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

// First generate an RSA private key.
Chilkat.Rsa rsa = new Chilkat.Rsa();

// Generate a random 2048-bit RSA key.
bool success = rsa.GenerateKey(2048);
if (success != true) {
    Debug.WriteLine(rsa.LastErrorText);
    return;
}

// Get the private key
Chilkat.PrivateKey privKey = rsa.ExportPrivateKeyObj();

// Create the CSR object and set properties.
Chilkat.Csr csr = new Chilkat.Csr();

csr.CommonName = "Admin forInformation-MainShop";

// Country Name (2 letter code)
csr.Country = "SA";

// Organization Name (eg, company)
csr.Company = "9999910000";

// Organizational Unit Name (eg, secion/division)
csr.CompanyDivision = "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 
csr.SetSubjectField("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.
csr.SetSubjectField("2.5.4.45","1100","UTF8String");

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

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

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

// Create the CSR using the private key.
string pemStr = csr.GenCsrPem(privKey);
if (csr.LastMethodSuccess != true) {
    Debug.WriteLine(csr.LastErrorText);

    return;
}

// Save the private key and CSR to a files.
privKey.SavePkcs8EncryptedPemFile("password","qa_output/privKey1.pem");

Chilkat.FileAccess fac = new Chilkat.FileAccess();
fac.WriteEntireTextFile("qa_output/csr1.pem",pemStr,"utf-8",false);

// Show the CSR.
Debug.WriteLine(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-----