(C) Generate CSR with Uncommon Fields

See more CSR Examples

Demonstrates how to generate a new RSA key and a Certificate Signing Request (CSR) for this:

csr.common.name=Admin forInformation-MainShop
csr.serial.number=1-XYZ|2-2.0|3-999695
csr.organization.identifier=990099994100099
csr.organization.unit.name=9999910000
csr.organization.name=9999910000
csr.country.name=SA
csr.invoice.type=1100
csr.location.address=King Fahed Road
csr.industry.business.category=MainOffice

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#include <C_CkRsa.h>
#include <C_CkPrivateKey.h>
#include <C_CkCsr.h>
#include <C_CkFileAccess.h>

void ChilkatSample(void)
    {
    HCkRsa rsa;
    BOOL success;
    HCkPrivateKey privKey;
    HCkCsr csr;
    const char *pemStr;
    HCkFileAccess fac;

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

    // First generate an RSA private key.
    rsa = CkRsa_Create();

    // Generate a random 2048-bit RSA key.
    success = CkRsa_GenerateKey(rsa,2048);
    if (success != TRUE) {
        printf("%s\n",CkRsa_lastErrorText(rsa));
        CkRsa_Dispose(rsa);
        return;
    }

    // Get the private key
    privKey = CkRsa_ExportPrivateKeyObj(rsa);

    // Create the CSR object and set properties.
    csr = CkCsr_Create();

    CkCsr_putCommonName(csr,"Admin forInformation-MainShop");

    // Country Name (2 letter code)
    CkCsr_putCountry(csr,"SA");

    // Organization Name (eg, company)
    CkCsr_putCompany(csr,"9999910000");

    // Organizational Unit Name (eg, secion/division)
    CkCsr_putCompanyDivision(csr,"9999910000");

    // See https://www.alvestrand.no/objectid/2.5.4.html for OIDs for the following fields:

    // csr.serial.number=1-XYZ|2-2.0|3-999695
    // 2.5.4.5 - id-at-serialNumber 
    CkCsr_SetSubjectField(csr,"2.5.4.5","1-XYZ|2-2.0|3-999695","UTF8String");

    // csr.organization.identifier=990099994100099
    // 2.5.4.45 - id-at-uniqueIdentifier   Don't know if this is correct.
    CkCsr_SetSubjectField(csr,"2.5.4.45","1100","UTF8String");

    // csr.invoice.type=1100
    // Don't know what this OID would be...
    CkCsr_SetSubjectField(csr,"2.5.4.99","1100","UTF8String");

    // csr.location.address=King Fahed Road
    // 2.5.4.9 - id-at-streetAddress 
    CkCsr_SetSubjectField(csr,"2.5.4.9","King Fahed Road","UTF8String");

    // csr.industry.business.category=MainOffice
    // 2.5.4.15 - id-at-businessCategory 
    CkCsr_SetSubjectField(csr,"2.5.4.15","MainOffice","UTF8String");

    // Create the CSR using the private key.
    pemStr = CkCsr_genCsrPem(csr,privKey);
    if (CkCsr_getLastMethodSuccess(csr) != TRUE) {
        printf("%s\n",CkCsr_lastErrorText(csr));
        CkPrivateKey_Dispose(privKey);
        CkRsa_Dispose(rsa);
        CkCsr_Dispose(csr);
        return;
    }

    // Save the private key and CSR to a files.
    CkPrivateKey_SavePkcs8EncryptedPemFile(privKey,"password","qa_output/privKey1.pem");
    CkPrivateKey_Dispose(privKey);

    fac = CkFileAccess_Create();
    CkFileAccess_WriteEntireTextFile(fac,"qa_output/csr1.pem",pemStr,"utf-8",FALSE);

    // Show the CSR.
    printf("%s\n",pemStr);

    // Sample output:
    // The CSR PEM can be checked here:
    // https://www.networking4all.com/en/support/tools/csr+check/
    // Copy-and-paste the PEM into the online CSR Decoding / CSR Verification form

    // 	-----BEGIN CERTIFICATE REQUEST-----
    // 	MIIC6jCCAdICAQAwgaQxITAfBgNVBAMMGG15c3ViZG9tYWluLm15ZG9tYWluLmNv
    // ...
    // ...
    // 	hJnYCvjzFz4O9VtT+JtP9ldRHWV3KpZ8ne3AjD+F
    // 	-----END CERTIFICATE REQUEST-----


    CkRsa_Dispose(rsa);
    CkCsr_Dispose(csr);
    CkFileAccess_Dispose(fac);

    }