TripleDESCryptoServiceProvider 類別
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。
警告
Derived cryptographic types are obsolete. Use the Create method on the base type instead.
定義包裝函式物件，以存取 TripleDES 演算法的密碼編譯服務供應者 (CSP) 版本。 此類別無法獲得繼承。
public ref class TripleDESCryptoServiceProvider sealed : System::Security::Cryptography::TripleDESpublic sealed class TripleDESCryptoServiceProvider : System.Security.Cryptography.TripleDES[System.Obsolete("Derived cryptographic types are obsolete. Use the Create method on the base type instead.", DiagnosticId="SYSLIB0021", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public sealed class TripleDESCryptoServiceProvider : System.Security.Cryptography.TripleDES[System.Runtime.InteropServices.ComVisible(true)]
public sealed class TripleDESCryptoServiceProvider : System.Security.Cryptography.TripleDEStype TripleDESCryptoServiceProvider = class
inherit TripleDES[<System.Obsolete("Derived cryptographic types are obsolete. Use the Create method on the base type instead.", DiagnosticId="SYSLIB0021", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
type TripleDESCryptoServiceProvider = class
inherit TripleDES[<System.Runtime.InteropServices.ComVisible(true)>]
type TripleDESCryptoServiceProvider = class
inherit TripleDESPublic NotInheritable Class TripleDESCryptoServiceProvider
Inherits TripleDES- 繼承
- 屬性
範例
下列程式碼範例會 TripleDESCryptoServiceProvider 建立 物件，並使用它來加密和解密檔案中的資料。
using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
using namespace System::IO;
void EncryptTextToFile( String^ Data, String^ FileName, array<Byte>^Key, array<Byte>^IV )
{
try
{
// Create or open the specified file.
FileStream^ fStream = File::Open( FileName, FileMode::OpenOrCreate );
// Create a CryptoStream using the FileStream
// and the passed key and initialization vector (IV).
CryptoStream^ cStream = gcnew CryptoStream( fStream,(gcnew TripleDESCryptoServiceProvider)->CreateEncryptor( Key, IV ),CryptoStreamMode::Write );
// Create a StreamWriter using the CryptoStream.
StreamWriter^ sWriter = gcnew StreamWriter( cStream );
// Write the data to the stream
// to encrypt it.
sWriter->WriteLine( Data );
// Close the streams and
// close the file.
sWriter->Close();
cStream->Close();
fStream->Close();
}
catch ( CryptographicException^ e )
{
Console::WriteLine( "A Cryptographic error occurred: {0}", e->Message );
}
catch ( UnauthorizedAccessException^ e )
{
Console::WriteLine( "A file access error occurred: {0}", e->Message );
}
}
String^ DecryptTextFromFile( String^ FileName, array<Byte>^Key, array<Byte>^IV )
{
try
{
// Create or open the specified file.
FileStream^ fStream = File::Open( FileName, FileMode::OpenOrCreate );
// Create a CryptoStream using the FileStream
// and the passed key and initialization vector (IV).
CryptoStream^ cStream = gcnew CryptoStream( fStream,(gcnew TripleDESCryptoServiceProvider)->CreateDecryptor( Key, IV ),CryptoStreamMode::Read );
// Create a StreamReader using the CryptoStream.
StreamReader^ sReader = gcnew StreamReader( cStream );
// Read the data from the stream
// to decrypt it.
String^ val = sReader->ReadLine();
// Close the streams and
// close the file.
sReader->Close();
cStream->Close();
fStream->Close();
// Return the string.
return val;
}
catch ( CryptographicException^ e )
{
Console::WriteLine( "A Cryptographic error occurred: {0}", e->Message );
return nullptr;
}
catch ( UnauthorizedAccessException^ e )
{
Console::WriteLine( "A file access error occurred: {0}", e->Message );
return nullptr;
}
}
int main()
{
try
{
// Create a new TripleDESCryptoServiceProvider object
// to generate a key and initialization vector (IV).
TripleDESCryptoServiceProvider^ tDESalg = gcnew TripleDESCryptoServiceProvider;
// Create a string to encrypt.
String^ sData = "Here is some data to encrypt.";
String^ FileName = "CText.txt";
// Encrypt text to a file using the file name, key, and IV.
EncryptTextToFile( sData, FileName, tDESalg->Key, tDESalg->IV );
// Decrypt the text from a file using the file name, key, and IV.
String^ Final = DecryptTextFromFile( FileName, tDESalg->Key, tDESalg->IV );
// Display the decrypted string to the console.
