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STG_E_CSS_AUTHENTICATION_FAILURE
DVD CSS authentication failed
STG_E_CSS_AUTHENTICATION_FAILURE is HRESULT 2147681030 (0x80030306) from winerror.h. The documented description is “Copy Protection Error - this condition.” The result belongs to CSS authentication between the application or driver stack and a DVD drive. This HRESULT is most useful when tied to the method and lifecycle phase where the challenge-response exchange did not establish an authenticated CSS session.
This result means that the challenge-response exchange did not establish an authenticated CSS session.
Where the result appears
- This result can surface in a DVD CSS authentication, key exchange, protected-sector reading, or region-management logic.
- Map the failure to one concrete operation among IOCTL_DVD_READ_KEY, DVD_COPY_PROTECT_KEY, AGID allocation, challenge and bus keys, title offsets, and region data.
- Preserve physical drive identity, media ID, region state, AGID or session generation, key type, title offset, sector range, and driver stack before releasing or replacing the object that returned this result.
An incident record must distinguish caller, runtime, provider, and backing resource while testing whether the challenge-response exchange did not establish an authenticated CSS session.
Typical causes and interpretation
The immediate contract boundary is specific: the challenge-response exchange did not establish an authenticated CSS session. Common cause branches include the following:
- Challenge or bus keys do not match.
- The session identifier is stale.
- A filter or virtualization layer alters the authentication exchange.
Confirm the cause branch that explains why the challenge-response exchange did not establish an authenticated CSS session by using call arguments, object state, metadata, device information, or provider traces.
Correct handling and recovery
The primary recovery is to release the failed session, open the physical device through the supported stack, and perform a fresh key exchange in documented order. The failure report should capture the relevant state during CSS authentication between the application or driver stack and a DVD drive so it is clear why the challenge-response exchange did not establish an authenticated CSS session.
The owner of it must define idempotency, cancellation, attempt limits, and reconciliation for the failed CSS authentication between the application or driver stack and a DVD drive.
Practical scenario
A DVD reader reuses an AGID after another process invalidates it; a new session and complete challenge-response sequence succeeds.
Difference from related HRESULTs
STG_E_CSS_KEY_NOT_ESTABLISHED says no session key was established; it identifies failure of the authentication exchange itself.
Developer and administrator guidance
Use authorized test media to cover fresh sessions, stale AGIDs, title changes, scrambled sectors, region mismatch, and exhausted reset counts.
Broad permission or compatibility changes are inappropriate unless evidence for the challenge-response exchange did not establish an authenticated CSS session points to that layer.
References
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