digtal signature on a SOAP document

[shawrie]

hello
i have to write an application that sends requests using soap/xml to a
web service. The company that hosts the web service requires to be
digtally signed. They have sent me the example file
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Header>
<wsse:Security
xmlns:wsse="http://schemas.xmlsoap.org/ws/2002/07/secext">
<wsse:BinarySecurityToken valueType="wsse:X509v3"
encodingType="wsse:Base64Binary" id="X509Token">
MIIEZzCcA9cgwaABQfd86afd2g...
</wsse:BinarySecurityToken>
<ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
<ds:SignedInfo>
<ds:CanonicalizationMethod>
Algorithm="http://www.w3.org/2001/10/xml-enc-c14n#"/>
</ds:CanonicalizationMethod>
<ds:SignatureMethod Algorithm="
http://www.w3.org/2000/09/xmldsig#rsa-sha1"/>
<ds:Reference URI="#MsgBody">
<ds:Transforms>
<ds:Transform Algorithm="http://www.w3.org/2001/10/xmlexc-
c14n#"/>
</ds:Transforms>
<ds:DigestMethod
Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
<ds:DigestValue>DJbchm5gk...</ds:DigestValue>
</ds:Reference>
</ds:SignedInfo>
<ds:SignatureValue>LyLsF0pi4wPu...</ds:SignatureValue>
<ds:KeyInfo>
<wsse:SecurityTokenReference>
<wsse:Reference URI="#X509Token"/>
</wsse:SecurityTokenReference>
</ds:KeyInfo>
</ds:Signature>
</wsse:Security>
</soap:Header>
<soap:Body id="MsgBody">
<mcr:MailboxCollectRequest
xmlns:mcr="http://www.ros.ie/schemas/customs/collectrequest/v1"/>
</soap:Body>
</soap:Envelope

can someone tell me how i am supposed to digtally sign it and what the
BinarySecurityToken is and worked out??

thanks