mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2025-04-27 11:17:49 +02:00
restructure build to separate the 3 main components into 3 subdirectories
libi2pd for core libs libi2pd_client for i2pd client libs daemon for i2pd daemon libs
This commit is contained in:
Jeff Becker
parent
b3161dde93
commit
4cc3b7f9fb
140 changed files with 209 additions and 206 deletions
567
libi2pd/Reseed.cpp
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567
libi2pd/Reseed.cpp
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#include <string.h>
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#include <fstream>
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#include <sstream>
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#include <boost/asio.hpp>
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#include <boost/asio/ssl.hpp>
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#include <boost/algorithm/string.hpp>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include <zlib.h>
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#include "Crypto.h"
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#include "I2PEndian.h"
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#include "Reseed.h"
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#include "FS.h"
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#include "Log.h"
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#include "Identity.h"
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#include "NetDb.h"
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#include "HTTP.h"
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#include "util.h"
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#include "Config.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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Reseeder::Reseeder()
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{
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}
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Reseeder::~Reseeder()
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{
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}
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/** @brief tries to bootstrap into I2P network (from local files and servers, with respect of options)
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*/
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void Reseeder::Bootstrap ()
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{
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std::string su3FileName; i2p::config::GetOption("reseed.file", su3FileName);
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std::string zipFileName; i2p::config::GetOption("reseed.zipfile", zipFileName);
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if (su3FileName.length() > 0) // bootstrap from SU3 file or URL
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{
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int num;
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if (su3FileName.length() > 8 && su3FileName.substr(0, 8) == "https://")
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{
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num = ReseedFromSU3Url (su3FileName); // from https URL
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}
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else
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{
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num = ProcessSU3File (su3FileName.c_str ());
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}
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if (num == 0)
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LogPrint (eLogWarning, "Reseed: failed to reseed from ", su3FileName);
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}
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else if (zipFileName.length() > 0) // bootstrap from ZIP file
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{
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int num = ProcessZIPFile (zipFileName.c_str ());
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if (num == 0)
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LogPrint (eLogWarning, "Reseed: failed to reseed from ", zipFileName);
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}
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else // bootstrap from reseed servers
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{
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int num = ReseedFromServers ();
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if (num == 0)
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LogPrint (eLogWarning, "Reseed: failed to reseed from servers");
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}
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}
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/** @brief bootstrap from random server, retry 10 times
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* @return number of entries added to netDb
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*/
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int Reseeder::ReseedFromServers ()
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{
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std::string reseedURLs; i2p::config::GetOption("reseed.urls", reseedURLs);
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std::vector<std::string> httpsReseedHostList;
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boost::split(httpsReseedHostList, reseedURLs, boost::is_any_of(","), boost::token_compress_on);
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if (reseedURLs.length () == 0)
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{
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LogPrint (eLogWarning, "Reseed: No reseed servers specified");
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return 0;
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}
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int reseedRetries = 0;
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while (reseedRetries < 10)
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{
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auto ind = rand () % httpsReseedHostList.size ();
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std::string reseedUrl = httpsReseedHostList[ind] + "i2pseeds.su3";
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auto num = ReseedFromSU3Url (reseedUrl);
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if (num > 0) return num; // success
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reseedRetries++;
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}
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LogPrint (eLogWarning, "Reseed: failed to reseed from servers after 10 attempts");
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return 0;
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}
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/** @brief bootstrap from HTTPS URL with SU3 file
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* @param url
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* @return number of entries added to netDb
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*/
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int Reseeder::ReseedFromSU3Url (const std::string& url)
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{
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LogPrint (eLogInfo, "Reseed: Downloading SU3 from ", url);
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std::string su3 = HttpsRequest (url);
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if (su3.length () > 0)
