NSS Secret (symmetric) Key Import

I am trying to figure out how to import a symmetric key into NSS for use with encryption at the core crypto boundary. These functions are described https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Reference/NSS_cryptographic_module/FIPS_mode_of_operation I have been able to do every other type of crypto operation by following the documentation because it mirrors PKCS 11 described here: http://docs.oasis-open.org/pkcs11/pkcs11-base/v2.40/cos01/pkcs11-base-v2.40-cos01.html However attempting to import any template where the CK_OBJECT_CLASS" is "CKO_SECRET_KEY" always returns "CKR_ATTRIBUTE_VALUE_INVALID 0x00000013". But I have no problem with assymetric (public/private)

CK_RV crv;
CK_FUNCTION_LIST_PTR pFunctionList;
CK_OBJECT_CLASS keyClass = CKO_SECRET_KEY;
CK_ATTRIBUTE keyTemplate[] = {
  {CKA_CLASS, &keyClass, sizeof(keyClass)}
};
crv = pFunctionList->C_CreateObject(hRwSession, keyTemplate, 1, &hKey);
printf("failed with 0x%08X\n", crv);

But according to the documentation this should be returning "CKR_TEMPLATE_INCOMPLETE" as "CKO_SECRET_KEY" is a valid object class.

Again I have had no trouble with assymetric. I should Also point out that my function pointers is for FIPS mode only. Any insight is greatly appreciated!

It looks like the code you pasted is either incomplete or simply wrong. In particular, there's no concrete value for the key you're creating in the template (CKA_VALUE), which can easily cause the error you're getting from C_CreateObject.