[.NET 5 RC2 Regression] HashAlgorithm.ComputeHash is unsupported on 'browser'

[SommerEngineering]

Describe the bug

In .NET 5 RC1 the hash algorithms were not included, cf. dotnet/runtime#42625. This has been fixed (dotnet/runtime#42267): In .NET 5 RC2 we can use hash algorithms again, e.g. to hash the user passwords on the client side. However, the compiler issues a warning, which is a false positive kind of error:

Login.razor.cs(140,28): warning CA1416: 'HashAlgorithm.ComputeHash(byte[])' is unsupported on 'browser'

I assume that this is an error in the "Browser platform compatibility tooling".

To Reproduce

Use the following code in Blazor:

using SHA512 sha512 = new SHA512Managed();
var data = sha512.ComputeHash(Encoding.UTF8.GetBytes("password"));

Then, dotnet build will show the warning but the code works fine, though.

Further technical details

.NET SDK (reflecting any global.json):
Version: 5.0.100-rc.2.20479.15
Commit: da7dfa8840

Runtime Environment:
OS Name: Windows
OS Version: 10.0.17763
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\5.0.100-rc.2.20479.15\

Host (useful for support):
Version: 5.0.0-rc.2.20475.5
Commit: c5a3f49c88

.NET SDKs installed:
3.1.202 [C:\Program Files\dotnet\sdk]
3.1.402 [C:\Program Files\dotnet\sdk]
5.0.100-rc.2.20479.15 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.All 2.1.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 5.0.0-rc.2.20475.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.18 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 5.0.0-rc.2.20475.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.8 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 5.0.0-rc.2.20475.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

[campersau]

I think that this is already worked on here dotnet/runtime#43387
See also related issue dotnet/runtime#43380

[SommerEngineering]

Thanks @campersau for letting me know 🙂 I close the issue.