RSA_blinding_on(3) - NetBSD Manual Pages

RSA_blinding_on(3)           OpenSSL           RSA_blinding_on(3)



NAME

       RSA_blinding_on, RSA_blinding_off - protect the RSA opera-
       tion from timing attacks


LIBRARY

       libcrypto, -lcrypto


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 gener-
       ates a random blinding factor. ctx is NULL or a pre-allo-
       cated and initialized BN_CTX. The random number generator
       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 VALUES

       RSA_blinding_on() returns 1 on success, and 0 if an error
       occurred.

       RSA_blinding_off() returns no value.


SEE ALSO

       openssl_rsa(3), openssl_rand(3)


HISTORY

       RSA_blinding_on() and RSA_blinding_off() appeared in
       SSLeay 0.9.0.
















2000-07-22                    0.9.6g                            1