protocol.cpp

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// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin developers
// Copyright (c) 2014-2015 The Dash developers
// Copyright (c) 2015-2018 The PIVX developers
// Copyright (c) 2018-2020 The DAPS Project developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#include "rpc/protocol.h"
 
#include "random.h"
#include "tinyformat.h"
#include "util.h"
#include "utilstrencodings.h"
#include "utiltime.h"
#include "version.h"
 
#include <stdint.h>
#include <fstream>
 
 
 
std::string JSONRPCRequest(const std::string& strMethod, const UniValue& params, const UniValue& id)
{
    UniValue request(UniValue::VOBJ);
    request.push_back(Pair("method", strMethod));
    request.push_back(Pair("params", params));
    request.push_back(Pair("id", id));
    return request.write() + "\n";
}
 
UniValue JSONRPCReplyObj(const UniValue& result, const UniValue& error, const UniValue& id)
{
    UniValue reply(UniValue::VOBJ);
    if (!error.isNull())
        reply.push_back(Pair("result", NullUniValue));
    else
        reply.push_back(Pair("result", result));
    reply.push_back(Pair("error", error));
    reply.push_back(Pair("id", id));
    return reply;
}
 
std::string JSONRPCReply(const UniValue& result, const UniValue& error, const UniValue& id)
{
    UniValue reply = JSONRPCReplyObj(result, error, id);
    return reply.write() + "\n";
}
 
UniValue JSONRPCError(int code, const std::string& message)
{
    UniValue error(UniValue::VOBJ);
    error.push_back(Pair("code", code));
    error.push_back(Pair("message", message));
    return error;
}
 
 
static const std::string COOKIEAUTH_USER = "__cookie__";
static const std::string COOKIEAUTH_FILE = ".cookie";
 
fs::path GetAuthCookieFile()
{
    fs::path path(GetArg("-rpccookiefile", COOKIEAUTH_FILE));
    return AbsPathForConfigVal(path);
}
 
bool GenerateAuthCookie(std::string *cookie_out)
{
    unsigned char rand_pwd[32];
    GetRandBytes(rand_pwd, 32);
    std::string cookie = COOKIEAUTH_USER + ":" + EncodeBase64(&rand_pwd[0],32);
 
    std::ofstream file;
    fs::path filepath = GetAuthCookieFile();
    file.open(filepath.string().c_str());
    if (!file.is_open()) {
        LogPrintf("Unable to open cookie authentication file %s for writing\n", filepath.string());
        return false;
    }
    file << cookie;
    file.close();
    LogPrintf("Generated RPC authentication cookie %s\n", filepath.string());
 
    if (cookie_out)
        *cookie_out = cookie;
    return true;
}
 
bool GetAuthCookie(std::string *cookie_out)
{
    std::ifstream file;
    std::string cookie;
    fs::path filepath = GetAuthCookieFile();
    file.open(filepath.string().c_str());
    if (!file.is_open())
        return false;
    std::getline(file, cookie);
    file.close();
 
    if (cookie_out)
        *cookie_out = cookie;
    return true;
}
 
void DeleteAuthCookie()
{
    try {
        fs::remove(GetAuthCookieFile());
    } catch (const fs::filesystem_error& e) {
        LogPrintf("%s: Unable to remove random auth cookie file: %s\n", __func__, e.what());
    }
}