DES Class

Reference

Definition

Namespace:: System.Security.Cryptography

Assembly:: System.Security.Cryptography.Algorithms.dll

Assembly:: System.Security.Cryptography.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Source:: DES.cs

Source:: DES.cs

Source:: DES.cs

Important

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Represents the base class for the Data Encryption Standard (DES) algorithm from which all DES implementations must derive.

public ref class DES abstract : System::Security::Cryptography::SymmetricAlgorithm

[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public abstract class DES : System.Security.Cryptography.SymmetricAlgorithm

public abstract class DES : System.Security.Cryptography.SymmetricAlgorithm

[System.Runtime.InteropServices.ComVisible(true)]
public abstract class DES : System.Security.Cryptography.SymmetricAlgorithm

[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
type DES = class
    inherit SymmetricAlgorithm

type DES = class
    inherit SymmetricAlgorithm

[<System.Runtime.InteropServices.ComVisible(true)>]
type DES = class
    inherit SymmetricAlgorithm

Public MustInherit Class DES
Inherits SymmetricAlgorithm

Inheritance: Object

SymmetricAlgorithm
DES

Derived: System.Security.Cryptography.DESCryptoServiceProvider

Attributes: UnsupportedOSPlatformAttribute ComVisibleAttribute

Remarks

This algorithm supports a key length of 64 bits.

Note

A newer symmetric encryption algorithm, Advanced Encryption Standard (AES), is available. Consider using the Aes class instead of the DES class. Use DES only for compatibility with legacy applications and data.

Constructors

DES()

Initializes a new instance of the DES class.

Fields

BlockSizeValue	Represents the block size, in bits, of the cryptographic operation. (Inherited from SymmetricAlgorithm)
FeedbackSizeValue	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)
KeySizeValue	Represents the size, in bits, of the secret key used by the symmetric algorithm. (Inherited from SymmetricAlgorithm)
KeyValue	Represents the secret key for the symmetric algorithm. (Inherited from SymmetricAlgorithm)
LegalBlockSizesValue	Specifies the block sizes, in bits, that are supported by the symmetric algorithm. (Inherited from SymmetricAlgorithm)
LegalKeySizesValue	Specifies the key sizes, in bits, that are supported by the symmetric algorithm. (Inherited from SymmetricAlgorithm)
ModeValue	Represents the cipher mode used in the symmetric algorithm. (Inherited from SymmetricAlgorithm)
PaddingValue	Represents the padding mode used in the symmetric algorithm. (Inherited from SymmetricAlgorithm)

Properties

BlockSize	Gets or sets the block size, in bits, of the cryptographic operation. (Inherited from SymmetricAlgorithm)
FeedbackSize	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) for the symmetric algorithm. (Inherited from SymmetricAlgorithm)
Key	Gets or sets the secret key for the Data Encryption Standard (DES) algorithm.
KeySize	Gets or sets the size, in bits, of the secret key used by the symmetric algorithm. (Inherited from SymmetricAlgorithm)
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. (Inherited from SymmetricAlgorithm)
Padding	Gets or sets the padding mode used in the symmetric algorithm. (Inherited from SymmetricAlgorithm)

