package kgc

import (
	"crypto/elliptic"
	"fmt"
)

// Certificateless_Sign(prikey, pubkey, msg, ID)
func Certificateless_Sign(pri_key, pub_key, msg []byte, id string) (signature []byte, err error) {

	curve := elliptic.P256()
	s := BytesToBig(pri_key)
	x, y := bytes_halve(pub_key)
	Qx := BytesToBig(x)
	Qy := BytesToBig(y)
	//fmt.Println("公钥第一部分长度为：", len(x))
	//fmt.Println("公钥第二部分长度为：", len(y))

	ID := []byte(id)

	PK_pub := "7196e9722d561a0fea21485fc16140096cc9b88f7174aec7508f14a7b85b61ba299292c726367bbcbf8f00b977849164bf9d3fd6260e55dd6498517bc0dec541"
	pk1, pk2 := string_halve(PK_pub)
	//fmt.Println("KGC公钥第二部分长度为：", len([]byte(pk1)))
	//fmt.Println("KGC公钥第二部分长度为：", len([]byte(pk2)))
	PKx := BytesToBig([]byte(pk1))
	PKy := BytesToBig([]byte(pk2))

	Ux, Uy, v := SignThumb(curve, ID, msg, s, Qx, Qy, PKx, PKy)
	sig := mergeBigInts(Ux, Uy, v)
	//fmt.Println("打印签名长度：", len(sig))

	//fmt.Println("签名得到的v值为：", v)

	return sig, nil

}

// Certificateless_Verify(publicKey, ID, signature, msg)
func Certificateless_Verify(pubkey []byte, id string, signature, msg []byte) error {

	//x, y := bytes_halve(pubkey)
	//fmt.Println("公钥第一部分长度为：", len(x))
	//fmt.Println("公钥第二部分长度为：", len(y))
	//fmt.Println("接收到消息！！！！！！！！！")
	curve := elliptic.P256()

	x, y := bytes_halve(pubkey)

	Qx := BytesToBig(x)
	Qy := BytesToBig(y)

	//fmt.Println(pubkey)

	ID := []byte(id)

	PK_pub := "7196e9722d561a0fea21485fc16140096cc9b88f7174aec7508f14a7b85b61ba299292c726367bbcbf8f00b977849164bf9d3fd6260e55dd6498517bc0dec541"
	pk1, pk2 := string_halve(PK_pub)
	PKx := BytesToBig([]byte(pk1))
	PKy := BytesToBig([]byte(pk2))

	Ux, Uy, v := AnalSig(signature)
	//fmt.Println("打印接收参数111：", v)
	//fmt.Println("转换后的签名结果为", Ux, Uy, v)

	err := VerifyThumb(curve, ID, msg, Qx, Qy, PKx, PKy, Ux, Uy, v)
	if err != nil {
		fmt.Println("shibai-----------------------------------------")
		return err
	}
	//fmt.Println("签名验证chenggongllllllll！！！！！！！！！！！！sssssssssssssssssss")*/
	return nil
}