C#

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-----

C#

bool success = false;

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

Chilkat.Dsa 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) {
    Debug.WriteLine(dsa.LastErrorText);
    return;
}

// Extract the private and public parts to PEM or DER format
// and save to files...
string pemStr;
string 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");

bool 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");

Debug.WriteLine("Finished!");