C

XML Inclusive Canonicalization

See more XML Digital Signatures Examples

Demonstrates how to convert XML to the Inclusive XML Canonicalization form as specified in http://www.w3.org/TR/xml-c14n/ C

#include <C_CkHttp.h>
#include <C_CkStringBuilder.h>
#include <C_CkXmlDSig.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttp http;
    HCkStringBuilder sbXml;
    HCkXmlDSig canon;
    const char *canonVersion;
    BOOL withComments;
    const char *url;
    const char *xmlInclCanon;
    const char *xmlExclCanon;

    success = FALSE;

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

    // The XML digital signature verification class provides utility methods for
    // XML canonicalization.  This example demonstrates how to do inclusive XML canonicalization.

    http = CkHttp_Create();
    sbXml = CkStringBuilder_Create();
    canon = CkXmlDSig_Create();

    // Use inclusive XML canonicalization.
    canonVersion = "C14N";
    withComments = FALSE;

    url = "https://www.chilkatsoft.com/exampleData/c14n/test7.xml";
    success = CkHttp_QuickGetSb(http,url,sbXml);

    // This is the input XML:
    // The XML comment is referring to when exclusive XML canonicalization is applied.  With inclusive canonicalization, the namespace nodes
    // are kept, as we'll see below..

    // <doc>
    // <!-- A namespace node N is ignored if the nearest ancestor element of the node's parent element that is in the node-set has a namespace node in the node-set with the same local name and value as N. -->
    // 	<animal xmlns:aa="https://www.animal.com/">
    // 		<reptile xmlns:bb="https://www.reptile.com/">
    //   			<lizard xmlns="" type="african fat tailed" abc="xyz" xmlns:aa="https://www.animal.com/" />
    //   			<snake type="poisonous rattler" xmlns:bb="https://www.reptile.com/" >
    //   			</snake>
    //   		</reptile>
    //   	</animal>
    // </doc>

    xmlInclCanon = CkXmlDSig_canonicalizeXml(canon,CkStringBuilder_getAsString(sbXml),canonVersion,withComments);
    printf("%s\n",xmlInclCanon);

    // The C14N (inclusive) canonicalization is:

    // <doc>
    // 
    // 	<animal xmlns:aa="https://www.animal.com/">
    // 		<reptile xmlns:bb="https://www.reptile.com/">
    //   			<lizard abc="xyz" type="african fat tailed"></lizard>
    //   			<snake type="poisonous rattler">
    //   			</snake>
    //   		</reptile>
    //   	</animal>
    // </doc>

    // To see the difference, let's do exclusive canonicalization..
    canonVersion = "EXCL_C14N";

    xmlExclCanon = CkXmlDSig_canonicalizeXml(canon,CkStringBuilder_getAsString(sbXml),canonVersion,withComments);
    printf("%s\n",xmlExclCanon);

    // // The C14N (exclusive) canonicalization is:
    // 
    // <doc>
    // 
    // 	<animal>
    // 		<reptile>
    //   			<lizard abc="xyz" type="african fat tailed"></lizard>
    //   			<snake type="poisonous rattler">
    //   			</snake>
    //   		</reptile>
    //   	</animal>
    // </doc>


    CkHttp_Dispose(http);
    CkStringBuilder_Dispose(sbXml);
    CkXmlDSig_Dispose(canon);

    }