Package net.i2p.crypto.eddsa.math
Enum GroupElement.Representation
- All Implemented Interfaces:
Serializable,Comparable<GroupElement.Representation>,java.lang.constant.Constable
- Enclosing class:
- GroupElement
public static enum GroupElement.Representation extends Enum<GroupElement.Representation>
Available representations for a group element.
- P2: Projective representation $(X:Y:Z)$ satisfying $x=X/Z, y=Y/Z$.
- P3: Extended projective representation $(X:Y:Z:T)$ satisfying $x=X/Z, y=Y/Z, XY=ZT$.
- P3PrecomputedDouble: P3 but with dblPrecmp populated.
- P1P1: Completed representation $((X:Z), (Y:T))$ satisfying $x=X/Z, y=Y/T$.
- PRECOMP: Precomputed representation $(y+x, y-x, 2dxy)$.
- CACHED: Cached representation $(Y+X, Y-X, Z, 2dT)$
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Nested Class Summary
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Enum Constant Summary
Enum Constants Enum Constant Description CACHEDCached: $(Y+X,Y-X,Z,2dT)$P1P1Completed ($P \times P$): $((X:Z),(Y:T))$ satisfying $x=X/Z, y=Y/T$P2Projective ($P^2$): $(X:Y:Z)$ satisfying $x=X/Z, y=Y/Z$P3Extended ($P^3$): $(X:Y:Z:T)$ satisfying $x=X/Z, y=Y/Z, XY=ZT$P3PrecomputedDoubleCan only be requested.PRECOMPPrecomputed (Duif): $(y+x,y-x,2dxy)$ -
Method Summary
Modifier and Type Method Description static GroupElement.RepresentationvalueOf(String name)Returns the enum constant of this type with the specified name.static GroupElement.Representation[]values()Returns an array containing the constants of this enum type, in the order they are declared.
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Enum Constant Details
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P2
Projective ($P^2$): $(X:Y:Z)$ satisfying $x=X/Z, y=Y/Z$ -
P3
Extended ($P^3$): $(X:Y:Z:T)$ satisfying $x=X/Z, y=Y/Z, XY=ZT$ -
P3PrecomputedDouble
Can only be requested. Results in P3 representation but also populates dblPrecmp.- Since:
- 0.9.36
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P1P1
Completed ($P \times P$): $((X:Z),(Y:T))$ satisfying $x=X/Z, y=Y/T$ -
PRECOMP
Precomputed (Duif): $(y+x,y-x,2dxy)$ -
CACHED
Cached: $(Y+X,Y-X,Z,2dT)$
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Method Details
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values
Returns an array containing the constants of this enum type, in the order they are declared.- Returns:
- an array containing the constants of this enum type, in the order they are declared
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valueOf
Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)- Parameters:
name- the name of the enum constant to be returned.- Returns:
- the enum constant with the specified name
- Throws:
IllegalArgumentException- if this enum type has no constant with the specified nameNullPointerException- if the argument is null
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