RijndaelManaged Class
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Caution
The Rijndael and RijndaelManaged types are obsolete. Use Aes instead.
Accesses the managed version of the Rijndael algorithm. This class cannot be inherited.
public ref class RijndaelManaged sealed : System::Security::Cryptography::Rijndael
[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public sealed class RijndaelManaged : System.Security.Cryptography.Rijndael
[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
[System.Obsolete("The Rijndael and RijndaelManaged types are obsolete. Use Aes instead.", DiagnosticId="SYSLIB0022", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public sealed class RijndaelManaged : 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
[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
type RijndaelManaged = class
inherit Rijndael
[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
[<System.Obsolete("The Rijndael and RijndaelManaged types are obsolete. Use Aes instead.", DiagnosticId="SYSLIB0022", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
type RijndaelManaged = class
inherit Rijndael
type RijndaelManaged = class
inherit Rijndael
[<System.Runtime.InteropServices.ComVisible(true)>]
type RijndaelManaged = class
inherit Rijndael
Public NotInheritable Class RijndaelManaged
Inherits Rijndael
- Inheritance
- Attributes
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
This algorithm supports key lengths of 128, 192, or 256 bits; defaulting to 256 bits. In .NET Framework, this algorithm supports block sizes of 128, 192, or 256 bits; defaulting to 128 bits (Aes-compatible). In .NET Core, it is the same as AES and supports only a 128-bit block size.
Important
The Rijndael class is the predecessor of the Aes algorithm. You should use the Aes algorithm instead of Rijndael. For more information, see the entry The Differences Between Rijndael and AES in the .NET Security blog.
Rijndael |
Initializes a new instance of the RijndaelManaged class. |
Block |
Represents the block size, in bits, of the cryptographic operation. (Inherited from SymmetricAlgorithm) |
Feedback |
Represents the feedback size, in bits, of the cryptographic operation. (Inherited from SymmetricAlgorithm) |
IVValue |
Represents the initialization vector (IV) for the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Key |
Represents the size, in bits, of the secret key used by the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Key |
Represents the secret key for the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Legal |
Specifies the block sizes, in bits, that are supported by the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Legal |
Specifies the key sizes, in bits, that are supported by the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Mode |
Represents the cipher mode used in the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Padding |
Represents the padding mode used in the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Block |
Gets or sets the block size, in bits, of the cryptographic operation. |
Block |
Gets or sets the block size, in bits, of the cryptographic operation. (Inherited from SymmetricAlgorithm) |
Feedback |
Gets or sets the feedback size, in bits, of the cryptographic operation for the Cipher Feedback (CFB) and Output Feedback (OFB) cipher modes. |
Feedback |
Gets or sets the feedback size, in bits, of the cryptographic operation for the Cipher Feedback (CFB) and Output Feedback (OFB) cipher modes. (Inherited from SymmetricAlgorithm) |
IV |
Gets or sets the initialization vector (IV) to use for the symmetric algorithm. |
IV |
Gets or sets the initialization vector (IV) for the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Key |
Gets or sets the secret key used for the symmetric algorithm. |
Key |
Gets or sets the secret key for the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Key |
Gets or sets the size, in bits, of the secret key used for the symmetric algorithm. |
Key |
Gets or sets the size, in bits, of the secret key used by the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Legal |
Gets the block sizes, in bits, that are supported by the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Legal |
Gets the key sizes, in bits, that are supported by the symmetric algorithm. |
Legal |
Gets the key sizes, in bits, that are supported by the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Mode |
Gets or sets the mode for operation of the symmetric algorithm. |
Mode |
Gets or sets the mode for operation of the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Padding |
Gets or sets the padding mode used in the symmetric algorithm. |
Padding |
Gets or sets the padding mode used in the symmetric algorithm. (Inherited from SymmetricAlgorithm) |
Clear() |
Releases all resources used by the SymmetricAlgorithm class. (Inherited from SymmetricAlgorithm) |
Create |
Creates a symmetric decryptor object with the current Key property and initialization vector (IV). |
Create |
Creates a symmetric decryptor object with the current Key property and initialization vector (IV). (Inherited from SymmetricAlgorithm) |
Create |
Creates a symmetric Rijndael decryptor object with the specified Key and initialization vector (IV). |
Create |
Creates a symmetric encryptor object with the current Key property and initialization vector (IV). |
