CryptographicKey CryptographicKey CryptographicKey CryptographicKey Class

Definition

public : sealed class CryptographicKey : ICryptographicKeypublic sealed class CryptographicKey : ICryptographicKeyPublic NotInheritable Class CryptographicKey Implements ICryptographicKey// You can use this class in JavaScript.

Attributes

ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute

Examples

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;
        }
    }
}

Remarks

A CryptographicKey object is created when you use methods that create or import keys in the following classes:

• AsymmetricKeyAlgorithmProvider
• KeyDerivationAlgorithmProvider
• MacAlgorithmProvider
• SymmetricKeyAlgorithmProvider

public : unsigned int KeySize { get; }public uint KeySize { get; }Public ReadOnly Property KeySize As uint// You can use this property in JavaScript.

public : IBuffer Export()public IBuffer Export()Public Function Export() As IBuffer// You can use this method in JavaScript.

public : IBuffer Export(CryptographicPrivateKeyBlobType BlobType)public IBuffer Export(CryptographicPrivateKeyBlobType BlobType)Public Function Export(BlobType As CryptographicPrivateKeyBlobType) As IBuffer// You can use this method in JavaScript.

public : IBuffer ExportPublicKey()public IBuffer ExportPublicKey()Public Function ExportPublicKey() As IBuffer// You can use this method in JavaScript.

public : IBuffer ExportPublicKey(CryptographicPublicKeyBlobType BlobType)public IBuffer ExportPublicKey(CryptographicPublicKeyBlobType BlobType)Public Function ExportPublicKey(BlobType As CryptographicPublicKeyBlobType) As IBuffer// You can use this method in JavaScript.