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Xceed.SSH.Protocols Assembly / Xceed.SSH.Protocols Namespace / SSHTransportLayerProtocol Class / FitKey Method
This is KThis is HThis is K1


In This Topic
    FitKey Method
    In This Topic
    RFC 4253: 7.2. Output from Key Exchange
    Syntax
    'Declaration
 

    Public Function FitKey( _
   ByVal keyExchangeAlgorithm As ISSHKeyExchangeAlgorithm, _
   ByVal sharedSecret() As Byte, _
   ByVal exchangeHash() As Byte, _
   ByVal key() As Byte, _
   ByVal targetSize As Integer _
) As Byte()
    'Usage
 

    Dim instance As SSHTransportLayerProtocol
Dim keyExchangeAlgorithm As ISSHKeyExchangeAlgorithm
Dim sharedSecret() As Byte
Dim exchangeHash() As Byte
Dim key() As Byte
Dim targetSize As Integer
Dim value() As Byte
 
value = instance.FitKey(keyExchangeAlgorithm, sharedSecret, exchangeHash, key, targetSize)
    public byte[] FitKey( 
   ISSHKeyExchangeAlgorithm keyExchangeAlgorithm,
   byte[] sharedSecret,
   byte[] exchangeHash,
   byte[] key,
   int targetSize
)

    Parameters

    keyExchangeAlgorithm
    sharedSecret
    This is KThis is HThis is K1
    exchangeHash
    key
    targetSize
    Remarks
    Key data MUST be taken from the beginning of the hash output. As many bytes as needed are taken from the beginning of the hash value. If the key length needed is longer than the output of the HASH, the key is extended by computing HASH of the concatenation of K and H and the entire key so far, and appending the resulting bytes (as many as HASH generates) to the key. This process is repeated until enough key material is available; the key is taken from the beginning of this value. In other words: K1 = HASH(K || H || X || session_id) (X is e.g., "A") K2 = HASH(K || H || K1) K3 = HASH(K || H || K1 || K2) ... key = K1 || K2 || K3 || ...
    Supported Frameworks

    .NET: net5.0, net5.0-windows, net6.0, net6.0-macos, net6.0-windows, net7.0, net7.0-macos, net7.0-windows, net8.0, net8.0-browser, net8.0-macos, net8.0-windows, net9.0, net9.0-browser, net9.0-macos, net9.0-windows, net10.0, net10.0-browser, net10.0-macos, net10.0-windows.

    .NET Standard: netstandard2.0, netstandard2.1

    .NET Framework: net20, net35, net40, net403, net45, net451, net452, net46, net461, net462, net463, net47, net471, net472, net48, net481.

    See Also

    Reference

    SSHTransportLayerProtocol Class
    SSHTransportLayerProtocol Members

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