passwdgen/main.cpp
2020-10-22 12:13:08 +01:00

69 lines
2.2 KiB
C++

#include <iostream>
#include <random>
std::string random_string(std::size_t length, bool punc) {
std::string CHARACTERS;
std::string ALPHANUM = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
std::string SPECIALS = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~";
if (punc) {
CHARACTERS = ALPHANUM.append(SPECIALS);
} else {
CHARACTERS = ALPHANUM;
}
std::random_device random_device;
std::mt19937 generator(random_device());
std::uniform_int_distribution<> distribution(0, CHARACTERS.size() - 1);
std::string random_string;
for (std::size_t i = 0; i < length; ++i) {
random_string += CHARACTERS[distribution(generator)];
}
return random_string;
}
void show_usage(std::string binname) {
std::cerr << "Usage: " << binname << " [OPTIONS] " << std::endl
<< "Options:" << std::endl
<< "\t-h, --help \t\tShow this help message" << std::endl
<< "\t-l, --length \t\tThe length of the password (default: 32)" << std::endl
<< "\t-p, --punctuation \t\tToggle special characters (default: false)"
<< std::endl;
}
int main(int argc, char *argv[]) {
std::string passlenstr;
int passlen;
bool punc = false;
if (argc < 1) {
std::cout << random_string(32, false) << std::endl;
return 0;
} else {
for (int i = 1; i < argc; ++i) {
std::string arg = argv[i];
if ((arg == "-h") || (arg == "--help")) {
show_usage(argv[0]);
return 0;
} else if (arg == "-p") {
punc = true;
} else if ((arg == "-l") || (arg == "--length")) {
passlenstr = argv[i + 1];
if (passlenstr.empty()) {
std::cerr << "--destination option requires one argument." << std::endl;
return 1;
}
}
}
if (passlenstr.empty()) {
passlenstr = "32";
}
passlen = std::stoi(passlenstr);
std::string password = random_string(passlen, punc);
std::cout << password << std::endl;
return 0;
}
}