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POHow to import a .cer certificate into a java keystore?
 

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    <p>During the development of a Java webservice client I ran into a problem. Authentication for the webservice is using a client certificate, a username and a password. The client certificate I received from the company behind the webservice is in <code>.cer</code> format. When I inspect the file using a text editor, it has the following contents:</p> <pre><code>-----BEGIN CERTIFICATE----- [Some base64 encoded data] -----END CERTIFICATE----- </code></pre> <p>I can import this file as a certificate in Internet Explorer (without having to enter a password!) and use it to authenticate with the webservice.</p> <p>I was able to import this certificate into a keystore by first stripping the first and last line, converting to unix newlines and running a base64-decode. The resulting file can be imported into a keystore (using the <code>keytool</code> command). When I list the entries in the keystore, this entry is of the type <code>trustedCertEntry</code>. Because of this entry type (?) I cannot use this certificate to authenticate with the webservice. I'm beginning to think that the provided certificate is a public certificate which is being used for authentication...</p> <p>A workaround I have found is to import the certificate in IE and export it as a <code>.pfx</code> file. This file can be loaded as a keystore and can be used to authenticate with the webservice. However I cannot expect my clients to perform these steps every time they receive a new certificate. So I would like to load the <code>.cer</code> file directly into Java. Any thoughts?</p> <p>Additional info: the company behind the webservice told me that the certificate should be requested (using IE &amp; the website) from the PC and user that would import the certificate later.</p>
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