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Added contract-based config file. (#4)

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Added contract-based config file and command line flow. Added contract creation and rekey support.
This commit is contained in:
Ravin Perera
2019-09-27 15:55:49 +05:30
committed by GitHub
parent 0382475de1
commit 36fae44008
8 changed files with 252 additions and 114 deletions
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17
README.md
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@@ -10,3 +10,20 @@ A C++ version of hotpocket designed for production envrionments, original protot
* Websockets - Boost|Beast https://github.com/boostorg/beast
* RapidJSON - http://rapidjson.org
* Protocol - https://github.com/protocolbuffers/protobuf
### Installing Boost
Instructions are based on https://www.boost.org/doc/libs/1_71_0/more/getting_started/unix-variants.html#prepare-to-use-a-boost-library-binary
1. Download and extract boost package from [here](https://www.boost.org/users/history/version_1_71_0.html).
2. Navigate to the extracted boost directory in a terminal.
3. Run `./bootstrap.sh`
4. Run `sudo ./b2 install` (This will compile and install boost libraries into your `/usr/local/lib`)
5. Run `sudo ldconfig` (This will update your library cache and avoid potential issues when running your compiled C++ program which links to newly installed boost libraries)
## Running hotpocket
1. navigate to the src root.
2. Run `make`
3. Run `./build/hpcore new ~/mycontract`. This will initialize a new contract directory `mycontract` in your home directory.
4. Take a look at `~/mycontract/cfg/hp.cfg`. This is your new contract config file. You can modify it according to your contract hosting requirements.
5. Run `./build/hpcore rekey ~/mycontract` to generate new public/private key pair.
6. Run `./build/hpcore run ~/mycontract` to run your smart contract (to do).

2
makefile
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@@ -1,4 +1,4 @@
all:
mkdir -p build
g++ src/*.cpp -lsodium -std=c++17 -o build/hpcore
g++ src/*.cpp -lsodium -lboost_system -lboost_filesystem -std=c++17 -o build/hpcore
echo 'build successful, binary in '`pwd`'/build/hpcore'

14
myctr/cfg/hp.cfg Normal file
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@@ -0,0 +1,14 @@
{
"pubkeyb64": "QJobte+YoDi0jfkp1yrARYudB0E4Bo5RQ1YJpaqkSPs=",
"seckeyb64": "CfjHaSvWG3JbHqJxsj9prDZiw8tEzwkYlfciKsOJ3uhAmhu175igOLSN+SnXKsBFi50HQTgGjlFDVgmlqqRI+w==",
"binary": "",
"binargs": "",
"listenip": "0.0.0.0",
"peers": [],
"unl": [],
"peerport": 22860,
"roundtime": 1000,
"pubport": 8080,
"pubmaxsize": 65536,
"pubmaxcpm": 100
}

