RSA_PKCS1_NO_IMPLICIT_REJECT_PADDING
padding = RSA_PKCS1_NO_IMPLICIT_REJECT_PADDING;
case RSA_PKCS1_NO_IMPLICIT_REJECT_PADDING:
pad_mode = RSA_PKCS1_NO_IMPLICIT_REJECT_PADDING;
pad_mode = RSA_PKCS1_NO_IMPLICIT_REJECT_PADDING;