HRESULT 0x80280152 (TPM_20_E_PARENT): meaning and diagnosis

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Description:

The supplied parent handle cannot be used as the parent for this TPM object.

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TPM_20_E_CPHASH	TPM_20_E_NEEDS_TEST

TPM_20_E_PARENT

TPM_20_E_PARENT maps to TPM_RC_PARENT. The supplied handle does not represent a valid parent for the requested object operation. This is more specific than a malformed handle: the handle can exist but lack the required parent role, type, or usable attributes.

What to inspect

Read the candidate parent public area and verify that its object type and attributes support the intended child operation.
Check that the parent belongs to the expected hierarchy and is loaded in the same TPM context as the child data.
For import or load workflows, keep the parent public data paired with the wrapped private data that was prepared for it.

TCG TPM 2.0 Part 2: TPM_RC_PARENT · tpm2_import parent-object requirements

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