(Unicode C) Generate a CSR with SAN (Subject Alternative Name) Extension

Demonstrates how to generate a private key and a Certificate Signing Request (CSR) that includes the SAN extension.

Note: This example requires Chilkat v9.5.0.84 or greater.

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#include <C_CkRsaW.h>
#include <C_CkPrivateKeyW.h>
#include <C_CkCsrW.h>
#include <C_CkFileAccessW.h>

void ChilkatSample(void)
    {
    HCkRsaW rsa;
    BOOL success;
    HCkPrivateKeyW privKey;
    HCkCsrW csr;
    const wchar_t *pemStr;
    HCkFileAccessW fac;

    // Note: Requires Chilkat v9.5.0.84 or greater.

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

    // First generate an RSA private key.
    // (It is also possible to create CSRs based on ECDSA private keys..)
    rsa = CkRsaW_Create();

    // Generate a random 2048-bit RSA key.
    success = CkRsaW_GenerateKey(rsa,2048);
    if (success != TRUE) {
        wprintf(L"%s\n",CkRsaW_lastErrorText(rsa));
        CkRsaW_Dispose(rsa);
        return;
    }

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

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

    // Specify the Common Name. 
    CkCsrW_putCommonName(csr,L"mysubdomain.mydomain.com");

    // Country Name (2 letter code)
    CkCsrW_putCountry(csr,L"GB");

    // State or Province Name (full name)
    CkCsrW_putState(csr,L"Yorks");

    // Locality Name (eg, city)
    CkCsrW_putLocality(csr,L"York");

    // Organization Name (eg, company)
    CkCsrW_putCompany(csr,L"Internet Widgits Pty Ltd");

    // Organizational Unit Name (eg, secion/division)
    CkCsrW_putCompanyDivision(csr,L"IT");

    // Email address
    CkCsrW_putEmailAddress(csr,L"support@mydomain.com");

    // Add Subject Alternative Names
    // (The AddSan method is added in Chilkat v9.5.0.84)
    // Call AddSan for each alternative name.
    success = CkCsrW_AddSan(csr,L"dnsName",L"mydomain.com");
    success = CkCsrW_AddSan(csr,L"dnsName",L"mysubdomain.mydomain.com");
    success = CkCsrW_AddSan(csr,L"ipAddress",L"192.168.0.123");

    // Create the CSR using the private key.
    pemStr = CkCsrW_genCsrPem(csr,privKey);
    if (CkCsrW_getLastMethodSuccess(csr) != TRUE) {
        wprintf(L"%s\n",CkCsrW_lastErrorText(csr));
        CkPrivateKeyW_Dispose(privKey);
        CkRsaW_Dispose(rsa);
        CkCsrW_Dispose(csr);
        return;
    }

    // Save the private key and CSR to a files.
    CkPrivateKeyW_SavePkcs8EncryptedPemFile(privKey,L"password",L"qa_output/privKey1.pem");
    CkPrivateKeyW_Dispose(privKey);

    fac = CkFileAccessW_Create();
    CkFileAccessW_WriteEntireTextFile(fac,L"qa_output/csr1.pem",pemStr,L"utf-8",FALSE);

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

    // Sample output:

    // 	-----BEGIN CERTIFICATE REQUEST-----
    // 	MIIC6jCCAdICAQAwgaQxITAfBgNVBAMMGG15c3ViZG9tYWluLm15ZG9tYWluLmNv
    // 	bTELMAkGA1UEBhMCR0IxDjAMBgNVBAgMBVlvcmtzMQ0wCwYDVQQHDARZb3JrMSEw
    // 	HwYDVQQKDBhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxCzAJBgNVBAsMAklUMSMw
    // 	IQYJKoZIhvcNAQkBFhRzdXBwb3J0QG15ZG9tYWluLmNvbTCCASIwDQYJKoZIhvcN
    // 	AQEBBQADggEPADCCAQoCggEBALnQ0un/wF8whk+gPuiAlf3qvx14jgAOV6Erm6EB
    // 	H7WACPCpnKcm/8KP+7uoPiwRQaENhMeCgf45vcivl2p6aAn/spLXyEkXyw2d8wFb
    // 	YYAGRkiz4Xf7ASJiKuwcOtORz+sSDzgtdfokHfXU1cYeFE2yQhSdLUY5fMn425+g
    // 	KoEEsRSjSDe6AKru4+4iGNrLKd8pB9IA5/jOE139IkWlB9r5fEPD5bUTsgqXk9eb
    // 	68O0gc712V2eZK07N24lDmFC4bIMTD4csDWocR5hFHXj7NX7c8sOBDcpEb9mPIk4
    // 	elxubnhkfnjhOi4J3lDHcT/0ALnbLhf9LnaiKqs+5VcVZvECAwEAAaAAMA0GCSqG
    // 	SIb3DQEBBQUAA4IBAQC0AETLIcP3foh5nbu2hVFS8uCUNZ5hEIR1eXmYZmZoBQq2
    // 	26ZAoT4CZwixlggC+n7WvAXJ5Pzxpl4wLV4loTiQzaKPX1w0ERo5ZRwLy0n56oG2
    // 	6QG+WTViT1C8rlgtVwkCFNOXr0kSSRs8FdaPllqKxK1hxYSL7zwNpumsk39F2cDt
    // 	vhcekvH0V3BuGrQFm3dKN/0azW6GOod9+Vq4VzSyOe3kp15oxLBsZOFOu/REujcw
    // 	Tzu2jt1asQKUm60CZ9wNHpYepR0Ww40uP1slbehEaFDa6V8b60/tlHHmBbJ4/fy5
    // 	hJnYCvjzFz4O9VtT+JtP9ldRHWV3KpZ8ne3AjD+F
    // 	-----END CERTIFICATE REQUEST-----


    CkRsaW_Dispose(rsa);
    CkCsrW_Dispose(csr);
    CkFileAccessW_Dispose(fac);

    }