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
|
using System;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Asn1.Pkcs
{
/**
* a Pkcs#7 signer info object.
*/
public class SignerInfo
: Asn1Encodable
{
private DerInteger version;
private IssuerAndSerialNumber issuerAndSerialNumber;
private AlgorithmIdentifier digAlgorithm;
private Asn1Set authenticatedAttributes;
private AlgorithmIdentifier digEncryptionAlgorithm;
private Asn1OctetString encryptedDigest;
private Asn1Set unauthenticatedAttributes;
public static SignerInfo GetInstance(
object obj)
{
if (obj is SignerInfo)
{
return (SignerInfo) obj;
}
if (obj is Asn1Sequence)
{
return new SignerInfo((Asn1Sequence) obj);
}
throw new ArgumentException("Unknown object in factory: " + Platform.GetTypeName(obj), "obj");
}
public SignerInfo(
DerInteger version,
IssuerAndSerialNumber issuerAndSerialNumber,
AlgorithmIdentifier digAlgorithm,
Asn1Set authenticatedAttributes,
AlgorithmIdentifier digEncryptionAlgorithm,
Asn1OctetString encryptedDigest,
Asn1Set unauthenticatedAttributes)
{
this.version = version;
this.issuerAndSerialNumber = issuerAndSerialNumber;
this.digAlgorithm = digAlgorithm;
this.authenticatedAttributes = authenticatedAttributes;
this.digEncryptionAlgorithm = digEncryptionAlgorithm;
this.encryptedDigest = encryptedDigest;
this.unauthenticatedAttributes = unauthenticatedAttributes;
}
public SignerInfo(
Asn1Sequence seq)
{
var e = seq.GetEnumerator();
e.MoveNext();
version = (DerInteger) e.Current;
e.MoveNext();
issuerAndSerialNumber = IssuerAndSerialNumber.GetInstance(e.Current);
e.MoveNext();
digAlgorithm = AlgorithmIdentifier.GetInstance(e.Current);
e.MoveNext();
var obj = e.Current;
if (obj is Asn1TaggedObject tagged)
{
authenticatedAttributes = Asn1Set.GetInstance(tagged, false);
e.MoveNext();
digEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(e.Current);
}
else
{
authenticatedAttributes = null;
digEncryptionAlgorithm = AlgorithmIdentifier.GetInstance(obj);
}
e.MoveNext();
encryptedDigest = DerOctetString.GetInstance(e.Current);
if (e.MoveNext())
{
unauthenticatedAttributes = Asn1Set.GetInstance((Asn1TaggedObject)e.Current, false);
}
else
{
unauthenticatedAttributes = null;
}
}
public DerInteger Version { get { return version; } }
public IssuerAndSerialNumber IssuerAndSerialNumber { get { return issuerAndSerialNumber; } }
public Asn1Set AuthenticatedAttributes { get { return authenticatedAttributes; } }
public AlgorithmIdentifier DigestAlgorithm { get { return digAlgorithm; } }
public Asn1OctetString EncryptedDigest { get { return encryptedDigest; } }
public AlgorithmIdentifier DigestEncryptionAlgorithm { get { return digEncryptionAlgorithm; } }
public Asn1Set UnauthenticatedAttributes { get { return unauthenticatedAttributes; } }
/**
* Produce an object suitable for an Asn1OutputStream.
* <pre>
* SignerInfo ::= Sequence {
* version Version,
* issuerAndSerialNumber IssuerAndSerialNumber,
* digestAlgorithm DigestAlgorithmIdentifier,
* authenticatedAttributes [0] IMPLICIT Attributes OPTIONAL,
* digestEncryptionAlgorithm DigestEncryptionAlgorithmIdentifier,
* encryptedDigest EncryptedDigest,
* unauthenticatedAttributes [1] IMPLICIT Attributes OPTIONAL
* }
*
* EncryptedDigest ::= OCTET STRING
*
* DigestAlgorithmIdentifier ::= AlgorithmIdentifier
*
* DigestEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
* </pre>
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(version, issuerAndSerialNumber, digAlgorithm);
v.AddOptionalTagged(false, 0, authenticatedAttributes);
v.Add(digEncryptionAlgorithm, encryptedDigest);
v.AddOptionalTagged(false, 1, unauthenticatedAttributes);
return new DerSequence(v);
}
}
}
|
