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sea.js
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;(function(){
/* UNBUILD */
var root;
if(typeof window !== "undefined"){ root = window }
if(typeof global !== "undefined"){ root = global }
root = root || {};
var console = root.console || {log: function(){}};
function USE(arg){
return arg.slice? USE[R(arg)] : function(mod, path){
arg(mod = {exports: {}});
USE[R(path)] = mod.exports;
}
function R(p){
return p.split('/').slice(-1).toString().replace('.js','');
}
}
if(typeof module !== "undefined"){ var common = module }
/* UNBUILD */
;USE(function(module){
// Security, Encryption, and Authorization: SEA.js
// MANDATORY READING: http://gun.js.org/explainers/data/security.html
// THIS IS AN EARLY ALPHA!
function SEA(){}
if(typeof window !== "undefined"){ SEA.window = window }
module.exports = SEA;
})(USE, './root');
;USE(function(module){
var SEA = USE('./root');
if(SEA.window){
if(location.protocol.indexOf('s') < 0
&& location.host.indexOf('localhost') < 0
&& location.protocol.indexOf('file:') < 0){
location.protocol = 'https:'; // WebCrypto does NOT work without HTTPS!
}
}
})(USE, './https');
;USE(function(module){
// This is Array extended to have .toString(['utf8'|'hex'|'base64'])
function SeaArray() {}
Object.assign(SeaArray, { from: Array.from })
SeaArray.prototype = Object.create(Array.prototype)
SeaArray.prototype.toString = function(enc, start, end) { enc = enc || 'utf8'; start = start || 0;
const length = this.length
if (enc === 'hex') {
const buf = new Uint8Array(this)
return [ ...Array(((end && (end + 1)) || length) - start).keys()]
.map((i) => buf[ i + start ].toString(16).padStart(2, '0')).join('')
}
if (enc === 'utf8') {
return Array.from(
{ length: (end || length) - start },
(_, i) => String.fromCharCode(this[ i + start])
).join('')
}
if (enc === 'base64') {
return btoa(this)
}
}
module.exports = SeaArray;
})(USE, './array');
;USE(function(module){
// This is Buffer implementation used in SEA. Functionality is mostly
// compatible with NodeJS 'safe-buffer' and is used for encoding conversions
// between binary and 'hex' | 'utf8' | 'base64'
// See documentation and validation for safe implementation in:
// https://github.com/feross/safe-buffer#update
var SeaArray = USE('./array');
function SafeBuffer(...props) {
console.warn('new SafeBuffer() is depreciated, please use SafeBuffer.from()')
return SafeBuffer.from(...props)
}
SafeBuffer.prototype = Object.create(Array.prototype)
Object.assign(SafeBuffer, {
// (data, enc) where typeof data === 'string' then enc === 'utf8'|'hex'|'base64'
from() {
if (!Object.keys(arguments).length) {
throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
}
const input = arguments[0]
let buf
if (typeof input === 'string') {
const enc = arguments[1] || 'utf8'
if (enc === 'hex') {
const bytes = input.match(/([\da-fA-F]{2})/g)
.map((byte) => parseInt(byte, 16))
if (!bytes || !bytes.length) {
throw new TypeError('Invalid first argument for type \'hex\'.')
}
buf = SeaArray.from(bytes)
} else if (enc === 'utf8') {
const length = input.length
const words = new Uint16Array(length)
Array.from({ length: length }, (_, i) => words[i] = input.charCodeAt(i))
buf = SeaArray.from(words)
} else if (enc === 'base64') {
const dec = atob(input)
const length = dec.length
const bytes = new Uint8Array(length)
Array.from({ length: length }, (_, i) => bytes[i] = dec.charCodeAt(i))
buf = SeaArray.from(bytes)
} else if (enc === 'binary') {
buf = SeaArray.from(input)
} else {
console.info('SafeBuffer.from unknown encoding: '+enc)
}
return buf
}
const byteLength = input.byteLength
const length = input.byteLength ? input.byteLength : input.length
if (length) {
let buf
if (input instanceof ArrayBuffer) {
buf = new Uint8Array(input)
}
return SeaArray.from(buf || input)
}
},
// This is 'safe-buffer.alloc' sans encoding support
alloc(length, fill = 0 /*, enc*/ ) {
return SeaArray.from(new Uint8Array(Array.from({ length: length }, () => fill)))
},
// This is normal UNSAFE 'buffer.alloc' or 'new Buffer(length)' - don't use!
allocUnsafe(length) {
return SeaArray.from(new Uint8Array(Array.from({ length : length })))
},
// This puts together array of array like members
concat(arr) { // octet array
if (!Array.isArray(arr)) {
throw new TypeError('First argument must be Array containing ArrayBuffer or Uint8Array instances.')
