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C# UWP/WinRT Examples

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(C# UWP/WinRT) Canonicalize XML Fragment

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).

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

// 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";
bool success = await http.QuickGetSbAsync(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>
// 

 

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