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NS_E_DRM_ATTRIBUTE_TOO_LONG
The state behind the HRESULT
NS_E_DRM_ATTRIBUTE_TOO_LONG belongs to the point where a WMDRM-ND attribute name or value exceeds the protocol/API limit. The owner is WMDRM for Network Devices; its working contract covers 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.
Before changing the machine, record attribute identifier and encoded byte length before serialization.
State table
| Field | Value |
|---|---|
| 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 this result |
| Lower result | the earliest store, network, cryptographic, driver or provider status preceding the final this result wrapper |
| Owner | operation, API/callback, object or session identifier, and component/device version associated with it |
| Direct check | record attribute identifier and encoded byte length before serialization |
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.
That observation distinguishes it from file corruption because a WMDRM-ND attribute name or value exceeds the protocol/API limit.
Reconstruct the decision
When documenting it, state the rejected input and the expected successor state. The rejected input is demonstrated when you record attribute identifier and encoded byte length before serialization; the successor becomes reachable after you shorten or correctly encode that attribute within the supported limit. The result model is suitable for a regression fixture because its expected state change is observable without weakening the DRM policy.
Interpretation limits
The established fact is that a WMDRM-ND attribute name or value exceeds the protocol/API limit. 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.
Focused verification
- Preserve it and
0xC00D28B2before cleanup, fallback or another media item changes the context. - Compare the failure with a known-good case that changes only the property named by this condition: a WMDRM-ND attribute name or value exceeds the protocol/API limit.
- Apply the narrow correction for it: shorten or correctly encode that attribute within the supported limit.
- Associate it with its current WMDRM for Network Devices object and the requested action.
- Run the direct check for it: record attribute identifier and encoded byte length before serialization.
- Repeat the same action with the same content/device identity and verify that it is not replaced by another policy or trust failure.
Neighboring security decisions
| Result | Why it points elsewhere |
|---|---|
NS_E_DRM_BAD_REQUEST | a WMDRM-ND request has invalid framing, fields or message semantics |
NS_E_DRM_INVALID_CRL | the certificate revocation list used by WMDRM-ND is malformed, corrupt or unverifiable |
NS_E_DRM_EXPIRED_LICENSEBLOB | the license blob carried in the Cardea request has passed its validity interval |
Repair criterion
The next attempt becomes meaningful only after you shorten or correctly encode that attribute within the supported limit. Success means that the same requested action is accepted after that precise state change, not merely that another file or device happens to work.
- A broad reset is not the first step for it; 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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