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<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>RSA_blinding_on</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </head> <body> <ul id="index"> <li><a href="#NAME">NAME</a></li> <li><a href="#SYNOPSIS">SYNOPSIS</a></li> <li><a href="#DESCRIPTION">DESCRIPTION</a></li> <li><a href="#RETURN-VALUES">RETURN VALUES</a></li> <li><a href="#COPYRIGHT">COPYRIGHT</a></li> </ul> <h1 id="NAME">NAME</h1> <p>RSA_blinding_on, RSA_blinding_off - protect the RSA operation from timing attacks</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code> #include <openssl/rsa.h> int RSA_blinding_on(RSA *rsa, BN_CTX *ctx); void RSA_blinding_off(RSA *rsa);</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>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.</p> <p>RSA_blinding_on() turns blinding on for key <b>rsa</b> and generates a random blinding factor. <b>ctx</b> is <b>NULL</b> or a preallocated and initialized <b>BN_CTX</b>.</p> <p>RSA_blinding_off() turns blinding off and frees the memory used for the blinding factor.</p> <h1 id="RETURN-VALUES">RETURN VALUES</h1> <p>RSA_blinding_on() returns 1 on success, and 0 if an error occurred.</p> <p>RSA_blinding_off() returns no value.</p> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.</p> <p>Licensed under the OpenSSL license (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 <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p> </body> </html>
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