HttpAuthenticationScheme Enum

Specifies the HTTP authentication schemes that can be used to authenticate clients with a server.

Syntax

Remarks

This enumeration is used by the HttpClient.DefaultRequestHeaders.Common.Authorization.Scheme property to specify the authentication scheme.

When you are using HTTP authentication, the server requests authentication from the client by sending an HTTP response with a 401 Unauthorized status code and a WWW-Authenticate header. The WWW-Authenticate header specifies the authentication schemes that the server supports.

The client can then respond with a GET or POST request that includes an Authorization header containing credentials that are appropriate for one of the authentication schemes supported by the server.

Members

• Anonymous

  Specifies that no authentication is required.

• Basic

  Specifies Basic authentication. This is a simple authentication scheme where credentials are sent in clear text.

• Digest

  Specifies Digest authentication. This is a more secure authentication scheme than Basic authentication that uses a challenge-response mechanism.

• Negotiate

  Specifies Negotiate authentication. This scheme allows the client and server to negotiate the most secure authentication method available, typically Kerberos or NTLM.

• NTLM

  Specifies NTLM authentication. This is a challenge-response authentication protocol used in Windows environments.

• Kerberos

  Specifies Kerberos authentication. This is a network authentication protocol that uses cryptography to provide strong authentication for client/server applications.

• Custom

  Specifies a custom authentication scheme that is not defined by the other members of this enumeration.

Requirements

See Also

• HttpClient.DefaultRequestHeaders.Common.Authorization
• System.Net.Security Namespace