178
src/conf.cpp
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@@ -2,11 +2,14 @@
#include <iostream>
#include <fstream>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "lib/rapidjson/document.h"
#include "lib/rapidjson/istreamwrapper.h"
#include "lib/rapidjson/ostreamwrapper.h"
#include "lib/rapidjson/writer.h"
#include "lib/rapidjson/prettywriter.h"
#include "conf.h"
#include <boost/filesystem.hpp>
using namespace std;
using namespace rapidjson;
@@ -14,47 +17,172 @@ using namespace rapidjson;
namespace conf
{
static const char * configPath;
ContractCtx ctx;
ContractConfig cfg;
string get_full_path(const char *filename)
void load_config()
{
string fullpath = configPath;
fullpath += filename;
return fullpath;
}
void load(const char *filename, Document &d)
{
ifstream ifs(get_full_path(filename));
ifstream ifs(ctx.configFile);
IStreamWrapper isw(ifs);
Document d;
d.ParseStream(isw);
cfg.pubkeyb64 = d["pubkeyb64"].GetString();
cfg.seckeyb64 = d["seckeyb64"].GetString();
cfg.binary = d["binary"].GetString();
cfg.binargs = d["binargs"].GetString();
cfg.listenip = d["listenip"].GetString();
cfg.peers.clear();
for (auto &v : d["peers"].GetArray())
cfg.peers.push_back(v.GetString());
cfg.unl.clear();
for (auto &v : d["unl"].GetArray())
cfg.unl.push_back(v.GetString());
cfg.peerport = d["peerport"].GetInt();
cfg.roundtime = d["roundtime"].GetInt();
cfg.pubport = d["pubport"].GetInt();
cfg.pubmaxsize = d["pubmaxsize"].GetInt();
cfg.pubmaxcpm = d["pubmaxcpm"].GetInt();
}
void save(const char *filename, Document &d)
void save_config()
{
ofstream ofs(get_full_path(filename));
Document d;
d.SetObject();
Document::AllocatorType &allocator = d.GetAllocator();
d.AddMember("pubkeyb64", StringRef(cfg.pubkeyb64.c_str()), allocator);
d.AddMember("seckeyb64", StringRef(cfg.seckeyb64.c_str()), allocator);
d.AddMember("binary", StringRef(cfg.binary.c_str()), allocator);
d.AddMember("binargs", StringRef(cfg.binargs.c_str()), allocator);
d.AddMember("listenip", StringRef(cfg.listenip.c_str()), allocator);
Value peers(kArrayType);
d.AddMember("peers", peers, allocator);
for (int i = 0; i < cfg.peers.size(); i++)
{
Value v;
v.SetString(StringRef(cfg.peers[i].c_str()), allocator);
peers.PushBack(v, allocator);
}
Value unl(kArrayType);
d.AddMember("unl", unl, allocator);
for (int i = 0; i < cfg.unl.size(); i++)
{
Value v;
v.SetString(StringRef(cfg.unl[i].c_str()), allocator);
unl.PushBack(v, allocator);
}
d.AddMember("peerport", cfg.peerport, allocator);
d.AddMember("roundtime", cfg.roundtime, allocator);
d.AddMember("pubport", cfg.pubport, allocator);
d.AddMember("pubmaxsize", cfg.pubmaxsize, allocator);
d.AddMember("pubmaxcpm", cfg.pubmaxcpm, allocator);
ofstream ofs(ctx.configFile);
OStreamWrapper osw(ofs);
Writer<OStreamWrapper> writer(osw);
PrettyWriter<OStreamWrapper> writer(osw);
d.Accept(writer);
}
string get_exec_path()
int parse_cmd(int argc, char **argv)
{
char buf[PATH_MAX + 1];
if (readlink("/proc/self/exe", buf, sizeof(buf) - 1) == -1)
throw string("readlink() failed");
string str(buf);
return str.substr(0, str.rfind('/') + 1);
if (argc == 3) //We get working dir as an arg anyway. So we need to check for 1+2 args.
{
string command(argv[1]);
if (command == "run" || command == "new" || command == "rekey")
{
ctx.command = command;
string dir = argv[2];
if (dir[dir.size() - 1] == '/')
dir = dir.substr(0, dir.size() - 1);
ctx.contractDir = dir;
ctx.configDir = dir + "/cfg";
ctx.configFile = ctx.configDir + "/hp.cfg";
ctx.histDir = dir + "/hist";
ctx.stateDir = dir + "/state";
ctx.binDir = dir + "/bin";
return 1;
}
else
{
cerr << "Invalid command. 'run | new | rekey' expected.\n";
}
}
else
{
cerr << "Argument count mismatch.\n";
}
cout << "Usage: hpcore <command> <contract dir> (command = run | new |rekey)\n";
cout << "Example: hpcore run ~/mycontract\n";
return 0;
}
int init()
int create_contract()
{
string execPath = get_exec_path();
char * confPathChar = (char *)malloc(execPath.size() + 1);
strcpy(confPathChar, &execPath[0]);
configPath = confPathChar;
struct stat dirInfo;
if (boost::filesystem::exists(ctx.contractDir))
{
cerr << "Contract dir already exists.\n";
return 0;
}
boost::filesystem::create_directories(ctx.configDir);
boost::filesystem::create_directories(ctx.binDir);
boost::filesystem::create_directories(ctx.histDir);
boost::filesystem::create_directories(ctx.stateDir);
//Create config file with default settings.
cfg.listenip = "0.0.0.0";
cfg.peerport = 22860;
cfg.roundtime = 1000;
cfg.pubport = 8080;
cfg.pubmaxsize = 65536;
cfg.pubmaxcpm = 100;
save_config();
return 1;
}
int rekey()
{
//Clear the keys and save the config. crpyto::init will automatically init the keys.
cfg.pubkeyb64 = "";
cfg.seckeyb64 = "";
save_config();
}
int init(int argc, char **argv)
{
if (!parse_cmd(argc, argv))
return 0;
if (ctx.command == "new")
{
if (!create_contract())
return 0;
load_config();
}
else if (ctx.command == "rekey")
{
load_config();
rekey();
}
else if (ctx.command == "run")
{
load_config();
//TO DO: Contract run logic.
}
return 1;
}

