一. 下载Crypto++ Library
Crypto++ Library的官方网:http://www.cryptopp.com/
二. 建立自己使用的Crypto++ Library
由于从官方网下载的Crypto++库是开源的,只有源文件和几个可以生成lib、dll的工程,以及一个使用的例子工程,因此希望生成自己建的工程能使用的SDK。
1.编译链接生成cryptlib.lib
打开cryptest.sln,分别在Debug模式和Release模式下编译链接cryptlib工程,成功后会在cryptopp54\Win32\output\debug和cryptopp54\Win32\output\release下生成cryptlib.lib文件。作者当时用的是Crypto++ 5.62版本。
Build时方法是,右击Solution Explorer中的cryptlib工程,单击build。第一次时它会报错,没关系,按这样再build一次,就可以build成功了。
2. 建立Crypto++ SDK
在C:\Program Files\中新建文件夹,取名“CryptoPP”,里面新建文件夹“include”、“lib”,在“lib”中新建文件夹“debug”、“release”。将Crypto++库中的所有头文件复制到“include”文件夹中,再将上面生成的两个cryptlib.lib分别复制到“debug”和“release”中。
三. 基于模式的AES加解密
1、20/13中新建Win32 Console Application工程,建立空的工程。完成后新建文件main.cpp,里面源码如下:
#include "stdafx.h"
#include <aes.h>
#include <Hex.h> // StreamTransformationFilter
#include <modes.h> // CFB_Mode
#include <iostream> // std:cerr
#include <sstream> // std::stringstream
#include <string>
using namespace std;
using namespace CryptoPP;
#pragma comment( lib, "cryptlib.lib" )
std::string ECB_AESEncryptStr(std::string sKey, const char *plainText)
{
std::string outstr;
//填key
SecByteBlock key(AES::MAX_KEYLENGTH);
memset(key,0x30,key.size() );
sKey.size()<=AES::MAX_KEYLENGTH?memcpy(key,sKey.c_str(),sKey.size()):memcpy(key,sKey.c_str(),AES::MAX_KEYLENGTH);
AES::Encryption aesEncryption((byte *)key, AES::MAX_KEYLENGTH);
ECB_Mode_ExternalCipher::Encryption ecbEncryption(aesEncryption);
StreamTransformationFilter ecbEncryptor(ecbEncryption, new HexEncoder(new StringSink(outstr)));
ecbEncryptor.Put((byte *)plainText, strlen(plainText));
ecbEncryptor.MessageEnd();
return outstr;
}
std::string ECB_AESDecryptStr(std::string sKey, const char *cipherText)
{
std::string outstr;
//填key
SecByteBlock key(AES::MAX_KEYLENGTH);
memset(key,0x30,key.size() );
sKey.size()<=AES::MAX_KEYLENGTH?memcpy(key,sKey.c_str(),sKey.size()):memcpy(key,sKey.c_str(),AES::MAX_KEYLENGTH);
ECB_Mode<AES >::Decryption ecbDecryption((byte *)key, AES::MAX_KEYLENGTH);
HexDecoder decryptor(new StreamTransformationFilter(ecbDecryption, new StringSink(outstr)));
decryptor.Put((byte *)cipherText, strlen(cipherText));
decryptor.MessageEnd();
return outstr;
}
std::string CBC_AESEncryptStr(std::string sKey, std::string sIV, const char *plainText)
{
std::string outstr;
//填key
SecByteBlock key(AES::MAX_KEYLENGTH);
memset(key,0x30,key.size() );
sKey.size()<=AES::MAX_KEYLENGTH?memcpy(key,sKey.c_str(),sKey.size()):memcpy(key,sKey.c_str(),AES::MAX_KEYLENGTH);
//填iv
byte iv[AES::BLOCKSIZE];
memset(iv,0x30,AES::BLOCKSIZE);
sIV.size()<=AES::BLOCKSIZE?memcpy(iv,sIV.c_str(),sIV.size()):memcpy(iv,sIV.c_str(),AES::BLOCKSIZE);
