Requesting Privileges and Signing Your JavaScript Code in Java

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Requesting Privileges and Signing Your JavaScript Code
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If the LDAP server is running on a different machine from your Web server, you need to request permission to connect to the LDAP server 8 covers permissions in detail (see the section on writing LDAP applets for Netscape Navigator in that chapter for more information) The following excerpt from jsldaphtml illustrates how to request permission to connect to the LDAP server
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// Create a connection conn = new LDAPConnection(); // Ask the user for permission to establish a remote // connection netscapesecurityPrivilegeManagerenablePrivilege( "UniversalConnect"); netscapesecurityPrivilegeManagerenablePrivilege( "UniversalPropertyRead"); // Connect to selected host connconnect( 3, // LDAPv3
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Accessing Java Objects from JavaScript 263
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documentLDAPFormhostvalue, parseInt(documentLDAPFormportvalue), "", // Anonymous "" );
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Next you need to sign your JavaScript code Netscape s signtool utility allows you to sign inline JavaScript code For details on signing code, getting certi cates, and using signtool, see 8 In the <SCRIPT> tag that surrounds your JavaScript functions, set the ARCHIVE attribute to the name of a JAR le (signtool will create this JAR le as part of the process of signing the scripts), and set the ID attribute to a unique identi er for each script section in the le This ID will identify the signed script segments in the generated JAR le:
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<SCRIPT LANGUAGE="JavaScript" ARCHIVE="JSLDAPHTMLjar" ID="1"> // Do a subtree search function doSearch() { } </SCRIPT>
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If you have event handlers for a tag (for example, a function to be called when a button is clicked), you also need to include an ID attribute in the tag You do not need to specify separate ARCHIVE attributes for event handlers, as long as they are preceded by a script with the ARCHIVE attribute These event handler scripts will be placed in the same JAR le as the preceding script:
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<INPUT TYPE=button VALUE= search onClick= doSearch() ID= 2 >
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When you run signtool, it creates subdirectories named <jarfile>arc and <jarfilearc>\inlineScripts For each tag with an ID, signtool extracts the inline JavaScript code to a le named after the ID The signtool utility places these les into the inlineScripts directory As with signed Java applets (see 8), signtool creates a META-INF subdirectory, as well as a manifestmf le (containing the name and a hash of each le to be signed), a zigbertsf signature instruction le (containing a hash of each section in manifestmf), and a zigbertrsa digital signature le (containing a hash of the zigbertsf le encrypted with the private key, as well as the certi cate for that key) The signtool utility puts the contents of the META-INF and inlineScripts directories in a JAR le and removes the arc directory and all temporary les To sign inline JavaScript code with signtool, use the following syntax:
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signtool -d <cert_dir> -k <cert_name> -J <code_dir>
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264 Scripting LDAP: JavaScript and Java
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where <cert_dir> speci es the location of your certi cate database and your key database For example, in Windows this is typically
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C:\Program Files\Netscape\Users\<yourname>
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<cert_name> speci es the object-signing certi cate <code_dir> speci es the directory containing the HTML les that have JavaScript code you want to sign The following example demonstrates how to sign your code The example uses the TestCerti cate certi cate to sign the JavaScript code in any HTML les located in the html directory If you place jsldaphtml in that directory, signtool will create a JAR le named JSLDAPHTMLjar (as speci ed by the ARCHIVE attribute of the SCRIPT tag in jsldaphtml) The example expects to nd the certi cate and key databases in the directory D:\Program Files\Netscape\Users\username The information you need to enter is highlighted in bold
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D:\sourcefiles>signtool -k TestCertificate -d "D:\Program Files\Netscape\Users\username" -J html using key "TestCertificate" using certificate directory: D:\Program Files\Netscape\Users\username Generating inline signatures from HTML files in: html Processing HTML file: jsldaphtml signing: html/JSLDAPHTMLjar Generating html/JSLDAPHTMLarc/META-INF/manifestmf file > inlineScripts/1 > inlineScripts/2 > inlineScripts/3 Generating zigbertsf file adding html/JSLDAPHTMLarc/META-INF/manifestmf to html/ JSLDAPHTMLjar(deflated 46%) adding html/JSLDAPHTMLarc/META-INF/zigbertsf to html/ JSLDAPHTMLjar(deflated 41%) adding html/JSLDAPHTMLarc/META-INF/zigbertrsa to html/ JSLDAPHTMLjar(deflated 38%) jarfile "html/JSLDAPHTMLjar" signed successfully removing: html/JSLDAPHTMLarc Directory html signed successfully
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Note that if you make any changes to the HTML le (even adding or deleting spaces), you need to sign the le and generate the JAR le again
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