Document DSA removal from macOS in .NET 11 #50971
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Co-authored-by: gewarren <[email protected]>
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[WIP] Remove DSA support for macOS due to deprecation
Document DSA removal from macOS in .NET 11
Jan 7, 2026
Updated recommendations for migrating away from DSA algorithm and clarified affected APIs.
gewarren
approved these changes
Jan 9, 2026
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Pull request overview
This PR documents the removal of DSA (Digital Signature Algorithm) support from macOS in .NET 11 Preview 1. Apple deprecated the SecurityTransforms library that provided the implementation, which only supported weak DSA-1024 with SHA-1 and never supported key generation.
Key Changes
- Added comprehensive breaking change documentation for DSA removal from macOS
- Updated the .NET 11 breaking changes index to include new Cryptography section
- Added navigation entry in the table of contents
- Updated unsupported APIs list with DSA-related APIs for macOS
Reviewed changes
Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| docs/core/compatibility/cryptography/11/dsa-removed-macos.md | New breaking change document detailing DSA removal, affected APIs, and migration guidance to EC-DSA |
| docs/core/compatibility/11.md | Added Cryptography section with reference to DSA removal document |
| docs/core/compatibility/toc.yml | Added Cryptography navigation entry under .NET 11 breaking changes |
| docs/core/compatibility/unsupported-apis.md | Added five DSA-related API entries for macOS platform with .NET 11+ footnote |
Co-authored-by: Copilot <[email protected]>
vcsjones
approved these changes
Jan 9, 2026
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DSA (Digital Signature Algorithm) support has been removed from macOS in .NET 11 Preview 1. Apple deprecated the SecurityTransforms library that provided the implementation, which only supported weak DSA-1024 with SHA-1 and never supported key generation.
Changes
New breaking change document:
docs/core/compatibility/cryptography/11.0/dsa-removed-macos.mdPlatformNotSupportedExceptionthrown by DSA APIs on macOSDSA.Create()→ECDsa.Create()Index updates: Added Cryptography section to
docs/core/compatibility/11.mdTOC updates: Added navigation entry in
docs/core/compatibility/toc.ymlAffected APIs
System.Security.Cryptography.DSA.Create(all overloads)System.Security.Cryptography.DSACryptoServiceProvider(all constructors)System.Security.Cryptography.X509Certificates.DSACertificateExtensions.*(GetDSAPrivateKey, GetDSAPublicKey, CopyWithPrivateKey)iOS, tvOS, and MacCatalyst never supported DSA and remain unaffected.
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