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{
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std::stringstream s(su3);
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return ProcessSU3Stream (s);
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}
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else
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{
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LogPrint (eLogWarning, "Reseed: SU3 download failed");
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return 0;
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}
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}
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int Reseeder::ProcessSU3File (const char * filename)
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{
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std::ifstream s(filename, std::ifstream::binary);
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if (s.is_open ())
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return ProcessSU3Stream (s);
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else
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{
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LogPrint (eLogError, "Reseed: Can't open file ", filename);
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return 0;
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}
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}
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int Reseeder::ProcessZIPFile (const char * filename)
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{
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std::ifstream s(filename, std::ifstream::binary);
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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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auto len = s.tellg ();
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s.seekg (0, std::ios::beg);
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return ProcessZIPStream (s, len);
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}
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else
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{
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LogPrint (eLogError, "Reseed: Can't open file ", filename);
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return 0;
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}
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}
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const char SU3_MAGIC_NUMBER[]="I2Psu3";
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int Reseeder::ProcessSU3Stream (std::istream& s)
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{
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char magicNumber[7];
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s.read (magicNumber, 7); // magic number and zero byte 6
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if (strcmp (magicNumber, SU3_MAGIC_NUMBER))
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{
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LogPrint (eLogError, "Reseed: Unexpected SU3 magic number");
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return 0;
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}
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s.seekg (1, std::ios::cur); // su3 file format version
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SigningKeyType signatureType;
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s.read ((char *)&signatureType, 2); // signature type
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signatureType = be16toh (signatureType);
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uint16_t signatureLength;
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s.read ((char *)&signatureLength, 2); // signature length
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signatureLength = be16toh (signatureLength);
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s.seekg (1, std::ios::cur); // unused
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uint8_t versionLength;
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s.read ((char *)&versionLength, 1); // version length
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s.seekg (1, std::ios::cur); // unused
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uint8_t signerIDLength;
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s.read ((char *)&signerIDLength, 1); // signer ID length
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uint64_t contentLength;
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s.read ((char *)&contentLength, 8); // content length
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contentLength = be64toh (contentLength);
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s.seekg (1, std::ios::cur); // unused
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uint8_t fileType;
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s.read ((char *)&fileType, 1); // file type
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if (fileType != 0x00) // zip file
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{
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LogPrint (eLogError, "Reseed: Can't handle file type ", (int)fileType);
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return 0;
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}
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s.seekg (1, std::ios::cur); // unused
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uint8_t contentType;
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s.read ((char *)&contentType, 1); // content type
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if (contentType != 0x03) // reseed data
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{
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LogPrint (eLogError, "Reseed: Unexpected content type ", (int)contentType);
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return 0;
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}
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s.seekg (12, std::ios::cur); // unused
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s.seekg (versionLength, std::ios::cur); // skip version
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char signerID[256];
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s.read (signerID, signerIDLength); // signerID
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signerID[signerIDLength] = 0;
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bool verify; i2p::config::GetOption("reseed.verify", verify);
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if (verify)
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{
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//try to verify signature
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auto it = m_SigningKeys.find (signerID);
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if (it != m_SigningKeys.end ())
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{
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// TODO: implement all signature types
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if (signatureType == SIGNING_KEY_TYPE_RSA_SHA512_4096)
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{
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size_t pos = s.tellg ();
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size_t tbsLen = pos + contentLength;
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uint8_t * tbs = new uint8_t[tbsLen];
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s.seekg (0, std::ios::beg);
