693 lines
20 KiB
HTML
693 lines
20 KiB
HTML
<html>
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
|
|
<title>webauthn test</title>
|
|
</head>
|
|
<body onload="init()">
|
|
<h1>webauthn test</h1>
|
|
<p>
|
|
This is a demo/test page for generating FIDO keys and signatures in SSH
|
|
formats. The page initially displays a form to generate a FIDO key and
|
|
convert it to a SSH public key.
|
|
</p>
|
|
<p>
|
|
Once a key has been generated, an additional form will be displayed to
|
|
allow signing of data using the just-generated key. The data may be signed
|
|
as either a raw SSH signature or wrapped in a sshsig message (the latter is
|
|
easier to test using command-line tools.
|
|
</p>
|
|
<p>
|
|
Lots of debugging is printed along the way.
|
|
</p>
|
|
<h2>Enroll</h2>
|
|
<span id="error" style="color: #800; font-weight: bold; font-size: 150%;"></span>
|
|
<form id="enrollform">
|
|
<table>
|
|
<tr>
|
|
<td><b>Username:</b></td>
|
|
<td><input id="username" type="text" size="20" name="user" value="test" /></td>
|
|
</tr>
|
|
<tr><td></td><td><input id="assertsubmit" type="submit" value="submit" /></td></tr>
|
|
</table>
|
|
</form>
|
|
<span id="enrollresult" style="visibility: hidden;">
|
|
<h2>clientData</h2>
|
|
<pre id="enrollresultjson" style="color: #008; font-family: monospace;"></pre>
|
|
<h2>attestationObject raw</h2>
|
|
<pre id="enrollresultraw" style="color: #008; font-family: monospace;"></pre>
|
|
<h2>attestationObject</h2>
|
|
<pre id="enrollresultattestobj" style="color: #008; font-family: monospace;"></pre>
|
|
<h2>authData raw</h2>
|
|
<pre id="enrollresultauthdataraw" style="color: #008; font-family: monospace;"></pre>
|
|
<h2>authData</h2>
|
|
<pre id="enrollresultauthdata" style="color: #008; font-family: monospace;"></pre>
|
|
<h2>SSH pubkey blob</h2>
|
|
<pre id="enrollresultpkblob" style="color: #008; font-family: monospace;"></pre>
|
|
<h2>SSH pubkey string</h2>
|
|
<pre id="enrollresultpk" style="color: #008; font-family: monospace;"></pre>
|
|
</span>
|
|
<span id="assertsection" style="visibility: hidden;">
|
|
<h2>Assert</h2>
|
|
<form id="assertform">
|
|
<span id="asserterror" style="color: #800; font-weight: bold;"></span>
|
|
<table>
|
|
<tr>
|
|
<td><b>Data to sign:</b></td>
|
|
<td><input id="message" type="text" size="20" name="message" value="test" /></td>
|
|
</tr>
|
|
<tr>
|
|
<td><input id="message_sshsig" type="checkbox" checked /> use sshsig format</td>
|
|
</tr>
|
|
<tr>
|
|
<td><b>Signature namespace:</b></td>
|
|
<td><input id="message_namespace" type="text" size="20" name="namespace" value="test" /></td>
|
|
</tr>
|
|
<tr><td></td><td><input type="submit" value="submit" /></td></tr>
|
|
</table>
|
|
</form>
|
|
</span>
|
|
<span id="assertresult" style="visibility: hidden;">
|
|
<h2>clientData</h2>
|
|
<pre id="assertresultjson" style="color: #008; font-family: monospace;"></pre>
|
|
<h2>signature raw</h2>
|
|
<pre id="assertresultsigraw" style="color: #008; font-family: monospace;"></pre>
|
|
<h2>authenticatorData raw</h2>
|
|
