Esempio n. 1
0
        public void TestExport()
        {
            var self = new MailboxAddress("MimeKit UnitTests", "*****@*****.**");

            using (var ctx = new DummyOpenPgpContext()) {
                Assert.AreEqual("application/pgp-keys", ctx.KeyExchangeProtocol, "The key-exchange protocol does not match.");

                var exported = ctx.Export(new [] { self });

                Assert.IsNotNull(exported, "The exported MIME part should not be null.");
                Assert.IsInstanceOf <MimePart> (exported, "The exported MIME part should be a MimePart.");
                Assert.AreEqual("application/pgp-keys", exported.ContentType.MimeType);
            }
        }
Esempio n. 2
0
        public void TestArgumentExceptions()
        {
            Assert.Throws <ArgumentNullException> (() => CryptographyContext.Create(null));
            Assert.Throws <ArgumentNullException> (() => CryptographyContext.Register((Type)null));
            Assert.Throws <ArgumentNullException> (() => CryptographyContext.Register((Func <OpenPgpContext>)null));
            Assert.Throws <ArgumentNullException> (() => CryptographyContext.Register((Func <SecureMimeContext>)null));

            using (var ctx = new DummyOpenPgpContext()) {
                var mailboxes      = new [] { new MailboxAddress("MimeKit UnitTests", "*****@*****.**") };
                var emptyMailboxes = new MailboxAddress[0];
                var pubkeys        = ctx.GetPublicKeys(mailboxes);
                var key            = ctx.GetSigningKey(mailboxes[0]);
                var emptyPubkeys   = new PgpPublicKey[0];
                var stream         = new MemoryStream();

                Assert.Throws <ArgumentException> (() => ctx.KeyServer = new Uri("relative/uri", UriKind.Relative));

                Assert.Throws <ArgumentNullException> (() => ctx.GetDigestAlgorithm(null));
                Assert.Throws <ArgumentOutOfRangeException> (() => ctx.GetDigestAlgorithmName(DigestAlgorithm.DoubleSha));
                Assert.Throws <NotSupportedException> (() => OpenPgpContext.GetHashAlgorithm(DigestAlgorithm.DoubleSha));
                Assert.Throws <NotSupportedException> (() => OpenPgpContext.GetHashAlgorithm(DigestAlgorithm.Tiger192));
                Assert.Throws <NotSupportedException> (() => OpenPgpContext.GetHashAlgorithm(DigestAlgorithm.Haval5160));
                Assert.Throws <NotSupportedException> (() => OpenPgpContext.GetHashAlgorithm(DigestAlgorithm.MD4));
                Assert.Throws <ArgumentOutOfRangeException> (() => OpenPgpContext.GetDigestAlgorithm((Org.BouncyCastle.Bcpg.HashAlgorithmTag) 1024));

                Assert.Throws <ArgumentNullException> (() => new ApplicationPgpEncrypted((MimeEntityConstructorArgs)null));
                Assert.Throws <ArgumentNullException> (() => new ApplicationPgpSignature((MimeEntityConstructorArgs)null));
                Assert.Throws <ArgumentNullException> (() => new ApplicationPgpSignature((Stream)null));

                // Accept
                Assert.Throws <ArgumentNullException> (() => new ApplicationPgpEncrypted().Accept(null));
                Assert.Throws <ArgumentNullException> (() => new ApplicationPgpSignature(stream).Accept(null));

                // Decrypt
                Assert.Throws <ArgumentNullException> (() => ctx.Decrypt(null), "Decrypt");

                // Encrypt
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt(EncryptionAlgorithm.Cast5, (MailboxAddress[])null, stream), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt(EncryptionAlgorithm.Cast5, (PgpPublicKey[])null, stream), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt((MailboxAddress[])null, stream), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt((PgpPublicKey[])null, stream), "Encrypt");
                Assert.Throws <ArgumentException> (() => ctx.Encrypt(EncryptionAlgorithm.Cast5, emptyMailboxes, stream), "Encrypt");
                Assert.Throws <ArgumentException> (() => ctx.Encrypt(EncryptionAlgorithm.Cast5, emptyPubkeys, stream), "Encrypt");
                Assert.Throws <ArgumentException> (() => ctx.Encrypt(emptyMailboxes, stream), "Encrypt");
                Assert.Throws <ArgumentException> (() => ctx.Encrypt(emptyPubkeys, stream), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt(EncryptionAlgorithm.Cast5, mailboxes, null), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt(EncryptionAlgorithm.Cast5, pubkeys, null), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt(mailboxes, null), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt(pubkeys, null), "Encrypt");

