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
|
package org.bouncycastle.cms;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1Set;
import org.bouncycastle.asn1.cms.KEKRecipientInfo;
import org.bouncycastle.asn1.cms.KeyAgreeRecipientInfo;
import org.bouncycastle.asn1.cms.KeyTransRecipientInfo;
import org.bouncycastle.asn1.cms.PasswordRecipientInfo;
import org.bouncycastle.asn1.cms.RecipientInfo;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.operator.DigestCalculator;
class CMSEnvelopedHelper
{
static RecipientInformationStore buildRecipientInformationStore(
ASN1Set recipientInfos, AlgorithmIdentifier messageAlgorithm, CMSSecureReadable secureReadable)
{
return buildRecipientInformationStore(recipientInfos, messageAlgorithm, secureReadable, null);
}
static RecipientInformationStore buildRecipientInformationStore(
ASN1Set recipientInfos, AlgorithmIdentifier messageAlgorithm, CMSSecureReadable secureReadable, AuthAttributesProvider additionalData)
{
List infos = new ArrayList();
for (int i = 0; i != recipientInfos.size(); i++)
{
RecipientInfo info = RecipientInfo.getInstance(recipientInfos.getObjectAt(i));
readRecipientInfo(infos, info, messageAlgorithm, secureReadable, additionalData);
}
return new RecipientInformationStore(infos);
}
private static void readRecipientInfo(
List infos, RecipientInfo info, AlgorithmIdentifier messageAlgorithm, CMSSecureReadable secureReadable, AuthAttributesProvider additionalData)
{
ASN1Encodable recipInfo = info.getInfo();
if (recipInfo instanceof KeyTransRecipientInfo)
{
infos.add(new KeyTransRecipientInformation(
(KeyTransRecipientInfo)recipInfo, messageAlgorithm, secureReadable, additionalData));
}
else if (recipInfo instanceof KEKRecipientInfo)
{
infos.add(new KEKRecipientInformation(
(KEKRecipientInfo)recipInfo, messageAlgorithm, secureReadable, additionalData));
}
else if (recipInfo instanceof KeyAgreeRecipientInfo)
{
KeyAgreeRecipientInformation.readRecipientInfo(infos,
(KeyAgreeRecipientInfo)recipInfo, messageAlgorithm, secureReadable, additionalData);
}
else if (recipInfo instanceof PasswordRecipientInfo)
{
infos.add(new PasswordRecipientInformation(
(PasswordRecipientInfo)recipInfo, messageAlgorithm, secureReadable, additionalData));
}
}
static class CMSDigestAuthenticatedSecureReadable
implements CMSSecureReadable
{
private DigestCalculator digestCalculator;
private CMSReadable readable;
public CMSDigestAuthenticatedSecureReadable(DigestCalculator digestCalculator, CMSReadable readable)
{
this.digestCalculator = digestCalculator;
this.readable = readable;
}
public InputStream getInputStream()
throws IOException, CMSException
{
return new FilterInputStream(readable.getInputStream())
{
public int read()
throws IOException
{
int b = in.read();
if (b >= 0)
{
digestCalculator.getOutputStream().write(b);
}
return b;
}
public int read(byte[] inBuf, int inOff, int inLen)
throws IOException
{
int n = in.read(inBuf, inOff, inLen);
if (n >= 0)
{
digestCalculator.getOutputStream().write(inBuf, inOff, n);
}
return n;
}
};
}
public byte[] getDigest()
{
return digestCalculator.getDigest();
}
}
static class CMSAuthenticatedSecureReadable implements CMSSecureReadable
{
private AlgorithmIdentifier algorithm;
private CMSReadable readable;
CMSAuthenticatedSecureReadable(AlgorithmIdentifier algorithm, CMSReadable readable)
{
this.algorithm = algorithm;
this.readable = readable;
}
public InputStream getInputStream()
throws IOException, CMSException
{
return readable.getInputStream();
}
}
static class CMSEnvelopedSecureReadable implements CMSSecureReadable
{
private AlgorithmIdentifier algorithm;
private CMSReadable readable;
CMSEnvelopedSecureReadable(AlgorithmIdentifier algorithm, CMSReadable readable)
{
this.algorithm = algorithm;
this.readable = readable;
}
public InputStream getInputStream()
throws IOException, CMSException
{
return readable.getInputStream();
}
}
}
|
