Create Method
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SymmetricAlgorithm::Create Method ()


Creates a default cryptographic object used to perform the symmetric algorithm.

Namespace:   System.Security.Cryptography
Assembly:  mscorlib (in mscorlib.dll)

static SymmetricAlgorithm^ Create()

Return Value

Type: System.Security.Cryptography::SymmetricAlgorithm^

A default cryptographic object used to perform the symmetric algorithm.

The following code example uses the RijndaelManaged class with the specified Key property and initialization vector (IV) to encrypt a file specified by inName, and outputs the encrypted result to the file specified by outName. The desKey and desIV parameters to the method are 8-byte arrays. You must have the high encryption pack installed to run this example.

void EncryptData( String^ inName, String^ outName, array<Byte>^rijnKey, array<Byte>^rijnIV )

   //Create the file streams to handle the input and output files.
   FileStream^ fin = gcnew FileStream( inName,FileMode::Open,FileAccess::Read );
   FileStream^ fout = gcnew FileStream( outName,FileMode::OpenOrCreate,FileAccess::Write );
   fout->SetLength( 0 );

   //Create variables to help with read and write.
   array<Byte>^bin = gcnew array<Byte>(100);
   long rdlen = 0; //This is the total number of bytes written.

   long totlen = (long)fin->Length; //This is the total length of the input file.

   int len; //This is the number of bytes to be written at a time.

   SymmetricAlgorithm^ rijn = SymmetricAlgorithm::Create(); //Creates the default implementation, which is RijndaelManaged.         

   CryptoStream^ encStream = gcnew CryptoStream( fout,rijn->CreateEncryptor( rijnKey, rijnIV ),CryptoStreamMode::Write );
   Console::WriteLine( "Encrypting..." );

   //Read from the input file, then encrypt and write to the output file.
   while ( rdlen < totlen )
      len = fin->Read( bin, 0, 100 );
      encStream->Write( bin, 0, len );
      rdlen = rdlen + len;
      Console::WriteLine( "{0} bytes processed", rdlen );


.NET Framework
Available since 1.1
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