C
C
Generate a CSR containing an Extension Request
See more CSR Examples
Demonstrates how to generate a CSR containing a 1.2.840.113549.1.9.14 extensionRequest.Chilkat C Downloads
#include <C_CkEcc.h>
#include <C_CkPrng.h>
#include <C_CkPrivateKey.h>
#include <C_CkCsr.h>
#include <C_CkXml.h>
void ChilkatSample(void)
{
BOOL success;
HCkEcc ecc;
HCkPrng prng;
HCkPrivateKey privKey;
HCkCsr csr;
HCkXml xml;
const char *csrPem;
success = FALSE;
// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// This example will generate a secp256r1 ECDSA key for the CSR.
ecc = CkEcc_Create();
prng = CkPrng_Create();
privKey = CkPrivateKey_Create();
success = CkEcc_GenKey(ecc,"secp256r1",prng,privKey);
if (success == FALSE) {
printf("Failed to generate a new ECDSA private key.\n");
CkEcc_Dispose(ecc);
CkPrng_Dispose(prng);
CkPrivateKey_Dispose(privKey);
return;
}
csr = CkCsr_Create();
// Add common CSR fields:
CkCsr_putCommonName(csr,"mysubdomain.mydomain.com");
CkCsr_putCountry(csr,"GB");
CkCsr_putState(csr,"Yorks");
CkCsr_putLocality(csr,"York");
CkCsr_putCompany(csr,"Internet Widgits Pty Ltd");
CkCsr_putEmailAddress(csr,"support@mydomain.com");
// Add the following 1.2.840.113549.1.9.14 extensionRequest
// Note: The easiest way to know the content and format of the XML to be added is to examine
// a pre-existing CSR with the same desired extensionRequest. You can use Chilkat to
// get the extensionRequest from an existing CSR.
//
// Here is a sample extension request:
// <?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 code from sample XML:
// Generate Code to Create XML
// Here's the code to generate the above extension request.
xml = CkXml_Create();
CkXml_putTag(xml,"set");
CkXml_UpdateChildContent(xml,"sequence|sequence|oid","1.3.6.1.4.1.311.20.2");
CkXml_UpdateChildContent(xml,"sequence|sequence|asnOctets|printable","ZATCA-Code-Signing");
CkXml_UpdateChildContent(xml,"sequence|sequence[1]|oid","2.5.29.17");
CkXml_UpdateAttrAt(xml,"sequence|sequence[1]|asnOctets|sequence|contextSpecific",TRUE,"tag","4");
CkXml_UpdateAttrAt(xml,"sequence|sequence[1]|asnOctets|sequence|contextSpecific",TRUE,"constructed","1");
CkXml_UpdateChildContent(xml,"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set|sequence|oid","2.5.4.4");
CkXml_UpdateChildContent(xml,"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set|sequence|utf8","334623324234325");
CkXml_UpdateChildContent(xml,"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[1]|sequence|oid","0.9.2342.19200300.100.1.1");
CkXml_UpdateChildContent(xml,"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[1]|sequence|utf8","310122393500003");
CkXml_UpdateChildContent(xml,"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[2]|sequence|oid","2.5.4.12");
CkXml_UpdateChildContent(xml,"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[2]|sequence|utf8","0000");
CkXml_UpdateChildContent(xml,"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[3]|sequence|oid","2.5.4.26");
CkXml_UpdateChildContent(xml,"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[3]|sequence|utf8","Sample E");
CkXml_UpdateChildContent(xml,"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[4]|sequence|oid","2.5.4.15");
CkXml_UpdateChildContent(xml,"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[4]|sequence|utf8","Sample Business");
// Add the extension request to the CSR
CkCsr_SetExtensionRequest(csr,xml);
// Generate the CSR with the extension request
csrPem = CkCsr_genCsrPem(csr,privKey);
if (CkCsr_getLastMethodSuccess(csr) == FALSE) {
printf("%s\n",CkCsr_lastErrorText(csr));
CkEcc_Dispose(ecc);
CkPrng_Dispose(prng);
CkPrivateKey_Dispose(privKey);
CkCsr_Dispose(csr);
CkXml_Dispose(xml);
return;
}
printf("%s\n",csrPem);
// Sample PEM output:
// -----BEGIN CERTIFICATE REQUEST-----
// MIICEjCCAbkCAQAwgZcxITAfBgNVBAMMGG15c3ViZG9tYWluLm15ZG9tYWluLmNv
// bTELMAkGA1UEBhMCR0IxDjAMBgNVBAgMBVlvcmtzMQ0wCwYDVQQHDARZb3JrMSEw
// HwYDVQQKDBhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxIzAhBgkqhkiG9w0BCQEW
// FHN1cHBvcnRAbXlkb21haW4uY29tMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE
// g8EVNSV0ttlM9kG2E+J3ZB9WEDYVf2QA/8idrPRUafia1CHjd1kslwZA8eP2bAcf
// 2O493QAENqtW6DTHJbRz8KCBvjCBuwYJKoZIhvcNAQkOMYGtMIGqMCEGCSsGAQQB
// gjcUAgQUExJaQVRDQS1Db2RlLVNpZ25pbmcwgYQGA1UdEQR9MHukeTB3MRgwFgYD
// VQQEDA8zMzQ2MjMzMjQyMzQzMjUxHzAdBgoJkiaJk/IsZAEBDA8zMTAxMjIzOTM1
// MDAwMDMxDTALBgNVBAwMBDAwMDAxETAPBgNVBBoMCFNhbXBsZSBFMRgwFgYDVQQP
// DA9TYW1wbGUgQnVzaW5lc3MwCgYIKoZIzj0EAwIDRwAwRAIgF7D30eSBklfo+oel
// 1B0z64eJDB9MB3rCoiFZlj+mz0YCIHYI87eyqdtw2LOcAoBRhyxlBT6i28+Z/8t9
// bYsMIYvp
// -----END CERTIFICATE REQUEST-----
CkEcc_Dispose(ecc);
CkPrng_Dispose(prng);
CkPrivateKey_Dispose(privKey);
CkCsr_Dispose(csr);
CkXml_Dispose(xml);
}