CryptographicHash 類別

定義

命名空間:

Windows.Security.Cryptography.Core

表示可重複使用的雜湊物件，並包含雜湊作業的結果。

public ref class CryptographicHash sealed

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

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

Public NotInheritable Class CryptographicHash

繼承

Object Platform::Object IInspectable CryptographicHash

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

public void SampleReusableHash()
{
    // Create a string that contains the name of the hashing algorithm to use.
    String strAlgName = HashAlgorithmNames.Sha512;

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

    // Create a CryptographicHash object. This object can be reused to continually
    // hash new messages.
    CryptographicHash objHash = objAlgProv.CreateHash();

    // Hash message 1.
    String strMsg1 = "This is message 1.";
    IBuffer buffMsg1 = CryptographicBuffer.ConvertStringToBinary(strMsg1, BinaryStringEncoding.Utf16BE);
    objHash.Append(buffMsg1);
    IBuffer buffHash1 = objHash.GetValueAndReset();

    // Hash message 2.
    String strMsg2 = "This is message 2.";
    IBuffer buffMsg2 = CryptographicBuffer.ConvertStringToBinary(strMsg2, BinaryStringEncoding.Utf16BE);
    objHash.Append(buffMsg2);
    IBuffer buffHash2 = objHash.GetValueAndReset();

    // Hash message 3.
    String strMsg3 = "This is message 3.";
    IBuffer buffMsg3 = CryptographicBuffer.ConvertStringToBinary(strMsg3, BinaryStringEncoding.Utf16BE);
    objHash.Append(buffMsg3);
    IBuffer buffHash3 = objHash.GetValueAndReset();

    // Convert the hashes to string values (for display);
    String strHash1 = CryptographicBuffer.EncodeToBase64String(buffHash1);
    String strHash2 = CryptographicBuffer.EncodeToBase64String(buffHash2);
    String strHash3 = CryptographicBuffer.EncodeToBase64String(buffHash3);
}

備註

呼叫 HashAlgorithmProvider.CreateHash 或 MacAlgorithmProvider.CreateHash 方法來建立 CryptographicHash 物件。 您可以針對下列任何演算法名稱，依名稱開啟雜湊演算法提供者：

• MD5
• SHA1
• SHA256
• SHA384
• SHA512

方法

Append(IBuffer)	將二進位編碼字串附加至 儲存在 CryptographicHash 物件中的資料。
GetValueAndReset()	從 CryptographicHash 物件取得雜湊資料，並重設 物件。

另請參閱

• HashAlgorithmProvider
• CreateHash()