RSACryptoServiceProvider.SignData Metodo

Riferimento

Definizione

Spazio dei nomi:: System.Security.Cryptography

Assembly:: System.Security.Cryptography.Csp.dll

Assembly:: System.Security.Cryptography.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Importante

Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.

Calcola il valore hash dei dati specificati e lo firma.

Overload

SignData(Byte[], Object)	Calcola il valore hash della matrice di byte specificata usando l'algoritmo hash specificato e firma il valore hash risultante.
SignData(Stream, Object)	Calcola il valore hash del flusso di input specificato usando l'algoritmo hash specificato e firma il valore hash risultante.
SignData(Byte[], Int32, Int32, Object)	Calcola il valore hash di un subset della matrice di byte specificata usando l'algoritmo hash specificato e firma il valore hash risultante.

SignData(Byte[], Object)

Origine:: RSACryptoServiceProvider.Unix.cs

Origine:: RSACryptoServiceProvider.Unix.cs

Origine:: RSACryptoServiceProvider.Unix.cs

Calcola il valore hash della matrice di byte specificata usando l'algoritmo hash specificato e firma il valore hash risultante.

public:
 cli::array <System::Byte> ^ SignData(cli::array <System::Byte> ^ buffer, System::Object ^ halg);

public byte[] SignData (byte[] buffer, object halg);

override this.SignData : byte[] * obj -> byte[]

member this.SignData : byte[] * obj -> byte[]

Public Function SignData (buffer As Byte(), halg As Object) As Byte()

Parametri

buffer: Byte[]

Dati di input per hash e firma.

halg: Object

Algoritmo hash da usare per creare il valore hash.

Restituisce

Byte[]

Firma RSA per i dati specificati.

Eccezioni

ArgumentNullException

Il valore del parametro halg è null.

ArgumentException

Il parametro halg non è un tipo valido.

Esempio

L'esempio di codice seguente firma e verifica i dati.

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
array<Byte>^ HashAndSignBytes( array<Byte>^DataToSign, RSAParameters Key )
{
   try
   {
      
      // Create a new instance of RSACryptoServiceProvider using the 
      // key from RSAParameters.  
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
      RSAalg->ImportParameters( Key );
      
      // Hash and sign the data. Pass a new instance of SHA256
      // to specify the hashing algorithm.
      return RSAalg->SignData( DataToSign, SHA256::Create() );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

bool VerifySignedHash( array<Byte>^DataToVerify, array<Byte>^SignedData, RSAParameters Key )
{
   try
   {
      
      // Create a new instance of RSACryptoServiceProvider using the 
      // key from RSAParameters.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
      RSAalg->ImportParameters( Key );
      
      // Verify the data using the signature.  Pass a new instance of SHA256
      // to specify the hashing algorithm.
      return RSAalg->VerifyData( DataToVerify, SHA256::Create(), SignedData );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return false;
   }

}

int main()
{
   try
   {
      
      // Create a UnicodeEncoder to convert between byte array and string.
      ASCIIEncoding^ ByteConverter = gcnew ASCIIEncoding;
      String^ dataString = "Data to Sign";
      
      // Create byte arrays to hold original, encrypted, and decrypted data.
      array<Byte>^originalData = ByteConverter->GetBytes( dataString );
      array<Byte>^signedData;
      
      // Create a new instance of the RSACryptoServiceProvider class 
      // and automatically create a new key-pair.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
      
      // Export the key information to an RSAParameters object.
      // You must pass true to export the private key for signing.
      // However, you do not need to export the private key
      // for verification.
      RSAParameters Key = RSAalg->ExportParameters( true );
      
      // Hash and sign the data.
      signedData = HashAndSignBytes( originalData, Key );
      
      // Verify the data and display the result to the 
      // console.
      if ( VerifySignedHash( originalData, signedData, Key ) )
      {
         Console::WriteLine( "The data was verified." );
      }
      else
      {
         Console::WriteLine( "The data does not match the signature." );
      }
   }
   catch ( ArgumentNullException^ ) 
   {
      Console::WriteLine( "The data was not signed or verified" );
   }

}

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

class RSACSPSample
{
    static void Main()
    {
        try
        {
            // Create a UnicodeEncoder to convert between byte array and string.
            ASCIIEncoding ByteConverter = new ASCIIEncoding();

            string dataString = "Data to Sign";

