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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
using System;
using System.Collections.Generic;
using System.IO;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Ocsp;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Security.Certificates;
using Org.BouncyCastle.Utilities;
using Org.BouncyCastle.X509;
namespace Org.BouncyCastle.Ocsp
{
public class OcspReqGenerator
{
private List<RequestObject> list = new List<RequestObject>();
private GeneralName requestorName = null;
private X509Extensions requestExtensions = null;
private class RequestObject
{
internal CertificateID certId;
internal X509Extensions extensions;
public RequestObject(
CertificateID certId,
X509Extensions extensions)
{
this.certId = certId;
this.extensions = extensions;
}
public Request ToRequest()
{
return new Request(certId.ToAsn1Object(), extensions);
}
}
/**
* Add a request for the given CertificateID.
*
* @param certId certificate ID of interest
*/
public void AddRequest(
CertificateID certId)
{
list.Add(new RequestObject(certId, null));
}
/**
* Add a request with extensions
*
* @param certId certificate ID of interest
* @param singleRequestExtensions the extensions to attach to the request
*/
public void AddRequest(
CertificateID certId,
X509Extensions singleRequestExtensions)
{
list.Add(new RequestObject(certId, singleRequestExtensions));
}
/**
* Set the requestor name to the passed in X509Principal
*
* @param requestorName a X509Principal representing the requestor name.
*/
public void SetRequestorName(
X509Name requestorName)
{
try
{
this.requestorName = new GeneralName(GeneralName.DirectoryName, requestorName);
}
catch (Exception e)
{
throw new ArgumentException("cannot encode principal", e);
}
}
public void SetRequestorName(
GeneralName requestorName)
{
this.requestorName = requestorName;
}
public void SetRequestExtensions(
X509Extensions requestExtensions)
{
this.requestExtensions = requestExtensions;
}
private OcspReq GenerateRequest(
DerObjectIdentifier signingAlgorithm,
AsymmetricKeyParameter privateKey,
X509Certificate[] chain,
SecureRandom random)
{
Asn1EncodableVector requests = new Asn1EncodableVector();
foreach (RequestObject reqObj in list)
{
try
{
requests.Add(reqObj.ToRequest());
}
catch (Exception e)
{
throw new OcspException("exception creating Request", e);
}
}
TbsRequest tbsReq = new TbsRequest(requestorName, new DerSequence(requests), requestExtensions);
ISigner sig = null;
Signature signature = null;
if (signingAlgorithm != null)
{
if (requestorName == null)
{
throw new OcspException("requestorName must be specified if request is signed.");
}
try
{
sig = SignerUtilities.GetSigner(signingAlgorithm.Id);
if (random != null)
{
sig.Init(true, new ParametersWithRandom(privateKey, random));
}
else
{
sig.Init(true, privateKey);
}
}
catch (Exception e)
{
throw new OcspException("exception creating signature: " + e, e);
}
DerBitString bitSig = null;
try
{
byte[] encoded = tbsReq.GetEncoded();
sig.BlockUpdate(encoded, 0, encoded.Length);
bitSig = new DerBitString(sig.GenerateSignature());
}
catch (Exception e)
{
throw new OcspException("exception processing TBSRequest: " + e, e);
}
AlgorithmIdentifier sigAlgId = new AlgorithmIdentifier(signingAlgorithm, DerNull.Instance);
if (chain != null && chain.Length > 0)
{
Asn1EncodableVector v = new Asn1EncodableVector();
try
{
for (int i = 0; i != chain.Length; i++)
{
v.Add(chain[i].CertificateStructure);
}
}
catch (IOException e)
{
throw new OcspException("error processing certs", e);
}
catch (CertificateEncodingException e)
{
throw new OcspException("error encoding certs", e);
}
signature = new Signature(sigAlgId, bitSig, new DerSequence(v));
}
else
{
signature = new Signature(sigAlgId, bitSig);
}
}
return new OcspReq(new OcspRequest(tbsReq, signature));
}
/**
* Generate an unsigned request
*
* @return the OcspReq
* @throws OcspException
*/
public OcspReq Generate()
{
return GenerateRequest(null, null, null, null);
}
public OcspReq Generate(
string signingAlgorithm,
AsymmetricKeyParameter privateKey,
X509Certificate[] chain)
{
return Generate(signingAlgorithm, privateKey, chain, null);
}
public OcspReq Generate(
string signingAlgorithm,
AsymmetricKeyParameter privateKey,
X509Certificate[] chain,
SecureRandom random)
{
if (signingAlgorithm == null)
throw new ArgumentException("no signing algorithm specified");
try
{
DerObjectIdentifier oid = OcspUtilities.GetAlgorithmOid(signingAlgorithm);
return GenerateRequest(oid, privateKey, chain, random);
}
catch (ArgumentException)
{
throw new ArgumentException("unknown signing algorithm specified: " + signingAlgorithm);
}
}
/**
* Return an IEnumerable of the signature names supported by the generator.
*
* @return an IEnumerable containing recognised names.
*/
public IEnumerable<string> SignatureAlgNames
{
get { return OcspUtilities.AlgNames; }
}
}
}
|
