HRESULT 0x8028008A (TPM_20_E_TYPE): meaning and diagnosis

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Description:

the supplied TPM type selector is not valid for the operation or parameter field.

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TPM_20_E_MODE	TPM_20_E_HANDLE

TPM_20_E_TYPE

TPM 2.0 structures frequently use a selector followed by a union whose active member is determined by that selector. A public object declared as RSA, ECC, keyed hash or symmetric cipher therefore has a different parameter branch and a different set of legal schemes. This error points to a type mismatch at that structural boundary.

Common causes

The type field selects one public-object family while the parameter area was built for another.
A command expects a handle, hierarchy, scheme or algorithm interface type that differs from the supplied value.
Serialization code uses an incorrect union selector or reuses a template after changing only one field.

Practical diagnosis

Dump both the selector and the union branch that was marshaled. Compare the request with the command-specific structure definition rather than converting the error to a generic “unsupported algorithm” message. A correctly supported algorithm can still be rejected when it appears in the wrong typed slot.

TCG: selector and union structure model · tpm2-tss: public template passed to CreatePrimary · tpm2_create: public object types

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