Console::WriteLine( Final );
}
catch ( Exception^ e )
{
Console::WriteLine( e->Message );
}
}
using System;
using System.Security.Cryptography;
using System.Text;
using System.IO;
class TrippleDESCSPSample
{
static void Main()
{
try
{
// Create a new TripleDESCryptoServiceProvider object
// to generate a key and initialization vector (IV).
TripleDESCryptoServiceProvider tDESalg = new TripleDESCryptoServiceProvider();
// Create a string to encrypt.
string sData = "Here is some data to encrypt.";
string FileName = "CText.txt";
// Encrypt text to a file using the file name, key, and IV.
EncryptTextToFile(sData, FileName, tDESalg.Key, tDESalg.IV);
// Decrypt the text from a file using the file name, key, and IV.
string Final = DecryptTextFromFile(FileName, tDESalg.Key, tDESalg.IV);
// Display the decrypted string to the console.
Console.WriteLine(Final);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
public static void EncryptTextToFile(String Data, String FileName, byte[] Key, byte[] IV)
{
try
{
// Create or open the specified file.
FileStream fStream = File.Open(FileName,FileMode.OpenOrCreate);
// Create a CryptoStream using the FileStream
// and the passed key and initialization vector (IV).
CryptoStream cStream = new CryptoStream(fStream,
new TripleDESCryptoServiceProvider().CreateEncryptor(Key,IV),
CryptoStreamMode.Write);
// Create a StreamWriter using the CryptoStream.
StreamWriter sWriter = new StreamWriter(cStream);
// Write the data to the stream
// to encrypt it.
sWriter.WriteLine(Data);
// Close the streams and
// close the file.
sWriter.Close();
cStream.Close();
fStream.Close();
}
catch(CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
}
catch(UnauthorizedAccessException e)
{
Console.WriteLine("A file access error occurred: {0}", e.Message);
}
}
public static string DecryptTextFromFile(String FileName, byte[] Key, byte[] IV)
{
try
{
// Create or open the specified file.
FileStream fStream = File.Open(FileName, FileMode.OpenOrCreate);
// Create a CryptoStream using the FileStream
// and the passed key and initialization vector (IV).
CryptoStream cStream = new CryptoStream(fStream,
new TripleDESCryptoServiceProvider().CreateDecryptor(Key,IV),
CryptoStreamMode.Read);
// Create a StreamReader using the CryptoStream.
StreamReader sReader = new StreamReader(cStream);
// Read the data from the stream
// to decrypt it.
string val = sReader.ReadLine();
// Close the streams and
// close the file.
sReader.Close();
cStream.Close();
fStream.Close();
// Return the string.
return val;
}
catch(CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
return null;
}
catch(UnauthorizedAccessException e)
{
Console.WriteLine("A file access error occurred: {0}", e.Message);
return null;
}
}
}
Imports System.Security.Cryptography
Imports System.Text
Imports System.IO
Module TrippleDESCSPSample
Sub Main()
Try
' Create a new TripleDESCryptoServiceProvider object
' to generate a key and initialization vector (IV).
Dim tDESalg As New TripleDESCryptoServiceProvider
' Create a string to encrypt.
Dim sData As String = "Here is some data to encrypt."
Dim FileName As String = "CText.txt"
' Encrypt text to a file using the file name, key, and IV.
EncryptTextToFile(sData, FileName, tDESalg.Key, tDESalg.IV)
' Decrypt the text from a file using the file name, key, and IV.
Dim Final As String = DecryptTextFromFile(FileName, tDESalg.Key, tDESalg.IV)
' Display the decrypted string to the console.
Console.WriteLine(Final)
Catch e As Exception
Console.WriteLine(e.Message)
End Try
End Sub
Sub EncryptTextToFile(ByVal Data As String, ByVal FileName As String, ByVal Key() As Byte, ByVal IV() As Byte)
Try
' Create or open the specified file.
Dim fStream As FileStream = File.Open(FileName, FileMode.OpenOrCreate)
' Create a CryptoStream using the FileStream
' and the passed key and initialization vector (IV).
Dim cStream As New CryptoStream(fStream, _
New TripleDESCryptoServiceProvider().CreateEncryptor(Key, IV), _
CryptoStreamMode.Write)
' Create a StreamWriter using the CryptoStream.
Dim sWriter As New StreamWriter(cStream)
' Write the data to the stream
' to encrypt it.
sWriter.WriteLine(Data)
' Close the streams and
' close the file.
sWriter.Close()
cStream.Close()
fStream.Close()
Catch e As CryptographicException
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message)
Catch e As UnauthorizedAccessException
Console.WriteLine("A file error occurred: {0}", e.Message)
End Try
End Sub
Function DecryptTextFromFile(ByVal FileName As String, ByVal Key() As Byte, ByVal IV() As Byte) As String
Try
' Create or open the specified file.