}
return SeaArray.from(arr.reduce((ret, item) => ret.concat(Array.from(item)), []))
}
})
SafeBuffer.prototype.from = SafeBuffer.from
SafeBuffer.prototype.toString = SeaArray.prototype.toString
module.exports = SafeBuffer;
})(USE, './buffer');
;USE(function(module){
const Buffer = USE('./buffer')
const api = {Buffer: Buffer}
if (typeof __webpack_require__ === 'function' || typeof window !== 'undefined') {
var crypto = window.crypto || window.msCrypto;
var subtle = crypto.subtle || crypto.webkitSubtle;
const TextEncoder = window.TextEncoder
const TextDecoder = window.TextDecoder
Object.assign(api, {
crypto,
subtle,
TextEncoder,
TextDecoder,
random: (len) => Buffer.from(crypto.getRandomValues(new Uint8Array(Buffer.alloc(len))))
})
} else {
try{
var crypto = require('crypto');
const { subtle } = require('@trust/webcrypto') // All but ECDH
const { TextEncoder, TextDecoder } = require('text-encoding')
Object.assign(api, {
crypto,
subtle,
TextEncoder,
TextDecoder,
random: (len) => Buffer.from(crypto.randomBytes(len))
});
try{
const WebCrypto = require('node-webcrypto-ossl')
api.ossl = new WebCrypto({directory: 'key_storage'}).subtle // ECDH
}catch(e){
console.log("node-webcrypto-ossl is optionally needed for ECDH, please install if needed.");
}
}catch(e){
console.log("@trust/webcrypto and text-encoding are not included by default, you must add it to your package.json!");
TRUST_WEBCRYPTO_OR_TEXT_ENCODING_NOT_INSTALLED;
}
}
module.exports = api
})(USE, './shim');
;USE(function(module){
const Buffer = USE('./buffer')
const settings = {}
// Encryption parameters
const pbkdf2 = { hash: 'SHA-256', iter: 100000, ks: 64 }
const ecdsaSignProps = { name: 'ECDSA', hash: { name: 'SHA-256' } }
const ecdsaKeyProps = { name: 'ECDSA', namedCurve: 'P-256' }
const ecdhKeyProps = { name: 'ECDH', namedCurve: 'P-256' }
const _initial_authsettings = {
validity: 12 * 60 * 60, // internally in seconds : 12 hours
hook: (props) => props // { iat, exp, alias, remember }
// or return new Promise((resolve, reject) => resolve(props)
}
// These are used to persist user's authentication "session"
const authsettings = Object.assign({}, _initial_authsettings)
// This creates Web Cryptography API compliant JWK for sign/verify purposes
const keysToEcdsaJwk = (pub, d) => { // d === priv
//const [ x, y ] = Buffer.from(pub, 'base64').toString('utf8').split(':') // old
const [ x, y ] = pub.split('.') // new
var jwk = { kty: "EC", crv: "P-256", x: x, y: y, ext: true }
jwk.key_ops = d ? ['sign'] : ['verify'];
if(d){ jwk.d = d }
return jwk;
}
Object.assign(settings, {
pbkdf2: pbkdf2,
ecdsa: {
pair: ecdsaKeyProps,
sign: ecdsaSignProps
},
ecdh: ecdhKeyProps,
jwk: keysToEcdsaJwk,
recall: authsettings
})
module.exports = settings
})(USE, './settings');
;USE(function(module){
module.exports = (props) => {
try {
if(props.slice && 'SEA{' === props.slice(0,4)){
props = props.slice(3);
}
return props.slice ? JSON.parse(props) : props
} catch (e) {} //eslint-disable-line no-empty
return props
}
})(USE, './parse');
;USE(function(module){
const {
subtle, ossl = subtle, random: getRandomBytes, TextEncoder, TextDecoder
} = USE('./shim')
const Buffer = USE('./buffer')
const parse = USE('./parse')
const { pbkdf2 } = USE('./settings')
// This internal func returns SHA-256 hashed data for signing
const sha256hash = async (mm) => {
const m = parse(mm)
const hash = await ossl.digest({name: pbkdf2.hash}, new TextEncoder().encode(m))
return Buffer.from(hash)
}
module.exports = sha256hash
})(USE, './sha256');
;USE(function(module){
// This internal func returns SHA-1 hashed data for KeyID generation
const __shim = USE('./shim')
const subtle = __shim.subtle
const ossl = __shim.ossl ? __shim.__ossl : subtle
const sha1hash = (b) => ossl.digest({name: 'SHA-1'}, new ArrayBuffer(b))
module.exports = sha1hash
})(USE, './sha1');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
var u;
SEA.work = async (data, pair, cb) => { try { // used to be named `proof`
var salt = pair.epub || pair; // epub not recommended, salt should be random!
