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NS_E_DRM_INVALID_CERTIFICATE
The state behind the HRESULT
NS_E_DRM_INVALID_CERTIFICATE belongs to the point where the WMDRM-ND peer certificate is malformed, corrupted or fails signature validation. Diagnosis of this result therefore starts in WMDRM for Network Devices, the layer responsible for the transmitter/receiver protocol that registers a network playback device, approves it, validates proximity, opens a protected session and transcrypts licensed content for that receiver.
Confirm the producer by doing one thing first: capture certificate bytes, chain, serial number and signature-validation result.
Build a useful incident record
A complete incident ties together device certificate and serial number, registration-database entry, approval flag, validation timestamp, network session, protocol message and transcrypt policy; the minimum correlation set for it is the exact WMDRM-ND message type, device identifier, certificate chain, registration state, round-trip timing and the first protocol HRESULT.
A later generic error must not replace this evidence: the original condition remains that the WMDRM-ND peer certificate is malformed, corrupted or fails signature validation.
Reconstruct the decision
The transition that returns this result begins with capture certificate bytes, chain, serial number and signature-validation result. If that observation matches, the next state cannot be reached until the implementation can replace or renew the device certificate through the manufacturer’s trusted path. Keeping the result transition intact also shows whether a retry reused stale state or actually reevaluated the corrected input.
State table
| Field | Value |
|---|---|
| Direct check | capture certificate bytes, chain, serial number and signature-validation result |
| Policy input | requested action plus the exact license, certificate, profile, output or registration property evaluated by this result |
| Temporal state | trusted/system time, validity interval, request sequence and retry number when they influence it |
| Lower result | the earliest store, network, cryptographic, driver or provider status preceding the final it wrapper |
| Owner | operation, API/callback, object or session identifier, and component/device version associated with it |
Focused verification
- Preserve it and
0xC00D28A0before cleanup, fallback or another media item changes the context. - Run the direct check for it: capture certificate bytes, chain, serial number and signature-validation result.
- Compare the failure with a known-good case that changes only the property named by this condition: the WMDRM-ND peer certificate is malformed, corrupted or fails signature validation.
- Apply the narrow correction for it: replace or renew the device certificate through the manufacturer’s trusted path.
- Associate it with its current WMDRM for Network Devices object and the requested action.
- Repeat the same action with the same content/device identity and verify that it is not replaced by another policy or trust failure.
Interpretation limits
The established fact is that the WMDRM-ND peer certificate is malformed, corrupted or fails signature validation. That fact does not independently establish damaged media bytes, a missing decoder, a generally broken network, or invalid rights for every other action.
If the Player, encoder, setup program or device layer later emits a broader error, retain it as the first specific result. The object and operation attached to it are usually more diagnostic than a later cleanup or user-interface summary.
Neighboring security decisions
| Result | Why it points elsewhere |
|---|---|
NS_E_DRM_CERTIFICATE_REVOKED | the WMDRM-ND peer certificate is explicitly revoked |
NS_E_DRM_LICENSE_UNAVAILABLE | no license available to the transmitter authorizes the requested WMDRM-ND action |
NS_E_DRM_DEVICE_LIMIT_REACHED | the transmitter has reached the number of network devices allowed by policy or implementation |
Repair criterion
A matching correction is to replace or renew the device certificate through the manufacturer’s trusted path. Success means that the same requested action is accepted after that precise state change, not merely that another file or device happens to work.
- While investigating it, keep this restriction: Do not delete the complete device-registration database before preserving the failing device record and certificate chain; that removes the distinction between registration, approval, validation and session failures.
- Do not alter trusted time, revocation enforcement, certificate validation or output policy merely to suppress it; that bypasses the decision instead of correcting its input.
- Retain one failing artifact and one corrected artifact so the resolution of it can be regression-tested.
Acceptance condition
For the final it test, keep the content KID or file hash, requested action, user/account, device identity and output route unchanged wherever they apply.
Technical references
- Windows Media DRM 10 for Network Devices — defines the platform objects used when diagnosing it.
- Device registration — documents the protocol or API boundary behind it.
- Using the WMDRM-ND protocol — provides the normative workflow relevant to it.
- MS-DRMND protocol specification — lists the security and state transitions used to interpret it.
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