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TPMAPI_E_INVALID_KEY_BLOB
TPMAPI_E_INVALID_KEY_BLOB is a Windows TPM API result. It indicates that supplied key data is malformed, incompatible with the current TPM, or invalid for the requested key operation.
What to check for TPMAPI_E_INVALID_KEY_BLOB
- Verify blob integrity, origin, TPM compatibility, and serialization format.
- Check whether the key was created under a different TPM, owner state, or policy configuration.
- Recreate or reimport the key from its trusted source rather than accepting a damaged blob.
Microsoft documentation for TPMAPI error codes
Diagnostic interpretation
This result has the HRESULT value 0x80290116. AllStat records the condition as “The data given does not appear to be a valid key blob”.
Evidence to capture
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions this result or the tpmapi / key / blob operation.
- compare the failing machine with a working one at the same configuration boundary: component version, policy, registration, identity, and target resource.
Retry and recovery
Retry this result only when the owning API documents a transient state or after the condition described as “The data given does not appear to be a valid key blob” has changed.
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