InMemorySymmetricSecurityKey.GenerateDerivedKey Method

Reference

Definition

Namespace:: System.IdentityModel.Tokens

Assembly:: System.IdentityModel.dll

Important

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Generates a derived key using the specified cryptographic algorithm and parameters for the current key.

public:
 override cli::array <System::Byte> ^ GenerateDerivedKey(System::String ^ algorithm, cli::array <System::Byte> ^ label, cli::array <System::Byte> ^ nonce, int derivedKeyLength, int offset);

public override byte[] GenerateDerivedKey (string algorithm, byte[] label, byte[] nonce, int derivedKeyLength, int offset);

override this.GenerateDerivedKey : string * byte[] * byte[] * int * int -> byte[]

Public Overrides Function GenerateDerivedKey (algorithm As String, label As Byte(), nonce As Byte(), derivedKeyLength As Integer, offset As Integer) As Byte()

Parameters

algorithm: String

A URI that represents the cryptographic algorithm to use to generate the derived key.

label: Byte[]

An array of Byte that contains the label parameter for the cryptographic algorithm.

nonce: Byte[]

An array of Byte that contains the nonce that is used to create a derived key.

derivedKeyLength: Int32

The size of the derived key.

offset: Int32

The position at which the derived key is located in the byte array that is returned from this method.

Returns

Byte[]

An array of Byte that contains the derived key.

Exceptions

InvalidOperationException

algorithm is not supported. The supported algorithms is Psha1KeyDerivation.

Remarks

To specify P-SHA1 as the cryptographic algorithm, use the Psha1KeyDerivation field.

Due to collision problems with SHA1, Microsoft recommends a security model based on SHA256 or better.

Applies to

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