#include <iostream>
#include <fstream>
#include <cstdlib>
#include <cstdio>
#include <sstream>
#include <cstring>
#include <memory>
#include <limits>
#include <stdexcept>
#include <array>
#include <vector>
#include <string>
#include <algorithm>
#include <iterator>
#include <sys/stat.h>
#include <ctime>
#include <unistd.h>
#include "tcoin_defs.cpp"
/* OLD VALUES */
/*
#define TCOIN_PATH "/home/login/tcoin"
#define TCOIN_MSG_PATH "/home/login/tcoin/messages/"
#define TCOIN_SALT_PATH "/home/login/tcoin/salts/"
#define TCOIN_PASS_PATH "/home/login/tcoin/passwords/"
#define TCOIN_PROG_ACT_PATH "/home/login/tcoin/program_accounting/"
#define PROG_ACT_W_SLASH "program_accounting/"
#define PCOIN_KEY_PATH_W_SLASH "/home/login/bin/pcoin_keys/"
#define TCOIN_CODEZ_PATH "/home/login/bin/tcoin_codez"
#define TCOIN_BIN_PATH_W_SPACE "/home/login/bin/tcoin "
#define TCOIN_PATH_W_SLASH "/home/login/tcoin/"
#define TCOIN_SCRYPT_PATH "/home/login/bin/scrypt"
*/
#define LS_HOME_CMD "/bin/ls /home"
#define BIN_ECHO_CMD "/bin/echo $$"
#ifndef KROWBAR_OFF
#define KROWBAR_SCORE_PATH "/home/krowbar/Code/irc/data/tildescores.txt"
#endif
#if !defined(TILDEINSTITUTE) && !defined(TILDEGURU)
#define WHOAMI_PATH "/usr/bin/whoami"
#else
#define WHOAMI_PATH "/usr/bin/getent passwd $(/usr/bin/id -ru) | /usr/bin/cut -d: -f1"
#endif
#ifndef DA_OFF
#define TROIDO_DACOINS_CMD "cd /home/troido/daily_adventure/client/ && /home/troido/daily_adventure/client/daclient printinfo 2>&1 | /bin/grep -oP '(?<=\"Coins\", )[[:digit:]]+'"
#endif
#ifndef MINERCOIN_OFF
#define MINERCOIN_CMD_PRE_USERNAME "/bin/grep -oP '(?<=\"~"
#define MINERCOIN_CMD_POST_USERNAME "\": )[[:digit:]]+' /home/minerobber/Code/minerbot/minercoin.json"
#endif
#define USERNAME_LENGTH_LIMIT 25
#define TCOIN_MSG_LENGTH_LIMIT 280
#define ERR_NO_INIT 4
#define ERR_ALREADY_ON 40
#define ERR_NO_PWD_FILE 10
#define ERR_WRONG_PWD 20
#define ERR_WRONG_PWD2 30
#define ERR_ALREADY_OFF 20
#define ERR_DAMAGED_SALT_FILE 40
#define ERR_2_SALT_FILES 60
#define ERR_NOT_LOGGED_IN 5
#define ERR_MAIN_SEND_TOO_FEW_ARGS 6
#define ERR_MAIN_SEND_TOO_MANY_ARGS 7
#define ERR_MAIN_SEND_TOO_MANY_ARGS_MSG 104
#define ERR_MAIN_MSG_TOO_LONG 19
#define ERR_SILENTSEND 2
#define ERR_UNKNOWN_ARG 3
#define ERR_TCOIN_TO_SELF 5
#define ERR_RECEIVER_BLOCKED 4
#define ERR_NEGATIVE_SEND_AMOUNT 2
#define ERR_INSUFFICIENT_FUNDS 3
#define ERR_RECEIVER_NOT_FOUND 1
#define ERR_GET_FILE_VALUE_COULDNT_OPEN_BASEFILE 1
#define ERR_ADD_FILE_VALUE_COULDNT_OPEN_BASEFILE 1
#define ERR_ADD_FILE_VALUE_FATAL 999
#define ERR_GET_FILE_VALUE_COULDNT_OPEN_BASEFILE 1
#define ERR_ADD_FILE_VALUE_COULDNT_OPEN_BASEFILE 1
#define ERR_SEND_MESSAGE_RECEIVER_MSG_FILE_UNABLE_TO_BE_UPDATED_FATAL 101
#define ERR_SEND_MESSAGE_PROGRAM_RECEIVER_MSG_FILE_UNABLE_TO_BE_UPDATED_FATAL 103
#define ERR_SEND_MESSAGE_SENDER_MSG_FILE_UNABLE_TO_BE_UPDATED_FATAL 102
void exit_program(const int error_number)
{
// Cleanup to do before exiting the program
//TODO: Print the actual error code to stderr
// Finally, we can exit
std::exit(error_number);
}
//custom function to convert ("abcd.de") to ("abcde")
long long int strtol100(const char* amount_str)
{
long long int result = 0;
int multiplier = 1;
int i=0;
if(amount_str[i]=='-')
{
multiplier = -1;
++i;
}
else if(amount_str[i]=='+')
{
++i;
}
else if(amount_str[i]=='\0') //empty string
{
return (long long int)(0);
}
//before the decimal point
while(amount_str[i]!='.')
{
if(amount_str[i]>='0' && amount_str[i]<='9')
{
result = result*10 + ((long long int)(amount_str[i]) - (long long int)('0'));
}
else if(amount_str[i]=='\0') //e.g. 500
{
result *= (multiplier*100); //multiplied by 100 to get centitildecoins
return result;
}
else //error
{
return (long long int)(0);
}
++i;
}
//at decimal point
++i;
//after decimal point (i.e., tenth's place)
if(amount_str[i]>='0' && amount_str[i]<='9')
result = result*100 + ((long long int)(amount_str[i]) - (long long int)('0'))*10;
else if(amount_str[i]=='\0') //e.g. "500."
{
result *= (multiplier*100); //multiplied by 100 to get centitildecoins
return result;
}
else //error
{
return (long long int)(0);
}
//before hundredth's place
++i;
//at hundredth's place
if(amount_str[i]>='0' && amount_str[i]<='9')
result += ((long long int)(amount_str[i]) - (long long int)('0'));
else if(amount_str[i]=='\0') //e.g. "500.3"
{
result *= multiplier;
return result;
}
else //error
{
return (long long int)(0);
}
result *= multiplier;
return result;
}
//custom function to convert integer string to long long int fast
long long int strtol_fast(const char* amount_str)
{
long long int result = 0;
int multiplier = 1;
int i=0;
if(amount_str[i]=='-')
{
multiplier = -1;
++i;
}
else if(amount_str[i]=='+')
{
++i;
}
else if(amount_str[i]=='\0') //empty string
{
return (long long int)(0);
}
//before the end of the string
while(amount_str[i]>='0' && amount_str[i]<='9')
{
result = result*10 + ((long long int)(amount_str[i]) - (long long int)('0'));
++i;
}
result *= multiplier;
return result;
}
//string constant time compare (only checks for equality (return 0 if equal))
int strctcmp(const char*a, const char*b)
{
if(!(*a) || !(*b)) //*a or *b are empty (NULL characters)
return 1;
int r = 0;
for (; *a && *b; ++a, ++b)
{
r |= *a != *b;
}
return r;
}
std::string exec(const char* cmd) {
std::array<char, 128> buffer;
std::string result;
std::shared_ptr<FILE> pipe(popen(cmd, "r"), pclose);
if (!pipe) throw std::runtime_error("popen() failed!");
while (!feof(pipe.get())) {
if (fgets(buffer.data(), 128, pipe.get()) != nullptr)
result += buffer.data();
}
return result;
}
long long int get_file_value(const char* file_name)
{
char* file_path = new char[strlen(file_name)+sizeof(TCOIN_PATH_W_SLASH)+4];
std::strcpy(file_path, TCOIN_PATH_W_SLASH);
std::strcat(file_path, file_name);
std::strcat(file_path, ".txt");
std::ifstream file(file_path);
if(!file)
{
if(!strcmp(file_name, "base/base"))
{
std::cerr << "\nError! Could not open file at " << file_path << "!\n\n";
exit_program(ERR_GET_FILE_VALUE_COULDNT_OPEN_BASEFILE);
}
else
{
std::cerr << "\nError! Could not open file at " << file_path << "! Assuming its internal content is \"0\\n\".\n\n";
return (long long int)(0);
}
}
std::ostringstream ss;
ss << file.rdbuf();
file.close();
delete[] file_path;
return strtol_fast(ss.str().c_str());
}
int add_file_value(const char* file_name, const long long int &value_to_add, const long long int &base_amount)
{
char* file_path = new char[strlen(file_name)+sizeof(TCOIN_PATH_W_SLASH)+4];
char* temp_file_path = new char[strlen(file_name)+sizeof(TCOIN_PATH_W_SLASH)+8];
std::strcpy(file_path, TCOIN_PATH_W_SLASH);
std::strcat(file_path, file_name);
std::strcpy(temp_file_path, file_path);
std::strcat(file_path, ".txt");
std::strcat(temp_file_path, "_tmp");
std::strcat(temp_file_path, ".txt");
std::ifstream file(file_path);
