org.whispersystems.curve25519.java.sc_neg Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of curve25519-java Show documentation

Curve25519 library for Java

The newest version!

package org.whispersystems.curve25519.java;

public class sc_neg {
    static byte[] lminus1 = {(byte) 0xec, (byte) 0xd3, (byte) 0xf5, 0x5c, 0x1a, 0x63, 0x12, 0x58,
            (byte) 0xd6, (byte) 0x9c, (byte) 0xf7, (byte) 0xa2, (byte) 0xde, (byte) 0xf9, (byte) 0xde, 0x14,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10};

    /* b = -a (mod l) */
    public static void sc_neg(byte[] b, byte[] a) {
        byte[] zero = new byte[32];
        sc_muladd.sc_muladd(b, lminus1, a, zero); /* b = (-1)a + 0   (mod l) */
    }
}