            // Create byte arrays to hold original, encrypted, and decrypted data.
            byte[] originalData = ByteConverter.GetBytes(dataString);
            byte[] signedData;

            // Create a new instance of the RSACryptoServiceProvider class
            // and automatically create a new key-pair.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            // Export the key information to an RSAParameters object.
            // You must pass true to export the private key for signing.
            // However, you do not need to export the private key
            // for verification.
            RSAParameters Key = RSAalg.ExportParameters(true);

            // Hash and sign the data.
            signedData = HashAndSignBytes(originalData, Key);

            // Verify the data and display the result to the
            // console.
            if(VerifySignedHash(originalData, signedData, Key))
            {
                Console.WriteLine("The data was verified.");
            }
            else
            {
                Console.WriteLine("The data does not match the signature.");
            }
        }
        catch(ArgumentNullException)
        {
            Console.WriteLine("The data was not signed or verified");
        }
    }
    public static byte[] HashAndSignBytes(byte[] DataToSign, RSAParameters Key)
    {
        try
        {
            // Create a new instance of RSACryptoServiceProvider using the
            // key from RSAParameters.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            RSAalg.ImportParameters(Key);

            // Hash and sign the data. Pass a new instance of SHA256
            // to specify the hashing algorithm.
            return RSAalg.SignData(DataToSign, SHA256.Create());
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }
    }

    public static bool VerifySignedHash(byte[] DataToVerify, byte[] SignedData, RSAParameters Key)
    {
        try
        {
            // Create a new instance of RSACryptoServiceProvider using the
            // key from RSAParameters.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            RSAalg.ImportParameters(Key);

            // Verify the data using the signature.  Pass a new instance of SHA256
            // to specify the hashing algorithm.
            return RSAalg.VerifyData(DataToVerify, SHA256.Create(), SignedData);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return false;
        }
    }
}

Imports System.Security.Cryptography
Imports System.Text

Module RSACSPExample

    Sub Main()
        Try
            ' Create a UnicodeEncoder to convert between byte array and string.
            Dim ByteConverter As New ASCIIEncoding

            Dim dataString As String = "Data to Sign"

            ' Create byte arrays to hold original, encrypted, and decrypted data.
            Dim originalData As Byte() = ByteConverter.GetBytes(dataString)
            Dim signedData() As Byte

            ' Create a new instance of the RSACryptoServiceProvider class 
            ' and automatically create a new key-pair.
            Dim RSAalg As New RSACryptoServiceProvider

            ' Export the key information to an RSAParameters object.
            ' You must pass true to export the private key for signing.
            ' However, you do not need to export the private key
            ' for verification.
            Dim Key As RSAParameters = RSAalg.ExportParameters(True)

            ' Hash and sign the data.
            signedData = HashAndSignBytes(originalData, Key)

            ' Verify the data and display the result to the 
            ' console.
            If VerifySignedHash(originalData, signedData, Key) Then
                Console.WriteLine("The data was verified.")
            Else
                Console.WriteLine("The data does not match the signature.")
            End If

        Catch e As ArgumentNullException
            Console.WriteLine("The data was not signed or verified.")
        End Try
    End Sub

    Function HashAndSignBytes(ByVal DataToSign() As Byte, ByVal Key As RSAParameters) As Byte()
        Try
            ' Create a new instance of RSACryptoServiceProvider using the 
            ' key from RSAParameters.  
            Dim RSAalg As New RSACryptoServiceProvider

            RSAalg.ImportParameters(Key)

            ' Hash and sign the data. Pass a new instance of SHA256
            ' to specify the hashing algorithm.
            Return RSAalg.SignData(DataToSign, SHA256.Create())
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function


    Function VerifySignedHash(ByVal DataToVerify() As Byte, ByVal SignedData() As Byte, ByVal Key As RSAParameters) As Boolean
        Try
            ' Create a new instance of RSACryptoServiceProvider using the 
            ' key from RSAParameters.
            Dim RSAalg As New RSACryptoServiceProvider

            RSAalg.ImportParameters(Key)

            ' Verify the data using the signature.  Pass a new instance of SHA256
            ' to specify the hashing algorithm.
            Return RSAalg.VerifyData(DataToVerify, SHA256.Create(), SignedData)

        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return False
        End Try
    End Function
End Module

Commenti

Questo metodo crea una firma digitale verificata usando il VerifyData metodo .

