blob: 70219491136b7b7ff657a5be38357263fb96e8d8 (
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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
using System;
using System.IO;
using System.Text;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Cmp;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.Tsp;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Tsp
{
/**
* Base class for an RFC 3161 Time Stamp Response object.
*/
public class TimeStampResponse
{
private TimeStampResp resp;
private TimeStampToken timeStampToken;
public TimeStampResponse(
TimeStampResp resp)
{
this.resp = resp;
if (resp.TimeStampToken != null)
{
timeStampToken = new TimeStampToken(resp.TimeStampToken);
}
}
/**
* Create a TimeStampResponse from a byte array containing an ASN.1 encoding.
*
* @param resp the byte array containing the encoded response.
* @throws TspException if the response is malformed.
* @throws IOException if the byte array doesn't represent an ASN.1 encoding.
*/
public TimeStampResponse(
byte[] resp)
: this(readTimeStampResp(new Asn1InputStream(resp)))
{
}
/**
* Create a TimeStampResponse from an input stream containing an ASN.1 encoding.
*
* @param input the input stream containing the encoded response.
* @throws TspException if the response is malformed.
* @throws IOException if the stream doesn't represent an ASN.1 encoding.
*/
public TimeStampResponse(
Stream input)
: this(readTimeStampResp(new Asn1InputStream(input)))
{
}
private static TimeStampResp readTimeStampResp(
Asn1InputStream input)
{
try
{
return TimeStampResp.GetInstance(input.ReadObject());
}
catch (ArgumentException e)
{
throw new TspException("malformed timestamp response: " + e, e);
}
catch (InvalidCastException e)
{
throw new TspException("malformed timestamp response: " + e, e);
}
}
public int Status
{
get { return resp.Status.Status.IntValue; }
}
public string GetStatusString()
{
if (resp.Status.StatusString == null)
{
return null;
}
StringBuilder statusStringBuf = new StringBuilder();
PkiFreeText text = resp.Status.StatusString;
for (int i = 0; i != text.Count; i++)
{
statusStringBuf.Append(text[i].GetString());
}
return statusStringBuf.ToString();
}
public PkiFailureInfo GetFailInfo()
{
if (resp.Status.FailInfo == null)
{
return null;
}
return new PkiFailureInfo(resp.Status.FailInfo);
}
public TimeStampToken TimeStampToken
{
get { return timeStampToken; }
}
/**
* Check this response against to see if it a well formed response for
* the passed in request. Validation will include checking the time stamp
* token if the response status is GRANTED or GRANTED_WITH_MODS.
*
* @param request the request to be checked against
* @throws TspException if the request can not match this response.
*/
public void Validate(
TimeStampRequest request)
{
TimeStampToken tok = this.TimeStampToken;
if (tok != null)
{
TimeStampTokenInfo tstInfo = tok.TimeStampInfo;
if (request.Nonce != null && !request.Nonce.Equals(tstInfo.Nonce))
{
throw new TspValidationException("response contains wrong nonce value.");
}
if (this.Status != (int) PkiStatus.Granted && this.Status != (int) PkiStatus.GrantedWithMods)
{
throw new TspValidationException("time stamp token found in failed request.");
}
if (!Arrays.FixedTimeEquals(request.GetMessageImprintDigest(), tstInfo.GetMessageImprintDigest()))
{
throw new TspValidationException("response for different message imprint digest.");
}
if (!tstInfo.MessageImprintAlgOid.Equals(request.MessageImprintAlgOid))
{
throw new TspValidationException("response for different message imprint algorithm.");
}
Asn1.Cms.Attribute scV1 = tok.SignedAttributes[PkcsObjectIdentifiers.IdAASigningCertificate];
Asn1.Cms.Attribute scV2 = tok.SignedAttributes[PkcsObjectIdentifiers.IdAASigningCertificateV2];
if (scV1 == null && scV2 == null)
{
throw new TspValidationException("no signing certificate attribute present.");
}
if (scV1 != null && scV2 != null)
{
/*
* RFC 5035 5.4. If both attributes exist in a single message,
* they are independently evaluated.
*/
}
if (request.ReqPolicy != null && !request.ReqPolicy.Equals(tstInfo.Policy))
{
throw new TspValidationException("TSA policy wrong for request.");
}
}
else if (this.Status == (int) PkiStatus.Granted || this.Status == (int) PkiStatus.GrantedWithMods)
{
throw new TspValidationException("no time stamp token found and one expected.");
}
}
/**
* return the ASN.1 encoded representation of this object.
*/
public byte[] GetEncoded()
{
return resp.GetEncoded();
}
}
}
|
