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Added more curve options to serialization

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This commit is contained in:
nathan 2016-03-10 23:35:13 +01:00
parent b3d4dc431c
commit dd908b63df
1 changed files with 61 additions and 44 deletions
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105
Dorkbox-Util/src/dorkbox/util/serialization/EccPrivateKeySerializer.java
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@ -36,6 +36,9 @@ import java.math.BigInteger;
public
class EccPrivateKeySerializer extends Serializer<ECPrivateKeyParameters> {
private static final byte usesName = (byte) 1;
private static final byte usesOid = (byte) 2;
public static
void write(Output output, ECPrivateKeyParameters key) {
byte[] bytes;
@ -111,70 +114,76 @@ class EccPrivateKeySerializer extends Serializer<ECPrivateKeyParameters> {
// save out if it's a NAMED curve, or a UN-NAMED curve. If it is named, we can do less work.
String curveName = curve.getClass()
.getSimpleName();
if (curveName.endsWith("Curve")) {
if (CustomNamedCurves.getByName(curveName) != null) {
// we use the name instead of serializing the full curve
output.writeInt(usesName, true);
output.writeString(curveName);
return;
}
else if (curveName.endsWith("Curve")) {
String cleanedName = curveName.substring(0, curveName.indexOf("Curve"));
curveName = null;
if (!cleanedName.isEmpty()) {
ASN1ObjectIdentifier oid = CustomNamedCurves.getOID(cleanedName);
if (oid != null) {
// we use the OID (instead of serializing the entire curve)
output.writeBoolean(true);
output.writeInt(usesOid, true);
curveName = oid.getId();
output.writeString(curveName);
return;
}
}
}
// we have to serialize the ENTIRE curve.
if (curveName == null) {
// save out the curve info
BigInteger a = curve.getA()
.toBigInteger();
BigInteger b = curve.getB()
.toBigInteger();
BigInteger order = curve.getOrder();
BigInteger cofactor = curve.getCofactor();
BigInteger q = curve.getField()
.getCharacteristic();
// save out the curve info
BigInteger a = curve.getA()
.toBigInteger();
BigInteger b = curve.getB()
.toBigInteger();
BigInteger order = curve.getOrder();
BigInteger cofactor = curve.getCofactor();
BigInteger q = curve.getField()
.getCharacteristic();
/////////////
bytes = a.toByteArray();
length = bytes.length;
output.writeInt(length, true);
output.writeBytes(bytes, 0, length);
/////////////
bytes = a.toByteArray();
length = bytes.length;
output.writeInt(length, true);
output.writeBytes(bytes, 0, length);
/////////////
bytes = b.toByteArray();
length = bytes.length;
output.writeInt(length, true);
output.writeBytes(bytes, 0, length);
/////////////
bytes = b.toByteArray();
length = bytes.length;
output.writeInt(length, true);
output.writeBytes(bytes, 0, length);
/////////////
bytes = order.toByteArray();
length = bytes.length;
output.writeInt(length, true);
output.writeBytes(bytes, 0, length);
/////////////
bytes = order.toByteArray();
length = bytes.length;
output.writeInt(length, true);
output.writeBytes(bytes, 0, length);
/////////////
bytes = cofactor.toByteArray();
length = bytes.length;
output.writeInt(length, true);
output.writeBytes(bytes, 0, length);
/////////////
bytes = cofactor.toByteArray();
length = bytes.length;
output.writeInt(length, true);
output.writeBytes(bytes, 0, length);
/////////////
bytes = q.toByteArray();
length = bytes.length;
output.writeInt(length, true);
output.writeBytes(bytes, 0, length);
/////////////
bytes = q.toByteArray();
length = bytes.length;
output.writeInt(length, true);
output.writeBytes(bytes, 0, length);
// coordinate system
int coordinateSystem = curve.getCoordinateSystem();
output.writeInt(coordinateSystem, true);
}
// coordinate system
int coordinateSystem = curve.getCoordinateSystem();
output.writeInt(coordinateSystem, true);
}
static
@ -183,14 +192,22 @@ class EccPrivateKeySerializer extends Serializer<ECPrivateKeyParameters> {
int length;
ECCurve curve;
boolean usesOid = input.readBoolean();
int serializatioType = input.readInt(true);
// lookup via name
if (serializatioType == usesName) {
String curveName = input.readString();
X9ECParameters x9Curve = CustomNamedCurves.getByName(curveName);
curve = x9Curve.getCurve();
}
// this means we just lookup the curve via the OID
if (usesOid) {
else if (serializatioType == usesOid) {
String oid = input.readString();
X9ECParameters x9Curve = CustomNamedCurves.getByOID(new ASN1ObjectIdentifier(oid));
curve = x9Curve.getCurve();
}
// we have to read in the entire curve information.
else {
/////////////