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package main
import ( "math/big" "net/http"
blindsecp256k1 "github.com/arnaucube/go-blindsecp256k1" "github.com/gin-gonic/gin" )
var sk *blindsecp256k1.PrivateKey var secretRs = make(map[string]*big.Int)
func getNewRequest(c *gin.Context) { k, signerR := blindsecp256k1.NewRequestParameters() key := signerR.X.String() + signerR.Y.String() secretRs[key] = k c.JSON(http.StatusOK, gin.H{"signerR": signerR, "signerQ": sk.Public().Point()}) }
type msgPostBlindSign struct { M string `json:"m"` R *blindsecp256k1.Point `json:"r"` }
func postBlindSign(c *gin.Context) { var msg msgPostBlindSign c.BindJSON(&msg)
m, ok := new(big.Int).SetString(msg.M, 10) if !ok { c.String(http.StatusBadRequest, "can not parse m") return }
key := msg.R.X.String() + msg.R.Y.String() if _, ok := secretRs[key]; !ok { c.String(http.StatusBadRequest, "unknown R") return } k := secretRs[key] sBlind, err := sk.BlindSign(m, k) if err != nil { c.String(http.StatusBadRequest, "err on BlindSign: "+err.Error()) return } delete(secretRs, key) c.JSON(http.StatusOK, gin.H{"sBlind": sBlind.String()}) }
func main() { secretRs = make(map[string]*big.Int) sk = blindsecp256k1.NewPrivateKey()
r := gin.Default()
r.GET("/request", getNewRequest) r.POST("/blindsign", postBlindSign) r.Static("/web", "./client")
r.Run("127.0.0.1:3000") }
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