blob: ee92556c793aa9efbbbf8c59378e34103537f292 (
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
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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
using System;
using System.IO;
using Org.BouncyCastle.Utilities.Encoders;
namespace Org.BouncyCastle.Utilities.IO.Pem
{
/**
* A generic PEM writer, based on RFC 1421
*/
public class PemWriter
: IDisposable
{
private const int LineLength = 64;
private readonly TextWriter writer;
private readonly int nlLength;
private char[] buf = new char[LineLength];
/**
* Base constructor.
*
* @param out output stream to use.
*/
public PemWriter(TextWriter writer)
{
this.writer = writer ?? throw new ArgumentNullException(nameof(writer));
this.nlLength = Environment.NewLine.Length;
}
#region IDisposable
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
writer.Dispose();
}
}
#endregion
public TextWriter Writer
{
get { return writer; }
}
/**
* Return the number of bytes or characters required to contain the
* passed in object if it is PEM encoded.
*
* @param obj pem object to be output
* @return an estimate of the number of bytes
*/
public int GetOutputSize(PemObject obj)
{
// BEGIN and END boundaries.
int size = (2 * (obj.Type.Length + 10 + nlLength)) + 6 + 4;
if (obj.Headers.Count > 0)
{
foreach (PemHeader header in obj.Headers)
{
size += header.Name.Length + ": ".Length + header.Value.Length + nlLength;
}
size += nlLength;
}
// base64 encoding
int dataLen = ((obj.Content.Length + 2) / 3) * 4;
size += dataLen + (((dataLen + LineLength - 1) / LineLength) * nlLength);
return size;
}
public void WriteObject(PemObjectGenerator objGen)
{
PemObject obj = objGen.Generate();
WritePreEncapsulationBoundary(obj.Type);
if (obj.Headers.Count > 0)
{
foreach (PemHeader header in obj.Headers)
{
writer.Write(header.Name);
writer.Write(": ");
writer.WriteLine(header.Value);
}
writer.WriteLine();
}
WriteEncoded(obj.Content);
WritePostEncapsulationBoundary(obj.Type);
}
private void WriteEncoded(byte[] bytes)
{
bytes = Base64.Encode(bytes);
for (int i = 0; i < bytes.Length; i += buf.Length)
{
int index = 0;
while (index != buf.Length)
{
if ((i + index) >= bytes.Length)
break;
buf[index] = (char)bytes[i + index];
index++;
}
writer.WriteLine(buf, 0, index);
}
}
private void WritePreEncapsulationBoundary(string type)
{
writer.WriteLine("-----BEGIN " + type + "-----");
}
private void WritePostEncapsulationBoundary(string type)
{
writer.WriteLine("-----END " + type + "-----");
}
}
}
|
