AesManaged Class

.NET Framework (current version)

Provides a managed implementation of the Advanced Encryption Standard (AES) symmetric algorithm.

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

Inheritance Hierarchy

System::Object
System.Security.Cryptography::SymmetricAlgorithm
System.Security.Cryptography::Aes
System.Security.Cryptography::AesManaged

Syntax

C++

public ref class AesManaged sealed : Aes

Constructors

	Name	Description
	AesManaged()	Initializes a new instance of the AesManaged class.

Properties

	Name	Description
	BlockSize	Gets or sets the block size, in bits, of the cryptographic operation.(Inherited from SymmetricAlgorithm.)
	FeedbackSize	Gets or sets the number of bits to use as feedback. (Overrides SymmetricAlgorithm::FeedbackSize.)
	IV	Gets or sets the initialization vector (IV) to use for the symmetric algorithm. (Overrides SymmetricAlgorithm::IV.)
	Key	Gets or sets the secret key used for the symmetric algorithm.(Overrides SymmetricAlgorithm::Key.)
	KeySize	Gets or sets the size, in bits, of the secret key used for the symmetric algorithm. (Overrides SymmetricAlgorithm::KeySize.)
	LegalBlockSizes	Gets the block sizes, in bits, that are supported by the symmetric algorithm.(Inherited from SymmetricAlgorithm.)
	LegalKeySizes	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.(Overrides SymmetricAlgorithm::Mode.)
	Padding	Gets or sets the padding mode used in the symmetric algorithm. (Overrides SymmetricAlgorithm::Padding.)

Methods

	Name	Description
	Clear()	Releases all resources used by the SymmetricAlgorithm class.(Inherited from SymmetricAlgorithm.)
	CreateDecryptor()	Creates a symmetric decryptor object using the current key and initialization vector (IV).(Overrides SymmetricAlgorithm::CreateDecryptor().)
	CreateDecryptor(array<Byte>^, array<Byte>^)	Creates a symmetric decryptor object using the specified key and initialization vector (IV).(Overrides SymmetricAlgorithm::CreateDecryptor(array<Byte>^, array<Byte>^).)
	CreateEncryptor()	Creates a symmetric encryptor object using the current key and initialization vector (IV).(Overrides SymmetricAlgorithm::CreateEncryptor().)
	CreateEncryptor(array<Byte>^, array<Byte>^)	Creates a symmetric encryptor object using the specified key and initialization vector (IV).(Overrides SymmetricAlgorithm::CreateEncryptor(array<Byte>^, array<Byte>^).)
	Dispose()	Releases all resources used by the current instance of the SymmetricAlgorithm class.(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 use for the symmetric algorithm.(Overrides SymmetricAlgorithm::GenerateIV().)
	GenerateKey()	Generates a random key to use for the symmetric algorithm. (Overrides SymmetricAlgorithm::GenerateKey().)
	GetHashCode()	Serves as the default hash function. (Inherited from Object.)
	GetType()	Gets the Type of the current instance.(Inherited from Object.)
	ToString()	Returns a string that represents the current object.(Inherited from Object.)
	ValidKeySize(Int32)	Determines whether the specified key size is valid for the current algorithm.(Inherited from SymmetricAlgorithm.)

The AES algorithm is essentially the Rijndael symmetric algorithm with a fixed block size and iteration count. This class functions the same way as the RijndaelManaged class but limits blocks to 128 bits and does not allow feedback modes.

Note
If the Windows security policy setting for Federal Information Processing Standards (FIPS)-compliant algorithms is enabled, using this algorithm throws a CryptographicException.