/**

* EdDSA-Java by str4d
*
* To the extent possible under law, the person who associated CC0 with
* EdDSA-Java has waived all copyright and related or neighboring rights
* to EdDSA-Java.
*
* You should have received a copy of the CC0 legalcode along with this
* work. If not, see <https://creativecommons.org/publicdomain/zero/1.0/>.
*
*/

package net.i2p.crypto.eddsa.math.bigint;

import java.math.BigInteger;

import net.i2p.crypto.eddsa.math.Field; import net.i2p.crypto.eddsa.math.ScalarOps;

public class BigIntegerScalarOps implements ScalarOps {

private final BigInteger l;
private final BigIntegerLittleEndianEncoding enc;

public BigIntegerScalarOps(Field f, BigInteger l) {
    this.l = l;
    enc = new BigIntegerLittleEndianEncoding();
    enc.setField(f);
}

public byte[] reduce(byte[] s) {
    return enc.encode(enc.toBigInteger(s).mod(l));
}

public byte[] multiplyAndAdd(byte[] a, byte[] b, byte[] c) {
    return enc.encode(enc.toBigInteger(a).multiply(enc.toBigInteger(b)).add(enc.toBigInteger(c)).mod(l));
}

}