Methods

Clear()	Releases all resources used by the SymmetricAlgorithm class. (Inherited from SymmetricAlgorithm)
Create()	Creates an instance of a cryptographic object to perform the Data Encryption Standard (DES) algorithm.
Create(String)	Obsolete. Creates an instance of a cryptographic object to perform the specified implementation of the Data Encryption Standard (DES) algorithm.
CreateDecryptor()	Creates a symmetric decryptor object with the current Key property and initialization vector (IV). (Inherited from SymmetricAlgorithm)
CreateDecryptor(Byte[], Byte[])	When overridden in a derived class, creates a symmetric decryptor object with the specified Key property and initialization vector (IV). (Inherited from SymmetricAlgorithm)
CreateEncryptor()	Creates a symmetric encryptor object with the current Key property and initialization vector (IV). (Inherited from SymmetricAlgorithm)
CreateEncryptor(Byte[], Byte[])	When overridden in a derived class, creates a symmetric encryptor object with the specified Key property and initialization vector (IV). (Inherited from SymmetricAlgorithm)
DecryptCbc(Byte[], Byte[], PaddingMode)	Decrypts data using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
DecryptCbc(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, PaddingMode)	Decrypts data using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
DecryptCbc(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, PaddingMode)	Decrypts data into the specified buffer, using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
DecryptCfb(Byte[], Byte[], PaddingMode, Int32)	Decrypts data using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm)
DecryptCfb(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, PaddingMode, Int32)	Decrypts data using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm)
DecryptCfb(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, PaddingMode, Int32)	Decrypts data into the specified buffer, using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm)
DecryptEcb(Byte[], PaddingMode)	Decrypts data using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
DecryptEcb(ReadOnlySpan<Byte>, PaddingMode)	Decrypts data using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
DecryptEcb(ReadOnlySpan<Byte>, Span<Byte>, PaddingMode)	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)
EncryptCbc(Byte[], Byte[], PaddingMode)	Encrypts data using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
EncryptCbc(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, PaddingMode)	Encrypts data using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
EncryptCbc(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, PaddingMode)	Encrypts data into the specified buffer, using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
EncryptCfb(Byte[], Byte[], PaddingMode, Int32)	Encrypts data using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm)
EncryptCfb(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, PaddingMode, Int32)	Encrypts data using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm)
EncryptCfb(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, PaddingMode, Int32)	Encrypts data into the specified buffer, using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm)
EncryptEcb(Byte[], PaddingMode)	Encrypts data using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
EncryptEcb(ReadOnlySpan<Byte>, PaddingMode)	Encrypts data using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
EncryptEcb(ReadOnlySpan<Byte>, Span<Byte>, PaddingMode)	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()	When overridden in a derived class, generates a random initialization vector (IV) to use for the algorithm. (Inherited from SymmetricAlgorithm)
GenerateKey()	When overridden in a derived class, generates a random key (Key) to use for the algorithm. (Inherited from SymmetricAlgorithm)
GetCiphertextLengthCbc(Int32, PaddingMode)	Gets the length of a ciphertext with a given padding mode and plaintext length in CBC mode. (Inherited from SymmetricAlgorithm)
GetCiphertextLengthCfb(Int32, PaddingMode, Int32)	Gets the length of a ciphertext with a given padding mode and plaintext length in CFB mode. (Inherited from SymmetricAlgorithm)
GetCiphertextLengthEcb(Int32, PaddingMode)	Gets the length of a ciphertext with a given padding mode and plaintext length in ECB mode. (Inherited from SymmetricAlgorithm)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetType()	Gets the Type of the current instance. (Inherited from Object)
IsSemiWeakKey(Byte[])	Determines whether the specified key is semi-weak.
IsWeakKey(Byte[])	Determines whether the specified key is weak.
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)
TryDecryptCbc(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, Int32, PaddingMode)	Attempts to decrypt data into the specified buffer, using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
TryDecryptCbcCore(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, PaddingMode, Int32)	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)
TryDecryptCfb(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, Int32, PaddingMode, Int32)	Attempts to decrypt data into the specified buffer, using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm)
TryDecryptCfbCore(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, PaddingMode, Int32, Int32)	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)
TryDecryptEcb(ReadOnlySpan<Byte>, Span<Byte>, PaddingMode, Int32)	Attempts to decrypt data into the specified buffer, using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
TryDecryptEcbCore(ReadOnlySpan<Byte>, Span<Byte>, PaddingMode, Int32)	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)
TryEncryptCbc(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, Int32, PaddingMode)	Attempts to encrypt data into the specified buffer, using CBC mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
TryEncryptCbcCore(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, PaddingMode, Int32)	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)
TryEncryptCfb(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, Int32, PaddingMode, Int32)	Attempts to encrypt data into the specified buffer, using CFB mode with the specified padding mode and feedback size. (Inherited from SymmetricAlgorithm)
TryEncryptCfbCore(ReadOnlySpan<Byte>, ReadOnlySpan<Byte>, Span<Byte>, PaddingMode, Int32, Int32)	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)
TryEncryptEcb(ReadOnlySpan<Byte>, Span<Byte>, PaddingMode, Int32)	Attempts to encrypt data into the specified buffer, using ECB mode with the specified padding mode. (Inherited from SymmetricAlgorithm)
TryEncryptEcbCore(ReadOnlySpan<Byte>, Span<Byte>, PaddingMode, Int32)	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)
ValidKeySize(Int32)	Determines whether the specified key size is valid for the current algorithm. (Inherited from SymmetricAlgorithm)

Explicit Interface Implementations

IDisposable.Dispose()

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)

Applies to

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