(C) CSR Get Extension Request

See more CSR Examples

If a CSR contains a 1.2.840.113549.1.9.14 extensionRequest, then this method will return the extension request in XML format.

Note: This example requires Chilkat v9.5.0.91 or greater.

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#include <C_CkCsr.h>
#include <C_CkFileAccess.h>
#include <C_CkXml.h>

void ChilkatSample(void)
    {
    HCkCsr csr;
    HCkFileAccess fac;
    const char *csrPem;
    BOOL success;
    HCkXml xml;
    const char *xmlStr;

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

    csr = CkCsr_Create();

    // Load a CSR PEM file.  The file should contain content that looks like this:
    // 
    // 	-----BEGIN CERTIFICATE REQUEST-----
    // 	MII...
    // 	....
    // 	....
    // 	....
    // 	-----END CERTIFICATE REQUEST-----

    fac = CkFileAccess_Create();
    csrPem = CkFileAccess_readEntireTextFile(fac,"qa_data/csr/sample.pem","utf-8");

    success = CkCsr_LoadCsrPem(csr,csrPem);
    if (success != TRUE) {
        printf("%s\n",CkCsr_lastErrorText(csr));
        CkCsr_Dispose(csr);
        CkFileAccess_Dispose(fac);
        return;
    }

    xml = CkXml_Create();

    success = CkCsr_GetExtensionRequest(csr,xml);
    if (success != TRUE) {
        printf("CSR has no extensionRequest.\n");
        CkCsr_Dispose(csr);
        CkFileAccess_Dispose(fac);
        CkXml_Dispose(xml);
        return;
    }

    xmlStr = CkXml_getXml(xml);
    printf("%s\n",xmlStr);

    // Sample output:

    // <?xml version="1.0" encoding="utf-8"?>
    // <set>
    //     <sequence>
    //         <sequence>
    //             <oid>1.3.6.1.4.1.311.20.2</oid>
    //             <asnOctets>
    //                 <printable>ZATCA-Code-Signing</printable>
    //             </asnOctets>
    //         </sequence>
    //         <sequence>
    //             <oid>2.5.29.17</oid>
    //             <asnOctets>
    //                 <sequence>
    //                     <contextSpecific tag="4" constructed="1">
    //                         <sequence>
    //                             <set>
    //                                 <sequence>
    //                                     <oid>2.5.4.4</oid>
    //                                     <utf8>334623324234325</utf8>
    //                                 </sequence>
    //                             </set>
    //                             <set>
    //                                 <sequence>
    //                                     <oid>0.9.2342.19200300.100.1.1</oid>
    //                                     <utf8>310122393500003</utf8>
    //                                 </sequence>
    //                             </set>
    //                             <set>
    //                                 <sequence>
    //                                     <oid>2.5.4.12</oid>
    //                                     <utf8>0000</utf8>
    //                                 </sequence>
    //                             </set>
    //                             <set>
    //                                 <sequence>
    //                                     <oid>2.5.4.26</oid>
    //                                     <utf8>Sample E</utf8>
    //                                 </sequence>
    //                             </set>
    //                             <set>
    //                                 <sequence>
    //                                     <oid>2.5.4.15</oid>
    //                                     <utf8>Sample Business</utf8>
    //                                 </sequence>
    //                             </set>
    //                         </sequence>
    //                     </contextSpecific>
    //                 </sequence>
    //             </asnOctets>
    //         </sequence>
    //     </sequence>
    // </set>

    // Use this online tool to generate parsing code from sample XML: 
    // Generate Parsing Code from XML


    CkCsr_Dispose(csr);
    CkFileAccess_Dispose(fac);
    CkXml_Dispose(xml);

    }