arnaucube/go-blindsecp256k1
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Implement https://sci-hub.do/10.1109/ICCKE.2013.6682844

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Previous to this commit there was the implementation of "[An Efficient Blind Signature Scheme Based on the Elliptic Curve Discrete Logarithm Problem](http://www.isecure-journal.com/article_39171_47f9ec605dd3918c2793565ec21fcd7a.pdf)" paper by by Morteza Nikooghadama & Ali Zakerolhosseini.

This commit adds the implementation of "[New Blind Signature Schemes Based on the (Elliptic Curve) Discrete Logarithm Problem](https://sci-hub.do/10.1109/ICCKE.2013.6682844)" paper by Hamid Mala & Nafiseh Nezhadansari.
This commit is contained in:
arnaucube
2021-01-11 21:08:46 +01:00
parent c3e4afc552
commit ec095bba83
10 changed files with 573 additions and 42 deletions
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90
wasm/blindsecp256k1-wasm.go
View File

@@ -5,6 +5,8 @@ import (
"fmt"
"math/big"
"syscall/js"
blindsecp256k1v0 "blindsecp256k1/v0"
)
func main() {
@@ -15,6 +17,12 @@ func main() {
}
func registerCallbacks() {
// blindv0 & unblindv0 uses:
// http://www.isecure-journal.com/article_39171_47f9ec605dd3918c2793565ec21fcd7a.pdf
js.Global().Set("blindv0", js.FuncOf(blindv0))
js.Global().Set("unblindv0", js.FuncOf(unblindv0))
// blind & unblind uses: https://sci-hub.do/10.1109/ICCKE.2013.6682844
js.Global().Set("blind", js.FuncOf(blind))
js.Global().Set("unblind", js.FuncOf(unblind))
}
@@ -27,6 +35,77 @@ func stringToBigInt(s string) *big.Int {
return b
}
func blindv0(this js.Value, values []js.Value) interface{} {
mStr := values[0].String()
signerQxStr := values[1].String()
signerQyStr := values[2].String()
signerRxStr := values[3].String()
signerRyStr := values[4].String()
m := stringToBigInt(mStr)
signerQx := stringToBigInt(signerQxStr)
signerQy := stringToBigInt(signerQyStr)
signerRx := stringToBigInt(signerRxStr)
signerRy := stringToBigInt(signerRyStr)
signerQ := &blindsecp256k1v0.PublicKey{
X: signerQx,
Y: signerQy,
}
signerR := &blindsecp256k1v0.Point{
X: signerRx,
Y: signerRy,
}
signer := &blindsecp256k1v0.SignerPublicData{signerQ, signerR}
mBlinded, user := blindsecp256k1v0.Blind(m, signer)
r := make(map[string]interface{})
r["mBlinded"] = mBlinded.String()
r["uA"] = user.A.String()
r["uB"] = user.B.String()
r["uC"] = user.C.String()
r["uC"] = user.C.String()
r["uFx"] = user.F.X.String()
r["uFy"] = user.F.Y.String()
return r
}
func unblindv0(this js.Value, values []js.Value) interface{} {
sBlindStr := values[0].String()
mStr := values[1].String()
uBStr := values[2].String()
uCStr := values[3].String()
uFxStr := values[4].String()
uFyStr := values[5].String()
sBlind := stringToBigInt(sBlindStr)
m := stringToBigInt(mStr)
uB := stringToBigInt(uBStr)
uC := stringToBigInt(uCStr)
uFx := stringToBigInt(uFxStr)
uFy := stringToBigInt(uFyStr)
uF := &blindsecp256k1v0.Point{
X: uFx,
Y: uFy,
}
u := &blindsecp256k1v0.UserSecretData{
// A not needed to Unblind
B: uB,
C: uC,
F: uF,
}
sig := blindsecp256k1v0.Unblind(sBlind, m, u)
r := make(map[string]interface{})
r["s"] = sig.S.String()
r["fx"] = sig.F.X.String()
r["fy"] = sig.F.Y.String()
return r
}
func blind(this js.Value, values []js.Value) interface{} {
mStr := values[0].String()
signerQxStr := values[1].String()
@@ -56,8 +135,6 @@ func blind(this js.Value, values []js.Value) interface{} {
r["mBlinded"] = mBlinded.String()
r["uA"] = user.A.String()
r["uB"] = user.B.String()
r["uC"] = user.C.String()
r["uC"] = user.C.String()
r["uFx"] = user.F.X.String()
r["uFy"] = user.F.Y.String()
return r
@@ -66,15 +143,15 @@ func blind(this js.Value, values []js.Value) interface{} {
func unblind(this js.Value, values []js.Value) interface{} {
sBlindStr := values[0].String()
mStr := values[1].String()
uBStr := values[2].String()
uCStr := values[3].String()
uAStr := values[2].String()
uBStr := values[3].String()
uFxStr := values[4].String()
uFyStr := values[5].String()
sBlind := stringToBigInt(sBlindStr)
m := stringToBigInt(mStr)
uA := stringToBigInt(uAStr)
uB := stringToBigInt(uBStr)
uC := stringToBigInt(uCStr)
uFx := stringToBigInt(uFxStr)
uFy := stringToBigInt(uFyStr)
@@ -84,9 +161,8 @@ func unblind(this js.Value, values []js.Value) interface{} {
}
u := &blindsecp256k1.UserSecretData{
// A not needed to Unblind
A: uA,
B: uB,
C: uC,
F: uF,
}

BIN
wasm/webtest/blindsecp256k1.wasm
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13
wasm/webtest/index.js
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@@ -1,6 +1,7 @@
function test() {
let m = "1952805748";
console.log("using: https://sci-hub.do/10.1109/ICCKE.2013.6682844");
// Q & R would be received from the Signer
let signerQx = "26613296432153871833441195158297038913673464785502568519907582377915678491093";
let signerQy = "81940194042971427014176158889809922552127995083760111384335138546589994227275";
@@ -11,6 +12,16 @@ function test() {
// sBlind would be received from the Signer
let sBlind = "7240298625621589352655632414257224668430424461224914067754717095121139699933353374227084479180038954015287518505167995306229258561275087198611946596619855";
let unblindRes = unblind(sBlind, m, blindRes.uB, blindRes.uC, blindRes.uFx, blindRes.uFy);
let unblindRes = unblind(sBlind, m, blindRes.uA, blindRes.uB, blindRes.uFx, blindRes.uFy);
console.log("unblind", unblindRes);
// ---
// v0
console.log("using: http://www.isecure-journal.com/article_39171_47f9ec605dd3918c2793565ec21fcd7a.pdf");
// Q & R would be received from the Signer
blindRes = blindv0(m, signerQx, signerQy, signerRx, signerRy);
console.log("blindv0", blindRes);
// sBlind would be received from the Signer
unblindRes = unblindv0(sBlind, m, blindRes.uB, blindRes.uC, blindRes.uFx, blindRes.uFy);
console.log("unblindv0", unblindRes);
}