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SEC_E_NO_CONTEXT
SEC_E_NO_CONTEXT should be read at the missing or expired SSPI context boundary. The caller attempted to query, continue, encrypt, decrypt, impersonate, or delete a security context that does not exist in the expected state. For missing or expired SSPI context, the useful diagnostic question is which concrete object and operation caused Windows to select this exact HRESULT—not whether a key, certificate, account, file, or device merely “works.”
What the code establishes
An SSPI context is created and advanced through token exchanges before it can be queried, used for message protection, impersonated, or deleted. Log the context-handle lifecycle and every return from InitializeSecurityContext or AcceptSecurityContext rather than retaining only the final application error.
Facts to preserve before changing state
| Record | Why it matters for this code |
|---|---|
| context creation call, package, target, requested attributes, and returned attributes | In the path, pINs the result to a specific handshake or KDC decision. |
| token-exchange sequence and whether completion was required | Separates identity proof from delegation or transport policy. |
| ownership, thread handoff, expiry, deletion, and reuse of the context handle | Keeps target names, package selection, and context state comparable. |
Code-specific checks:
- Trace the context handle from the first InitializeSecurityContext or AcceptSecurityContext call through every continuation.
- Check for cleanup on intermediate status returns and for concurrent use after DeleteSecurityContext.
- Record package status on each negotiation leg so an earlier failure is not hidden by the later no-context error.
Correlate the failure with state changes
In the path, authentication failures are multi-leg transactions. Align client SSPI calls, DNS and target-name resolution, policy refresh, domain-controller or KDC events, ticket acquisition, server acceptance, and any proxy or TLS transition. A single application timestamp is not enough to tell whether the decision was local policy, peer identity, context state, or KDC behavior.
- Package and target name, requested and returned context attributes, and each SSPI return in order.
- In the path, relevant Group Policy result, SPN or UPN resolution, contacted DC/KDC, and ticket or certificate identities.
- One permitted control target and one deliberately rejected target evaluated with the same client build in a missing or expired SSPI context investigation.
Isolation procedure
Keep one context in a small single-threaded handshake through completion, then immediately perform the operation that failed., add pooling, caching, or cross-thread use only after the basic lifecycle works.
| Test | Interpretation |
|---|---|
| Same input, known-good path | For missing or expired SSPI context, success moves attention toward the selected provider, policy, device, context, or transaction state. |
| Known-good input, failing path | For missing or expired SSPI context, failure suggests that the environment or selected object is independently unable to perform the operation. |
| Original path after one isolated change | For missing or expired SSPI context, this comparison demonstrates whether the proposed correction addresses the original condition. |
Common wrong turns
This is a context-lifetime result, not an authentication verdict about the peer. Restarting only the final encrypt, query, or impersonation call cannot recreate a context that never completed or was already deleted.
For missing or expired SSPI context, also retain the original numeric value; neighboring constants can encode materially different remediation paths even when an application presents all of them as an authentication, certificate, or security failure.
Proving the intended path works
The context must reach the required completed state, expose the expected attributes, and remain valid for the exact protected operation before orderly deletion. Keep a regression case that uses nonsecret identifiers and expected outcomes, including one negative control that must continue to fail.
Technical references
These sources define the HRESULT and the relevant missing or expired SSPI context interface, protocol, or data format.
- Microsoft Open Specifications: HRESULT values.
- Microsoft: InitializeSecurityContext.
- Microsoft: Authentication return values.
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