if(!file)
{
if(!strcmp(file_name, "base/base"))
{
std::cerr << "\nError! Could not open file at " << file_path << "!\n\n";
file.close();
delete[] file_path;
delete[] temp_file_path;
exit_program(ERR_ADD_FILE_VALUE_COULDNT_OPEN_BASEFILE);
}
}
std::ostringstream ss;
ss << file.rdbuf();
long long int old_value = strtol_fast(ss.str().c_str());
//sufficient funds check
if(value_to_add < 0 && (old_value + base_amount + value_to_add < 0))
{
file.close();
delete[] file_path;
delete[] temp_file_path;
return 1;
}
long long int new_value = old_value + value_to_add;
// Writing new value to file
file.close();
std::ofstream file2(temp_file_path);
file2 << new_value << "\n";
file2.close();
chmod(temp_file_path, (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
if(!file2) //error
{
std::cerr << "Fatal error " << ERR_ADD_FILE_VALUE_FATAL << ": the file \"" << file_name << "\" was unable to be updated. Please contact login@tilde.town (town-only) or login@tilde.team (internet-wide to report this error (because it requires manual recovery).";
exit_program(ERR_ADD_FILE_VALUE_FATAL);
}
else
{
std::remove(file_path);
while(1)
{
if(!std::rename(temp_file_path, file_path))
{
chmod(file_path, (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
break;
}
}
}
delete[] file_path;
delete[] temp_file_path;
return 0;
}
std::string get_username()
{
static std::string username;
if(username.empty())
{
username = exec(WHOAMI_PATH);
username.pop_back(); //to get rid of newline at the end
}
return username;
}
std::string formatted_amount(long long int const& amount, char const* appended_chars_default = "", char const* appended_chars_singular = "")
{
std::ostringstream ss;
bool is_non_negative = amount >= 0 ? true : false;
if(!is_non_negative) //i.e., is negative
ss << "-";
if(((is_non_negative*2-1)*amount) % 100 == 0)
ss << (is_non_negative*2-1)*amount/100;
else if((is_non_negative*2-1)*amount % 100 < 10)
ss << (is_non_negative*2-1)*amount/100 << ".0" << (is_non_negative*2-1)*amount % 100;
else
ss << (is_non_negative*2-1)*amount/100 << "." << (is_non_negative*2-1)*amount % 100;
if(((is_non_negative*2-1)*amount == 100) && strcmp(appended_chars_singular, ""))
ss << appended_chars_singular;
else
ss << appended_chars_default;
std::string formatted_string(ss.str());
return formatted_string;
}
void cout_formatted_amount(long long int const& amount, char const* appended_chars_default = "", char const* appended_chars_singular = "", bool negative_with_parentheses = false)
{
bool amount_is_negative = (amount < 0);
if(negative_with_parentheses && amount_is_negative) std::cout << "(";
std::cout << formatted_amount(amount, appended_chars_default, appended_chars_singular);
if(negative_with_parentheses && amount_is_negative) std::cout << ")";
}
long long int base_amount;
long long int user_amount;
long long int krowbar_amount; //krowbar's tilde game amount
long long int da_amount; //troido's daily adventure amount
long long int minercoin_amount; //minerbot's minercoin game amount
void show_breakdown(const long long int &amount0 = 0, char const* amount0_source = "", const long long int &amount1 = 0, char const* amount1_source = "", const long long int &amount2 = 0, char const* amount2_source = "", const long long int &amount3 = 0, char const* amount3_source = "", const long long int &amount4 = 0, char const* amount4_source = "")
{
bool a0 = (amount0 != 0 && strcmp(amount0_source, ""));
bool a1 = (amount1 != 0 && strcmp(amount1_source, ""));
bool a2 = (amount2 != 0 && strcmp(amount2_source, ""));
bool a3 = (amount3 != 0 && strcmp(amount3_source, ""));
bool a4 = (amount4 != 0 && strcmp(amount4_source, ""));
if(a0 || a1 || a2 || a3 || a4)
{
std::cout << "Breakdown: ";
if(a0)
{
cout_formatted_amount(amount0, "", "", true);
std::cout << " [" << amount0_source << "]";
if(a1 || a2 || a3 || a4)
{
std::cout << " + ";
}
}
if(a1)
{
cout_formatted_amount(amount1, "", "", true);
std::cout << " [" << amount1_source << "]";
if(a2 || a3 || a4)
{
std::cout << " + ";
}
}
if(a2)
{
cout_formatted_amount(amount2, "", "", true);
std::cout << " [" << amount2_source << "]";
if(a3 || a4)
{
std::cout << " + ";
}
}
if(a3)
{
cout_formatted_amount(amount3, "", "", true);
std::cout << " [" << amount3_source << "]";
if(a4)
{
std::cout << " + ";
}
}
if(a4)
{
cout_formatted_amount(amount4, "", "", true);
std::cout << " [" << amount4_source << "]";
}
std::cout << "\n";
}
}
void show_balance(char const* username, const long long int &amount, const long long int &amount0 = 0, char const* amount0_source = "", const long long int &amount1 = 0, char const* amount1_source = "", const long long int &amount2 = 0, char const* amount2_source = "", const long long int &amount3 = 0, char const* amount3_source = "", const long long int &amount4 = 0, char const* amount4_source = "")
{
std::cout << username << ", you have ";
cout_formatted_amount(amount, " tildecoins", " tildecoin");
std::cout << " to your name.\n\n";
show_breakdown(amount0, amount0_source, amount1, amount1_source, amount2, amount2_source, amount3, amount3_source, amount4, amount4_source);
std::cout << "\nThe command to send tildecoins to other users is `tcoin send <username> <amount>` or `tcoin -s <username> <amount>`.";
std::cout << "\nThe command to log out of tildecoin is `tcoin off`.\n\n";
}
bool file_is_empty(std::ifstream& pFile)
{
return pFile.peek() == std::ifstream::traits_type::eof();
}
bool files_are_same(const char* file_path1, const char* file_path2)
{
std::ifstream fin1(file_path1);
if(!fin1)
return false;
std::ifstream fin2(file_path2);
if(!fin2)
return false;
char c1;
char c2;
while(fin1.get(c1) && fin2.get(c2))
{
if(c2 != c1)
return false;
}
fin2.get(c2); //when fin1.get(c1) fails, fin2.get(c2) is not executed because of short-circuited boolean operators. This line compensates for that.
if(fin1 || fin2) //one of the files must still be valid while both files are not simulatenously valid (after the while loop), which means the files are of different sizes
return false;
return true;
//Because of (!fin1 && fin2) || (fin1 && !fin2), if any one
//file is larger than the other, the files are deemed not the same.
//If the last characters of the two files have not been read, then
//both "fin1" and "fin2" will return true in the next iteration, and
//in the current iteration, c1 and c2 have valid values that can be compared.
//If the last characters of the two files were read, then "fin1" and "fin2"
//will still return true until the next time fin1.get() or fin2.get() is called.
//c1 and c2 still carry valid values (namely, the last characters of fin1 and fin2)
//which are compared. At the next iteration, both fin1 and fin2 fail and the loop exits.
//This means all c1's and c2's were equal in the iterations before. Thus, the two files are
//deemed the same.
