Encryption using CBC mode of the crypto++ Library (ii)

There is already an article about the encryption implemented using the crypto++ library, but the code is not completely considered, so it re-sent a second

C + + Encapsulation:

#include"Zyaes.h"#include<string.h>#include<stdio.h>using namespaceCryptopp; Czyaes::czyaes () {byteBytekey[] = {0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,                 0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08}; byteByteiv[] = {0x01,0x02,0x03,0x04,0x01,0x02,0x03,0x04,0x01,0x02,0x03,0x04,0x01,0x02,0x03,0x04}; memcpy (M_arrbytekey, Bytekey,sizeof(byte) * +); memcpy (M_arrbyteiv, Byteiv,sizeof(byte) * -); M_nkeylen= +;} Czyaes::~Czyaes () {}//set key and IVvoidCzyaes::setkey (std::stringStrkey, std::stringStriv) {    intNkeylen =0; intNivlen =0; memset (M_arrbytekey,0,sizeof(byte) * +); memset (M_arrbyteiv,0,sizeof(byte) * -); if(Strkey.length () >= +) {Nkeylen= +; }    Else{Nkeylen=strkey.length (); } memcpy (M_arrbytekey, Strkey.c_str (),sizeof(byte) *Nkeylen); if(!Striv.empty ()) {        if(Striv.length () >= -) {Nivlen= -; }            Else{Nivlen=striv.length (); } memcpy (M_arrbyteiv, Striv.c_str (),sizeof(byte) *Nivlen); }}//EncryptSTD::stringCzyaes::encrypt (ConstSTD::string&StrText) {std::stringStrcipher; Cbc_mode<AES>:: Encryption Aesencryptor (M_arrbytekey, M_nkeylen, M_ARRBYTEIV); Stringsource (StrText,true,NewStreamtransformationfilter (Aesencryptor,NewStringsink (Strcipher)); STD::stringstrencoded; Stringsource S2 (Strcipher,true,        NewHexencoder (NewStringsink (strencoded))//Hexencoder);//Stringsource    returnstrencoded;}//DecryptSTD::stringCzyaes::D Ecrypt (ConstSTD::string&strcipher) {std::stringstrdecoded; Stringsource S2 (Strcipher,true,        NewHexdecoder (NewStringsink (strdecoded))//Hexencoder);//Stringsourcestd::stringStrText; Cbc_mode<AES>::D ecryption aesencryptor (M_arrbytekey, M_nkeylen, M_ARRBYTEIV); Stringsource (strdecoded,true,NewStreamtransformationfilter (Aesencryptor,NewStringsink (StrText)); returnStrText;}

implementation file

Header file

C Package:

//*****************************************************************************//@FileName: Aes256.cpp//@Version: v1.0.0//@Author: Xiaoc//@Date: 2015/03/13//*****************************************************************************#include"Zyaes.h"#include"zyaes256.h"using namespacestd;stringEncrypt (Const string&strtext,Const string&strkey/* = "" */) {std::stringStrcipher; intNlen =0;        Czyaes AES; if(!Strkey.empty ()) {AES. Setkey (strkey,""); } strcipher=AES.    Encrypt (StrText); returnStrcipher;}stringDecrypt (Const string&strcipher,Const string&strkey/* = "" */) {std::stringStrText; intNlen =0;        Czyaes AES; if(!Strkey.empty ()) {AES. Setkey (strkey,""); } StrText=AES.    Decrypt (Strcipher); returnStrText;}

implementation file

//*****************************************************************************//@FileName: Zyaes256.h:the C Interface of class Zyaes//@Version: v1.0.0//@Author: Xiaoc//@Date: 2015/03/13//*****************************************************************************#ifndef _zyaes256_h_#define_zyaes256_h_#include<string>//*****************************************************************************//@strText: Data that needs to be encrypted//@strKey: Encryption key//@return: Returns the data after encryption//*****************************************************************************STD::stringEncrypt (ConstSTD::string&strtext,ConstSTD::string&strkey ="");//*****************************************************************************//@strText: Data that needs to be decrypted//@strKey: Decryption key//@return: Returns the data after decryption//*****************************************************************************STD::stringDecrypt (ConstSTD::string&strcipher,ConstSTD::string&strkey ="");#endif //_zyaes256_h_

header File

This modification was largely due to the fact that the transmission of encrypted data in the network was not considered in the previous release because the encrypted data was no longer a simple ASCII character, so it could not exist in the char array, which caused the loss of data because 0 of the encrypted data caused the string to be truncated.

So now it's time to convert the encrypted data to 16 binary. Then the transmission, the decryption side to do the opposite processing can.

One of the questions is that the Cryptopp encryption library will have encrypted data in a string, but why can a string store non-ASCII characters?

Encryption using CBC mode of the crypto++ Library (ii)