DSA.TryCreateSignature Method

Definition

Namespace:

System.Security.Cryptography

Assembly:

netstandard.dll

Attempts to create the DSA signature for the specified hash into the provided buffer.

public:
 virtual bool TryCreateSignature(ReadOnlySpan<System::Byte> hash, Span<System::Byte> destination, [Runtime::InteropServices::Out] int % bytesWritten);

public virtual bool TryCreateSignature(ReadOnlySpan<byte> hash, Span<byte> destination, out int bytesWritten);

abstract member TryCreateSignature : ReadOnlySpan<byte> * Span<byte> * int -> bool
override this.TryCreateSignature : ReadOnlySpan<byte> * Span<byte> * int -> bool

Public Overridable Function TryCreateSignature (hash As ReadOnlySpan(Of Byte), destination As Span(Of Byte), ByRef bytesWritten As Integer) As Boolean

Parameters

hash

ReadOnlySpan<Byte>

The hash to sign.

destination

Span<Byte>

The byte span to receive the signature.

bytesWritten

Int32

When this method returns, contains a value that indicates the number of bytes written to destination.

Returns

Boolean

true if destination is large enough to receive the result; otherwise, false.

Exceptions

CryptographicException

This instance represents only a public key.

-or-

The implementation type only supports legacy DSA (FIPS 186-2), and hash is not a 20-byte value.

-or-

Creating the signature otherwise failed.

Remarks

The default implementation of this method is to call CreateSignature(Byte[]) and copy the result to destination. Derived types should override this method to avoid the intermediate array creation.