}
void clear_messages(const char* username)
{
std::string messages_path = std::string(TCOIN_MSG_PATH) + std::string(username) + std::string("_messages.txt");
long long int max_long_long_int = std::numeric_limits<long long int>::max();
//we don't actually delete, but just generate a backup ;)
for(long long int i = 1; i <= max_long_long_int; ++i)
{
std::string messages_backup_path = std::string(TCOIN_MSG_PATH) + std::string(username) + std::string("_messages") + std::to_string(i) + std::string(".txt");
std::ifstream fin(messages_backup_path.c_str());
if(!fin || file_is_empty(fin)) //if file did not open or was empty, i.e., is available as a file name to backup (backups are incrementally numbered)
{
fin.close();
rename(messages_path.c_str(), messages_backup_path.c_str());
chmod(messages_backup_path.c_str(), (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
break;
}
else
fin.close();
}
std::ofstream fout(messages_path.c_str(), std::fstream::trunc);
fout << "\n";
fout.close();
chmod(messages_path.c_str(), (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
}
void show_messages(const char* username)
{
std::string messages_path = std::string(TCOIN_MSG_PATH) + std::string(username) + std::string("_messages.txt");
std::ifstream fin(messages_path.c_str());
std::cout << "Messages:\n";
char ch;
bool first_char_is_newline = false;
bool reached_eof = false;
for(int i=0; i < 2; ++i)
{
if(ch = fin.get())
{
if(ch == std::istream::traits_type::eof()) //https://stackoverflow.com/questions/4533063/how-does-ifstreams-eof-work
{
if(first_char_is_newline && i==1)
{
reached_eof = true;
std::cout << "No messages found.\n";
}
break;
}
else
{
if(i==0 && ch=='\n')
{
first_char_is_newline = true;
}
std::cout << ch;
}
}
}
if(!reached_eof)
{
std::cout << fin.rdbuf();
}
//removing eofbit
fin.clear();
//moving back two places from the end to read the last two characters
fin.seekg(-2, std::ios::end);
char chs[2]; //chs = characters
chs[0] = fin.get();
chs[1] = fin.get();
fin.get(); //to set eofbit again because I like it to be just the way it was before removing the eofbit
if(chs[0]!='\n' && chs[1]=='\n') //if only one newline at the end of the file
std::cout << "\n"; //print another one
fin.close();
}
void show_messages_tail(const char* username, int lineCount)
{
size_t const granularity = 100 * lineCount;
std::string messages_path = std::string(TCOIN_MSG_PATH) + std::string(username) + std::string("_messages.txt");
std::ifstream source(messages_path.c_str(), std::ios_base::binary);
source.seekg(0, std::ios_base::end);
size_t size = static_cast<size_t>(source.tellg());
std::vector<char> buffer;
int newlineCount = 0; //pseudo newline count
while(source && buffer.size() != size && newlineCount <= lineCount)
{
buffer.resize(std::min(buffer.size() + granularity, size));
source.seekg(-static_cast<std::streamoff>(buffer.size()), std::ios_base::end);
source.read(buffer.data(), buffer.size());
newlineCount = std::count(buffer.begin(), buffer.end(), '\n');
for(std::vector<char>::size_type i = 0; i < (buffer.size()-1); ++i)
if(buffer[i] == '\n' && (buffer[i+1] == '\n' || buffer[i+1] == ' '))
{
newlineCount--; // An entry as follows: "<stuff>\n \_message>\n\n" must be treated as a single newline-ended line (and thus count 1 newline (not 3))
++i; //three consecutive newlines should not be "two pairs" of newlines
}
}
std::vector<char>::iterator start = buffer.begin();
while(newlineCount > lineCount)
{
start = std::find(start, buffer.end(), '\n') + 1;
if(*start == ' ' || *start == '\n')
continue; //we're counting cutting off a '\n ' (and '\n\n') as zero (and one) newline cut off because "<stuff>\n \_message>\n\n" is one message
--newlineCount;
}
std::cout << "Last " << lineCount << " Messages:\n";
std::vector<char>::iterator end = remove(start, buffer.end(), '\r');
if((start == (end-1)) && (*(start) == '\n')) //there is only one character, and it is a newline (i.e.. no messages)
std::cout << "\nNo messages found.\n\n";
else
{
if(*(start) != '\n') //if it starts with a newline, don't put another one
std::cout << "\n";
std::cout << std::string(start, end);
if(*(end-2) != '\n' && *(end-1) == '\n') //if it ends with two newlines, don't put another one
std::cout << "\n";
}
}
bool program_exists(const char* username)
{
char *program_key_path = new char[strlen(username) + sizeof(PCOIN_KEY_PATH_W_SLASH) + 4]; //sizeof counts NULL char at the end too
std::strcpy(program_key_path, PCOIN_KEY_PATH_W_SLASH);
std::strcat(program_key_path, username);
std::strcat(program_key_path, ".txt");
std::ifstream fin(program_key_path);
bool return_value = false;
if(!fin) //file doesn't exist
{
fin.close();
delete[] program_key_path;
return_value = false; //program account not found
}
else
{
fin.close();
delete[] program_key_path;
return_value = true; //program account found
}
return return_value;
}
bool username_exists(const char* username)
{
const static std::string all_usernames = exec(LS_HOME_CMD);
std::istringstream iss(all_usernames);
static std::vector<std::string> usernames{std::istream_iterator<std::string>{iss}, std::istream_iterator<std::string>{}};
if(std::find(usernames.begin(), usernames.end(), username) != usernames.end())
{
return true;
}
//program usernames check
return program_exists(username);
}
bool user_has_initialised(const char* username)
{
bool return_value = true; //we assume the user has initialised and check for signs of that not being the case
char *balance_file_path = new char[strlen(username) + sizeof(TCOIN_PATH_W_SLASH) + 4]; //sizeof counts NULL char at the end too
std::strcpy(balance_file_path, TCOIN_PATH_W_SLASH);
std::strcat(balance_file_path, username);
std::strcat(balance_file_path, ".txt");
char *messages_file_path = new char[strlen(username) + sizeof(TCOIN_MSG_PATH) + 13]; //sizeof counts NULL char at the end too
std::strcpy(messages_file_path, TCOIN_MSG_PATH);
std::strcat(messages_file_path, username);
std::strcat(messages_file_path, "_messages.txt");
char *password_file_path = new char[strlen(username) + sizeof(TCOIN_PASS_PATH) + 13]; //sizeof counts NULL char at the end too
std::strcpy(password_file_path, TCOIN_PASS_PATH);
std::strcat(password_file_path, username);
std::strcat(password_file_path, "_password.txt");
char *salt_file_path = new char[strlen(username) + sizeof(TCOIN_SALT_PATH) + 9]; //sizeof counts NULL char at the end too
std::strcpy(salt_file_path, TCOIN_SALT_PATH);
std::strcat(salt_file_path, username);
std::strcat(salt_file_path, "_salt.txt");
char *salt_logged_in_file_path = new char[strlen(username) + sizeof(TCOIN_SALT_PATH) + 19]; //sizeof counts NULL char at the end too
std::strcpy(salt_logged_in_file_path, TCOIN_SALT_PATH);
std::strcat(salt_logged_in_file_path, username);
std::strcat(salt_logged_in_file_path, "_salt_logged_in.txt");
std::ifstream fin1(balance_file_path);
std::ifstream fin2(messages_file_path);
std::ifstream fin3(password_file_path);
std::ifstream fin4(salt_file_path);
std::ifstream fin5(salt_logged_in_file_path);
if(!fin1 || !fin2 || !fin3 || file_is_empty(fin3) || (!fin4 && !fin5) || (fin4 && file_is_empty(fin4)) || (fin5 && file_is_empty(fin5)))
return_value = false; //user has not initialised completely
fin1.close();
fin2.close();
fin3.close();
fin4.close();
fin5.close();
delete[] balance_file_path;
delete[] messages_file_path;
delete[] password_file_path;
delete[] salt_file_path;
delete[] salt_logged_in_file_path;
return return_value;
}
int log_off(const char* username)
{
std::string salt_logged_in_file = std::string(TCOIN_SALT_PATH) + std::string(username) + std::string("_salt_logged_in.txt");
std::string salt_file = std::string(TCOIN_SALT_PATH) + std::string(username) + std::string("_salt.txt");
std::ifstream fin(salt_logged_in_file.c_str());
if(!fin) //user is not currently logged in
{
std::cout << "\nSorry, you're already logged out. Thanks for being extra careful about being logged out before running untrusted programs (if you were going to do that).\n\n";
return ERR_ALREADY_OFF;
}
else //user is logged in
{
if(file_is_empty(fin)) //user is logged in but salt_logged_in_file is empty
{
remove(salt_logged_in_file.c_str());
