ML-DSA: NCrypt does not support signing empty data #116461
Description
Passing a zero length pHash buffer to NCryptSignHash gives the following error:
Failed System.Security.Cryptography.Tests.MLDsaCngTests_AllowPlaintextExport.GenerateSignVerifyEmptyMessageWithContext(algorithm: MLDsaAlgorithm { Name = "ML-DSA-44", PrivateSeedSizeInBytes = 32, PublicKeySizeInBytes = 1312, SecretKeySizeInBytes = 2560, SignatureSizeInBytes = 2420 }) [2 ms]
Error Message:
System.Security.Cryptography.CryptographicException : The parameter is incorrect.
Stack Trace:
at System.Security.Cryptography.CngCommon.SignHash(SafeNCryptKeyHandle keyHandle, ReadOnlySpan`1 hash, Span`1 destination, AsymmetricPaddingMode paddingMode, Void* pPaddingInfo) in D:\git\runtime\src\libraries\System.Security.Cryptography\src\System\Security\Cryptography\CngCommon.SignVerify.cs:line 65
at System.Security.Cryptography.MLDsaCng.SignDataCore(ReadOnlySpan`1 data, ReadOnlySpan`1 context, Span`1 destination) in D:\git\runtime\src\libraries\System.Security.Cryptography\src\System\Security\Cryptography\MLDsaCng.Windows.cs:line 229
at System.Security.Cryptography.MLDsa.SignData(ReadOnlySpan`1 data, Span`1 destination, ReadOnlySpan`1 context) in D:\git\runtime\src\libraries\Common\src\System\Security\Cryptography\MLDsa.cs:line 128
at System.Security.Cryptography.Tests.MLDsaTestsBase.GenerateSignVerifyEmptyMessageWithContext(MLDsaAlgorithm algorithm) in D:\git\runtime\src\libraries\Common\tests\System\Security\Cryptography\AlgorithmImplementations\MLDsa\MLDsaTestsBase.cs:line 70
at System.RuntimeMethodHandle.InvokeMethod(ObjectHandleOnStack target, Void** arguments, ObjectHandleOnStack sig, BOOL isConstructor, ObjectHandleOnStack result)
at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor) in C:\d\git\runtime\src\coreclr\System.Private.CoreLib\src\System\RuntimeHandles.cs:line 1168
at System.Reflection.MethodBaseInvoker.InterpretedInvoke_Method(Object obj, IntPtr* args) in C:\d\git\runtime\src\coreclr\System.Private.CoreLib\src\System\Reflection\MethodBaseInvoker.CoreCLR.cs:line 36
at System.Reflection.MethodBaseInvoker.InvokeDirectByRefWithFewArgs(Object obj, Span`1 copyOfArgs, BindingFlags invokeAttr) in C:\d\git\runtime\src\libraries\System.Private.CoreLib\src\System\Reflection\MethodBaseInvoker.cs:line 174
The tests have been disabled until this is supported by Windows.