if(salt instanceof Function){
cb = salt;
salt = u;
}
salt = salt || shim.random(9);
if (SEA.window) {
// For browser subtle works fine
const key = await shim.subtle.importKey(
'raw', new shim.TextEncoder().encode(data), { name: 'PBKDF2' }, false, ['deriveBits']
)
const result = await shim.subtle.deriveBits({
name: 'PBKDF2',
iterations: S.pbkdf2.iter,
salt: new shim.TextEncoder().encode(salt),
hash: S.pbkdf2.hash,
}, key, S.pbkdf2.ks * 8)
data = shim.random(data.length) // Erase data in case of passphrase
const r = shim.Buffer.from(result, 'binary').toString('utf8')
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
}
// For NodeJS crypto.pkdf2 rocks
const crypto = shim.crypto;
const hash = crypto.pbkdf2Sync(
data,
new shim.TextEncoder().encode(salt),
S.pbkdf2.iter,
S.pbkdf2.ks,
S.pbkdf2.hash.replace('-', '').toLowerCase()
)
data = shim.random(data.length) // Erase passphrase for app
const r = hash && hash.toString('utf8')
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
SEA.err = e;
if(cb){ cb() }
return;
}}
module.exports = SEA.work;
})(USE, './work');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
var Buff = (typeof Buffer !== 'undefined')? Buffer : shim.Buffer;
//SEA.pair = async (data, proof, cb) => { try {
SEA.pair = async (cb) => { try {
const ecdhSubtle = shim.ossl || shim.subtle
// First: ECDSA keys for signing/verifying...
var sa = await shim.subtle.generateKey(S.ecdsa.pair, true, [ 'sign', 'verify' ])
.then(async (keys) => {
// privateKey scope doesn't leak out from here!
//const { d: priv } = await shim.subtle.exportKey('jwk', keys.privateKey)
const key = {};
key.priv = (await shim.subtle.exportKey('jwk', keys.privateKey)).d;
const pub = await shim.subtle.exportKey('jwk', keys.publicKey)
//const pub = Buff.from([ x, y ].join(':')).toString('base64') // old
key.pub = pub.x+'.'+pub.y // new
// x and y are already base64
// pub is UTF8 but filename/URL safe (https://www.ietf.org/rfc/rfc3986.txt)
// but split on a non-base64 letter.
return key;
})
// To include PGPv4 kind of keyId:
// const pubId = await SEA.keyid(keys.pub)
// Next: ECDH keys for encryption/decryption...
try{
var dh = await ecdhSubtle.generateKey(S.ecdh, true, ['deriveKey'])
.then(async (keys) => {
// privateKey scope doesn't leak out from here!
const key = {};
key.epriv = (await ecdhSubtle.exportKey('jwk', keys.privateKey)).d;
const pub = await ecdhSubtle.exportKey('jwk', keys.publicKey)
//const epub = Buff.from([ ex, ey ].join(':')).toString('base64') // old
key.epub = pub.x+'.'+pub.y // new
// ex and ey are already base64
// epub is UTF8 but filename/URL safe (https://www.ietf.org/rfc/rfc3986.txt)
// but split on a non-base64 letter.
return key;
})
}catch(e){
if(SEA.window){ throw e }
if(e == 'Error: ECDH is not a supported algorithm'){ console.log('Ignoring ECDH...') }
else { throw e }
} dh = dh || {};
const r = { pub: sa.pub, priv: sa.priv, /* pubId, */ epub: dh.epub, epriv: dh.epriv }
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
SEA.err = e;
if(cb){ cb() }
return;
}}
module.exports = SEA.pair;
})(USE, './pair');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
var sha256hash = USE('./sha256');
SEA.sign = async (data, pair, cb) => { try {
if(data.slice
&& 'SEA{' === data.slice(0,4)
&& '"m":' === data.slice(4,8)){
// TODO: This would prevent pair2 signing pair1's signature.
