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Title "RSA_BLINDING_ON 3" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
RSA_blinding_on, RSA_blinding_off - protect the RSA operation from timing attacks Header "SYNOPSIS" .Vb 1 #include <openssl/rsa.h> \& int RSA_blinding_on(RSA *rsa, BN_CTX *ctx); \& void RSA_blinding_off(RSA *rsa); .Ve Header "DESCRIPTION" \s-1RSA\s0 is vulnerable to timing attacks. In a setup where attackers can measure the time of \s-1RSA\s0 decryption or signature operations, blinding must be used to protect the \s-1RSA\s0 operation from that attack.

\fBRSA_blinding_on() turns blinding on for key rsa and generates a random blinding factor. ctx is \s-1NULL\s0 or a preallocated and initialized \s-1BN_CTX\s0.

\fBRSA_blinding_off() turns blinding off and frees the memory used for the blinding factor.

Header "RETURN VALUES" \fBRSA_blinding_on() returns 1 on success, and 0 if an error occurred.

\fBRSA_blinding_off() returns no value.

Header "COPYRIGHT" Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.