## ECP **Kind**: global class **this**: {ECP} * [ECP](#ECP) * [new ECP()](#new_ECP_new) * _instance_ * [.is_infinity(1)](#ECP+is_infinity) * [.cswap()](#ECP+cswap) * [.cmove()](#ECP+cmove) * [.select()](#ECP+select) * [.copy(P)](#ECP+copy) * [.neg()](#ECP+neg) * [.inf()](#ECP+inf) * [.setxy(ix, iy)](#ECP+setxy) * [.setxi(ix, s)](#ECP+setxi) * [.setx(ix)](#ECP+setx) * [.affine()](#ECP+affine) * [.getX()](#ECP+getX) * [.getY()](#ECP+getY) * [.getS()](#ECP+getS) * [.getx()](#ECP+getx) * [.gety()](#ECP+gety) * [.getz()](#ECP+getz) * [.toBytes(b)](#ECP+toBytes) * [.toString()](#ECP+toString) ⇒ * [.dbl()](#ECP+dbl) * [.add()](#ECP+add) * [.sub(Q)](#ECP+sub) * [.pinmul(e, bts)](#ECP+pinmul) * [.cfp()](#ECP+cfp) * [.mul(e)](#ECP+mul) * [.mul2(e, Q, f)](#ECP+mul2) * _static_ * [.generator()](#ECP.generator) * [.fromBytes(b)](#ECP.fromBytes) * [.RHS(x)](#ECP.RHS) ### new ECP() Creates an instance of ECP ### ecP.is\_infinity(1) Tests for ECP point equal to infinity **Kind**: instance method of [ECP](#ECP) **this**: {ECP} | Param | Description | | --- | --- | | 1 | if infinity, else returns 0 | ### ecP.cswap() conditional swap of this and Q dependant on dCopy ECP point to another ECP point **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.cmove() conditional move of Q to P dependant on d **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.select() Constant time select from pre-computed table **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.copy(P) Copy ECP point to another ECP point **Kind**: instance method of [ECP](#ECP) **this**: {ECP} | Param | Description | | --- | --- | | P | ECP instance | ### ecP.neg() set this=-this **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.inf() Set ECP to point-at-infinity **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.setxy(ix, iy) set this=(x,y) **Kind**: instance method of [ECP](#ECP) **this**: {ECP} | Param | Description | | --- | --- | | ix | x-value | | iy | y-value | ### ecP.setxi(ix, s) set this=x, where x is ctx.BIG, y is derived from sign s **Kind**: instance method of [ECP](#ECP) **this**: {ECP} | Param | Description | | --- | --- | | ix | x-value | | s | sign to derive y | ### ecP.setx(ix) set this=x, y calculated from curve equation **Kind**: instance method of [ECP](#ECP) **this**: {ECP} | Param | Description | | --- | --- | | ix | x-value | ### ecP.affine() convert this to affine, from (x,y,z) to (x,y) **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.getX() extract affine x as ctx.FP2 **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.getY() extract affine y as ctx.FP2 **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.getS() get sign of Y **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.getx() extract x as ctx.FP **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.gety() extract y as ctx.FP **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.getz() extract z as ctx.FP **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.toBytes(b) convert this to byte arrayextract projective x **Kind**: instance method of [ECP](#ECP) **this**: {ECP} | Param | Description | | --- | --- | | b | byte array output | ### ecP.toString() ⇒ convert this to hex string **Kind**: instance method of [ECP](#ECP) **Returns**: hex string **this**: {ECP} ### ecP.dbl() this+=this **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.add() Adds ECP instances param Q ECP instance **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.sub(Q) Subtracts ECP instance Q from this **Kind**: instance method of [ECP](#ECP) **this**: {ECP} | Param | Description | | --- | --- | | Q | ECP instance | ### ecP.pinmul(e, bts) constant time multiply by small integer of length bts - use ladder **Kind**: instance method of [ECP](#ECP) **this**: {ECP} | Param | Description | | --- | --- | | e | small integer | | bts | e bit length | ### ecP.cfp() multiply this by the curves cofactor **Kind**: instance method of [ECP](#ECP) **this**: {ECP} ### ecP.mul(e) Multiplies an ECP instance P by a BIG, side-channel resistant **Kind**: instance method of [ECP](#ECP) **this**: {ECP} | Param | Description | | --- | --- | | e | BIG number multiplier | ### ecP.mul2(e, Q, f) Return e.this+f.Q **Kind**: instance method of [ECP](#ECP) **this**: {ECP} | Param | Description | | --- | --- | | e | BIG number multiplier | | Q | ECP instance | | f | BIG number multiplier | ### ECP.generator() Set group generator **Kind**: static method of [ECP](#ECP) **this**: {ECP} ### ECP.fromBytes(b) convert from byte array to point **Kind**: static method of [ECP](#ECP) **this**: {ECP} | Param | Description | | --- | --- | | b | input byte array | ### ECP.RHS(x) Calculate RHS of the curve equation **Kind**: static method of [ECP](#ECP) **this**: {ECP} | Param | Description | | --- | --- | | x | x-value |