bn_test: use bn_copy() instead of BN_free/BN_dup

This is not only simpler but also required by an upcoming change.

diff --git a/regress/lib/libcrypto/bn/bn_test.c b/regress/lib/libcrypto/bn/bn_test.c
index 57068a1..a5fe58f 100644 (file)
--- a/regress/lib/libcrypto/bn/bn_test.c
+++ b/regress/lib/libcrypto/bn/bn_test.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: bn_test.c,v 1.7 2023/04/07 22:23:31 tb Exp $  */
+/*     $OpenBSD: bn_test.c,v 1.8 2023/04/07 22:25:09 tb Exp $  */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -1410,8 +1410,7 @@ test_mod_exp_mont5(BIO *bp, BN_CTX *ctx)
            "0000000000000000000000000000000000000000000000000000000000000000"
            "000000000000000000000000000000000000000000FFFFFFFFFFFFFF00000000");
        CHECK_GOTO(len);
-       BN_free(b);
-       CHECK_GOTO(b = BN_dup(a));
+       CHECK_GOTO(bn_copy(b, a));
        CHECK_GOTO(BN_MONT_CTX_set(mont, n, ctx));
        CHECK_GOTO(BN_mod_mul_montgomery(c, a, a, mont, ctx));
        CHECK_GOTO(BN_mod_mul_montgomery(d, a, b, mont, ctx));