yaole
55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
package ec256
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import (
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"crypto/elliptic"
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"fmt"
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"math/big"
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"xdx.jelly/xgcl/internal"
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)
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const debug = false
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func printFuncName() {
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if debug {
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fmt.Println("Calling " + internal.GetFuncName())
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}
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}
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var _ elliptic.Curve = SM2CurveParam{}
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// SM2CurveParam CurveParams已经实现了crypto.Curve接口,增加一层把点乘等函数覆盖了。
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type SM2CurveParam struct {
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*elliptic.CurveParams
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}
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type combinedMulter interface {
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CombinedMult(bigX, bigY *big.Int, baseScalar, scalar []byte) (x, y *big.Int)
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}
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// p = 2^256 - 2^224 - 2^96 + 2^64 -1
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var c256 = SM2CurveParam{CurveParams: &elliptic.CurveParams{
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Name: "Curve SM2",
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P: bigFromBase16("FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF"),
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N: bigFromBase16("FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFF7203DF6B21C6052B53BBF40939D54123"),
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B: bigFromBase16("28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCBD414D940E93"),
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Gx: bigFromBase16("32C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1715A4589334C74C7"),
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Gy: bigFromBase16("BC3736A2F4F6779C59BDCEE36B692153D0A9877CC62A474002DF32E52139F0A0"),
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BitSize: 256},
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}
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var Curve256 = c256
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// EC256 returns the sm2-curve
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func EC256() elliptic.Curve {
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return c256
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}
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func CurveSM2() elliptic.Curve {
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return c256
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}
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func (SM2CurveParam) CombinedMult(bigX, bigY *big.Int, baseScalar, scalar []byte) (x, y *big.Int) {
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return CombinedMult(bigX, bigY, baseScalar, scalar)
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}
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