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package org.bouncycastle.math.ec.custom.sec;
import java.math.BigInteger;
import org.bouncycastle.math.ec.ECCurve;
import org.bouncycastle.math.ec.ECFieldElement;
import org.bouncycastle.math.ec.ECLookupTable;
import org.bouncycastle.math.ec.ECPoint;
import org.bouncycastle.math.raw.Nat;
import org.bouncycastle.util.encoders.Hex;
public class SecP384R1Curve extends ECCurve.AbstractFp
{
public static final BigInteger q = new BigInteger(1,
Hex.decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFF"));
private static final int SecP384R1_DEFAULT_COORDS = COORD_JACOBIAN;
protected SecP384R1Point infinity;
public SecP384R1Curve()
{
super(q);
this.infinity = new SecP384R1Point(this, null, null);
this.a = fromBigInteger(new BigInteger(1,
Hex.decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFC")));
this.b = fromBigInteger(new BigInteger(1,
Hex.decode("B3312FA7E23EE7E4988E056BE3F82D19181D9C6EFE8141120314088F5013875AC656398D8A2ED19D2A85C8EDD3EC2AEF")));
this.order = new BigInteger(1, Hex.decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973"));
this.cofactor = BigInteger.valueOf(1);
this.coord = SecP384R1_DEFAULT_COORDS;
}
protected ECCurve cloneCurve()
{
return new SecP384R1Curve();
}
public boolean supportsCoordinateSystem(int coord)
{
switch (coord)
{
case COORD_JACOBIAN:
return true;
default:
return false;
}
}
public BigInteger getQ()
{
return q;
}
public int getFieldSize()
{
return q.bitLength();
}
public ECFieldElement fromBigInteger(BigInteger x)
{
return new SecP384R1FieldElement(x);
}
protected ECPoint createRawPoint(ECFieldElement x, ECFieldElement y, boolean withCompression)
{
return new SecP384R1Point(this, x, y, withCompression);
}
protected ECPoint createRawPoint(ECFieldElement x, ECFieldElement y, ECFieldElement[] zs, boolean withCompression)
{
return new SecP384R1Point(this, x, y, zs, withCompression);
}
public ECPoint getInfinity()
{
return infinity;
}
public ECLookupTable createCacheSafeLookupTable(ECPoint[] points, int off, final int len)
{
final int FE_INTS = 12;
final int[] table = new int[len * FE_INTS * 2];
{
int pos = 0;
for (int i = 0; i < len; ++i)
{
ECPoint p = points[off + i];
Nat.copy(FE_INTS, ((SecP384R1FieldElement)p.getRawXCoord()).x, 0, table, pos); pos += FE_INTS;
Nat.copy(FE_INTS, ((SecP384R1FieldElement)p.getRawYCoord()).x, 0, table, pos); pos += FE_INTS;
}
}
return new ECLookupTable()
{
public int getSize()
{
return len;
}
public ECPoint lookup(int index)
{
int[] x = Nat.create(FE_INTS), y = Nat.create(FE_INTS);
int pos = 0;
for (int i = 0; i < len; ++i)
{
int MASK = ((i ^ index) - 1) >> 31;
for (int j = 0; j < FE_INTS; ++j)
{
x[j] ^= table[pos + j] & MASK;
y[j] ^= table[pos + FE_INTS + j] & MASK;
}
pos += (FE_INTS * 2);
}
return createRawPoint(new SecP384R1FieldElement(x), new SecP384R1FieldElement(y), false);
}
};
}
}
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