Create |
Creates a symmetric encryptor object with the current Key property and initialization vector (IV). (Inherited from SymmetricAlgorithm) |
Create |
Creates a symmetric Rijndael encryptor object with the specified Key and initialization vector (IV). |
Decrypt |
Decrypts data using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Decrypt |
Decrypts data using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Decrypt |
Decrypts data into the specified buffer, using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Decrypt |
Decrypts data using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm) |
Decrypt |
Decrypts data using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm) |
Decrypt |
Decrypts data into the specified buffer, using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm) |
Decrypt |
Decrypts data using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Decrypt |
Decrypts data using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Decrypt |
Decrypts data into the specified buffer, using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Dispose() |
Releases all resources used by the current instance of the SymmetricAlgorithm class. (Inherited from SymmetricAlgorithm) |
Dispose(Boolean) |
Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources. (Inherited from SymmetricAlgorithm) |
Encrypt |
Encrypts data using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Encrypt |
Encrypts data using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Encrypt |
Encrypts data into the specified buffer, using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Encrypt |
Encrypts data using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm) |
Encrypt |
Encrypts data using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm) |
Encrypt |
Encrypts data into the specified buffer, using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm) |
Encrypt |
Encrypts data using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Encrypt |
Encrypts data using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Encrypt |
Encrypts data into the specified buffer, using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
GenerateIV() |
Generates a random initialization vector (IV) to be used for the algorithm. |
Generate |
Generates a random Key to be used for the algorithm. |
Get |
Gets the length of a ciphertext with a given padding mode and plaintext length in CBC mode. (Inherited from SymmetricAlgorithm) |
Get |
Gets the length of a ciphertext with a given padding mode and plaintext length in CFB mode. (Inherited from SymmetricAlgorithm) |
Get |
Gets the length of a ciphertext with a given padding mode and plaintext length in ECB mode. (Inherited from SymmetricAlgorithm) |
Get |
Serves as the default hash function. (Inherited from Object) |
Get |
Gets the Type of the current instance. (Inherited from Object) |
Memberwise |
Creates a shallow copy of the current Object. (Inherited from Object) |
To |
Returns a string that represents the current object. (Inherited from Object) |
Try |
Attempts to decrypt data into the specified buffer, using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Try |
When overridden in a derived class, attempts to decrypt data into the specified buffer, using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Try |
Attempts to decrypt data into the specified buffer, using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm) |
Try |
When overridden in a derived class, attempts to decrypt data into the specified buffer, using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm) |
Try |
Attempts to decrypt data into the specified buffer, using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Try |
When overridden in a derived class, attempts to decrypt data into the specified buffer, using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Try |
Attempts to encrypt data into the specified buffer, using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Try |
When overridden in a derived class, attempts to encrypt data into the specified buffer, using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Try |
Attempts to encrypt data into the specified buffer, using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm) |
Try |
When overridden in a derived class, attempts to encrypt data into the specified buffer, using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm) |
Try |
Attempts to encrypt data into the specified buffer, using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Try |
When overridden in a derived class, attempts to encrypt data into the specified buffer, using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm) |
Valid |
Determines whether the specified key size is valid for the current algorithm. (Inherited from SymmetricAlgorithm) |
IDisposable. |
This API supports the product infrastructure and is not intended to be used directly from your code. Releases the unmanaged resources used by the SymmetricAlgorithm and optionally releases the managed resources. (Inherited from SymmetricAlgorithm) |
Product | Versions (Obsolete) |
---|---|
.NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5 (6, 7, 8, 9) |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 2.0, 2.1 |
.NET feedback
.NET is an open source project. Select a link to provide feedback: