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Marc Schier
3c4661d2bf
## Failure MCP auto-accept mutated the shared application certificate manager and accepted every certificate error, so one permissive connection could affect concurrent or later strict sessions. The durable-subscription sample also serialized complete user identity tokens, including user-name passwords and issued bearer tokens. ## Fix - Isolate auto-accept certificate managers/configurations per connection and keep their lifetime with the managed session. - Auto-accept only `BadCertificateUntrusted`; retain strict validation for all other certificate errors and shared sessions. - Version the durable store and reject the previous unsafe format. - Remove user-name passwords before persistence and reject issued-token subscriptions rather than storing bearer credentials. - Add focused tools tests plus solution, project, and durable-subscription docs. ## Reference - OPC 10000-4 Session identity-token and application-certificate security. - Split from #4021. ## Tests - `Opc.Ua.Tools.Tests` Release: 7 passed on net10.0; 4 passed on net48. - `Quickstarts.Servers` Release builds passed on net10.0 and net48 with zero warnings/errors. - `Opc.Ua.Mcp` Release net10.0 build passed with zero warnings/errors. --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>