can anyone please help me with this, i have been instructed to write an application that takes some DATA then Encrypts it with a RSA Public Key and apparently needs to be RS
You may be interested in trying out forge (it does RSA and more). There are lots of examples on the README:
https://github.com/digitalbazaar/forge
Never mind found the answer myself!
RSA Encryption standard uses PKCS #1
Best library to use is pidCrypt, nothing else worked for me!
https://sourceforge.net/projects/pidcrypt/
the idiots on the other end failed to let me know that that RSA Public Key was meant to be base64 decoded too before encrypting the DATA before sending.