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FWP_E_KEY_DICTATION_INVALID_KEYING_MATERIAL
FWP_E_KEY_DICTATION_INVALID_KEYING_MATERIAL means a key manager attempted to dictate keying material that failed WFP validation.
What to verify for FWP_E_KEY_DICTATION_INVALID_KEYING_MATERIAL
- Validate key sizes, transform compatibility, lifetime fields, and security-association selectors before passing the data to WFP.
- Ensure the key material was generated for the exact negotiated policy, not reused from another SA.
- Collect IKE/IPsec diagnostics while reproducing the problem, but avoid logging secret key material.
Microsoft: capture IPsec events with netsh wfp
Diagnostic interpretation of FWP_E_KEY_DICTATION_INVALID_KEYING_MATERIAL
FWP_E_KEY_DICTATION_INVALID_KEYING_MATERIAL has the HRESULT value 0x80320040. AllStat records the condition as “A key manager dictated invalid keys”. For FWP_E_KEY_DICTATION_INVALID_KEYING_MATERIAL, in practice, interpret that wording at the boundary owned by Windows Filtering Platform or IPsec policy state, rather than treating the value as a generic Windows message.
Evidence to capture for FWP_E_KEY_DICTATION_INVALID_KEYING_MATERIAL
- Record the exact COM method or Windows API, its input object, the calling thread, and the full 0x80320040 value before a wrapper converts it to an exception or Boolean result.
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions FWP_E_KEY_DICTATION_INVALID_KEYING_MATERIAL or the fwp / key / dictation / keying / material operation.
- Preserve the first failure in the call chain; a later HRESULT can describe cleanup rather than the original fwp / key / dictation / keying / material condition.
Retry and recovery for FWP_E_KEY_DICTATION_INVALID_KEYING_MATERIAL
Retry FWP_E_KEY_DICTATION_INVALID_KEYING_MATERIAL only when the owning API documents a transient state or after the condition described as “A key manager dictated invalid keys” has changed. For FWP_E_KEY_DICTATION_INVALID_KEYING_MATERIAL, configuration, policy, format, and authorization failures normally require correction first; an immediate loop can hide the original call site and add secondary errors.
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