remove(salt_file.c_str());
std::cout << "\nSorry, your salt file is damaged. You will have to run `tcoin init` and create a new passphrase.\n\n";
return ERR_DAMAGED_SALT_FILE;
}
else //user is logged in and salt_logged_in_file is not empty
{
fin.close();
std::ifstream fin2(salt_file.c_str());
if(!fin2 || (fin2 && file_is_empty(fin2))) //salt_file doesn't exist or is empty but salt_logged_in_file does
{
if(fin2 && file_is_empty(fin2))
remove(salt_file.c_str());
fin2.close();
rename(salt_logged_in_file.c_str(), salt_file.c_str());
std::cout << "\nYou have successfully logged out of tildecoin. Have a wonderful day!\n\n";
}
else //salt_file exists and is non-empty, and salt_file_logged_in also exists (!) and is non-empty
{
fin2.close();
std::cout << "\nSorry, there's something seriously wrong with your salt files. You'll have to run `tcoin init` and create a new passphrase.\n\n";
return ERR_2_SALT_FILES;
}
}
}
return 0;
}
bool is_logged_on(const char* username)
{
std::string salt_logged_in_file = std::string(TCOIN_SALT_PATH) + std::string(username) + std::string("_salt_logged_in.txt");
std::string salt_file = std::string(TCOIN_SALT_PATH) + std::string(username) + std::string("_salt.txt");
std::ifstream fin(salt_logged_in_file.c_str());
if(!fin)
return false;
else if(file_is_empty(fin))
{
fin.close();
remove(salt_logged_in_file.c_str());
remove(salt_file.c_str());
std::cout << "\n\nYour salt logged in file is empty. You'll have to run `tcoin init` and create a new passphrase.\n\n";
return false;
}
//control only reaches here if (fin && !file_is_empty(fin)), so the user is indeed logged in
return true;
}
int log_on(const char* username)
{
if(is_logged_on(username))
{
std::cout << "\nYou're already logged in. Please type `tcoin` to see your messages and balance.\n\n";
return ERR_ALREADY_ON;
}
std::string salt_file = std::string(TCOIN_SALT_PATH) + std::string(username) + std::string("_salt.txt");
std::string decrypted_password_file = std::string(TCOIN_PASS_PATH) + std::string(username) + std::string("_decrypted_password.txt");
std::string password_file = std::string(TCOIN_PASS_PATH) + std::string(username) + std::string("_password.txt");
std::ifstream fin(password_file.c_str());
if(!fin || (fin && file_is_empty(fin)))
{
std::cout << "\nSorry, your password file could not be opened. You will have to create a new passphrase by running `tcoin init`.\n\n";
return ERR_NO_PWD_FILE;
}
else
{
fin.close();
std::ifstream codefin(TCOIN_CODEZ_PATH);
char code1[513], code2[513];
codefin >> code1;
codefin >> code2;
codefin.close();
exec((std::string(TCOIN_BIN_PATH_W_SPACE) + std::string(code2)).c_str());
fin.open(decrypted_password_file.c_str());
if(!fin || (fin && file_is_empty(fin)))
{
if(fin && file_is_empty(fin))
remove(decrypted_password_file.c_str());
fin.close();
std::cout << "\nSorry, the passphrase you entered could not decrypt the encrypted password file. You are not logged on. Please run `tcoin on` to try again.\n\n";
return ERR_WRONG_PWD;
}
else
{
if(files_are_same(salt_file.c_str(), decrypted_password_file.c_str()))
{
std::string salt_logged_in_file = std::string(TCOIN_SALT_PATH) + std::string(username) + std::string("_salt_logged_in.txt");
rename(salt_file.c_str(), salt_logged_in_file.c_str());
remove(decrypted_password_file.c_str());
std::cout << "\nYou have now successfully logged on to tildecoin (please run `tcoin` to check your balance and messages). Please be aware that any programs you run now can siphon funds from your account without your knowing until it's too late. Please run `tcoin off` before running any untrusted programs.\n\n";
}
else
{
remove(decrypted_password_file.c_str());
fin.close();
std::cout << "\nSorry, the decrypted password file did not match the salt file. You are not logged on. Please run `tcoin on` to try again.\n\n";
return ERR_WRONG_PWD2;
}
}
}
return 0;
}
int initialise_user(const char* username, const long long int &base_amount)
{
std::string balance_file = std::string(TCOIN_PATH_W_SLASH) + std::string(username) + std::string(".txt");
std::string messages_file = std::string(TCOIN_MSG_PATH) + std::string(username) + std::string("_messages.txt");
std::string password_file = std::string(TCOIN_PASS_PATH) + std::string(username) + std::string("_password.txt");
std::string salt_file = std::string(TCOIN_SALT_PATH) + std::string(username) + std::string("_salt.txt");
std::string salt_logged_in_file = std::string(TCOIN_SALT_PATH) + std::string(username) + std::string("_salt_logged_in.txt");
std::ifstream fin(balance_file.c_str());
bool flag_balance = false, flag_messages = false, flag_password_and_salt = false;
if(!fin)
{
std::ofstream fout(balance_file.c_str(), std::fstream::trunc);
fout << "0\n";
fout.close();
chmod(balance_file.c_str(), (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
flag_balance = true;
}
fin.close();
fin.open(messages_file.c_str());
if(!fin)
{
fin.close();
std::ofstream fout(messages_file.c_str(), std::fstream::trunc);
fout << "\n";
fout.close();
chmod(messages_file.c_str(), (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
flag_messages = true;
}
fin.close();
fin.open(salt_file.c_str());
std::ifstream fin2(password_file.c_str());
std::ifstream fin3(salt_logged_in_file.c_str());
if((!fin && !fin3) || !fin2 || (fin && file_is_empty(fin)) || (fin3 && file_is_empty(fin3)) || file_is_empty(fin2)) //if salt or password file is missing or empty, we'd have to set up a new salt and password (i.e., salt file encrypted with passphrase)
{
fin.close();
fin2.close();
fin3.close();
remove(salt_file.c_str());
remove(salt_logged_in_file.c_str());
remove(password_file.c_str());
std::ofstream fout(salt_file.c_str(), std::fstream::trunc);
const long long int rand_max_length = strlen(std::to_string(RAND_MAX).c_str());
{
for(int i=0; i<16;++i)
{
fout.width(rand_max_length);
fout.fill('0');
fout << rand();
}
}
fout << "\n";
fout.close();
chmod(salt_file.c_str(), (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
std::cout << "\nYour salt and/or password file(s) are missing. A new salt and password file will be created. Please enter your desired passphrase and re-enter to confirm the same below. You will need to enter it to log onto tildecoin. If you ^C before confirming the passphrase, you'll have created an empty password file and would have to run `tcoin init` again.\n\n";
std::ifstream codefin(TCOIN_CODEZ_PATH);
char code1[513], code2[513];
codefin >> code1;
codefin.close();
exec((std::string(TCOIN_BIN_PATH_W_SPACE) + std::string(code1)).c_str());
fin.open(password_file.c_str());
if(!fin || (fin && file_is_empty(fin)))
{
if(file_is_empty(fin))
chmod(password_file.c_str(), (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
fin.close();
std::cout << "\nSomething went wrong in the password-file generation process. Your password file is now empty. You will have to run `tcoin init` again and choose a new passphrase.\n\n";
return 1;
}
else
{
chmod(password_file.c_str(), (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
fin.close();
}
flag_password_and_salt=true;
}
fin.close();
fin2.close();
fin3.close();
if(flag_balance==true)
{
std::cout << "\nWelcome to tildecoin. ";
cout_formatted_amount(base_amount, " tildecoins have been added to your account.\n");
if(flag_messages==false)
std::cout << "\nPlease execute `tcoin --help` for help or just `tcoin` for a status update.\n";
}
if(flag_messages==true)
{
std::cout << "\nYour tildecoin account is ready to send and receive messages!";
std::cout << "\nPlease execute `tcoin --help` for help or just `tcoin` for a status update.\n";
}
if(flag_password_and_salt==true)
{
std::cout << "\nThe password-file generation process was completed successfully. Please run `tcoin on` to log on and `tcoin off` to log off. While logged on, be aware that any other programs you run can siphon funds from your account without your knowing until it's too late. Thus, please run `tcoin off` before running any untrusted programs.\n";
}
if(!flag_balance && !flag_messages && !flag_password_and_salt) //the account was initialised despite being already initialised and having all the required files intact.
