RijndaelManaged 클래스

정의

Rijndael 알고리즘의 관리되는 버전에 액세스합니다.Accesses the managed version of the Rijndael algorithm. 이 클래스는 상속될 수 없습니다.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
Public NotInheritable Class RijndaelManaged
Inherits Rijndael
상속
특성

예제

다음 예제에서는 RijndaelManaged 클래스를 사용 하 여 샘플 데이터를 암호화 하 고 해독 하는 방법을 보여 줍니다.The 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

설명

이 알고리즘은 키 길이 128, 192 또는 256 비트; 지원 256 비트를 기본값으로 합니다.This algorithm supports key lengths of 128, 192, or 256 bits; defaulting to 256 bits. .NET Framework에서이 알고리즘은 128, 192 또는 256 비트의 블록 크기를 지원 합니다. 128 비트 (Aes호환)를 기본값으로 합니다.In .NET Framework, this algorithm supports block sizes of 128, 192, or 256 bits; defaulting to 128 bits (Aes-compatible). .NET Core에서는 AES와 동일 하며 128 비트 블록 크기만 지원 합니다.In .NET Core, it is the same as AES and supports only a 128-bit block size.

Rijndael 알고리즘은 Aes의 선행 작업입니다.The Rijndael algorithm is the predecessor of Aes. RijndaelManaged대신 Aes 클래스를 사용 해야 합니다.You should use the Aes class instead of RijndaelManaged. 자세한 내용은 .NET 보안 블로그에서 Rijndael과 AES의 차이점 항목을 참조 하세요.For more information, see the entry The Differences Between Rijndael and AES in the .NET Security blog.

생성자

RijndaelManaged()

RijndaelManaged 클래스의 새 인스턴스를 초기화합니다.Initializes a new instance of the RijndaelManaged class.

필드

BlockSizeValue

암호화 작업의 블록 크기(비트)를 나타냅니다.Represents the block size, in bits, of the cryptographic operation.

(다음에서 상속됨 SymmetricAlgorithm)
FeedbackSizeValue

암호화 작업의 피드백 크기(비트 단위)를 나타냅니다.Represents the feedback size, in bits, of the cryptographic operation.

(다음에서 상속됨 SymmetricAlgorithm)
IVValue

대칭 알고리즘에 대한 초기화 벡터(IV)를 나타냅니다.Represents the initialization vector (IV) for the symmetric algorithm.

(다음에서 상속됨 SymmetricAlgorithm)
KeySizeValue

대칭 알고리즘에서 사용하는 비밀 키의 크기(비트)를 나타냅니다.Represents the size, in bits, of the secret key used by the symmetric algorithm.

(다음에서 상속됨 SymmetricAlgorithm)
KeyValue

대칭 알고리즘에 대한 비밀 키를 나타냅니다.Represents the secret key for the symmetric algorithm.

(다음에서 상속됨 SymmetricAlgorithm)
LegalBlockSizesValue

대칭 알고리즘에서 지원하는 블록 크기(비트 단위)를 지정합니다.Specifies the block sizes, in bits, that are supported by the symmetric algorithm.

(다음에서 상속됨 SymmetricAlgorithm)
LegalKeySizesValue

대칭 알고리즘에서 지원하는 키 크기(비트)를 지정합니다.Specifies the key sizes, in bits, that are supported by the symmetric algorithm.

(다음에서 상속됨 SymmetricAlgorithm)
ModeValue

대칭 알고리즘에 사용된 암호화 모드를 나타냅니다.Represents the cipher mode used in the symmetric algorithm.

(다음에서 상속됨 SymmetricAlgorithm)
PaddingValue

대칭 알고리즘에 사용된 패딩 모드를 나타냅니다.Represents the padding mode used in the symmetric algorithm.

(다음에서 상속됨 SymmetricAlgorithm)

속성

BlockSize

암호화 작업의 블록 크기(비트)를 가져오거나 설정합니다.Gets or sets the block size, in bits, of the cryptographic operation.

FeedbackSize

CFB(Cipher Feedback) 및 OFB(Output Feedback) 암호화 모드에 대한 암호화 작업의 피드백 크기(비트 단위)를 가져오거나 설정합니다.Gets or sets the feedback size, in bits, of the cryptographic operation for the Cipher Feedback (CFB) and Output Feedback (OFB) cipher modes.

(다음에서 상속됨 SymmetricAlgorithm)
IV

초기화 벡터 (IV) 대칭 알고리즘에 사용 하도록 설정 하거나 가져옵니다.Gets or sets the initialization vector (IV) to use for the symmetric algorithm.

