Enable mTLS Proof‑of‑Possession for Client‑Assertion Delegates #5409
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#minor Updated [Azure.Identity](https://github.com/Azure/azure-sdk-for-net) from 1.14.2 to 1.15.0. <details> <summary>Release notes</summary> _Sourced from [Azure.Identity's releases](https://github.com/Azure/azure-sdk-for-net/releases)._ No release notes found for this version range. Commits viewable in [compare view](https://github.com/Azure/azure-sdk-for-net/commits). </details> Updated [Microsoft.Identity.Client](https://github.com/AzureAD/microsoft-authentication-library-for-dotnet) from 4.74.1 to 4.76.0. <details> <summary>Release notes</summary> _Sourced from [Microsoft.Identity.Client's releases](https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/releases)._ ## 4.76.0 ## What's Changed * Removal of `ExperimentalFeatures` flag on `WithMtlsProofOfPossession` API: by @gladjohn in AzureAD/microsoft-authentication-library-for-dotnet#5402 * #5400 Fixing issue that leads to multiple active access tokens in the cache for non-tenanted oidc authority by @andkorsh in AzureAD/microsoft-authentication-library-for-dotnet#5401 * Add Service Fabric token revocation support by @gladjohn in AzureAD/microsoft-authentication-library-for-dotnet#5421 * Update NativeInterop package version to 0.19.4 by @ashok672 in AzureAD/microsoft-authentication-library-for-dotnet#5434 * Adding WithExtraBodyParameters api by @trwalke in AzureAD/microsoft-authentication-library-for-dotnet#5389 * Enable mTLS Proof‑of‑Possession for Client‑Assertion Delegates by @gladjohn in AzureAD/microsoft-authentication-library-for-dotnet#5409 ## New Contributors * @andkorsh made their first contribution in AzureAD/microsoft-authentication-library-for-dotnet#5401 **Full Changelog**: AzureAD/microsoft-authentication-library-for-dotnet@4.74.1...4.76.0 Commits viewable in [compare view](AzureAD/microsoft-authentication-library-for-dotnet@4.74.1...4.76.0). </details> Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore <dependency name> major version` will close this group update PR and stop Dependabot creating any more for the specific dependency's major version (unless you unignore this specific dependency's major version or upgrade to it yourself) - `@dependabot ignore <dependency name> minor version` will close this group update PR and stop Dependabot creating any more for the specific dependency's minor version (unless you unignore this specific dependency's minor version or upgrade to it yourself) - `@dependabot ignore <dependency name>` will close this group update PR and stop Dependabot creating any more for the specific dependency (unless you unignore this specific dependency or upgrade to it yourself) - `@dependabot unignore <dependency name>` will remove all of the ignore conditions of the specified dependency - `@dependabot unignore <dependency name> <ignore condition>` will remove the ignore condition of the specified dependency and ignore conditions </details> Signed-off-by: dependabot[bot] <[email protected]> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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Fixes #5398
Changes proposed in this request
This pull request introduces significant enhancements to the mutual TLS Proof-of-Possession (mTLS PoP) functionality, refactors client assertion handling, and updates public APIs to support these changes. The most important changes include adding support for certificate-bound client assertions, refactoring the
ClientCredentialclasses, and introducing new public APIs for client assertion configuration.Enhancements to mTLS Proof-of-Possession:
WithMtlsProofOfPossessionmethod: Updated the method to handle multiple credential types (CertificateClientCredentialandClientAssertionDelegateCredential) and added logic for certificate-bound client assertions. Improved error handling for cases where certificates are not provided. (src/client/Microsoft.Identity.Client/ApiConfig/AcquireTokenForClientParameterBuilder.cs, src/client/Microsoft.Identity.Client/ApiConfig/AcquireTokenForClientParameterBuilder.csL99-R126)src/client/Microsoft.Identity.Client/MsalErrorMessage.cs, src/client/Microsoft.Identity.Client/MsalErrorMessage.csL439-R439)Refactoring of Client Assertion Handling:
ClientAssertionDelegateCredential: Added a new class to handle client assertions supplied via a delegate, supporting JWTs with optional certificates for mTLS PoP. This replaces the removedSignedAssertionDelegateClientCredentialclass. (src/client/Microsoft.Identity.Client/Internal/ClientCredential/ClientAssertionDelegateCredential.cs, [1];src/client/Microsoft.Identity.Client/Internal/ClientCredential/SignedAssertionDelegateClientCredential.cs, [2]src/client/Microsoft.Identity.Client/OAuth2/OAuthConstants.cs, src/client/Microsoft.Identity.Client/OAuth2/OAuthConstants.csR69)Updates to Public APIs:
AssertionResponseclass: Introduced a new public class to encapsulate client assertions and optional certificates for token binding. (src/client/Microsoft.Identity.Client/AppConfig/AssertionResponse.cs, src/client/Microsoft.Identity.Client/AppConfig/AssertionResponse.csR1-R22)WithClientAssertionmethods: Refactored existing methods to use the newAssertionResponseclass and added a new overload for configuring client assertions with certificate binding. (src/client/Microsoft.Identity.Client/AppConfig/ConfidentialClientApplicationBuilder.cs, [1] [2] [3]PublicAPI.Unshipped.txtfiles across multiple frameworks to include new APIs for client assertion configuration. (src/client/Microsoft.Identity.Client/PublicApi/net462/PublicAPI.Unshipped.txt, [1];src/client/Microsoft.Identity.Client/PublicApi/net472/PublicAPI.Unshipped.txt, [2];src/client/Microsoft.Identity.Client/PublicApi/net8.0-android/PublicAPI.Unshipped.txt, [3]Miscellaneous Changes:
IsExternalInitfor backward compatibility: Introduced a compatibility shim forIsExternalInitto supportinitproperties on older frameworks. (src/client/Microsoft.Identity.Client/IsExternalInit.cs, src/client/Microsoft.Identity.Client/IsExternalInit.csR1-R11)src/client/Microsoft.Identity.Client/ApiConfig/AcquireTokenForClientParameterBuilder.cs, src/client/Microsoft.Identity.Client/ApiConfig/AcquireTokenForClientParameterBuilder.csL1-R1)These changes collectively improve the flexibility and robustness of client assertion handling and enhance support for mTLS PoP scenarios.
Testing
unit
Performance impact
none
Documentation