Il halg parametro può accettare un Stringoggetto , un HashAlgorithmoggetto o un oggetto Type.

Vedi anche

Si applica a

SignData(Stream, Object)

Origine:: RSACryptoServiceProvider.Unix.cs

Origine:: RSACryptoServiceProvider.Unix.cs

Origine:: RSACryptoServiceProvider.Unix.cs

Calcola il valore hash del flusso di input specificato usando l'algoritmo hash specificato e firma il valore hash risultante.

public:
 cli::array <System::Byte> ^ SignData(System::IO::Stream ^ inputStream, System::Object ^ halg);

public byte[] SignData (System.IO.Stream inputStream, object halg);

override this.SignData : System.IO.Stream * obj -> byte[]

member this.SignData : System.IO.Stream * obj -> byte[]

Public Function SignData (inputStream As Stream, halg As Object) As Byte()

Parametri

inputStream: Stream

Flusso di input per hash e firma.

halg: Object

Algoritmo hash da usare per creare il valore hash.

Restituisce

Byte[]

Firma RSA per i dati specificati.

Eccezioni

ArgumentNullException

Il valore del parametro halg è null.

ArgumentException

Il parametro halg non è un tipo valido.

Esempio

L'esempio di codice seguente firma e verifica i dati.

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
using namespace System::IO;
array<Byte>^ HashAndSignBytes( Stream^ DataStream, RSAParameters Key )
{
   try
   {
      
      // Reset the current position in the stream to 
      // the beginning of the stream (0). RSACryptoServiceProvider
      // can't verify the data unless the stream position
      // is set to the starting position of the data.
      DataStream->Position = 0;
      
      // Create a new instance of RSACryptoServiceProvider using the 
      // key from RSAParameters.  
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
      RSAalg->ImportParameters( Key );
      
      // Hash and sign the data. Pass a new instance of SHA256
      // to specify the hashing algorithm.
      return RSAalg->SignData( DataStream, SHA256::Create() );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

bool VerifySignedHash( array<Byte>^DataToVerify, array<Byte>^SignedData, RSAParameters Key )
{
   try
   {
      
      // Create a new instance of RSACryptoServiceProvider using the 
      // key from RSAParameters.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
      RSAalg->ImportParameters( Key );
      
      // Verify the data using the signature.  Pass a new instance of SHA256
      // to specify the hashing algorithm.
      return RSAalg->VerifyData( DataToVerify, SHA256(), SignedData );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return false;
   }

}

int main()
{
   try
   {
      ASCIIEncoding^ ByteConverter = gcnew ASCIIEncoding;
      
      // Create some bytes to be signed.
      array<Byte>^dataBytes = ByteConverter->GetBytes( "Here is some data to sign!" );
      
      // Create a buffer for the memory stream.
      array<Byte>^buffer = gcnew array<Byte>(dataBytes->Length);
      
      // Create a MemoryStream.
      MemoryStream^ mStream = gcnew MemoryStream( buffer );
      
      // Write the bytes to the stream and flush it.
      mStream->Write( dataBytes, 0, dataBytes->Length );
      mStream->Flush();
      
      // Create a new instance of the RSACryptoServiceProvider class 
      // and automatically create a new key-pair.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
      
      // Export the key information to an RSAParameters object.
      // You must pass true to export the private key for signing.
      // However, you do not need to export the private key
      // for verification.
      RSAParameters Key = RSAalg->ExportParameters( true );
      
      // Hash and sign the data.
      array<Byte>^signedData = HashAndSignBytes( mStream, Key );
      
      // Verify the data and display the result to the 
      // console.
      if ( VerifySignedHash( dataBytes, signedData, Key ) )
      {
         Console::WriteLine( "The data was verified." );
      }
      else
      {
         Console::WriteLine( "The data does not match the signature." );
      }
      
      // Close the MemoryStream.
      mStream->Close();
   }
   catch ( ArgumentNullException^ ) 
   {
      Console::WriteLine( "The data was not signed or verified" );
   }