Key

대칭 알고리즘에 사용 되는 비밀 키를 가져오거나 설정 합니다.Gets or sets the secret key used for the symmetric algorithm.

KeySize

대칭 알고리즘에 사용 되는 비밀 키의 비트에서 크기를 가져오거나 설정 합니다.Gets or sets the size, in bits, of the secret key used for the symmetric algorithm.

LegalBlockSizes

대칭 알고리즘에서 지원하는 블록 크기(비트)를 가져옵니다.Gets the block sizes, in bits, that are supported by the symmetric algorithm.

(다음에서 상속됨 SymmetricAlgorithm)
LegalKeySizes

대칭 알고리즘에서 지원하는 키 크기(비트)를 가져옵니다.Gets the key sizes, in bits, that are supported by the symmetric algorithm.

Mode

대칭 알고리즘의 작업 모드를 가져오거나 설정합니다.Gets or sets the mode for operation of the symmetric algorithm.

Padding

대칭 알고리즘에 사용된 패딩 모드를 가져오거나 설정합니다.Gets or sets the padding mode used in the symmetric algorithm.

메서드

Clear()

SymmetricAlgorithm 클래스에서 사용하는 모든 리소스를 해제합니다.Releases all resources used by the SymmetricAlgorithm class.

(다음에서 상속됨 SymmetricAlgorithm)
CreateDecryptor()

현재 Key 속성 및 초기화 벡터(IV)를 사용하여 대칭 decryptor 개체를 만듭니다.Creates a symmetric decryptor object with the current Key property and initialization vector (IV).

CreateDecryptor(Byte[], Byte[])

지정한 Rijndael와 초기화 벡터(Key)를 사용하여 대칭 IV decryptor 개체를 만듭니다.Creates a symmetric Rijndael decryptor object with the specified Key and initialization vector (IV).

CreateEncryptor()

현재 Key 속성 및 초기화 벡터(IV)를 사용하여 대칭 encryptor 개체를 만듭니다.Creates a symmetric encryptor object with the current Key property and initialization vector (IV).

CreateEncryptor(Byte[], Byte[])

지정한 Rijndael와 초기화 벡터(Key)를 사용하여 대칭 IV encryptor 개체를 만듭니다.Creates a symmetric Rijndael encryptor object with the specified Key and initialization vector (IV).

Dispose()

SymmetricAlgorithm 클래스의 현재 인스턴스에서 사용하는 모든 리소스를 해제합니다.Releases all resources used by the current instance of the SymmetricAlgorithm class.

(다음에서 상속됨 SymmetricAlgorithm)
Dispose(Boolean)

SymmetricAlgorithm에서 사용한 관리되지 않는 리소스를 해제하고 선택적으로 관리되는 리소스를 해제합니다.Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources.

(다음에서 상속됨 SymmetricAlgorithm)
Equals(Object)

지정한 개체가 현재 개체와 같은지를 확인합니다.Determines whether the specified object is equal to the current object.

(다음에서 상속됨 Object)
GenerateIV()

알고리즘에 사용할 임의의 초기화 벡터(IV)를 생성합니다.Generates a random initialization vector (IV) to be used for the algorithm.

GenerateKey()

알고리즘에 사용할 임의의 Key를 생성합니다.Generates a random Key to be used for the algorithm.

GetHashCode()

기본 해시 함수로 작동합니다.Serves as the default hash function.

(다음에서 상속됨 Object)
GetType()

현재 인스턴스의 Type을 가져옵니다.Gets the Type of the current instance.

(다음에서 상속됨 Object)
MemberwiseClone()

현재 Object의 단순 복사본을 만듭니다.Creates a shallow copy of the current Object.

(다음에서 상속됨 Object)
ToString()

현재 개체를 나타내는 string을 반환합니다.Returns a string that represents the current object.

(다음에서 상속됨 Object)
ValidKeySize(Int32)

지정된 키 크기가 현재 알고리즘에 유효한지 여부를 결정합니다.Determines whether the specified key size is valid for the current algorithm.

(다음에서 상속됨 SymmetricAlgorithm)

명시적 인터페이스 구현

IDisposable.Dispose()

SymmetricAlgorithm에서 사용한 관리되지 않는 리소스를 해제하고 선택적으로 관리되는 리소스를 해제합니다.Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources.

(다음에서 상속됨 SymmetricAlgorithm)

적용 대상

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