DSASignatureDeformatter 建構函式
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
初始化 DSASignatureDeformatter 類別的新執行個體。
多載
| 名稱 | Description |
|---|---|
| DSASignatureDeformatter() |
初始化 DSASignatureDeformatter 類別的新執行個體。 |
| DSASignatureDeformatter(AsymmetricAlgorithm) |
初始化一個新的類別實例 DSASignatureDeformatter ，使用指定的鍵值。 |
DSASignatureDeformatter()
初始化 DSASignatureDeformatter 類別的新執行個體。
public:
DSASignatureDeformatter();public DSASignatureDeformatter();Public Sub New ()範例
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
另請參閱
適用於
DSASignatureDeformatter(AsymmetricAlgorithm)
初始化一個新的類別實例 DSASignatureDeformatter ，使用指定的鍵值。
public:
DSASignatureDeformatter(System::Security::Cryptography::AsymmetricAlgorithm ^ key);public DSASignatureDeformatter(System.Security.Cryptography.AsymmetricAlgorithm key);new System.Security.Cryptography.DSASignatureDeformatter : System.Security.Cryptography.AsymmetricAlgorithm -> System.Security.Cryptography.DSASignatureDeformatterPublic Sub New (key As AsymmetricAlgorithm)參數
持有鑰匙的數位簽章演算法實DSA例（）。
例外狀況
key 是 null。
