blob: c046d0080918b042a26328f31c18ca598b1390c3 (
plain)
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
|
package org.spongycastle.jcajce.provider.asymmetric.gost;
import java.io.IOException;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidParameterSpecException;
import org.spongycastle.asn1.ASN1Encoding;
import org.spongycastle.asn1.ASN1ObjectIdentifier;
import org.spongycastle.asn1.ASN1Primitive;
import org.spongycastle.asn1.ASN1Sequence;
import org.spongycastle.asn1.cryptopro.GOST3410PublicKeyAlgParameters;
import org.spongycastle.jce.spec.GOST3410ParameterSpec;
import org.spongycastle.jce.spec.GOST3410PublicKeyParameterSetSpec;
public class AlgorithmParametersSpi
extends java.security.AlgorithmParametersSpi
{
GOST3410ParameterSpec currentSpec;
protected boolean isASN1FormatString(String format)
{
return format == null || format.equals("ASN.1");
}
protected AlgorithmParameterSpec engineGetParameterSpec(
Class paramSpec)
throws InvalidParameterSpecException
{
if (paramSpec == null)
{
throw new NullPointerException("argument to getParameterSpec must not be null");
}
return localEngineGetParameterSpec(paramSpec);
}
/**
* Return the X.509 ASN.1 structure GOST3410Parameter.
* <p/>
* <pre>
* GOST3410Parameter ::= SEQUENCE {
* prime INTEGER, -- p
* subprime INTEGER, -- q
* base INTEGER, -- a}
* </pre>
*/
protected byte[] engineGetEncoded()
{
GOST3410PublicKeyAlgParameters gost3410P = new GOST3410PublicKeyAlgParameters(new ASN1ObjectIdentifier(currentSpec.getPublicKeyParamSetOID()), new ASN1ObjectIdentifier(currentSpec.getDigestParamSetOID()), new ASN1ObjectIdentifier(currentSpec.getEncryptionParamSetOID()));
try
{
return gost3410P.getEncoded(ASN1Encoding.DER);
}
catch (IOException e)
{
throw new RuntimeException("Error encoding GOST3410Parameters");
}
}
protected byte[] engineGetEncoded(
String format)
{
if (isASN1FormatString(format) || format.equalsIgnoreCase("X.509"))
{
return engineGetEncoded();
}
return null;
}
protected AlgorithmParameterSpec localEngineGetParameterSpec(
Class paramSpec)
throws InvalidParameterSpecException
{
if (paramSpec == GOST3410PublicKeyParameterSetSpec.class)
{
return currentSpec;
}
throw new InvalidParameterSpecException("unknown parameter spec passed to GOST3410 parameters object.");
}
protected void engineInit(
AlgorithmParameterSpec paramSpec)
throws InvalidParameterSpecException
{
if (!(paramSpec instanceof GOST3410ParameterSpec))
{
throw new InvalidParameterSpecException("GOST3410ParameterSpec required to initialise a GOST3410 algorithm parameters object");
}
this.currentSpec = (GOST3410ParameterSpec)paramSpec;
}
protected void engineInit(
byte[] params)
throws IOException
{
try
{
ASN1Sequence seq = (ASN1Sequence)ASN1Primitive.fromByteArray(params);
this.currentSpec = GOST3410ParameterSpec.fromPublicKeyAlg(
new GOST3410PublicKeyAlgParameters(seq));
}
catch (ClassCastException e)
{
throw new IOException("Not a valid GOST3410 Parameter encoding.");
}
catch (ArrayIndexOutOfBoundsException e)
{
throw new IOException("Not a valid GOST3410 Parameter encoding.");
}
}
protected void engineInit(
byte[] params,
String format)
throws IOException
{
if (isASN1FormatString(format) || format.equalsIgnoreCase("X.509"))
{
engineInit(params);
}
else
{
throw new IOException("Unknown parameter format " + format);
}
}
protected String engineToString()
{
return "GOST3410 Parameters";
}
}
|
