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trim behind not affter max generated tags

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orignal 2020-12-20 19:52:06 -05:00
parent da7e2f2580
commit f2e4d5f06c
1 changed files with 8 additions and 6 deletions
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14
libi2pd/ECIESX25519AEADRatchetSession.cpp
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@ -298,7 +298,10 @@ namespace garlic
break;
case eECIESx25519BlkNextKey:
LogPrint (eLogDebug, "Garlic: next key");
HandleNextKey (buf + offset, size, receiveTagset);
if (receiveTagset)
HandleNextKey (buf + offset, size, receiveTagset);
else
LogPrint (eLogError, "Garlic: Unexpected next key block");
break;
case eECIESx25519BlkAck:
{
@ -721,20 +724,19 @@ namespace garlic
{
if (receiveTagset->GetNextIndex () - index < GetOwner ()->GetNumRatchetInboundTags ()/2)
moreTags = GetOwner ()->GetNumRatchetInboundTags ();
index -= GetOwner ()->GetNumRatchetInboundTags (); // trim behind
}
else
{
moreTags = ECIESX25519_MIN_NUM_GENERATED_TAGS + (index >> 2); // N/4
if (moreTags > ECIESX25519_MAX_NUM_GENERATED_TAGS) moreTags = ECIESX25519_MAX_NUM_GENERATED_TAGS;
moreTags -= (receiveTagset->GetNextIndex () - index);
index -= ECIESX25519_MAX_NUM_GENERATED_TAGS; // trim behind
}
if (moreTags > 0)
{
GenerateMoreReceiveTags (receiveTagset, moreTags);
index -= (moreTags >> 1); // /2
if (index > 0)
receiveTagset->SetTrimBehind (index);
}
if (index > 0)
receiveTagset->SetTrimBehind (index);
}
return true;
}