diff options
Diffstat (limited to 'prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/dh/BCDHPrivateKey.java')
| -rw-r--r-- | prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/dh/BCDHPrivateKey.java | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/dh/BCDHPrivateKey.java b/prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/dh/BCDHPrivateKey.java new file mode 100644 index 00000000..9949a58d --- /dev/null +++ b/prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/dh/BCDHPrivateKey.java @@ -0,0 +1,213 @@ +package org.spongycastle.jcajce.provider.asymmetric.dh; + +import java.io.IOException; +import java.io.ObjectInputStream; +import java.io.ObjectOutputStream; +import java.math.BigInteger; +import java.util.Enumeration; + +import javax.crypto.interfaces.DHPrivateKey; +import javax.crypto.spec.DHParameterSpec; +import javax.crypto.spec.DHPrivateKeySpec; + +import org.spongycastle.asn1.ASN1Encodable; +import org.spongycastle.asn1.ASN1Encoding; +import org.spongycastle.asn1.ASN1Integer; +import org.spongycastle.asn1.ASN1ObjectIdentifier; +import org.spongycastle.asn1.ASN1Sequence; +import org.spongycastle.asn1.pkcs.DHParameter; +import org.spongycastle.asn1.pkcs.PKCSObjectIdentifiers; +import org.spongycastle.asn1.pkcs.PrivateKeyInfo; +import org.spongycastle.asn1.x509.AlgorithmIdentifier; +import org.spongycastle.asn1.x9.DHDomainParameters; +import org.spongycastle.asn1.x9.X9ObjectIdentifiers; +import org.spongycastle.crypto.params.DHPrivateKeyParameters; +import org.spongycastle.jcajce.provider.asymmetric.util.PKCS12BagAttributeCarrierImpl; +import org.spongycastle.jce.interfaces.PKCS12BagAttributeCarrier; + + +public class BCDHPrivateKey + implements DHPrivateKey, PKCS12BagAttributeCarrier +{ + static final long serialVersionUID = 311058815616901812L; + + private BigInteger x; + + private transient DHParameterSpec dhSpec; + private transient PrivateKeyInfo info; + + private transient PKCS12BagAttributeCarrierImpl attrCarrier = new PKCS12BagAttributeCarrierImpl(); + + protected BCDHPrivateKey() + { + } + + BCDHPrivateKey( + DHPrivateKey key) + { + this.x = key.getX(); + this.dhSpec = key.getParams(); + } + + BCDHPrivateKey( + DHPrivateKeySpec spec) + { + this.x = spec.getX(); + this.dhSpec = new DHParameterSpec(spec.getP(), spec.getG()); + } + + public BCDHPrivateKey( + PrivateKeyInfo info) + throws IOException + { + ASN1Sequence seq = ASN1Sequence.getInstance(info.getPrivateKeyAlgorithm().getParameters()); + ASN1Integer derX = (ASN1Integer)info.parsePrivateKey(); + ASN1ObjectIdentifier id = info.getPrivateKeyAlgorithm().getAlgorithm(); + + this.info = info; + this.x = derX.getValue(); + + if (id.equals(PKCSObjectIdentifiers.dhKeyAgreement)) + { + DHParameter params = DHParameter.getInstance(seq); + + if (params.getL() != null) + { + this.dhSpec = new DHParameterSpec(params.getP(), params.getG(), params.getL().intValue()); + } + else + { + this.dhSpec = new DHParameterSpec(params.getP(), params.getG()); + } + } + else if (id.equals(X9ObjectIdentifiers.dhpublicnumber)) + { + DHDomainParameters params = DHDomainParameters.getInstance(seq); + + this.dhSpec = new DHParameterSpec(params.getP().getValue(), params.getG().getValue()); + } + else + { + throw new IllegalArgumentException("unknown algorithm type: " + id); + } + } + + BCDHPrivateKey( + DHPrivateKeyParameters params) + { + this.x = params.getX(); + this.dhSpec = new DHParameterSpec(params.getParameters().getP(), params.getParameters().getG(), params.getParameters().getL()); + } + + public String getAlgorithm() + { + return "DH"; + } + + /** + * return the encoding format we produce in getEncoded(). + * + * @return the string "PKCS#8" + */ + public String getFormat() + { + return "PKCS#8"; + } + + /** + * Return a PKCS8 representation of the key. The sequence returned + * represents a full PrivateKeyInfo object. + * + * @return a PKCS8 representation of the key. + */ + public byte[] getEncoded() + { + try + { + if (info != null) + { + return info.getEncoded(ASN1Encoding.DER); + } + + PrivateKeyInfo info = new PrivateKeyInfo(new AlgorithmIdentifier(PKCSObjectIdentifiers.dhKeyAgreement, new DHParameter(dhSpec.getP(), dhSpec.getG(), dhSpec.getL()).toASN1Primitive()), new ASN1Integer(getX())); + + return info.getEncoded(ASN1Encoding.DER); + } + catch (Exception e) + { + return null; + } + } + + public DHParameterSpec getParams() + { + return dhSpec; + } + + public BigInteger getX() + { + return x; + } + + public boolean equals( + Object o) + { + if (!(o instanceof DHPrivateKey)) + { + return false; + } + + DHPrivateKey other = (DHPrivateKey)o; + + return this.getX().equals(other.getX()) + && this.getParams().getG().equals(other.getParams().getG()) + && this.getParams().getP().equals(other.getParams().getP()) + && this.getParams().getL() == other.getParams().getL(); + } + + public int hashCode() + { + return this.getX().hashCode() ^ this.getParams().getG().hashCode() + ^ this.getParams().getP().hashCode() ^ this.getParams().getL(); + } + + public void setBagAttribute( + ASN1ObjectIdentifier oid, + ASN1Encodable attribute) + { + attrCarrier.setBagAttribute(oid, attribute); + } + + public ASN1Encodable getBagAttribute( + ASN1ObjectIdentifier oid) + { + return attrCarrier.getBagAttribute(oid); + } + + public Enumeration getBagAttributeKeys() + { + return attrCarrier.getBagAttributeKeys(); + } + + private void readObject( + ObjectInputStream in) + throws IOException, ClassNotFoundException + { + in.defaultReadObject(); + + this.dhSpec = new DHParameterSpec((BigInteger)in.readObject(), (BigInteger)in.readObject(), in.readInt()); + this.info = null; + this.attrCarrier = new PKCS12BagAttributeCarrierImpl(); + } + + private void writeObject( + ObjectOutputStream out) + throws IOException + { + out.defaultWriteObject(); + + out.writeObject(dhSpec.getP()); + out.writeObject(dhSpec.getG()); + out.writeInt(dhSpec.getL()); + } +} |