BufferedCipherBase.cs
2.47 KB
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
110
111
112
113
using System;
namespace Org.BouncyCastle.Crypto
{
public abstract class BufferedCipherBase
: IBufferedCipher
{
protected static readonly byte[] EmptyBuffer = new byte[0];
public abstract string AlgorithmName { get; }
public abstract void Init(bool forEncryption, ICipherParameters parameters);
public abstract int GetBlockSize();
public abstract int GetOutputSize(int inputLen);
public abstract int GetUpdateOutputSize(int inputLen);
public abstract byte[] ProcessByte(byte input);
public virtual int ProcessByte(
byte input,
byte[] output,
int outOff)
{
byte[] outBytes = ProcessByte(input);
if (outBytes == null)
return 0;
if (outOff + outBytes.Length > output.Length)
throw new DataLengthException("output buffer too short");
outBytes.CopyTo(output, outOff);
return outBytes.Length;
}
public virtual byte[] ProcessBytes(
byte[] input)
{
return ProcessBytes(input, 0, input.Length);
}
public abstract byte[] ProcessBytes(byte[] input, int inOff, int length);
public virtual int ProcessBytes(
byte[] input,
byte[] output,
int outOff)
{
return ProcessBytes(input, 0, input.Length, output, outOff);
}
public virtual int ProcessBytes(
byte[] input,
int inOff,
int length,
byte[] output,
int outOff)
{
byte[] outBytes = ProcessBytes(input, inOff, length);
if (outBytes == null)
return 0;
if (outOff + outBytes.Length > output.Length)
throw new DataLengthException("output buffer too short");
outBytes.CopyTo(output, outOff);
return outBytes.Length;
}
public abstract byte[] DoFinal();
public virtual byte[] DoFinal(
byte[] input)
{
return DoFinal(input, 0, input.Length);
}
public abstract byte[] DoFinal(
byte[] input,
int inOff,
int length);
public virtual int DoFinal(
byte[] output,
int outOff)
{
byte[] outBytes = DoFinal();
if (outOff + outBytes.Length > output.Length)
throw new DataLengthException("output buffer too short");
outBytes.CopyTo(output, outOff);
return outBytes.Length;
}
public virtual int DoFinal(
byte[] input,
byte[] output,
int outOff)
{
return DoFinal(input, 0, input.Length, output, outOff);
}
public virtual int DoFinal(
byte[] input,
int inOff,
int length,
byte[] output,
int outOff)
{
int len = ProcessBytes(input, inOff, length, output, outOff);
len += DoFinal(output, outOff + len);
return len;
}
public abstract void Reset();
}
}