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From Butler <tears....@gmail.com>
Subject XMLCipher loadEncryptedKey error
Date Fri, 14 Dec 2007 07:39:23 GMT
Hi all,

I tried to use XMLCipher to load a EncryptedKey element into EncryptedKey
object.

<xenc:EncryptedKey xmlns:xenc="http://www.w3.org/2001/04/xmlenc#" Id="KEK"
Recipient="demo">
  <xenc:EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#rsa-1_5"
/>
  <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
    <ds:KeyName>demo_valid1</ds:KeyName>
  </ds:KeyInfo>
  <xenc:CipherData>

<xenc:CipherValue>a+CJUHCF1q4bSa5dL6oxpcHzsi2Y00dIAPB3cs=</xenc:CipherValue>

  </xenc:CipherData>
  <xenc:ReferenceList>
    <xenc:DataReference URI="#ED"></xenc:DataReference>
  </xenc:ReferenceList>
  <xenc:CarriedKeyName>datakey</xenc:CarriedKeyName>
</xenc:EncryptedKey>

It's ok to load, however, when I try to call the getRecipient() function, it
return null.
After I traced the program, I found the problem is caused by the following
code in XMLCipher.newEncryptedKey(ELement) function:

        try {
            result.setId (element.getAttributeNS(
                    null, EncryptionConstants._ATT_ID));
            result.setType(new URI(
                    element.getAttributeNS(
                        null, EncryptionConstants._ATT_TYPE)).toString());
            result.setMimeType(element.getAttributeNS(
                    null, EncryptionConstants._ATT_MIMETYPE));
            result.setEncoding(new URI(
                    element.getAttributeNS(
                        null, Constants._ATT_ENCODING)).toString());
            result.setRecipient (element.getAttributeNS(
                    null, EncryptionConstants._ATT_RECIPIENT));
        } catch (URI.MalformedURIException mfue) {
            // do nothing
        }

The problem is caused by calling new URI() of _ATT_TYPE & _ATT_ENCODING and
these 2 parameters are not required for EncryptedKey.
it throws MalformedURIException so the recipient is never been set.

sorry for my poor english.

-- 
Butler

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