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github.com/dhrubabasu/circl
math
fp25519
package
Version:
v0.0.0-...-0310684
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Published: Sep 23, 2020
License: BSD-3-Clause
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Imports: 5
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Imported by: 0
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Documentation
Overview
Index
Constants
Variables
Functions
Add(z, x, y)
AddSub(x, y)
Cmov(x, y, n)
Cswap(x, y, n)
Inv(z, x)
InvSqrt(z, x, y)
IsZero(x)
Modp(z)
Mul(z, x, y)
Neg(z, x)
SetOne(x)
Sqr(z, x)
Sub(z, x, y)
ToBytes(b, x)
Types
Source Files
Documentation
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Package fp25519 provides prime field arithmetic over GF(2^255-19).
Constants
func Add(z, x, y *Elt)
func AddSub(x, y *Elt)
func Cmov(x, y *Elt, n uint)
func Cswap(x, y *Elt, n uint)
func Inv(z, x *Elt)
func InvSqrt(z, x, y *Elt) (isQR bool)
func IsZero(x *Elt) bool
func Modp(z *Elt)
func Mul(z, x, y *Elt)
func Neg(z, x *Elt)
func SetOne(x *Elt)
func Sqr(z, x *Elt)
func Sub(z, x, y *Elt)
func ToBytes(b []byte, x *Elt) error
type Elt
Size in bytes of an element.
Add calculates z = x+y mod p.
AddSub calculates (x,y) = (x+y mod p, x-y mod p).
Cmov assigns y to x if n is 1.
Cswap interchanges x and y if n is 1.
Inv calculates z = 1/x mod p.
func InvSqrt(z, x, y *Elt ) (isQR bool )
InvSqrt calculates z = sqrt(x/y) iff x/y is a quadratic-residue, which is
indicated by returning isQR = true. Otherwise, when x/y is a quadratic
non-residue, z will have an undetermined value and isQR = false.
IsZero returns true if x is equal to 0.
Modp ensures that z is between [0,p-1].
Mul calculates z = x*y mod p.
Sqr calculates z = x^2 mod p.
Sub calculates z = x-y mod p.
ToBytes stores in b the little-endian byte representation of x.
Elt is a prime field element.
P returns the prime modulus 2^255-19.
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Source Files