AES::Encryption aesEncryption((byte *)key, AES::MAX_KEYLENGTH);
CBC_Mode_ExternalCipher::Encryption cbcEncryption(aesEncryption, iv);
StreamTransformationFilter cbcEncryptor(cbcEncryption, new HexEncoder(new StringSink(outstr)));
cbcEncryptor.Put((byte *)plainText, strlen(plainText));
cbcEncryptor.MessageEnd();
return outstr;
}
std::string CBC_AESDecryptStr(std::string sKey, std::string sIV, const char *cipherText)
{
std::string outstr;
//填key
SecByteBlock key(AES::MAX_KEYLENGTH);
memset(key,0x30,key.size() );
sKey.size()<=AES::MAX_KEYLENGTH?memcpy(key,sKey.c_str(),sKey.size()):memcpy(key,sKey.c_str(),AES::MAX_KEYLENGTH);
//填iv
byte iv[AES::BLOCKSIZE];
memset(iv,0x30,AES::BLOCKSIZE);
sIV.size()<=AES::BLOCKSIZE?memcpy(iv,sIV.c_str(),sIV.size()):memcpy(iv,sIV.c_str(),AES::BLOCKSIZE);
CBC_Mode<AES >::Decryption cbcDecryption((byte *)key, AES::MAX_KEYLENGTH, iv);
HexDecoder decryptor(new StreamTransformationFilter(cbcDecryption, new StringSink(outstr)));
decryptor.Put((byte *)cipherText, strlen(cipherText));
decryptor.MessageEnd();
return outstr;
}
std::string CBC_CTS_AESEncryptStr(std::string sKey, std::string sIV, const char *plainText)
{
std::string outstr;
//填key
SecByteBlock key(AES::MAX_KEYLENGTH);
memset(key,0x30,key.size() );
sKey.size()<=AES::MAX_KEYLENGTH?memcpy(key,sKey.c_str(),sKey.size()):memcpy(key,sKey.c_str(),AES::MAX_KEYLENGTH);
//填iv
byte iv[AES::BLOCKSIZE];
memset(iv,0x30,AES::BLOCKSIZE);
sIV.size()<=AES::BLOCKSIZE?memcpy(iv,sIV.c_str(),sIV.size()):memcpy(iv,sIV.c_str(),AES::BLOCKSIZE);
AES::Encryption aesEncryption((byte *)key, AES::MAX_KEYLENGTH);
CBC_CTS_Mode_ExternalCipher::Encryption cbcctsEncryption(aesEncryption, iv);
StreamTransformationFilter cbcctsEncryptor(cbcctsEncryption, new HexEncoder(new StringSink(outstr)));
cbcctsEncryptor.Put((byte *)plainText, strlen(plainText));
cbcctsEncryptor.MessageEnd();
return outstr;
}
std::string CBC_CTS_AESDecryptStr(std::string sKey, std::string sIV, const char *cipherText)
{
std::string outstr;
//填key
SecByteBlock key(AES::MAX_KEYLENGTH);
memset(key,0x30,key.size() );
sKey.size()<=AES::MAX_KEYLENGTH?memcpy(key,sKey.c_str(),sKey.size()):memcpy(key,sKey.c_str(),AES::MAX_KEYLENGTH);
//填iv
byte iv[AES::BLOCKSIZE];
memset(iv,0x30,AES::BLOCKSIZE);
sIV.size()<=AES::BLOCKSIZE?memcpy(iv,sIV.c_str(),sIV.size()):memcpy(iv,sIV.c_str(),AES::BLOCKSIZE);
CBC_CTS_Mode<AES >::Decryption cbcctsDecryption((byte *)key, AES::MAX_KEYLENGTH, iv);
HexDecoder decryptor(new StreamTransformationFilter(cbcctsDecryption, new StringSink(outstr)));
decryptor.Put((byte *)cipherText, strlen(cipherText));
decryptor.MessageEnd();
return outstr;
}
std::string CFB_AESEncryptStr(std::string sKey, std::string sIV, const char *plainText)
