/**
* 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.spec;
import java.util.Hashtable; import java.util.Locale;
import net.i2p.crypto.eddsa.Utils; import net.i2p.crypto.eddsa.math.Curve; import net.i2p.crypto.eddsa.math.Field; import net.i2p.crypto.eddsa.math.ed25519.Ed25519LittleEndianEncoding; import net.i2p.crypto.eddsa.math.ed25519.Ed25519ScalarOps;
/**
* The named EdDSA curves. * @author str4d * */
public class EdDSANamedCurveTable {
public static final String ED_25519 = "Ed25519"; private static final Field ed25519field = new Field( 256, // b Utils.hexToBytes("edffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff7f"), // q new Ed25519LittleEndianEncoding()); private static final Curve ed25519curve = new Curve(ed25519field, Utils.hexToBytes("a3785913ca4deb75abd841414d0a700098e879777940c78c73fe6f2bee6c0352"), // d ed25519field.fromByteArray(Utils.hexToBytes("b0a00e4a271beec478e42fad0618432fa7d7fb3d99004d2b0bdfc14f8024832b"))); // I private static final EdDSANamedCurveSpec ed25519 = new EdDSANamedCurveSpec( ED_25519, ed25519curve, "SHA-512", // H new Ed25519ScalarOps(), // l ed25519curve.createPoint( // B Utils.hexToBytes("5866666666666666666666666666666666666666666666666666666666666666"), true)); // Precompute tables for B private static final Hashtable<String, EdDSANamedCurveSpec> curves = new Hashtable<String, EdDSANamedCurveSpec>(); public static void defineCurve(EdDSANamedCurveSpec curve) { curves.put(curve.getName().toLowerCase(Locale.ENGLISH), curve); } static void defineCurveAlias(String name, String alias) { EdDSANamedCurveSpec curve = curves.get(name.toLowerCase(Locale.ENGLISH)); if (curve == null) { throw new IllegalStateException(); } curves.put(alias.toLowerCase(Locale.ENGLISH), curve); } static { // RFC 8032 defineCurve(ed25519); } public static EdDSANamedCurveSpec getByName(String name) { return curves.get(name.toLowerCase(Locale.ENGLISH)); }
}