HashAlgorithm.TransformBlock(Byte[], Int32, Int32, Byte[], Int32) HashAlgorithm.TransformBlock(Byte[], Int32, Int32, Byte[], Int32) HashAlgorithm.TransformBlock(Byte[], Int32, Int32, Byte[], Int32) HashAlgorithm.TransformBlock(Byte[], Int32, Int32, Byte[], Int32) Method

public:
 virtual int TransformBlock(cli::array <System::Byte> ^ inputBuffer, int inputOffset, int inputCount, cli::array <System::Byte> ^ outputBuffer, int outputOffset);

public int TransformBlock (byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset);

abstract member TransformBlock : byte[] * int * int * byte[] * int -> int
override this.TransformBlock : byte[] * int * int * byte[] * int -> int

Public Function TransformBlock (inputBuffer As Byte(), inputOffset As Integer, inputCount As Integer, outputBuffer As Byte(), outputOffset As Integer) As Integer

Parametry

Návraty

Implementuje

Výjimky

Příklady

Následující příklady kódu používají TransformFinalBlock metodou TransformBlock metody k vytvoření hodnoty hash řetězce.The following code examples use the TransformFinalBlock method with the TransformBlock method to hash a string.

using System;
using System.Security.Cryptography;
using System.Text;

class MainClass
{
	public static void Main()
	{
		RandomNumberGenerator rnd = RandomNumberGenerator.Create();

		byte[] input = new byte[20];
		rnd.GetBytes(input);

		Console.WriteLine("Input        : {0}\n", BytesToStr(input));
		PrintHash(input);
		PrintHashOneBlock(input);
		PrintHashMultiBlock(input, 1);
		PrintHashMultiBlock(input, 2);
		PrintHashMultiBlock(input, 3);
		PrintHashMultiBlock(input, 5);
		PrintHashMultiBlock(input, 10);
		PrintHashMultiBlock(input, 11);
		PrintHashMultiBlock(input, 19);
		PrintHashMultiBlock(input, 20);
		PrintHashMultiBlock(input, 21);
	}

	public static string BytesToStr(byte[] bytes)
	{
		StringBuilder str = new StringBuilder();

		for (int i = 0; i < bytes.Length; i++)
			str.AppendFormat("{0:X2}", bytes[i]);

		return str.ToString();
	}

	public static void PrintHash(byte[] input)
	{
		SHA256Managed sha = new SHA256Managed();
		Console.WriteLine("ComputeHash  : {0}", BytesToStr(sha.ComputeHash(input)));
	}

	public static void PrintHashOneBlock(byte[] input)
	{
		SHA256Managed sha = new SHA256Managed();
		sha.TransformFinalBlock(input, 0, input.Length);
		Console.WriteLine("FinalBlock   : {0}", BytesToStr(sha.Hash));
	}

	public static void PrintHashMultiBlock(byte[] input, int size)
	{
		SHA256Managed sha = new SHA256Managed();
		int offset = 0;

		while (input.Length - offset >= size)
			offset += sha.TransformBlock(input, offset, size, input, offset);

		sha.TransformFinalBlock(input, offset, input.Length - offset);
		Console.WriteLine("MultiBlock {0:00}: {1}", size, BytesToStr(sha.Hash));
	}

}

Imports System
Imports System.Text
Imports System.Security.Cryptography

Class Program

	Public Shared Sub Main()
		Dim rnd As RandomNumberGenerator = RandomNumberGenerator.Create
		Dim input() As Byte = New Byte((20) - 1) {}
		rnd.GetBytes(input)
		Console.WriteLine("Input        : {0}"& vbLf, BytesToStr(input))
		PrintHash(input)
		PrintHashOneBlock(input)
		PrintHashMultiBlock(input, 1)
		PrintHashMultiBlock(input, 2)
		PrintHashMultiBlock(input, 3)
		PrintHashMultiBlock(input, 5)
		PrintHashMultiBlock(input, 10)
		PrintHashMultiBlock(input, 11)
		PrintHashMultiBlock(input, 19)
		PrintHashMultiBlock(input, 20)
		PrintHashMultiBlock(input, 21)
	End Sub

	Public Shared Function BytesToStr(ByVal bytes() As Byte) As String
		Dim str As StringBuilder = New StringBuilder
		Dim i As Integer = 0
		Do While (i < bytes.Length)
		str.AppendFormat("{0:X2}", bytes(i))
		i = (i + 1)
		Loop
		Return str.ToString
	End Function

	Public Shared Sub PrintHash(ByVal input() As Byte)
		Dim sha As SHA256Managed = New SHA256Managed
		Console.WriteLine("ComputeHash  : {0}", BytesToStr(sha.ComputeHash(input)))
	End Sub

	Public Shared Sub PrintHashOneBlock(ByVal input() As Byte)
		Dim sha As SHA256Managed = New SHA256Managed
		sha.TransformFinalBlock(input, 0, input.Length)
		Console.WriteLine("FinalBlock   : {0}", BytesToStr(sha.Hash))
	End Sub

	Public Shared Sub PrintHashMultiBlock(ByVal input() As Byte, ByVal size As Integer)
		Dim sha As SHA256Managed = New SHA256Managed
		Dim offset As Integer = 0

		While ((input.Length - offset)  _
			>= size)
		offset = (offset + sha.TransformBlock(input, offset, size, input, offset))

		End While
		sha.TransformFinalBlock(input, offset, (input.Length - offset))
		Console.WriteLine("MultiBlock {0:00}: {1}", size, BytesToStr(sha.Hash))
	End Sub
End Class

Poznámky

Je třeba zavolat TransformBlock před voláním metody TransformFinalBlock metody.You must call the TransformBlock method before calling the TransformFinalBlock method. Obě metody musí volat před načtení poslední hodnoty hash hodnoty.You must call both methods before you retrieve the final hash value.

K načtení poslední hodnoty hash hodnoty po volání TransformFinalBlock metoda, získat bajtové pole obsažené Hash vlastnost.To retrieve the final hash value after calling the TransformFinalBlock method, get the byte array contained within the Hash property.

Volání TransformBlock metodu s jinou vstupní a výstupní pole vede IOException.Calling the TransformBlock method with different input and output arrays results in an IOException.

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