RSAES_OAEP_SHA_Decryptor priv(privFile);

string result;

StringSource(ciphertext, true, new HexDecoder(new PK_DecryptorFilter(GlobalRNG(), priv, new StringSink(result))));

return result; [Page]

}

//------------------------

// 定义全局的随机数池

//------------------------

RandomPool & GlobalRNG()

{

static RandomPool randomPool;

return randomPool;

}

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)

正常运行的输出结果为：

Origin Text: Hello World!

Encrypted Text: 79C72A482482EF45111F961772456310792AB735ECF72329ECB26292D2B26374

824E0E35D24A63CB03B867DD2C70B001FD4B2B33FBC984BD229A5226F284B889901817976A680322

9E8351372C5E28E8BEBA2A94E7CF61A8A162F0BA2F3E0C35D26842D92EC4866D25E6BF878743E481

84D9F6FF9BA690F953568D017C02D540

Decrypted Text: Hello World!

如果上面的第(3)步没有设置则会出现以下链接错误：

cryptlib.lib(randpool.obj) : error LNK2005: \"public: __thiscall std::basic_string,class std::allocator >::basic_string,class std::allocator >(char const *)\" ( 0 $basic_string@DU $char_traits@D@std@@V $allocator@D@2@@std@@QAE@PBD@Z) already defined in msvcprtd.lib(MSVCP80D.dll)

说在msvcprtd.lib和MSVCRTD.lib中已经定义过。