What does HRESULT 0x80090027 (NTE_INVALID_PARAMETER) mean?

NTE_INVALID_PARAMETER

NTE_INVALID_PARAMETER concerns cryptographic call contract. At least one argument violates the provider API contract, even if the pointer itself is readable and the algorithm or key otherwise exists.

Where the status is selected

The provider has been reached, but the request does not satisfy the contract for selecting a container, setting a property, or passing an operation-specific structure. Treat names, scope flags, key specifications, structure sizes, nullability, and creation state as one transaction rather than debugging only the most visible argument.

Evidence that changes the diagnosis

1. 1. All flags and structure sizes at the returning API boundary
   Log flags, padding structures, property names, buffer lengths, and nullability exactly as supplied.
2. 2. Provider, container or key name, user-versus-machine scope, and create-versus-open intent
   Validate structure sizes and initialization, especially cbSize fields and algorithm-specific padding data.
3. 3. The same call captured from a successful request against the same provider
   Compare the call against the documented two-pass sizing and input/output aliasing rules.

For cryptographic call contract, these observations are deliberately nonsecret: identifiers, lengths, provider names, policy selections, and state transitions usually support comparison without recording private keys, passwords, PINs, or plaintext.

What to include in an escalation package

• A known-good control result produced under the same identity, architecture, and provider selection.

A controlled way to reproduce it

Build a minimal call with explicit provider selection and a fresh nonproduction object. Add one flag or property at a time until the status returns in a cryptographic call contract investigation. This identifies whether the failure belongs to selection, object state, or one optional parameter without destroying the original keyset.

1. Use one known-good control that changes only the suspected part of the cryptographic call contract path.
2. Record where behavior first diverges in the cryptographic call contract path instead of judging only by the final application message.

Nearby results and misleading fixes

NTE_BAD_KEYSET_PARAM is limited to keyset selection. This result can arise from any invalid argument in the cryptographic operation. Creating a new key under a different account can make the symptom disappear while changing provider, scope, ACL, and object identity simultaneously. That is a workaround, not a diagnosis of the original contract.

For cryptographic call contract, 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.

What counts as a real resolution

The original object must be opened or configured with the documented parameter set under the intended scope, with no silent fallback to another provider or newly created container.

Technical references

These sources define the HRESULT and the relevant cryptographic call contract interface, protocol, or data format.

• Microsoft Open Specifications: HRESULT values.
• Microsoft: CryptAcquireContext.
• Microsoft: CNG Key Storage Providers.