4746f25ac6
[skip ci] Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/7829)
44 lines
1.2 KiB
Text
44 lines
1.2 KiB
Text
=pod
|
|
|
|
=head1 NAME
|
|
|
|
RSA_blinding_on, RSA_blinding_off - protect the RSA operation from timing attacks
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/rsa.h>
|
|
|
|
int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
|
|
|
|
void RSA_blinding_off(RSA *rsa);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
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() turns blinding on for key B<rsa> and generates a
|
|
random blinding factor. B<ctx> is B<NULL> or a pre-allocated and
|
|
initialized B<BN_CTX>. The random number generator must be seeded
|
|
prior to calling RSA_blinding_on().
|
|
|
|
RSA_blinding_off() turns blinding off and frees the memory used for
|
|
the blinding factor.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
RSA_blinding_on() returns 1 on success, and 0 if an error occurred.
|
|
|
|
RSA_blinding_off() returns no value.
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2000-2016 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
|
|
L<https://www.openssl.org/source/license.html>.
|
|
|
|
=cut
|