Decrypt rsa decrypt.

Encrypt rsa encrypt.

GenerateHexKey generate new rsa hex key pairs.

GenerateKey generate new pairs by using key bits.

GetEN get mod and exp about the public key.

GetPrivateKey gain rsa privateKey from hex key.

GetPublicKey gain rsa publicKey from hex key.

SetEN generate the public key by using mod and exp.

Sign rsa sign.

Verify sign verify.