Dim fStream As FileStream = File.Open(FileName, FileMode.OpenOrCreate)
' Create a CryptoStream using the FileStream
' and the passed key and initialization vector (IV).
Dim cStream As New CryptoStream(fStream, _
New TripleDESCryptoServiceProvider().CreateDecryptor(Key, IV), _
CryptoStreamMode.Read)
' Create a StreamReader using the CryptoStream.
Dim sReader As New StreamReader(cStream)
' Read the data from the stream
' to decrypt it.
Dim val As String = sReader.ReadLine()
' Close the streams and
' close the file.
sReader.Close()
cStream.Close()
fStream.Close()
' Return the string.
Return val
Catch e As CryptographicException
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message)
Return Nothing
Catch e As UnauthorizedAccessException
Console.WriteLine("A file error occurred: {0}", e.Message)
Return Nothing
End Try
End Function
End Module
下列程式碼範例會 TripleDESCryptoServiceProvider 建立 物件，並使用它來加密和解密記憶體中的資料。
using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Text;
using namespace System::IO;
array<Byte>^ EncryptTextToMemory( String^ Data, array<Byte>^Key, array<Byte>^IV )
{
try
{
// Create a MemoryStream.
MemoryStream^ mStream = gcnew MemoryStream;
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream^ cStream = gcnew CryptoStream( mStream,(gcnew TripleDESCryptoServiceProvider)->CreateEncryptor( Key, IV ),CryptoStreamMode::Write );
// Convert the passed string to a byte array.
array<Byte>^toEncrypt = (gcnew ASCIIEncoding)->GetBytes( Data );
// Write the byte array to the crypto stream and flush it.
cStream->Write( toEncrypt, 0, toEncrypt->Length );
cStream->FlushFinalBlock();
// Get an array of bytes from the
// MemoryStream that holds the
// encrypted data.
array<Byte>^ret = mStream->ToArray();
// Close the streams.
cStream->Close();
mStream->Close();
// Return the encrypted buffer.
return ret;
}
catch ( CryptographicException^ e )
{
Console::WriteLine( "A Cryptographic error occurred: {0}", e->Message );
return nullptr;
}
}
String^ DecryptTextFromMemory( array<Byte>^Data, array<Byte>^Key, array<Byte>^IV )
{
try
{
// Create a new MemoryStream using the passed
// array of encrypted data.
MemoryStream^ msDecrypt = gcnew MemoryStream( Data );
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream^ csDecrypt = gcnew CryptoStream( msDecrypt,(gcnew TripleDESCryptoServiceProvider)->CreateDecryptor( Key, IV ),CryptoStreamMode::Read );
// Create buffer to hold the decrypted data.
array<Byte>^fromEncrypt = gcnew array<Byte>(Data->Length);
// Read the decrypted data out of the crypto stream
// and place it into the temporary buffer.
csDecrypt->Read( fromEncrypt, 0, fromEncrypt->Length );
//Convert the buffer into a string and return it.
return (gcnew ASCIIEncoding)->GetString( fromEncrypt );
}
catch ( CryptographicException^ e )
{
Console::WriteLine( "A Cryptographic error occurred: {0}", e->Message );
return nullptr;
}
}
int main()
{
try
{
// Create a new TripleDESCryptoServiceProvider object
// to generate a key and initialization vector (IV).
TripleDESCryptoServiceProvider^ tDESalg = gcnew TripleDESCryptoServiceProvider;
// Create a string to encrypt.
String^ sData = "Here is some data to encrypt.";
// Encrypt the string to an in-memory buffer.
array<Byte>^Data = EncryptTextToMemory( sData, tDESalg->Key, tDESalg->IV );
// Decrypt the buffer back to a string.
String^ Final = DecryptTextFromMemory( Data, tDESalg->Key, tDESalg->IV );
// Display the decrypted string to the console.
Console::WriteLine( Final );
}
catch ( Exception^ e )
{
Console::WriteLine( e->Message );
}
}
using System;
using System.Security.Cryptography;
using System.Text;
using System.IO;
class TrippleDESCSPSample
{
static void Main()
{
try
{
// Create a new TripleDESCryptoServiceProvider object
// to generate a key and initialization vector (IV).
TripleDESCryptoServiceProvider tDESalg = new TripleDESCryptoServiceProvider();
// Create a string to encrypt.
string sData = "Here is some data to encrypt.";
// Encrypt the string to an in-memory buffer.
byte[] Data = EncryptTextToMemory(sData, tDESalg.Key, tDESalg.IV);
// Decrypt the buffer back to a string.
string Final = DecryptTextFromMemory(Data, tDESalg.Key, tDESalg.IV);
// Display the decrypted string to the console.
