soft_rsa_decrypt
rv = soft_rsa_decrypt(key, pEncrypted, modulus_len, plain_data);
rv = soft_rsa_decrypt(key, plain_data, modulus_len, signed_data);
CK_RV soft_rsa_decrypt(soft_object_t *, CK_BYTE_PTR, uint32_t, CK_BYTE_PTR);