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
|
package org.spongycastle.asn1.pkcs;
import java.math.BigInteger;
import org.spongycastle.asn1.ASN1EncodableVector;
import org.spongycastle.asn1.ASN1Integer;
import org.spongycastle.asn1.ASN1Object;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.ASN1TaggedObject;
import org.spongycastle.asn1.DERNull;
import org.spongycastle.asn1.DERSequence;
import org.spongycastle.asn1.DERTaggedObject;
import org.spongycastle.asn1.oiw.OIWObjectIdentifiers;
import org.spongycastle.asn1.x509.AlgorithmIdentifier;
public class RSASSAPSSparams
extends ASN1Object
{
private AlgorithmIdentifier hashAlgorithm;
private AlgorithmIdentifier maskGenAlgorithm;
private ASN1Integer saltLength;
private ASN1Integer trailerField;
public final static AlgorithmIdentifier DEFAULT_HASH_ALGORITHM = new AlgorithmIdentifier(OIWObjectIdentifiers.idSHA1, DERNull.INSTANCE);
public final static AlgorithmIdentifier DEFAULT_MASK_GEN_FUNCTION = new AlgorithmIdentifier(PKCSObjectIdentifiers.id_mgf1, DEFAULT_HASH_ALGORITHM);
public final static ASN1Integer DEFAULT_SALT_LENGTH = new ASN1Integer(20);
public final static ASN1Integer DEFAULT_TRAILER_FIELD = new ASN1Integer(1);
public static RSASSAPSSparams getInstance(
Object obj)
{
if (obj instanceof RSASSAPSSparams)
{
return (RSASSAPSSparams)obj;
}
else if (obj != null)
{
return new RSASSAPSSparams(ASN1Sequence.getInstance(obj));
}
return null;
}
/**
* The default version
*/
public RSASSAPSSparams()
{
hashAlgorithm = DEFAULT_HASH_ALGORITHM;
maskGenAlgorithm = DEFAULT_MASK_GEN_FUNCTION;
saltLength = DEFAULT_SALT_LENGTH;
trailerField = DEFAULT_TRAILER_FIELD;
}
public RSASSAPSSparams(
AlgorithmIdentifier hashAlgorithm,
AlgorithmIdentifier maskGenAlgorithm,
ASN1Integer saltLength,
ASN1Integer trailerField)
{
this.hashAlgorithm = hashAlgorithm;
this.maskGenAlgorithm = maskGenAlgorithm;
this.saltLength = saltLength;
this.trailerField = trailerField;
}
private RSASSAPSSparams(
ASN1Sequence seq)
{
hashAlgorithm = DEFAULT_HASH_ALGORITHM;
maskGenAlgorithm = DEFAULT_MASK_GEN_FUNCTION;
saltLength = DEFAULT_SALT_LENGTH;
trailerField = DEFAULT_TRAILER_FIELD;
for (int i = 0; i != seq.size(); i++)
{
ASN1TaggedObject o = (ASN1TaggedObject)seq.getObjectAt(i);
switch (o.getTagNo())
{
case 0:
hashAlgorithm = AlgorithmIdentifier.getInstance(o, true);
break;
case 1:
maskGenAlgorithm = AlgorithmIdentifier.getInstance(o, true);
break;
case 2:
saltLength = ASN1Integer.getInstance(o, true);
break;
case 3:
trailerField = ASN1Integer.getInstance(o, true);
break;
default:
throw new IllegalArgumentException("unknown tag");
}
}
}
public AlgorithmIdentifier getHashAlgorithm()
{
return hashAlgorithm;
}
public AlgorithmIdentifier getMaskGenAlgorithm()
{
return maskGenAlgorithm;
}
public BigInteger getSaltLength()
{
return saltLength.getValue();
}
public BigInteger getTrailerField()
{
return trailerField.getValue();
}
/**
* <pre>
* RSASSA-PSS-params ::= SEQUENCE {
* hashAlgorithm [0] OAEP-PSSDigestAlgorithms DEFAULT sha1,
* maskGenAlgorithm [1] PKCS1MGFAlgorithms DEFAULT mgf1SHA1,
* saltLength [2] INTEGER DEFAULT 20,
* trailerField [3] TrailerField DEFAULT trailerFieldBC
* }
*
* 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 --
* }
*
* TrailerField ::= INTEGER { trailerFieldBC(1) }
* </pre>
* @return the asn1 primitive representing the parameters.
*/
public ASN1Primitive toASN1Primitive()
{
ASN1EncodableVector v = new ASN1EncodableVector();
if (!hashAlgorithm.equals(DEFAULT_HASH_ALGORITHM))
{
v.add(new DERTaggedObject(true, 0, hashAlgorithm));
}
if (!maskGenAlgorithm.equals(DEFAULT_MASK_GEN_FUNCTION))
{
v.add(new DERTaggedObject(true, 1, maskGenAlgorithm));
}
if (!saltLength.equals(DEFAULT_SALT_LENGTH))
{
v.add(new DERTaggedObject(true, 2, saltLength));
}
if (!trailerField.equals(DEFAULT_TRAILER_FIELD))
{
v.add(new DERTaggedObject(true, 3, trailerField));
}
return new DERSequence(v);
}
}
|