                // Export
                Assert.Throws <ArgumentNullException> (() => ctx.Export((PgpPublicKeyRingBundle)null), "Export");
                Assert.Throws <ArgumentNullException> (() => ctx.Export((MailboxAddress[])null), "Export");
                Assert.Throws <ArgumentNullException> (() => ctx.Export((PgpPublicKey[])null), "Export");

                // GetDecryptedStream
                Assert.Throws <ArgumentNullException> (() => ctx.GetDecryptedStream(null), "GetDecryptedStream");

                // GetDigestAlgorithmName
                Assert.Throws <ArgumentOutOfRangeException> (() => ctx.GetDigestAlgorithmName(DigestAlgorithm.None), "GetDigestAlgorithmName");

                // Import
                Assert.Throws <ArgumentNullException> (() => ctx.Import((Stream)null), "Import");
                Assert.Throws <ArgumentNullException> (() => ctx.Import((PgpPublicKeyRing)null), "Import");
                Assert.Throws <ArgumentNullException> (() => ctx.Import((PgpPublicKeyRingBundle)null), "Import");
                Assert.Throws <ArgumentNullException> (() => ctx.Import((PgpSecretKeyRing)null), "Import");
                Assert.Throws <ArgumentNullException> (() => ctx.Import((PgpSecretKeyRingBundle)null), "Import");

                // ImportSecretKeys
                Assert.Throws <ArgumentNullException> (() => ctx.ImportSecretKeys(null), "ImportSecretKeys");

                // Sign
                Assert.Throws <ArgumentNullException> (() => ctx.Sign((MailboxAddress)null, DigestAlgorithm.Sha1, stream), "Sign");
                Assert.Throws <ArgumentNullException> (() => ctx.Sign((PgpSecretKey)null, DigestAlgorithm.Sha1, stream), "Sign");
                Assert.Throws <ArgumentNullException> (() => ctx.Sign(mailboxes[0], DigestAlgorithm.Sha1, null), "Sign");
                Assert.Throws <ArgumentNullException> (() => ctx.Sign(key, DigestAlgorithm.Sha1, null), "Sign");

                // SignAndEncrypt
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt((MailboxAddress)null, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, mailboxes, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt((PgpSecretKey)null, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, pubkeys, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, (MailboxAddress[])null, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, (PgpPublicKey[])null, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentException> (() => ctx.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, emptyMailboxes, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentException> (() => ctx.SignAndEncrypt(key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, emptyPubkeys, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, mailboxes, null), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, pubkeys, null), "SignAndEncrypt");

                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt((MailboxAddress)null, DigestAlgorithm.Sha1, mailboxes, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt((PgpSecretKey)null, DigestAlgorithm.Sha1, pubkeys, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, (MailboxAddress[])null, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(key, DigestAlgorithm.Sha1, (PgpPublicKey[])null, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentException> (() => ctx.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, emptyMailboxes, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentException> (() => ctx.SignAndEncrypt(key, DigestAlgorithm.Sha1, emptyPubkeys, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, mailboxes, null), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(key, DigestAlgorithm.Sha1, pubkeys, null), "SignAndEncrypt");

                // Supports
                Assert.Throws <ArgumentNullException> (() => ctx.Supports(null), "Supports");

                // Verify
                Assert.Throws <ArgumentNullException> (() => ctx.Verify(null, stream), "Verify");
                Assert.Throws <ArgumentNullException> (() => ctx.Verify(stream, null), "Verify");
            }
        }
Esempio n. 3
0
		public void TestExport ()
		{
			var self = new MailboxAddress ("MimeKit UnitTests", "*****@*****.**");

			using (var ctx = new DummyOpenPgpContext ()) {
				Assert.AreEqual ("application/pgp-keys", ctx.KeyExchangeProtocol, "The key-exchange protocol does not match.");

				var exported = ctx.Export (new [] { self });

