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Crypto: Shortcut GroupElement representation conversion

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This commit is contained in:
zzz
2019-02-06 12:35:27 +00:00
parent 3a30f07483
commit 490b81c1a1
1 changed files with 2 additions and 10 deletions
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12
core/java/src/net/i2p/crypto/eddsa/math/GroupElement.java
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@ -483,11 +483,11 @@ public class GroupElement implements Serializable {
* @return A new group element in the given representation. * @return A new group element in the given representation.
*/ */
private GroupElement toRep(final Representation repr) { private GroupElement toRep(final Representation repr) {
if (this.repr == repr)
return this;
switch (this.repr) { switch (this.repr) {
case P2: case P2:
switch (repr) { switch (repr) {
case P2:
return p2(this.curve, this.X, this.Y, this.Z);
default: default:
throw new IllegalArgumentException(); throw new IllegalArgumentException();
} }
@ -495,8 +495,6 @@ public class GroupElement implements Serializable {
switch (repr) { switch (repr) {
case P2: case P2:
return p2(this.curve, this.X, this.Y, this.Z); return p2(this.curve, this.X, this.Y, this.Z);
case P3:
return p3(this.curve, this.X, this.Y, this.Z, this.T);
case CACHED: case CACHED:
return cached(this.curve, this.Y.add(this.X), this.Y.subtract(this.X), this.Z, this.T.multiply(this.curve.get2D())); return cached(this.curve, this.Y.add(this.X), this.Y.subtract(this.X), this.Z, this.T.multiply(this.curve.get2D()));
default: default:
@ -510,22 +508,16 @@ public class GroupElement implements Serializable {
return p3(this.curve, this.X.multiply(this.T), Y.multiply(this.Z), this.Z.multiply(this.T), this.X.multiply(this.Y), false); return p3(this.curve, this.X.multiply(this.T), Y.multiply(this.Z), this.Z.multiply(this.T), this.X.multiply(this.Y), false);
case P3PrecomputedDouble: case P3PrecomputedDouble:
return p3(this.curve, this.X.multiply(this.T), Y.multiply(this.Z), this.Z.multiply(this.T), this.X.multiply(this.Y), true); return p3(this.curve, this.X.multiply(this.T), Y.multiply(this.Z), this.Z.multiply(this.T), this.X.multiply(this.Y), true);
case P1P1:
return p1p1(this.curve, this.X, this.Y, this.Z, this.T);
default: default:
throw new IllegalArgumentException(); throw new IllegalArgumentException();
} }
case PRECOMP: case PRECOMP:
switch (repr) { switch (repr) {
case PRECOMP:
return precomp(this.curve, this.X, this.Y, this.Z);
default: default:
throw new IllegalArgumentException(); throw new IllegalArgumentException();
} }
case CACHED: case CACHED:
switch (repr) { switch (repr) {
case CACHED:
return cached(this.curve, this.X, this.Y, this.Z, this.T);
default: default:
throw new IllegalArgumentException(); throw new IllegalArgumentException();
} }