ECDsaCng.SignData Method (Stream)


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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.

Exception Condition

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.


for permission to sign data. Demand value: Demand. Associated enumeration: KeyContainerPermissionFlags.Sign

.NET Framework
Available since 3.5
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