RijndaelManaged 類別

定義

存取 Rijndael 演算法的 Managed 版本。Accesses the managed version of the Rijndael algorithm. 此類別無法獲得繼承。This class cannot be inherited.

public ref class RijndaelManaged sealed : System::Security::Cryptography::Rijndael
public sealed class RijndaelManaged : System.Security.Cryptography.Rijndael
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class RijndaelManaged : System.Security.Cryptography.Rijndael
type RijndaelManaged = class
    inherit Rijndael
[<System.Runtime.InteropServices.ComVisible(true)>]
type RijndaelManaged = class
    inherit Rijndael
Public NotInheritable Class RijndaelManaged
Inherits Rijndael
繼承
屬性

範例

下列範例示範如何使用類別來加密和解密範例資料 RijndaelManagedThe following example demonstrates how to encrypt and decrypt sample data using the RijndaelManaged class.

#using <System.dll>

using namespace System;
using namespace System::IO;
using namespace System::Security::Cryptography;


class RijndaelMemoryExample
{
public:
    static array<Byte>^ encryptStringToBytes_AES(String^ plainText, array<Byte>^ Key, array<Byte>^ IV)
    {
        // Check arguments.
        if (!plainText || plainText->Length <= 0)
            throw gcnew ArgumentNullException("plainText");
        if (!Key || Key->Length <= 0)
            throw gcnew ArgumentNullException("Key");
        if (!IV  || IV->Length <= 0)
            throw gcnew ArgumentNullException("IV");

        // Declare the streams used
        // to encrypt to an in memory
        // array of bytes.
        MemoryStream^   msEncrypt;
        CryptoStream^   csEncrypt;
        StreamWriter^   swEncrypt;

        // Declare the RijndaelManaged object
        // used to encrypt the data.
        RijndaelManaged^ aesAlg;

        try
        {
            // Create a RijndaelManaged object
            // with the specified key and IV.
            aesAlg = gcnew RijndaelManaged();
            aesAlg->Padding = PaddingMode::PKCS7;
            aesAlg->Key = Key;
            aesAlg->IV = IV;

            // Create an encryptor to perform the stream transform.
            ICryptoTransform^ encryptor = aesAlg->CreateEncryptor(aesAlg->Key, aesAlg->IV);

            // Create the streams used for encryption.
            msEncrypt = gcnew MemoryStream();
            csEncrypt = gcnew CryptoStream(msEncrypt, encryptor, CryptoStreamMode::Write);
            swEncrypt = gcnew StreamWriter(csEncrypt);

            //Write all data to the stream.
            swEncrypt->Write(plainText);
            swEncrypt->Flush();
            csEncrypt->FlushFinalBlock();
            msEncrypt->Flush();
        }
        finally
        {
            // Clean things up.

            // Close the streams.
            if(swEncrypt)
                swEncrypt->Close();
            if (csEncrypt)
                csEncrypt->Close();


            // Clear the RijndaelManaged object.
            if (aesAlg)
                aesAlg->Clear();
        }

        // Return the encrypted bytes from the memory stream.
        return msEncrypt->ToArray();
    }

    static String^ decryptStringFromBytes_AES(array<Byte>^ cipherText, array<Byte>^ Key, array<Byte>^ IV)
    {
        // Check arguments.
        if (!cipherText || cipherText->Length <= 0)
            throw gcnew ArgumentNullException("cipherText");
        if (!Key || Key->Length <= 0)
            throw gcnew ArgumentNullException("Key");
        if (!IV || IV->Length <= 0)
            throw gcnew ArgumentNullException("IV");

        // TDeclare the streams used
        // to decrypt to an in memory
        // array of bytes.
        MemoryStream^ msDecrypt;
        CryptoStream^ csDecrypt;
        StreamReader^ srDecrypt;

        // Declare the RijndaelManaged object
        // used to decrypt the data.
        RijndaelManaged^ aesAlg;

        // Declare the string used to hold
        // the decrypted text.
        String^ plaintext;

        try
        {
            // Create a RijndaelManaged object
            // with the specified key and IV.
            aesAlg = gcnew RijndaelManaged();
            aesAlg->Padding = PaddingMode::PKCS7;
            aesAlg->Key = Key;
            aesAlg->IV = IV;

            // Create a decryptor to perform the stream transform.
            ICryptoTransform^ decryptor = aesAlg->CreateDecryptor(aesAlg->Key, aesAlg->IV);

            // Create the streams used for decryption.
            msDecrypt = gcnew MemoryStream(cipherText);
            csDecrypt = gcnew CryptoStream(msDecrypt, decryptor, CryptoStreamMode::Read);
            srDecrypt = gcnew StreamReader(csDecrypt);

            // Read the decrypted bytes from the decrypting stream
            // and place them in a string.
            plaintext = srDecrypt->ReadToEnd();
        }
        finally
        {
            // Clean things up.

