bn_mod_exp: we have a BN_CTX available...

Use BN_CTX_get() instead of BN_new()/BN_free().

diff --git a/regress/lib/libcrypto/bn/bn_mod_exp.c b/regress/lib/libcrypto/bn/bn_mod_exp.c
index d12d9f1..591d603 100644 (file)
--- a/regress/lib/libcrypto/bn/bn_mod_exp.c
+++ b/regress/lib/libcrypto/bn/bn_mod_exp.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: bn_mod_exp.c,v 1.3 2022/12/02 17:42:45 tb Exp $       */
+/*     $OpenBSD: bn_mod_exp.c,v 1.4 2022/12/02 18:24:01 tb Exp $       */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -82,23 +82,26 @@ main(int argc, char *argv[])
 
        if ((ctx = BN_CTX_new()) == NULL)
                goto err;
-       if ((r_mont = BN_new()) == NULL)
+
+       BN_CTX_start(ctx);
+
+       if ((r_mont = BN_CTX_get(ctx)) == NULL)
                goto err;
-       if ((r_mont_const = BN_new()) == NULL)
+       if ((r_mont_const = BN_CTX_get(ctx)) == NULL)
                goto err;
-       if ((r_mont_ct = BN_new()) == NULL)
+       if ((r_mont_ct = BN_CTX_get(ctx)) == NULL)
                goto err;
-       if ((r_mont_nonct = BN_new()) == NULL)
+       if ((r_mont_nonct = BN_CTX_get(ctx)) == NULL)
                goto err;
-       if ((r_recp = BN_new()) == NULL)
+       if ((r_recp = BN_CTX_get(ctx)) == NULL)
                goto err;
-       if ((r_simple = BN_new()) == NULL)
+       if ((r_simple = BN_CTX_get(ctx)) == NULL)
                goto err;
-       if ((a = BN_new()) == NULL)
+       if ((a = BN_CTX_get(ctx)) == NULL)
                goto err;
-       if ((b = BN_new()) == NULL)
+       if ((b = BN_CTX_get(ctx)) == NULL)
                goto err;
-       if ((m = BN_new()) == NULL)
+       if ((m = BN_CTX_get(ctx)) == NULL)
                goto err;
 
        if ((out = BIO_new(BIO_s_file())) == NULL)
@@ -194,15 +197,8 @@ main(int argc, char *argv[])
                        exit(1);
                }
        }
-       BN_free(r_mont);
-       BN_free(r_mont_const);
-       BN_free(r_mont_ct);
-       BN_free(r_mont_nonct);
-       BN_free(r_recp);
-       BN_free(r_simple);
-       BN_free(a);
-       BN_free(b);
-       BN_free(m);
+
+       BN_CTX_end(ctx);
        BN_CTX_free(ctx);
        ERR_remove_thread_state(NULL);
        CRYPTO_mem_leaks(out);