EncryptedXml.DecryptKey Method

Definition

Namespace:

System.Security.Cryptography.Xml

Assembly:

System.Security.Cryptography.Xml.dll

Decrypts an <EncryptedKey> element.

Overloads

DecryptKey(Byte[], SymmetricAlgorithm)	Decrypts an <EncryptedKey> element using a symmetric algorithm.
DecryptKey(Byte[], RSA, Boolean)	Decrypts an <EncryptedKey> element using an asymmetric algorithm.

Remarks

Use the DecryptKey method to decrypt an <EncryptedKey> element and retrieve the key used to decrypt that element.

DecryptKey(Byte[], SymmetricAlgorithm)

Source:

EncryptedXml.cs

Decrypts an <EncryptedKey> element using a symmetric algorithm.

public:
 static cli::array <System::Byte> ^ DecryptKey(cli::array <System::Byte> ^ keyData, System::Security::Cryptography::SymmetricAlgorithm ^ symmetricAlgorithm);

public static byte[] DecryptKey (byte[] keyData, System.Security.Cryptography.SymmetricAlgorithm symmetricAlgorithm);

static member DecryptKey : byte[] * System.Security.Cryptography.SymmetricAlgorithm -> byte[]

Public Shared Function DecryptKey (keyData As Byte(), symmetricAlgorithm As SymmetricAlgorithm) As Byte()

Parameters

keyData

Byte[]

An array of bytes that represents an encrypted <EncryptedKey> element.

symmetricAlgorithm

SymmetricAlgorithm

The symmetric key used to decrypt keyData.

Returns

Byte[]

A byte array that contains the plain text key.

Exceptions

ArgumentNullException

The value of the keyData parameter is null.

-or-

The value of the symmetricAlgorithm parameter is null.

CryptographicException

The value of the symmetricAlgorithm element is not the Triple DES Key Wrap algorithm or the Advanced Encryption Standard (AES) Key Wrap algorithm (also called Rijndael).

Remarks

The DecryptKey method decrypts an encrypted key contained within the <EncryptedKey> element of an XML document. This method accepts a value for the symmetricAlgorithm parameter that represents either the Triple DES algorithm or the AES key wrap algorithm (also called Rijndael).

DecryptKey(Byte[], RSA, Boolean)

Source:

EncryptedXml.cs

Decrypts an <EncryptedKey> element using an asymmetric algorithm.

public:
 static cli::array <System::Byte> ^ DecryptKey(cli::array <System::Byte> ^ keyData, System::Security::Cryptography::RSA ^ rsa, bool useOAEP);

public static byte[] DecryptKey (byte[] keyData, System.Security.Cryptography.RSA rsa, bool useOAEP);

static member DecryptKey : byte[] * System.Security.Cryptography.RSA * bool -> byte[]

Public Shared Function DecryptKey (keyData As Byte(), rsa As RSA, useOAEP As Boolean) As Byte()

Parameters

keyData

Byte[]

An array of bytes that represents an encrypted <EncryptedKey> element.

rsa

RSA

The asymmetric key used to decrypt keyData.

useOAEP

Boolean

A value that specifies whether to use Optimal Asymmetric Encryption Padding (OAEP).

Returns

Byte[]

A byte array that contains the plain text key.

Exceptions

ArgumentNullException

The value of the keyData parameter is null.

-or-

The value of the rsa parameter is null.

Remarks

The DecryptKey method decrypts an encrypted key contained within the <EncryptedKey> element of an XML document. This method accepts a value for the rsa parameter that represents either the RSA PKCS#1 v1.5 algorithm or the RSA PKCS#1 type 2 algorithm (also called OAEP padding).