Uses of Class
net.i2p.crypto.eddsa.math.FieldElement
Package | Description |
---|---|
net.i2p.crypto.eddsa.math |
Data structures that definie curves and fields, and
the mathematical operaions on them.
|
net.i2p.crypto.eddsa.math.bigint |
Low-level, non-optimized implementation using BigIntegers for any curve.
|
net.i2p.crypto.eddsa.math.ed25519 |
Low-level, optimized implementation using Radix $2^{51}$ for Curve 25519.
|
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Uses of FieldElement in net.i2p.crypto.eddsa.math
Fields in net.i2p.crypto.eddsa.math declared as FieldElement Modifier and Type Field Description FieldElement
Field. EIGHT
FieldElement
Field. FIVE
FieldElement
Field. FOUR
FieldElement
Field. ONE
(package private) FieldElement
GroupElement. T
Variable is package private only so that tests run.FieldElement
Field. TWO
(package private) FieldElement
GroupElement. X
Variable is package private only so that tests run.(package private) FieldElement
GroupElement. Y
Variable is package private only so that tests run.(package private) FieldElement
GroupElement. Z
Variable is package private only so that tests run.FieldElement
Field. ZERO
Methods in net.i2p.crypto.eddsa.math that return FieldElement Modifier and Type Method Description abstract FieldElement
FieldElement. add(FieldElement val)
FieldElement
FieldElement. addOne()
abstract FieldElement
FieldElement. cmov(FieldElement val, int b)
abstract FieldElement
Encoding. decode(byte[] in)
Decode a FieldElement from its $(b-1)$-bit encoding.FieldElement
FieldElement. divide(FieldElement val)
FieldElement
Field. fromByteArray(byte[] x)
FieldElement
Curve. get2D()
FieldElement
Curve. getD()
FieldElement
Curve. getI()
FieldElement
Field. getQ()
FieldElement
Field. getQm2()
FieldElement
Field. getQm5d8()
FieldElement
GroupElement. getT()
Gets the $T$ value of the group element.FieldElement
GroupElement. getX()
Gets the $X$ value of the group element.FieldElement
GroupElement. getY()
Gets the $Y$ value of the group element.FieldElement
GroupElement. getZ()
Gets the $Z$ value of the group element.abstract FieldElement
FieldElement. invert()
abstract FieldElement
FieldElement. multiply(FieldElement val)
abstract FieldElement
FieldElement. negate()
abstract FieldElement
FieldElement. pow22523()
abstract FieldElement
FieldElement. square()
abstract FieldElement
FieldElement. squareAndDouble()
abstract FieldElement
FieldElement. subtract(FieldElement val)
FieldElement
FieldElement. subtractOne()
Methods in net.i2p.crypto.eddsa.math with parameters of type FieldElement Modifier and Type Method Description abstract FieldElement
FieldElement. add(FieldElement val)
static GroupElement
GroupElement. cached(Curve curve, FieldElement YpX, FieldElement YmX, FieldElement Z, FieldElement T2d)
Creates a new group element in CACHED representation.abstract FieldElement
FieldElement. cmov(FieldElement val, int b)
FieldElement
FieldElement. divide(FieldElement val)
abstract byte[]
Encoding. encode(FieldElement x)
Encode a FieldElement in its $(b-1)$-bit encoding.abstract boolean
Encoding. isNegative(FieldElement x)
From the Ed25519 paper:
$x$ is negative if the $(b-1)$-bit encoding of $x$ is lexicographically larger than the $(b-1)$-bit encoding of -x.abstract FieldElement
FieldElement. multiply(FieldElement val)
static GroupElement
GroupElement. p1p1(Curve curve, FieldElement X, FieldElement Y, FieldElement Z, FieldElement T)
Creates a new group element in P1P1 representation.static GroupElement
GroupElement. p2(Curve curve, FieldElement X, FieldElement Y, FieldElement Z)
Creates a new group element in P2 representation.static GroupElement
GroupElement. p3(Curve curve, FieldElement X, FieldElement Y, FieldElement Z, FieldElement T)
Creates a new group element in P3 representation, without pre-computation.static GroupElement
GroupElement. p3(Curve curve, FieldElement X, FieldElement Y, FieldElement Z, FieldElement T, boolean precomputeDoubleOnly)
Creates a new group element in P3 representation, potentially with pre-computation.static GroupElement
GroupElement. precomp(Curve curve, FieldElement ypx, FieldElement ymx, FieldElement xy2d)
Creates a new group element in PRECOMP representation.abstract FieldElement
FieldElement. subtract(FieldElement val)
Constructors in net.i2p.crypto.eddsa.math with parameters of type FieldElement Constructor Description Curve(Field f, byte[] d, FieldElement I)