}

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

class RSACSPSample
{
    static void Main()
    {
        try
        {
            ASCIIEncoding ByteConverter = new ASCIIEncoding();

            // Create some bytes to be signed.
            byte[] dataBytes = ByteConverter.GetBytes("Here is some data to sign!");

            // Create a buffer for the memory stream.
            byte[] buffer = new byte[dataBytes.Length];

            // Create a MemoryStream.
            MemoryStream mStream = new MemoryStream(buffer);

            // Write the bytes to the stream and flush it.
            mStream.Write(dataBytes, 0, dataBytes.Length);

            mStream.Flush();

            // Create a new instance of the RSACryptoServiceProvider class
            // and automatically create a new key-pair.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            // Export the key information to an RSAParameters object.
            // You must pass true to export the private key for signing.
            // However, you do not need to export the private key
            // for verification.
            RSAParameters Key = RSAalg.ExportParameters(true);

            // Hash and sign the data.
            byte[] signedData = HashAndSignBytes(mStream, Key);

            // Verify the data and display the result to the
            // console.
            if(VerifySignedHash(dataBytes, signedData, Key))
            {
                Console.WriteLine("The data was verified.");
            }
            else
            {
                Console.WriteLine("The data does not match the signature.");
            }

            // Close the MemoryStream.
            mStream.Close();
        }
        catch(ArgumentNullException)
        {
            Console.WriteLine("The data was not signed or verified");
        }
    }
    public static byte[] HashAndSignBytes(Stream DataStream, RSAParameters Key)
    {
        try
        {
            // Reset the current position in the stream to
            // the beginning of the stream (0). RSACryptoServiceProvider
            // can't verify the data unless the stream position
            // is set to the starting position of the data.
            DataStream.Position = 0;

            // Create a new instance of RSACryptoServiceProvider using the
            // key from RSAParameters.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            RSAalg.ImportParameters(Key);

            // Hash and sign the data. Pass a new instance of SHA256
            // to specify the hashing algorithm.
            return RSAalg.SignData(DataStream, SHA256.Create());
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }
    }

    public static bool VerifySignedHash(byte[] DataToVerify, byte[] SignedData, RSAParameters Key)
    {
        try
        {
            // Create a new instance of RSACryptoServiceProvider using the
            // key from RSAParameters.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            RSAalg.ImportParameters(Key);

            // Verify the data using the signature.  Pass a new instance of SHA256
            // to specify the hashing algorithm.
            return RSAalg.VerifyData(DataToVerify, SHA256.Create(), SignedData);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return false;
        }
    }
}

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

Module RSACSPExample

    Sub Main()
        Try
            Dim ByteConverter As New ASCIIEncoding

            ' Create some bytes to be signed.
            Dim dataBytes As Byte() = ByteConverter.GetBytes("Here is some data to sign!")

            ' Create a buffer for the memory stream.
            ' VB automatically pads arrays with an extra 
            ' Digit of "0".
            ' RSACryptoServiceProvider will not verify
            ' the buffer if the automatic padding is 
            ' present.  To remove the padding, decrement
            ' the buffer length by 1.
            Dim buffer(dataBytes.Length - 1) As Byte

            ' Create a MemoryStream.
            Dim mStream As New MemoryStream(buffer)

            ' Write the bytes to the stream and flush it.
            mStream.Write(dataBytes, 0, dataBytes.Length)

            mStream.Flush()

            ' Create a new instance of the RSACryptoServiceProvider class 
            ' and automatically create a new key-pair.
            Dim RSAalg As New RSACryptoServiceProvider

            ' Export the key information to an RSAParameters object.
            ' You must pass true to export the private key for signing.
            ' However, you do not need to export the private key
            ' for verification.
            Dim Key As RSAParameters = RSAalg.ExportParameters(True)

            ' Hash and sign the data.
            Dim signedData As Byte() = HashAndSignBytes(mStream, Key)


            ' Verify the data and display the result to the 
            ' console.
            If VerifySignedHash(dataBytes, signedData, Key) Then
                Console.WriteLine("The data was verified.")
            Else
                Console.WriteLine("The data does not match the signature.")
            End If

            ' Close the MemoryStream.
            mStream.Close()

        Catch e As ArgumentNullException
            Console.WriteLine("The data was not signed or verified")
        End Try
    End Sub 

