3.1.5.8 Receiving a LinkMacToViewerSecurityChallenge Message

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The client MUST perform the steps in section 3.1.5.2. Also, the client MUST verify that the LinkMacToViewerSecurityChallenge (section 2.2.4.14) message adheres to the syntax specified in section 2.2.4.14.

If the server's major version number is greater than or equal to 9, as specified by the Server-Version variable in the abstract data model, the client SHOULD update the value of the Auth-Scheme variable as follows: If the first two bytes of the pToken field in the LinkMacToViewerSecurityChallenge message are both 0x00, the Auth-Scheme variable MUST be set to NTLM. Otherwise, the Auth-Scheme variable MUST be set to BASIC.

If the server's major version number is less than 9, as specified by the Server-Version variable, the client SHOULD update the value of the Auth-Scheme variable as follows: If either of the first two bytes of the pToken field in the LinkMacToViewerSecurityChallenge message have a value other than 0x00, the Auth-Scheme variable MUST be set to BASIC. Otherwise, the value of the Auth-Scheme variable MUST remain unchanged.<42>

The client MUST send a LinkViewerToMacSecurityResponse (section 2.2.4.24) message, as specified in section 2.2.4.24.

The client MUST set the value of the pToken field in the LinkViewerToMacSecurityResponse message to authentication data appropriate for the authentication scheme identified by the Auth-Scheme variable in the abstract data model. For example, if the value of the Auth-Scheme variable is BASIC, the client includes the user name and password in the pToken field formatted according to the syntax rules for Basic authentication.

After sending the LinkViewerToMacSecurityResponse message, the client MUST wait for a LinkMacToViewerReportRedirect (section 2.2.4.9) message, a LinkMacToViewerSecurityChallenge message, or a LinkMacToViewerReportOpenFile (section 2.2.4.7) message to be received. How to process a LinkMacToViewerReportRedirect (section 2.2.4.9) message is specified in section 3.1.5.7; how to process a LinkMacToViewerSecurityChallenge message is specified in section 3.1.5.8; and how to process a LinkMacToViewerReportOpenFile (section 2.2.4.7) message is specified in section 3.1.5.9.<43>