Poco::Crypto--加解密(AES)

Poco::Crypto--加解密(AES)

 1     int main(const std::vector<std::string>& args)
 2     {
 3         /*TO DO*/
 4         Cipher::Ptr pCipher = CipherFactory::defaultFactory().createCipher(CipherKey("aes256"));
 5 
 6         std::string in("I love karen!");
 7         std::string out = pCipher->encryptString(in, Cipher::ENC_BASE64);
 8         std::string result = pCipher->decryptString(out, Cipher::ENC_BASE64);
 9         std::cout<<"加密后:"<<out<<std::endl;
10         std::cout<<"解密后:"<<result<<std::endl;
11 
12         return Application::EXIT_OK;
13     }

1、第4行代码，创建一个256位的AES加密算法；

注：http://zh.wikipedia.org/wiki/%E9%AB%98%E7%BA%A7%E5%8A%A0%E5%AF%86%E6%A0%87%E5%87%86  AES维基百科

2、第7、8行代码，分别实现加密与解密过程。

3、在加密与解密过程中，代码中使用了BASE64编码方式，另外在POCO::Crypto中还有以下编码方式：

enum Encoding
/// Transport encoding to use for encryptString() and decryptString().
{
ENC_NONE = 0x00, /// Plain binary output
ENC_BASE64 = 0x01, /// Base64-encoded output
ENC_BINHEX = 0x02, /// BinHex-encoded output
ENC_BASE64_NO_LF = 0x81, /// Base64-encoded output, no linefeeds
ENC_BINHEX_NO_LF = 0x82, /// BinHex-encoded output, no linefeeds
};

 1     int main(const std::vector<std::string>& args)
 2     {
 3         /*TO DO*/
 4         Cipher::Ptr pCipher = CipherFactory::defaultFactory().createCipher(CipherKey("aes256"));
 5 
 6         static const std::string SECRET_MESSAGE = "This is a secret message. Don't tell anyone.";
 7 
 8         std::stringstream sstr;
 9         EncryptingOutputStream encryptor(sstr, *pCipher);
10         encryptor << SECRET_MESSAGE;
11         encryptor.close();
12 
13         DecryptingInputStream decryptor(sstr, *pCipher);
14         std::string iresult;
15         Poco::StreamCopier::copyToString(decryptor, iresult);
16         
17         std::cout<<"解密后:"<<iresult<<std::endl;
18         return Application::EXIT_OK;
19     }

1、第6行，为原文；

2、第9行，加密；第13行，解密；

3、第15行，得到解密结果，就是原文了。