    Function HashAndSignBytes(ByVal DataStream As Stream, ByVal Key As RSAParameters) As Byte()
        Try
            ' Reset the current position in the stream to 
            ' the beginning of the stream (0). RSACryptoServiceProvider
            ' can't verify the data unless the stream position
            ' is set to the starting position of the data.
            DataStream.Position = 0

            ' Create a new instance of RSACryptoServiceProvider using the 
            ' key from RSAParameters.  
            Dim RSAalg As New RSACryptoServiceProvider

            RSAalg.ImportParameters(Key)

            ' Hash and sign the data. Pass a new instance of SHA256
            ' to specify the hashing algorithm.
            Return RSAalg.SignData(DataStream, SHA256.Create())
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function 


    Function VerifySignedHash(ByVal DataToVerify() As Byte, ByVal SignedData() As Byte, ByVal Key As RSAParameters) As Boolean
        Try
            ' Create a new instance of RSACryptoServiceProvider using the 
            ' key from RSAParameters.
            Dim RSAalg As New RSACryptoServiceProvider

            RSAalg.ImportParameters(Key)

            ' Verify the data using the signature.  Pass a new instance of SHA256
            ' to specify the hashing algorithm.
            Return RSAalg.VerifyData(DataToVerify, SHA256.Create(), SignedData)

        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return False
        End Try
    End Function 
End Module

Commenti

Il halg parametro può accettare un Stringoggetto , un HashAlgorithmoggetto o un oggetto Type.

Vedi anche

Si applica a

SignData(Byte[], Int32, Int32, Object)

Origine:: RSACryptoServiceProvider.Unix.cs

Origine:: RSACryptoServiceProvider.Unix.cs

Origine:: RSACryptoServiceProvider.Unix.cs

Calcola il valore hash di un subset della matrice di byte specificata usando l'algoritmo hash specificato e firma il valore hash risultante.

public:
 cli::array <System::Byte> ^ SignData(cli::array <System::Byte> ^ buffer, int offset, int count, System::Object ^ halg);

public byte[] SignData (byte[] buffer, int offset, int count, object halg);

override this.SignData : byte[] * int * int * obj -> byte[]

member this.SignData : byte[] * int * int * obj -> byte[]

Public Function SignData (buffer As Byte(), offset As Integer, count As Integer, halg As Object) As Byte()

Parametri

buffer: Byte[]

Dati di input per hash e firma.

offset: Int32

Offset nella matrice dal quale iniziare a usare i dati.

count: Int32

Numero di byte nella matrice da usare come dati.

halg: Object

Algoritmo hash da usare per creare il valore hash.

Restituisce

Byte[]

Firma RSA per i dati specificati.

Eccezioni

ArgumentNullException

Il valore del parametro halg è null.

ArgumentException

Il parametro halg non è un tipo valido.

Esempio

L'esempio di codice seguente firma e verifica i dati.

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
array<Byte>^ HashAndSignBytes( array<Byte>^DataToSign, RSAParameters Key, int Index, int Length )
{
   try
   {
      
      // Create a new instance of RSACryptoServiceProvider using the 
      // key from RSAParameters.  
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
      RSAalg->ImportParameters( Key );
      
      // Hash and sign the data. Pass a new instance of SHA256
      // to specify the hashing algorithm.
      return RSAalg->SignData( DataToSign, Index, Length, SHA256::Create() );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return nullptr;
   }

}

bool VerifySignedHash( array<Byte>^DataToVerify, array<Byte>^SignedData, RSAParameters Key )
{
   try
   {
      
      // Create a new instance of RSACryptoServiceProvider using the 
      // key from RSAParameters.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
      RSAalg->ImportParameters( Key );
      
      // Verify the data using the signature.  Pass a new instance of SHA256
      // to specify the hashing algorithm.
      return RSAalg->VerifyData( DataToVerify, SHA256::Create(), SignedData );
   }
   catch ( CryptographicException^ e ) 
   {
      Console::WriteLine( e->Message );
      return false;
   }

}

int main()
{
   try
   {
      
      // Create a UnicodeEncoder to convert between byte array and string.
      ASCIIEncoding^ ByteConverter = gcnew ASCIIEncoding;
      String^ dataString = "Data to Sign";
      
