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oauth3.js
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implemented verification of JWT signatures

This commit is contained in:
tigerbot 2017-03-13 13:37:06 -06:00
parent 4b63e38c1f
commit 6ec723ec1f
2 changed files with 53 additions and 42 deletions
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52
oauth3.core.js
View File

@ -14,6 +14,27 @@
return err;
}
}
, _binStr: {
bufferToBinStr: function (buf) {
return Array.prototype.map.call(new Uint8Array(buf), function(ch) {
return String.fromCharCode(ch);
}).join('');
}
, binStrToBuffer: function (str) {
var buf;
if ('undefined' !== typeof Uint8Array) {
buf = new Uint8Array(str.length);
} else {
buf = [];
}
Array.prototype.forEach.call(str, function (ch, ind) {
buf[ind] = ch.charCodeAt(0);
});
return buf;
}
}
, _base64: {
atob: function (base64) {
// atob must be called from the global context
@ -43,6 +64,12 @@
b64 = b64.replace(/=+/g, '');
return b64;
}
, urlSafeToBuffer: function (str) {
return OAUTH3._binStr.binStrToBuffer(OAUTH3._base64.decodeUrlSafe(str));
}
, bufferToUrlSafe: function (buf) {
return OAUTH3._base64.encodeUrlSafe(OAUTH3._binStr.bufferToBinStr(buf));
}
}
, uri: {
normalize: function (uri) {
@ -181,15 +208,26 @@
// { header: {}, payload: {}, signature: '' }
var parts = str.split(/\./g);
var jsons = parts.slice(0, 2).map(function (urlsafe64) {
var b64 = OAUTH3._base64.decodeUrlSafe(urlsafe64);
return b64;
return JSON.parse(OAUTH3._base64.decodeUrlSafe(urlsafe64));
});
return {
header: JSON.parse(jsons[0])
, payload: JSON.parse(jsons[1])
, signature: parts[2] // should remain url-safe base64
};
return { header: jsons[0], payload: jsons[1] };
}
, verify: function (str, pubKey) {
var parts = str.split(/\./g);
var data = OAUTH3._binStr.binStrToBuffer(parts.slice(0, 2).join('.'));
var signature = OAUTH3._base64.urlSafeToBuffer(parts[2]);
var keyPromise;
if (pubKey instanceof OAUTH3._browser.window.CryptoKey) {
keyPromise = OAUTH3.PromiseA.resolve(pubKey);
} else {
keyPromise = OAUTH3._browser.window.crypto.subtle.importKey('jwk', pubKey, {name: 'ECDSA', namedCurve: pubKey.crv}, false, ['verify']);
}
return keyPromise.then(function (key) {
return OAUTH3._browser.window.crypto.subtle.verify({name: 'ECDSA', hash: {name: 'SHA-256'}}, key, signature, data);
});
}
, freshness: function (tokenMeta, staletime, _now) {
staletime = staletime || (15 * 60);

