RE: JDOM - Sign validation

chirsmail sapl Fri, 07 Apr 2006 13:11:13 -0700

Yes, you are correct.Here is what i did

1)Converted JDOM to DOM and then signed.

2)Serialized the signed DOM and send it to O/P stream - Attached the file output_DOM.xml

3)Then converted the singed DOM to JDOM

4)Then again covnerted JDOM to DOM Attached file output_DOMFromJDOM.xml

I can see the different that the singed DOM contains

<ds:Reference URI="" xmlns:ds="http://www.w3.org/2000/09/xmldsig#">

and the DOM converted from JDOM after signing contains

<ds:Reference URI="">

The name space is missing xmlns:ds="http://www.w3.org/2000/09/xmldsig#">

I have attached the signed DOM below:

<ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">

- <ds:SignedInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">

<ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" />

<ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" />

- <ds:Reference URI="" xmlns:ds="http://www.w3.org/2000/09/xmldsig#">

- <ds:Transforms xmlns:ds="http://www.w3.org/2000/09/xmldsig#">

<ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" />

<ds:Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" />

</ds:Transforms>

<ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" />

<ds:DigestValue xmlns:ds="http://www.w3.org/2000/09/xmldsig#">8LzJf7lSdxcPiyeb2ApFOPEHVZE=</ds:DigestValue>

</ds:Reference>

</ds:SignedInfo>

<ds:SignatureValue xmlns:ds="http://www.w3.org/2000/09/xmldsig#">VnLYodjEkycbfrkEnbsIjureVSIRCppJLonEf1Bt4Gh2n8DibSF5icHYqWfRU5LjyNifskOyWhzK Ua1s/NfNoS9xeuo3skiQHkGG83eDEcz8/mB+Vot35bR4FL2QGjztDbaEBrzR+4/iD0IUPy3YjiHS Zl3c9jtb/mM1LjYV8oI=</ds:SignatureValue>

- <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">

- <ds:X509Data xmlns:ds="http://www.w3.org/2000/09/xmldsig#">

<ds:X509Certificate xmlns:ds="http://www.w3.org/2000/09/xmldsig#">MIICNDCCAZ0CBEQki2AwDQYJKoZIhvcNAQEEBQAwYTELMAkGA1UEBhMCREUxHTAbBgNVBAoTFFVu aXZlcnNpdHkgb2YgU2llZ2VuMRAwDgYDVQQLEwdGQjEyTlVFMSEwHwYDVQQDExhDaHJpc3RpYW4g R2V1ZXItUG9sbG1hbm4wHhcNMDYwMzI1MDAxNDI0WhcNMTEwOTE1MDAxNDI0WjBhMQswCQYDVQQG EwJERTEdMBsGA1UEChMUVW5pdmVyc2l0eSBvZiBTaWVnZW4xEDAOBgNVBAsTB0ZCMTJOVUUxITAf BgNVBAMTGENocmlzdGlhbiBHZXVlci1Qb2xsbWFubjCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkC gYEAiMyPaBtjyD45i3iNi/ijObw+XrmiMgADOSUAo62MjBK6A1qZb4uwhrF+vSkWfrdpmW1yfH0H UTOAT4pgNc8UWn8WH61LRlj5MBnVF5f32DBqxgXs7K3i42W3xWeMr7cPwuD00qOeisbiLuTSKg8a xsmf+ATnZWBMTpH7O5NtxFsCAwEAATANBgkqhkiG9w0BAQQFAAOBgQB0ZO7ZSvIbtWLKtUrypyEp P+Q5Ly1Fd2++/K+Fr8d6tPxBD0LS0QGmLd2jHHzkf0XX0XanMPpEzW/nDtHJkszRlu9jis/m1VLf 2B91o7arMGpW9M2AhmrNqI5AGnb4m96AsGJr0ZEy4+BfXbx4A4bnhxUlfh5p/7jrCBSQAexU7A==</ds:X509Certificate>

</ds:X509Data>

- <ds:KeyValue xmlns:ds="http://www.w3.org/2000/09/xmldsig#">

- <ds:RSAKeyValue xmlns:ds="http://www.w3.org/2000/09/xmldsig#">

<ds:Modulus xmlns:ds="http://www.w3.org/2000/09/xmldsig#">iMyPaBtjyD45i3iNi/ijObw+XrmiMgADOSUAo62MjBK6A1qZb4uwhrF+vSkWfrdpmW1yfH0HUTOA T4pgNc8UWn8WH61LRlj5MBnVF5f32DBqxgXs7K3i42W3xWeMr7cPwuD00qOeisbiLuTSKg8axsmf +ATnZWBMTpH7O5NtxFs=</ds:Modulus>

<ds:Exponent xmlns:ds="http://www.w3.org/2000/09/xmldsig#">AQAB</ds:Exponent>

</ds:RSAKeyValue>

</ds:KeyValue>

</ds:KeyInfo>

</ds:Signature>

I have attached the signed DOM from JDOM for validation below:

<ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">

- <ds:SignedInfo>

<ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />

<ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />

- <ds:Reference URI="">

- <ds:Transforms>

<ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />

<ds:Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments" />

</ds:Transforms>

<ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />

<ds:DigestValue>8LzJf7lSdxcPiyeb2ApFOPEHVZE=</ds:DigestValue>

</ds:Reference>

</ds:SignedInfo>

<ds:SignatureValue>VnLYodjEkycbfrkEnbsIjureVSIRCppJLonEf1Bt4Gh2n8DibSF5icHYqWfRU5LjyNifskOyWhzK Ua1s/NfNoS9xeuo3skiQHkGG83eDEcz8/mB+Vot35bR4FL2QGjztDbaEBrzR+4/iD0IUPy3YjiHS Zl3c9jtb/mM1LjYV8oI=</ds:SignatureValue>

