commit d07bfe063c6f0081c60b4dede3bbee8b9b6c9ad6 Author: arnaucube Date: Sun Jan 17 19:49:54 2021 +0100 Add example Server & Client diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..14fe915 --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +wasm_exec.js diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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But first, please read +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..fc4dd3c --- /dev/null +++ b/README.md @@ -0,0 +1,18 @@ +# blindsig-client-server-example +Example of usage of https://github.com/arnaucube/go-blindsecp256k1, including a server representing the 'signer', and a web representing the 'user'. + +## Run +- Needs [go](https://golang.org/) installed +- Add the file `wasm_exec.js` in the `client` directory: +``` +cd client +cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" . +``` +- Run the server: +``` +go run main.go +``` +- Open the browser at `127.0.0.1:3000/web` + +## Flow +![diagram](https://raw.githubusercontent.com/arnaucube/blindsig-client-server-example/master/diagram.png "diagram") diff --git a/client/blindsecp256k1.wasm b/client/blindsecp256k1.wasm new file mode 100755 index 0000000..dad7eb6 Binary files /dev/null and b/client/blindsecp256k1.wasm differ diff --git a/client/index.html b/client/index.html new file mode 100644 index 0000000..9162d44 --- /dev/null +++ b/client/index.html @@ -0,0 +1,36 @@ + + + + blindsig-client-server-example + + + + +

blindsig-client-server-example

+

This is an example of usage of https://github.com/arnaucube/go-blindsecp256k1

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+

+ + +

+ + + + + diff --git a/client/index.js b/client/index.js new file mode 100644 index 0000000..658bf4b --- /dev/null +++ b/client/index.js @@ -0,0 +1,68 @@ +// signer public parameters +let rx, ry, qx, qy; +// user parameters +let m, mBlinded, uA, uB, uFx, uFy, sigS, sigFx, sigFy; + +function newRequest() { + m = document.getElementById("msg").value; + + axios.get('/request') + .then(function (res) { + console.log("/request res:", res.data); + rx = res.data.signerR.x; + ry = res.data.signerR.y; + qx = res.data.signerQ.x; + qy = res.data.signerQ.y; + document.getElementById("signerRx").innerHTML = "signerR.x: " + rx; + document.getElementById("signerRy").innerHTML = "signerR.y: " + ry; + + document.getElementById("signerQx").innerHTML = "signerQ.x: " + qx; + document.getElementById("signerQy").innerHTML = "signerQ.y: " + qy; + + console.log("blind msg"); + let blindRes = wasmBlind(m, rx, ry); + console.log("blindRes:", blindRes); + mBlinded = blindRes.mBlinded; + uA = blindRes.uA; + uB = blindRes.uB; + uFx = blindRes.uFx; + uFy = blindRes.uFy; + }) + .catch(function (error) { + console.error(error); + alert(error); + }); +} + +function askBlindSign() { + console.log("askBlindSign"); + let data = { + m: mBlinded, + r: {x:rx, y:ry} + }; + axios.post('/blindsign', data) + .then(function (res) { + console.log("/blindSign res:", res.data); + document.getElementById("sBlind").innerHTML = "sBlind: " + res.data.sBlind; + + let unblindRes = wasmUnblind(res.data.sBlind, m, uA, uB, uFx, uFy); + console.log("unblind", unblindRes); + sigS = unblindRes.s; + sigFx = unblindRes.fx; + sigFy = unblindRes.fy; + document.getElementById("sigS").innerHTML = "s: " + sigS; + document.getElementById("sigFx").innerHTML = "f.x: " + sigFx; + document.getElementById("sigFy").innerHTML = "f.y: " + sigFy; + }) + .catch(function (error) { + console.error(error); + alert(error); + }); +} + +function verify() { + let verified = wasmVerify(m, sigS, sigFx, sigFy, qx, qy); + console.log("verify", verified); + document.getElementById("verified").innerHTML = "signature verification, verified: " + verified; +} + diff --git a/diagram.png b/diagram.png new file mode 100644 index 0000000..4dab9a4 Binary files /dev/null and b/diagram.png differ diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..6613c8e --- /dev/null +++ b/go.mod @@ -0,0 +1,9 @@ +module example + +go 1.14 + +require ( + github.com/arnaucube/go-blindsecp256k1 v0.0.0-20210117185306-6b939806742d + github.com/gin-gonic/gin v1.6.3 // indirect + github.com/stretchr/testify v1.6.1 +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..db054ef --- /dev/null +++ b/go.sum @@ -0,0 +1,232 @@ +github.com/Azure/azure-pipeline-go v0.2.1/go.mod h1:UGSo8XybXnIGZ3epmeBw7Jdz+HiUVpqIlpz/HKHylF4= +github.com/Azure/azure-pipeline-go v0.2.2/go.mod h1:4rQ/NZncSvGqNkkOsNpOU1tgoNuIlp9AfUH5G1tvCHc= +github.com/Azure/azure-storage-blob-go v0.7.0/go.mod h1:f9YQKtsG1nMisotuTPpO0tjNuEjKRYAcJU8/ydDI++4= 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100644 index 0000000..d93e7b9 --- /dev/null +++ b/main.go @@ -0,0 +1,57 @@ +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 := sk.BlindSign(m, k) + 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(":3000") +}