RSA_BLINDING_ON(3ossl) OpenSSL RSA_BLINDING_ON(3ossl)
NAME
RSA_blinding_on, RSA_blinding_off - protect the RSA operation from
timing attacks
SYNOPSIS
#include <openssl/rsa.h>
The following functions have been deprecated since OpenSSL 3.0, and can
be hidden entirely by defining OPENSSL_API_COMPAT with a suitable
version value, see openssl_user_macros(7):
int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
void RSA_blinding_off(RSA *rsa);
DESCRIPTION
All of the functions described on this page are deprecated.
RSA is vulnerable to timing attacks. In a setup where attackers can
measure the time of RSA decryption or signature operations, blinding
must be used to protect the RSA operation from that attack.
RSA_blinding_on(3) turns blinding on for key rsa and generates a random
blinding factor. ctx is NULL or a preallocated and initialized BN_CTX.
RSA_blinding_off() turns blinding off and frees the memory used for the
blinding factor.
RETURN VALUES
RSA_blinding_on(3) returns 1 on success, and 0 if an error occurred.
RSA_blinding_off() returns no value.
HISTORY
All of these functions were deprecated in OpenSSL 3.0.
COPYRIGHT
Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.
3.3.2 2024-09-04 RSA_BLINDING_ON(3ossl)
openssl 3.3.2 - Generated Thu Sep 19 18:31:39 CDT 2024