<pre id="assertresultauthdataraw" style="color: #008; font-family: monospace;"></pre>
|
|
<h2>authenticatorData</h2>
|
|
<pre id="assertresultauthdata" style="color: #008; font-family: monospace;"></pre>
|
|
<h2>signature in SSH format</h2>
|
|
<pre id="assertresultsshsigraw" style="color: #008; font-family: monospace;"></pre>
|
|
<h2>signature in SSH format (base64 encoded)</h2>
|
|
<pre id="assertresultsshsigb64" style="color: #008; font-family: monospace;"></pre>
|
|
</span>
|
|
</body>
|
|
<script>
|
|
// ------------------------------------------------------------------
|
|
// a crappy CBOR decoder - 20200401 djm@openbsd.org
|
|
|
|
var CBORDecode = function(buffer) {
|
|
this.buf = buffer
|
|
this.v = new DataView(buffer)
|
|
this.offset = 0
|
|
}
|
|
|
|
CBORDecode.prototype.empty = function() {
|
|
return this.offset >= this.buf.byteLength
|
|
}
|
|
|
|
CBORDecode.prototype.getU8 = function() {
|
|
let r = this.v.getUint8(this.offset)
|
|
this.offset += 1
|
|
return r
|
|
}
|
|
|
|
CBORDecode.prototype.getU16 = function() {
|
|
let r = this.v.getUint16(this.offset)
|
|
this.offset += 2
|
|
return r
|
|
}
|
|
|
|
CBORDecode.prototype.getU32 = function() {
|
|
let r = this.v.getUint32(this.offset)
|
|
this.offset += 4
|
|
return r
|
|
}
|
|
|
|
CBORDecode.prototype.getU64 = function() {
|
|
let r = this.v.getUint64(this.offset)
|
|
this.offset += 8
|
|
return r
|
|
}
|
|
|
|
CBORDecode.prototype.getCBORTypeLen = function() {
|
|
let tl, t, l
|
|
tl = this.getU8()
|
|
t = (tl & 0xe0) >> 5
|
|
l = tl & 0x1f
|
|
return [t, this.decodeInteger(l)]
|
|
}
|
|
|
|
CBORDecode.prototype.decodeInteger = function(len) {
|
|
switch (len) {
|
|
case 0x18: return this.getU8()
|
|
case 0x19: return this.getU16()
|
|
case 0x20: return this.getU32()
|
|
case 0x21: return this.getU64()
|
|
default:
|
|
if (len <= 23) {
|
|
return len
|
|
}
|
|
throw new Error("Unsupported int type 0x" + len.toString(16))
|
|
}
|
|
}
|
|
|
|
CBORDecode.prototype.decodeNegint = function(len) {
|
|
let r = -(this.decodeInteger(len) + 1)
|
|
return r
|
|
}
|
|
|
|
CBORDecode.prototype.decodeByteString = function(len) {
|
|
let r = this.buf.slice(this.offset, this.offset + len)
|
|
this.offset += len
|
|
return r
|
|
}
|
|
|
|
CBORDecode.prototype.decodeTextString = function(len) {
|
|
let u8dec = new TextDecoder('utf-8')
|
|
r = u8dec.decode(this.decodeByteString(len))
|
|
return r
|
|
}
|
|
|
|
CBORDecode.prototype.decodeArray = function(len, level) {
|
|
let r = []
|
|
for (let i = 0; i < len; i++) {
|
|
let v = this.decodeInternal(level)
|
|
r.push(v)
|
|
// console.log("decodeArray level " + level.toString() + " index " + i.toString() + " value " + JSON.stringify(v))
|
|
}
|
|
return r
|
|
}
|
|
|
|
CBORDecode.prototype.decodeMap = function(len, level) {
|
|
let r = {}
|
|
for (let i = 0; i < len; i++) {
|
|
let k = this.decodeInternal(level)
|
|
let v = this.decodeInternal(level)
|
|
r[k] = v
|
|
// console.log("decodeMap level " + level.toString() + " key " + k.toString() + " value " + JSON.stringify(v))
|
|
// XXX check string keys, duplicates
|
|
}
|
|
return r
|
|
}