				Assert.IsNotNull (exported, "The exported MIME part should not be null.");
				Assert.IsInstanceOf<MimePart> (exported, "The exported MIME part should be a MimePart.");
				Assert.AreEqual ("application/pgp-keys", exported.ContentType.MimeType);
			}
		}
Esempio n. 4
0
		public void TestArgumentExceptions ()
		{
			using (var ctx = new DummyOpenPgpContext ()) {
				var mailboxes = new [] { new MailboxAddress ("MimeKit UnitTests", "*****@*****.**") };
				var emptyMailboxes = new MailboxAddress[0];
				var pubkeys = ctx.GetPublicKeys (mailboxes);
				var key = ctx.GetSigningKey (mailboxes[0]);
				var emptyPubkeys = new PgpPublicKey[0];
				var stream = new MemoryStream ();

				Assert.Throws<ArgumentNullException> (() => new ApplicationPgpEncrypted ((MimeEntityConstructorArgs) null));
				Assert.Throws<ArgumentNullException> (() => new ApplicationPgpSignature ((MimeEntityConstructorArgs) null));
				Assert.Throws<ArgumentNullException> (() => new ApplicationPgpSignature ((Stream) null));

				// Accept
				Assert.Throws<ArgumentNullException> (() => new ApplicationPgpEncrypted ().Accept (null));
				Assert.Throws<ArgumentNullException> (() => new ApplicationPgpSignature (stream).Accept (null));

				// Decrypt
				Assert.Throws<ArgumentNullException> (() => ctx.Decrypt (null), "Decrypt");

				// Encrypt
				Assert.Throws<ArgumentNullException> (() => ctx.Encrypt (EncryptionAlgorithm.Cast5, (MailboxAddress[]) null, stream), "Encrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.Encrypt (EncryptionAlgorithm.Cast5, (PgpPublicKey[]) null, stream), "Encrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.Encrypt ((MailboxAddress[]) null, stream), "Encrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.Encrypt ((PgpPublicKey[]) null, stream), "Encrypt");
				Assert.Throws<ArgumentException> (() => ctx.Encrypt (EncryptionAlgorithm.Cast5, emptyMailboxes, stream), "Encrypt");
				Assert.Throws<ArgumentException> (() => ctx.Encrypt (EncryptionAlgorithm.Cast5, emptyPubkeys, stream), "Encrypt");
				Assert.Throws<ArgumentException> (() => ctx.Encrypt (emptyMailboxes, stream), "Encrypt");
				Assert.Throws<ArgumentException> (() => ctx.Encrypt (emptyPubkeys, stream), "Encrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.Encrypt (EncryptionAlgorithm.Cast5, mailboxes, null), "Encrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.Encrypt (EncryptionAlgorithm.Cast5, pubkeys, null), "Encrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.Encrypt (mailboxes, null), "Encrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.Encrypt (pubkeys, null), "Encrypt");

				// Export
				Assert.Throws<ArgumentNullException> (() => ctx.Export ((PgpPublicKeyRingBundle) null), "Export");
				Assert.Throws<ArgumentNullException> (() => ctx.Export ((MailboxAddress[]) null), "Export");
				Assert.Throws<ArgumentNullException> (() => ctx.Export ((PgpPublicKey[]) null), "Export");

				// GetDecryptedStream
				Assert.Throws<ArgumentNullException> (() => ctx.GetDecryptedStream (null), "GetDecryptedStream");

				// GetDigestAlgorithmName
				Assert.Throws<ArgumentOutOfRangeException> (() => ctx.GetDigestAlgorithmName (DigestAlgorithm.None), "GetDigestAlgorithmName");

				// Import
				Assert.Throws<ArgumentNullException> (() => ctx.Import ((Stream) null), "Import");
				Assert.Throws<ArgumentNullException> (() => ctx.Import ((PgpPublicKeyRing) null), "Import");
				Assert.Throws<ArgumentNullException> (() => ctx.Import ((PgpPublicKeyRingBundle) null), "Import");
				Assert.Throws<ArgumentNullException> (() => ctx.Import ((PgpSecretKeyRing) null), "Import");
				Assert.Throws<ArgumentNullException> (() => ctx.Import ((PgpSecretKeyRingBundle) null), "Import");

				// ImportSecretKeys
				Assert.Throws<ArgumentNullException> (() => ctx.ImportSecretKeys (null), "ImportSecretKeys");

				// Sign
				Assert.Throws<ArgumentNullException> (() => ctx.Sign ((MailboxAddress) null, DigestAlgorithm.Sha1, stream), "Sign");
				Assert.Throws<ArgumentNullException> (() => ctx.Sign ((PgpSecretKey) null, DigestAlgorithm.Sha1, stream), "Sign");
				Assert.Throws<ArgumentNullException> (() => ctx.Sign (mailboxes[0], DigestAlgorithm.Sha1, null), "Sign");
				Assert.Throws<ArgumentNullException> (() => ctx.Sign (key, DigestAlgorithm.Sha1, null), "Sign");

