Node.js

DSA Generate Key

See more DSA Examples

Generates a DSA public/private key pair and saves to PEM and DER file formats (both encrypted and non-encrypted).

An encrypted DSA PEM looks like this:

-----BEGIN DSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,9DAFD5C4CD62A5D0

QwDdp66sB0qKXQli7FbVcKL/eo3wu7kGRlV2sI8XbkNa1RTLiwnwTWDB0dqyWRQ8
...
Bx0HVfxKiNgCbL6BQEnYD+GOmMcckuj9Uhgloe/YuXCIDJBGhjUt/li3hvR/PXeC

V2xxNl1XKBE88njqi+UXt4vjGVNLpvXM
-----END DSA PRIVATE KEY-----

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var dsa = new chilkat.Dsa();

    //  Call GenKey to generate a new DSA key.
    //  The number of bits should be at least 1024 and a multiple
    //  of 64.   Typical values are either 1024 or 2048.
    //  DSA key generation is compute intensive and may take
    //  a short while to complete.
    success = dsa.GenKey(2048);
    if (success !== true) {
        console.log(dsa.LastErrorText);
        return;
    }

    //  Extract the private and public parts to PEM or DER format
    //  and save to files...
    var pemStr;
    var xmlStr;

    //  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,"dsa_pub.pem");

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

    var bPublicOnly = true;
    //  Save to XML
    xmlStr = dsa.ToXml(bPublicOnly);
    success = dsa.SaveText(xmlStr,"dsa_pub.xml");

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

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

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

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

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

    console.log("Finished!");

}

chilkatExample();