43
oauth3.issuer.mock.js
View File

@ -3,33 +3,6 @@
var OAUTH3 = exports.OAUTH3 = exports.OAUTH3 || require('./oauth3.core.js').OAUTH3;
OAUTH3.utils.bufferToBinStr = function (buf) {
return Array.prototype.map.call(new Uint8Array(buf), function(ch) {
return String.fromCharCode(ch);
}).join('');
};
OAUTH3.utils.binStrToBuffer = function (str) {
var buf;
if ('undefined' !== typeof Uint8Array) {
buf = new Uint8Array(str.length);
} else {
buf = [];
}
Array.prototype.forEach.call(str, function (ch, ind) {
buf[ind] = ch.charCodeAt(0);
});
return buf;
};
OAUTH3._base64.urlSafeToBuffer = function (str) {
return OAUTH3.utils.binStrToBuffer(OAUTH3._base64.decodeUrlSafe(str));
};
OAUTH3._base64.bufferToUrlSafe = function (buf) {
return OAUTH3._base64.encodeUrlSafe(OAUTH3.utils.bufferToBinStr(buf));
};
OAUTH3.crypto = {};
OAUTH3.crypto.fingerprintJWK = function (jwk) {
var keys;
@ -51,7 +24,7 @@
}
var jwkStr = '{' + keys.map(function (name) { return name+':'+jwk[name]; }).join(',') + '}';
return window.crypto.subtle.digest({name: 'SHA-256'}, OAUTH3.utils.binStrToBuffer(jwkStr))
return window.crypto.subtle.digest({name: 'SHA-256'}, OAUTH3._binStr.binStrToBuffer(jwkStr))
.then(OAUTH3._base64.bufferToUrlSafe);
};
@ -59,7 +32,7 @@
var kekPromise, ecdsaPromise, secretPromise;
var salt = window.crypto.getRandomValues(new Uint8Array(16));
kekPromise = window.crypto.subtle.importKey('raw', OAUTH3.utils.binStrToBuffer(ppid), {name: 'PBKDF2'}, false, ['deriveKey'])
kekPromise = window.crypto.subtle.importKey('raw', OAUTH3._binStr.binStrToBuffer(ppid), {name: 'PBKDF2'}, false, ['deriveKey'])
.then(function (key) {
var opts = {name: 'PBKDF2', salt: salt, iterations: 8192, hash: {name: 'SHA-256'}};
return window.crypto.subtle.deriveKey(opts, key, {name: 'AES-GCM', length: 128}, false, ['encrypt']);
@ -92,8 +65,8 @@
});
return OAUTH3.PromiseA.all([kekPromise, ecdsaPromise, secretPromise]).then(function (keys) {
var ecdsaJwk = OAUTH3.utils.binStrToBuffer(JSON.stringify(keys[1].privateKey));
var secretJwk = OAUTH3.utils.binStrToBuffer(JSON.stringify(keys[2]));
var ecdsaJwk = OAUTH3._binStr.binStrToBuffer(JSON.stringify(keys[1].privateKey));
var secretJwk = OAUTH3._binStr.binStrToBuffer(JSON.stringify(keys[2]));
var ecdsaIv = window.crypto.getRandomValues(new Uint8Array(12));
var secretIv = window.crypto.getRandomValues(new Uint8Array(12));
@ -119,7 +92,7 @@
var encJwk = OAUTH3._base64.urlSafeToBuffer(storedObj.privateKey);
var iv = OAUTH3._base64.urlSafeToBuffer(storedObj.ecdsaIv);
return window.crypto.subtle.importKey('raw', OAUTH3.utils.binStrToBuffer(ppid), {name: 'PBKDF2'}, false, ['deriveKey'])
return window.crypto.subtle.importKey('raw', OAUTH3._binStr.binStrToBuffer(ppid), {name: 'PBKDF2'}, false, ['deriveKey'])
.then(function (key) {
var opts = {name: 'PBKDF2', salt: salt, iterations: 8192, hash: {name: 'SHA-256'}};
return window.crypto.subtle.deriveKey(opts, key, {name: 'AES-GCM', length: 128}, false, ['decrypt']);
@ -127,7 +100,7 @@
.then(function (key) {
return window.crypto.subtle.decrypt({name: 'AES-GCM', iv: iv}, key, encJwk);
})
.then(OAUTH3.utils.bufferToBinStr)
.then(OAUTH3._binStr.bufferToBinStr)
.then(JSON.parse)
.then(function (jwk) {
return window.crypto.subtle.importKey('jwk', jwk, {name: 'ECDSA', namedCurve: jwk.crv}, false, ['sign'])
@ -140,7 +113,7 @@
};
OAUTH3.crypto._getKey = function (ppid) {
return window.crypto.subtle.digest({name: 'SHA-256'}, OAUTH3.utils.binStrToBuffer(ppid))
return window.crypto.subtle.digest({name: 'SHA-256'}, OAUTH3._binStr.binStrToBuffer(ppid))
.then(function (hash) {
var name = 'kek-' + OAUTH3._base64.bufferToUrlSafe(hash);
var promise;
@ -168,7 +141,7 @@
, OAUTH3._base64.encodeUrlSafe(JSON.stringify(payload, null))
].join('.');
return window.crypto.subtle.sign({name: 'ECDSA', hash: {name: 'SHA-256'}}, key, OAUTH3.utils.binStrToBuffer(input))
return window.crypto.subtle.sign({name: 'ECDSA', hash: {name: 'SHA-256'}}, key, OAUTH3._binStr.binStrToBuffer(input))
.then(function (signature) {
return input + '.' + OAUTH3._base64.bufferToUrlSafe(signature);
});