Exercise 2

public_encrypt -
	- Read the RSA public key into RSA structure (see PEM_read_RSA_PUBKEY(..) for guidance)
	- encrypt the message (see RSA_public_encrypt)
	- Use RSA_PKCS1_OAEP_PADDING for padding 

private_decrypt -
	- Read the RSA private key into RSA structure (see PEM_read_RSAPrivateKey(..) for guidance)
	- decrypt the message (see RSA_private_decrypt)
	- Use RSA_PKCS1_OAEP_PADDING for padding 

