Drop the unused BN_BLINDING argument of BN_BLINDING_create_param()

Author: tb

src/lib/libcrypto/bn/bn_blind.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: bn_blind.c,v 1.35 2023/08/08 15:10:34 tb Exp $ */
+/* $OpenBSD: bn_blind.c,v 1.36 2023/08/08 15:18:24 tb Exp $ */
 /* ====================================================================
  * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
  *
@@ -291,15 +291,13 @@ BN_BLINDING_thread_id(BN_BLINDING *b)
 }
 
 BN_BLINDING *
-BN_BLINDING_create_param(BN_BLINDING *b, const BIGNUM *e, BIGNUM *m, BN_CTX *ctx,
+BN_BLINDING_create_param(const BIGNUM *e, BIGNUM *m, BN_CTX *ctx,
     int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
 	const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx), BN_MONT_CTX *m_ctx)
 {
 	BN_BLINDING *ret = NULL;
 
-	if ((ret = b) == NULL)
-		ret = BN_BLINDING_new(e, m);
-	if (ret == NULL)
+	if ((ret = BN_BLINDING_new(e, m)) == NULL)
 		goto err;
 
 	if (bn_mod_exp != NULL)
@@ -313,8 +311,7 @@ BN_BLINDING_create_param(BN_BLINDING *b, const BIGNUM *e, BIGNUM *m, BN_CTX *ctx
 	return ret;
 
  err:
-	if (ret != b)
-		BN_BLINDING_free(ret);
+	BN_BLINDING_free(ret);
 
 	return NULL;
 }

src/lib/libcrypto/bn/bn_local.h

@@ -1,4 +1,4 @@
-/* $OpenBSD: bn_local.h,v 1.33 2023/08/03 18:53:55 tb Exp $ */
+/* $OpenBSD: bn_local.h,v 1.34 2023/08/08 15:18:24 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -297,8 +297,7 @@ int BN_BLINDING_convert(BIGNUM *n, BIGNUM *r, BN_BLINDING *b, BN_CTX *);
 int BN_BLINDING_invert(BIGNUM *n, const BIGNUM *r, BN_BLINDING *b, BN_CTX *);
 
 CRYPTO_THREADID *BN_BLINDING_thread_id(BN_BLINDING *);
-BN_BLINDING *BN_BLINDING_create_param(BN_BLINDING *b,
-    const BIGNUM *e, BIGNUM *m, BN_CTX *ctx,
+BN_BLINDING *BN_BLINDING_create_param(const BIGNUM *e, BIGNUM *m, BN_CTX *ctx,
     int (*bn_mod_exp)(BIGNUM *r, const BIGNUM *a, const BIGNUM *p,
     const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx),
     BN_MONT_CTX *m_ctx);

src/lib/libcrypto/rsa/rsa_crpt.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: rsa_crpt.c,v 1.24 2023/08/08 13:49:45 tb Exp $ */
+/* $OpenBSD: rsa_crpt.c,v 1.25 2023/08/08 15:18:24 tb Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -209,13 +209,14 @@ RSA_setup_blinding(RSA *rsa, BN_CTX *in_ctx)
 	BN_init(&n);
 	BN_with_flags(&n, rsa->n, BN_FLG_CONSTTIME);
 
-	if ((ret = BN_BLINDING_create_param(NULL, e, &n, ctx,
-	    rsa->meth->bn_mod_exp, rsa->_method_mod_n)) == NULL) {
+	if ((ret = BN_BLINDING_create_param(e, &n, ctx, rsa->meth->bn_mod_exp,
+	    rsa->_method_mod_n)) == NULL) {
 		RSAerror(ERR_R_BN_LIB);
 		goto err;
 	}
 	CRYPTO_THREADID_current(BN_BLINDING_thread_id(ret));
-err:
+
+ err:
 	BN_CTX_end(ctx);
 	if (ctx != in_ctx)
 		BN_CTX_free(ctx);