1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/**
* @file AESCrypt.cpp
* @brief AESCrypt class definitions
* @author manzerbredes
* @date 8 Mars 2015
*
* Contain all definitions of AESCrypt class.
*
*/
//----- class -----
#include "AESCrypt.hpp"
//Constructor
AESCrypt::AESCrypt(){
this->hash=HASHCrypt(); //Init hash attribute
}
//Destructor
AESCrypt::~AESCrypt(){
}
//Encrypt string
std::string AESCrypt::encrypt(std::string key, std::string data){
//Generate SHA-256
byte digest[32];
hash.getSHA_256(key, digest, (int)sizeof(digest));
//Contain data encrypted
std::string cipher;
//Use try, catch to be ensure no problems happening
try{
//Create encoder to encrypt data
CryptoPP::ECB_Mode<CryptoPP::AES>::Encryption encoder;
encoder.SetKey( digest, sizeof(digest) );
//Encrypt data with StreamTransformationFilter with NO PADDING
CryptoPP::StringSource ss1(data, true,
new CryptoPP::StreamTransformationFilter( encoder,
new CryptoPP::StringSink( cipher ),
CryptoPP::StreamTransformationFilter::ZEROS_PADDING
)
);
}
catch( CryptoPP::Exception& e )
{
std::cerr << e.what() << std::endl;
exit(EXIT_FAILURE);
}
//return encrypted data
return cipher;
}
//Decrypt string
std::string AESCrypt::decrypt(std::string key, std::string data){
byte digest[32];
hash.getSHA_256(key, digest, (int)sizeof(digest));
//Contain data decrypted
std::string cipher;
//Use try, catch to be ensure no problems happening
try {
//Create decoder to encrypt data
CryptoPP::ECB_Mode< CryptoPP::AES >::Decryption decoder;
decoder.SetKey( digest, sizeof(digest) );
//Decrypt data with StreamTransformationFilter with NO PADDING
CryptoPP::StringSource ss3( data, true,
new CryptoPP::StreamTransformationFilter( decoder,
new CryptoPP::StringSink( cipher ),
CryptoPP::StreamTransformationFilter::NO_PADDING
)
);
}
catch( CryptoPP::Exception& e )
{
std::cerr << e.what() << std::endl;
exit(1);
}
int i=0;
for(i=0;i<cipher.length();i++){
if(cipher[i]=='\0')
break;
}
cipher.erase(i,cipher.length()-1);
//return decrypted data
return cipher;
}
|
