(Unicode C++) Generate new DSA Key from OpenSSL Parameters File

Generates a new DSA key from an OpenSSL-created parameters file (DER and PEM formats supported). Examples of using OpenSSL to create parameter files are shown here:

openssl dsaparam -outform DER 1024 <  seedData.txt >dsaparam.der

openssl dsaparam 1024 < seedData.txt >dsaparam.pem

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#include <CkDsaW.h>

void ChilkatSample(void)
    {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkDsaW dsa;

    bool success = dsa.GenKeyFromParamsDerFile(L"dsaparam.der");
    if (success != true) {
        wprintf(L"%s\n",dsa.lastErrorText());
        return;
    }

    // To generate a key from PEM, call GenKeyFromParamsPem 
    // (for an in-memory PEM string) or GenKeyFromParamsFilePem
    // for a PEM file.

    // The public and private keys may now be exported to PEM, DER,
    // and XML formatted files.

    const wchar_t *pemStr = 0;
    const wchar_t *xmlStr = 0;

    // First for the public key...
    // The public key never needs to be encrypted.

    // Save the public key in PEM format:
    pemStr = dsa.toPublicPem();
    // This example will not check the return value of SaveText...
    success = dsa.SaveText(pemStr,L"dsa_pub.pem");

    // Save the public key in DER format:
    success = dsa.ToPublicDerFile(L"dsa_pub.der");

    bool bPublicOnly = true;
    // Save to XML
    xmlStr = dsa.toXml(bPublicOnly);
    success = dsa.SaveText(pemStr,L"dsa_pub.xml");

    // ------------------------------------
    // Now for the private key....
    // ------------------------------------

    // Unencrypted PEM:
    pemStr = dsa.toPem();
    success = dsa.SaveText(pemStr,L"dsa_priv.pem");

    // Encrypted PEM:
    pemStr = dsa.toEncryptedPem(L"myPassword");
    success = dsa.SaveText(pemStr,L"dsa_privEncrypted.pem");

    // DER:
    success = dsa.ToDerFile(L"dsa_priv.der");

    // XML:
    bPublicOnly = false;
    xmlStr = dsa.toXml(bPublicOnly);
    success = dsa.SaveText(pemStr,L"dsa_priv.xml");

    wprintf(L"Finished!\n");
    }