Console.WriteLine(Final);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
public static byte[] EncryptTextToMemory(string Data, byte[] Key, byte[] IV)
{
try
{
// Create a MemoryStream.
MemoryStream mStream = new MemoryStream();
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream cStream = new CryptoStream(mStream,
new TripleDESCryptoServiceProvider().CreateEncryptor(Key, IV),
CryptoStreamMode.Write);
// Convert the passed string to a byte array.
byte[] toEncrypt = new ASCIIEncoding().GetBytes(Data);
// Write the byte array to the crypto stream and flush it.
cStream.Write(toEncrypt, 0, toEncrypt.Length);
cStream.FlushFinalBlock();
// Get an array of bytes from the
// MemoryStream that holds the
// encrypted data.
byte[] ret = mStream.ToArray();
// Close the streams.
cStream.Close();
mStream.Close();
// Return the encrypted buffer.
return ret;
}
catch(CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
return null;
}
}
public static string DecryptTextFromMemory(byte[] Data, byte[] Key, byte[] IV)
{
try
{
// Create a new MemoryStream using the passed
// array of encrypted data.
MemoryStream msDecrypt = new MemoryStream(Data);
// Create a CryptoStream using the MemoryStream
// and the passed key and initialization vector (IV).
CryptoStream csDecrypt = new CryptoStream(msDecrypt,
new TripleDESCryptoServiceProvider().CreateDecryptor(Key, IV),
CryptoStreamMode.Read);
// Create buffer to hold the decrypted data.
byte[] fromEncrypt = new byte[Data.Length];
// Read the decrypted data out of the crypto stream
// and place it into the temporary buffer.
csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length);
//Convert the buffer into a string and return it.
return new ASCIIEncoding().GetString(fromEncrypt);
}
catch(CryptographicException e)
{
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message);
return null;
}
}
}
Imports System.Security.Cryptography
Imports System.Text
Imports System.IO
Module TrippleDESCSPSample
Sub Main()
Try
' Create a new TripleDESCryptoServiceProvider object
' to generate a key and initialization vector (IV).
Dim tDESalg As New TripleDESCryptoServiceProvider
' Create a string to encrypt.
Dim sData As String = "Here is some data to encrypt."
' Encrypt the string to an in-memory buffer.
Dim Data As Byte() = EncryptTextToMemory(sData, tDESalg.Key, tDESalg.IV)
' Decrypt the buffer back to a string.
Dim Final As String = DecryptTextFromMemory(Data, tDESalg.Key, tDESalg.IV)
' Display the decrypted string to the console.
Console.WriteLine(Final)
Catch e As Exception
Console.WriteLine(e.Message)
End Try
End Sub
Function EncryptTextToMemory(ByVal Data As String, ByVal Key() As Byte, ByVal IV() As Byte) As Byte()
Try
' Create a MemoryStream.
Dim mStream As New MemoryStream
' Create a CryptoStream using the MemoryStream
' and the passed key and initialization vector (IV).
Dim cStream As New CryptoStream(mStream, _
New TripleDESCryptoServiceProvider().CreateEncryptor(Key, IV), _
CryptoStreamMode.Write)
' Convert the passed string to a byte array.
Dim toEncrypt As Byte() = New ASCIIEncoding().GetBytes(Data)
' Write the byte array to the crypto stream and flush it.
cStream.Write(toEncrypt, 0, toEncrypt.Length)
cStream.FlushFinalBlock()
' Get an array of bytes from the
' MemoryStream that holds the
' encrypted data.
Dim ret As Byte() = mStream.ToArray()
' Close the streams.
cStream.Close()
mStream.Close()
' Return the encrypted buffer.
Return ret
Catch e As CryptographicException
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message)
Return Nothing
End Try
End Function
Function DecryptTextFromMemory(ByVal Data() As Byte, ByVal Key() As Byte, ByVal IV() As Byte) As String
Try
' Create a new MemoryStream using the passed
' array of encrypted data.
Dim msDecrypt As New MemoryStream(Data)
' Create a CryptoStream using the MemoryStream
' and the passed key and initialization vector (IV).
Dim csDecrypt As New CryptoStream(msDecrypt, _
New TripleDESCryptoServiceProvider().CreateDecryptor(Key, IV), _
CryptoStreamMode.Read)
' Create buffer to hold the decrypted data.
