blob: 0019a48eb41b54a5c22cd4dcf1ee7289f8b88aef (
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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
using System;
using System.Collections.Generic;
using System.IO;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Security.Certificates;
using Org.BouncyCastle.Utilities.IO;
namespace Org.BouncyCastle.X509
{
public class X509AttrCertParser
{
private static readonly PemParser PemAttrCertParser = new PemParser("ATTRIBUTE CERTIFICATE");
private Asn1Set sData;
private int sDataObjectCount;
private Stream currentStream;
private X509V2AttributeCertificate ReadDerCertificate(
Asn1InputStream dIn)
{
Asn1Sequence seq = (Asn1Sequence)dIn.ReadObject();
if (seq.Count > 1 && seq[0] is DerObjectIdentifier)
{
if (seq[0].Equals(PkcsObjectIdentifiers.SignedData))
{
sData = SignedData.GetInstance(
Asn1Sequence.GetInstance((Asn1TaggedObject) seq[1], true)).Certificates;
return GetCertificate();
}
}
return new X509V2AttributeCertificate(AttributeCertificate.GetInstance(seq));
}
private X509V2AttributeCertificate GetCertificate()
{
if (sData != null)
{
while (sDataObjectCount < sData.Count)
{
Asn1Encodable ae = sData[sDataObjectCount++];
if (ae.ToAsn1Object() is Asn1TaggedObject t && t.TagNo == 2)
{
return new X509V2AttributeCertificate(
AttributeCertificate.GetInstance(Asn1Sequence.GetInstance(t, false)));
}
}
}
return null;
}
private X509V2AttributeCertificate ReadPemCertificate(
Stream inStream)
{
Asn1Sequence seq = PemAttrCertParser.ReadPemObject(inStream);
return seq == null
? null
: new X509V2AttributeCertificate(AttributeCertificate.GetInstance(seq));
}
/// <summary>
/// Create loading data from byte array.
/// </summary>
/// <param name="input"></param>
public X509V2AttributeCertificate ReadAttrCert(byte[] input)
{
return ReadAttrCert(new MemoryStream(input, false));
}
/// <summary>
/// Create loading data from byte array.
/// </summary>
/// <param name="input"></param>
public IList<X509V2AttributeCertificate> ReadAttrCerts(byte[] input)
{
return ReadAttrCerts(new MemoryStream(input, false));
}
/**
* Generates a certificate object and initializes it with the data
* read from the input stream inStream.
*/
public X509V2AttributeCertificate ReadAttrCert(
Stream inStream)
{
if (inStream == null)
throw new ArgumentNullException("inStream");
if (!inStream.CanRead)
throw new ArgumentException("inStream must be read-able", "inStream");
if (currentStream == null)
{
currentStream = inStream;
sData = null;
sDataObjectCount = 0;
}
else if (currentStream != inStream) // reset if input stream has changed
{
currentStream = inStream;
sData = null;
sDataObjectCount = 0;
}
try
{
if (sData != null)
{
if (sDataObjectCount != sData.Count)
return GetCertificate();
sData = null;
sDataObjectCount = 0;
return null;
}
int tag = inStream.ReadByte();
if (tag < 0)
return null;
if (inStream.CanSeek)
{
inStream.Seek(-1L, SeekOrigin.Current);
}
else
{
PushbackStream pis = new PushbackStream(inStream);
pis.Unread(tag);
inStream = pis;
}
if (tag != 0x30) // assume ascii PEM encoded.
return ReadPemCertificate(inStream);
return ReadDerCertificate(new Asn1InputStream(inStream));
}
catch (Exception e)
{
throw new CertificateException(e.ToString());
}
}
/**
* Returns a (possibly empty) collection view of the certificates
* read from the given input stream inStream.
*/
public IList<X509V2AttributeCertificate> ReadAttrCerts(Stream inStream)
{
var attrCerts = new List<X509V2AttributeCertificate>();
X509V2AttributeCertificate attrCert;
while ((attrCert = ReadAttrCert(inStream)) != null)
{
attrCerts.Add(attrCert);
}
return attrCerts;
}
}
}
|
