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NS_E_DRM_INVALID_KID
Meaning in the active workflow
The first actionable fact in NS_E_DRM_INVALID_KID is that the supplied key identifier is malformed or not valid for the DRM operation. This result comes from Windows Media DRM client internals, whose state machine implements the client DRM engine that initializes security components, validates content and license identifiers, performs individualization, manages license chains and coordinates protected playback capabilities.
Confirm the producer by doing one thing first: preserve the exact KID encoding and compare it with the protected content header.
Diagnostic checklist
| Field | Value |
|---|---|
| Owner | operation, API/callback, object or session identifier, and component/device version associated with this result |
| Direct check | preserve the exact KID encoding and compare it with the protected content header |
Preserve the original generation
It is meaningful only while the following state remains associated with one operation: DRM component version, KID, content header signature, license chain, uplink license, individualization state, portable-device registrations and local configuration. Preserve the KID and header hash, DRM component version, individualization status, license-chain identifiers, registry/configuration lookup and the first client callback reporting the failure.
The comparison is useful only if it preserves the fact that the supplied key identifier is malformed or not valid for the DRM operation.
Failure model
A useful failure model links cause and recovery: the supplied key identifier is malformed or not valid for the DRM operation. Verify that model when you preserve the exact KID encoding and compare it with the protected content header, then make the smallest change needed to supply the correctly encoded KID generated for that content key. The result comparison should preserve content and device identity so success cannot be attributed to testing a different asset.
What remains unknown
The supplied key identifier is malformed or not valid for the DRM operation.
Confirm the condition
- Preserve it and
0xC00D2849before cleanup, fallback or another media item changes the context. - Apply the targeted fix: supply the correctly encoded KID generated for that content key.
- Associate it with its current Windows Media DRM client internals object and the requested action.
- Run the direct check: preserve the exact KID encoding and compare it with the protected content header.
- Compare the failure with a known-good case that changes only the property named by this condition: the supplied key identifier is malformed or not valid for the DRM operation.
Compare neighboring states
| Result | Why it points elsewhere |
|---|---|
NS_E_DRM_CLIENT_CODE_EXPIRED | the DRM client security code is outside its accepted validity period |
NS_E_DRM_NO_UPLINK_LICENSE | a chained license references a root/uplink license that is absent from the available license set |
NS_E_DRM_LICENSE_INITIALIZATION_ERROR | the DRM engine could not initialize the license object or license subsystem for this operation |
Operational response
Correct this layer directly and supply the correctly encoded KID generated for that content key.
Technical references
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