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NS_E_DRM_MALFORMED_CONTENT_HEADER
The exact DRM condition
NS_E_DRM_MALFORMED_CONTENT_HEADER is Windows Media DRM HRESULT 0xC00D279C. It identifies the DRM content header does not conform to the format required for license/key processing. The useful scope is the path that parses the DRM header, selects a KID and algorithm, validates signed data, creates cryptographic objects and encrypts or decrypts protected media samples; it is not a generic statement that the media player, network or file system failed.
Capture header version, length, KID, acquisition URL and parser failure.
The surrounding protocol and store state
A malformed content header, an invalid license XML document and a decryption failure occur at different boundaries and require different replacement artifacts. Protected content should be identified by hashes and KIDs in support records; content keys and complete license blobs should not be exposed.
Evidence worth preserving
- Protected identity: ASF/DRM header bytes and declared version.
- Operation state: KID, license ID and key-selection result.
- Persistence or transport: algorithm, key length and coding object type.
- Security context: signature or certificate validation status.
- Correlation point: first failing sample offset rather than only the player-level message.
Related codes and the diagnostic split
| Result | Different condition |
|---|---|
NS_E_DRM_INVALID_DATA | Invalid or corrupt data was encountered in the Windows Media DRM client |
NS_E_DRM_UNABLE_TO_CREATE_CODING_OBJECT | The DRM runtime cannot create the coding object required for this operation. |
NS_E_DRM_UNABLE_TO_CREATE_KEYS_OBJECT | The DRM runtime cannot create the key-management object required for this operation. |
Diagnostic sequence
- Prove the boundary by ensuring you can capture header version, length, KID, acquisition URL and parser failure.
- After you repackage or replace the content with a valid DRM header, verify both the requested right and the final store/device state.
Correcting the producing condition
Resolve the underlying condition directly: repackage or replace the content with a valid DRM header. A player reinstall, reboot or new license request is useful only when it changes the condition “malformed content header” and can be verified against the original evidence.
Representative case: The media payload is readable, but the DRM header contains malformed XML or fields.
Actions that do not prove a fix
- Avoid assuming a codec reinstall can repair a malformed DRM header or a cryptographic key mismatch.
- Avoid publishing content keys, full license blobs or decrypted media while collecting diagnostics.
Regression check
Repeat the operation that originally returned it. Assert the exact HRESULT at the producing API in the failing “malformed content header” fixture; then change only the relevant precondition and confirm that the corrected run completes without substituting a neighboring DRM result. After correcting it, verify the requested action and the final license-store, secure-clock, device or migration state relevant to “malformed content header”.
Code-specific operational note
The user-facing message “The content header does not comply with DRM requirements and cannot be used.” describes the visible condition but does not identify the producing API, object instance, or protected identity by itself.
Technical references
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