Remove unused DataProtection configuration from Sidecar#3776
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Remove unused DataProtection configuration from Sidecar#3776
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Copilot
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[WIP] Fix DataProtection in SideCar to use encryption
Remove unused DataProtection configuration from Sidecar
Apr 15, 2026
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Agent-Logs-Url: https://github.com/AzureAD/microsoft-identity-web/sessions/bf35223d-645a-489b-9d64-3769b4a891af Co-authored-by: bgavrilMS <12273384+bgavrilMS@users.noreply.github.com>
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Pinned [Microsoft.Identity.Web](https://github.com/AzureAD/microsoft-identity-web) at 4.8.0. <details> <summary>Release notes</summary> _Sourced from [Microsoft.Identity.Web's releases](https://github.com/AzureAD/microsoft-identity-web/releases)._ ## 4.8.0 ## What's Changed * Bump flatted from 3.3.3 to 3.4.2 in /tests/DevApps/SidecarAdapter/typescript by @dependabot[bot] in AzureAD/microsoft-identity-web#3753 * Update changelog.md for ID.Web 4.6.0 by @bgavrilMS in AzureAD/microsoft-identity-web#3756 * Add token binding to MicrosoftIdentityMessageHandler by @cpp11nullptr in AzureAD/microsoft-identity-web#3743 * Bump picomatch in /tests/DevApps/SidecarAdapter/typescript by @dependabot[bot] in AzureAD/microsoft-identity-web#3759 * Documentation: Clarify managed identity credential types for containerized vs. VM/App Service deployments by @Copilot in AzureAD/microsoft-identity-web#3585 * Bump path-to-regexp from 8.3.0 to 8.4.0 in /tests/DevApps/SidecarAdapter/typescript by @dependabot[bot] in AzureAD/microsoft-identity-web#3762 * Upgrade Microsoft Application Insights packages by @RojaEnnam in AzureAD/microsoft-identity-web#3763 * Use Abstractions 12 by @pmaytak in AzureAD/microsoft-identity-web#3761 * Post-4.7.0 by @pmaytak in AzureAD/microsoft-identity-web#3768 * Fix Comp Gov DOTNET-Security-10.0 by @reginayap8 in AzureAD/microsoft-identity-web#3769 * Upgrade CodeQL to V4: Fix 10 CodeQL Analysis Warnings and Errors by @reginayap8 in AzureAD/microsoft-identity-web#3770 * fix warnings by @gladjohn in AzureAD/microsoft-identity-web#3771 * adding examples for using postgres as a distributed cache by @JaredMSFT in AzureAD/microsoft-identity-web#3766 * Suppress AOT configuration-binding SYSLIB warnings in AotCompatibility test app by @Copilot in AzureAD/microsoft-identity-web#3774 * Bump vite from 7.1.11 to 7.3.2 in /tests/DevApps/SidecarAdapter/typescript by @dependabot[bot] in AzureAD/microsoft-identity-web#3772 * Skip legacy B2C local-account Todo UI test in WebAppUiTests by @Copilot in AzureAD/microsoft-identity-web#3778 * Fix initialization of ConfidentialClientApplicationOptions in MergedOptions by @cpp11nullptr in AzureAD/microsoft-identity-web#3760 * Bump net8/net9/net10 runtime package baselines to patched crypto servicing versions by @Copilot in AzureAD/microsoft-identity-web#3779 * Fix flaky certificate test failures on CI by @gladjohn in AzureAD/microsoft-identity-web#3780 * MTLS Without Tokens Support by @tlupes in AzureAD/microsoft-identity-web#3747 * Fix CredentialsProvider DI lifetime mismatch causing startup crash in Development by @Avery-Dunn in AzureAD/microsoft-identity-web#3783 * Remove unused DataProtection configuration from Sidecar by @Copilot in AzureAD/microsoft-identity-web#3776 ## New Contributors * @RojaEnnam made their first contribution in AzureAD/microsoft-identity-web#3763 * @reginayap8 made their first contribution in AzureAD/microsoft-identity-web#3769 * @JaredMSFT made their first contribution in AzureAD/microsoft-identity-web#3766 **Full Changelog**: AzureAD/microsoft-identity-web@4.6.0...4.8.0 Commits viewable in [compare view](AzureAD/microsoft-identity-web@4.7.0...4.8.0). </details> Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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The Sidecar uses in-memory token caching (
AddInMemoryTokenCaches), so theConfigureDataProtectionmethod was never actually protecting tokens at rest. Beyond being dead code, it introduced compliance concerns: keys were persisted to disk in plaintext by default, and the optional certificate-based encryption had no rotation mechanism.Changes
Program.cs: RemoveConfigureDataProtectionmethod and its call site; drop unusedusingdirectives forSystem.Security.Cryptography.X509CertificatesandMicrosoft.AspNetCore.DataProtection. The Sidecar now relies on ASP.NET Core's default ephemeral in-memory data protection.README.md: Remove the Data protection configuration entry documenting the now-deletedDATA_PROTECTION_KEYS_PATH,DATA_PROTECTION_CERT_PATH, andDATA_PROTECTION_CERT_PASSWORDenvironment variables.