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(C#) Canonicalize XML FragmentDemonstrates 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).
// 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 = 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> // |
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