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  • import "crypto/elliptic"

  • 概述

  • 索引

概述

橢圓包實(shí)現(xiàn)了在素?cái)?shù)域上的幾個(gè)標(biāo)準(zhǔn)橢圓曲線。

索引

  • func GenerateKey(curve Curve, rand io.Reader) (priv []byte, x, y *big.Int, err error)

  • func Marshal(curve Curve, x, y *big.Int) []byte

  • func Unmarshal(curve Curve, data []byte) (x, y *big.Int)

  • type Curve

  • func P224() Curve

  • func P256() Curve

  • func P384() Curve

  • func P521() Curve

  • type CurveParams

  • func (curve *CurveParams) Add(x1, y1, x2, y2 *big.Int) (*big.Int, *big.Int)

  • func (curve *CurveParams) Double(x1, y1 *big.Int) (*big.Int, *big.Int)

  • func (curve *CurveParams) IsOnCurve(x, y *big.Int) bool

  • func (curve *CurveParams) Params() *CurveParams

  • func (curve *CurveParams) ScalarBaseMult(k []byte) (*big.Int, *big.Int)

  • func (curve *CurveParams) ScalarMult(Bx, By *big.Int, k []byte) (*big.Int, *big.Int)

包文件

elliptic.go p224.go p256_amd64.go

func GenerateKey

func GenerateKey(curve Curve, rand io.Reader) (priv []byte, x, y *big.Int, err error)

GenerateKey 返回一個(gè)公鑰/私鑰對。私鑰是使用給定的閱讀器生成的,它必須返回隨機(jī)數(shù)據(jù)。

func Marshal

func Marshal(curve Curve, x, y *big.Int) []byte

Marshal 將點(diǎn)轉(zhuǎn)換為 ANSI X9.62 的4.3.6節(jié)中指定的形式。

func Unmarshal

func Unmarshal(curve Curve, data []byte) (x, y *big.Int)

Unmarshal將由Marshal序列化的點(diǎn)轉(zhuǎn)換為x,y對。如果該點(diǎn)不在曲線上,這是一個(gè)錯(cuò)誤。出錯(cuò)時(shí),x =nil。

type Curve

曲線代表a=-3的短型Weierstrass曲線。請參閱http://www.hyperelliptic.org/EFD/g1p/auto-shortw.html

type Curve interface {        // Params返回曲線的參數(shù)。        Params() *CurveParams        // IsOnCurve報(bào)告給定的(x,y)是否在曲線上。        IsOnCurve(x, y *big.Int) bool        // Add返回(x1,y1)和(x2,y2)的和        Add(x1, y1, x2, y2 *big.Int) (x, y *big.Int)        // Double返回 2*(x,y)        Double(x1, y1 *big.Int) (x, y *big.Int)        // ScalarMult返回k*(Bx,By)其中k是大端形式(big-endian)的數(shù)字。        ScalarMult(x1, y1 *big.Int, k []byte) (x, y *big.Int)        // ScalarBaseMult返回 k*G, G是組的基點(diǎn)。        // k是大端形式的整數(shù)。        ScalarBaseMult(k []byte) (x, y *big.Int)}

func P224

func P224() Curve

P224返回一個(gè)實(shí)現(xiàn)P-224的曲線(參見FIPS 186-3,D.2.2節(jié))。

密碼操作使用恒定時(shí)間算法實(shí)現(xiàn)。

func P256

func P256() Curve

P256 返回一個(gè)實(shí)現(xiàn) P-256 的曲線(參見 FIPS 186-3,D.2.3節(jié))

密碼操作使用恒定時(shí)間算法實(shí)現(xiàn)。

func P384

func P384() Curve

P384 返回一個(gè)實(shí)現(xiàn) P-384 的曲線(參見 FIPS 186-3,D.2.4節(jié))

加密操作不使用恒定時(shí)間算法。

func P521

func P521() Curve

P521 返回一個(gè)實(shí)現(xiàn) P-521 的曲線(參見 FIPS 186-3,D.2.5 節(jié))

加密操作不使用恒定時(shí)間算法。

type CurveParams

CurveParams 包含一個(gè)橢圓曲線的參數(shù),并且還提供了一個(gè)通用的,非常量的 Curve 實(shí)現(xiàn)。

type CurveParams struct {
        P       *big.Int // 基礎(chǔ)領(lǐng)域的順序
        N       *big.Int // 基點(diǎn)的順序
        B       *big.Int // 曲線方程的常數(shù)
        Gx, Gy  *big.Int // (x,y)的基點(diǎn)
        BitSize int      // 底層字段的大小
        Name    string   // 曲線的規(guī)范名稱}

func (*CurveParams) Add

func (curve *CurveParams) Add(x1, y1, x2, y2 *big.Int) (*big.Int, *big.Int)

func (*CurveParams) Double

func (curve *CurveParams) Double(x1, y1 *big.Int) (*big.Int, *big.Int)

func (*CurveParams) IsOnCurve

func (curve *CurveParams) IsOnCurve(x, y *big.Int) bool

func (*CurveParams) Params

func (curve *CurveParams) Params() *CurveParams

func (*CurveParams) ScalarBaseMult

func (curve *CurveParams) ScalarBaseMult(k []byte) (*big.Int, *big.Int)

func (*CurveParams) ScalarMult

func (curve *CurveParams) ScalarMult(Bx, By *big.Int, k []byte) (*big.Int, *big.Int)
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