Crypto++ in C/C++ on Windows

Download

• Visual Studio
• Crypto++
• Crypto++ PEM
  • Copy all the files in Crypto++ PEM to Crypto++ (skip those files that already existed in Crypto++)

Build Crypto++

1. Open cryptlib.vcxproj with visual studio
   
2. Add pem.h and pem_common.h to the Header Files of the cryptlib project
   
3. Add pem_common.cpp, pem_read.cpp and pem_write.cpp to the Source Files of the cryptlib project
   
4. Choose the preferred configuration, Release/Debug, and platform, Win32/x64, for the project, then right click on cryptlib project and select build
   • Static link library
5. Choose the preferred configuration, Release/Debug, and platform, Win32/x64, for the project, then right click on cryptdll project and select build
   • Dynamic link library

Output directory structure

├─Win32
│  ├─cryptdll
│  │  ├─Debug
│  │  │  └─cryptdll.tlog
│  │  └─Release
│  │      └─cryptdll.tlog
│  ├─cryptest
│  │  └─Debug
│  │      └─cryptest.tlog
│  ├─cryptlib
│  │  ├─Debug
│  │  │  └─cryptlib.tlog
│  │  └─Release
│  │      └─cryptlib.tlog
│  ├─DLL_Output
│  │  ├─Debug
│  │  └─Release
│  └─Output
│      ├─Debug
│      └─Release
└─x64
    ├─cryptdll
    │  ├─Debug
    │  │  └─cryptdll.tlog
    │  └─Release
    │      └─cryptdll.tlog
    ├─cryptlib
    │  ├─Debug
    │  │  └─cryptlib.tlog
    │  └─Release
    │      └─cryptlib.tlog
    ├─DLL_Output
    │  ├─Debug
    │  └─Release
    └─Output
        ├─Debug
        └─Release

Include Crypto++ libraries in Visual Studio (statically)

Project configure

• [專案] -> [屬性] -> [C/C++] -> [一般] -> [其他Include目錄] -> [Add path to the openssl folder which contains all Crypto++ header files]

• [專案] -> [屬性] -> [連結器] -> [其他程式庫目錄] -> [Add path to folder that contains cryptlib.lib according to Debug/Release and Win32/x64]

• [專案] -> [屬性] -> [連結器] -> [輸入] -> [其他相依性] -> [Add cryptlib.lib]

Headers

// Common header files
#include <cryptlib.h>
#include <osrng.h>
#include <modes.h>

Weak namespace

Schemes and algorithms are moved into Weak when their security level is reduced to an unacceptable level by contemporary standards

• ARC4
• ARC4_Base
• MARC4
• MARC4_Base
• MD2
• MD4
• MD5
• PanamaHash
• PanamaMAC
• RSASSA_PKCS1v15_MD2_Signer
• RSASSA_PKCS1v15_MD2_Verifier
• RSASSA_PKCS1v15_MD5_Signer
• RSASSA_PKCS1v15_MD5_Verifier

You must add #define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1 before including a header for a weak or wounded algorithm

// Example to use arc4
#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1
#include <arc4.h>

Example

I've included some common cryptography algorithm examples using cryptopp libraries' high level API. Moreover, I've included the usage of RSA as an example of asymmetric cipher.

References

• RazviOverflow - Compiling Crypto++ in Microsoft Visual Studio 2019/2017 (with Cryptopp-PEM)
• Crypto++ Library API Reference
• Crypto++ PEM Pack
• Crypto++ Visual Studio
• Crypto++ wiki
• Crypto++ Modes of Operation