CryptographicKey 類別

定義

命名空間:

Windows.Security.Cryptography.Core

表示對稱金鑰或非對稱金鑰組。

public ref class CryptographicKey sealed

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
class CryptographicKey final

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
public sealed class CryptographicKey

Public NotInheritable Class CryptographicKey

繼承

Object Platform::Object IInspectable CryptographicKey

屬性

ContractVersionAttribute MarshalingBehaviorAttribute

Windows 需求

裝置系列	Windows 10 (已於 10.0.10240.0 引進)
API contract	Windows.Foundation.UniversalApiContract (已於 v1.0 引進)

範例

using Windows.Security.Cryptography;
using Windows.Security.Cryptography.Core;
using Windows.Storage.Streams;

namespace SampleCryptographicKey
{
    sealed partial class CryptographicKeyApp : Application
    {
        static IBuffer buffKeyPair;

        public CryptographicKeyApp()
        {
            // Initialize the application.
            this.InitializeComponent();

            // Create an asymmetric key pair.
            String strAsymmetricAlgName = AsymmetricAlgorithmNames.RsaPkcs1;
            UInt32 asymmetricKeyLength = 512;
            IBuffer buffPublicKey = this.SampleCreateAsymmetricKeyPair(
                strAsymmetricAlgName,
                asymmetricKeyLength);
        }

        public IBuffer SampleCreateAsymmetricKeyPair(
            String strAsymmetricAlgName,
            UInt32 keyLength)
        {
            // Open the algorithm provider for the specified asymmetric algorithm.
            AsymmetricKeyAlgorithmProvider objAlgProv = AsymmetricKeyAlgorithmProvider.OpenAlgorithm(strAsymmetricAlgName);

            // Create an asymmetric key pair.
            CryptographicKey keyPair = objAlgProv.CreateKeyPair(keyLength);

            // Export the public key to a buffer for use by others.
            IBuffer buffPublicKey = keyPair.ExportPublicKey();

            // You should keep your private key (embedded in the key pair) secure. For  
            // the purposes of this example, however, we're just copying it into a
            // static class variable for later use during decryption.
            CryptographicKeyApp.buffKeyPair = keyPair.Export();

            // Retrieve the size of the key pair.
            UInt32 lengthKeyPair = keyPair.KeySize;

            // Return the public key.
            return buffPublicKey;
        }
    }
}

備註

當您使用在下列類別中建立或匯入金鑰的方法時，就會建立 CryptographicKey 物件：

• AsymmetricKeyAlgorithmProvider
• KeyDerivationAlgorithmProvider
• MacAlgorithmProvider
• SymmetricKeyAlgorithmProvider

屬性

KeySize

取得金鑰的大小 (以位元為單位)。

方法

Export()	將金鑰組匯出至緩衝區。
Export(CryptographicPrivateKeyBlobType)	將金鑰組匯出至指定格式的緩衝區。
ExportPublicKey()	將公開金鑰匯出至緩衝區。
ExportPublicKey(CryptographicPublicKeyBlobType)	將公開金鑰匯出至指定格式的緩衝區。

另請參閱

• AsymmetricKeyAlgorithmProvider
• SymmetricKeyAlgorithmProvider