std::cout << "\nYou took quite the chance initialising again. What if it nuked your balance, messages and passphrase?\n";
std::cout << '\n';
return 0;
}
int send_message(const char* sender_username, const char* receiver_username, const char* message, const long long int &amount_sent, const char* option)
{
std::string random_string = std::to_string(rand());
char *receiver_path = new char[strlen(receiver_username) + sizeof(TCOIN_MSG_PATH) + 13]; //sizeof() includes '\0'
char *temp_receiver_path = new char[strlen(receiver_username) + strlen(random_string.c_str()) + sizeof(TCOIN_MSG_PATH) + 13];
std::strcpy(receiver_path, TCOIN_MSG_PATH); //length = 27
std::strcat(receiver_path, receiver_username);
std::strcat(receiver_path, "_messages.txt"); //length = 13
std::strcpy(temp_receiver_path, TCOIN_MSG_PATH);
std::strcat(temp_receiver_path, receiver_username);
std::strcat(temp_receiver_path, random_string.c_str());
std::strcat(temp_receiver_path, "_messages.txt");
//create receiver's message file if none exists
//the message will be included in the receiver's
//account when she/he initialises her/his account
//at a later time
char *receiver_salt_path = new char[strlen(receiver_username) + sizeof(TCOIN_SALT_PATH) + 9]; //sizeof() includes '\0'
char *receiver_salt_logged_in_path = new char[strlen(receiver_username) + sizeof(TCOIN_SALT_PATH) + 19];
std::strcpy(receiver_salt_path, TCOIN_SALT_PATH);
std::strcat(receiver_salt_path, receiver_username);
std::strcpy(receiver_salt_logged_in_path, receiver_salt_path);
std::strcat(receiver_salt_path, "_salt.txt"); //length = 9
std::strcat(receiver_salt_logged_in_path, "_salt_logged_in.txt"); //length = 19
std::ifstream fin(receiver_path);
std::ifstream fin2(receiver_salt_path);
std::ifstream fin3(receiver_salt_logged_in_path);
if((!fin || file_is_empty(fin)) && ((!program_exists(receiver_username)) || ((!fin2 || file_is_empty(fin2)) && (!fin3 || file_is_empty(fin3)))))
{
fin.close();
std::ofstream fout(receiver_path, std::fstream::trunc);
fout << "\n";
fout.close();
}
else
fin.close();
fin2.close();
fin3.close();
chmod(receiver_path, (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
delete[] receiver_salt_path;
delete[] receiver_salt_logged_in_path;
while(1)
{
if(!std::rename(receiver_path, temp_receiver_path))
{
char *really_temp_receiver_path = new char[strlen(temp_receiver_path) + 5]; //4 + 1 for '\0'
std::strcpy(really_temp_receiver_path, temp_receiver_path);
std::strcat(really_temp_receiver_path, "_tmp"); //length = 4
std::ifstream fin(temp_receiver_path);
std::ofstream fout(really_temp_receiver_path);
if(!file_is_empty(fin))
fout << fin.rdbuf();
fin.close();
time_t now = std::time(NULL);
char dt[26];
#ifndef TILDEINSTITUTE
std::strftime(dt, 26, "%a %b %_d %T %Y", std::gmtime(&now));
#else
std::strftime(dt, 26, "%a %b %e %T %Y", std::gmtime(&now));
#endif
char sender_formatted_string[26];
char sender_arrow_formatted_string[47];
char sender_arrow_string[47];
char receiver_formatted_string[26];
std::snprintf(sender_formatted_string, 26, "%25s", sender_username);
std::snprintf(receiver_formatted_string, 26, "%-25s", receiver_username);
int sender_username_length = std::strlen(sender_username);
int number_of_chars = 26 >= sender_username_length ? 26 : sender_username_length;
std::strncpy(sender_arrow_string, sender_username, number_of_chars);
sender_arrow_string[number_of_chars] = '\0';
std::strcat(sender_arrow_string, " ----");
std::string amount_sent_str = formatted_amount(amount_sent);
std::strncat(sender_arrow_string, amount_sent_str.c_str(), 10);
std::strcat(sender_arrow_string, "----> ");
std::snprintf(sender_arrow_formatted_string, 47, "%46s", sender_arrow_string);
fout << dt << ": " << sender_arrow_formatted_string << receiver_username;
if(!strcmp(message, "")) //if message is empty
fout << "\n";
else
{
fout << "\n \\_ " << sender_username << " said: ";
for(int i=0; message[i]!='\0'; ++i)
{
if(message[i] == '\n')
fout << "<new-line>"; //return-key pressed
else if(message[i] == '\v')
fout << "<vertical-tab>"; //vertical-tab symbol entered
else
fout << message[i];
}
fout << "\n\n";
}
fout.close();
chmod(really_temp_receiver_path, (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
if(!fout) //error
{
std::cerr << "Fatal error" << ERR_SEND_MESSAGE_RECEIVER_MSG_FILE_UNABLE_TO_BE_UPDATED_FATAL << ": the receiver message file was unable to be updated. Please contact login@tilde.town (town-only) or login@tilde.team (internet-wide to report this error (because it requires manual recovery).";
exit_program(ERR_SEND_MESSAGE_RECEIVER_MSG_FILE_UNABLE_TO_BE_UPDATED_FATAL);
}
else
{
std::remove(temp_receiver_path);
}
while(1)
{
if(!std::rename(really_temp_receiver_path, temp_receiver_path))
break;
}
// unlock_receiver_messages
while(1)
{
if(!std::rename(temp_receiver_path, receiver_path))
break;
}
chmod(receiver_path, (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
delete[] really_temp_receiver_path;
delete[] temp_receiver_path;
delete[] receiver_path;
//additional place to write if sending to a program:
if(program_exists(receiver_username))
{
random_string = std::string("rand");
std::string program_receiver_path = std::string(TCOIN_PROG_ACT_PATH) + std::string(receiver_username) + std::string("/_MESSAGES.txt");
std::string temp_program_receiver_path = std::string(TCOIN_PROG_ACT_PATH) + std::string(receiver_username) + std::string("/_MESSAGES") + random_string + std::string(".txt");
std::string really_temp_program_receiver_path = temp_program_receiver_path + std::string("_tmp");
//create program receiver's _MESSAGES file if none exists
{
std::ifstream fin(program_receiver_path.c_str());
std::ifstream fin2(temp_program_receiver_path.c_str());
if((!fin || file_is_empty(fin)) && (!fin2))
{
fin.close();
std::ofstream fout(program_receiver_path.c_str(), std::fstream::trunc);
fout << "\n";
fout.close();
}
else
fin.close();
fin2.close();
chmod(program_receiver_path.c_str(), (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
}
while(1)
{
if(!std::rename(program_receiver_path.c_str(), temp_program_receiver_path.c_str()))
{
std::ifstream fin(temp_program_receiver_path.c_str());
std::ofstream fout(really_temp_program_receiver_path.c_str());
if(!file_is_empty(fin))
fout << fin.rdbuf();
fin.close();
//now, sender_username, receiver_username, amount_sent
char sender_formatted_string[26];
char receiver_formatted_string[26];
std::snprintf(sender_formatted_string, 26, "%s", sender_username);
std::snprintf(receiver_formatted_string, 26, "%s", receiver_username);
std::string amount_sent_str = formatted_amount(amount_sent);
fout << now << "\t" << sender_formatted_string << "\t" << receiver_formatted_string << "\t" << amount_sent_str;
if(!strcmp(message, "")) //if message is empty
fout << "\n";
else
{
fout << "\t" << sender_formatted_string << "\t";
for(int i=0; message[i]!='\0'; ++i)
{
if(message[i] == '\n')
fout << "<new-line>"; //return-key pressed
else if(message[i] == '\v')
fout << "<vertical-tab>"; //vertical-tab symbol entered
else
fout << message[i];
}
fout << "\n";
}
fout.close();
chmod(really_temp_program_receiver_path.c_str(), (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
if(!fout) //error
{
std::cerr << "Fatal error " << ERR_SEND_MESSAGE_PROGRAM_RECEIVER_MSG_FILE_UNABLE_TO_BE_UPDATED_FATAL << ": the receiver program_message file was unable to be updated. Please contact login@tilde.town (town-only) or login@tilde.team (internet-wide to report this error (because it requires manual recovery).";
exit_program(ERR_SEND_MESSAGE_PROGRAM_RECEIVER_MSG_FILE_UNABLE_TO_BE_UPDATED_FATAL);
}
else
{
std::remove(temp_program_receiver_path.c_str());
}
while(1)
{
if(!std::rename(really_temp_program_receiver_path.c_str(), temp_program_receiver_path.c_str()))
break;
}
// unlock_receiver_messages
while(1)
{
if(!std::rename(temp_program_receiver_path.c_str(), program_receiver_path.c_str()))
break;
}
chmod(program_receiver_path.c_str(), (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
break;
}//if statement with !std::rename for receiver's program accounting _messages file
}//while loop for program accounting receiver's _messages file
}//receiver is program account
//locking sender_messages_after_receiver_messages_unlocked
random_string = std::to_string(rand());
char *sender_path = new char[strlen(sender_username) + sizeof(TCOIN_MSG_PATH) + 13]; //sizeof() includes '\0'
char *temp_sender_path = new char[strlen(sender_username) + strlen(random_string.c_str()) + sizeof(TCOIN_MSG_PATH) + 13];
std::strcpy(sender_path, TCOIN_MSG_PATH);
std::strcat(sender_path, sender_username);
std::strcat(sender_path, "_messages.txt"); // length = 13
std:strcpy(temp_sender_path, TCOIN_MSG_PATH);
std::strcat(temp_sender_path, sender_username);
