Qop Directive

Sipping internet draft paul dsmith expires. This directive is optional in order to preserve backward compatibility with a minimal implementation of rfc 2069 6 but should be used if the server indicated that qop is supported by providing a qop directive in the www authenticate header field.

Figure 2 From Managing Security Trade Offs In The Internet Of

The qop directive as specified in section 322 is optional to preserve backward compatibility with minimal implementation of digest access authentication as specified in.

Qop directive. The quality of protection identified by the qop directive is first specified by the server in the digest challenge and then confirmed by the client in the challenge response. Rfc2617 specifies that the qop directive should 13 be used by the client if the server indicates that qop is supported by providing a qop directive in the www authenticate header field. The result is the response value provided by the client.

This directive must be specified if a qop directive is sent see above and must not be specified if the server did not send a qop directive in the www authenticate header field. The cnonce value is an. The nc value is the hexadecimal count of the number of requests including the current request that the client has sent with the nonce value in this request.

Rfc 2069 specifies roughly a traditional digest authentication scheme with security maintained by a server generated nonce value. Cnonce this must be specified if a qop directive is sent see above and. The server responds with the 401 response code either requesting digest authentication and providing the authentication realm and a randomly generated single use value called a nonce or requesting basic authentication in which case the server should also redirect and negotiate tls channel security https if the client is not already.

If the client requires a quality of protection that the server does not support the client must terminate the authentication. So the server also needs to know the qop we selected. Rfc 2069 6 but should be used if the server indicated that qop is supported by providing a qop directive in the www authenticate header field.

This must be specified if a qop directive is sent see above and must not be specified if the server did not send a qop directive in the www authenticate header field. The md5 hash of the combined ha1 result server nonce nonce request counter nc client nonce cnonce quality of protection code qop and ha2 result is calculated. We provide the selected value using this qop directive.

Cnonce this must be specified if a qop directive is sent see above and must not be specified if the server did not send a qop directive in the www authenticate header field. November 2005 data connection ltd ian clarkson data connection ltd june 2005 digest authentication examples for session initiation protocol sip draft smith sipping auth examples 01txt status of this memo by submitting this internet draft each author represents that any applicable patent or other. Digest access authentication was originally specified by rfc 2069 an extension to http.

Http Digest Authentication With Php