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RouterInfo added
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259
RouterInfo.cpp
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259
RouterInfo.cpp
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#include <stdio.h>
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#include <string.h>
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#include <endian.h>
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#include <fstream>
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#include <boost/lexical_cast.hpp>
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#include <cryptopp/sha.h>
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#include <cryptopp/dsa.h>
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#include "CryptoConst.h"
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#include "base64.h"
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#include "Timestamp.h"
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#include "Log.h"
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#include "RouterInfo.h"
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#include "RouterContext.h"
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namespace i2p
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{
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namespace data
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{
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RouterInfo::RouterInfo (const char * filename)
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{
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ReadFromFile (filename);
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}
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RouterInfo::RouterInfo (const uint8_t * buf, int len)
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{
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memcpy (m_Buffer, buf, len);
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m_BufferLen = len;
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ReadFromBuffer ();
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}
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void RouterInfo::SetRouterIdentity (const RouterIdentity& identity)
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{
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m_RouterIdentity = identity;
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CryptoPP::SHA256().CalculateDigest(m_IdentHash, (uint8_t *)&m_RouterIdentity, sizeof (m_RouterIdentity));
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m_Timestamp = i2p::util::GetMillisecondsSinceEpoch ();
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}
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void RouterInfo::ReadFromFile (const char * filename)
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{
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std::ifstream s(filename);
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if (s.is_open ())
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{
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s.seekg (0,std::ios::end);
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m_BufferLen = s.tellg ();
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s.seekg(0, std::ios::beg);
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s.read(m_Buffer,m_BufferLen);
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ReadFromBuffer ();
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}
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else
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LogPrint ("Can't open file ", filename);
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}
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void RouterInfo::ReadFromBuffer ()
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{
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std::stringstream str (std::string (m_Buffer, m_BufferLen));
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ReadFromStream (str);
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// verify signature
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CryptoPP::DSA::PublicKey pubKey;
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pubKey.Initialize (i2p::crypto::dsap, i2p::crypto::dsaq, i2p::crypto::dsag, CryptoPP::Integer (m_RouterIdentity.signingKey, 128));
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CryptoPP::DSA::Verifier verifier (pubKey);
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int l = m_BufferLen - 40;
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if (!verifier.VerifyMessage ((uint8_t *)m_Buffer, l, (uint8_t *)m_Buffer + l, 40))
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{
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LogPrint ("signature verification failed");
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}
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}
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void RouterInfo::ReadFromStream (std::istream& s)
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{
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s.read ((char *)&m_RouterIdentity, sizeof (m_RouterIdentity));
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s.read ((char *)&m_Timestamp, sizeof (m_Timestamp));
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m_Timestamp = be64toh (m_Timestamp);
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// read addresses
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uint8_t numAddresses;
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s.read ((char *)&numAddresses, sizeof (numAddresses));
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for (int i = 0; i < numAddresses; i++)
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{
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Address address;
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s.read ((char *)&address.cost, sizeof (address.cost));
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s.read ((char *)&address.date, sizeof (address.date));
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char transportStyle[5];
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ReadString (transportStyle, s);
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if (!strcmp (transportStyle, "NTCP"))
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address.transportStyle = eTransportNTCP;
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else if (!strcmp (transportStyle, "SSU"))
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address.transportStyle = eTransportSSU;
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else
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address.transportStyle = eTransportUnknown;
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uint16_t size, r = 0;
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s.read ((char *)&size, sizeof (size));
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size = be16toh (size);
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while (r < size)
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{
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char key[50], value[50];
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r += ReadString (key, s);
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s.seekg (1, std::ios_base::cur); r++; // =
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r += ReadString (value, s);
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s.seekg (1, std::ios_base::cur); r++; // ;
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if (!strcmp (key, "host"))
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address.host = value;
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else if (!strcmp (key, "port"))
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address.port = boost::lexical_cast<int>(value);
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}
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m_Addresses.push_back(address);
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}
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// read peers
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uint8_t numPeers;
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s.read ((char *)&numPeers, sizeof (numPeers));
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s.seekg (numPeers*32, std::ios_base::cur); // TODO: read peers
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// read properties
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uint16_t size, r = 0;
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s.read ((char *)&size, sizeof (size));
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size = be16toh (size);
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while (r < size)
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{
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char key[50], value[50];
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r += ReadString (key, s);
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s.seekg (1, std::ios_base::cur); r++; // =
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r += ReadString (value, s);
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s.seekg (1, std::ios_base::cur); r++; // ;
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m_Properties[key] = value;
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}
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CryptoPP::SHA256().CalculateDigest(m_IdentHash, (uint8_t *)&m_RouterIdentity, sizeof (m_RouterIdentity));
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}
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void RouterInfo::WriteToStream (std::ostream& s)
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{
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s.write ((char *)&m_RouterIdentity, sizeof (m_RouterIdentity));
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uint64_t ts = htobe64 (m_Timestamp);
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s.write ((char *)&ts, sizeof (ts));
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// addresses
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uint8_t numAddresses = m_Addresses.size ();
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s.write ((char *)&numAddresses, sizeof (numAddresses));
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for (auto& address : m_Addresses)
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{
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s.write ((char *)&address.cost, sizeof (address.cost));
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s.write ((char *)&address.date, sizeof (address.date));
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if (address.transportStyle == eTransportNTCP)
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WriteString ("NTCP", s);
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else if (address.transportStyle == eTransportSSU)
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WriteString ("SSU", s);
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else
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WriteString ("", s);
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std::stringstream properties;
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WriteString ("host", properties);
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properties << '=';
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WriteString (address.host, properties);
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properties << ';';
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WriteString ("port", properties);
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properties << '=';
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WriteString (boost::lexical_cast<std::string>(address.port), properties);
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properties << ';';
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uint16_t size = htobe16 (properties.str ().size ());
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s.write ((char *)&size, sizeof (size));
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s.write (properties.str ().c_str (), properties.str ().size ());
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}
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// peers