std::strcat(temp_sender_path, random_string.c_str());
std::strcat(temp_sender_path, "_messages.txt"); // length = 13
while(1)
{
if(!std::rename(sender_path, temp_sender_path))
{
char *really_temp_sender_path = new char[strlen(temp_sender_path) + 5];
std::strcpy(really_temp_sender_path, temp_sender_path);
std::strcat(really_temp_sender_path, "_tmp"); // length = 4
fin.open(temp_sender_path);
fout.open(really_temp_sender_path);
chmod(really_temp_sender_path, (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
fout << fin.rdbuf();
now = std::time(NULL);
#ifndef TILDEINSTITUTE
std::strftime(dt, 26, "%a %b %_d %T %Y", std::gmtime(&now));
#else
std::strftime(dt, 26, "%a %b %e %T %Y", std::gmtime(&now));
#endif
char sender_formatted_string_right_aligned[26];
char receiver_arrow_formatted_string[47];
char receiver_arrow_string[47];
std::snprintf(receiver_formatted_string, 26, "%25s", receiver_username);
std::snprintf(sender_formatted_string, 26, "%-25s", sender_username);
std::snprintf(sender_formatted_string_right_aligned, 26, "%25s", sender_username);
int receiver_username_length = std::strlen(receiver_username);
int number_of_chars = 26 >= receiver_username_length ? 26 : receiver_username_length;
std::strncpy(receiver_arrow_string, receiver_username, number_of_chars);
receiver_arrow_string[number_of_chars] = '\0';
std::strcat(receiver_arrow_string, " <---");
std::string amount_sent_str = formatted_amount(amount_sent);
std::strncat(receiver_arrow_string, amount_sent_str.c_str(), 10);
std::strcat(receiver_arrow_string, "----- ");
std::snprintf(receiver_arrow_formatted_string, 47, "%46s", receiver_arrow_string);
fout << dt << ": " << receiver_arrow_formatted_string << sender_username;
if(!strcmp(message, "")) //if message is empty
fout << "\n";
else
{
fout << "\n \\_ " << sender_username << " said: ";
for(int i=0; message[i]!='\0'; ++i)
{
if(message[i] == '\n')
fout << "<new-line>"; //return-key pressed
else if(message[i] == '\v')
fout << "<vertical-tab>"; //vertical-tab symbol entered
else
fout << message[i];
}
fout << "\n\n";
}
fin.close();
fout.close();
if(!fout) //error
{
std::cerr << "Fatal error " << ERR_SEND_MESSAGE_SENDER_MSG_FILE_UNABLE_TO_BE_UPDATED_FATAL << ": the sender message file was unable to be updated. Please contact login@tilde.town (town-only) or login@tilde.team (internet-wide to report this error (because it requires manual recovery).";
exit_program(ERR_SEND_MESSAGE_SENDER_MSG_FILE_UNABLE_TO_BE_UPDATED_FATAL);
}
else
{
std::remove(temp_sender_path);
}
while(1)
{
if(!std::rename(really_temp_sender_path, temp_sender_path))
break;
}
while(1)
{
if(!std::rename(temp_sender_path, sender_path))
break;
}
delete[] really_temp_sender_path;
delete[] temp_sender_path;
delete[] sender_path;
break;
}
}
break;
}
}
//finally, everything ran well and we can send the message to stdout if verbose is turned on
if(!strcmp(option, "verbose") && strcmp(message, "")) //message should not be empty
{
//since the message to stdout from send() ends with "\n\n", we have commented this below line out
//std::cout << "\n";
std::cout << "In addition, the transaction message \"" << message << "\" was ";
std::cout << "sent from `" << sender_username << "` to `" << receiver_username << "` successfully.";
std::cout << "\n\n";
}
return 0;
}
bool user_is_locked(const char* username)
{
std::ifstream fin((std::string(TCOIN_PATH_W_SLASH) + std::string(username) + std::string("_locked.txt")).c_str());
if(!fin)
return false;
return true;
}
int send(const char* sender_username, const char* receiver_username, const long long int &amount_to_send, const long long int &base_amount, const char* option)
{
int final_return_value = 0;
//receiver usrname check
if(username_exists(receiver_username))
{
if(!strcmp(sender_username, receiver_username))
{
std::cout << "\nSorry, you cannot send tildecoins to yourself.\n\n";
return ERR_TCOIN_TO_SELF;
}
if(user_is_locked(receiver_username))
{
if(!strcmp(option, "verbose"))
std::cout << "\nSorry, `" << receiver_username << "` does not wish to receive any tildecoins at this time.\n\n";
return ERR_RECEIVER_BLOCKED;
}
if(amount_to_send <= 0)
{
if(!strcmp(option, "verbose"))
std::cout << "\nSorry, that amount is not valid. The amount should be a positive decimal number when truncated to two decimal places.\n\n";
return ERR_NEGATIVE_SEND_AMOUNT;
}
else
{
std::string random_string = std::to_string(rand());
int return_value = -1;
// sizeof() includes the NULL character at the end of the string
char* temp_sender_path = new char[strlen(sender_username) + strlen(random_string.c_str()) + sizeof(TCOIN_PATH_W_SLASH) + 4];
char* sender_path = new char[strlen(sender_username) + sizeof(TCOIN_PATH_W_SLASH) + 4];
char* temp_sender_username = new char[strlen(sender_username) + strlen(random_string.c_str()) + 1];
std::strcpy(temp_sender_username, sender_username);
std::strcat(temp_sender_username, random_string.c_str());
std::strcpy(temp_sender_path, TCOIN_PATH_W_SLASH);
std::strcat(temp_sender_path, temp_sender_username);
std::strcat(temp_sender_path, ".txt");
std::strcpy(sender_path, TCOIN_PATH_W_SLASH);
std::strcat(sender_path, sender_username);
std::strcat(sender_path, ".txt");
while(1)
{
if(!std::rename(sender_path, temp_sender_path))
{
//Insufficient funds check is in add_file_value()
//Returns 1 if insufficient funds, otherwise returns 0
return_value = add_file_value(temp_sender_username, -1 * amount_to_send, base_amount);
if(return_value == 0) // Funds sucessfully deducted from sender_username
{
random_string = std::to_string(rand());
// sizeof() includes the NULL character at the end of the string
char *temp_receiver_path = new char[strlen(receiver_username) + strlen(random_string.c_str()) + sizeof(TCOIN_PATH_W_SLASH) + 4];
char *receiver_path = new char[strlen(receiver_username) + sizeof(TCOIN_PATH_W_SLASH) + 4];
char *temp_receiver_username = new char[strlen(receiver_username) + strlen(random_string.c_str()) + 1];
std::strcpy(temp_receiver_username, receiver_username);
std::strcat(temp_receiver_username, random_string.c_str());
std::strcpy(temp_receiver_path, TCOIN_PATH_W_SLASH);
std::strcat(temp_receiver_path, temp_receiver_username);
std::strcat(temp_receiver_path, ".txt");
std::strcpy(receiver_path, TCOIN_PATH_W_SLASH);
std::strcat(receiver_path, receiver_username);
std::strcat(receiver_path, ".txt");
//create receiver's balance file if none exists
//the balance will be included in the receiver's
//account when she/he initialises her/his account
//at a later time
char *receiver_salt_path = new char[strlen(receiver_username) + sizeof(TCOIN_SALT_PATH) + 9];
// sizeof() includes the NULL character at the end of the string
char *receiver_salt_logged_in_path = new char[strlen(receiver_username) + sizeof(TCOIN_SALT_PATH) + 19];
std::strcpy(receiver_salt_path, TCOIN_SALT_PATH);
std::strcat(receiver_salt_path, receiver_username);
std::strcpy(receiver_salt_logged_in_path, receiver_salt_path);
std::strcat(receiver_salt_path, "_salt.txt");
std::strcat(receiver_salt_logged_in_path, "_salt_logged_in.txt");
std::ifstream fin(receiver_path);
std::ifstream fin2(receiver_salt_path);
std::ifstream fin3(receiver_salt_logged_in_path);
if((!fin || file_is_empty(fin)) && ((!program_exists(receiver_username)) || ((!fin2 || file_is_empty(fin2)) && (!fin3 || file_is_empty(fin3)))))
{
fin.close();
std::ofstream fout(receiver_path, std::fstream::trunc);
fout << "0\n";
fout.close();
}
else
fin.close();
fin2.close();
fin3.close();
chmod(receiver_path, (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
delete[] receiver_salt_path;
delete[] receiver_salt_logged_in_path;
while(1)
{
if(!std::rename(receiver_path, temp_receiver_path))
{
//Insufficient funds check in add_file_value() itself
add_file_value(temp_receiver_username, amount_to_send, base_amount);
//additional place to write if sending to a program:
if(program_exists(receiver_username))
{
random_string = std::string("rand");
std::string program_receiver_path = std::string(TCOIN_PROG_ACT_PATH) + std::string(receiver_username) + std::string("/") + std::string(sender_username) + std::string(".txt");
std::string temp_program_receiver_path = std::string(TCOIN_PROG_ACT_PATH) + std::string(receiver_username) + std::string("/") + std::string(sender_username) + random_string + std::string(".txt");
std::string temp_program_receiver_username = std::string(PROG_ACT_W_SLASH) + std::string(receiver_username) + std::string("/") + std::string(sender_username) + random_string;
//create program receiver's balance file if none exists
{
std::ifstream fin(program_receiver_path.c_str());
std::ifstream fin2(temp_program_receiver_path.c_str());
if((!fin || file_is_empty(fin)) && (!fin2))
{
fin.close();
