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function getValue(name) { return document.getElementsByName(name)[0].value }
function setValue(name, val) { document.getElementsByName(name)[0].value = val }
function getText(name) { return document.getElementsByName(name)[0].innerText }
function setText(name, val) { document.getElementsByName(name)[0].innerText = val }
bls.init()
.then(() => {
setText('status', 'ok')
setText('curveOrder', bls.getCurveOrder())
})
let prevSelectedCurve = -1
function onChangeSelectCurve() {
const obj = document.selectCurve.curveType
const idx = obj.selectedIndex
const curve = obj.options[idx].value
if (curve == prevSelectedCurve) return
prevSelectedCurve = curve
console.log('idx=' + idx)
const r = bls.blsInit(idx)
setText('status', r ? 'err:' + r : 'ok')
setText('curveOrder', bls.getCurveOrder())
}
function rand(val) {
const x = new she.Id()
x.setByCSPRNG()
setValue(val, c.toHexStr())
}
function bench(label, count, func) {
const start = Date.now()
for (let i = 0; i < count; i++) {
func()
}
const end = Date.now()
const t = (end - start) / count
setText(label, t)
}
function benchBls() {
const sec = new bls.SecretKey()
sec.setByCSPRNG()
const pub = sec.getPublicKey()
const msg = 'abc'
bench('time_sign_class', 50, () => sec.sign(msg))
const sig = sec.sign(msg)
bench('time_verify_class', 50, () => pub.verify(sig, msg))
}
function onClickBenchmark() {
benchBls()
}
function onClickTestSignature() {
const sec = new bls.SecretKey()
sec.setByCSPRNG()
setText('secretKey', sec.toHexStr())
const pub = sec.getPublicKey()
setText('publicKey', pub.toHexStr())
const msg = getValue('msg')
console.log('msg=' + msg)
const sig = sec.sign(msg)
setText('signature', sig.toHexStr())
const r = pub.verify(sig, msg)
setText('verifyResult', r ? 'ok' : 'err')
}
/*
return [min, max)
assume min < max
*/
function randRange(min, max) {
return min + Math.floor(Math.random() * (max - min))
}
/*
select k of [0, n)
@note not uniformal distribution
*/
function randSelect(k, n) {
let a = []
let prev = -1
for (let i = 0; i < k; i++) {
let v = randRange(prev + 1, n - (k - i) + 1)
a.push(v)
prev = v
}
return a
}
function onClickTestMisc()
{
const idDec = getValue('idDec')
console.log('idDec=' + idDec)
const id = new bls.Id()
id.setStr(idDec)
setText('idDec2', id.getStr())
setText('idHex', id.getStr(16))
const sec = new bls.SecretKey()
sec.setLittleEndian(bls.fromHexStr(getValue('sec1')))
setText('secSerialize', sec.toHexStr())
}
function onClickTestShare()
{
let k = parseInt(getValue('ss_k'))
let n = parseInt(getValue('ss_n'))
let msg = getValue('msg2')
console.log('k = ' + k)
console.log('n = ' + n)
console.log('msg = ' + msg)
if (n < k) {
alert('err : n is smaller than k')
return
}
let msk = []
let mpk = []
let idVec = []
let secVec = []
let pubVec = []
let sigVec = []
/*
setup master secret key
*/
for (let i = 0; i < k; i++) {
let sk = new bls.SecretKey()
sk.setByCSPRNG()
msk.push(sk)
let pk = sk.getPublicKey()
mpk.push(pk)
}
setText('msk', bls.toHexStr(msk[0].serialize()))
setText('mpk', bls.toHexStr(mpk[0].serialize()))
{
let sig = msk[0].sign(msg)
setText('signature2', bls.toHexStr(sig.serialize()))
console.log('mpk[0] verify ' + mpk[0].verify(sig, msg))
}
/*
key sharing
*/
for (let i = 0; i < n; i++) {
let id = new bls.Id()
// blsIdSetInt(id, i + 1)
id.setByCSPRNG()
idVec.push(id)
let sk = new bls.SecretKey()
sk.share(msk, idVec[i])
secVec.push(sk)
let pk = new bls.PublicKey()
pk.share(mpk, idVec[i])
pubVec.push(pk)
let sig = sk.sign(msg)
sigVec.push(sig)
console.log(i + ' : verify msg : ' + pk.verify(sig, msg))
}
let o = document.getElementById('idlist')
let ol = document.createElement('ol')
let t = ''
for (let i = 0; i < n; i++) {
let id = idVec[i].toHexStr()
let sk = secVec[i].toHexStr()
let pk = pubVec[i].toHexStr()
let sig = sigVec[i].toHexStr()
t += '<li id="ui"' + i + '"> '
t += 'id : <span id="id"' + i + '">' + id + '</span><br>'
t += 'pk : <span id="pk"' + i + '">' + pk + '</span><br>'
t += 'sk : <span id="sk"' + i + '">' + sk + '</span><br>'
t += 'sig: <span id="sig"' + i + '">' + sig + '</span><br>'
}
ol.innerHTML = t
o.firstElementChild.innerHTML = ol.innerHTML
/*
recover
*/
let idxVec = randSelect(k, n)
setText('idxVec', idxVec.toString())
let subIdVec = []
let subSecVec = []
let subPubVec = []
let subSigVec = []
for (let i = 0; i < idxVec.length; i++) {
let idx = idxVec[i]
subIdVec.push(idVec[idx])
subSecVec.push(secVec[idx])
subPubVec.push(pubVec[idx])
subSigVec.push(sigVec[idx])
}
{
let sec = new bls.SecretKey()
let pub = new bls.PublicKey()
let sig = new bls.Signature()
sec.recover(subSecVec, subIdVec)
pub.recover(subPubVec, subIdVec)
sig.recover(subSigVec, subIdVec)
let s = sec.toHexStr()
s += s == getText('msk') ? ' :ok' : ' :ng'
setText('recoverSec', s)
s = pub.toHexStr()
s += s == getText('mpk') ? ' :ok' : ' :ng'
setText('recoverPub', s)
s = sig.toHexStr()
s += s == getText('signature2') ? ' :ok' : ' :ng'
setText('recoverSig', s)
}
}
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