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Add a Policy Entry with a SignedBy Alias

To grant code signed by susan permission to read any files in the C:\TestData directory, you need to create a policy entry granting this permission. Note that "Code signed by susan" is an abbreviated way of saying "Code in a class file contained in a JAR file, where the JAR file was signed using the private key corresponding to the public key that appears in a keystore certificate in an entry aliased by susan."

Choose the Add Policy Entry button in the main Policy Tool window. This brings up the Policy Entry dialog box:

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Using this dialog box, type the following alias into the SignedBy text box:

susan

Leave the CodeBase text box blank, to grant all code signed by susan the permission, no matter where it comes from.

Note: If you wanted to restrict the permission to just code signed by susan that comes from the C:\Test\ directory, you would type the following URL into the CodeBase text box:

file:/C:/Test/*

To add the permission, choose the Add Permission button. This brings up the Permissions dialog box.

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Do the following.

1. Choose File Permission from the Permission drop-down list. The complete permission type name (java.io.FilePermission) now appears in the text box to the right of the drop-down list.

2. Type the following in the text box to the right of the list labeled Target Name to specify all files in the C:\TestData\ directory:

   C:\TestData\*
   

3. Specify read access by choosing the read option from the Actions drop-down list.

Now the Permissions dialog box looks like the following.

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Choose the OK button. The new permission appears in a line in the Policy Entry dialog, as follows.

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Note: Each backslash in the file path you typed has been replaced with two backslashes, for your convenience. Strings in a policy file are processed by a tokenizer that allows \ to be used as an escape character (for example, \n to indicate a new line), so the policy file requires two backslashes to indicate a single backslash. If you use single backslashes as your directory separators, Policy Tool automatically converts them to double backslashes for you.

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You are now done specifying this policy entry, so choose the Done button in the Policy Entry dialog. The Policy Tool window now contains a line representing the policy entry, showing the SignedBy value, as shown in the following figure.

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