std::ofstream fout(program_receiver_path.c_str(), std::fstream::trunc);
fout << "0\n";
fout.close();
}
else
fin.close();
fin2.close();
chmod(program_receiver_path.c_str(), (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
}
while(1)
{
if(!std::rename(program_receiver_path.c_str(), temp_program_receiver_path.c_str()))
{
//Insufficient funds check in add_file_value() itself
add_file_value(temp_program_receiver_username.c_str(), amount_to_send, base_amount);
//Value must also be added to a _total.txt file
{
random_string = std::string("rand");
std::string program_receiver_total_path = std::string(TCOIN_PROG_ACT_PATH) + std::string(receiver_username) + std::string("/_TOTAL.txt");
std::string temp_program_receiver_total_path = std::string(TCOIN_PROG_ACT_PATH) + std::string(receiver_username) + std::string("/_TOTAL") + random_string + std::string(".txt");
std::string temp_program_receiver_total_username = std::string(PROG_ACT_W_SLASH) + std::string(receiver_username) + std::string("/_TOTAL") + random_string;
//create program receiver's "total balance file" if none exists
{
std::ifstream fin(program_receiver_total_path.c_str());
std::ifstream fin2(temp_program_receiver_total_path.c_str());
if((!fin || file_is_empty(fin)) && (!fin2))
{
fin.close();
std::ofstream fout(program_receiver_total_path.c_str(), std::fstream::trunc);
fout << "0\n";
fout.close();
}
else
fin.close();
fin2.close();
chmod(program_receiver_total_path.c_str(), (S_IRUSR | S_IWUSR) & ~S_IRWXG & ~S_IRWXO);
}
while(1)
{
if(!std::rename(program_receiver_total_path.c_str(), temp_program_receiver_total_path.c_str()))
{
//Insufficient funds check in add_file_value() itself
add_file_value(temp_program_receiver_total_username.c_str(), amount_to_send, base_amount);
while(1)
{
if(!std::rename(temp_program_receiver_total_path.c_str(), program_receiver_total_path.c_str()))
break;
}
break;
}
}
}//value must also be added to a _total.txt file
while(1)
{
if(!std::rename(temp_program_receiver_path.c_str(), program_receiver_path.c_str()))
break;
}
break;
}//if statement with !std::rename for receiver's program accounting receiver balance file
}//while loop for program accounting receiver's balance file
}//receiver is program account
while(1)
{
if(!std::rename(temp_receiver_path, receiver_path))
break;
}
delete[] temp_receiver_path;
delete[] receiver_path;
delete[] temp_receiver_username;
break;
}//if statement with !std::rename for receiver_username.txt
}//while loop for receiver_username.txt
if(!strcmp(option, "verbose"))
{
std::cout << "\n";
cout_formatted_amount(amount_to_send, " tildecoins were ", " tildecoin was ");
std::cout << "sent from `" << sender_username << "` to `" << receiver_username << "`.";
std::cout << "\n\n";
}
}
else if(return_value == 1)
{
if(!strcmp(option, "verbose"))
{
long long int amount_of_funds = base_amount + get_file_value(temp_sender_username);
std::cout << "\nSorry, you do not have sufficient funds to execute this transaction. ";
std::cout << "Your current balance is ";
cout_formatted_amount(amount_of_funds, " tildecoins.\n\n", " tildecoin.\n\n");
}
final_return_value = ERR_INSUFFICIENT_FUNDS; //we don't simply "return 3" here because we want temp_sender_path to get renamed again
}
while(1)
{
if(!std::rename(temp_sender_path, sender_path))
break;
}
delete[] temp_sender_path;
delete[] sender_path;
delete[] temp_sender_username;
break;
}//if statement with !std::rename
}//while loop for sender
}//amount sent is more than 0
}//username exists
else
{
if(!strcmp(option, "verbose"))
std::cout << "\nSorry, no user with the username `" << receiver_username << "` was found.\n\n";
return ERR_RECEIVER_NOT_FOUND;
}
return final_return_value;
}
void help(long long int &base_amount)
{
std::cout << "\n - tildecoin (also called tcoin) is " << TCOIN_HOST_NAME << "'s very own digital (non-crypto) currency.";
std::cout << "\n - to participate in " << TCOIN_HOST_NAME << "'s internal economy by creating your own tcoin account, run `tcoin init`.";
std::cout << "\n - all users get "; cout_formatted_amount(base_amount); std::cout << " coins to start, and can send and receive coins from other users (and programs).";
std::cout << "\n - more information about tildecoin is available at \"https://tilde.town/~login/tcoin.html\".\n";
std::cout << "\n`tcoin`: check your balance and the 10 latest lines of messages";
std::cout << "\n`tcoin on`: log on to tildecoin";
std::cout << "\n`tcoin off`: out out of tildecoin";
std::cout << "\n`tcoin init`: initialise tcoin (you'll need to do this before using anything else)";
std::cout << "\n`tcoin balance` or `tcoin -b`: print the number representing your balance";
std::cout << "\n`tcoin breakdown` or `tcoin -bd`: print a breakdown of how your balance was determined";
std::cout << "\n`tcoin messages` or `tcoin -m`: print all messages";
std::cout << "\n`tcoin messages <num>` or `tcoin -m <num>`: print the last <num> messages";
std::cout << "\n`tcoin clear_messages` or `tcoin -cm`: clear all messages";
std::cout << "\n`tcoin send <username> <amount>` or `tcoin -s <username> <amount>`: send <amount> tildecoins to <username>";
std::cout << "\n`tcoin send <username> <amount> \"<message>\"` or `tcoin -s <username> <amount> \"<message>\"`: optionally, include a message to be sent to <username>";
std::cout << "\n`tcoin silentsend <username> <amount> [\"<message>\"]`, `tcoin send -s <username> <amount> [\"<message>\"]` or `tcoin -ss <username> <amount> [\"<message>\"]`: send <amount> tildecoins to <username> with an optional (as indicated by [ and ], which should not be included in the actual comment) message included without printing anything";
std::cout << "\nIn the commands with `<username> <amount>`, switching the two arguments around (i.e., from `<username> <amount>` to `<amount> <username>`) will also work";
std::cout << "\n`tcoin --help`, `tcoin help` or `tcoin -h`: print this help text";
std::cout << "\nSend an email to `login@tilde.town` (tilde.town local email) or `login@tilde.team` (internet-wide email), or `/query login` on IRC to request a passphrase reset.\n\n";
}
bool is_number(const char* test_string)
{
char* p;
std::strtod(test_string, &p);
return *p == 0;
}
bool message_is_long(const char* test_string)
{
for(int i=0; i < TCOIN_MSG_LENGTH_LIMIT+1; ++i)
if(test_string[i] == '\0')
{
return false; //message is shorter than TCOIN_MSG_LENGTH_LIMIT characters
}
return true; //message is longer than TCOIN_MSG_LENGTH_LIMIT characters
}
int main(int argc, char *argv[])
{
//sneaky scrypt magic (process overlaying to maintain suid)
{
std::ifstream codefin(TCOIN_CODEZ_PATH);
char code1[513], code2[513];
codefin >> code1;
codefin >> code2;
codefin.close();
if(argc==2 && !strctcmp(argv[1], code1))
{
std::string salt_file = std::string(TCOIN_SALT_PATH) + get_username() + std::string("_salt.txt");
std::string password_file = std::string(TCOIN_PASS_PATH) + get_username() + std::string("_password.txt");
execl(TCOIN_SCRYPT_PATH, "scrypt", "enc", "-m", "0.25", "-t", "10", salt_file.c_str(), password_file.c_str(), NULL);
}
if(argc==2 && !strctcmp(argv[1], code2))
{
std::string decrypted_password_file = std::string(TCOIN_PASS_PATH) + get_username() + std::string("_decrypted_password.txt");
std::string password_file = std::string(TCOIN_PASS_PATH) + get_username() + std::string("_password.txt");
execl(TCOIN_SCRYPT_PATH, "scrypt", "dec", password_file.c_str(), decrypted_password_file.c_str(), NULL);
}
}
//If ^C is sent while doing `tcoin on`, <username>_dercrypted_password.txt gets left behind
//this might cause the program to interpret the salt and password to be corrupted, and might
//ask to create a new passphrase. To prevent this, we cleanup _decrypted_password.txt on every
//start of tcoin
{
std::string decrypted_password_file = std::string(TCOIN_PASS_PATH) + get_username() + std::string("_decrypted_password.txt");
remove(decrypted_password_file.c_str());
}
base_amount = get_file_value("base/base");
long long int unaltered_base_amount = base_amount;
//adding tildebot scores from krowbar to base amount
#ifndef KROWBAR_OFF
{
std::string line;
const std::string username = get_username();
const int username_length = username.length();
std::ifstream fin(KROWBAR_SCORE_PATH);
while(std::getline(fin, line))
{
char* line_c_string = new char[line.length()+1];
std::strcpy(line_c_string, line.c_str());
const int irc_username_length = username_length > USERNAME_LENGTH_LIMIT ? USERNAME_LENGTH_LIMIT : username_length;
if(!std::strncmp(username.c_str(), line_c_string, irc_username_length))
{
char number_of_tildes[21];
number_of_tildes[0] = '0'; //just in case the loop below doesn't detect any digits
number_of_tildes[1] = '\0';
for(int i=0; i < 20; ++i)
{
