BCRSAPrivateKey.java revision e1142c149e244797ce73b0e7fad40816e447a817 
1package org.bouncycastle.jcajce.provider.asymmetric.rsa;
2
3import java.io.IOException;
4import java.io.ObjectInputStream;
5import java.io.ObjectOutputStream;
6import java.math.BigInteger;
7import java.security.interfaces.RSAPrivateKey;
8import java.security.spec.RSAPrivateKeySpec;
9import java.util.Enumeration;
10
11import org.bouncycastle.asn1.ASN1Encodable;
12import org.bouncycastle.asn1.ASN1ObjectIdentifier;
13import org.bouncycastle.asn1.DERNull;
14import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
15import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
16import org.bouncycastle.crypto.params.RSAKeyParameters;
17import org.bouncycastle.jcajce.provider.asymmetric.util.KeyUtil;
18import org.bouncycastle.jcajce.provider.asymmetric.util.PKCS12BagAttributeCarrierImpl;
19import org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier;
20
21public class BCRSAPrivateKey
22    implements RSAPrivateKey, PKCS12BagAttributeCarrier
23{
24    static final long serialVersionUID = 5110188922551353628L;
25
26    private static BigInteger ZERO = BigInteger.valueOf(0);
27
28    protected BigInteger modulus;
29    protected BigInteger privateExponent;
30
31    private transient PKCS12BagAttributeCarrierImpl   attrCarrier = new PKCS12BagAttributeCarrierImpl();
32
33    protected BCRSAPrivateKey()
34    {
35    }
36
37    BCRSAPrivateKey(
38        RSAKeyParameters key)
39    {
40        this.modulus = key.getModulus();
41        this.privateExponent = key.getExponent();
42    }
43
44    BCRSAPrivateKey(
45        RSAPrivateKeySpec spec)
46    {
47        this.modulus = spec.getModulus();
48        this.privateExponent = spec.getPrivateExponent();
49    }
50
51    BCRSAPrivateKey(
52        RSAPrivateKey key)
53    {
54        this.modulus = key.getModulus();
55        this.privateExponent = key.getPrivateExponent();
56    }
57
58    public BigInteger getModulus()
59    {
60        return modulus;
61    }
62
63    public BigInteger getPrivateExponent()
64    {
65        return privateExponent;
66    }
67
68    public String getAlgorithm()
69    {
70        return "RSA";
71    }
72
73    public String getFormat()
74    {
75        return "PKCS#8";
76    }
77
78    public byte[] getEncoded()
79    {
80        return KeyUtil.getEncodedPrivateKeyInfo(new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE), new org.bouncycastle.asn1.pkcs.RSAPrivateKey(getModulus(), ZERO, getPrivateExponent(), ZERO, ZERO, ZERO, ZERO, ZERO));
81    }
82
83    public boolean equals(Object o)
84    {
85        if (!(o instanceof RSAPrivateKey))
86        {
87            return false;
88        }
89
90        if (o == this)
91        {
92            return true;
93        }
94
95        RSAPrivateKey key = (RSAPrivateKey)o;
96
97        return getModulus().equals(key.getModulus())
98            && getPrivateExponent().equals(key.getPrivateExponent());
99    }
100
101    public int hashCode()
102    {
103        return getModulus().hashCode() ^ getPrivateExponent().hashCode();
104    }
105
106    public void setBagAttribute(
107        ASN1ObjectIdentifier oid,
108        ASN1Encodable attribute)
109    {
110        attrCarrier.setBagAttribute(oid, attribute);
111    }
112
113    public ASN1Encodable getBagAttribute(
114        ASN1ObjectIdentifier oid)
115    {
116        return attrCarrier.getBagAttribute(oid);
117    }
118
119    public Enumeration getBagAttributeKeys()
120    {
121        return attrCarrier.getBagAttributeKeys();
122    }
123
124    private void readObject(
125        ObjectInputStream   in)
126        throws IOException, ClassNotFoundException
127    {
128        in.defaultReadObject();
129
130        this.attrCarrier = new PKCS12BagAttributeCarrierImpl();
131    }
132
133    private void writeObject(
134        ObjectOutputStream  out)
135        throws IOException
136    {
137        out.defaultWriteObject();
138    }
139}
140