blob: 56b96d3b3f283704250ba1a6408695588d4203c2 (
plain) (
blame)
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
|
// AesCfb128Decryptor.h
// Declares the cAesCfb128Decryptor class decrypting data using AES CFB-128
#pragma once
#include "polarssl/aes.h"
/** Decrypts data using the AES / CFB 128 algorithm */
class cAesCfb128Decryptor
{
public:
cAesCfb128Decryptor(void);
~cAesCfb128Decryptor();
/** Initializes the decryptor with the specified Key / IV */
void Init(const Byte a_Key[16], const Byte a_IV[16]);
/** Decrypts a_Length bytes of the encrypted data; produces a_Length output bytes */
void ProcessData(Byte * a_DecryptedOut, const Byte * a_EncryptedIn, size_t a_Length);
/** Returns true if the object has been initialized with the Key / IV */
bool IsValid(void) const { return m_IsValid; }
protected:
aes_context m_Aes;
/** The InitialVector, used by the CFB mode decryption */
Byte m_IV[16];
/** Current offset in the m_IV, used by the CFB mode decryption */
size_t m_IVOffset;
/** Indicates whether the object has been initialized with the Key / IV */
bool m_IsValid;
} ;
|