|
|
|
|
CBORDecode.prototype.decodePrimitive = function(t) {
|
|
switch (t) {
|
|
case 20: return false
|
|
case 21: return true
|
|
case 22: return null
|
|
case 23: return undefined
|
|
default:
|
|
throw new Error("Unsupported primitive 0x" + t.toString(2))
|
|
}
|
|
}
|
|
|
|
CBORDecode.prototype.decodeInternal = function(level) {
|
|
if (level > 256) {
|
|
throw new Error("CBOR nesting too deep")
|
|
}
|
|
let t, l, r
|
|
[t, l] = this.getCBORTypeLen()
|
|
// console.log("decode level " + level.toString() + " type " + t.toString() + " len " + l.toString())
|
|
switch (t) {
|
|
case 0:
|
|
r = this.decodeInteger(l)
|
|
break
|
|
case 1:
|
|
r = this.decodeNegint(l)
|
|
break
|
|
case 2:
|
|
r = this.decodeByteString(l)
|
|
break
|
|
case 3:
|
|
r = this.decodeTextString(l)
|
|
break
|
|
case 4:
|
|
r = this.decodeArray(l, level + 1)
|
|
break
|
|
case 5:
|
|
r = this.decodeMap(l, level + 1)
|
|
break
|
|
case 6:
|
|
console.log("XXX ignored semantic tag " + this.decodeInteger(l).toString())
|
|
break;
|
|
case 7:
|
|
r = this.decodePrimitive(l)
|
|
break
|
|
default:
|
|
throw new Error("Unsupported type 0x" + t.toString(2) + " len " + l.toString())
|
|
}
|
|
// console.log("decode level " + level.toString() + " value " + JSON.stringify(r))
|
|
return r
|
|
}
|
|
|
|
CBORDecode.prototype.decode = function() {
|
|
return this.decodeInternal(0)
|
|
}
|
|
|
|
// ------------------------------------------------------------------
|
|
// a crappy SSH message packer - 20200401 djm@openbsd.org
|
|
|
|
var SSHMSG = function() {
|
|
this.r = []
|
|
}
|
|
|
|
SSHMSG.prototype.serialise = function() {
|
|
let len = 0
|
|
for (buf of this.r) {
|
|
len += buf.length
|
|
}
|
|
let r = new ArrayBuffer(len)
|
|
let v = new Uint8Array(r)
|
|
let offset = 0
|
|
for (buf of this.r) {
|
|
v.set(buf, offset)
|
|
offset += buf.length
|
|
}
|
|
if (offset != r.byteLength) {
|
|
throw new Error("djm can't count")
|
|
}
|
|
return r
|
|
}
|
|
|
|
SSHMSG.prototype.serialiseBase64 = function(v) {
|
|
let b = this.serialise()
|
|
return btoa(String.fromCharCode(...new Uint8Array(b)));
|
|
}
|
|
|
|
SSHMSG.prototype.putU8 = function(v) {
|
|
this.r.push(new Uint8Array([v]))
|
|
}
|
|
|
|
SSHMSG.prototype.putU32 = function(v) {
|
|
this.r.push(new Uint8Array([
|
|
(v >> 24) & 0xff,
|
|
(v >> 16) & 0xff,
|
|
(v >> 8) & 0xff,
|
|
(v & 0xff)
|
|
]))
|
|
}
|
|
|
|
SSHMSG.prototype.put = function(v) {
|
|
this.r.push(new Uint8Array(v))
|
|
}
|
|
|
|
SSHMSG.prototype.putString = function(v) {
|
|
let enc = new TextEncoder();
|
|
let venc = enc.encode(v)
|
|
this.putU32(venc.length)
|
|
this.put(venc)
|
|
}
|
|
|
|
SSHMSG.prototype.putSSHMSG = function(v) {
|
|
let msg = v.serialise()
|
|
this.putU32(msg.byteLength)
|
|
this.put(msg)
|
|
}
|
|
|
|
SSHMSG.prototype.putBytes = function(v) {
|
|
this.putU32(v.byteLength)
|
|
this.put(v)
|
|
}
|
|
|
|
SSHMSG.prototype.putECPoint = function(x, y) {
|
|
let x8 = new Uint8Array(x)
|
|
let y8 = new Uint8Array(y)
|
|
this.putU32(1 + x8.length + y8.length)
|
|
this.putU8(0x04) // Uncompressed point format.
