C#

Canonicalize XML Fragment

See more XML Digital Signatures Examples

Demonstrates how to canonicalize a fragment of an XML document. The fragment is identified by the element having an Id attribute equal to a specified value. (The Id attribute can have any namespace, and the attribute name is case-insensitive (thus "ID", "Id", "id", etc. match). C#

bool success = false;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

Chilkat.Http http = new Chilkat.Http();
Chilkat.StringBuilder sbXml = new Chilkat.StringBuilder();
Chilkat.XmlDSig canon = new Chilkat.XmlDSig();

//  Use exclusive XML canonicalization.
string canonVersion = "EXCL_C14N";
bool withComments = false;
//  The optional inclusive namespaces prefix list if using exclusive canonicalization.
string prefixList = "";

string url = "https://www.chilkatsoft.com/exampleData/canonicalizeFragmentTest.xml";
success = http.QuickGetSb(url,sbXml);

//  This is the input XML:

//  <?xml version="1.0" encoding="UTF-8"?>
//  <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
//  <SignedInfo>
//    <CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
//    <SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />
//    <Reference URI="#object">
//      <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />
//      <DigestValue>OPnpF/ZNLDxJ/I+1F3iHhlmSwgo=</DigestValue>
//    </Reference>
//  </SignedInfo>
//  <SignatureValue>nihUFQg4mDhLgecvhIcKb9Gz8VRTOlw+adiZOBBXgK4JodEe5aFfCqm8WcRIT8GL
//  LXSk8PsUP4//SsKqUBQkpotcAqQAhtz2v9kCWdoUDnAOtFZkd/CnsZ1sge0ndha4
//  0wWDV+nOWyJxkYgicvB8POYtSmldLLepPGMz+J7/Uws=</SignatureValue>
//  <KeyInfo>
//    <KeyValue>
//      <RSAKeyValue>
//        <Modulus>4IlzOY3Y9fXoh3Y5f06wBbtTg94Pt6vcfcd1KQ0FLm0S36aGJtTSb6pYKfyX7PqC
//        UQ8wgL6xUJ5GRPEsu9gyz8ZobwfZsGCsvu40CWoT9fcFBZPfXro1Vtlh/xl/yYHm
//        +Gzqh0Bw76xtLHSfLfpVOrmZdwKmSFKMTvNXOFd0V18=</Modulus>
//        <Exponent>AQAB</Exponent>
//      </RSAKeyValue>
//    </KeyValue>
//  </KeyInfo>
//  <Object Id="object">some text
//    with spaces and CR-LF.</Object>
//  </Signature>

//  Canonicalize and return the fragment of XML starting at the element where the Id attribute equals "object".
string xmlCanonFrag = canon.CanonicalizeFragment(sbXml.GetAsString(),"object",canonVersion,prefixList,withComments);
Debug.WriteLine(xmlCanonFrag);

//  The output is:
//  
//  <Object xmlns="http://www.w3.org/2000/09/xmldsig#" Id="object">some text
//    with spaces and CR-LF.</Object>
//