diff options
Diffstat (limited to 'libraries/spongycastle/prov/src/main/jdk1.4/org/spongycastle/jcajce/provider/asymmetric/ec/BCECPublicKey.java')
-rw-r--r-- | libraries/spongycastle/prov/src/main/jdk1.4/org/spongycastle/jcajce/provider/asymmetric/ec/BCECPublicKey.java | 376 |
1 files changed, 376 insertions, 0 deletions
diff --git a/libraries/spongycastle/prov/src/main/jdk1.4/org/spongycastle/jcajce/provider/asymmetric/ec/BCECPublicKey.java b/libraries/spongycastle/prov/src/main/jdk1.4/org/spongycastle/jcajce/provider/asymmetric/ec/BCECPublicKey.java new file mode 100644 index 000000000..9b93da86d --- /dev/null +++ b/libraries/spongycastle/prov/src/main/jdk1.4/org/spongycastle/jcajce/provider/asymmetric/ec/BCECPublicKey.java @@ -0,0 +1,376 @@ +package org.spongycastle.jcajce.provider.asymmetric.ec; + +import java.io.IOException; +import java.io.ObjectInputStream; +import java.io.ObjectOutputStream; + +import org.spongycastle.asn1.ASN1ObjectIdentifier; +import org.spongycastle.asn1.ASN1OctetString; +import org.spongycastle.asn1.ASN1Primitive; +import org.spongycastle.asn1.DERBitString; +import org.spongycastle.asn1.DERNull; +import org.spongycastle.asn1.DERObjectIdentifier; +import org.spongycastle.asn1.DEROctetString; +import org.spongycastle.asn1.x509.AlgorithmIdentifier; +import org.spongycastle.asn1.x509.SubjectPublicKeyInfo; +import org.spongycastle.asn1.x9.X962Parameters; +import org.spongycastle.asn1.x9.X9ECParameters; +import org.spongycastle.asn1.x9.X9ECPoint; +import org.spongycastle.asn1.x9.X9IntegerConverter; +import org.spongycastle.asn1.x9.X9ObjectIdentifiers; +import org.spongycastle.crypto.params.ECDomainParameters; +import org.spongycastle.crypto.params.ECPublicKeyParameters; +import org.spongycastle.jcajce.provider.asymmetric.util.ECUtil; +import org.spongycastle.jcajce.provider.asymmetric.util.KeyUtil; +import org.spongycastle.jcajce.provider.config.ProviderConfiguration; +import org.spongycastle.jce.interfaces.ECPointEncoder; +import org.spongycastle.jce.interfaces.ECPublicKey; +import org.spongycastle.jce.provider.BouncyCastleProvider; +import org.spongycastle.jce.spec.ECNamedCurveParameterSpec; +import org.spongycastle.jce.spec.ECParameterSpec; +import org.spongycastle.jce.spec.ECPublicKeySpec; +import org.spongycastle.math.ec.ECCurve; +import org.spongycastle.math.ec.ECPoint; + +public class BCECPublicKey + implements ECPublicKey, ECPointEncoder +{ + private String algorithm = "EC"; + private boolean withCompression; + + private transient org.spongycastle.math.ec.ECPoint q; + private transient ECParameterSpec ecSpec; + private transient ProviderConfiguration configuration; + + public BCECPublicKey( + String algorithm, + BCECPublicKey key + ) + { + this.algorithm = algorithm; + this.q = key.q; + this.ecSpec = key.ecSpec; + this.withCompression = key.withCompression; + this.configuration = key.configuration; + } + + public BCECPublicKey( + String algorithm, + ECPublicKeySpec spec, + ProviderConfiguration configuration) + { + this.algorithm = algorithm; + this.q = spec.getQ(); + this.configuration = configuration; + + if (spec.getParams() != null) + { + this.ecSpec = spec.getParams(); + } + else + { + if (q.getCurve() == null) + { + org.spongycastle.jce.spec.ECParameterSpec s = BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa(); + + q = s.getCurve().createPoint(q.getX().toBigInteger(), q.getY().toBigInteger(), false); + } + this.ecSpec = null; + } + } + + public BCECPublicKey( + String algorithm, + ECPublicKeyParameters params, + ECParameterSpec spec, + ProviderConfiguration configuration) + { + ECDomainParameters dp = params.getParameters(); + + this.algorithm = algorithm; + this.q = params.getQ(); + this.configuration = configuration; + + if (spec == null) + { + this.ecSpec = new ECParameterSpec( + dp.getCurve(), + dp.getG(), + dp.getN(), + dp.getH(), + dp.getSeed()); + } + else + { + this.ecSpec = spec; + } + } + + public BCECPublicKey( + String algorithm, + ECPublicKeyParameters params, + ProviderConfiguration configuration) + { + this.algorithm = algorithm; + this.q = params.getQ(); + this.ecSpec = null; + this.configuration = configuration; + } + + BCECPublicKey( + ECPublicKey key, + ProviderConfiguration configuration) + { + this.q = key.getQ(); + this.algorithm = key.getAlgorithm(); + this.ecSpec = key.getParameters(); + this.configuration = configuration; + } + + BCECPublicKey( + String algorithm, + ECPoint q, + ECParameterSpec ecSpec, + ProviderConfiguration configuration) + { + this.algorithm = algorithm; + this.q = q; + this.ecSpec = ecSpec; + this.configuration = configuration; + } + + BCECPublicKey( + SubjectPublicKeyInfo info, + ProviderConfiguration configuration) + { + this.configuration = configuration; + + populateFromPubKeyInfo(info); + } + + BCECPublicKey( + String algorithm, + SubjectPublicKeyInfo info, + ProviderConfiguration configuration) + { + this.configuration = configuration; + populateFromPubKeyInfo(info); + this.algorithm = algorithm; + } + + private void populateFromPubKeyInfo(SubjectPublicKeyInfo info) + { + X962Parameters params = X962Parameters.getInstance(info.getAlgorithmId().getParameters()); + ECCurve curve; + + if (params.isNamedCurve()) + { + ASN1ObjectIdentifier oid = ASN1ObjectIdentifier.getInstance(params.getParameters()); + X9ECParameters ecP = ECUtil.getNamedCurveByOid(oid); + + ecSpec = new ECNamedCurveParameterSpec( + ECUtil.getCurveName(oid), + ecP.getCurve(), + ecP.getG(), + ecP.getN(), + ecP.getH(), + ecP.getSeed()); + curve = ((ECParameterSpec)ecSpec).getCurve(); + } + else if (params.isImplicitlyCA()) + { + ecSpec = null; + curve = BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa().getCurve(); + } + else + { + X9ECParameters ecP = X9ECParameters.getInstance(params.getParameters()); + ecSpec = new ECParameterSpec( + ecP.getCurve(), + ecP.getG(), + ecP.getN(), + ecP.getH(), + ecP.getSeed()); + curve = ((ECParameterSpec)ecSpec).getCurve(); + } + + DERBitString bits = info.getPublicKeyData(); + byte[] data = bits.getBytes(); + ASN1OctetString key = new DEROctetString(data); + + // + // extra octet string - one of our old certs... + // + if (data[0] == 0x04 && data[1] == data.length - 2 + && (data[2] == 0x02 || data[2] == 0x03)) + { + int qLength = new X9IntegerConverter().getByteLength(curve); + + if (qLength >= data.length - 3) + { + try + { + key = (ASN1OctetString)ASN1Primitive.fromByteArray(data); + } + catch (IOException ex) + { + throw new IllegalArgumentException("error recovering public key"); + } + } + } + + X9ECPoint derQ = new X9ECPoint(curve, key); + + this.q = derQ.getPoint(); + } + + public String getAlgorithm() + { + return algorithm; + } + + public String getFormat() + { + return "X.509"; + } + + public byte[] getEncoded() + { + SubjectPublicKeyInfo info; + + X962Parameters params = null; + if (ecSpec instanceof ECNamedCurveParameterSpec) + { + DERObjectIdentifier curveOid = ECUtil.getNamedCurveOid(((ECNamedCurveParameterSpec)ecSpec).getName()); + + if (curveOid == null) + { + curveOid = new DERObjectIdentifier(((ECNamedCurveParameterSpec)ecSpec).getName()); + } + params = new X962Parameters(curveOid); + } + else if (ecSpec == null) + { + params = new X962Parameters(DERNull.INSTANCE); + } + else + { + ECParameterSpec p = (ECParameterSpec)ecSpec; + + ECCurve curve = p.getG().getCurve(); + ECPoint generator = curve.createPoint(p.getG().getX().toBigInteger(), p.getG().getY().toBigInteger(), withCompression); + + X9ECParameters ecP = new X9ECParameters( + p.getCurve(), generator, p.getN(), p.getH(), p.getSeed()); + + params = new X962Parameters(ecP); + } + + ECCurve curve = this.engineGetQ().getCurve(); + ECPoint point = curve.createPoint(this.getQ().getX().toBigInteger(), this.getQ().getY().toBigInteger(), withCompression); + ASN1OctetString p = ASN1OctetString.getInstance(new X9ECPoint(point)); + + info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params), p.getOctets()); + + return KeyUtil.getEncodedSubjectPublicKeyInfo(info); + } + + public ECParameterSpec getParams() + { + return (ECParameterSpec)ecSpec; + } + + public ECParameterSpec getParameters() + { + return (ECParameterSpec)ecSpec; + } + + public org.spongycastle.math.ec.ECPoint getQ() + { + if (ecSpec == null) + { + if (q instanceof org.spongycastle.math.ec.ECPoint.Fp) + { + return new org.spongycastle.math.ec.ECPoint.Fp(null, q.getX(), q.getY()); + } + else + { + return new org.spongycastle.math.ec.ECPoint.F2m(null, q.getX(), q.getY()); + } + } + + return q; + } + + public org.spongycastle.math.ec.ECPoint engineGetQ() + { + return q; + } + + public String toString() + { + StringBuffer buf = new StringBuffer(); + String nl = System.getProperty("line.separator"); + + buf.append("EC Public Key").append(nl); + buf.append(" X: ").append(this.getQ().getX().toBigInteger().toString(16)).append(nl); + buf.append(" Y: ").append(this.getQ().getY().toBigInteger().toString(16)).append(nl); + + return buf.toString(); + + } + + public void setPointFormat(String style) + { + withCompression = !("UNCOMPRESSED".equalsIgnoreCase(style)); + } + + ECParameterSpec engineGetSpec() + { + if (ecSpec != null) + { + return (ECParameterSpec)ecSpec; + } + + return BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa(); + } + + public boolean equals(Object o) + { + if (!(o instanceof BCECPublicKey)) + { + return false; + } + + BCECPublicKey other = (BCECPublicKey)o; + + return getQ().equals(other.getQ()) && (engineGetSpec().equals(other.engineGetSpec())); + } + + public int hashCode() + { + return getQ().hashCode() ^ engineGetSpec().hashCode(); + } + + private void readObject( + ObjectInputStream in) + throws IOException, ClassNotFoundException + { + in.defaultReadObject(); + + byte[] enc = (byte[])in.readObject(); + + populateFromPubKeyInfo(SubjectPublicKeyInfo.getInstance(ASN1Primitive.fromByteArray(enc))); + + this.configuration = BouncyCastleProvider.CONFIGURATION; + } + + private void writeObject( + ObjectOutputStream out) + throws IOException + { + out.defaultWriteObject(); + + out.writeObject(this.getEncoded()); + } +} |