blob: 9e6f87d9e061533a8f953aef1559d6cb29b2719e (
plain)
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
|
#ifndef BU_CIPHER_H
#define BU_CIPHER_H
#include "bu/filter.h"
namespace Bu
{
template<int iBlockSize>
class Cipher : public Bu::Filter
{
public:
Cipher( Bu::Stream &rNext ) :
Bu::Filter( rNext )
{
}
virtual ~Cipher()
{
}
virtual void start()
{
}
virtual Bu::size stop()
{
return 0;
}
virtual Bu::size read( void *pBuf, Bu::size iBytes )
{
uint32_t i;
if (iBytes%iBlockSize)
{
return 0;
}
iBytes /= iBlockSize;
for (i=0;i<iBytes;i++)
{
void *pSeg = ((char *)pBuf)+(i*iBlockSize);
int iRead = rNext.read( pSeg, iBlockSize );
decipher( pSeg );
}
return iBytes*iBlockSize;
}
virtual Bu::size write( const void *pBuf, Bu::size iBytes )
{
uint32_t i;
if (iBytes%iBlockSize)
{
return 0;
}
iBytes /= iBlockSize;
char buf[iBlockSize];
for (i=0;i<iBytes;i++)
{
memcpy( buf, ((const char *)pBuf)+(i*iBlockSize), 8 );
encipher( buf );
rNext.write( buf, iBlockSize );
}
memset( &buf, 0, iBlockSize );
return iBytes*iBlockSize;
}
using Bu::Stream::read;
using Bu::Stream::write;
protected:
virtual void encipher( void *pData )=0;
virtual void decipher( void *pData )=0;
};
};
#endif
|
