RSAblindingon(3) OpenSSL RSAblindingon(3)

NAME
       RSAblindingon, RSAblindingoff - protect the RSA operation from
       timing attacks

SYNOPSIS
        #include 

        int RSAblindingon(RSA *rsa, BNCTX *ctx);

        void RSAblindingoff(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.

       RSAblindingon() turns blinding on for key rrssaa and generates a random
       blinding factor. ccttxx is NNUULLLL or a pre-allocated and initialized BBNNCCTTXX.
       The random number generator must be seeded prior to calling
       RSAblindingon().

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

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

       RSAblindingoff() returns no value.

SEE ALSO
       rsa(3), rand(3)

HISTORY       RSAblindingon() and RSAblindingoff() appeared in SSLeay 0.9.0.



0.9.7l                            2000-02-24                RSAblindingon(3)