				// SignAndEncrypt
				Assert.Throws<ArgumentNullException> (() => ctx.SignAndEncrypt ((MailboxAddress) null, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, mailboxes, stream), "SignAndEncrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.SignAndEncrypt ((PgpSecretKey) null, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, pubkeys, stream), "SignAndEncrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.SignAndEncrypt (mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, (MailboxAddress[]) null, stream), "SignAndEncrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.SignAndEncrypt (key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, (PgpPublicKey[]) null, stream), "SignAndEncrypt");
				Assert.Throws<ArgumentException> (() => ctx.SignAndEncrypt (mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, emptyMailboxes, stream), "SignAndEncrypt");
				Assert.Throws<ArgumentException> (() => ctx.SignAndEncrypt (key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, emptyPubkeys, stream), "SignAndEncrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.SignAndEncrypt (mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, mailboxes, null), "SignAndEncrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.SignAndEncrypt (key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, pubkeys, null), "SignAndEncrypt");

				Assert.Throws<ArgumentNullException> (() => ctx.SignAndEncrypt ((MailboxAddress) null, DigestAlgorithm.Sha1, mailboxes, stream), "SignAndEncrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.SignAndEncrypt ((PgpSecretKey) null, DigestAlgorithm.Sha1, pubkeys, stream), "SignAndEncrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.SignAndEncrypt (mailboxes[0], DigestAlgorithm.Sha1, (MailboxAddress[]) null, stream), "SignAndEncrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.SignAndEncrypt (key, DigestAlgorithm.Sha1, (PgpPublicKey[]) null, stream), "SignAndEncrypt");
				Assert.Throws<ArgumentException> (() => ctx.SignAndEncrypt (mailboxes[0], DigestAlgorithm.Sha1, emptyMailboxes, stream), "SignAndEncrypt");
				Assert.Throws<ArgumentException> (() => ctx.SignAndEncrypt (key, DigestAlgorithm.Sha1, emptyPubkeys, stream), "SignAndEncrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.SignAndEncrypt (mailboxes[0], DigestAlgorithm.Sha1, mailboxes, null), "SignAndEncrypt");
				Assert.Throws<ArgumentNullException> (() => ctx.SignAndEncrypt (key, DigestAlgorithm.Sha1, pubkeys, null), "SignAndEncrypt");

				// Supports
				Assert.Throws<ArgumentNullException> (() => ctx.Supports (null), "Supports");

				// Verify
				Assert.Throws<ArgumentNullException> (() => ctx.Verify (null, stream), "Verify");
				Assert.Throws<ArgumentNullException> (() => ctx.Verify (stream, null), "Verify");
			}
		}
Esempio n. 5
0
        public void TestArgumentExceptions()
        {
            using (var ctx = new DummyOpenPgpContext()) {
                var mailboxes      = new [] { new MailboxAddress("MimeKit UnitTests", "*****@*****.**") };
                var emptyMailboxes = new MailboxAddress[0];
                var pubkeys        = ctx.GetPublicKeys(mailboxes);
                var key            = ctx.GetSigningKey(mailboxes[0]);
                var emptyPubkeys   = new PgpPublicKey[0];
                var stream         = new MemoryStream();

                Assert.Throws <ArgumentNullException> (() => new ApplicationPgpEncrypted((MimeEntityConstructorArgs)null));
                Assert.Throws <ArgumentNullException> (() => new ApplicationPgpSignature((MimeEntityConstructorArgs)null));
                Assert.Throws <ArgumentNullException> (() => new ApplicationPgpSignature((Stream)null));

                // Accept
                Assert.Throws <ArgumentNullException> (() => new ApplicationPgpEncrypted().Accept(null));
                Assert.Throws <ArgumentNullException> (() => new ApplicationPgpSignature(stream).Accept(null));

                // Decrypt
                Assert.Throws <ArgumentNullException> (() => ctx.Decrypt(null), "Decrypt");

