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First we create an entry in the user s log file for tracking and debugging purposes. Next the script tries to determine the subnet that the node is a part of. This is because systems that are critical to the environment may be segregated by subnet, and you may want the window foreground and background colors to distinguish the critical systems from less important ones. The subnet can be determined in various ways. You could look in the /etc/hosts file or see if the node name is actually an IP address. You could also add an nslookup or dig query, or possibly an NIS lookup of the hosts map. If the subnet can t be determined, we open the connection with foreground and background colors of OTHER_FG and OTHER_BG as defined in the user s configuration file. If the script can determine the subnet, the connection should be opened with the appropriate foreground and background colors. Many color groupings are possible, but I show you only a few combinations here. Using windows with meaningful color settings can help reduce the risk of typing the wrong command in the wrong window. This part of the code is where the new xterm windows are launched:

[WebService()] public class StockTraderService : System.Web.Services.WebService, IStockTrader { [WebMethod()] public override Quote RequestQuote(string Symbol) { // Initialize the custom token manager, in case it is needed CustomUsernameTokenManager objMgr = new CustomUsernameTokenManager(); // Verify the signature on the Web service request to this method bool SignatureIsValid = false; SoapContext requestContext = RequestSoapContext.Current; foreach (ISecurityElement objElem in requestContext.Security.Elements) { if (objElem is MessageSignature) { MessageSignature clientSignature = (MessageSignature)objElem; if (clientSignature.SigningToken is X509SecurityToken) { SignatureIsValid = true; } else if (clientSignature.SigningToken is UsernameToken) { SignatureIsValid = true; objMgr.VerifyToken( clientSignature.SigningToken ); } } } // Proceed with request if signature is valid Quote q = new Quote(); if (SignatureIsValid) {} // Implementation code for RequestQuote() } return q; }

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if [ $third_ip -ge 1 -a $third_ip -le 10 ] then nohup $XTERM -fn $FONT -bg $PROD_BG -fg \ $PROD_FG -sb -sl 500 -T "$nodename" \ -e "$CONNECTION_TYPE" -l $USER $nodename >/dev/null & elif [ $third_ip -ge 11 -a $third_ip -le 20 ] then nohup $XTERM -fn $FONT -bg $NON_PROD_BG \ -fg $NON_PROD_FG -sb -sl 500 -T "$nodename" \ -e "$CONNECTION_TYPE" -l $USER $nodename \ >/dev/null & else nohup $XTERM -fn $FONT -bg $OTHER_BG -fg \ $OTHER_FG -sb -sl 500 -T "$nodename" \ -e "$CONNECTION_TYPE" -l $USER $nodename \ >/dev/null & fi done

Listing 6-8 shows you how to implement a custom token manager, which only applies when you are using a UsernameToken (as opposed to a certificate token, or custom binary token). The purpose of the manager is to return a password, which the WSE engine will use to compare against the password that

The new policy is added to the configuration file. As you can see in Listing 7-3, this policy does not make any particular reference to the KDC or the Active Directory that will be involved in the brokered authentication process. This information is obtained directly from the machine environment. This simplifies the deployment of Kerberos-based policies, because there aren t parameters to specify in the policy and you don t need to install a certificate as in the case of the MutualCertificatePolicy. Listing 7-3. Changes to the Service Policy File <policy name="KerberosPolicy"> <authorization> <allow user="sieena\mauricio" /> <deny user="*" /> </authorization> <kerberosSecurity establishSecurityContext="false" renewExpiredSecurityContext="true" requireSignatureConfirmation="false" messageProtectionOrder="SignBeforeEncrypt" requireDerivedKeys="true" ttlInSeconds="300"> <protection> <request signatureOptions="IncludeAddressing, IncludeTimestamp, IncludeSoapBody" encryptBody="true" /> <response signatureOptions="IncludeAddressing, IncludeTimestamp, IncludeSoapBody" encryptBody="true" /> <fault signatureOptions="IncludeAddressing, IncludeTimestamp, IncludeSoapBody" encryptBody="false" /> </protection> </kerberosSecurity> <requireActionHeader /> </policy> The next step is to apply this policy to the service. You can do this by finding the place in the StockTrader class where you applied the MutualCertificate Policy and modify the policy name to KerberosPolicy. After this change, the class definition should look like the following: [Policy("KerberosPolicy")] public class StockTrader : StockTraderStub Finally, before moving to the client project, you will need to add the following line in the web.config file, right under the <system.web> tag. This line will allow you to use Integrated Windows Authentication. <authentication mode="Windows" />

The main difference between the three xterm launch lines is the colors used for the foreground and background. The if statements determine whether the remote machine is in a specific IP address range. If it is, we start the xterm with the appropriate

generated the token. If the passwords do not match, then a SOAP fault will be raised. The manager gives you a place to write custom code for validating the authenticated user s password. You could, for example, extract the username from the token and then perform a database lookup to retrieve the user s password. You can then return this password, and WSE will automatically compare it against the token password. Listing 6-8. A Custom Token Manager

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