RSA_blinding_on, RSA_blinding_off - protect the RSA operation from timing attacks

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       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>.

3.5.0                                              2025-06-04                              RSA_BLINDING_ON(3SSL)

       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() 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.

       All of these functions were deprecated in OpenSSL 3.0.

       RSA_blinding_on, RSA_blinding_off - protect the RSA operation from timing attacks

RSA_blinding_on() returns 1 on success, and 0 if an error occurred.

       RSA_blinding_off() returns no value.

        #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);