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s.read ((char *)tbs, tbsLen);
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uint8_t * signature = new uint8_t[signatureLength];
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s.read ((char *)signature, signatureLength);
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// RSA-raw
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{
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// calculate digest
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uint8_t digest[64];
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SHA512 (tbs, tbsLen, digest);
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// encrypt signature
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BN_CTX * bnctx = BN_CTX_new ();
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BIGNUM * s = BN_new (), * n = BN_new ();
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BN_bin2bn (signature, signatureLength, s);
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BN_bin2bn (it->second, i2p::crypto::RSASHA5124096_KEY_LENGTH, n);
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BN_mod_exp (s, s, i2p::crypto::GetRSAE (), n, bnctx); // s = s^e mod n
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uint8_t * enSigBuf = new uint8_t[signatureLength];
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i2p::crypto::bn2buf (s, enSigBuf, signatureLength);
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// digest is right aligned
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// we can't use RSA_verify due wrong padding in SU3
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if (memcmp (enSigBuf + (signatureLength - 64), digest, 64))
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LogPrint (eLogWarning, "Reseed: SU3 signature verification failed");
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else
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verify = false; // verified
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delete[] enSigBuf;
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BN_free (s); BN_free (n);
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BN_CTX_free (bnctx);
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}
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delete[] signature;
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delete[] tbs;
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s.seekg (pos, std::ios::beg);
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}
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else
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LogPrint (eLogWarning, "Reseed: Signature type ", signatureType, " is not supported");
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}
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else
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LogPrint (eLogWarning, "Reseed: Certificate for ", signerID, " not loaded");
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}
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if (verify) // not verified
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{
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LogPrint (eLogError, "Reseed: SU3 verification failed");
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return 0;
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}
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// handle content
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return ProcessZIPStream (s, contentLength);
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}
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const uint32_t ZIP_HEADER_SIGNATURE = 0x04034B50;
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const uint32_t ZIP_CENTRAL_DIRECTORY_HEADER_SIGNATURE = 0x02014B50;
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const uint16_t ZIP_BIT_FLAG_DATA_DESCRIPTOR = 0x0008;
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int Reseeder::ProcessZIPStream (std::istream& s, uint64_t contentLength)
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{
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int numFiles = 0;
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size_t contentPos = s.tellg ();
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while (!s.eof ())
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{
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uint32_t signature;
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s.read ((char *)&signature, 4);
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signature = le32toh (signature);
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if (signature == ZIP_HEADER_SIGNATURE)
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{
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// next local file
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s.seekg (2, std::ios::cur); // version
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uint16_t bitFlag;
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s.read ((char *)&bitFlag, 2);
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bitFlag = le16toh (bitFlag);
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uint16_t compressionMethod;
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s.read ((char *)&compressionMethod, 2);
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compressionMethod = le16toh (compressionMethod);
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s.seekg (4, std::ios::cur); // skip fields we don't care about
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uint32_t compressedSize, uncompressedSize;
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uint32_t crc_32;
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s.read ((char *)&crc_32, 4);
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crc_32 = le32toh (crc_32);
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s.read ((char *)&compressedSize, 4);
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compressedSize = le32toh (compressedSize);
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s.read ((char *)&uncompressedSize, 4);
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uncompressedSize = le32toh (uncompressedSize);
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uint16_t fileNameLength, extraFieldLength;
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s.read ((char *)&fileNameLength, 2);
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fileNameLength = le16toh (fileNameLength);
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if ( fileNameLength > 255 ) {
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// too big
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LogPrint(eLogError, "Reseed: SU3 fileNameLength too large: ", fileNameLength);
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return numFiles;
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}
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s.read ((char *)&extraFieldLength, 2);
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extraFieldLength = le16toh (extraFieldLength);
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char localFileName[255];
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s.read (localFileName, fileNameLength);
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localFileName[fileNameLength] = 0;
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s.seekg (extraFieldLength, std::ios::cur);
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// take care about data desriptor if presented
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if (bitFlag & ZIP_BIT_FLAG_DATA_DESCRIPTOR)
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{