- <ds:KeyInfo>

- <ds:X509Data>

<ds:X509Certificate>MIICNDCCAZ0CBEQki2AwDQYJKoZIhvcNAQEEBQAwYTELMAkGA1UEBhMCREUxHTAbBgNVBAoTFFVu aXZlcnNpdHkgb2YgU2llZ2VuMRAwDgYDVQQLEwdGQjEyTlVFMSEwHwYDVQQDExhDaHJpc3RpYW4g R2V1ZXItUG9sbG1hbm4wHhcNMDYwMzI1MDAxNDI0WhcNMTEwOTE1MDAxNDI0WjBhMQswCQYDVQQG EwJERTEdMBsGA1UEChMUVW5pdmVyc2l0eSBvZiBTaWVnZW4xEDAOBgNVBAsTB0ZCMTJOVUUxITAf BgNVBAMTGENocmlzdGlhbiBHZXVlci1Qb2xsbWFubjCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkC gYEAiMyPaBtjyD45i3iNi/ijObw+XrmiMgADOSUAo62MjBK6A1qZb4uwhrF+vSkWfrdpmW1yfH0H UTOAT4pgNc8UWn8WH61LRlj5MBnVF5f32DBqxgXs7K3i42W3xWeMr7cPwuD00qOeisbiLuTSKg8a xsmf+ATnZWBMTpH7O5NtxFsCAwEAATANBgkqhkiG9w0BAQQFAAOBgQB0ZO7ZSvIbtWLKtUrypyEp P+Q5Ly1Fd2++/K+Fr8d6tPxBD0LS0QGmLd2jHHzkf0XX0XanMPpEzW/nDtHJkszRlu9jis/m1VLf 2B91o7arMGpW9M2AhmrNqI5AGnb4m96AsGJr0ZEy4+BfXbx4A4bnhxUlfh5p/7jrCBSQAexU7A==</ds:X509Certificate>

</ds:X509Data>

- <ds:KeyValue>

- <ds:RSAKeyValue>

<ds:Modulus>iMyPaBtjyD45i3iNi/ijObw+XrmiMgADOSUAo62MjBK6A1qZb4uwhrF+vSkWfrdpmW1yfH0HUTOA T4pgNc8UWn8WH61LRlj5MBnVF5f32DBqxgXs7K3i42W3xWeMr7cPwuD00qOeisbiLuTSKg8axsmf +ATnZWBMTpH7O5NtxFs=</ds:Modulus>

<ds:Exponent>AQAB</ds:Exponent>

</ds:RSAKeyValue>

</ds:KeyValue>

</ds:KeyInfo>

</ds:Signature>

can you help me get original DOM out of JDOM

Thanks

Chris,
Jesse Pelton <[EMAIL PROTECTED]> wrote:

So, if you serialize the original DOM (canonicalized), convert to JDOM, convert back to DOM, and serialize the resulting DOM (canonicalized), how do the two serializations differ? It sounds like the content of the document is being changed in some non-trivial way somewhere in the JDOM <-> DOM conversion. The point of canonicalization is to factor out insignificant changes (like attribute ordering), but one or both of the conversions appears to introduce something that C14N cannot accommodate. If you can attach the two serializations of a given (small) document, that might help diagnose the problem.

From: chirsmail sapl [mailto:[EMAIL PROTECTED]
Sent: Friday, April 07, 2006 2:08 PM
To: [email protected]
Subject: Re: JDOM - Sign validation

One more point to add is that singed DOM validates.But the singed DOM converted to JDOM and then DOM out of JDOM doesnt validate.

Martin Labarthe Dubois <[EMAIL PROTECTED]> wrote:

you can try saving the XML to a file, and reading from it,

when traspasing from one format to another and viceversa. JDOM <-> DOM

moreover, i usually use IBMXMLSecurity suite to test the file just

typing

java dsig.VerifyGUI "filename.xml"

----- Original Message -----

From: chirsmail sapl

To: [email protected]

Sent: Friday, April 07, 2006 2:31 PM

Subject: Re: JDOM - Sign validation

thanks for the reply.When i print DOM and DOM converted from JDOM seems to be same.I see lot of difference on the object level of signed DOM and DOM converted from JDOM.Because the signing of DOM converted from JDOM work well.After updating the DOM into JDOM and then convert the JDOM back to DOM ,the vaildation fails.

I think if i get the exact singed DOM out of JDOM , i should be able to valid the sign.But don't know how to get the exact DOM out of JDOM for validation.

Martin Labarthe Dubois <[EMAIL PROTECTED]> wrote:

Yes. in this case i also saw both of them identical from the c14n perspective.

You must have some other difference.

----- Original Message -----

From: David Wall - Yozons Inc.

To: [email protected]

Sent: Friday, April 07, 2006 2:09 PM

Subject: Re: JDOM - Sign validation

Thanks for the reply.

1)The different is on the byte level.When we print the byte of the orignal DOM and DOM converted from JDOM , the size is different.

2)The DOM converted from JDOM has the white space if the element doesn't have the values.

For example :

Orignal XML content:

<?xml version="1.0" encoding="UTF-8"?>
<div id="main"></div>

DOM o/p using XMLUtils.outputDOMc14nWithComments(

<div id="main"></div>

JDOM O/P converted from DOM using XMLOutputter:

<?xml version="1.0" encoding="UTF-8"?>

<div id="main" />

I think thats why it doesn't valid the DOM converted from JDOM.

Can any expert suggest me a way to resolve the issue.
Isn't the point of canonicalization to remove such problems from syntactically equivalent XML? It seems that the element is the same, has the same value and same attributes with the same values, so they should be treated as the same data from a digital signing perspective.

David

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RE: JDOM - Sign validation

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