183 lines
4.0 KiB
C++
183 lines
4.0 KiB
C++
#ifndef __WALLET_H__
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#define __WALLET_H__
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#include <cstring>
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#include <vector>
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#include <ostream>
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#include <sstream>
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#include <iostream>
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#include "rapidjson/document.h"
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#include "rapidjson/writer.h"
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#include "rapidjson/stringbuffer.h"
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#include "rapidjson/prettywriter.h"
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#define HEX_CHARS "0123456789abcdefABCDEF"
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#define WALLET_VECTOR_LENGTH 130
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#define WALLET_HEX_STRING_LENGTH WALLET_VECTOR_LENGTH*2
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#define WALLET_LENGTH 4
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#define WALLET_POINT_LENGTH 32
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using namespace rapidjson;
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class Wallet : public std::vector<uint8_t> {
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public:
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std::string toJson() {
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Document json;
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// allocator for memory management
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Document::AllocatorType& allocator = json.GetAllocator();
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// define the document as an object rather than an array
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json.SetArray();
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if( WALLET_VECTOR_LENGTH != this->size())
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return("{}");
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// iterator we are going to be using the whole time
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std::vector<uint8_t>::iterator it = this->begin();
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// Double check the Wallet length
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if( WALLET_LENGTH != *it )
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return("{}");
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it++;
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// Double check the Wallet element length
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if( WALLET_POINT_LENGTH != *it )
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return("{}");
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it++;
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for( int i = 0; i< WALLET_LENGTH; i++)
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{
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Value point(kArrayType);
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for( int j = 0; j< WALLET_POINT_LENGTH; j++)
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{
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point.PushBack(*it, allocator);
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it++;
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}
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json.PushBack(point, allocator);
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}
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StringBuffer sb;
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Writer<StringBuffer> writer(sb);
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json.Accept(writer);
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return sb.GetString();
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}
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bool fromJson(std::string s) {
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Document json;
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json.Parse(s.c_str());
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eraseAll();
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// // Make sure we arent going to get an error when indexing into the JSON
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if(!json.IsArray())
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return false;
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if(!(json.Size() == SizeType(WALLET_LENGTH)))
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return false;
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this->push_back(WALLET_LENGTH);
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this->push_back(WALLET_POINT_LENGTH);
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for( int i =0; i< WALLET_LENGTH; i++)
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{
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const Value& point = json[i];
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if(!point.IsArray())
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return false;
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if(!(point.Size() == SizeType(WALLET_POINT_LENGTH)))
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cleanupAndFalse();
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for(SizeType j = 0; j < point.Size(); j++)
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this->push_back(point[j].GetUint64());
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}
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// Make sure the final length is good
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if(!(this->size() == WALLET_VECTOR_LENGTH))
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return cleanupAndFalse();
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return true;
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}
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// Stolen from https://github.com/zeutro/openabe/blob/master/src/include/openabe/utils/zbytestring.h
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bool fromHex(std::string s) {
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if((s.find_first_not_of(HEX_CHARS) != std::string::npos) ||
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(s.size() % 2 != 0)) {
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return false;
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}
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if ( s.length() != WALLET_HEX_STRING_LENGTH)
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return false;
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std::string hex_str;
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std::stringstream ss;
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int tmp;
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this->clear();
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for (size_t i = 0; i < s.size(); i += 2) {
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hex_str = s[i];
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hex_str += s[i+1];
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ss << hex_str;
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ss >> std::hex >> tmp;
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this->push_back(tmp & 0xFF);
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ss.clear();
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}
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return true;
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}
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std::string toHex() const {
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std::stringstream ss;
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int hex_len = 2;
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char hex[hex_len+1];
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std::memset(hex, 0, hex_len+1);
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for (std::vector<uint8_t>::const_iterator it = this->begin();
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it != this->end(); ++it) {
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sprintf(hex, "%02X", *it);
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ss << hex;
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}
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return ss.str();
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}
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std::string toLowerHex() const {
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std::stringstream ss;
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int hex_len = 2;
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char hex[hex_len+1];
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std::memset(hex, 0, hex_len+1);
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for (std::vector<uint8_t>::const_iterator it = this->begin() ; it != this->end(); ++it) {
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sprintf(hex, "%02x", *it);
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ss << hex;
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}
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return ss.str();
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}
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void eraseAll() {
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this->erase(this->begin(), this->end());
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}
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private:
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bool cleanupAndFalse() {
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eraseAll();
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return false;
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}
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};
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#endif |