/// <summary>
/// A simple routine that opens a key ring file and loads the first available key suitable for encryption.
/// </summary>
/// <param name="publicKey">The public key.</param>
/// <returns>The public key data.</returns>
private Key.Bcpg.OpenPgp.PgpPublicKey ReadPublicKey(System.IO.Stream publicKey)
{
Key.Bcpg.OpenPgp.PgpPublicKeyRingBundle pgpPub = new Key.Bcpg.OpenPgp.PgpPublicKeyRingBundle(
Key.Bcpg.OpenPgp.PgpUtilities.GetDecoderStream(publicKey));
// Loop through the collection till we find a key suitable for encryption
foreach (Key.Bcpg.OpenPgp.PgpPublicKeyRing keyRing in pgpPub.GetKeyRings())
{
foreach (Key.Bcpg.OpenPgp.PgpPublicKey key in keyRing.GetPublicKeys())
{
if (key.IsEncryptionKey)
{
// Return the key.
return(key);
}
}
}
// If no key data has been found.
throw new ArgumentException("Can't find encryption key in key ring.");
}
