DSASignatureDeformatter.SetHashAlgorithm(String) メソッド

定義

名前空間:
System.Security.Cryptography
アセンブリ:
netstandard.dll, System.Security.Cryptography.dll
アセンブリ:
netstandard.dll, System.Security.Cryptography.Algorithms.dll
アセンブリ:
System.Security.Cryptography.Algorithms.dll
アセンブリ:
mscorlib.dll
アセンブリ:
netstandard.dll
ソース:
DSASignatureDeformatter.cs
ソース:
DSASignatureDeformatter.cs
ソース:
DSASignatureDeformatter.cs
ソース:
DSASignatureDeformatter.cs
ソース:
DSASignatureDeformatter.cs

デジタル署名アルゴリズム (DSA) 署名の変形のハッシュ アルゴリズムを指定します。

public:
 override void SetHashAlgorithm(System::String ^ strName);
public override void SetHashAlgorithm(string strName);
override this.SetHashAlgorithm : string -> unit
Public Overrides Sub SetHashAlgorithm (strName As String)

パラメーター

strName
String

署名の変形に使用するハッシュ アルゴリズムの名前。

例外

CryptographicUnexpectedOperationException

strName パラメーターは、SHA1 ハッシュ アルゴリズムにマップされません。

例

using System;
using System.Security.Cryptography;

class DSASample
{
        
    static void Main()
    {
        try
        {
            //Create a new instance of DSA.
            DSA DSA = DSA.Create();

            //The hash to sign.
            byte[] Hash = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100,197,213,134,130,135};

            //Create an DSASignatureFormatter object and pass it the 
            //DSA instance to transfer the key information.
            DSASignatureFormatter DSAFormatter = new DSASignatureFormatter(DSA);

            //Set the hash algorithm to SHA1.
            DSAFormatter.SetHashAlgorithm("SHA1");

            //Create a signature for HashValue and return it.
            byte[] SignedHash = DSAFormatter.CreateSignature(Hash);

            //Create an DSASignatureDeformatter object and pass it the 
            //DSA instance to transfer the key information.
            DSASignatureDeformatter DSADeformatter = new DSASignatureDeformatter(DSA);

            //Verify the hash and display the results to the console.
            if(DSADeformatter.VerifySignature(Hash, SignedHash))
            {
                Console.WriteLine("The signature was verified.");
            }
            else
            {
                Console.WriteLine("The signature was not verified.");
            }
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);
        }
    }
}

Imports System.Security.Cryptography

 _

Class DSASample


    Shared Sub Main()
        Try
            'Create a new instance of DSA.
            Dim DSA As DSA = DSA.Create()

            'The hash to sign.
            Dim Hash As Byte() = {59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 224, 93, 25, 41, 100, 197, 213, 134, 130, 135}

            'Create an DSASignatureFormatter object and pass it the 
            'DSA instance to transfer the key information.
            Dim DSAFormatter As New DSASignatureFormatter(DSA)

            'Set the hash algorithm to SHA1.
            DSAFormatter.SetHashAlgorithm("SHA1")

            'Create a signature for HashValue and return it.
            Dim SignedHash As Byte() = DSAFormatter.CreateSignature(Hash)

            'Create an DSASignatureDeformatter object and pass it the 
            'DSA instance to transfer the key information.
            Dim DSADeformatter As New DSASignatureDeformatter(DSA)

            'Verify the hash and display the results to the console.
            If DSADeformatter.VerifySignature(Hash, SignedHash) Then
                Console.WriteLine("The signature was verified.")
            Else
                Console.WriteLine("The signature was not verified.")
            End If

        Catch e As CryptographicException
            Console.WriteLine(e.Message)
        End Try
    End Sub
End Class

注意 (継承者)

このメソッドは使用されません。 DSA アルゴリズムには、SHA1 ハッシュ アルゴリズムが必要です。

適用対象

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