38
src/conf.h
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@@ -2,6 +2,7 @@
#define _HP_CONF_H_
#include "lib/rapidjson/document.h"
#include <vector>
using namespace std;
using namespace rapidjson;
@@ -9,9 +10,40 @@ using namespace rapidjson;
namespace conf
{
int init();
void load(const char *filename, Document &d);
void save(const char *filename, Document &d);
struct ContractCtx
{
string command;
string contractDir;
string histDir;
string stateDir;
string binDir;
string configDir;
string configFile;
};
struct ContractConfig
{
string pubkeyb64;
string seckeyb64;
unsigned char* pubkey;
unsigned char* seckey;
string binary;
string binargs;
string listenip;
vector<string> peers;
vector<string> unl;
int peerport;
int roundtime;
int pubport;
int pubmaxsize;
int pubmaxcpm;
};
extern ContractCtx ctx;
extern ContractConfig cfg;
int init(int argc, char **argv);
void load_config();
void save_config();
} // namespace conf

106
src/crypto.cpp
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@@ -1,9 +1,7 @@
#include <cstdio>
#include <iostream>
#include <sodium.h>
#include <fstream>
#include "base64.h"
#include "lib/rapidjson/document.h"
#include "conf.h"
#include "crypto.h"
@@ -12,88 +10,32 @@ using namespace rapidjson;
namespace crypto
{
static const char CFG_FILE[] = "keys.cfg";
//Struct used for storing in JSON
struct KeyPairB64
{
const char *publicKey;
const char *privateKey;
};
//Struct used for crypto operations
struct KeyPairCrypto
{
unsigned char *publicKey;
unsigned char *privateKey;
};
static KeyPairB64 b64KeyPair;
static KeyPairCrypto cryptoKeyPair;
unsigned long long get_sig_len()
{
return crypto_sign_BYTES;
}
void sign(const unsigned char *msg, unsigned long long msg_len, unsigned char *sig)
void sign(const unsigned char *msg, unsigned long long msg_len, unsigned char *sig, const unsigned char *seckey)
{
crypto_sign_detached(sig, NULL, msg, msg_len, cryptoKeyPair.privateKey);
crypto_sign_detached(sig, NULL, msg, msg_len, seckey);
}
bool verify(const unsigned char *msg, unsigned long long msg_len, const unsigned char *sig)
bool verify(const unsigned char *msg, unsigned long long msg_len, const unsigned char *sig, const unsigned char *pubkey)
{
int result = crypto_sign_verify_detached(sig, msg, msg_len, cryptoKeyPair.publicKey);
int result = crypto_sign_verify_detached(sig, msg, msg_len, pubkey);
return result == 0;
}
void load_keys_b64()
{
Document d;
conf::load(CFG_FILE, d);
if (!d.IsNull())
{
b64KeyPair.publicKey = d["public"].GetString();
b64KeyPair.privateKey = d["private"].GetString();
}
else
{
b64KeyPair.publicKey = NULL;
b64KeyPair.privateKey = NULL;
}
}
void save_keys_b64()
{
Document d;
d.SetObject();
Document::AllocatorType &allocator = d.GetAllocator();
d.AddMember("public", StringRef(b64KeyPair.publicKey), allocator);
d.AddMember("private", StringRef(b64KeyPair.privateKey), allocator);
conf::save(CFG_FILE, d);
}
void cryptopair_to_b64()
{
string b64PubKey = base64_encode(cryptoKeyPair.publicKey, crypto_sign_PUBLICKEYBYTES);
string b64PrivKey = base64_encode(cryptoKeyPair.privateKey, crypto_sign_SECRETKEYBYTES);
char *b64PubKeyChar = (char *)malloc(b64PubKey.size() + 1);
char *b64PrivKeyChar = (char *)malloc(b64PrivKey.size() + 1);
strcpy(b64PubKeyChar, &b64PubKey[0]);
strcpy(b64PrivKeyChar, &b64PrivKey[0]);
b64KeyPair.publicKey = b64PubKeyChar;
b64KeyPair.privateKey = b64PrivKeyChar;
conf::cfg.pubkeyb64 = base64_encode(conf::cfg.pubkey, crypto_sign_PUBLICKEYBYTES);
conf::cfg.seckeyb64 = base64_encode(conf::cfg.seckey, crypto_sign_SECRETKEYBYTES);
}
void b64pair_to_crypto()
{
vector<unsigned char> pubDecoded = base64_decode(b64KeyPair.publicKey);
vector<unsigned char> privDecoded = base64_decode(b64KeyPair.privateKey);
vector<unsigned char> pubDecoded = base64_decode(conf::cfg.pubkeyb64);
vector<unsigned char> privDecoded = base64_decode(conf::cfg.seckeyb64);
unsigned char *pubDecodedBytes = (unsigned char *)malloc(pubDecoded.size());
unsigned char *privDecodedBytes = (unsigned char *)malloc(privDecoded.size());
@@ -107,18 +49,27 @@ void b64pair_to_crypto()
privDecodedBytes[i] = privDecoded[i];
}
cryptoKeyPair.publicKey = pubDecodedBytes;
cryptoKeyPair.privateKey = privDecodedBytes;
if (conf::cfg.pubkey != NULL)
free(conf::cfg.pubkey);
if (conf::cfg.seckey != NULL)
free(conf::cfg.seckey);
conf::cfg.pubkey = pubDecodedBytes;
conf::cfg.seckey = privDecodedBytes;
}
void generate_crypto_keys()
{
unsigned char *pubKey = (unsigned char *)malloc(crypto_sign_PUBLICKEYBYTES);
unsigned char *privKey = (unsigned char *)malloc(crypto_sign_SECRETKEYBYTES);
crypto_sign_keypair(pubKey, privKey);
if (conf::cfg.pubkey != NULL)
free(conf::cfg.pubkey);
cryptoKeyPair.publicKey = pubKey;
cryptoKeyPair.privateKey = privKey;
if (conf::cfg.seckey != NULL)
free(conf::cfg.seckey);
conf::cfg.pubkey = (unsigned char *)malloc(crypto_sign_PUBLICKEYBYTES);
conf::cfg.seckey = (unsigned char *)malloc(crypto_sign_SECRETKEYBYTES);
crypto_sign_keypair(conf::cfg.pubkey, conf::cfg.seckey);
}
int init()
@@ -129,20 +80,17 @@ int init()
return 0;
}
load_keys_b64();
//If any keys are missing generate a new pair and save to file.
if (!b64KeyPair.publicKey || !b64KeyPair.privateKey)
if (conf::cfg.pubkeyb64.empty() || conf::cfg.seckeyb64.empty())
{
cout << "Keys not found. Generating.\n";
cout << "Generating new keys.\n";
generate_crypto_keys();
cryptopair_to_b64();
save_keys_b64();
conf::save_config();
}
else
{
b64pair_to_crypto();
cout << "Keys loaded from file.\n";
}
return 1;

