Linux AES加密算法实现
提供SDK给别人调用时候，有时候需要一个llicense.lic，一下是一个最简单的Demo，使用AES算法进行加密，在网上找了半天没有任何头绪，也不知道该怎么做。能够想到的就是这种比较low的方法了。
1依赖
一下AES算法是在crypto++库上实现的，首先安装crypto++。去官网下载相应的源码，低版本的好像对需要4.7一下版本GCC，我这里选择的是5.65。
安装：
make
make libcryptopp.so
make install 安装很简单，完成之后默认头文件在/usr/local/include下，链接库在/usr/local/lib下。
2实现
我使用的是读取mac地址和系统时间，对齐加密后存入llicense.lic，使用时候解密后给别人使用就ok了。
这里读取系统时间以及mac地址见https://blog.csdn.net/ycdhqzhiai/article/details/80840392
源码如下：
/*
AES.h
*/
#include /*
Decrypt.cpp 解密
*/
#include "AES.h"
#include (cipherText[i]));
cipherTextHex += ch;
}
return cipherTextHex;
}
string MyAES::Decrypt(string cipherTextHex)
{
string cipherText;
string decryptedText;
int i = 0;
while(true)
{
char c;
int x;
stringstream ss;
ss<2).c_str();
ss>>x;
c = (char)x;
cipherText += c;
if(i >= cipherTextHex.length() - 2)break;
i += 2;
}
//
CryptoPP::AES::Decryption aesDecryption(key, CryptoPP::AES::DEFAULT_KEYLENGTH);
CryptoPP::CBC_Mode_ExternalCipher::Decryption cbcDecryption( aesDecryption, iv );
CryptoPP::StreamTransformationFilter stfDecryptor(cbcDecryption, new CryptoPP::StringSink( decryptedText ));
stfDecryptor.Put( reinterpret_cast<const unsigned char*>( cipherText.c_str() ), cipherText.size());
stfDecryptor.MessageEnd();
return decryptedText;
}
string ltos(long l)
{
ostringstream os;
os<string result;
istringstream is(os.str());
is>>result;
return result;
}
int main() {
byte key[] = {
0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x01, 0x01,0x02, 0x03,0x04,0x05,0x06,0x07,0x01};
byte iv[] = {
0x01,0x02,0x03,0x03,0x03,0x03,0x03,0x03, 0x03,0x03, 0x01,0x02,0x03,0x03,0x03,0x03};
int keysize = 16;
std::string month = "1";
MyAES aes(key, iv, keysize);
cout << "AES parameters: " << endl;
cout << "The algorithm name is : " << AES::StaticAlgorithmName() << endl;
cout << "The iv is : " << aes.iv << endl;
cout << "The key is : " << aes.key << endl;
cout << "The key length is : " << aes.key_length << endl;
string month_cipher = aes.Encrypt(month);
ofstream out("license.lic", ios::app);
out.write(month_cipher.c_str(), month_cipher.length());
out.close();
ifstream in("license.lic");
string line;
string decryptedText;
while(getline(in, line))
{
if(line.length() > 1)
{
decryptedText = aes.Decrypt(line);
}
cout<<"readCipher finish "<< decryptedText <return 0;
}
/*
Encrypt.cpp 加密
*/
#include "AES.h"
#include (cipherText[i]));
cipherTextHex += ch;
}
return cipherTextHex;
}
string MyAES::Decrypt(string cipherTextHex)
{
string cipherText;
string decryptedText;
int i = 0;
while(true)
{
char c;
int x;
stringstream ss;
ss<2).c_str();
ss>>x;
c = (char)x;
cipherText += c;
if(i >= cipherTextHex.length() - 2)break;
i += 2;
}
//
CryptoPP::AES::Decryption aesDecryption(key, CryptoPP::AES::DEFAULT_KEYLENGTH);
CryptoPP::CBC_Mode_ExternalCipher::Decryption cbcDecryption( aesDecryption, iv );
CryptoPP::StreamTransformationFilter stfDecryptor(cbcDecryption, new CryptoPP::StringSink( decryptedText ));
stfDecryptor.Put( reinterpret_cast<const unsigned char*>( cipherText.c_str() ), cipherText.size());
stfDecryptor.MessageEnd();
return decryptedText;
}
string ltos(long l)
{
ostringstream os;
os<string result;
istringstream is(os.str());
is>>result;
return result;
}
int main() {
byte key[] = {
0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x01, 0x01,0x02, 0x03,0x04,0x05,0x06,0x07,0x01};
byte iv[] = {
0x01,0x02,0x03,0x03,0x03,0x03,0x03,0x03, 0x03,0x03, 0x01,0x02,0x03,0x03,0x03,0x03};
int keysize = 16;
char * this_mac = new char[6];
get_mac(this_mac);
printf("this mac: %s\n", this_mac);
time_t tt = time(NULL);
long cur_t = (long)tt;
string begin = ltos(cur_t);
char mac[64];
sprintf(mac,"%02x:%02x:%02x:%02x:%02x:%02x",this_mac[0]&0xff, this_mac[1]&0xff, this_mac[2]&0xff, this_mac[3]&0xff, this_mac[4]&0xff, this_mac[5]&0xff);
printf("mac: %02x:%02x:%02x:%02x:%02x:%02x\n", this_mac[0]&0xff, this_mac[1]&0xff, this_mac[2]&0xff, this_mac[3]&0xff, this_mac[4]&0xff, this_mac[5]&0xff);
std::string mac_addre = mac;
//std::string month = "1";
printf("mac: %s time: %s \n", mac_addre.c_str(), begin.c_str());
MyAES aes(key, iv, keysize);
cout << "AES parameters: " << endl;
cout << "The algorithm name is : " << AES::StaticAlgorithmName() << endl;
cout << "The iv is : " << aes.iv << endl;
cout << "The key is : " << aes.key << endl;
cout << "The key length is : " << aes.key_length << endl;
string mac_cipher = aes.Encrypt(mac_addre);
string time_cipher = aes.Encrypt(begin);
//string month_cipher = aes.Encrypt(month);
cout << "The mac_cipher is : " << mac_cipher << endl;
cout << "The time_cipher is : " << time_cipher << endl;
if (access("license.lic", 0) == -1)
system("touch license.lic");
ofstream out("license.lic");
out.write(mac_cipher.c_str(), mac_cipher.length());
out << "\n";
//out.write("\n");
out.write(time_cipher.c_str(), time_cipher.length());
out << "\n";
//out.write(month_cipher.c_str(), month_cipher.length());
out.close();
return 0;
}
3编译
编译很简单，只需要链接上libcryptopp.so就行
g++ *.cpp -o * -lpthread -lcryptoppPS::
如果想用在caffe项目中，切记将#include “AES.h”放在最上面