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size_t pos = s.tellg ();
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if (!FindZipDataDescriptor (s))
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{
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LogPrint (eLogError, "Reseed: SU3 archive data descriptor not found");
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return numFiles;
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}
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s.read ((char *)&crc_32, 4);
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crc_32 = le32toh (crc_32);
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s.read ((char *)&compressedSize, 4);
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compressedSize = le32toh (compressedSize) + 4; // ??? we must consider signature as part of compressed data
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s.read ((char *)&uncompressedSize, 4);
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uncompressedSize = le32toh (uncompressedSize);
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// now we know compressed and uncompressed size
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s.seekg (pos, std::ios::beg); // back to compressed data
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}
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LogPrint (eLogDebug, "Reseed: Proccessing file ", localFileName, " ", compressedSize, " bytes");
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if (!compressedSize)
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{
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LogPrint (eLogWarning, "Reseed: Unexpected size 0. Skipped");
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continue;
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}
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uint8_t * compressed = new uint8_t[compressedSize];
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s.read ((char *)compressed, compressedSize);
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if (compressionMethod) // we assume Deflate
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{
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z_stream inflator;
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memset (&inflator, 0, sizeof (inflator));
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inflateInit2 (&inflator, -MAX_WBITS); // no zlib header
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uint8_t * uncompressed = new uint8_t[uncompressedSize];
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inflator.next_in = compressed;
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inflator.avail_in = compressedSize;
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inflator.next_out = uncompressed;
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inflator.avail_out = uncompressedSize;
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int err;
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if ((err = inflate (&inflator, Z_SYNC_FLUSH)) >= 0)
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{
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uncompressedSize -= inflator.avail_out;
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if (crc32 (0, uncompressed, uncompressedSize) == crc_32)
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{
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i2p::data::netdb.AddRouterInfo (uncompressed, uncompressedSize);
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numFiles++;
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}
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else
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LogPrint (eLogError, "Reseed: CRC32 verification failed");
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}
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else
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LogPrint (eLogError, "Reseed: SU3 decompression error ", err);
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delete[] uncompressed;
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inflateEnd (&inflator);
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}
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else // no compression
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{
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i2p::data::netdb.AddRouterInfo (compressed, compressedSize);
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numFiles++;
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}
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delete[] compressed;
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if (bitFlag & ZIP_BIT_FLAG_DATA_DESCRIPTOR)
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s.seekg (12, std::ios::cur); // skip data descriptor section if presented (12 = 16 - 4)
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}
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else
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{
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if (signature != ZIP_CENTRAL_DIRECTORY_HEADER_SIGNATURE)
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LogPrint (eLogWarning, "Reseed: Missing zip central directory header");
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break; // no more files
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}
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size_t end = s.tellg ();
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if (end - contentPos >= contentLength)
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break; // we are beyond contentLength
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}
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if (numFiles) // check if routers are not outdated
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{
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auto ts = i2p::util::GetMillisecondsSinceEpoch ();
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int numOutdated = 0;
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i2p::data::netdb.VisitRouterInfos (
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[&numOutdated, ts](std::shared_ptr<const RouterInfo> r)
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{
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if (r && ts > r->GetTimestamp () + 10*i2p::data::NETDB_MAX_EXPIRATION_TIMEOUT*1000LL) // 270 hours
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{
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LogPrint (eLogError, "Reseed: router ", r->GetIdentHash().ToBase64 (), " is outdated by ", (ts - r->GetTimestamp ())/1000LL/3600LL, " hours");
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numOutdated++;
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}
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});
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if (numOutdated > numFiles/2) // more than half
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{
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LogPrint (eLogError, "Reseed: mammoth's shit\n"
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" *_____*\n"
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" *_*****_*\n"
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" *_(O)_(O)_*\n"
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" **____V____**\n"
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" **_________**\n"
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" **_________**\n"
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" *_________*\n"
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" ***___***");
