RSA_blinding_on(3) OpenSSL RSA_blinding_on(3)NAME
RSA_blinding_on, RSA_blinding_off - protect the RSA operation from tim‐
ing 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.
The random number generator must be seeded prior to calling RSA_blind‐
ing_on().
RSA_blinding_off() turns blinding off and frees the memory used for the
blinding factor.
RETURN VALUESRSA_blinding_on() returns 1 on success, and 0 if an error occurred.
RSA_blinding_off() returns no value.
SEE ALSOrsa(3), rand(3)HISTORYRSA_blinding_on() and RSA_blinding_off() appeared in SSLeay 0.9.0.
0.9.8k 2009-05-20 RSA_blinding_on(3)
