Hi this is the same question, that was asked two years ago: Java/JCE: Decrypting “long” message encrypted with RSA

I had a large byte array and rsa keypair, initiated by value 1024. Using rsa encryption and the specified size of the key is strong requirement, I can't change it. So I can't use symmetric encryption with asymetric encryption symmetric key. I can't use any other keys. I had a byte array and need ciphered byte array to be returned. I wonder if there is any ready tool, that can manage with this problem?

Sorry for such an amateurish question, but I really need a help.