if(std::isdigit(line_c_string[irc_username_length+3+i]))
number_of_tildes[i] = line_c_string[irc_username_length+3+i];
else
{
number_of_tildes[i] = '\0'; //manually terminating the string
break;
}
}
number_of_tildes[20] = '\0'; //incase the number overflows 20 characters
krowbar_amount = strtol100(number_of_tildes);
base_amount += krowbar_amount;
//multiplied by 100 inside strtol100() to convert tildecoins to centitildecoins, which
//is the unit used throughout the program (and converted appropriately when displayed)
break;
}
delete[] line_c_string;
}
}
#endif
#ifndef DA_OFF
//adding daily-adventure scores from troido to base amount
{
std::string number_of_tildes = exec(TROIDO_DACOINS_CMD);
number_of_tildes.pop_back();
//to get rid of the newline at the end
if(is_number(number_of_tildes.c_str()))
da_amount += strtol100(number_of_tildes.c_str());
base_amount += da_amount;
//multiplied by 100 to convert tildecoins to centitildecoins, which
//is the unit used throughout the program (and converted appropriately when displayed)
}
#endif
#ifndef MINERCOIN_OFF
//adding minercoin scores from minerobber to base amount
{
std::string command_to_exec = std::string(MINERCOIN_CMD_PRE_USERNAME) + get_username() + std::string(MINERCOIN_CMD_POST_USERNAME);
std::string number_of_tildes = exec(command_to_exec.c_str());
number_of_tildes.pop_back();
//to get rid of the newline at the end
if(is_number(number_of_tildes.c_str()))
minercoin_amount += strtol100(number_of_tildes.c_str());
base_amount += minercoin_amount;
//multiplied by 100 to convert tildecoins to centitildecoins, which
//is the unit used throughout the program (and converted appropriately when displayed)
}
#endif
srand((long int)(std::time(NULL)) + strtol_fast(exec(BIN_ECHO_CMD).c_str()));
if(argc > 1 && (!strcmp(argv[1], "--help") || !strcmp(argv[1], "help") || !strcmp(argv[1], "-h")))
{
help(unaltered_base_amount);
return 0;
}
if(argc > 1 && !strcmp(argv[1], "init"))
{
initialise_user(get_username().c_str(), base_amount);
return 0;
}
if(!user_has_initialised(get_username().c_str()))
{
std::cout << "\nSorry, tcoin has not been initialised. Please execute `tcoin init` to complete initialisation or `tcoin help` for help.\n\n";
return ERR_NO_INIT;
}
if(argc > 1 && !strcmp(argv[1], "on"))
{
return log_on(get_username().c_str()); //return codes are inside the log_on function
}
if(argc > 1 && !strcmp(argv[1], "off"))
{
return log_off(get_username().c_str()); //return codes are inside the log_off function
}
if(!is_logged_on(get_username().c_str()))
{
std::cout << "\nSorry, you have not logged on to tildecoin yet. Please execute `tcoin on` to log in or `tcoin help` for help.\n\n";
return ERR_NOT_LOGGED_IN;
}
user_amount = get_file_value(get_username().c_str());
long long int total_amount = base_amount + user_amount;
if(argc < 2)
{
//show last 10 messages
show_messages_tail(get_username().c_str(), 10);
show_balance(get_username().c_str(), total_amount, unaltered_base_amount, "base amount", user_amount, "transfers", krowbar_amount, "tilde game", da_amount, "daily-adventure game", minercoin_amount, "MinerCoin game");
}
else if(!strcmp(argv[1], "breakdown") || !strcmp(argv[1], "-bd"))
{
std::cout << "Total balance: ";
cout_formatted_amount(total_amount, " tildecoins\n", " tildecoin\n");
show_breakdown(unaltered_base_amount, "base amount", user_amount, "transfers", krowbar_amount, "tilde game", da_amount, "daily-adventure game", minercoin_amount, "MinerCoin game");
}
else if(!strcmp(argv[1], "balance") || !strcmp(argv[1], "-b"))
cout_formatted_amount(total_amount, "\n");
else if(!strcmp(argv[1], "messages") || !strcmp(argv[1], "-m"))
{
double number_of_messages = 0.0;
bool number_of_messages_is_specified = argc > 2 && is_number(argv[2]); //number of messages specified
if(number_of_messages_is_specified)
number_of_messages = std::strtod(argv[2], NULL);
if(number_of_messages >= 1.0) //number of messages specified is a valid number
show_messages_tail(get_username().c_str(), (long long int)(number_of_messages));
else //show all messages
show_messages(get_username().c_str());
}
else if(!strcmp(argv[1], "clear_messages") || !strcmp(argv[1], "-cm"))
{
clear_messages(get_username().c_str());
}
else if(!strcmp(argv[1], "send") || !strcmp(argv[1], "-s"))
{
if(argc == 5)
{
if(!strcmp(argv[2], "-s")) //silent send with no message
{
int return_value;
long long int amount = 0;
char *receiver = NULL;
if(is_number(argv[3]))
{
amount = strtol100(argv[3]);
receiver = argv[4];
}
else
{
amount = strtol100(argv[4]);
receiver = argv[3];
}
return_value = send(get_username().c_str(), receiver, amount, base_amount, "silent");
if(!return_value) //send was successful
send_message(get_username().c_str(), receiver, "", amount, "silent");
}
else //argument count is 5 because a custom message was included
{
int return_value;
long long int amount = 0;
char *receiver = NULL;
return_value = message_is_long(argv[4]);
if(return_value) //message is too long
{
std::cout << "\nSorry, the message was longer than " << TCOIN_MSG_LENGTH_LIMIT << " characters. Please keep messages at or below this limit.\n\n";
return ERR_MAIN_MSG_TOO_LONG;
}
if(is_number(argv[2]))
{
amount = strtol100(argv[2]);
receiver = argv[3];
}
else
{
amount = strtol100(argv[3]);
receiver = argv[2];
}
return_value = send(get_username().c_str(), receiver, amount, base_amount, "verbose");
if(!return_value) //send was successful
send_message(get_username().c_str(), receiver, argv[4], amount, "verbose");
}
}
else if(argc == 6)
{
if(!strcmp(argv[2], "-s"))
{ //argument count is 6 because of silent send with custom message included
int return_value;
long long int amount = 0;
char *receiver = NULL;
return_value = message_is_long(argv[5]);
if(return_value) //message is too long
{
std::cout << "\nSorry, the message was longer than " << TCOIN_MSG_LENGTH_LIMIT << " characters. Please keep messages at or below this limit.\n\n";
return ERR_MAIN_MSG_TOO_LONG;
}
if(is_number(argv[3]))
{
amount = strtol100(argv[3]);
receiver = argv[4];
}
else
{
amount = strtol100(argv[4]);
receiver = argv[3];
}
return_value = send(get_username().c_str(), receiver, amount, base_amount, "silent");
if(!return_value) //send was successful
send_message(get_username().c_str(), receiver, argv[5], amount, "silent");
}
else
{
//too many command-line arguments were passed (6 args) (probably a message was intended)
std::cout << "\nSorry, too many command-line arguments were passed. The correct format is `tcoin send <username> <amount> \"<message>\"`.\n\n";
return ERR_MAIN_SEND_TOO_MANY_ARGS_MSG;
}
}
else if(argc < 4)
{
std::cout << "\nSorry, too few command-line arguments were passed. The correct format is `tcoin send <username> <amount>`.\n\n";
return ERR_MAIN_SEND_TOO_FEW_ARGS;
}
else if(argc > 4)
{
std::cout << "\nSorry, too many command-line arguments were passed. The correct format is `tcoin send <username> <amount>`.\n\n";
return ERR_MAIN_SEND_TOO_MANY_ARGS;
}
else
{
int return_value;
long long int amount = 0;
char* receiver = NULL;
if(is_number(argv[2]))
{
amount = strtol100(argv[2]);
receiver = argv[3];
}
else
{
amount = strtol100(argv[3]);
receiver = argv[2];
}
return_value = send(get_username().c_str(), receiver, amount, base_amount, "verbose");
if(!return_value) //send was successful
send_message(get_username().c_str(), receiver, "", amount, "verbose");
}
}
else if(!strcmp(argv[1], "silentsend") || !strcmp(argv[1], "-ss"))
{
if(argc==4)
{
int return_value;
long long int amount = 0;
char* receiver = NULL;
if(is_number(argv[2]))
{
amount = strtol100(argv[2]);
receiver = argv[3];
}
else
{
amount = strtol100(argv[3]);
receiver = argv[2];
}
return_value = send(get_username().c_str(), receiver, amount, base_amount, "silent");
if(!return_value) //send was successful
send_message(get_username().c_str(), receiver, "", amount, "silent");
}
else if(argc==5) //custom message included
{
int return_value;
long long int amount = 0;
char* receiver = NULL;
return_value = message_is_long(argv[4]);
if(return_value) //message is too long
{
std::cout << "\nSorry, the message was longer than " << TCOIN_MSG_LENGTH_LIMIT << " characters. Please keep messages at or below this limit.\n\n";
return ERR_MAIN_MSG_TOO_LONG;
}
if(is_number(argv[2]))
{
amount = strtol100(argv[2]);
receiver = argv[3];
}
else
{
amount = strtol100(argv[3]);
receiver = argv[2];
}
return_value = send(get_username().c_str(), receiver, amount, base_amount, "silent");
if(!return_value) //send was successful
send_message(get_username().c_str(), receiver, argv[4], amount, "silent");
}
else
return ERR_SILENTSEND;
}
else
{
std::cout << "\nSorry, an unknown command-line argument was received. `tcoin help` will print the help text.\n\n";
return ERR_UNKNOWN_ARG;
}
return 0;
}