|
|
this.put(x8)
|
|
this.put(y8)
|
|
}
|
|
|
|
// ------------------------------------------------------------------
|
|
// webauthn to SSH glue - djm@openbsd.org 20200408
|
|
|
|
function error(msg, ...args) {
|
|
document.getElementById("error").innerText = msg
|
|
console.log(msg)
|
|
for (const arg of args) {
|
|
console.dir(arg)
|
|
}
|
|
}
|
|
function hexdump(buf) {
|
|
const hex = Array.from(new Uint8Array(buf)).map(
|
|
b => b.toString(16).padStart(2, "0"))
|
|
const fmt = new Array()
|
|
for (let i = 0; i < hex.length; i++) {
|
|
if ((i % 16) == 0) {
|
|
// Prepend length every 16 bytes.
|
|
fmt.push(i.toString(16).padStart(4, "0"))
|
|
fmt.push(" ")
|
|
}
|
|
fmt.push(hex[i])
|
|
fmt.push(" ")
|
|
if ((i % 16) == 15) {
|
|
fmt.push("\n")
|
|
}
|
|
}
|
|
return fmt.join("")
|
|
}
|
|
function enrollform_submit(event) {
|
|
event.preventDefault();
|
|
console.log("submitted")
|
|
username = event.target.elements.username.value
|
|
if (username === "") {
|
|
error("no username specified")
|
|
return false
|
|
}
|
|
enrollStart(username)
|
|
}
|
|
function enrollStart(username) {
|
|
let challenge = new Uint8Array(32)
|
|
window.crypto.getRandomValues(challenge)
|
|
let userid = new Uint8Array(8)
|
|
window.crypto.getRandomValues(userid)
|
|
|
|
console.log("challenge:" + btoa(challenge))
|
|
console.log("userid:" + btoa(userid))
|
|
|
|
let pkopts = {
|
|
challenge: challenge,
|
|
rp: {
|
|
name: "mindrot.org",
|
|
id: "mindrot.org",
|
|
},
|
|
user: {
|
|
id: userid,
|
|
name: username,
|
|
displayName: username,
|
|
},
|
|
authenticatorSelection: {
|
|
authenticatorAttachment: "cross-platform",
|
|
userVerification: "discouraged",
|
|
},
|
|
pubKeyCredParams: [{alg: -7, type: "public-key"}], // ES256
|
|
timeout: 30 * 1000,
|
|
};
|
|
console.dir(pkopts)
|
|
window.enrollOpts = pkopts
|
|
let credpromise = navigator.credentials.create({ publicKey: pkopts });
|
|
credpromise.then(enrollSuccess, enrollFailure)
|
|
}
|
|
function enrollFailure(result) {
|
|
error("Enroll failed", result)
|
|
}
|
|
function enrollSuccess(result) {
|
|
console.log("Enroll succeeded")
|
|
console.dir(result)
|
|
window.enrollResult = result
|
|
document.getElementById("enrollresult").style.visibility = "visible"
|
|
|
|
// Show the clientData
|
|
let u8dec = new TextDecoder('utf-8')
|
|
clientData = u8dec.decode(result.response.clientDataJSON)
|
|
document.getElementById("enrollresultjson").innerText = clientData
|
|
|
|
// Decode and show the attestationObject
|
|
document.getElementById("enrollresultraw").innerText = hexdump(result.response.attestationObject)
|
|
let aod = new CBORDecode(result.response.attestationObject)
|
|
let attestationObject = aod.decode()
|
|
console.log("attestationObject")
|
|
console.dir(attestationObject)
|
|
document.getElementById("enrollresultattestobj").innerText = JSON.stringify(attestationObject)
|
|
|
|
// Decode and show the authData
|
|
document.getElementById("enrollresultauthdataraw").innerText = hexdump(attestationObject.authData)
|
|
let authData = decodeAuthenticatorData(attestationObject.authData, true)
|
|
console.log("authData")
|
|
console.dir(authData)
|
|
window.enrollAuthData = authData
|
|
document.getElementById("enrollresultauthdata").innerText = JSON.stringify(authData)
|
|
|
|
// Reformat the pubkey as a SSH key for easy verification
|
|
window.rawKey = reformatPubkey(authData.attestedCredentialData.credentialPublicKey, window.enrollOpts.rp.id)
|
|
console.log("SSH pubkey blob")
|
|
console.dir(window.rawKey)
|
|
document.getElementById("enrollresultpkblob").innerText = hexdump(window.rawKey)
|
|
let pk64 = btoa(String.fromCharCode(...new Uint8Array(window.rawKey)));
|
|
let pk = "sk-ecdsa-sha2-nistp256@openssh.com " + pk64
|
|
document.getElementById("enrollresultpk").innerText = pk
|
|
|
|
// Success: show the assertion form.
