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
|
using System;
using Org.BouncyCastle.Asn1.Oiw;
using Org.BouncyCastle.Asn1.X509;
namespace Org.BouncyCastle.Asn1.Pkcs
{
public class RsaesOaepParameters
: Asn1Encodable
{
public static readonly AlgorithmIdentifier DefaultHashAlgorithm = new AlgorithmIdentifier(OiwObjectIdentifiers.IdSha1, DerNull.Instance);
public static readonly AlgorithmIdentifier DefaultMaskGenAlgorithm = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdMgf1, DefaultHashAlgorithm);
[Obsolete("Use 'DefaultMaskGenAlgorithm' instead")]
public static readonly AlgorithmIdentifier DefaultMaskGenFunction = DefaultMaskGenAlgorithm;
public static readonly AlgorithmIdentifier DefaultPSourceAlgorithm = new AlgorithmIdentifier(PkcsObjectIdentifiers.IdPSpecified, new DerOctetString(new byte[0]));
public static RsaesOaepParameters GetInstance(object obj)
{
if (obj == null)
return null;
if (obj is RsaesOaepParameters rsaesOaepParameters)
return rsaesOaepParameters;
#pragma warning disable CS0618 // Type or member is obsolete
return new RsaesOaepParameters(Asn1Sequence.GetInstance(obj));
#pragma warning restore CS0618 // Type or member is obsolete
}
public static RsaesOaepParameters GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit)
{
#pragma warning disable CS0618 // Type or member is obsolete
return new RsaesOaepParameters(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
#pragma warning restore CS0618 // Type or member is obsolete
}
private readonly AlgorithmIdentifier m_hashAlgorithm;
private readonly AlgorithmIdentifier m_maskGenAlgorithm;
private readonly AlgorithmIdentifier m_pSourceAlgorithm;
[Obsolete("Use 'GetInstance' instead")]
public RsaesOaepParameters(Asn1Sequence seq)
{
int count = seq.Count, pos = 0;
if (count < 0 || count > 3)
throw new ArgumentException("Bad sequence size: " + count, nameof(seq));
m_hashAlgorithm = Asn1Utilities.ReadOptionalContextTagged(seq, ref pos, 0, true, AlgorithmIdentifier.GetInstance)
?? DefaultHashAlgorithm;
m_maskGenAlgorithm = Asn1Utilities.ReadOptionalContextTagged(seq, ref pos, 1, true, AlgorithmIdentifier.GetInstance)
?? DefaultMaskGenAlgorithm;
m_pSourceAlgorithm = Asn1Utilities.ReadOptionalContextTagged(seq, ref pos, 2, true, AlgorithmIdentifier.GetInstance)
?? DefaultPSourceAlgorithm;
if (pos != count)
throw new ArgumentException("Unexpected elements in sequence", nameof(seq));
}
/**
* The default version
*/
public RsaesOaepParameters()
: this(DefaultHashAlgorithm, DefaultMaskGenAlgorithm, DefaultPSourceAlgorithm)
{
}
public RsaesOaepParameters(AlgorithmIdentifier hashAlgorithm, AlgorithmIdentifier maskGenAlgorithm)
: this(hashAlgorithm, maskGenAlgorithm, DefaultPSourceAlgorithm)
{
}
public RsaesOaepParameters(AlgorithmIdentifier hashAlgorithm, AlgorithmIdentifier maskGenAlgorithm,
AlgorithmIdentifier pSourceAlgorithm)
{
m_hashAlgorithm = hashAlgorithm;
m_maskGenAlgorithm = maskGenAlgorithm;
m_pSourceAlgorithm = pSourceAlgorithm;
}
public AlgorithmIdentifier HashAlgorithm => m_hashAlgorithm;
public AlgorithmIdentifier MaskGenAlgorithm => m_maskGenAlgorithm;
public AlgorithmIdentifier PSourceAlgorithm => m_pSourceAlgorithm;
/**
* <pre>
* RSAES-OAEP-params ::= SEQUENCE {
* hashAlgorithm [0] OAEP-PSSDigestAlgorithms DEFAULT sha1,
* maskGenAlgorithm [1] PKCS1MGFAlgorithms DEFAULT mgf1SHA1,
* pSourceAlgorithm [2] PKCS1PSourceAlgorithms DEFAULT pSpecifiedEmpty
* }
*
* OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= {
* { OID id-sha1 PARAMETERS NULL }|
* { OID id-sha256 PARAMETERS NULL }|
* { OID id-sha384 PARAMETERS NULL }|
* { OID id-sha512 PARAMETERS NULL },
* ... -- Allows for future expansion --
* }
* PKCS1MGFAlgorithms ALGORITHM-IDENTIFIER ::= {
* { OID id-mgf1 PARAMETERS OAEP-PSSDigestAlgorithms },
* ... -- Allows for future expansion --
* }
* PKCS1PSourceAlgorithms ALGORITHM-IDENTIFIER ::= {
* { OID id-pSpecified PARAMETERS OCTET STRING },
* ... -- Allows for future expansion --
* }
* </pre>
* @return the asn1 primitive representing the parameters.
*/
public override Asn1Object ToAsn1Object()
{
Asn1EncodableVector v = new Asn1EncodableVector(3);
if (!DefaultHashAlgorithm.Equals(m_hashAlgorithm))
{
v.Add(new DerTaggedObject(true, 0, m_hashAlgorithm));
}
if (!DefaultMaskGenAlgorithm.Equals(m_maskGenAlgorithm))
{
v.Add(new DerTaggedObject(true, 1, m_maskGenAlgorithm));
}
if (!DefaultPSourceAlgorithm.Equals(m_pSourceAlgorithm))
{
v.Add(new DerTaggedObject(true, 2, m_pSourceAlgorithm));
}
return new DerSequence(v);
}
}
}
|
