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https://issues.apache.org/jira/browse/CXF-5381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13818221#comment-13818221
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Andrei Shakirin commented on CXF-5381:
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Short note: the code work without problem in CXF 2.5.2.
In that version SAAJInInterceptor uses StaxUtils.copy(node, new 
W3CDOMStreamWriter(part)); to copy message content.
It seems that problem is caused by the SAAJStreamWriter.

> SAAJStreamWriter transforms DigestValue of custom signature
> -----------------------------------------------------------
>
>                 Key: CXF-5381
>                 URL: https://issues.apache.org/jira/browse/CXF-5381
>             Project: CXF
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 2.7.7
>            Reporter: Andrei Shakirin
>         Attachments: saaj_test.zip
>
>
> I observe strange effect by processing custom signature in service inbound 
> chain. End exception is: "Caused by: 
> org.apache.xml.security.exceptions.Base64DecodingException: Error while 
> decoding".
> After a bit analyze I found that DigestValue of Signature is concatinated 
> with DigestValue of another signature and therefore cannot be proceed by xml 
> security (santuario).
> Additional debugging shows that signature is broken by StaxUtils.copy(node, 
> new SAAJStreamWriter(part)); in SAAJInInterceptor. 
> Value in node is still correct, but value in SOAPMessage is broken.
> I attach a small project to illustrate the issue. Run mvn clean test for the 
> project and compare DigestValue of Signature 
> SIG-7D02FBC5A7AED81312138383830534822 in original request.xml and in output.



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