Prf.Bytes Method

Generate output bytes using a pseudorandom function (PRF).

Syntax

public static byte[] Bytes(
   int numBytes,
   byte[] message,
   byte[] key,
   Prf.Alg prfAlg,
   string customStr = "" 
)

Public Shared Function Bytes (
   numBytes As Integer,
   message As Byte(),
   key As Byte(),
   prfAlg As Prf.Alg,
   Optional customStr As String = "" 
) As Byte()

Parameters

numBytes  Int32

Required number of output bytes.

message  Byte

Input message data.

key  Byte

Key.

prfAlg  Prf.Alg

PRF algorithm.

customStr  String  (Optional)

Customization string (optional).

Return Value

Example

// Sample #1: "standard" KMAC output length KMAC128 => 256 bits, no custom string
int nbytes = 256 / 8;
byte[] msg = "00010203".FromHex();
byte[] key = "404142434445464748494A4B4C4D4E4F505152535455565758595A5B5C5D5E5F".FromHex();
byte[] b = Prf.Bytes(nbytes, msg, key, Prf.Alg.Kmac128);
Console.WriteLine("OUT={0}", b.ToHex());
// E5780B0D3EA6F7D3A429C5706AA43A00FADBD7D49628839E3187243F456EE14E

See Also

VB6/C equivalent: PRF_Bytes

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