public void TestGarlicCreate()
{
var ls = new I2PDate(DateTime.Now + TimeSpan.FromMinutes(5));
var origmessage = new DeliveryStatusMessage(I2NPMessage.GenerateMessageId());
var bigmessage = new DataMessage(new BufLen(BufUtils.RandomBytes(14 * 1024)));
var garlic = new Garlic(
new GarlicClove(
new GarlicCloveDeliveryLocal(origmessage),
ls),
new GarlicClove(
new GarlicCloveDeliveryLocal(bigmessage),
ls)
);
var egmsg = Garlic.EGEncryptGarlic(
garlic,
Public,
new I2PSessionKey(),
null);
var origegdata = I2NPMessage.Clone(egmsg);
var origegdata2 = I2NPMessage.Clone(egmsg);
// Decrypt
var(aesblock, sessionkey1) = Garlic.EGDecryptGarlic(origegdata, Private);
var newgarlic = new Garlic((BufRefLen)aesblock.Payload);
var g1 = new BufLen(garlic.ToByteArray());
var g2 = new BufLen(newgarlic.ToByteArray());
Assert.IsTrue(g1 == g2);
// Retrieve
var(aesblock2, sessionkey2) = Garlic.RetrieveAESBlock(origegdata2, Private, null);
newgarlic = new Garlic((BufRefLen)aesblock2.Payload);
g1 = new BufLen(garlic.ToByteArray());
g2 = new BufLen(newgarlic.ToByteArray());
Assert.IsTrue(g1 == g2);
Assert.IsTrue(sessionkey1 == sessionkey2);
}
public void TestEncodeDecodeAES()
{
var m1 = new DeliveryStatusMessage(0x4321);
var m2 = new DeliveryStatusMessage(0xa3c2);
var garlic = new Garlic(
new GarlicClove(
new GarlicCloveDeliveryDestination(
m1,
Destination.IdentHash)),
new GarlicClove(
new GarlicCloveDeliveryDestination(
m2,
Destination.IdentHash))
);
// No tags
var sessionkey = new I2PSessionKey();
var sessiontag = new I2PSessionTag();
var cg = Garlic.AESEncryptGarlic(garlic, sessionkey, sessiontag, null);
var egdata = I2NPMessage.Clone(cg);
var(aesblock, sk) = Garlic.RetrieveAESBlock(egdata, Private, (t) => sessionkey);
var g2 = new Garlic((BufRefLen)aesblock.Payload);
Assert.IsTrue(BufUtils.Equal(garlic.ToByteArray(), g2.ToByteArray()));
// With tags
var tags = new List <I2PSessionTag>();
for (int i = 0; i < 30; ++i)
{
tags.Add(new I2PSessionTag());
}
cg = Garlic.AESEncryptGarlic(garlic, sessionkey, sessiontag, null);
egdata = I2NPMessage.Clone(cg);
(aesblock, sk) = Garlic.RetrieveAESBlock(egdata, Private, (t) => sessionkey);
g2 = new Garlic((BufRefLen)aesblock.Payload);
Assert.IsTrue(BufUtils.Equal(garlic.ToByteArray(), g2.ToByteArray()));
}
public Garlic DecryptMessage(GarlicMessage message)
{
var egdata = message.EGData;
var(aesblock, sessionkey) = Garlic.RetrieveAESBlock(
message,
PrivateKey,
(stag) =>
{
return(SessionTags.TryRemove(stag, out var sessionkeyfound) ? sessionkeyfound : null);
});
if (aesblock is null)
{
Logging.LogDebug($"{Owner} ReceivedSessions: Aes block decrypt failed.");
return(null);
}
#if LOG_ALL_LEASE_MGMT
Logging.LogDebug($"{Owner} ReceivedSessions: Working Aes block received. {SessionTags.Count()} tags available.");
#endif
if (sessionkey != null && aesblock.Tags.Count > 0)
{
#if LOG_ALL_LEASE_MGMT
Logging.LogDebug($"{Owner} ReceivedSessions: {aesblock.Tags.Count} new tags received.");
#endif
foreach (var onetag in aesblock.Tags)
{
SessionTags[new I2PSessionTag(new BufRef(onetag))] =
sessionkey;
}
}
return(new Garlic((BufRefLen)aesblock.Payload));
}
