public void TestMultipartEncryptedSignAndEncryptAlgorithm()
{
var body = new TextPart("plain")
{
Text = "This is some cleartext that we'll end up signing and encrypting..."
};
var self = new SecureMailboxAddress("MimeKit UnitTests", "*****@*****.**", "AB0821A2");
DigitalSignatureCollection signatures;
var encrypted = MultipartEncrypted.SignAndEncrypt(self, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, new [] { self }, body);
//using (var file = File.Create ("pgp-signed-encrypted.asc"))
// encrypted.WriteTo (file);
var decrypted = encrypted.Decrypt(out signatures);
Assert.IsInstanceOf <TextPart> (decrypted, "Decrypted part is not the expected type.");
Assert.AreEqual(body.Text, ((TextPart)decrypted).Text, "Decrypted content is not the same as the original.");
Assert.AreEqual(1, signatures.Count, "Verify returned an unexpected number of signatures.");
foreach (var signature in signatures)
{
try {
bool valid = signature.Verify();
Assert.IsTrue(valid, "Bad signature from {0}", signature.SignerCertificate.Email);
} catch (DigitalSignatureVerifyException ex) {
Assert.Fail("Failed to verify signature: {0}", ex);
}
}
}
/*
* Signs and encrypts the given MimeEntity.
*/
MultipartEncrypted SignAndEncryptEntity(Node entityNode, MimeEntity entity)
{
// Retrieving [sign] and [encrypt] nodes.
var signatureNode = entityNode ["sign"];
var encryptionNode = entityNode ["encrypt"];
// Getting signature email as provided by caller.
var signatureAddress = GetSignatureMailboxAddress(signatureNode);
// Retrieving MailboxAddresses to encrypt message for.
var receivers = GetReceiversMailboxAddress(encryptionNode);
/*
* Figuring out signature Digest Algorithm to use for signature, defaulting to SHA256.
* SHA256 should be safe, since there are no known collision weaknesses in it.
* Therefor we default to SHA256, unlesss caller explicitly tells us he wants to use another algorithm.
*/
var algo = signatureNode.GetChildValue("digest-algorithm", _context, DigestAlgorithm.Sha256);
/*
* Creating our Gnu Privacy Guard context, passing in password to retrieve private signing key.
*/
using (var ctx = _context.RaiseEvent(
".p5.crypto.pgp-keys.context.create",
new Node("", false,
new Node [] {
new Node("password", signatureAddress.Item1),
new Node("fingerprint", signatureNode.GetExChildValue <string> ("fingerprint", _context, null) ??
_context.RaiseEvent("p5.auth.pgp.get-fingerprint").Get <string> (_context))
}))
.Get <OpenPgpContext> (_context)) {
// Signing and Encrypting content of email.
var retVal = MultipartEncrypted.SignAndEncrypt(
ctx,
signatureAddress.Item2,
algo,
receivers,
entity);
// Returning encrypted Multipart.
return(retVal);
}
}
/*
* Cryptographically signs and encrypts an entity.
*/
static MultipartEncrypted SignAndEncrypt(
MimeEntity entity,
Node encryptionNode,
string armoredPrivateKey,
string keyPassword)
{
var algo = DigestAlgorithm.Sha256;
using (var ctx = new CreatePgpMimeContext {
Password = keyPassword
})
{
return(MultipartEncrypted.SignAndEncrypt(
ctx,
PgpHelpers.GetSecretKeyFromAsciiArmored(armoredPrivateKey),
algo,
GetEncryptionKeys(encryptionNode),
entity));
}
}
/*
* Signs and encrypts the given MimeEntity.
*/
private MultipartEncrypted SignAndEncryptEntity(
Node entityNode,
MimeEntity entity)
{
// Retrieving [sign] and [encrypt] nodes.
var signatureNode = entityNode ["sign"];
var encryptionNode = entityNode ["encrypt"];
// Getting signature email as provided by caller.
var signatureAddress = GetSignatureMailboxAddress(signatureNode);
// Retrieving MailboxAddresses to encrypt message for.
var receivers = GetReceiversMailboxAddress(encryptionNode);
// Figuring out signature Digest Algorithm to use for signature, defaulting to Sha256.
var algo = signatureNode.GetChildValue("digest-algorithm", _context, DigestAlgorithm.Sha256);
// Creating our Gnu Privacy Guard context.
using (var ctx = new GnuPrivacyContext()) {
// Setting password to retrieve signing certificate from GnuPG context.
ctx.Password = signatureAddress.Item1;
// Signing and Encrypting content of email.