|
|
document.getElementById("assertsection").style.visibility = "visible"
|
|
}
|
|
|
|
function decodeAuthenticatorData(authData, expectCred) {
|
|
let r = new Object()
|
|
let v = new DataView(authData)
|
|
|
|
r.rpIdHash = authData.slice(0, 32)
|
|
r.flags = v.getUint8(32)
|
|
r.signCount = v.getUint32(33)
|
|
|
|
// Decode attestedCredentialData if present.
|
|
let offset = 37
|
|
let acd = new Object()
|
|
if (expectCred) {
|
|
acd.aaguid = authData.slice(offset, offset+16)
|
|
offset += 16
|
|
let credentialIdLength = v.getUint16(offset)
|
|
offset += 2
|
|
acd.credentialIdLength = credentialIdLength
|
|
acd.credentialId = authData.slice(offset, offset+credentialIdLength)
|
|
offset += credentialIdLength
|
|
r.attestedCredentialData = acd
|
|
}
|
|
console.log("XXXXX " + offset.toString())
|
|
let pubkeyrest = authData.slice(offset, authData.byteLength)
|
|
let pkdecode = new CBORDecode(pubkeyrest)
|
|
if (expectCred) {
|
|
// XXX unsafe: doesn't mandate COSE canonical format.
|
|
acd.credentialPublicKey = pkdecode.decode()
|
|
}
|
|
if (!pkdecode.empty()) {
|
|
// Decode extensions if present.
|
|
r.extensions = pkdecode.decode()
|
|
}
|
|
return r
|
|
}
|
|
|
|
function reformatPubkey(pk, rpid) {
|
|
// pk is in COSE format. We only care about a tiny subset.
|
|
if (pk[1] != 2) {
|
|
console.dir(pk)
|
|
throw new Error("pubkey is not EC")
|
|
}
|
|
if (pk[-1] != 1) {
|
|
throw new Error("pubkey is not in P256")
|
|
}
|
|
if (pk[3] != -7) {
|
|
throw new Error("pubkey is not ES256")
|
|
}
|
|
if (pk[-2].byteLength != 32 || pk[-3].byteLength != 32) {
|
|
throw new Error("pubkey EC coords have bad length")
|
|
}
|
|
let msg = new SSHMSG()
|
|
msg.putString("sk-ecdsa-sha2-nistp256@openssh.com") // Key type
|
|
msg.putString("nistp256") // Key curve
|
|
msg.putECPoint(pk[-2], pk[-3]) // EC key
|
|
msg.putString(rpid) // RP ID
|
|
return msg.serialise()
|
|
}
|
|
|
|
async function assertform_submit(event) {
|
|
event.preventDefault();
|
|
console.log("submitted")
|
|
message = event.target.elements.message.value
|
|
if (message === "") {
|
|
error("no message specified")
|
|
return false
|
|
}
|
|
let enc = new TextEncoder()
|
|
let encmsg = enc.encode(message)
|
|
window.assertSignRaw = !event.target.elements.message_sshsig.checked
|
|
console.log("using sshsig ", !window.assertSignRaw)
|
|
if (window.assertSignRaw) {
|
|
assertStart(encmsg)
|
|
return
|
|
}
|
|
// Format a sshsig-style message.
