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ECDsaCng.SignData Method (Stream)

Generates a signature for the specified data stream, reading to the end of the stream.

Namespace:  System.Security.Cryptography
Assembly:  System.Core (in System.Core.dll)

public byte[] SignData(
	Stream data


Type: System.IO.Stream

The data stream to be signed.

Return Value

Type: System.Byte[]
A digital signature for the specified data stream.


data is null.


The key information that is associated with the instance does not have a private key.

This method generates a signature for the specified data stream by hashing the input data using the HashAlgorithm property, and then signing the result.

The KeyContainerPermissionFlags.Sign flag is required if the Cryptography Next Generation (CNG) key is not randomly generated by the ECDsaCng object.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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