public void AddSubkey(Context ctx, PgpSubkeyOptions options)
{
if (ctx == null)
throw new ArgumentNullException("No context object supplied.");
if (!ctx.IsValid)
throw new InvalidContextException("An invalid context has been supplied.");
if (options == null)
throw new ArgumentNullException("No PgpSubkeyOptions object specified.");
lock (settings.passLock)
{
lock (settings.subkeyLock)
{
settings.subkeyOptions = options;
settings.subkeycapability = AlgorithmCapability.CanNothing;
settings.subkeyalgoquestion = 0;
options.cmdSend = false;
KeyEditOp op = KeyEditOp.AddSubkey;
GpgmeData data = new GpgmeMemoryData();
int err;
try
{
err = StartEdit(ctx, (IntPtr)op, data);
}
catch (Exception ex)
{
throw ex;
}
gpg_err_code_t errcode = libgpgerror.gpg_err_code(err);
switch (errcode)
{
case gpg_err_code_t.GPG_ERR_NO_ERROR:
if (settings.subkeyalgoquestion > 1)
throw new NotSupportedException("GnuPG was not in expert mode. Customized subkeys are not supported.");
break;
case gpg_err_code_t.GPG_ERR_BAD_PASSPHRASE:
throw new BadPassphraseException(settings.passSettings.GetPassphraseInfo());
default:
throw new GpgmeException("An unknown error occurred. Error: "
+ err.ToString(), err);
}
}
}
}
static void Main(string[] args)
{
Context ctx = new Context();
if (ctx.Protocol != Protocol.OpenPGP)
ctx.SetEngineInfo(Protocol.OpenPGP, null, null);
Console.WriteLine("Search Bob's PGP key in the default keyring..");
String searchstr = "*****@*****.**";
IKeyStore keyring = ctx.KeyStore;
// retrieve all keys that have Bob's email address
Key[] keys = keyring.GetKeyList(searchstr, false);
if (keys == null || keys.Length == 0)
{
Console.WriteLine("Cannot find Bob's PGP key {0} in your keyring.", searchstr);
Console.WriteLine("You may want to create the PGP key by using the appropriate\n"
+ "sample in the Samples/ directory.");
return;
}
// print a list of all returned keys
foreach (Key key in keys)
if (key.Uid != null
&& key.Fingerprint != null)
Console.WriteLine("Found key {0} with fingerprint {1}",
key.Uid.Name,
key.Fingerprint);
// we are going to use the first key in the list
PgpKey bob = (PgpKey)keys[0];
if (bob.Uid == null || bob.Fingerprint == null)
throw new InvalidKeyException();
Console.WriteLine("\nUsing key {0}", bob.Fingerprint);
/////// CHANGE PASSPHRASE ///////
Console.WriteLine("Change the secret key's password.");
PgpPassphraseOptions passopts = new PgpPassphraseOptions();
/* We need to specify our own passphrase callback methods
* in case the user does not use gpg-agent.
*/
passopts.OldPassphraseCallback = new PassphraseDelegate(MyPassphraseCallback);
passopts.NewPassphraseCallback = new PassphraseDelegate(MyNewPassphraseCallback);
passopts.EmptyOkay = false; // we do not allow an empty passphrase
bob.ChangePassphrase(ctx, passopts);
/////// ADD SUBKEY ///////
Console.Write("Add a new subkey to Bob's key.. ");
/* Set the password callback - needed if the user doesn't run
* gpg-agent or any other password / pin-entry software.
*/
ctx.SetPassphraseFunction(new PassphraseDelegate(MyPassphraseCallback));
PgpSubkeyOptions subopts = new PgpSubkeyOptions();
subopts.Algorithm = PgpSubkeyAlgorithm.RSAEncryptOnly;
/* Same as:
subopts.SetAlgorithm(KeyAlgorithm.RSA);
subopts.Capability = AlgorithmCapability.CanEncrypt;
*/
subopts.KeyLength = PgpSubkeyOptions.KEY_LENGTH_4096;
subopts.ExpirationDate = DateTime.Now.AddDays(90);
bob.AddSubkey(ctx, subopts);
Console.WriteLine("Done.");
/////// VIEW SUBKEYS ///////
// Reload Bobs key
bob = (PgpKey)keyring.GetKey(bob.Fingerprint, false);
Console.WriteLine("Bob has now the following sub keys:");
int subkeycount = 0;
foreach (Subkey subkey in bob.Subkeys)
{
subkeycount++;
Console.WriteLine("{0}\n\tAlgorithm: {1}\n\t"
+ "Length: {2}\n\t"
+ "Expires: {3}\n",
subkey.Fingerprint,
Gpgme.GetPubkeyAlgoName(subkey.PubkeyAlgorithm),
subkey.Length.ToString(),
subkey.Expires.ToString());
}
Console.WriteLine("Found {0} sub keys.", subkeycount.ToString());
/////// SET OWNER TRUST ///////
Console.WriteLine("Set owner trust of Bob's key.");
Console.Write("\tto never.. ");
bob.SetOwnerTrust(ctx, PgpOwnerTrust.Never);
Console.WriteLine("done.");
Console.Write("\tto ultimate.. ");
bob.SetOwnerTrust(ctx, PgpOwnerTrust.Ultimate);
Console.WriteLine("done.");
/////// ENABLE / DISABLE ///////
Console.Write("Disable Bob's key.. ");
bob.Disable(ctx);
Console.WriteLine("done.");
Console.Write("Enable Bob's key.. ");
bob.Enable(ctx);
Console.WriteLine("done.");
/////// SET EXPIRE DATE ///////
DateTime newdate = DateTime.Now.AddYears(5);
Console.WriteLine("Set new expire date: {0}", newdate);
PgpExpirationOptions expopts = new PgpExpirationOptions();
expopts.ExpirationDate = newdate;
expopts.SelectedSubkeys = null; // only the primary key
bob.SetExpirationDate(ctx, expopts);
return;
}