{
std::string outstr;
//填key
SecByteBlock key(AES::MAX_KEYLENGTH);
memset(key,0x30,key.size() );
sKey.size()<=AES::MAX_KEYLENGTH?memcpy(key,sKey.c_str(),sKey.size()):memcpy(key,sKey.c_str(),AES::MAX_KEYLENGTH);
//填iv
byte iv[AES::BLOCKSIZE];
memset(iv,0x30,AES::BLOCKSIZE);
sIV.size()<=AES::BLOCKSIZE?memcpy(iv,sIV.c_str(),sIV.size()):memcpy(iv,sIV.c_str(),AES::BLOCKSIZE);
AES::Encryption aesEncryption((byte *)key, AES::MAX_KEYLENGTH);
CFB_Mode_ExternalCipher::Encryption cfbEncryption(aesEncryption, iv);
StreamTransformationFilter cfbEncryptor(cfbEncryption, new HexEncoder(new StringSink(outstr)));
cfbEncryptor.Put((byte *)plainText, strlen(plainText));
cfbEncryptor.MessageEnd();
return outstr;
}
std::string CFB_AESDecryptStr(std::string sKey, std::string sIV, const char *cipherText)
{
std::string outstr;
//填key
SecByteBlock key(AES::MAX_KEYLENGTH);
memset(key,0x30,key.size() );
sKey.size()<=AES::MAX_KEYLENGTH?memcpy(key,sKey.c_str(),sKey.size()):memcpy(key,sKey.c_str(),AES::MAX_KEYLENGTH);
//填iv
byte iv[AES::BLOCKSIZE];
memset(iv,0x30,AES::BLOCKSIZE);
sIV.size()<=AES::BLOCKSIZE?memcpy(iv,sIV.c_str(),sIV.size()):memcpy(iv,sIV.c_str(),AES::BLOCKSIZE);
CFB_Mode<AES >::Decryption cfbDecryption((byte *)key, AES::MAX_KEYLENGTH, iv);
HexDecoder decryptor(new StreamTransformationFilter(cfbDecryption, new StringSink(outstr)));
decryptor.Put((byte *)cipherText, strlen(cipherText));
decryptor.MessageEnd();
return outstr;
}
std::string OFB_AESEncryptStr(std::string sKey, std::string sIV, const char *plainText)
{
std::string outstr;
//填key
SecByteBlock key(AES::MAX_KEYLENGTH);
memset(key,0x30,key.size() );
sKey.size()<=AES::MAX_KEYLENGTH?memcpy(key,sKey.c_str(),sKey.size()):memcpy(key,sKey.c_str(),AES::MAX_KEYLENGTH);
//填iv
byte iv[AES::BLOCKSIZE];
memset(iv,0x30,AES::BLOCKSIZE);
sIV.size()<=AES::BLOCKSIZE?memcpy(iv,sIV.c_str(),sIV.size()):memcpy(iv,sIV.c_str(),AES::BLOCKSIZE);
AES::Encryption aesEncryption((byte *)key, AES::MAX_KEYLENGTH);
OFB_Mode_ExternalCipher::Encryption ofbEncryption(aesEncryption, iv);
StreamTransformationFilter ofbEncryptor(ofbEncryption, new HexEncoder(new StringSink(outstr)));
ofbEncryptor.Put((byte *)plainText, strlen(plainText));
ofbEncryptor.MessageEnd();
return outstr;
}
std::string OFB_AESDecryptStr(std::string sKey, std::string sIV, const char *cipherText)
{
std::string outstr;
//填key
SecByteBlock key(AES::MAX_KEYLENGTH);
memset(key,0x30,key.size() );
sKey.size()<=AES::MAX_KEYLENGTH?memcpy(key,sKey.c_str(),sKey.size()):memcpy(key,sKey.c_str(),AES::MAX_KEYLENGTH);
//填iv
byte iv[AES::BLOCKSIZE];
memset(iv,0x30,AES::BLOCKSIZE);
