RSA_BLINDING_ON(3) OpenSSL RSA_BLINDING_ON(3)NAME
RSA_blinding_on, RSA_blinding_off - protect the RSA opera-
tion 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 signa-
ture operations, blinding must be used to protect the RSA
operation from that attack.
RSA_blinding_on() turns blinding on for key rsa and gen-
erates a random blinding factor. ctx is NULL or a pre-
allocated and initialized BN_CTX. The random number genera-
tor must be seeded prior to calling RSA_blinding_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.
MirOS BSD #10-current 2005-02-05 1