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uint8_t numPeers = 0;
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s.write ((char *)&numPeers, sizeof (numPeers));
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// properties
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std::stringstream properties;
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for (auto& p : m_Properties)
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{
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WriteString (p.first, properties);
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properties << '=';
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WriteString (p.second, properties);
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properties << ';';
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}
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uint16_t size = htobe16 (properties.str ().size ());
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s.write ((char *)&size, sizeof (size));
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s.write (properties.str ().c_str (), properties.str ().size ());
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}
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void RouterInfo::CreateBuffer ()
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{
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std::stringstream s;
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WriteToStream (s);
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m_BufferLen = s.str ().size ();
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memcpy (m_Buffer, s.str ().c_str (), m_BufferLen);
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// signature
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i2p::context.Sign ((uint8_t *)m_Buffer, m_BufferLen, (uint8_t *)m_Buffer + m_BufferLen);
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m_BufferLen += 40;
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}
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size_t RouterInfo::ReadString (char * str, std::istream& s)
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{
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uint8_t len;
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s.read ((char *)&len, 1);
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s.read (str, len);
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str[len] = 0;
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return len+1;
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}
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void RouterInfo::WriteString (const std::string& str, std::ostream& s)
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{
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uint8_t len = str.size ();
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s.write ((char *)&len, 1);
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s.write (str.c_str (), len);
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}
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void RouterInfo::AddNTCPAddress (const char * host, int port)
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{
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Address addr;
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addr.host = host;
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addr.port = port;
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addr.transportStyle = eTransportNTCP;
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addr.cost = 2;
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addr.date = 0;
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m_Addresses.push_back(addr);
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}
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void RouterInfo::SetProperty (const char * key, const char * value)
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{
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m_Properties[key] = value;
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}
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const char * RouterInfo::GetProperty (const char * key) const
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{
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auto it = m_Properties.find (key);
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if (it != m_Properties.end ())
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return it->second.c_str ();
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return 0;
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}
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bool RouterInfo::IsFloodfill () const
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{
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const char * caps = GetProperty ("caps");
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if (caps)
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return strchr (caps, 'f');
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return false;
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}
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bool RouterInfo::IsNTCP () const
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{
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for (auto& address : m_Addresses)
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{
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if (address.transportStyle == eTransportNTCP)
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return true;
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}
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return false;
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}
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RouterInfo::Address * RouterInfo::GetNTCPAddress ()
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{
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for (auto& address : m_Addresses)
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{
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if (address.transportStyle == eTransportNTCP)
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return &address;
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}
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return nullptr;
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}
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}
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}
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89
RouterInfo.h
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89
RouterInfo.h
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@ -0,0 +1,89 @@
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#ifndef ROUTER_INFO_H__
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#define ROUTER_INFO_H__
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#include <inttypes.h>
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#include <string>
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#include <map>
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#include <vector>
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#include <iostream>
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#include <boost/asio.hpp>
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namespace i2p
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{
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namespace data
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{
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#pragma pack (1)
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struct RouterIdentity
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{
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uint8_t publicKey[256];
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uint8_t signingKey[128];
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uint8_t certificate[3];
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};
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#pragma pack ()
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class RouterInfo
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{
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public:
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enum TransportStyle
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{
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eTransportUnknown = 0,
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eTransportNTCP,
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eTransportSSU
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};
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struct Address
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{
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TransportStyle transportStyle;
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std::string host;
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int port;
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uint64_t date;
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uint8_t cost;
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};
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RouterInfo (const char * filename);
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RouterInfo () = default;
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RouterInfo (const RouterInfo& ) = default;
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RouterInfo (const uint8_t * buf, int len);
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const RouterIdentity& GetRouterIdentity () const { return m_RouterIdentity; };
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void SetRouterIdentity (const RouterIdentity& identity);
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const uint8_t * GetIdentHash () const { return m_IdentHash; };
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const std::vector<Address>& GetAddresses () const { return m_Addresses; };
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Address * GetNTCPAddress ();
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void AddNTCPAddress (const char * host, int port);
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void SetProperty (const char * key, const char * value);
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const char * GetProperty (const char * key) const;
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bool IsFloodfill () const;
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bool IsNTCP () const;
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void CreateBuffer ();
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const char * GetBuffer () const { return m_Buffer; };
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int GetBufferLen () const { return m_BufferLen; };
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private:
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void ReadFromFile (const char * filename);
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void ReadFromStream (std::istream& s);
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void ReadFromBuffer ();
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void WriteToStream (std::ostream& s);
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size_t ReadString (char * str, std::istream& s);
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void WriteString (const std::string& str, std::ostream& s);
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private:
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RouterIdentity m_RouterIdentity;
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uint8_t m_IdentHash[32];
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char m_Buffer[2048];
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int m_BufferLen;
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uint64_t m_Timestamp;
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std::vector<Address> m_Addresses;
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std::map<std::string, std::string> m_Properties;
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};
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}
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}
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#endif
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