                // Encrypt
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt(EncryptionAlgorithm.Cast5, (MailboxAddress[])null, stream), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt(EncryptionAlgorithm.Cast5, (PgpPublicKey[])null, stream), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt((MailboxAddress[])null, stream), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt((PgpPublicKey[])null, stream), "Encrypt");
                Assert.Throws <ArgumentException> (() => ctx.Encrypt(EncryptionAlgorithm.Cast5, emptyMailboxes, stream), "Encrypt");
                Assert.Throws <ArgumentException> (() => ctx.Encrypt(EncryptionAlgorithm.Cast5, emptyPubkeys, stream), "Encrypt");
                Assert.Throws <ArgumentException> (() => ctx.Encrypt(emptyMailboxes, stream), "Encrypt");
                Assert.Throws <ArgumentException> (() => ctx.Encrypt(emptyPubkeys, stream), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt(EncryptionAlgorithm.Cast5, mailboxes, null), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt(EncryptionAlgorithm.Cast5, pubkeys, null), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt(mailboxes, null), "Encrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.Encrypt(pubkeys, null), "Encrypt");

                // Export
                Assert.Throws <ArgumentNullException> (() => ctx.Export((PgpPublicKeyRingBundle)null), "Export");
                Assert.Throws <ArgumentNullException> (() => ctx.Export((MailboxAddress[])null), "Export");
                Assert.Throws <ArgumentNullException> (() => ctx.Export((PgpPublicKey[])null), "Export");

                // GetDecryptedStream
                Assert.Throws <ArgumentNullException> (() => ctx.GetDecryptedStream(null), "GetDecryptedStream");

                // GetDigestAlgorithmName
                Assert.Throws <ArgumentOutOfRangeException> (() => ctx.GetDigestAlgorithmName(DigestAlgorithm.None), "GetDigestAlgorithmName");

                // Import
                Assert.Throws <ArgumentNullException> (() => ctx.Import((Stream)null), "Import");
                Assert.Throws <ArgumentNullException> (() => ctx.Import((PgpPublicKeyRing)null), "Import");
                Assert.Throws <ArgumentNullException> (() => ctx.Import((PgpPublicKeyRingBundle)null), "Import");
                Assert.Throws <ArgumentNullException> (() => ctx.Import((PgpSecretKeyRing)null), "Import");
                Assert.Throws <ArgumentNullException> (() => ctx.Import((PgpSecretKeyRingBundle)null), "Import");

                // ImportSecretKeys
                Assert.Throws <ArgumentNullException> (() => ctx.ImportSecretKeys(null), "ImportSecretKeys");

                // Sign
                Assert.Throws <ArgumentNullException> (() => ctx.Sign((MailboxAddress)null, DigestAlgorithm.Sha1, stream), "Sign");
                Assert.Throws <ArgumentNullException> (() => ctx.Sign((PgpSecretKey)null, DigestAlgorithm.Sha1, stream), "Sign");
                Assert.Throws <ArgumentNullException> (() => ctx.Sign(mailboxes[0], DigestAlgorithm.Sha1, null), "Sign");
                Assert.Throws <ArgumentNullException> (() => ctx.Sign(key, DigestAlgorithm.Sha1, null), "Sign");

                // SignAndEncrypt
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt((MailboxAddress)null, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, mailboxes, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt((PgpSecretKey)null, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, pubkeys, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, (MailboxAddress[])null, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, (PgpPublicKey[])null, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentException> (() => ctx.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, emptyMailboxes, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentException> (() => ctx.SignAndEncrypt(key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, emptyPubkeys, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, mailboxes, null), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, pubkeys, null), "SignAndEncrypt");

                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt((MailboxAddress)null, DigestAlgorithm.Sha1, mailboxes, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt((PgpSecretKey)null, DigestAlgorithm.Sha1, pubkeys, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, (MailboxAddress[])null, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(key, DigestAlgorithm.Sha1, (PgpPublicKey[])null, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentException> (() => ctx.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, emptyMailboxes, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentException> (() => ctx.SignAndEncrypt(key, DigestAlgorithm.Sha1, emptyPubkeys, stream), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, mailboxes, null), "SignAndEncrypt");
                Assert.Throws <ArgumentNullException> (() => ctx.SignAndEncrypt(key, DigestAlgorithm.Sha1, pubkeys, null), "SignAndEncrypt");

                // Supports
                Assert.Throws <ArgumentNullException> (() => ctx.Supports(null), "Supports");

                // Verify
                Assert.Throws <ArgumentNullException> (() => ctx.Verify(null, stream), "Verify");
                Assert.Throws <ArgumentNullException> (() => ctx.Verify(stream, null), "Verify");
            }
        }