AES Encryption Using Crypto++ .lib in Visual Studio C++

Search…
This is a quick note showing how to compile, link and include a Crypto++ static library (cryptlib.lib), compile and execute a sample code that uses AES CBC to encrypt and decrypt some string data.
Compiling cryptlib.lib
Open the crypto++ solution file cryptest.sln:
Change cryptlib project runtime library to Multi-threaded and change configuration to Release x64:
Build cryptlib project. It will spit out a cryptlib.lib static library:
1
C:\Users\mantvydas\Desktop\cryptopp\x64\Output\Release\cryptlib.lib
Copied!
Including cryptlib.lib in a Project
Create a new VS project and include cryptlib.lib that you've just compiled:
Change project's runtime library to Multi-threaded - it has to use the same runtime library as cryptlib.lib:
Copy over all the header files from the crypto++ project to your project's folder like so:
Include those headers in the project by adding the folder to Include Directories list:
Copy over the below sample code to your main .cpp file and compile:
crypto.cpp
1
// code copy pasted from here https://www.cryptopp.com/w/images/b/bd/AES-CBC-Filter.zip
2
// crypto.cpp : This file contains the 'main' function. Program execution begins and ends there.
3
//
4
​
5
#include "pch.h"
6
#include <iostream>
7
#include "aes.h"
8
#include <Windows.h>
9
​
10
#include "osrng.h"
11
using CryptoPP::AutoSeededRandomPool;
12
​
13
#include <iostream>
14
using std::cout;
15
using std::cerr;
16
using std::endl;
17
​
18
#include <string>
19
using std::string;
20
​
21
#include <cstdlib>
22
using std::exit;
23
​
24
#include "cryptlib.h"
25
using CryptoPP::Exception;
26
​
27
#include "hex.h"
28
using CryptoPP::HexEncoder;
29
using CryptoPP::HexDecoder;
30
​
31
#include "filters.h"
32
using CryptoPP::StringSink;
33
using CryptoPP::StringSource;
34
using CryptoPP::StreamTransformationFilter;
35
​
36
#include "aes.h"
37
using CryptoPP::AES;
38
​
39
#include "ccm.h"
40
using CryptoPP::CBC_Mode;
41
​
42
#include "assert.h"
43
​
44
int main(int argc, char* argv[])
45
{
46
	AutoSeededRandomPool prng;
47
​
48
	byte key[AES::DEFAULT_KEYLENGTH];
49
	prng.GenerateBlock(key, sizeof(key));
50
​
51
	byte iv[AES::BLOCKSIZE];
52
	prng.GenerateBlock(iv, sizeof(iv));
53
​
54
	string plain = "CBC Mode Test";
55
	string cipher, encoded, recovered;
56
​
57
	/*********************************\
58
	\*********************************/
59
​
60
	// Pretty print key
61
	encoded.clear();
62
	StringSource(key, sizeof(key), true,
63
		new HexEncoder(
64
			new StringSink(encoded)
65
		) // HexEncoder
66
	); // StringSource
67
	cout << "key: " << encoded << endl;
68
​
69
	// Pretty print iv
70
	encoded.clear();
71
	StringSource(iv, sizeof(iv), true,
72
		new HexEncoder(
73
			new StringSink(encoded)
74
		) // HexEncoder
75
	); // StringSource
76
	cout << "iv: " << encoded << endl;
77
​
78
	/*********************************\
79
	\*********************************/
80
​
81
	try
82
	{
83
		cout << "plain text: " << plain << endl;
84
​
85
		CBC_Mode< AES >::Encryption e;
86
		e.SetKeyWithIV(key, sizeof(key), iv);
87
​
88
		// The StreamTransformationFilter removes
89
		//  padding as required.
90
		StringSource s(plain, true,
91
			new StreamTransformationFilter(e,
92
				new StringSink(cipher)
93
			) // StreamTransformationFilter
94
		); // StringSource
95
​
96
#if 0
97
		StreamTransformationFilter filter(e);
98
		filter.Put((const byte*)plain.data(), plain.size());
99
		filter.MessageEnd();
100
​
101
		const size_t ret = filter.MaxRetrievable();
102
		cipher.resize(ret);
103
		filter.Get((byte*)cipher.data(), cipher.size());
104
#endif
105
	}
106
	catch (const CryptoPP::Exception& e)
107
	{
108
		cerr << e.what() << endl;
109
		exit(1);
110
	}
111
​
112
	/*********************************\
113
	\*********************************/
114
​
115
	// Pretty print
116
	encoded.clear();
117
	StringSource(cipher, true,
118
		new HexEncoder(
119
			new StringSink(encoded)
120
		) // HexEncoder
121
	); // StringSource
122
	cout << "cipher text: " << encoded << endl;
123
​
124
	/*********************************\
125
	\*********************************/
126
​
127
	try
128
	{
129
		CBC_Mode< AES >::Decryption d;
130
		d.SetKeyWithIV(key, sizeof(key), iv);
131
​
132
		// The StreamTransformationFilter removes
133
		//  padding as required.
134
		StringSource s(cipher, true,
135
			new StreamTransformationFilter(d,
136
				new StringSink(recovered)
137
			) // StreamTransformationFilter
138
		); // StringSource
139
​
140
#if 0
141
		StreamTransformationFilter filter(d);
142
		filter.Put((const byte*)cipher.data(), cipher.size());
143
		filter.MessageEnd();
144
​
145
		const size_t ret = filter.MaxRetrievable();
146
		recovered.resize(ret);
147
		filter.Get((byte*)recovered.data(), recovered.size());
148
#endif
149
​
150
		cout << "recovered text: " << recovered << endl;
151
	}
152
	catch (const CryptoPP::Exception& e)
153
	{
154
		cerr << e.what() << endl;
155
		exit(1);
156
	}
157
​
158
	/*********************************\
159
	\*********************************/
160
​
161
	return 0;
162
}
Copied!
Success:
References
https://www.cryptopp.com/w/images/b/bd/AES-CBC-Filter.zip
Link errors using cryptopp on VS2012 static library, console application and clr program
Stack Overflow
Crypto++ Library 8.6 | Free C++ Class Library of Cryptographic Schemes
reversing, forensics & misc - Previous
Dump Virtual Box Memory
Next - reversing, forensics & misc
Reversing Password Checking Routine
Last modified 2yr ago
Copy link
Contents
Compiling cryptlib.lib
Including cryptlib.lib in a Project
References