      // Create byte arrays to hold original, encrypted, and decrypted data.
      array<Byte>^originalData = ByteConverter->GetBytes( dataString );
      array<Byte>^signedData;
      array<Byte>^smallArray;
      
      // Create a new instance of the RSACryptoServiceProvider class 
      // and automatically create a new key-pair.
      RSACryptoServiceProvider^ RSAalg = gcnew RSACryptoServiceProvider;
      
      // Export the key information to an RSAParameters object.
      // You must pass true to export the private key for signing.
      // However, you do not need to export the private key
      // for verification.
      RSAParameters Key = RSAalg->ExportParameters( true );
      
      // Hash and sign the data.  Start at the fifth offset
      // only use data from the next 7 bytes.
      signedData = HashAndSignBytes( originalData, Key, 5, 7 );
      
      // The previous method only signed one segment
      // of the array.  Create a new array for verification
      // that only holds the data that was actually signed.
      //
      // Initialize the array.
      smallArray = gcnew array<Byte>(7);
      
      // Copy 7 bytes starting at the 5th index to 
      // the new array.
      Array::Copy( originalData, 5, smallArray, 0, 7 );
      
      // Verify the data and display the result to the 
      // console.  
      if ( VerifySignedHash( smallArray, signedData, Key ) )
      {
         Console::WriteLine( "The data was verified." );
      }
      else
      {
         Console::WriteLine( "The data does not match the signature." );
      }
   }
   catch ( ArgumentNullException^ ) 
   {
      Console::WriteLine( "The data was not signed or verified" );
   }

}

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

class RSACSPSample
{
    static void Main()
    {
        try
        {
            // Create a UnicodeEncoder to convert between byte array and string.
            ASCIIEncoding ByteConverter = new ASCIIEncoding();

            string dataString = "Data to Sign";

            // Create byte arrays to hold original, encrypted, and decrypted data.
            byte[] originalData = ByteConverter.GetBytes(dataString);
            byte[] signedData;
            byte[] smallArray;

            // Create a new instance of the RSACryptoServiceProvider class
            // and automatically create a new key-pair.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            // Export the key information to an RSAParameters object.
            // You must pass true to export the private key for signing.
            // However, you do not need to export the private key
            // for verification.
            RSAParameters Key = RSAalg.ExportParameters(true);

            // Hash and sign the data.  Start at the fifth offset
            // only use data from the next 7 bytes.
            signedData = HashAndSignBytes(originalData, Key, 5, 7 );

            // The previous method only signed one segment
            // of the array.  Create a new array for verification
            // that only holds the data that was actually signed.
            //
            // Initialize the array.
            smallArray = new byte[7];
            // Copy 7 bytes starting at the 5th index to
            // the new array.
            Array.Copy(originalData, 5 , smallArray, 0, 7);

            // Verify the data and display the result to the
            // console.
            if(VerifySignedHash(smallArray, signedData, Key))
            {
                Console.WriteLine("The data was verified.");
            }
            else
            {
                Console.WriteLine("The data does not match the signature.");
            }
        }
        catch(ArgumentNullException)
        {
            Console.WriteLine("The data was not signed or verified");
        }
    }
    public static byte[] HashAndSignBytes(byte[] DataToSign, RSAParameters Key, int Index, int Length)
    {
        try
        {
            // Create a new instance of RSACryptoServiceProvider using the
            // key from RSAParameters.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            RSAalg.ImportParameters(Key);

            // Hash and sign the data. Pass a new instance of SHA256
            // to specify the hashing algorithm.
            return RSAalg.SignData(DataToSign,Index,Length, SHA256.Create());
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return null;
        }
    }

    public static bool VerifySignedHash(byte[] DataToVerify, byte[] SignedData, RSAParameters Key)
    {
        try
        {
            // Create a new instance of RSACryptoServiceProvider using the
            // key from RSAParameters.
            RSACryptoServiceProvider RSAalg = new RSACryptoServiceProvider();

            RSAalg.ImportParameters(Key);

