Verify the data in "buffer" with the RSA public key specified by "rsa" and the signature in "signature" where rsa = Value returned from one of the rsa_load_key routines, buffer = Buffer to sign, signature = Signature.
Syntax
rsa_verify( rsa, buffer, signature )
Returns 1 on success, 0 on verification failure or error. Requires OpenSSL 0.9.7 or greater.
