RSA_BLINDING_ON(3)         Library Functions Manual         RSA_BLINDING_ON(3)

NAME
     RSA_blinding_on, RSA_blinding_off - protect the RSA operation from timing
     attacks

SYNOPSIS
     #include <openssl/rsa.h>

     int
     RSA_blinding_on(RSA *rsa, BN_CTX *ctx);

     void
     RSA_blinding_off(RSA *rsa);

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 rsa and generates a random
     blinding factor.  ctx is NULL or a pre-allocated and initialized BN_CTX.

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

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

SEE ALSO
     RSA_new(3)

HISTORY
     RSA_blinding_on() and RSA_blinding_off() first appeared in SSLeay 0.9.0
     and have been available since OpenBSD 2.4.

Linux 6.8.7-arch1-1              July 26, 2023             Linux 6.8.7-arch1-1