org.mariadb.jdbc.internal.com.send.authentication.ed25519.spec.EdDSANamedCurveTable Maven / Gradle / Ivy
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/**
* 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
* .
*/
package org.mariadb.jdbc.internal.com.send.authentication.ed25519.spec;
import java.util.Hashtable;
import java.util.Locale;
import org.mariadb.jdbc.internal.com.send.authentication.ed25519.Utils;
import org.mariadb.jdbc.internal.com.send.authentication.ed25519.math.Curve;
import org.mariadb.jdbc.internal.com.send.authentication.ed25519.math.Field;
import org.mariadb.jdbc.internal.com.send.authentication.ed25519.math.ed25519.Ed25519LittleEndianEncoding;
import org.mariadb.jdbc.internal.com.send.authentication.ed25519.math.ed25519.ScalarOps;
/**
* 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 ScalarOps(), // l
ed25519curve.createPoint( // B
Utils.hexToBytes("5866666666666666666666666666666666666666666666666666666666666666"),
true)); // Precompute tables for B
private static final Hashtable curves =
new Hashtable();
static {
// RFC 8032
defineCurve(ed25519);
}
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);
}
public static EdDSANamedCurveSpec getByName(String name) {
return curves.get(name.toLowerCase(Locale.ENGLISH));
}
}