Method ReadStandardLS2TypeSpecificPart

libi2pd/LeaseSet.cpp:399–481

	}

	size_t LeaseSet2::ReadStandardLS2TypeSpecificPart (const uint8_t * buf, size_t len,
		std::shared_ptr<LocalDestination> dest)
	{
		size_t offset = 0;
		// properties
		if (offset + 2 > len) return 0;
		m_Properties.CleanUp ();
		uint16_t propertiesLen = bufbe16toh (buf + offset);
		if (propertiesLen)
			m_Properties.FromBuffer (buf + offset, len - offset);
		offset += propertiesLen + 2;
		// key sections
		CryptoKeyType preferredKeyType = m_EncryptionType;
		m_EncryptionType = 0;
		bool preferredKeyFound = false;
		if (offset + 1 > len) return 0;
		int numKeySections = buf[offset]; offset++;
		for (int i = 0; i < numKeySections; i++)
		{
			if (offset + 4 > len) return 0;
			uint16_t keyType = bufbe16toh (buf + offset); offset += 2; // encryption key type
			uint16_t encryptionKeyLen = bufbe16toh (buf + offset); offset += 2;
			if (offset + encryptionKeyLen > len) return 0;
			if (IsStoreLeases () && !preferredKeyFound) // create encryptor with leases only
			{
				// we pick max key type if preferred not found
#if !OPENSSL_PQ
				if (keyType <= i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD) // skip PQ keys if not supported
#endif
				{
					if ((keyType == preferredKeyType || !m_Encryptor || keyType > m_EncryptionType) &&
					    (!dest || dest->SupportsEncryptionType (keyType)))
					{
						auto encryptor = i2p::data::IdentityEx::CreateEncryptor (keyType, buf + offset);
						if (encryptor)
						{
							m_Encryptor = encryptor; // TODO: atomic
							m_EncryptionType = keyType;
							if (keyType == preferredKeyType) preferredKeyFound = true;
						}
					}
				}
			}
			offset += encryptionKeyLen;
		}
		// leases
		if (offset + 1 > len) return 0;
		int numLeases = buf[offset]; offset++;
		auto ts = i2p::util::GetMillisecondsSinceEpoch ();
		if (GetExpirationTime () > ts + LEASESET_EXPIRATION_TIME_THRESHOLD)
		{
			LogPrint (eLogWarning, "LeaseSet2: Expiration time is from future ", GetExpirationTime ()/1000LL);
			return 0;
		}
		if (ts > m_PublishedTimestamp*1000LL + LEASESET_EXPIRATION_TIME_THRESHOLD)
		{
			LogPrint (eLogWarning, "LeaseSet2: Published time is too old ", m_PublishedTimestamp);
			return 0;