|
|
window.sigHashAlg = "sha512"
|
|
let msghash = await crypto.subtle.digest("SHA-512", encmsg);
|
|
console.log("raw message hash")
|
|
console.dir(msghash)
|
|
window.sigNamespace = event.target.elements.message_namespace.value
|
|
let sigbuf = new SSHMSG()
|
|
sigbuf.put(enc.encode("SSHSIG"))
|
|
sigbuf.putString(window.sigNamespace)
|
|
sigbuf.putU32(0) // Reserved string
|
|
sigbuf.putString(window.sigHashAlg)
|
|
sigbuf.putBytes(msghash)
|
|
let msg = sigbuf.serialise()
|
|
console.log("sigbuf")
|
|
console.dir(msg)
|
|
assertStart(msg)
|
|
}
|
|
|
|
function assertStart(message) {
|
|
let assertReqOpts = {
|
|
challenge: message,
|
|
rpId: "mindrot.org",
|
|
allowCredentials: [{
|
|
type: 'public-key',
|
|
id: window.enrollResult.rawId,
|
|
}],
|
|
userVerification: "discouraged",
|
|
timeout: (30 * 1000),
|
|
}
|
|
console.log("assertReqOpts")
|
|
console.dir(assertReqOpts)
|
|
window.assertReqOpts = assertReqOpts
|
|
let assertpromise = navigator.credentials.get({
|
|
publicKey: assertReqOpts
|
|
});
|
|
assertpromise.then(assertSuccess, assertFailure)
|
|
}
|
|
function assertFailure(result) {
|
|
error("Assertion failed", result)
|
|
}
|
|
function linewrap(s) {
|
|
const linelen = 70
|
|
let ret = ""
|
|
for (let i = 0; i < s.length; i += linelen) {
|
|
end = i + linelen
|
|
if (end > s.length) {
|
|
end = s.length
|
|
}
|
|
if (i > 0) {
|
|
ret += "\n"
|
|
}
|
|
ret += s.slice(i, end)
|
|
}
|
|
return ret + "\n"
|
|
}
|
|
function assertSuccess(result) {
|
|
console.log("Assertion succeeded")
|
|
console.dir(result)
|
|
window.assertResult = result
|
|
document.getElementById("assertresult").style.visibility = "visible"
|
|
|
|
// show the clientData.
|
|
let u8dec = new TextDecoder('utf-8')
|
|
clientData = u8dec.decode(result.response.clientDataJSON)
|
|
document.getElementById("assertresultjson").innerText = clientData
|
|
|
|
// show the signature.
|
|
document.getElementById("assertresultsigraw").innerText = hexdump(result.response.signature)
|
|
|
|
// decode and show the authData.
|
|
document.getElementById("assertresultauthdataraw").innerText = hexdump(result.response.authenticatorData)
|
|
authData = decodeAuthenticatorData(result.response.authenticatorData, false)
|
|
document.getElementById("assertresultauthdata").innerText = JSON.stringify(authData)
|
|
|
|
// Parse and reformat the signature to an SSH style signature.
|
|
let sshsig = reformatSignature(result.response.signature, clientData, authData)
|
|
document.getElementById("assertresultsshsigraw").innerText = hexdump(sshsig)
|
|
let sig64 = btoa(String.fromCharCode(...new Uint8Array(sshsig)));
|
|
if (window.assertSignRaw) {
|
|
document.getElementById("assertresultsshsigb64").innerText = sig64
|
|
} else {
|
|
document.getElementById("assertresultsshsigb64").innerText =
|
|
"-----BEGIN SSH SIGNATURE-----\n" + linewrap(sig64) +
|
|
"-----END SSH SIGNATURE-----\n";
|
|
}
|
|
}
|
|
|
|
function reformatSignature(sig, clientData, authData) {
|
|
if (sig.byteLength < 2) {
|
|
throw new Error("signature is too short")
|
|
}
|
|
let offset = 0
|
|
let v = new DataView(sig)
|
|
// Expect an ASN.1 SEQUENCE that exactly spans the signature.
|
|
if (v.getUint8(offset) != 0x30) {
|
|
throw new Error("signature not an ASN.1 sequence")
|
|
}
|
|
offset++
|
|
let seqlen = v.getUint8(offset)
|
|
offset++
|
|
if ((seqlen & 0x80) != 0 || seqlen != sig.byteLength - offset) {
|
|
throw new Error("signature has unexpected length " + seqlen.toString() + " vs expected " + (sig.byteLength - offset).toString())
|
|
}
|
|
|
|
// Parse 'r' INTEGER value.
