diff options
Diffstat (limited to 'libraries/spongycastle/prov/src/main/jdk1.4/org/spongycastle/jcajce/provider/asymmetric/ecgost/BCECGOST3410PublicKey.java')
| -rw-r--r-- | libraries/spongycastle/prov/src/main/jdk1.4/org/spongycastle/jcajce/provider/asymmetric/ecgost/BCECGOST3410PublicKey.java | 454 |
1 files changed, 454 insertions, 0 deletions
diff --git a/libraries/spongycastle/prov/src/main/jdk1.4/org/spongycastle/jcajce/provider/asymmetric/ecgost/BCECGOST3410PublicKey.java b/libraries/spongycastle/prov/src/main/jdk1.4/org/spongycastle/jcajce/provider/asymmetric/ecgost/BCECGOST3410PublicKey.java new file mode 100644 index 000000000..2256bfd18 --- /dev/null +++ b/libraries/spongycastle/prov/src/main/jdk1.4/org/spongycastle/jcajce/provider/asymmetric/ecgost/BCECGOST3410PublicKey.java @@ -0,0 +1,454 @@ +package org.spongycastle.jcajce.provider.asymmetric.ecgost; + +import java.io.IOException; +import java.io.ObjectInputStream; +import java.io.ObjectOutputStream; +import java.math.BigInteger; + +import org.spongycastle.asn1.ASN1Encodable; +import org.spongycastle.asn1.ASN1ObjectIdentifier; +import org.spongycastle.asn1.ASN1OctetString; +import org.spongycastle.asn1.ASN1Primitive; +import org.spongycastle.asn1.ASN1Sequence; +import org.spongycastle.asn1.DERBitString; +import org.spongycastle.asn1.DERNull; +import org.spongycastle.asn1.DERObjectIdentifier; +import org.spongycastle.asn1.DEROctetString; +import org.spongycastle.asn1.cryptopro.CryptoProObjectIdentifiers; +import org.spongycastle.asn1.cryptopro.ECGOST3410NamedCurves; +import org.spongycastle.asn1.cryptopro.GOST3410PublicKeyAlgParameters; +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.jce.ECGOST3410NamedCurveTable; +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 BCECGOST3410PublicKey + implements ECPublicKey, ECPointEncoder +{ + private String algorithm = "ECGOST3410"; + private boolean withCompression; + + private transient org.spongycastle.math.ec.ECPoint q; + private transient ECParameterSpec ecSpec; + private transient GOST3410PublicKeyAlgParameters gostParams; + + public BCECGOST3410PublicKey( + String algorithm, + BCECGOST3410PublicKey key) + { + this.algorithm = algorithm; + this.q = key.q; + this.ecSpec = key.ecSpec; + this.withCompression = key.withCompression; + this.gostParams = key.gostParams; + } + + public BCECGOST3410PublicKey( + ECPublicKeySpec spec) + { + this.q = spec.getQ(); + + 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 BCECGOST3410PublicKey( + String algorithm, + ECPublicKeyParameters params, + ECParameterSpec spec) + { + ECDomainParameters dp = params.getParameters(); + + this.algorithm = algorithm; + this.q = params.getQ(); + + if (spec == null) + { + this.ecSpec = new ECParameterSpec( + dp.getCurve(), + dp.getG(), + dp.getN(), + dp.getH(), + dp.getSeed()); + } + else + { + this.ecSpec = spec; + } + } + + public BCECGOST3410PublicKey( + String algorithm, + ECPublicKeyParameters params) + { + this.algorithm = algorithm; + this.q = params.getQ(); + this.ecSpec = null; + } + + BCECGOST3410PublicKey( + ECPublicKey key) + { + this.q = key.getQ(); + this.algorithm = key.getAlgorithm(); + this.ecSpec = key.getParameters(); + } + + BCECGOST3410PublicKey( + String algorithm, + ECPoint q, + ECParameterSpec ecSpec) + { + this.algorithm = algorithm; + this.q = q; + this.ecSpec = ecSpec; + } + + BCECGOST3410PublicKey( + SubjectPublicKeyInfo info) + { + populateFromPubKeyInfo(info); + } + + private void populateFromPubKeyInfo(SubjectPublicKeyInfo info) + { + if (info.getAlgorithmId().getObjectId().equals(CryptoProObjectIdentifiers.gostR3410_2001)) + { + DERBitString bits = info.getPublicKeyData(); + ASN1OctetString key; + this.algorithm = "ECGOST3410"; + + try + { + key = (ASN1OctetString)ASN1Primitive.fromByteArray(bits.getBytes()); + } + catch (IOException ex) + { + throw new IllegalArgumentException("error recovering public key"); + } + + byte[] keyEnc = key.getOctets(); + byte[] x = new byte[32]; + byte[] y = new byte[32]; + + for (int i = 0; i != x.length; i++) + { + x[i] = keyEnc[32 - 1 - i]; + } + + for (int i = 0; i != y.length; i++) + { + y[i] = keyEnc[64 - 1 - i]; + } + + gostParams = new GOST3410PublicKeyAlgParameters((ASN1Sequence)info.getAlgorithmId().getParameters()); + + ECNamedCurveParameterSpec spec = ECGOST3410NamedCurveTable.getParameterSpec(ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet())); + + ecSpec = spec; + + this.q = spec.getCurve().createPoint(new BigInteger(1, x), new BigInteger(1, y), false); + } + else + { + 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; + + if (algorithm.equals("ECGOST3410")) + { + ASN1Encodable params = null; + if (gostParams != null) + { + params = gostParams; + } + else if (ecSpec instanceof ECNamedCurveParameterSpec) + { + params = new GOST3410PublicKeyAlgParameters( + ECGOST3410NamedCurves.getOID(((ECNamedCurveParameterSpec)ecSpec).getName()), + CryptoProObjectIdentifiers.gostR3411_94_CryptoProParamSet); + } + 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); + } + + ECPoint qq = this.getQ(); + ECPoint point = qq.getCurve().createPoint(qq.getX().toBigInteger(), qq.getY().toBigInteger(), false); + ASN1OctetString p = ASN1OctetString.getInstance(new X9ECPoint(point)); + + BigInteger bX = this.q.getX().toBigInteger(); + BigInteger bY = this.q.getY().toBigInteger(); + byte[] encKey = new byte[64]; + + byte[] val = bX.toByteArray(); + + for (int i = 0; i != 32; i++) + { + encKey[i] = val[val.length - 1 - i]; + } + + val = bY.toByteArray(); + + for (int i = 0; i != 32; i++) + { + encKey[32 + i] = val[val.length - 1 - i]; + } + + try + { + info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_2001, params), new DEROctetString(encKey)); + } + catch (IOException e) + { + return null; + } + } + else + { + 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 BCECGOST3410PublicKey)) + { + return false; + } + + BCECGOST3410PublicKey other = (BCECGOST3410PublicKey)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))); + } + + private void writeObject( + ObjectOutputStream out) + throws IOException + { + out.defaultWriteObject(); + + out.writeObject(this.getEncoded()); + } +} |