CryptographicHash Classe

Définition

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

Héritage

Object Platform::Object IInspectable CryptographicHash

Attributs

ContractVersionAttribute MarshalingBehaviorAttribute

Configuration requise pour Windows

Exemples

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);
}

Remarques

Appelez la méthode HashAlgorithmProvider.CreateHash ou MacAlgorithmProvider.CreateHash pour créer un objet CryptographicHash. Vous pouvez ouvrir un fournisseur d’algorithme de hachage, par nom, pour l’un des noms d’algorithmes suivants :

• MD5
• SHA1
• SHA256
• SHA384
• SHA512

Méthodes

S’applique à

Voir aussi

• HashAlgorithmProvider
• CreateHash()