            // Verify the data using the signature.  Pass a new instance of SHA256
            // to specify the hashing algorithm.
            return RSAalg.VerifyData(DataToVerify, SHA256.Create(), SignedData);
        }
        catch(CryptographicException e)
        {
            Console.WriteLine(e.Message);

            return false;
        }
    }
}

Imports System.Security.Cryptography
Imports System.Text

Module RSACSPExample

    Sub Main()
        Try
            ' Create a UnicodeEncoder to convert between byte array and string.
            Dim ByteConverter As New ASCIIEncoding

            Dim dataString As String = "Data to Sign"

            ' Create byte arrays to hold original, encrypted, and decrypted data.
            Dim originalData As Byte() = ByteConverter.GetBytes(dataString)
            Dim signedData() As Byte
            Dim smallArray() As Byte

            ' Create a new instance of the RSACryptoServiceProvider class 
            ' and automatically create a new key-pair.
            Dim RSAalg As New RSACryptoServiceProvider

            ' Export the key information to an RSAParameters object.
            ' You must pass true to export the private key for signing.
            ' However, you do not need to export the private key
            ' for verification.
            Dim Key As RSAParameters = RSAalg.ExportParameters(True)

            ' Hash and sign the data.  Start at the fifth offset
            ' only use data from the next 7 bytes.
            signedData = HashAndSignBytes(originalData, Key, 5, 7)

            ' The previous function only signed one segment
            ' of the array.  Create a new array for verification
            ' that only holds the data that was actually signed.
            '
            ' Initialize the array.
            smallArray = New Byte(6) {}
            ' Copy 7 bytes starting at the 5th index to 
            ' the new array.
            Array.Copy(originalData, 5, smallArray, 0, 7)

            ' Verify the data and display the result to the 
            ' console.  
            If VerifySignedHash(smallArray, signedData, Key) Then
                Console.WriteLine("The data was verified.")
            Else
                Console.WriteLine("The data does not match the signature.")
            End If

        Catch e As ArgumentNullException
            Console.WriteLine("The data was not signed or verified")
        End Try
    End Sub

    Function HashAndSignBytes(ByVal DataToSign() As Byte, ByVal Key As RSAParameters, ByVal Index As Integer, ByVal Length As Integer) As Byte()
        Try
            ' Create a new instance of RSACryptoServiceProvider using the 
            ' key from RSAParameters.  
            Dim RSAalg As New RSACryptoServiceProvider

            RSAalg.ImportParameters(Key)

            ' Hash and sign the data. Pass a new instance of SHA256
            ' to specify the hashing algorithm.
            Return RSAalg.SignData(DataToSign, Index, Length, SHA256.Create())
        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return Nothing
        End Try
    End Function


    Function VerifySignedHash(ByVal DataToVerify() As Byte, ByVal SignedData() As Byte, ByVal Key As RSAParameters) As Boolean
        Try
            ' Create a new instance of RSACryptoServiceProvider using the 
            ' key from RSAParameters.
            Dim RSAalg As New RSACryptoServiceProvider

            RSAalg.ImportParameters(Key)

            ' Verify the data using the signature.  Pass a new instance of SHA256
            ' to specify the hashing algorithm.
            Return RSAalg.VerifyData(DataToVerify, SHA256.Create(), SignedData)

        Catch e As CryptographicException
            Console.WriteLine(e.Message)

            Return False
        End Try
    End Function
End Module

Commenti

Questo metodo crea una firma digitale verificata usando il VerifyData metodo .

Il halg parametro può accettare un Stringoggetto , un HashAlgorithmoggetto o un oggetto Type. Il valore stringa può essere uno dei seguenti:

Nome descrittivo dell'identificatore di oggetto (OID) dell'algoritmo hash da usare, un nome registrato nel file di configurazione di crittografia o uno nella tabella OID dell'API crypto.
La durata (OID). L'OID deve essere riconosciuto dall'API Crypto.

Ad esempio, è possibile usare SignData(new byte[5], "1.3.14.3.2.26") o SignData(new byte[5], "sha1") o SignData(new byte[5], "SHA1").

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Si applica a

Condividi tramite

RSACryptoServiceProvider.SignData Metodo

Definizione

Overload

SignData(Byte[], Object)

Parametri

Restituisce

Eccezioni

Esempio

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SignData(Stream, Object)

Parametri

Restituisce

Eccezioni

Esempio

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Si applica a

SignData(Byte[], Int32, Int32, Object)

Parametri

Restituisce

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Esempio

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Si applica a

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