C#

Generate DSA SSH Key

See more SSH Key Examples

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

bool success = false;

Chilkat.SshKey key = new Chilkat.SshKey();

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) {
    Debug.WriteLine("Invalid numBits passed to DSA key generation method.");
    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).

string exportedKey;
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,"privkey_openssh_unencrypted.pem");

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

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

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

//  Export private key to XML:
exportedKey = key.ToXml();
success = key.SaveText(exportedKey,"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,"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,"pubkey_openSsh.pub");

Debug.WriteLine("Finished.");