Unicode C
Unicode 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 Unicode C Downloads
#include <C_CkEccW.h>
#include <C_CkPrngW.h>
#include <C_CkPrivateKeyW.h>
#include <C_CkCsrW.h>
#include <C_CkXmlW.h>
void ChilkatSample(void)
{
BOOL success;
HCkEccW ecc;
HCkPrngW prng;
HCkPrivateKeyW privKey;
HCkCsrW csr;
HCkXmlW xml;
const wchar_t *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 = CkEccW_Create();
prng = CkPrngW_Create();
privKey = CkPrivateKeyW_Create();
success = CkEccW_GenKey(ecc,L"secp256r1",prng,privKey);
if (success == FALSE) {
wprintf(L"Failed to generate a new ECDSA private key.\n");
CkEccW_Dispose(ecc);
CkPrngW_Dispose(prng);
CkPrivateKeyW_Dispose(privKey);
return;
}
csr = CkCsrW_Create();
// Add common CSR fields:
CkCsrW_putCommonName(csr,L"mysubdomain.mydomain.com");
CkCsrW_putCountry(csr,L"GB");
CkCsrW_putState(csr,L"Yorks");
CkCsrW_putLocality(csr,L"York");
CkCsrW_putCompany(csr,L"Internet Widgits Pty Ltd");
CkCsrW_putEmailAddress(csr,L"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 = CkXmlW_Create();
CkXmlW_putTag(xml,L"set");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence|oid",L"1.3.6.1.4.1.311.20.2");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence|asnOctets|printable",L"ZATCA-Code-Signing");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence[1]|oid",L"2.5.29.17");
CkXmlW_UpdateAttrAt(xml,L"sequence|sequence[1]|asnOctets|sequence|contextSpecific",TRUE,L"tag",L"4");
CkXmlW_UpdateAttrAt(xml,L"sequence|sequence[1]|asnOctets|sequence|contextSpecific",TRUE,L"constructed",L"1");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set|sequence|oid",L"2.5.4.4");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set|sequence|utf8",L"334623324234325");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[1]|sequence|oid",L"0.9.2342.19200300.100.1.1");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[1]|sequence|utf8",L"310122393500003");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[2]|sequence|oid",L"2.5.4.12");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[2]|sequence|utf8",L"0000");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[3]|sequence|oid",L"2.5.4.26");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[3]|sequence|utf8",L"Sample E");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[4]|sequence|oid",L"2.5.4.15");
CkXmlW_UpdateChildContent(xml,L"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[4]|sequence|utf8",L"Sample Business");
// Add the extension request to the CSR
CkCsrW_SetExtensionRequest(csr,xml);
// Generate the CSR with the extension request
csrPem = CkCsrW_genCsrPem(csr,privKey);
if (CkCsrW_getLastMethodSuccess(csr) == FALSE) {
wprintf(L"%s\n",CkCsrW_lastErrorText(csr));
CkEccW_Dispose(ecc);
CkPrngW_Dispose(prng);
CkPrivateKeyW_Dispose(privKey);
CkCsrW_Dispose(csr);
CkXmlW_Dispose(xml);
return;
}
wprintf(L"%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-----
CkEccW_Dispose(ecc);
CkPrngW_Dispose(prng);
CkPrivateKeyW_Dispose(privKey);
CkCsrW_Dispose(csr);
CkXmlW_Dispose(xml);
}