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i2p::data::netdb.ClearRouterInfos ();
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numFiles = 0;
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}
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}
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return numFiles;
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}
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const uint8_t ZIP_DATA_DESCRIPTOR_SIGNATURE[] = { 0x50, 0x4B, 0x07, 0x08 };
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bool Reseeder::FindZipDataDescriptor (std::istream& s)
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{
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size_t nextInd = 0;
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while (!s.eof ())
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{
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uint8_t nextByte;
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s.read ((char *)&nextByte, 1);
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if (nextByte == ZIP_DATA_DESCRIPTOR_SIGNATURE[nextInd])
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{
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nextInd++;
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if (nextInd >= sizeof (ZIP_DATA_DESCRIPTOR_SIGNATURE))
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return true;
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}
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else
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nextInd = 0;
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}
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return false;
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}
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void Reseeder::LoadCertificate (const std::string& filename)
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{
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SSL_CTX * ctx = SSL_CTX_new (TLS_method ());
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int ret = SSL_CTX_use_certificate_file (ctx, filename.c_str (), SSL_FILETYPE_PEM);
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if (ret)
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{
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SSL * ssl = SSL_new (ctx);
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X509 * cert = SSL_get_certificate (ssl);
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// verify
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if (cert)
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{
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// extract issuer name
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char name[100];
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X509_NAME_oneline (X509_get_issuer_name(cert), name, 100);
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char * cn = strstr (name, "CN=");
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if (cn)
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{
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cn += 3;
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char * terminator = strchr (cn, '/');
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if (terminator) terminator[0] = 0;
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}
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// extract RSA key (we need n only, e = 65537)
|
||||
RSA * key = EVP_PKEY_get0_RSA (X509_get_pubkey (cert));
|
||||
const BIGNUM * n, * e, * d;
|
||||
RSA_get0_key(key, &n, &e, &d);
|
||||
PublicKey value;
|
||||
i2p::crypto::bn2buf (n, value, 512);
|
||||
if (cn)
|
||||
m_SigningKeys[cn] = value;
|
||||
else
|
||||
LogPrint (eLogError, "Reseed: Can't find CN field in ", filename);
|
||||
}
|
||||
SSL_free (ssl);
|
||||
}
|
||||
else
|
||||
LogPrint (eLogError, "Reseed: Can't open certificate file ", filename);
|
||||
SSL_CTX_free (ctx);
|
||||
}
|
||||
|
||||
void Reseeder::LoadCertificates ()
|
||||
{
|
||||
std::string certDir = i2p::fs::DataDirPath("certificates", "reseed");
|
||||
std::vector<std::string> files;
|
||||
int numCertificates = 0;
|
||||
|
||||
if (!i2p::fs::ReadDir(certDir, files)) {
|
||||
LogPrint(eLogWarning, "Reseed: Can't load reseed certificates from ", certDir);
|
||||
return;
|
||||
}
|
||||
|
||||
for (const std::string & file : files) {
|
||||
if (file.compare(file.size() - 4, 4, ".crt") != 0) {
|
||||
LogPrint(eLogWarning, "Reseed: ignoring file ", file);
|
||||
continue;
|
||||
}
|
||||
LoadCertificate (file);
|
||||
numCertificates++;
|
||||
}
|
||||
LogPrint (eLogInfo, "Reseed: ", numCertificates, " certificates loaded");
|
||||
}
|
||||
|
||||
std::string Reseeder::HttpsRequest (const std::string& address)
|
||||
{
|
||||
i2p::http::URL url;
|
||||
if (!url.parse(address)) {
|
||||
LogPrint(eLogError, "Reseed: failed to parse url: ", address);
|
||||
return "";
|
||||
}
|
||||
url.schema = "https";
|
||||
if (!url.port)
|
||||
url.port = 443;
|
||||
|
||||
boost::asio::io_service service;
|
||||
boost::system::error_code ecode;
|
||||
auto it = boost::asio::ip::tcp::resolver(service).resolve (
|
||||
boost::asio::ip::tcp::resolver::query (url.host, std::to_string(url.port)), ecode);
|
||||
if (!ecode)
|
||||
{
|
||||
boost::asio::ssl::context ctx(service, boost::asio::ssl::context::sslv23);
|
||||
ctx.set_verify_mode(boost::asio::ssl::context::verify_none);
|
||||
boost::asio::ssl::stream<boost::asio::ip::tcp::socket> s(service, ctx);
|
||||
s.lowest_layer().connect (*it, ecode);
|
||||
if (!ecode)
|
||||
{
|
||||
SSL_set_tlsext_host_name(s.native_handle(), url.host.c_str ());
|
||||
s.handshake (boost::asio::ssl::stream_base::client, ecode);
|
||||
if (!ecode)
|
||||
{
|
||||
LogPrint (eLogDebug, "Reseed: Connected to ", url.host, ":", url.port);
|
||||
i2p::http::HTTPReq req;
|
||||
req.uri = url.to_string();
|
||||
req.AddHeader("User-Agent", "Wget/1.11.4");
|
||||
req.AddHeader("Connection", "close");
|
||||
s.write_some (boost::asio::buffer (req.to_string()));
|
||||
// read response
|
||||
std::stringstream rs;
|
||||
char recv_buf[1024]; size_t l = 0;
|
||||
do {
|
||||
l = s.read_some (boost::asio::buffer (recv_buf, sizeof(recv_buf)), ecode);
|
||||
if (l) rs.write (recv_buf, l);
|
||||
} while (!ecode && l);
|
||||
// process response
|
||||
std::string data = rs.str();
|
||||
i2p::http::HTTPRes res;
|
||||
int len = res.parse(data);
|
||||
if (len <= 0) {
|
||||
LogPrint(eLogWarning, "Reseed: incomplete/broken response from ", url.host);
|
||||
return "";
|
||||
}
|
||||
if (res.code != 200) {
|
||||
LogPrint(eLogError, "Reseed: failed to reseed from ", url.host, ", http code ", res.code);
|
||||
return "";
|
||||
}
|
||||
data.erase(0, len); /* drop http headers from response */
|
||||
LogPrint(eLogDebug, "Reseed: got ", data.length(), " bytes of data from ", url.host);
|
||||
if (res.is_chunked()) {
|
||||
std::stringstream in(data), out;
|
||||
if (!i2p::http::MergeChunkedResponse(in, out)) {
|
||||
LogPrint(eLogWarning, "Reseed: failed to merge chunked response from ", url.host);
|
||||
return "";
|
||||
}
|
||||
LogPrint(eLogDebug, "Reseed: got ", data.length(), "(", out.tellg(), ") bytes of data from ", url.host);
|
||||
data = out.str();
|
||||
}
|
||||
return data;
|
||||
}
|
||||
else
|
||||
LogPrint (eLogError, "Reseed: SSL handshake failed: ", ecode.message ());
|
||||
}
|
||||
else
|
||||
LogPrint (eLogError, "Reseed: Couldn't connect to ", url.host, ": ", ecode.message ());
|
||||
}
|
||||
else
|
||||
LogPrint (eLogError, "Reseed: Couldn't resolve address ", url.host, ": ", ecode.message ());
|
||||
return "";
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue