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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 discriminator: Validate the key blob structure, encoding and provenance before passing it to the TPM API. This result identifies malformed or incompatible key data rather than a key-size policy alone.
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