pineapple/externals/cpp-jwt/examples/simple_ex3_rsa.cc
2022-07-26 03:25:01 +02:00

82 lines
2.2 KiB
C++
Executable file

#include <chrono>
#include <cassert>
#include <fstream>
#include <string>
#include <iostream>
#include "jwt/jwt.hpp"
/***
* STEPS TO GENERATE RSA PRIVATE PUBLIC KEYPAIR.
*
* 1. openssl genrsa -out jwtRS256.key 1024
* 2. openssl rsa -in jwtRS256.key -pubout -outform PEM -out jwtRS256.key.pub
*/
std::string read_from_file(const std::string& path)
{
std::string contents;
std::ifstream is{path, std::ifstream::binary};
if (is) {
// get length of file:
is.seekg (0, is.end);
auto length = is.tellg();
is.seekg (0, is.beg);
contents.resize(length);
is.read(&contents[0], length);
if (!is) {
is.close();
return {};
}
} else {
std::cerr << "FILE not FOUND!!" << std::endl;
}
is.close();
return contents;
}
int main() {
using namespace jwt::params;
const std::string priv_key_path = std::string{CERT_ROOT_DIR} + "/jwtRS256.key";
const std::string pub_key_path = std::string{CERT_ROOT_DIR} + "/jwtRS256.key.pub";
auto priv_key = read_from_file(priv_key_path);
jwt::jwt_object obj{algorithm("RS256"), secret(priv_key), payload({{"user", "admin"}})};
//Use add_claim API to add claim values which are
// _not_ strings.
// For eg: `iat` and `exp` claims below.
// Other claims could have been added in the payload
// function above as they are just stringy things.
obj.add_claim("iss", "arun.muralidharan")
.add_claim("sub", "test")
.add_claim("id", "a-b-c-d-e-f-1-2-3")
.add_claim("iat", 1513862371)
.add_claim("exp", std::chrono::system_clock::now() + std::chrono::seconds{10})
;
//Use `has_claim` to check if the claim exists or not
assert (obj.has_claim("iss"));
assert (obj.has_claim("exp"));
//Use `has_claim_with_value` to check if the claim exists
//with a specific value or not.
assert (obj.payload().has_claim_with_value("id", "a-b-c-d-e-f-1-2-3"));
assert (obj.payload().has_claim_with_value("iat", 1513862371));
auto pub_key = read_from_file(pub_key_path);
std::error_code ec{};
auto sign = obj.signature(ec);
if (ec) {
std::cerr << ec.message() << std::endl;
return 1;
}
auto dec_obj = jwt::decode(sign, algorithms({"RS256"}), verify(false), secret(pub_key));
return 0;
}