DSA.TryCreateSignature Method

Definition

Namespace:

System.Security.Cryptography

Assemblies:

netstandard.dll, System.Security.Cryptography.dll

Overloads

TryCreateSignature(ReadOnlySpan<Byte>, Span<Byte>, Int32)	Attempts to create the DSA signature for the specified hash into the provided buffer.
TryCreateSignature(ReadOnlySpan<Byte>, Span<Byte>, DSASignatureFormat, Int32)	Attempts to create the DSA signature for the specified hash value in the indicated format and place it into the provided buffer.

TryCreateSignature(ReadOnlySpan<Byte>, Span<Byte>, Int32)

Source:

DSA.cs

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

C#

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

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.

TryCreateSignature(ReadOnlySpan<Byte>, Span<Byte>, DSASignatureFormat, Int32)

Source:

DSA.cs

Attempts to create the DSA signature for the specified hash value in the indicated format and place it into the provided buffer.

C#

public bool TryCreateSignature(ReadOnlySpan<byte> hash, Span<byte> destination, System.Security.Cryptography.DSASignatureFormat signatureFormat, out int bytesWritten);

Parameters

hash

ReadOnlySpan<Byte>

The hash value to sign.

destination

Span<Byte>

The buffer to receive the signature.

signatureFormat

DSASignatureFormat

The encoding format to use for the signature.

bytesWritten

Int32

When this method returns, contains a value that indicates the number of bytes written to destination. This parameter is treated as uninitialized.

Returns

Boolean

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

Exceptions

ArgumentOutOfRangeException

signatureFormat is not a known format.

CryptographicException

An error occurred in the signing operation.