sIV.size()<=AES::BLOCKSIZE?memcpy(iv,sIV.c_str(),sIV.size()):memcpy(iv,sIV.c_str(),AES::BLOCKSIZE);
OFB_Mode<AES >::Decryption ofbDecryption((byte *)key, AES::MAX_KEYLENGTH, iv);
HexDecoder decryptor(new StreamTransformationFilter(ofbDecryption, new StringSink(outstr)));
decryptor.Put((byte *)cipherText, strlen(cipherText));
decryptor.MessageEnd();
return outstr;
}
std::string CTR_AESEncryptStr(std::string sKey, std::string sIV, const char *plainText)
{
std::string outstr;
//填key
SecByteBlock key(AES::MAX_KEYLENGTH);
memset(key,0x30,key.size() );
sKey.size()<=AES::MAX_KEYLENGTH?memcpy(key,sKey.c_str(),sKey.size()):memcpy(key,sKey.c_str(),AES::MAX_KEYLENGTH);
//填iv
byte iv[AES::BLOCKSIZE];
memset(iv,0x30,AES::BLOCKSIZE);
sIV.size()<=AES::BLOCKSIZE?memcpy(iv,sIV.c_str(),sIV.size()):memcpy(iv,sIV.c_str(),AES::BLOCKSIZE);
AES::Encryption aesEncryption((byte *)key, AES::MAX_KEYLENGTH);
CTR_Mode_ExternalCipher::Encryption ctrEncryption(aesEncryption, iv);
StreamTransformationFilter ctrEncryptor(ctrEncryption, new HexEncoder(new StringSink(outstr)));
ctrEncryptor.Put((byte *)plainText, strlen(plainText));
ctrEncryptor.MessageEnd();
return outstr;
}
std::string CTR_AESDecryptStr(std::string sKey, std::string sIV, const char *cipherText)
{
std::string outstr;
//填key
SecByteBlock key(AES::MAX_KEYLENGTH);
memset(key,0x30,key.size() );
sKey.size()<=AES::MAX_KEYLENGTH?memcpy(key,sKey.c_str(),sKey.size()):memcpy(key,sKey.c_str(),AES::MAX_KEYLENGTH);
//填iv
byte iv[AES::BLOCKSIZE];
memset(iv,0x30,AES::BLOCKSIZE);
sIV.size()<=AES::BLOCKSIZE?memcpy(iv,sIV.c_str(),sIV.size()):memcpy(iv,sIV.c_str(),AES::BLOCKSIZE);
CTR_Mode<AES >::Decryption ctrDecryption((byte *)key, AES::MAX_KEYLENGTH, iv);
HexDecoder decryptor(new StreamTransformationFilter(ctrDecryption, new StringSink(outstr)));
decryptor.Put((byte *)cipherText, strlen(cipherText));
decryptor.MessageEnd();
return outstr;
}
int _tmain(int argc, _TCHAR* argv[])
{
string plainText = "This Program shows how to use ECB, CBC, CBC_CTS, CFB, OFB and CTR mode of AES in Crypto++.";
string aesKey = "0123456789ABCDEF0123456789ABCDEF";//256bits, also can be 128 bits or 192bits
string aesIV = "ABCDEF0123456789";//128 bits
string ECB_EncryptedText,ECB_DecryptedText,
CBC_EncryptedText,CBC_DecryptedText,
CBC_CTS_EncryptedText,CBC_CTS_DecryptedText,
CFB_EncryptedText,CFB_DecryptedText,
OFB_EncryptedText,OFB_DecryptedText,
CTR_EncryptedText,CTR_DecryptedText;
//ECB
ECB_EncryptedText = ECB_AESEncryptStr(aesKey, plainText.c_str());//ECB加密
ECB_DecryptedText = ECB_AESDecryptStr(aesKey,ECB_EncryptedText.c_str());//ECB解密
//CBC
CBC_EncryptedText = CBC_AESEncryptStr(aesKey, aesIV, plainText.c_str());//CBC加密
