BCRSAPrivateKey.java revision e6bf3e8dfa2804891a82075cb469b736321b4827 
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.DERObjectIdentifier;
15import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
16import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
17import org.bouncycastle.crypto.params.RSAKeyParameters;
18import org.bouncycastle.jcajce.provider.asymmetric.util.KeyUtil;
19import org.bouncycastle.jcajce.provider.asymmetric.util.PKCS12BagAttributeCarrierImpl;
20import org.bouncycastle.jce.interfaces.PKCS12BagAttributeCarrier;
21
22public class BCRSAPrivateKey
23    implements RSAPrivateKey, PKCS12BagAttributeCarrier
24{
25    static final long serialVersionUID = 5110188922551353628L;
26
27    private static BigInteger ZERO = BigInteger.valueOf(0);
28
29    protected BigInteger modulus;
30    protected BigInteger privateExponent;
31
32    private transient PKCS12BagAttributeCarrierImpl   attrCarrier = new PKCS12BagAttributeCarrierImpl();
33
34    protected BCRSAPrivateKey()
35    {
36    }
37
38    BCRSAPrivateKey(
39        RSAKeyParameters key)
40    {
41        this.modulus = key.getModulus();
42        this.privateExponent = key.getExponent();
43    }
44
45    BCRSAPrivateKey(
46        RSAPrivateKeySpec spec)
47    {
48        this.modulus = spec.getModulus();
49        this.privateExponent = spec.getPrivateExponent();
50    }
51
52    BCRSAPrivateKey(
53        RSAPrivateKey key)
54    {
55        this.modulus = key.getModulus();
56        this.privateExponent = key.getPrivateExponent();
57    }
58
59    public BigInteger getModulus()
60    {
61        return modulus;
62    }
63
64    public BigInteger getPrivateExponent()
65    {
66        return privateExponent;
67    }
68
69    public String getAlgorithm()
70    {
71        return "RSA";
72    }
73
74    public String getFormat()
75    {
76        return "PKCS#8";
77    }
78
79    public byte[] getEncoded()
80    {
81        // BEGIN android-changed
82        return KeyUtil.getEncodedPrivateKeyInfo(new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE), new org.bouncycastle.asn1.pkcs.RSAPrivateKey(getModulus(), ZERO, getPrivateExponent(), ZERO, ZERO, ZERO, ZERO, ZERO));
83        // END android-changed
84    }
85
86    public boolean equals(Object o)
87    {
88        if (!(o instanceof RSAPrivateKey))
89        {
90            return false;
91        }
92
93        if (o == this)
94        {
95            return true;
96        }
97
98        RSAPrivateKey key = (RSAPrivateKey)o;
99
100        return getModulus().equals(key.getModulus())
101            && getPrivateExponent().equals(key.getPrivateExponent());
102    }
103
104    public int hashCode()
105    {
106        return getModulus().hashCode() ^ getPrivateExponent().hashCode();
107    }
108
109    public void setBagAttribute(
110        ASN1ObjectIdentifier oid,
111        ASN1Encodable attribute)
112    {
113        attrCarrier.setBagAttribute(oid, attribute);
114    }
115
116    public ASN1Encodable getBagAttribute(
117        DERObjectIdentifier oid)
118    {
119        return attrCarrier.getBagAttribute(oid);
120    }
121
122    public Enumeration getBagAttributeKeys()
123    {
124        return attrCarrier.getBagAttributeKeys();
125    }
126
127    private void readObject(
128        ObjectInputStream   in)
129        throws IOException, ClassNotFoundException
130    {
131        in.defaultReadObject();
132
133        this.attrCarrier = new PKCS12BagAttributeCarrierImpl();
134    }
135
136    private void writeObject(
137        ObjectOutputStream  out)
138        throws IOException
139    {
140        out.defaultWriteObject();
141    }
142}
143