(Unicode C++) Generate DSA SSH Key

Generates a DSA SSH key and saves to various public and private key file formats (OpenSSH and PuTTY).

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#include <CkSshKeyW.h>

void ChilkatSample(void)
    {
    CkSshKeyW key;

    bool success;

    int numBits;

    // numBits should be a minimum of 1024 and
    // a multiple of 64.  Typical values are
    // 1024 or 2048. 
    numBits = 2048;
    success = key.GenerateDsaKey(numBits);
    if (success != true) {
        wprintf(L"Invalid numBits passed to DSA key generation method.\n");
        return;
    }

    // Note: Generating a public/private key pair is CPU intensive
    // and may take a short amount of time (more than few seconds,
    // but less than a minute).

    const wchar_t *exportedKey = 0;
    bool exportEncrypted;

    // Export the DSA private key to OpenSSH, PuTTY, and XML and save. 
    exportEncrypted = false;
    exportedKey = key.toOpenSshPrivateKey(exportEncrypted);
    // Chilkat provides a SaveText method for convenience...
    success = key.SaveText(exportedKey,L"privkey_openssh_unencrypted.pem");

    // Export with encryption to OpenSSH private key format:
    key.put_Password(L"secret");
    exportEncrypted = true;
    exportedKey = key.toOpenSshPrivateKey(exportEncrypted);
    success = key.SaveText(exportedKey,L"privkey_openssh_encrypted.pem");

    // Export the DSA private key to unencrypted PuTTY format:
    exportEncrypted = false;
    exportedKey = key.toPuttyPrivateKey(exportEncrypted);
    success = key.SaveText(exportedKey,L"privkey_putty_unencrypted.ppk");

    // Export the DSA private key to encrypted PuTTY format:
    key.put_Password(L"secret");
    exportEncrypted = true;
    exportedKey = key.toPuttyPrivateKey(exportEncrypted);
    success = key.SaveText(exportedKey,L"privkey_putty_encrypted.ppk");

    // Export private key to XML:
    exportedKey = key.toXml();
    success = key.SaveText(exportedKey,L"privkey.xml");

    // ----------------------------------------------------
    // Now for the public key....
    // ----------------------------------------------------

    // The Secure Shell (SSH) Public Key File Format
    // is documented in RFC 4716.
    exportedKey = key.toRfc4716PublicKey();
    success = key.SaveText(exportedKey,L"pubkey_rfc4716.pub");

    // OpenSSH has a separate public-key file format, which 
    // is also supported by Chilkat SshKey:
    exportedKey = key.toOpenSshPublicKey();
    success = key.SaveText(exportedKey,L"pubkey_openSsh.pub");

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