// So we may want to change this in the future.
// but for now, we want to prevent duplicate double signature.
if(cb){ try{ cb(data) }catch(e){console.log(e)} }
return data;
}
const pub = pair.pub
const priv = pair.priv
const jwk = S.jwk(pub, priv)
const msg = JSON.stringify(data)
const hash = await sha256hash(msg)
const sig = await shim.subtle.importKey('jwk', jwk, S.ecdsa.pair, false, ['sign'])
.then((key) => shim.subtle.sign(S.ecdsa.sign, key, new Uint8Array(hash))) // privateKey scope doesn't leak out from here!
const r = 'SEA'+JSON.stringify({m: msg, s: shim.Buffer.from(sig, 'binary').toString('utf8')});
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
SEA.err = e;
if(cb){ cb() }
return;
}}
module.exports = SEA.sign;
})(USE, './sign');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
var sha256hash = USE('./sha256');
var parse = USE('./parse');
var u;
SEA.verify = async (data, pair, cb) => { try {
const json = parse(data)
if(false === pair){ // don't verify!
const raw = (json !== data)?
(json.s && json.m)? parse(json.m) : data
: json;
if(cb){ try{ cb(raw) }catch(e){console.log(e)} }
return raw;
}
const pub = pair.pub || pair
const jwk = S.jwk(pub)
const key = await shim.subtle.importKey('jwk', jwk, S.ecdsa.pair, false, ['verify'])
const hash = await sha256hash(json.m)
const sig = new Uint8Array(shim.Buffer.from(json.s, 'utf8'))
const check = await shim.subtle.verify(S.ecdsa.sign, key, sig, new Uint8Array(hash))
if(!check){ throw "Signature did not match." }
const r = check? parse(json.m) : u;
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
SEA.err = e;
if(cb){ cb() }
return;
}}
module.exports = SEA.verify;
})(USE, './verify');
;USE(function(module){
var shim = USE('./shim');
var sha256hash = USE('./sha256');
const importGen = async (key, salt, opt) => {
//const combo = shim.Buffer.concat([shim.Buffer.from(key, 'utf8'), salt || shim.random(8)]).toString('utf8') // old
var opt = opt || {};
const combo = key + (salt || shim.random(8)).toString('utf8'); // new
const hash = shim.Buffer.from(await sha256hash(combo), 'binary')
return await shim.subtle.importKey('raw', new Uint8Array(hash), opt.name || 'AES-GCM', false, ['encrypt', 'decrypt'])
}
module.exports = importGen;
})(USE, './aeskey');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
var aeskey = USE('./aeskey');
SEA.encrypt = async (data, pair, cb, opt) => { try {
var opt = opt || {};
const key = pair.epriv || pair;
const msg = JSON.stringify(data)
const rand = {s: shim.random(8), iv: shim.random(16)};
const ct = await aeskey(key, rand.s, opt)
.then((aes) => shim.subtle.encrypt({ // Keeping the AES key scope as private as possible...
name: opt.name || 'AES-GCM', iv: new Uint8Array(rand.iv)
}, aes, new shim.TextEncoder().encode(msg)))
const r = 'SEA'+JSON.stringify({
ct: shim.Buffer.from(ct, 'binary').toString('utf8'),
iv: rand.iv.toString('utf8'),
s: rand.s.toString('utf8')
});
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
SEA.err = e;
if(cb){ cb() }
return;
}}
module.exports = SEA.encrypt;
})(USE, './encrypt');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
var aeskey = USE('./aeskey');
var parse = USE('./parse');
SEA.decrypt = async (data, pair, cb, opt) => { try {
var opt = opt || {};
const key = pair.epriv || pair;
const json = parse(data)
const ct = await aeskey(key, shim.Buffer.from(json.s, 'utf8'), opt)
.then((aes) => shim.subtle.decrypt({ // Keeping aesKey scope as private as possible...
name: opt.name || 'AES-GCM', iv: new Uint8Array(shim.Buffer.from(json.iv, 'utf8'))
}, aes, new Uint8Array(shim.Buffer.from(json.ct, 'utf8'))))
const r = parse(new shim.TextDecoder('utf8').decode(ct))
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
SEA.err = e;
if(cb){ cb() }
return;
}}
module.exports = SEA.decrypt;
})(USE, './decrypt');
;USE(function(module){
var SEA = USE('./root');
var shim = USE('./shim');
var S = USE('./settings');
// Derive shared secret from other's pub and my epub/epriv
SEA.secret = async (key, pair, cb) => { try {
const pub = key.epub || key
const epub = pair.epub
const epriv = pair.epriv
const ecdhSubtle = shim.ossl || shim.subtle
const pubKeyData = keysToEcdhJwk(pub)
const props = Object.assign(
S.ecdh,
{ public: await ecdhSubtle.importKey(...pubKeyData, true, []) }
)
const privKeyData = keysToEcdhJwk(epub, epriv)
const derived = await ecdhSubtle.importKey(...privKeyData, false, ['deriveKey'])
.then(async (privKey) => {
// privateKey scope doesn't leak out from here!
const derivedKey = await ecdhSubtle.deriveKey(props, privKey, { name: 'AES-GCM', length: 256 }, true, [ 'encrypt', 'decrypt' ])
return ecdhSubtle.exportKey('jwk', derivedKey).then(({ k }) => k)
})
const r = derived;
if(cb){ try{ cb(r) }catch(e){console.log(e)} }
return r;
} catch(e) {
SEA.err = e;
if(cb){ cb() }
return;
}}
const keysToEcdhJwk = (pub, d) => { // d === priv
//const [ x, y ] = Buffer.from(pub, 'base64').toString('utf8').split(':') // old
const [ x, y ] = pub.split('.') // new
const jwk = d ? { d: d } : {}
return [ // Use with spread returned value...
'jwk',
Object.assign(
jwk,
{ x: x, y: y, kty: 'EC', crv: 'P-256', ext: true }
), // ??? refactor
S.ecdh
]
}
module.exports = SEA.secret;
})(USE, './secret');
;USE(function(module){
// Old Code...
const __gky10 = USE('./shim')
const crypto = __gky10.crypto
const subtle = __gky10.subtle
const ossl = __gky10.ossl
const TextEncoder = __gky10.TextEncoder
const TextDecoder = __gky10.TextDecoder
const getRandomBytes = __gky10.random
const EasyIndexedDB = USE('./indexed')
const Buffer = USE('./buffer')
var settings = USE('./settings');
const __gky11 = USE('./settings')
const pbKdf2 = __gky11.pbkdf2
const ecdsaKeyProps = __gky11.ecdsa.pair
const ecdsaSignProps = __gky11.ecdsa.sign
const ecdhKeyProps = __gky11.ecdh
const keysToEcdsaJwk = __gky11.jwk
const sha1hash = USE('./sha1')
const sha256hash = USE('./sha256')
const recallCryptoKey = USE('./remember')
const parseProps = USE('./parse')
// Practical examples about usage found from ./test/common.js
const SEA = USE('./root');
SEA.work = USE('./work');
SEA.sign = USE('./sign');
SEA.verify = USE('./verify');
SEA.encrypt = USE('./encrypt');
SEA.decrypt = USE('./decrypt');
SEA.random = getRandomBytes;
// This is easy way to use IndexedDB, all methods are Promises
// Note: Not all SEA interfaces have to support this.
SEA.EasyIndexedDB = EasyIndexedDB;
// This is Buffer used in SEA and usable from Gun/SEA application also.
// For documentation see https://nodejs.org/api/buffer.html
SEA.Buffer = Buffer;
// These SEA functions support now ony Promises or
// async/await (compatible) code, use those like Promises.
//
// Creates a wrapper library around Web Crypto API
// for various AES, ECDSA, PBKDF2 functions we called above.
