RSA_public_decrypt(), and RSA_private_encrypt()

[HelenH Zhang]

Dear experts:

We want to be able to specify padding. 
RSA_PKCS1_PADDING or RSA_NO_PADDING.

I would like to use EVP API instead of RSA_Public_decrypt(), and 
RSA_Private_encrypt().
Which API should I use?

I am currently using EVP_SignInit()/Update/Final() to do rsa sign, and 
EVP_VerifyInit/Update/Final to do rsa verify.

Thanks in advance for any suggestion.

Helen