RSA_check_key(3) - NetBSD Manual Pages

RSA_check_key(3)             OpenSSL             RSA_check_key(3)



NAME

       RSA_check_key - validate private RSA keys


LIBRARY

       libcrypto, -lcrypto


SYNOPSIS

        #include <openssl/rsa.h>

        int RSA_check_key(RSA *rsa);



DESCRIPTION

       This function validates RSA keys. It checks that p and q
       are in fact prime, and that n = p*q.

       It also checks that d*e = 1 mod (p-1*q-1), and that dmp1,
       dmq1 and iqmp are set correctly or are NULL.

       As such, this function can not be used with any arbitrary
       RSA key object, even if it is otherwise fit for regular
       RSA operation. See NOTES for more information.


RETURN VALUE

       RSA_check_key() returns 1 if rsa is a valid RSA key, and 0
       otherwise.  -1 is returned if an error occurs while check-
       ing the key.

       If the key is invalid or an error occurred, the reason
       code can be obtained using ERR_get_error(3).


NOTES

       This function does not work on RSA public keys that have
       only the modulus and public exponent elements populated.
       It performs integrity checks on all the RSA key material,
       so the RSA key structure must contain all the private key
       data too.


SEE ALSO

       openssl_rsa(3), openssl_err(3)


HISTORY

       RSA_check() appeared in OpenSSL 0.9.4.














2002-07-31                    0.9.6g                            1