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@ -99,6 +99,56 @@ namespace garlic
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m_ExpirationTimestamp = i2p::util::GetSecondsSinceEpoch () + ECIESX25519_PREVIOUS_TAGSET_EXPIRATION_TIMEOUT;
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}
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bool RatchetTagSet::HandleNextMessage (uint8_t * buf, size_t len, int index)
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{
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auto session = GetSession ();
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if (!session) return false;
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return session->HandleNextMessage (buf, len, shared_from_this (), index);
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}
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DatabaseLookupTagSet::DatabaseLookupTagSet (GarlicDestination * destination, const uint8_t * key):
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RatchetTagSet (nullptr), m_Destination (destination)
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{
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memcpy (m_Key, key, 32);
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Expire ();
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}
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bool DatabaseLookupTagSet::HandleNextMessage (uint8_t * buf, size_t len, int index)
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{
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if (len < 24) return false;
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uint8_t nonce[12];
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memset (nonce, 0, 12); // n = 0
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size_t offset = 8; // first 8 bytes is reply tag used as AD
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len -= 16; // poly1305
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if (!i2p::crypto::AEADChaCha20Poly1305 (buf + offset, len - offset, buf, 8, m_Key, nonce, buf + offset, len - offset, false)) // decrypt
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{
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LogPrint (eLogWarning, "Garlic: Lookup reply AEAD decryption failed");
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return false;
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}
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// we assume 1 I2NP block with delivery type local
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if (offset + 3 > len)
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{
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LogPrint (eLogWarning, "Garlic: Lookup reply is too short ", len);
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return false;
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}
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if (buf[offset] != eECIESx25519BlkGalicClove)
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{
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LogPrint (eLogWarning, "Garlic: Lookup reply unexpected block ", (int)buf[offset]);
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return false;
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}
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offset++;
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auto size = bufbe16toh (buf + offset);
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offset += 2;
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if (offset + size > len)
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{
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LogPrint (eLogWarning, "Garlic: Lookup reply block is too long ", size);
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return false;
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}
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if (m_Destination)
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m_Destination->HandleECIESx25519GarlicClove (buf + offset, size);
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return true;
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}
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ECIESX25519AEADRatchetSession::ECIESX25519AEADRatchetSession (GarlicDestination * owner, bool attachLeaseSet):
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GarlicRoutingSession (owner, attachLeaseSet)
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{
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