102 lines
3.8 KiB
C++
102 lines
3.8 KiB
C++
#include <google/protobuf/message.h>
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#include <misc/base64.h>
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//#define NO_OPEN_SSL
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#include <misc/digest.h>
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#include <cstring>
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#include <cassert>
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#include "crypt.h"
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#include "License.h"
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using namespace std;
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using namespace std::chrono;
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inline void generate(char* buffer, size_t length){
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for(int index = 0; index < length; index++)
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buffer[index] = rand();
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}
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namespace license {
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std::string LicenseTypeNames[] = LT_NAMES;
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std::shared_ptr<License> readLocalLicence(const std::string& buffer, std::string& error){
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string bbuffer = base64::decode(buffer);
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if(bbuffer.length() < sizeof(License)) {
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error = "invalid size";
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return nullptr;
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}
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auto license = static_cast<License *>(malloc(sizeof(License)));
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memcpy(license, bbuffer.data(), sizeof(License));
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if(license->header.version != LICENSE_VERSION){
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error = "invalid version (" + to_string(license->header.version) + ")";
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return nullptr;
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}
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xorBuffer(&((char*) license)[sizeof(License::header)], sizeof(License::data), license->header.cryptKey, sizeof(license->header.cryptKey));
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auto hash = digest::sha1(reinterpret_cast<const char *>(&license->data), sizeof(license->data));
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uint64_t checkSum = 0;
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for(int i = 0; i < SHA_DIGEST_LENGTH; i++)
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checkSum += (uint8_t) hash[i] << (i % 8);
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if((checkSum ^ *(uint64_t*) &license->header.cryptKey) != MAGIC_NUMER) {
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error = "invalid check sum";
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return nullptr;
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}
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return shared_ptr<License>(license, [](License* l){
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if(l) free(l);
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});
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}
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std::string exportLocalLicense(const std::shared_ptr<License>& ref){
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auto copy = static_cast<License *>(malloc(sizeof(License)));
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memcpy(copy, ref.get(), sizeof(License));
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auto hash = digest::sha1(reinterpret_cast<const char *>(©->data), sizeof(copy->data));
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uint64_t checkSum = 0;
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for(int i = 0; i < SHA_DIGEST_LENGTH; i++)
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checkSum += (uint8_t) hash[i] << (i % 8);
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checkSum ^= MAGIC_NUMER;
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generate(const_cast<char *>(copy->header.cryptKey), sizeof(copy->header.cryptKey));
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*(uint64_t*) ©->header.cryptKey = checkSum;
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xorBuffer(&((char*) copy)[sizeof(License::header)], sizeof(License::data), copy->header.cryptKey, sizeof(copy->header.cryptKey));
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auto result = base64_encode((const char*) copy, sizeof(License));
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free(copy);
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return result;
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}
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std::string createLocalLicence(LicenseType type, std::chrono::system_clock::time_point until, std::string licenseOwner){
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auto license = shared_ptr<License>(static_cast<License *>(malloc(sizeof(License))), [](License* l) { if(l) free(l); });
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assert(licenseOwner.length() < sizeof(license->data.licenceOwner));
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license->header.version = LICENSE_VERSION;
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generate(const_cast<char *>(license->data.licenceKey), sizeof(license->data.licenceKey));
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generate(const_cast<char *>(license->data.licenceOwner), sizeof(license->data.licenceOwner)); //Crap data :)
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license->data.type = type;
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license->data.endTimestamp = duration_cast<milliseconds>(until.time_since_epoch()).count();
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memcpy((void *) license->data.licenceOwner, licenseOwner.c_str(), strlen(licenseOwner.c_str()) + 1); //Copy the string into it
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return exportLocalLicense(license);
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}
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const char *exceptions::LicenseException::what() const throw() {
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return this->errorMessage.c_str();
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}
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protocol::packet::packet(PacketType packetId, const ::google::protobuf::Message& message) {
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this->header.packetId = packetId;
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this->data = message.SerializeAsString();
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}
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protocol::packet::packet(license::protocol::PacketType packetId, nullptr_t) {
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this->header.packetId = packetId;
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this->data = "";
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}
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} |