var retVal = MultipartEncrypted.SignAndEncrypt(
ctx,
signatureAddress.Item2,
algo,
receivers,
entity);
// Setting preamble and epilogue AFTER encryption, to give opportunity to give receiver hints.
retVal.Preamble = entityNode.GetChildValue <string> ("preamble", _context, null);
retVal.Epilogue = entityNode.GetChildValue <string> ("epilogue", _context, null);
// Returning encrypted Multipart.
return(retVal);
}
}
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];
DigitalSignatureCollection signatures;
var stream = new MemoryStream();
var entity = new MimePart();
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");
// MultipartEncrypted
// Encrypt
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt((MailboxAddress[])null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.Encrypt(emptyMailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(mailboxes, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt((PgpPublicKey[])null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.Encrypt(emptyPubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(pubkeys, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(null, mailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(ctx, (MailboxAddress[])null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.Encrypt(ctx, emptyMailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(ctx, mailboxes, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(null, pubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(ctx, (PgpPublicKey[])null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.Encrypt(ctx, emptyPubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(ctx, pubkeys, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(EncryptionAlgorithm.Cast5, (MailboxAddress[])null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.Encrypt(EncryptionAlgorithm.Cast5, emptyMailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(EncryptionAlgorithm.Cast5, mailboxes, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(EncryptionAlgorithm.Cast5, (PgpPublicKey[])null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.Encrypt(EncryptionAlgorithm.Cast5, emptyPubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(EncryptionAlgorithm.Cast5, pubkeys, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(null, EncryptionAlgorithm.Cast5, mailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(ctx, EncryptionAlgorithm.Cast5, (MailboxAddress[])null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.Encrypt(ctx, EncryptionAlgorithm.Cast5, emptyMailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(ctx, EncryptionAlgorithm.Cast5, mailboxes, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(null, EncryptionAlgorithm.Cast5, pubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(ctx, EncryptionAlgorithm.Cast5, (PgpPublicKey[])null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.Encrypt(ctx, EncryptionAlgorithm.Cast5, emptyPubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.Encrypt(ctx, EncryptionAlgorithm.Cast5, pubkeys, null));
// SignAndEncrypt
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt((MailboxAddress)null, DigestAlgorithm.Sha1, mailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, emptyMailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, mailboxes, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt((PgpSecretKey)null, DigestAlgorithm.Sha1, pubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(key, DigestAlgorithm.Sha1, null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.SignAndEncrypt(key, DigestAlgorithm.Sha1, emptyPubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(key, DigestAlgorithm.Sha1, pubkeys, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(null, mailboxes[0], DigestAlgorithm.Sha1, mailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(ctx, (MailboxAddress)null, DigestAlgorithm.Sha1, mailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(ctx, mailboxes[0], DigestAlgorithm.Sha1, null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.SignAndEncrypt(ctx, mailboxes[0], DigestAlgorithm.Sha1, emptyMailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(ctx, mailboxes[0], DigestAlgorithm.Sha1, mailboxes, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(null, key, DigestAlgorithm.Sha1, pubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(ctx, (PgpSecretKey)null, DigestAlgorithm.Sha1, pubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(ctx, key, DigestAlgorithm.Sha1, null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.SignAndEncrypt(ctx, key, DigestAlgorithm.Sha1, emptyPubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(ctx, key, DigestAlgorithm.Sha1, pubkeys, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt((MailboxAddress)null, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, mailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, emptyMailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, mailboxes, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt((PgpSecretKey)null, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, pubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.SignAndEncrypt(key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, emptyPubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, pubkeys, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(null, mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, mailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(ctx, (MailboxAddress)null, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, mailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(ctx, mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.SignAndEncrypt(ctx, mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, emptyMailboxes, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(ctx, mailboxes[0], DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, mailboxes, null));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(null, key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, pubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(ctx, (PgpSecretKey)null, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, pubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(ctx, key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, null, entity));
Assert.Throws <ArgumentException> (() => MultipartEncrypted.SignAndEncrypt(ctx, key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, emptyPubkeys, entity));
Assert.Throws <ArgumentNullException> (() => MultipartEncrypted.SignAndEncrypt(ctx, key, DigestAlgorithm.Sha1, EncryptionAlgorithm.Cast5, pubkeys, null));
var encrypted = new MultipartEncrypted();
Assert.Throws <ArgumentNullException> (() => encrypted.Accept(null));
Assert.Throws <ArgumentNullException> (() => encrypted.Decrypt(null));
Assert.Throws <ArgumentNullException> (() => encrypted.Decrypt(null, out signatures));
}
}