HashAlgorithmProvider Kelas

Definisi

Ruang nama:

Windows.Security.Cryptography.Core

Mewakili penyedia hash kriptografi. Untuk informasi selengkapnya tentang hash, lihat MAT, hash, dan tanda tangan.

public ref class HashAlgorithmProvider sealed

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class HashAlgorithmProvider final

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class HashAlgorithmProvider

Public NotInheritable Class HashAlgorithmProvider

Warisan

Object Platform::Object IInspectable HashAlgorithmProvider

Atribut

ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Persyaratan Windows

Rangkaian perangkat	Windows 10 (diperkenalkan dalam 10.0.10240.0)
API contract	Windows.Foundation.UniversalApiContract (diperkenalkan dalam v1.0)

Contoh

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

namespace SampleHashAlgorithmProvider
{

    sealed partial class HashAlgProviderApp : Application
    {
        public HashAlgProviderApp()
        {
            // Initialize the application.
            this.InitializeComponent();

            // Hash a message.
            String strAlgName = HashAlgorithmNames.Sha512;
            String strMsg = "This is a message to be hashed.";
            String strEncodedHash = this.SampleHashMsg(strAlgName, strMsg);
        }

        public String SampleHashMsg(String strAlgName, String strMsg)
        {
            // Convert the message string to binary data.
            IBuffer buffUtf8Msg = CryptographicBuffer.ConvertStringToBinary(strMsg, BinaryStringEncoding.Utf8);

            // Create a HashAlgorithmProvider object.
            HashAlgorithmProvider objAlgProv = HashAlgorithmProvider.OpenAlgorithm(strAlgName);

            // Demonstrate how to retrieve the name of the hashing algorithm.
            String strAlgNameUsed = objAlgProv.AlgorithmName;

            // Hash the message.
            IBuffer buffHash = objAlgProv.HashData(buffUtf8Msg);

            // Verify that the hash length equals the length specified for the algorithm.
            if (buffHash.Length != objAlgProv.HashLength)
            {
                throw new Exception("There was an error creating the hash");
            }

            // Convert the hash to a string (for display).
            String strHashBase64 = CryptographicBuffer.EncodeToBase64String(buffHash);

            // Return the encoded string
            return strHashBase64;
        }
    }
}

Keterangan

Anda membuat objek HashAlgorithmProvider dengan memanggil metode OpenAlgorithm statis dan menentukan salah satu nama algoritma berikut:

• MD5
• SHA1
• SHA256
• SHA384
• SHA512

Properti

AlgorithmName	Mendapatkan nama algoritma hash terbuka.
HashLength	Mendapatkan panjang, dalam byte, dari hash.

Metode

CreateHash()	Membuat objek CryptographicHash yang dapat digunakan kembali.
HashData(IBuffer)	Hash data biner.
OpenAlgorithm(String)	Membuat objek HashAlgorithmProvider dan membuka algoritma yang ditentukan untuk digunakan.

Lihat juga

• MAT, hash, dan tanda tangan