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HashAlgorithmProvider.HashLength | hashLength property

Applies to Windows and Windows Phone

Gets the length, in bytes, of the hash.

Syntax


var hashLength = hashAlgorithmProvider.hashLength;

Property value

Type: Number [JavaScript] | System.UInt32 [.NET] | uint32 [C++]

Number of bytes in the hash.

Remarks

You should verify that the length of the hashed data equals the hash length supported by the specified algorithm. For more information, see the following code example.

Examples


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;
}


Requirements

Minimum supported client

Windows 8

Minimum supported server

Windows Server 2012

Minimum supported phone

Windows Phone 8.1 [Windows Runtime apps only]

Namespace

Windows.Security.Cryptography.Core
Windows::Security::Cryptography::Core [C++]

Metadata

Windows.winmd

See also

HashAlgorithmProvider

 

 

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