RSAPKCS1SignatureDeformatter.SetHashAlgorithm メソッド
アセンブリ: mscorlib (mscorlib.dll 内)

Dim instance As RSAPKCS1SignatureDeformatter Dim strName As String instance.SetHashAlgorithm(strName)


RSAPKCS1SignatureFormatter クラスを使用してデジタル署名を作成した後、RSAPKCS1SignatureDeformatter クラスを使用してその署名を検証する方法を次のコード例に示します。
Imports System Imports System.Security.Cryptography _ Class RSASample Shared Sub Main() Try 'Create a new instance of RSACryptoServiceProvider. Dim RSA As New RSACryptoServiceProvider() '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 RSAOPKCS1SignatureFormatter object and pass it the 'RSACryptoServiceProvider to transfer the key information. Dim RSAFormatter As New RSAPKCS1SignatureFormatter(RSA) 'Set the hash algorithm to SHA1. RSAFormatter.SetHashAlgorithm("SHA1") 'Create a signature for HashValue and return it. Dim SignedHash As Byte() = RSAFormatter.CreateSignature(Hash) 'Create an RSAPKCS1SignatureDeformatter object and pass it the 'RSACryptoServiceProvider to transfer the key information. Dim RSADeformatter As New RSAPKCS1SignatureDeformatter(RSA) RSADeformatter.SetHashAlgorithm("SHA1") 'Verify the hash and display the results to the console. If RSADeformatter.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
using System; using System.Security.Cryptography; class RSASample { static void Main() { try { //Create a new instance of RSACryptoServiceProvider. RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); //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 RSAOPKCS1SignatureFormatter object and pass it the //RSACryptoServiceProvider to transfer the key information. RSAPKCS1SignatureFormatter RSAFormatter = new RSAPKCS1SignatureFormatter(RSA); //Set the hash algorithm to SHA1. RSAFormatter.SetHashAlgorithm("SHA1"); //Create a signature for HashValue and return it. byte[] SignedHash = RSAFormatter.CreateSignature(Hash); //Create an RSAPKCS1SignatureDeformatter object and pass it the //RSACryptoServiceProvider to transfer the key information. RSAPKCS1SignatureDeformatter RSADeformatter = new RSAPKCS1SignatureDeformatter(RSA); RSADeformatter.SetHashAlgorithm("SHA1"); //Verify the hash and display the results to the console. if(RSADeformatter.VerifySignature(Hash, SignedHash)) { Console.WriteLine("The signature was verified."); } else { Console.WriteLine("The signature was not verified."); } } catch(CryptographicException e) { Console.WriteLine(e.Message); } } }
#using <System.dll> using namespace System; using namespace System::Security::Cryptography; int main() { try { //Create a new instance of RSACryptoServiceProvider. RSACryptoServiceProvider^ RSA = gcnew RSACryptoServiceProvider; //The hash to sign. array<Byte>^Hash = {59,4,248,102,77,97,142,201,210,12,224,93,25,41,100 ,197,213,134,130,135}; //Create an RSAOPKCS1SignatureFormatter object and pass it the //RSACryptoServiceProvider to transfer the key information. RSAPKCS1SignatureFormatter^ RSAFormatter = gcnew RSAPKCS1SignatureFormatter( RSA ); //Set the hash algorithm to SHA1. RSAFormatter->SetHashAlgorithm( "SHA1" ); //Create a signature for HashValue and return it. array<Byte>^SignedHash = RSAFormatter->CreateSignature( Hash ); //Create an RSAPKCS1SignatureDeformatter object and pass it the //RSACryptoServiceProvider to transfer the key information. RSAPKCS1SignatureDeformatter^ RSADeformatter = gcnew RSAPKCS1SignatureDeformatter( RSA ); RSADeformatter->SetHashAlgorithm( "SHA1" ); //Verify the hash and display the results to the console. if ( RSADeformatter->VerifySignature( Hash, SignedHash ) ) { Console::WriteLine( "The signature was verified." ); } else { Console::WriteLine( "The signature was not verified." ); } } catch ( CryptographicException^ e ) { Console::WriteLine( e->Message ); } }
import System.*; import System.Security.Cryptography.*; class RSASample { public static void main(String[] args) { try { // Create a new instance of RSACryptoServiceProvider. RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); //The hash to sign. ubyte hash[] = {59, 4, 248, 102, 77, 97, 142, 201, 210, 12, 224, 93, 25, 41, 100, 197, 213, 134, 130, 135}; // Create an RSAOPKCS1SignatureFormatter object and pass it the // RSACryptoServiceProvider to transfer the key information. RSAPKCS1SignatureFormatter rsaFormatter = new RSAPKCS1SignatureFormatter(rsa); // Set the hash algorithm to SHA1. rsaFormatter.SetHashAlgorithm("SHA1"); // Create a signature for HashValue and return it. ubyte signedHash[] = rsaFormatter.CreateSignature(hash); // Create an RSAPKCS1SignatureDeformatter object and pass it the // RSACryptoServiceProvider to transfer the key information. RSAPKCS1SignatureDeformatter rsaDeformatter = new RSAPKCS1SignatureDeformatter(rsa); rsaDeformatter.SetHashAlgorithm("SHA1"); // Verify the hash and display the results to the console. if (rsaDeformatter.VerifySignature(hash, signedHash)) { Console.WriteLine("The signature was verified."); } else { Console.WriteLine("The signature was not verified."); } } catch (CryptographicException e) { Console.WriteLine(e.get_Message()); } } //main } //RSASample

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
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