4
src/crypto.h
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@@ -8,8 +8,8 @@ namespace crypto
int init();
unsigned long long get_sig_len();
void sign(const unsigned char *msg, unsigned long long msg_len, unsigned char *sig);
bool verify(const unsigned char *msg, unsigned long long msg_len, const unsigned char *sig);
void sign(const unsigned char *msg, unsigned long long msg_len, unsigned char *sig, const unsigned char *seckey);
bool verify(const unsigned char *msg, unsigned long long msg_len, const unsigned char *sig, const unsigned char *pubkey);
} // namespace crypto

7
src/main.cpp
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@@ -11,7 +11,7 @@ using namespace std;
int main(int argc, char **argv)
{
if (!conf::init() || !crypto::init())
if (!(conf::init(argc, argv) && crypto::init()))
{
cerr << "Init error\n";
return -1;
@@ -20,9 +20,9 @@ int main(int argc, char **argv)
//Example sign and verification.
unsigned char msg[10] = "hotpocket";
unsigned char *sig = new unsigned char[crypto::get_sig_len()];
crypto::sign(msg, 10, sig);
crypto::sign(msg, 10, sig, conf::cfg.seckey);
bool isValid = crypto::verify(msg, 10, sig);
bool isValid = crypto::verify(msg, 10, sig, conf::cfg.pubkey);
if (isValid)
cout << "Signature verified.\n";
else
@@ -31,4 +31,3 @@ int main(int argc, char **argv)
cout << "exited normally\n";
return 0;
}