            // Close the streams.
            if (srDecrypt)
                srDecrypt->Close();
            if (csDecrypt)
                csDecrypt->Close();
            if (msDecrypt)
                msDecrypt->Close();

            // Clear the RijndaelManaged object.
            if (aesAlg)
                aesAlg->Clear();
        }

        return plaintext;
    }
};

int main()
{
    try
    {
        String^ original = "Here is some data to encrypt!";

        // Create a new instance of the RijndaelManaged
        // class.  This generates a new key and initialization
        // vector (IV).
        RijndaelManaged^ myRijndael = gcnew RijndaelManaged();

        // Encrypt the string to an array of bytes.
        array<Byte>^ encrypted = RijndaelMemoryExample::encryptStringToBytes_AES(original, myRijndael->Key, myRijndael->IV);

        // Decrypt the bytes to a string.
        String^ roundtrip = RijndaelMemoryExample::decryptStringFromBytes_AES(encrypted, myRijndael->Key, myRijndael->IV);

        //Display the original data and the decrypted data.
        Console::WriteLine("Original:   {0}", original);
        Console::WriteLine("Round Trip: {0}", roundtrip);
    }
    catch (Exception^ e)
    {
        Console::WriteLine("Error: {0}", e->Message);
    }

    return 0;
}
using System;
using System.IO;
using System.Security.Cryptography;

namespace RijndaelManaged_Example
{
    class RijndaelExample
    {
        public static void Main()
        {
            try
            {

                string original = "Here is some data to encrypt!";

                // Create a new instance of the RijndaelManaged
                // class.  This generates a new key and initialization
                // vector (IV).
                using (RijndaelManaged myRijndael = new RijndaelManaged())
                {

                    myRijndael.GenerateKey();
                    myRijndael.GenerateIV();
                    // Encrypt the string to an array of bytes.
                    byte[] encrypted = EncryptStringToBytes(original, myRijndael.Key, myRijndael.IV);

                    // Decrypt the bytes to a string.
                    string roundtrip = DecryptStringFromBytes(encrypted, myRijndael.Key, myRijndael.IV);

                    //Display the original data and the decrypted data.
                    Console.WriteLine("Original:   {0}", original);
                    Console.WriteLine("Round Trip: {0}", roundtrip);
                }
            }
            catch (Exception e)
            {
                Console.WriteLine("Error: {0}", e.Message);
            }
        }
        static byte[] EncryptStringToBytes(string plainText, byte[] Key, byte[] IV)
        {
            // Check arguments.
            if (plainText == null || plainText.Length <= 0)
                throw new ArgumentNullException("plainText");
            if (Key == null || Key.Length <= 0)
                throw new ArgumentNullException("Key");
            if (IV == null || IV.Length <= 0)
                throw new ArgumentNullException("IV");
            byte[] encrypted;
            // Create an RijndaelManaged object
            // with the specified key and IV.
            using (RijndaelManaged rijAlg = new RijndaelManaged())
            {
                rijAlg.Key = Key;
                rijAlg.IV = IV;

                // Create an encryptor to perform the stream transform.
                ICryptoTransform encryptor = rijAlg.CreateEncryptor(rijAlg.Key, rijAlg.IV);

                // Create the streams used for encryption.
                using (MemoryStream msEncrypt = new MemoryStream())
                {
                    using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
                    {
                        using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
                        {

                            //Write all data to the stream.
                            swEncrypt.Write(plainText);
                        }
                        encrypted = msEncrypt.ToArray();
                    }
                }
            }

            // Return the encrypted bytes from the memory stream.
            return encrypted;
        }

        static string DecryptStringFromBytes(byte[] cipherText, byte[] Key, byte[] IV)
        {
            // Check arguments.
            if (cipherText == null || cipherText.Length <= 0)
                throw new ArgumentNullException("cipherText");
            if (Key == null || Key.Length <= 0)
                throw new ArgumentNullException("Key");
            if (IV == null || IV.Length <= 0)
                throw new ArgumentNullException("IV");

            // Declare the string used to hold
            // the decrypted text.
            string plaintext = null;

            // Create an RijndaelManaged object
            // with the specified key and IV.
            using (RijndaelManaged rijAlg = new RijndaelManaged())
            {
                rijAlg.Key = Key;
                rijAlg.IV = IV;

                // Create a decryptor to perform the stream transform.
                ICryptoTransform decryptor = rijAlg.CreateDecryptor(rijAlg.Key, rijAlg.IV);

                // Create the streams used for decryption.
                using (MemoryStream msDecrypt = new MemoryStream(cipherText))
                {
                    using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
                    {
                        using (StreamReader srDecrypt = new StreamReader(csDecrypt))
                        {
                            // Read the decrypted bytes from the decrypting stream
                            // and place them in a string.
                            plaintext = srDecrypt.ReadToEnd();
                        }
                    }
                }
            }

            return plaintext;
        }
    }
}
Imports System.IO
Imports System.Security.Cryptography



Class RijndaelExample

    Public Shared Sub Main()
        Try

            Dim original As String = "Here is some data to encrypt!"

            ' Create a new instance of the RijndaelManaged
            ' class.  This generates a new key and initialization 
            ' vector (IV).
            Using myRijndael As New RijndaelManaged()
            
                myRijndael.GenerateKey()
                myRijndael.GenerateIV()

                ' Encrypt the string to an array of bytes.
                Dim encrypted As Byte() = EncryptStringToBytes(original, myRijndael.Key, myRijndael.IV)

                ' Decrypt the bytes to a string.
                Dim roundtrip As String = DecryptStringFromBytes(encrypted, myRijndael.Key, myRijndael.IV)

                'Display the original data and the decrypted data.
                Console.WriteLine("Original:   {0}", original)
                Console.WriteLine("Round Trip: {0}", roundtrip)
            End Using
        Catch e As Exception
            Console.WriteLine("Error: {0}", e.Message)
        End Try

    End Sub

    Shared Function EncryptStringToBytes(ByVal plainText As String, ByVal Key() As Byte, ByVal IV() As Byte) As Byte()
        ' Check arguments.
        If plainText Is Nothing OrElse plainText.Length <= 0 Then
            Throw New ArgumentNullException("plainText")
        End If
        If Key Is Nothing OrElse Key.Length <= 0 Then
            Throw New ArgumentNullException("Key")
        End If
        If IV Is Nothing OrElse IV.Length <= 0 Then
            Throw New ArgumentNullException("IV")
        End If
        Dim encrypted() As Byte
        
        ' Create an RijndaelManaged object
        ' with the specified key and IV.
        Using rijAlg As New RijndaelManaged()

            rijAlg.Key = Key
            rijAlg.IV = IV

            ' Create an encryptor to perform the stream transform.
            Dim encryptor As ICryptoTransform = rijAlg.CreateEncryptor(rijAlg.Key, rijAlg.IV)
            ' Create the streams used for encryption.
            Using msEncrypt As New MemoryStream()
                Using csEncrypt As New CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)
                    Using swEncrypt As New StreamWriter(csEncrypt)
                        'Write all data to the stream.
                        swEncrypt.Write(plainText)
                    End Using
                    encrypted = msEncrypt.ToArray()
                End Using
            End Using
        End Using

        ' Return the encrypted bytes from the memory stream.
        Return encrypted

    End Function 'EncryptStringToBytes

    Shared Function DecryptStringFromBytes(ByVal cipherText() As Byte, ByVal Key() As Byte, ByVal IV() As Byte) As String
        ' Check arguments.
        If cipherText Is Nothing OrElse cipherText.Length <= 0 Then
            Throw New ArgumentNullException("cipherText")
        End If
        If Key Is Nothing OrElse Key.Length <= 0 Then
            Throw New ArgumentNullException("Key")
        End If
        If IV Is Nothing OrElse IV.Length <= 0 Then
            Throw New ArgumentNullException("IV")
        End If
        ' Declare the string used to hold
        ' the decrypted text.
        Dim plaintext As String = Nothing

        ' Create an RijndaelManaged object
        ' with the specified key and IV.
        Using rijAlg As New RijndaelManaged
            rijAlg.Key = Key
            rijAlg.IV = IV

            ' Create a decryptor to perform the stream transform.
            Dim decryptor As ICryptoTransform = rijAlg.CreateDecryptor(rijAlg.Key, rijAlg.IV)

            ' Create the streams used for decryption.
            Using msDecrypt As New MemoryStream(cipherText)

                Using csDecrypt As New CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)

                    Using srDecrypt As New StreamReader(csDecrypt)


                        ' Read the decrypted bytes from the decrypting stream
                        ' and place them in a string.
                        plaintext = srDecrypt.ReadToEnd()
                    End Using
                End Using
            End Using
        End Using

        Return plaintext

    End Function 'DecryptStringFromBytes 
End Class

備註

此演算法支援128、192或256位的金鑰長度;預設為256位。This algorithm supports key lengths of 128, 192, or 256 bits; defaulting to 256 bits. 在 .NET Framework 中,此演算法支援128、192或256位的區塊大小;預設為128位 (Aes 相容的) 。In .NET Framework, this algorithm supports block sizes of 128, 192, or 256 bits; defaulting to 128 bits (Aes-compatible). 在 .NET Core 中,它與 AES 相同,而且僅支援128位的區塊大小。In .NET Core, it is the same as AES and supports only a 128-bit block size.

重要

Rijndael類別是演算法的前置項 AesThe Rijndael class is the predecessor of the Aes algorithm. 您應該使用 Aes 演算法,而不是 RijndaelYou should use the Aes algorithm instead of Rijndael. 如需詳細資訊,請參閱 .NET 安全性 blog 中的 Rijndael 與 AES 之間的差異For more information, see the entry The Differences Between Rijndael and AES in the .NET Security blog.

建構函式

RijndaelManaged()

初始化 RijndaelManaged 類別的新執行個體。Initializes a new instance of the RijndaelManaged class.

欄位

BlockSizeValue

表示密碼編譯作業的區塊大小,以位元為單位。Represents the block size, in bits, of the cryptographic operation.

(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。Represents the feedback size, in bits, of the cryptographic operation.

(繼承來源 SymmetricAlgorithm)
IVValue

表示對稱演算法的初始化向量 (IV)。Represents the initialization vector (IV) for the symmetric algorithm.

(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。Represents the size, in bits, of the secret key used by the symmetric algorithm.

(繼承來源 SymmetricAlgorithm)
KeyValue

表示對稱演算法的祕密金鑰。Represents the secret key for the symmetric algorithm.

(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。Specifies the block sizes, in bits, that are supported by the symmetric algorithm.

(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。Specifies the key sizes, in bits, that are supported by the symmetric algorithm.

(繼承來源 SymmetricAlgorithm)
ModeValue

表示對稱演算法中使用的密碼模式。Represents the cipher mode used in the symmetric algorithm.

(繼承來源 SymmetricAlgorithm)
PaddingValue

表示對稱演算法中使用的填補模式。Represents the padding mode used in the symmetric algorithm.

(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。Gets or sets the block size, in bits, of the cryptographic operation.

BlockSize

取得或設定密碼編譯作業的區塊大小,以位元為單位。Gets or sets the block size, in bits, of the cryptographic operation.

(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)。Gets or sets the feedback size, in bits, of the cryptographic operation for the Cipher Feedback (CFB) and Output Feedback (OFB) cipher modes.

(繼承來源 SymmetricAlgorithm)
IV

取得或設定對稱演算法的初始化向量 (IV)。Gets or sets the initialization vector (IV) to use for the symmetric algorithm.

IV

取得或設定對稱演算法的初始化向量 (IV)。Gets or sets the initialization vector (IV) for the symmetric algorithm.

(繼承來源 SymmetricAlgorithm)
Key

取得或設定用於對稱演算法的秘密金鑰。Gets or sets the secret key used for the symmetric algorithm.

Key

取得或設定對稱演算法的秘密金鑰。Gets or sets the secret key for the symmetric algorithm.

(繼承來源 SymmetricAlgorithm)
KeySize

取得或設定用於對稱演算法之秘密金鑰的大小,以位元為單位。Gets or sets the size, in bits, of the secret key used for the symmetric algorithm.

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。Gets or sets the size, in bits, of the secret key used by the symmetric algorithm.

(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。Gets the block sizes, in bits, that are supported by the symmetric algorithm.

(繼承來源 SymmetricAlgorithm)
LegalKeySizes

取得對稱演算法所支援的金鑰大小,以位元為單位。Gets the key sizes, in bits, that are supported by the symmetric algorithm.

LegalKeySizes

取得對稱演算法所支援的金鑰大小,以位元為單位。Gets the key sizes, in bits, that are supported by the symmetric algorithm.

(繼承來源 SymmetricAlgorithm)
Mode

取得或設定對稱演算法的作業模式。Gets or sets the mode for operation of the symmetric algorithm.

Mode

取得或設定對稱演算法的作業模式。Gets or sets the mode for operation of the symmetric algorithm.

(繼承來源 SymmetricAlgorithm)
Padding

取得或設定對稱演算法中使用的填補模式。Gets or sets the padding mode used in the symmetric algorithm.

Padding

取得或設定對稱演算法中使用的填補模式。Gets or sets the padding mode used in the symmetric algorithm.

(繼承來源 SymmetricAlgorithm)

方法

Clear()

釋放 SymmetricAlgorithm 類別所使用的所有資源。Releases all resources used by the SymmetricAlgorithm class.

(繼承來源 SymmetricAlgorithm)
CreateDecryptor()

使用目前的 Key 屬性和初始化向量 (IV),建立對稱解密子物件。Creates a symmetric decryptor object with the current Key property and initialization vector (IV).

CreateDecryptor()

使用目前的 Key 屬性和初始化向量 (IV),建立對稱解密子物件。Creates a symmetric decryptor object with the current Key property and initialization vector (IV).

(繼承來源 SymmetricAlgorithm)
CreateDecryptor(Byte[], Byte[])

使用指定的 Rijndael 和初始化向量 (Key),建立對稱 IV 解密子物件。Creates a symmetric Rijndael decryptor object with the specified Key and initialization vector (IV).

CreateEncryptor()

使用目前的 Key 屬性和初始化向量 (IV),建立對稱加密子物件。Creates a symmetric encryptor object with the current Key property and initialization vector (IV).

CreateEncryptor()

使用目前的 Key 屬性和初始化向量 (IV),建立對稱加密子物件。Creates a symmetric encryptor object with the current Key property and initialization vector (IV).

(繼承來源 SymmetricAlgorithm)
CreateEncryptor(Byte[], Byte[])

使用指定的 Rijndael 和初始化向量 (Key),建立對稱 IV 加密子物件。Creates a symmetric Rijndael encryptor object with the specified Key and initialization vector (IV).

Dispose()

釋放 SymmetricAlgorithm 類別目前的執行個體所使用的全部資源。Releases all resources used by the current instance of the SymmetricAlgorithm class.

(繼承來源 SymmetricAlgorithm)
Dispose(Boolean)

釋放 SymmetricAlgorithm 所使用的 Unmanaged 資源,並選擇性地釋放 Managed 資源。Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources.

(繼承來源 SymmetricAlgorithm)
Equals(Object)

判斷指定的物件是否等於目前的物件。Determines whether the specified object is equal to the current object.

(繼承來源 Object)
GenerateIV()

產生要使用於該演算法的隨機初始化向量 (IV)。Generates a random initialization vector (IV) to be used for the algorithm.

GenerateKey()

產生要使用於該演算法的隨機 KeyGenerates a random Key to be used for the algorithm.

GetHashCode()

做為預設雜湊函式。Serves as the default hash function.

(繼承來源 Object)
GetType()

取得目前執行個體的 TypeGets the Type of the current instance.

(繼承來源 Object)
MemberwiseClone()

建立目前 Object 的淺層複製。Creates a shallow copy of the current Object.

(繼承來源 Object)
ToString()

傳回代表目前物件的字串。Returns a string that represents the current object.

(繼承來源 Object)
ValidKeySize(Int32)

判斷指定的金鑰大小對目前的演算法是否有效。Determines whether the specified key size is valid for the current algorithm.

(繼承來源 SymmetricAlgorithm)

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。Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources.

(繼承來源 SymmetricAlgorithm)

適用於

另請參閱