[xmlsec] Signing over multiple files

Aleksey Sanin aleksey at aleksey.com
Thu Sep 20 21:02:15 PDT 2012


You will need to look into win32/ folder and use Microsoft C compiler.
Honestly, I haven't touched Windows for years so it will be hard for
me to give you a better advice.

Another option is of course to use a VM with linux and just run it
through VM.


On 9/20/12 6:53 AM, Mike Peat wrote:
> Thanks for that Aleksey
> Initially I thought I had found a work-around, but I am now back looking
> at the problem from square one again.  Let me explain...
> Another customer of the organisation I am communicating with was using
> xmlsec at the command-line to do this, which is what led me down this
> route initially.
> It turns out that if the document (file) referred to in the <Reference>
> URI attribute is in the _same directory_ as the SOAP document being
> signed, xmlsec actually picks it up OK and includes its hash-value in
> the <Reference> -> <DigestValue> element... problem solved!
> (Apparently...)  However, life is not so simple.
> They are working on a Linux system, while I am cursed with being in
> Windows.  :-(
> They are thus able to have files named "cid:/xxxxxxx/", while I am not
> (no colons allowed in file-names in Windows!).  So I changed the URI
> attribute in my Reference element to just contain a file-name with no
> "cid:" prefix, and that got things working as far as digitally signing
> the whole thing with xmlsec was concerned.  However now I am getting
> messages through to the other party's back-end system, which are being
> rejected because now _it_ can't identify the referred to document: it
> seems that it insists on using that "cid:" scheme.
> So...
> I need to persuade xmlsec to recognise that "cid:" prefix and, in
> effect, ignore it (if the referred-to file-name starts with "cid:",
> replace that with nothing prior to trying to open the file).
> I have got the xmlsec source, but up until now have just been using Igor
> Zlatkovic's Windows binaries.
> I need to (a) get xmlsec to compile in a Win32 environment and (b) know
> where to make the changes in xmlsec (or perhaps one of its libraries) in
> order to create a version which will do what I need.
> I am not really a C/C++ programmer, but I can usually get by in pretty
> much anything (I have been programming since about 1972 - Oh Lord!
> That's 40 years! I'm getting too old for this!).
> What compiler will I need and where do I find the code I will need to
> change?  And what build process do I need to go through?  Is there a
> make file or something similar?
> Alternatively... what would it take to get somebody who actually knows
> what (s)he is doing to do this for us? We don't have much in the way of
> budget, but this is stopping a project that has months of work in it
> dead in its tracks right now, so...
> Mike Peat
> On 14/09/2012 16:57, Aleksey Sanin wrote:
>> Mike,
>> You will probably need to write code to support "cid" URL scheme
>> and resolve references correctly to the MIME attachments:
>> http://www.aleksey.com/xmlsec/api/xmlsec-io.html
>> Aleksey
>> On 9/14/12 7:50 AM, Mike Peat wrote:
>>> Hi
>>> I am using xmlsec at the command line in an ebXML application.  As you
>>> probably know, ebXML uses SOAP-with-attachments (over HTTP) to send its
>>> messages.  The message thus consists of multipart-MIME content in the
>>> HTTP body: the first part being a SOAP document containing (among other
>>> things) the Signature stuff and the second being an XML document which
>>> is the business payload.
>>> The Signature->SignedInfo in the SOAP document needs to contain two
>>> <Reference> elements: one for the SOAP document itself (URI="") and one
>>> for the payload XML (URI="cid:xxxxxxxx", where "xxxxxxxx" is the content
>>> ID of the second MIME part).
>>> I am managing to successfully sign simple SOAP messages with no payload
>>> (and hence no second <Reference> element), but I just can't work out how
>>> to get xmlsec to sign both documents together.  I have tried many
>>> different ways, but to no avail.  I am sure I am missing something
>>> simple, but...  :-(
>>> Any help would be very much appreciated - I've been banging my head off
>>> this brick wall for a week... and it is starting to really hurt!  :-( 
>>> (That takes a while, because my brain is so dense, but even it starts
>>> gets sore eventually!)
>>> TIA
>>> Mike Peat _______________________________________________
>>> xmlsec mailing list
>>> xmlsec at aleksey.com
>>> http://www.aleksey.com/mailman/listinfo/xmlsec 
>> .

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