CBC_DecryptedText = CBC_AESDecryptStr(aesKey, aesIV, CBC_EncryptedText.c_str());//CBC解密
//CBC_CTS
CBC_CTS_EncryptedText = CBC_CTS_AESEncryptStr(aesKey, aesIV, plainText.c_str());//CBC_CTS加密
CBC_CTS_DecryptedText = CBC_CTS_AESDecryptStr(aesKey, aesIV, CBC_CTS_EncryptedText.c_str());//CBC_CTS解密
//CFB
CFB_EncryptedText = CFB_AESEncryptStr(aesKey, aesIV, plainText.c_str());//CFB加密
CFB_DecryptedText = CFB_AESDecryptStr(aesKey, aesIV, CFB_EncryptedText.c_str());//CFB解密
//OFB
OFB_EncryptedText = OFB_AESEncryptStr(aesKey, aesIV, plainText.c_str());//OFB加密
OFB_DecryptedText = OFB_AESDecryptStr(aesKey, aesIV, OFB_EncryptedText.c_str());//OFB解密
//CTR
CTR_EncryptedText = CTR_AESEncryptStr(aesKey, aesIV, plainText.c_str());//CTR加密
CTR_DecryptedText = CTR_AESDecryptStr(aesKey, aesIV, CTR_EncryptedText.c_str());//CTR解密
cout << "Crypto++ AES-256 加密测试"<< endl;
cout << "分别使用ECB,CBC, CBC_CTR,CFB,OFB和CTR模式"<< endl;
cout << "加密用密钥:" << aesKey << endl;
cout << "密钥长度:" << AES::MAX_KEYLENGTH*8 <<"bits" << endl;
cout << "IV:" << aesIV << endl;
cout << endl;
cout << "ECB测试"<< endl;
cout << "原文:" << plainText << endl;
cout << "密文:" << ECB_EncryptedText << endl;
cout << "恢复明文:" << ECB_DecryptedText << endl << endl;
cout << "CBC测试"<< endl;
cout << "原文:" << plainText << endl;
cout << "密文:" << CBC_EncryptedText << endl;
cout << "恢复明文:" << CBC_DecryptedText << endl << endl;
cout << "CBC_CTS测试"<< endl;
cout << "原文:" << plainText << endl;
cout << "密文:" << CBC_CTS_EncryptedText << endl;
cout << "恢复明文:" << CBC_CTS_DecryptedText << endl << endl;
cout << "CFB测试"<< endl;
cout << "原文:" << plainText << endl;
cout << "密文:" << CFB_EncryptedText << endl;
cout << "恢复明文:" << CFB_DecryptedText << endl << endl;
cout << "OFB测试"<< endl;
cout << "原文:" << plainText << endl;
cout << "密文:" << OFB_EncryptedText << endl;
cout << "恢复明文:" << OFB_DecryptedText << endl << endl;
cout << "CTR测试"<< endl;
cout << "原文:" << plainText << endl;
cout << "密文:" << CTR_EncryptedText << endl;
cout << "恢复明文:" << CTR_DecryptedText << endl << endl;
getchar();
return 0;
}
2 2、设置工程属性
选择工程属性(Alt + F7):
(1)“Configuration Properties”→“C/C++” →“General”,右边的“Additional Include Directories”设置为上面建好的Crypto++ SDK的 Include文件夹,“C:\Program Files\CyptoPP\include”;
(2) “Configuration Properties”→“Linker” →“General”,右边的“Additional Library Directories”设置为上面建好的Crypto++ SDK的Lib\Debug文件夹,“C:\Program Files\CyptoPP\lib\debug”(Release模式下对应着Release文件夹);
(3) “Configuration Properties”→“C/C++” →“Code Generation”,右边的“Runtime Library”设置为“Multi-threaded Debug (/MTd)”(Release模式下对应着“Multi-threaded (/MT)”)
3、
运行程序
(Ctrl + F5)
输出结果如下:
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系:hwhale#tublm.com(使用前将#替换为@)