Dim fromEncrypt(Data.Length - 1) As Byte
' Read the decrypted data out of the crypto stream
' and place it into the temporary buffer.
csDecrypt.Read(fromEncrypt, 0, fromEncrypt.Length)
'Convert the buffer into a string and return it.
Return New ASCIIEncoding().GetString(fromEncrypt)
Catch e As CryptographicException
Console.WriteLine("A Cryptographic error occurred: {0}", e.Message)
Return Nothing
End Try
End Function
End Module
備註
此演算法支援 128 位到 192 位的金鑰長度，增量為 64 位。
注意
有先進加密標準 (Advanced Encryption Standard，AES) 這個較新的對稱加密演算法可供使用。 請考慮使用 AesCryptoServiceProvider 類別，而不是 TripleDESCryptoServiceProvider 類別。 TripleDESCryptoServiceProvider僅用於與繼承應用程式和資料的相容性。
建構函式
| TripleDESCryptoServiceProvider() |
初始化 TripleDESCryptoServiceProvider 類別的新執行個體。 |
欄位
| BlockSizeValue |
表示密碼編譯作業的區塊大小，以位元為單位。 (繼承來源 SymmetricAlgorithm) |
| FeedbackSizeValue |
表示密碼編譯作業的回饋大小，以位元為單位。 (繼承來源 SymmetricAlgorithm) |
| IVValue |
表示對稱演算法的初始化向量 (IV)。 (繼承來源 SymmetricAlgorithm) |
| KeySizeValue |
表示對稱演算法使用之祕密金鑰的大小，以位元為單位。 (繼承來源 SymmetricAlgorithm) |
| KeyValue |
表示對稱演算法的祕密金鑰。 (繼承來源 SymmetricAlgorithm) |
| LegalBlockSizesValue |
指定對稱演算法所支援的區塊大小，以位元為單位。 (繼承來源 SymmetricAlgorithm) |
| LegalKeySizesValue |
指定對稱演算法所支援的金鑰大小，以位元為單位。 (繼承來源 SymmetricAlgorithm) |
| ModeValue |
表示對稱演算法中使用的密碼模式。 (繼承來源 SymmetricAlgorithm) |
| PaddingValue |
表示對稱演算法中使用的填補模式。 (繼承來源 SymmetricAlgorithm) |
屬性
| BlockSize |
取得或設定密碼編譯作業的區塊大小，以位元為單位。 |
| BlockSize |
取得或設定密碼編譯作業的區塊大小，以位元為單位。 (繼承來源 SymmetricAlgorithm) |
| FeedbackSize |
取得或設定加密回饋 (CFB) 和輸出回饋 (OFB) 加密模式之密碼編譯作業的回饋大小 (以位元為單位)。 |
| FeedbackSize |
取得或設定加密回饋 (CFB) 和輸出回饋 (OFB) 加密模式之密碼編譯作業的回饋大小 (以位元為單位)。 (繼承來源 SymmetricAlgorithm) |
| IV |
取得或設定對稱演算法的初始化向量 (IV)。 |
| IV |
取得或設定對稱演算法的初始化向量 (IV)。 (繼承來源 SymmetricAlgorithm) |
| Key |
取得或設定 TripleDES 演算法的祕密金鑰。 |
| Key |
取得或設定 TripleDES 演算法的祕密金鑰。 (繼承來源 TripleDES) |
| KeySize |
取得或設定秘密金鑰的大小 (以位元為單位)。 |
| KeySize |
取得或設定對稱演算法使用之秘密金鑰的大小，以位元為單位。 (繼承來源 SymmetricAlgorithm) |
| LegalBlockSizes |
取得對稱演算法所支援的區塊大小，以位元為單位。 |
| LegalBlockSizes |
取得對稱演算法所支援的區塊大小，以位元為單位。 (繼承來源 TripleDES) |
| LegalKeySizes |
取得對稱演算法所支援的金鑰大小，以位元為單位。 |
| LegalKeySizes |
取得對稱演算法所支援的金鑰大小，以位元為單位。 (繼承來源 TripleDES) |
| Mode |
取得或設定對稱演算法的作業模式。 |
| Mode |
取得或設定對稱演算法的作業模式。 (繼承來源 SymmetricAlgorithm) |
| Padding |
取得或設定對稱演算法中使用的填補模式。 |
| Padding |
取得或設定對稱演算法中使用的填補模式。 (繼承來源 SymmetricAlgorithm) |
方法
明確介面實作
| IDisposable.Dispose() |
此 API 支援此產品基礎結構，但無法直接用於程式碼之中。 釋放 SymmetricAlgorithm 所使用的 Unmanaged 資源，並選擇性地釋放 Managed 資源。 (繼承來源 SymmetricAlgorithm) |