 
 static const EC_METHOD ec_GFp_simple_method = {
         .field_type = NID_X9_62_prime_field,
-        .group_finish = ec_group_finish,
         .group_copy = ec_group_copy,
         .group_set_curve = ec_group_set_curve,
         .group_get_curve = ec_group_get_curve,
@@ -1697,7 +1681,6 @@ LCRYPTO_ALIAS(EC_GFp_simple_method);
 
 static const EC_METHOD ec_GFp_mont_method = {
         .field_type = NID_X9_62_prime_field,
-        .group_finish = ec_mont_group_finish,
         .group_copy = ec_mont_group_copy,
         .group_set_curve = ec_mont_group_set_curve,
         .group_get_curve = ec_group_get_curve,