blob: 6a6e7e6d1d9293bec83d23e0e8ad905328c52854 (
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
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
173
174
175
176
|
package org.bouncycastle.bcpg;
import java.io.*;
import java.math.BigInteger;
/**
* base class for an RSA Secret (or Private) Key.
*/
public class RSASecretBCPGKey
extends BCPGObject implements BCPGKey
{
MPInteger d;
MPInteger p;
MPInteger q;
MPInteger u;
BigInteger expP, expQ, crt;
/**
*
* @param in
* @throws IOException
*/
public RSASecretBCPGKey(
BCPGInputStream in)
throws IOException
{
this.d = new MPInteger(in);
this.p = new MPInteger(in);
this.q = new MPInteger(in);
this.u = new MPInteger(in);
expP = d.getValue().remainder(p.getValue().subtract(BigInteger.valueOf(1)));
expQ = d.getValue().remainder(q.getValue().subtract(BigInteger.valueOf(1)));
crt = q.getValue().modInverse(p.getValue());
}
/**
*
* @param d
* @param p
* @param q
*/
public RSASecretBCPGKey(
BigInteger d,
BigInteger p,
BigInteger q)
{
//
// pgp requires (p < q)
//
int cmp = p.compareTo(q);
if (cmp >= 0)
{
if (cmp == 0)
{
throw new IllegalArgumentException("p and q cannot be equal");
}
BigInteger tmp = p;
p = q;
q = tmp;
}
this.d = new MPInteger(d);
this.p = new MPInteger(p);
this.q = new MPInteger(q);
this.u = new MPInteger(p.modInverse(q));
expP = d.remainder(p.subtract(BigInteger.valueOf(1)));
expQ = d.remainder(q.subtract(BigInteger.valueOf(1)));
crt = q.modInverse(p);
}
/**
* return the modulus for this key.
*
* @return BigInteger
*/
public BigInteger getModulus()
{
return p.getValue().multiply(q.getValue());
}
/**
* return the private exponent for this key.
*
* @return BigInteger
*/
public BigInteger getPrivateExponent()
{
return d.getValue();
}
/**
* return the prime P
*/
public BigInteger getPrimeP()
{
return p.getValue();
}
/**
* return the prime Q
*/
public BigInteger getPrimeQ()
{
return q.getValue();
}
/**
* return the prime exponent of p
*/
public BigInteger getPrimeExponentP()
{
return expP;
}
/**
* return the prime exponent of q
*/
public BigInteger getPrimeExponentQ()
{
return expQ;
}
/**
* return the crt coefficient
*/
public BigInteger getCrtCoefficient()
{
return crt;
}
/**
* return "PGP"
*
* @see org.bouncycastle.bcpg.BCPGKey#getFormat()
*/
public String getFormat()
{
return "PGP";
}
/**
* return the standard PGP encoding of the key.
*
* @see org.bouncycastle.bcpg.BCPGKey#getEncoded()
*/
public byte[] getEncoded()
{
try
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
BCPGOutputStream pgpOut = new BCPGOutputStream(bOut);
pgpOut.writeObject(this);
return bOut.toByteArray();
}
catch (IOException e)
{
return null;
}
}
public void encode(
BCPGOutputStream out)
throws IOException
{
out.writeObject(d);
out.writeObject(p);
out.writeObject(q);
out.writeObject(u);
}
}
|
