5 RSA_blinding_on, RSA_blinding_off - Protect the RSA operation from timing attacks
9 #include <openssl/rsa.h>
11 int RSA_blinding_on(RSA *rsa, BN_CTX *ctx);
13 void RSA_blinding_off(RSA *rsa);
17 RSA is vulnerable from timing attacks. In a setup where attackers can
18 measure the time of RSA decryption or signature operations, blinding
19 must be used to protect the RSA operation from that attack.
21 RSA_blinding_on() turns blinding on for key B<rsa> and generates a
22 random blinding factor. B<ctx> is B<NULL> or a pre-allocated and
23 initialized B<BN_CTX>. The random number generator must be seeded
24 prior to calling RSA_blinding_on().
26 RSA_blinding_off() turns blinding off and frees the memory used for
31 RSA_blinding_on() returns 1 on success, and 0 if an error occurred.
33 RSA_blinding_off() returns no value.
41 RSA_blinding_on() and RSA_blinding_off() appeared in SSLeay 0.9.0.