|
|
if (v.getUint8(offset) != 0x02) {
|
|
throw new Error("signature r not an ASN.1 integer")
|
|
}
|
|
offset++
|
|
let rlen = v.getUint8(offset)
|
|
offset++
|
|
if ((rlen & 0x80) != 0 || rlen > sig.byteLength - offset) {
|
|
throw new Error("signature r has unexpected length " + rlen.toString() + " vs buffer " + (sig.byteLength - offset).toString())
|
|
}
|
|
let r = sig.slice(offset, offset + rlen)
|
|
offset += rlen
|
|
console.log("sig_r")
|
|
console.dir(r)
|
|
|
|
// Parse 's' INTEGER value.
|
|
if (v.getUint8(offset) != 0x02) {
|
|
throw new Error("signature r not an ASN.1 integer")
|
|
}
|
|
offset++
|
|
let slen = v.getUint8(offset)
|
|
offset++
|
|
if ((slen & 0x80) != 0 || slen > sig.byteLength - offset) {
|
|
throw new Error("signature s has unexpected length " + slen.toString() + " vs buffer " + (sig.byteLength - offset).toString())
|
|
}
|
|
let s = sig.slice(offset, offset + slen)
|
|
console.log("sig_s")
|
|
console.dir(s)
|
|
offset += slen
|
|
|
|
if (offset != sig.byteLength) {
|
|
throw new Error("unexpected final offset during signature parsing " + offset.toString() + " expected " + sig.byteLength.toString())
|
|
}
|
|
|
|
// Reformat as an SSH signature.
|
|
let clientDataParsed = JSON.parse(clientData)
|
|
let innersig = new SSHMSG()
|
|
innersig.putBytes(r)
|
|
innersig.putBytes(s)
|
|
|
|
let rawsshsig = new SSHMSG()
|
|
rawsshsig.putString("webauthn-sk-ecdsa-sha2-nistp256@openssh.com")
|
|
rawsshsig.putSSHMSG(innersig)
|
|
rawsshsig.putU8(authData.flags)
|
|
rawsshsig.putU32(authData.signCount)
|
|
rawsshsig.putString(clientDataParsed.origin)
|
|
rawsshsig.putString(clientData)
|
|
if (authData.extensions == undefined) {
|
|
rawsshsig.putU32(0)
|
|
} else {
|
|
rawsshsig.putBytes(authData.extensions)
|
|
}
|
|
|
|
if (window.assertSignRaw) {
|
|
return rawsshsig.serialise()
|
|
}
|
|
// Format as SSHSIG.
|
|
let enc = new TextEncoder()
|
|
let sshsig = new SSHMSG()
|
|
sshsig.put(enc.encode("SSHSIG"))
|
|
sshsig.putU32(0x01) // Signature version.
|
|
sshsig.putBytes(window.rawKey)
|
|
sshsig.putString(window.sigNamespace)
|
|
sshsig.putU32(0) // Reserved string
|
|
sshsig.putString(window.sigHashAlg)
|
|
sshsig.putBytes(rawsshsig.serialise())
|
|
return sshsig.serialise()
|
|
}
|
|
|
|
function toggleNamespaceVisibility() {
|
|
const assertsigtype = document.getElementById('message_sshsig');
|
|
const assertsignamespace = document.getElementById('message_namespace');
|
|
assertsignamespace.disabled = !assertsigtype.checked;
|
|
}
|
|
|
|
function init() {
|
|
if (document.location.protocol != "https:") {
|
|
error("This page must be loaded via https")
|
|
const assertsubmit = document.getElementById('assertsubmit')
|
|
assertsubmit.disabled = true
|
|
}
|
|
const enrollform = document.getElementById('enrollform');
|
|
enrollform.addEventListener('submit', enrollform_submit);
|
|
const assertform = document.getElementById('assertform');
|
|
assertform.addEventListener('submit', assertform_submit);
|
|
const assertsigtype = document.getElementById('message_sshsig');
|
|
assertsigtype.onclick = toggleNamespaceVisibility;
|
|
}
|
|
</script>
|
|
|
|
</html>
|