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caffe_encrypt.cpp
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caffe_encrypt.cpp
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//
// Created by liuhao on 9/6/18.
//
#include "caffe_encrypt.h"
#include <fstream>
#include <google/protobuf/text_format.h>
#include <google/protobuf/io/coded_stream.h>
#include <google/protobuf/io/zero_copy_stream_impl.h>
#include <glog/logging.h>
#include <fcntl.h>
#include <sstream>
#include "caffe.pb.h"
using google::protobuf::io::FileInputStream;
using google::protobuf::io::ZeroCopyInputStream;
using google::protobuf::io::CodedInputStream;
using google::protobuf::Message;
void caffe_encrypt::encrypt_binary(const std::string &file_name, const std::string &passwd,
const std::string &output_file){
if(passwd.empty())
return;
std::ifstream in_file(file_name,std::ios::binary);
if(!in_file)
return;
std::streampos begin, end;
begin = in_file.tellg();
in_file.seekg(0, std::ios::end);
end = in_file.tellg();
std::size_t size = end - begin;
fprintf(stdout, "engine file size: %d bytes\n", size);
in_file.seekg(0, std::ios::beg);
std::vector<unsigned char> engine_data(size);
in_file.read((char*)engine_data.data(), size);
in_file.close();
std::ofstream out_proto(output_file, std::ios::out | std::ios::binary);
if (!out_proto.is_open()) {
fprintf(stderr, "fail to open file to write: %s\n", output_file.c_str());
return;
}
//encode
if(passwd.size()>0)
{
int password_len=passwd.size();
for(int i=0;i<engine_data.size();++i)
{
unsigned char before_encode=engine_data[i];
unsigned char encode_word=(before_encode)^(unsigned char)passwd[i%password_len];
out_proto.put(encode_word);
//outfile.write((char*)&encode_word, sizeof(char));
}
}
out_proto.close();
}
void caffe_encrypt::encrypt_proto(const std::string &file_name, const std::string &passwd,
const std::string &output_file){
if(passwd.empty())
return;
std::ifstream in_file(file_name);
if(!in_file)
return;
std::streampos begin, end;
begin = in_file.tellg();
in_file.seekg(0, std::ios::end);
end = in_file.tellg();
std::size_t size = end - begin;
fprintf(stdout, "engine file size: %d bytes\n", size);
in_file.seekg(0, std::ios::beg);
std::vector<unsigned char> engine_data(size);
in_file.read((char*)engine_data.data(), size);
in_file.close();
std::ofstream out_file(output_file,std::ios::binary);
//encode
if(passwd.size()>0)
{
int password_len=passwd.size();
for(int i=0;i<engine_data.size();++i)
{
unsigned char before_encode=engine_data[i];
unsigned char encode_word=(before_encode)^(unsigned char)passwd[i%password_len];
out_file.put(encode_word);
//outfile.write((char*)&encode_word, sizeof(char));
}
}
out_file.close();
}
void caffe_encrypt::encrypt(const std::string &prefix, const std::string &passwd,
const std::string &output_name)
{
if(passwd.empty())
return;
//encode prototxt
encrypt_proto(prefix+".prototxt",passwd,output_name+".prototxt");
//encode model
encrypt_binary(prefix+".caffemodel",passwd,output_name+".caffemodel");
}
void caffe_encrypt::decrypt_binary(const std::string& file_name,const std::string& passwd,caffe::NetParameter& params)
{
std::ifstream in_file(file_name,std::ios::binary);
if(!in_file)
return;
std::streampos begin, end;
begin = in_file.tellg();
in_file.seekg(0, std::ios::end);
end = in_file.tellg();
std::size_t size = end - begin;
fprintf(stdout, "engine file size: %d bytes\n", size);
in_file.seekg(0, std::ios::beg);
std::string engine_data(size,'c');
in_file.read((char*)engine_data.data(), size);
in_file.close();
int pwd_len=passwd.size();
if(pwd_len>0)
{
//decrypt
for (size_t i = 0; i < engine_data.size(); ++i)
{
engine_data[i]=(((unsigned char)engine_data[i])^((unsigned char)passwd[i%pwd_len]));
}
}
std::istringstream net_model(engine_data);
google::protobuf::io::IstreamInputStream* model_input=new google::protobuf::io::IstreamInputStream((std::istream*)(&net_model));
google::protobuf::io::CodedInputStream* coded_input_model=new google::protobuf::io::CodedInputStream(model_input);
coded_input_model->SetTotalBytesLimit(INT_MAX,536870912);
params.ParseFromCodedStream(coded_input_model);
delete model_input;
delete coded_input_model;
return;
}
void caffe_encrypt::decrypt_proto(const std::string &file_name, const std::string &passwd, caffe::NetParameter& params){
std::ifstream in_file(file_name,std::ios::binary);
if(!in_file)
return;
std::streampos begin, end;
begin = in_file.tellg();
in_file.seekg(0, std::ios::end);
end = in_file.tellg();
std::size_t size = end - begin;
fprintf(stdout, "engine file size: %d bytes\n", size);
in_file.seekg(0, std::ios::beg);
std::string engine_data(size,'c');
in_file.read((char*)engine_data.data(), size);
in_file.close();
int pwd_len=passwd.size();
if(pwd_len>0)
{
//decrypt
for (size_t i = 0; i < engine_data.size(); ++i)
{
engine_data[i]=(((unsigned char)engine_data[i])^((unsigned char)passwd[i%pwd_len]));
}
}
std::istringstream net_proto(engine_data);
google::protobuf::io::IstreamInputStream* proto_input=new google::protobuf::io::IstreamInputStream((std::istream*)(&net_proto));
google::protobuf::io::ZeroCopyInputStream* coded_input_proto=proto_input;
google::protobuf::TextFormat::Parse(coded_input_proto,¶ms);
delete proto_input;
return;
}