GroupElement(Curve curve, GroupElement.Representation repr, FieldElement X, FieldElement Y, FieldElement Z, FieldElement T)
Creates a group element for a curve, without any pre-computation.GroupElement(Curve curve, GroupElement.Representation repr, FieldElement X, FieldElement Y, FieldElement Z, FieldElement T, boolean precomputeDouble)
Creates a group element for a curve, with optional pre-computation. -
Uses of FieldElement in net.i2p.crypto.eddsa.math.bigint
Subclasses of FieldElement in net.i2p.crypto.eddsa.math.bigint Modifier and Type Class Description class
BigIntegerFieldElement
A particular element of the field \Z/(2^255-19).Methods in net.i2p.crypto.eddsa.math.bigint that return FieldElement Modifier and Type Method Description FieldElement
BigIntegerFieldElement. add(FieldElement val)
FieldElement
BigIntegerFieldElement. addOne()
FieldElement
BigIntegerFieldElement. cmov(FieldElement val, int b)
FieldElement
BigIntegerLittleEndianEncoding. decode(byte[] in)
Decode a FieldElement from its $(b-1)$-bit encoding.FieldElement
BigIntegerFieldElement. divide(BigInteger val)
FieldElement
BigIntegerFieldElement. divide(FieldElement val)
FieldElement
BigIntegerFieldElement. invert()
FieldElement
BigIntegerFieldElement. mod(FieldElement m)
FieldElement
BigIntegerFieldElement. modPow(FieldElement e, FieldElement m)
FieldElement
BigIntegerFieldElement. multiply(FieldElement val)
FieldElement
BigIntegerFieldElement. negate()
FieldElement
BigIntegerFieldElement. pow(FieldElement e)
FieldElement
BigIntegerFieldElement. pow22523()
FieldElement
BigIntegerFieldElement. square()
FieldElement
BigIntegerFieldElement. squareAndDouble()
FieldElement
BigIntegerFieldElement. subtract(FieldElement val)
FieldElement
BigIntegerFieldElement. subtractOne()
Methods in net.i2p.crypto.eddsa.math.bigint with parameters of type FieldElement Modifier and Type Method Description FieldElement
BigIntegerFieldElement. add(FieldElement val)
FieldElement
BigIntegerFieldElement. cmov(FieldElement val, int b)
FieldElement
BigIntegerFieldElement. divide(FieldElement val)
byte[]
BigIntegerLittleEndianEncoding. encode(FieldElement x)
boolean
BigIntegerLittleEndianEncoding. isNegative(FieldElement x)
From the Ed25519 paper:
$x$ is negative if the $(b-1)$-bit encoding of $x$ is lexicographically larger than the $(b-1)$-bit encoding of $-x$.FieldElement
BigIntegerFieldElement. mod(FieldElement m)
FieldElement
BigIntegerFieldElement. modPow(FieldElement e, FieldElement m)
FieldElement
BigIntegerFieldElement. multiply(FieldElement val)
FieldElement
BigIntegerFieldElement. pow(FieldElement e)
FieldElement
BigIntegerFieldElement. subtract(FieldElement val)
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Uses of FieldElement in net.i2p.crypto.eddsa.math.ed25519
Subclasses of FieldElement in net.i2p.crypto.eddsa.math.ed25519 Modifier and Type Class Description class
Ed25519FieldElement
Class to represent a field element of the finite field $p = 2^{255} - 19$ elements.Methods in net.i2p.crypto.eddsa.math.ed25519 that return FieldElement Modifier and Type Method Description FieldElement
Ed25519FieldElement. add(FieldElement val)
$h = f + g$FieldElement
Ed25519FieldElement. cmov(FieldElement val, int b)
Constant-time conditional move.FieldElement
Ed25519LittleEndianEncoding. decode(byte[] in)
Decodes a given field element in its 10 byte $2^{25.5}$ representation.FieldElement
Ed25519FieldElement. invert()
Invert this field element.FieldElement
Ed25519FieldElement. multiply(FieldElement val)
$h = f * g$FieldElement
Ed25519FieldElement. negate()
$h = -f$FieldElement
Ed25519FieldElement. pow22523()
Gets this field element to the power of $(2^{252} - 3)$.FieldElement
Ed25519FieldElement. square()
$h = f * f$FieldElement
Ed25519FieldElement. squareAndDouble()
$h = 2 * f * f$FieldElement
Ed25519FieldElement. subtract(FieldElement val)
$h = f - g$Methods in net.i2p.crypto.eddsa.math.ed25519 with parameters of type FieldElement Modifier and Type Method Description FieldElement
Ed25519FieldElement. add(FieldElement val)
$h = f + g$FieldElement
Ed25519FieldElement. cmov(FieldElement val, int b)
Constant-time conditional move.byte[]
Ed25519LittleEndianEncoding. encode(FieldElement x)
Encodes a given field element in its 32 byte representation.boolean
Ed25519LittleEndianEncoding. isNegative(FieldElement x)
Is the FieldElement negative in this encoding?FieldElement
Ed25519FieldElement. multiply(FieldElement val)
$h = f * g$FieldElement
Ed25519FieldElement. subtract(FieldElement val)
$h = f - g$