convertcert.html

来自「java类库详细讲解」· HTML 代码 · 共 98 行

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<TITLE>Converting Between javax and java X509Certificates
(Java Developers Almanac Example)
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    <B><A HREF="../javax.security.cert/pkg.html">javax.security.cert</A></B><font color="#666666" SIZE="-2">
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  <h3>
    e506.  
    Converting Between javax and java X509Certificates</h3>

Some methods in the javax.net.ssl package create certificate objects
that are not compatible with the certificate objects in the
<code>java.security.cert</code> package.  This example implements two methods that
convert between the two types of certificate objects.


<pre>
    // Converts to java.security
    public static java.security.cert.X509Certificate convert(javax.security.cert.X509Certificate cert) {
        try {
            byte[] encoded = cert.getEncoded();
            ByteArrayInputStream bis = new ByteArrayInputStream(encoded);
            java.security.cert.CertificateFactory cf
                = java.security.cert.CertificateFactory.getInstance("X.509");
            return (java.security.cert.X509Certificate)cf.generateCertificate(bis);
        } catch (java.security.cert.CertificateEncodingException e) {
        } catch (javax.security.cert.CertificateEncodingException e) {
        } catch (java.security.cert.CertificateException e) {
        }
        return null;
    }
    
    // Converts to javax.security
    public static javax.security.cert.X509Certificate convert(java.security.cert.X509Certificate cert) {
        try {
            byte[] encoded = cert.getEncoded();
            return javax.security.cert.X509Certificate.getInstance(encoded);
        } catch (java.security.cert.CertificateEncodingException e) {
        } catch (javax.security.cert.CertificateEncodingException e) {
        } catch (javax.security.cert.CertificateException e) {
        }
        return null;
    }
</pre>

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