Section: OpenSSL (3)
RSA_blinding_on, RSA_blinding_off - protect the RSA operation from timing attacks
int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
void RSA_blinding_off(RSA *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
RSA_blinding_off() turns blinding off and frees the memory used for
the blinding factor.
returns 1 on success, and 0 if an error occurred.
RSA_blinding_off() returns no value.
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