// Calculate public key KeyID aka PGPv4 (result: 8 bytes as hex string)
SEA.keyid = async (pub) => {
try {
// base64('base64(x):base64(y)') => Buffer(xy)
const pb = Buffer.concat(
Buffer.from(pub, 'base64').toString('utf8').split(':')
.map((t) => Buffer.from(t, 'base64'))
)
// id is PGPv4 compliant raw key
const id = Buffer.concat([
Buffer.from([0x99, pb.length / 0x100, pb.length % 0x100]), pb
])
const sha1 = await sha1hash(id)
const hash = Buffer.from(sha1, 'binary')
return hash.toString('hex', hash.length - 8) // 16-bit ID as hex
} catch (e) {
console.log(e)
throw e
}
}
// all done!
// Obviously it is missing MANY necessary features. This is only an alpha release.
// Please experiment with it, audit what I've done so far, and complain about what needs to be added.
// SEA should be a full suite that is easy and seamless to use.
// Again, scroll naer the top, where I provide an EXAMPLE of how to create a user and sign in.
// Once logged in, the rest of the code you just read handled automatically signing/validating data.
// But all other behavior needs to be equally easy, like opinionated ways of
// Adding friends (trusted public keys), sending private messages, etc.
// Cheers! Tell me what you think.
var Gun = (SEA.window||{}).Gun || require('./gun');
Gun.SEA = SEA;
SEA.Gun = Gun;
module.exports = SEA
})(USE, './sea');
;USE(function(module){
var SEA = USE('./sea');
var Gun = SEA.Gun;
// This is internal func queries public key(s) for alias.
const queryGunAliases = (alias, gunRoot) => new Promise((resolve, reject) => {
// load all public keys associated with the username alias we want to log in with.
gunRoot.get('~@'+alias).get((rat, rev) => {
rev.off();
if (!rat.put) {
// if no user, don't do anything.
const err = 'No user!'
Gun.log(err)
return reject({ err })
}
// then figuring out all possible candidates having matching username
const aliases = []
let c = 0
// TODO: how about having real chainable map without callback ?
Gun.obj.map(rat.put, (at, pub) => {
if (!pub.slice || '~' !== pub.slice(0, 1)) {
// TODO: ... this would then be .filter((at, pub))
return
}
++c
// grab the account associated with this public key.
gunRoot.get(pub).get((at, ev) => {
pub = pub.slice(1)
ev.off()
--c
if (at.put){
aliases.push({ pub, at })
}
if (!c && (c = -1)) {
resolve(aliases)
}
})
})
if (!c) {
reject({ err: 'Public key does not exist!' })
}
})
})
module.exports = queryGunAliases
})(USE, './query');
;USE(function(module){
var SEA = USE('./sea');
var Gun = SEA.Gun;
const queryGunAliases = USE('./query')
const parseProps = USE('./parse')
// This is internal User authentication func.
const authenticate = async (alias, pass, gunRoot) => {
// load all public keys associated with the username alias we want to log in with.
const aliases = (await queryGunAliases(alias, gunRoot))
.filter(({ pub, at: { put } = {} } = {}) => !!pub && !!put)
// Got any?
if (!aliases.length) {
throw { err: 'Public key does not exist!' }
}
let err
// then attempt to log into each one until we find ours!
// (if two users have the same username AND the same password... that would be bad)
const [ user ] = await Promise.all(aliases.map(async ({ at: at, pub: pub }) => {
// attempt to PBKDF2 extend the password with the salt. (Verifying the signature gives us the plain text salt.)
const auth = parseProps(at.put.auth)
// NOTE: aliasquery uses `gun.get` which internally SEA.read verifies the data for us, so we do not need to re-verify it here.
// SEA.verify(at.put.auth, pub).then(function(auth){
try {
const proof = await SEA.work(pass, auth.s)
const props = { pub: pub, proof: proof, at: at }
// the proof of work is evidence that we've spent some time/effort trying to log in, this slows brute force.
/*
MARK TO @mhelander : pub vs epub!???
*/
const salt = auth.salt
const sea = await SEA.decrypt(auth.ek, proof)
if (!sea) {
err = 'Failed to decrypt secret!'
return
}
// now we have AES decrypted the private key, from when we encrypted it with the proof at registration.
// if we were successful, then that meanswe're logged in!
const priv = sea.priv
const epriv = sea.epriv
const epub = at.put.epub
// TODO: 'salt' needed?
err = null
if(typeof window !== 'undefined'){
var tmp = window.sessionStorage;
if(tmp && gunRoot._.opt.remember){
window.sessionStorage.alias = alias;
window.sessionStorage.tmp = pass;
}
}
return Object.assign(props, { priv: priv, salt: salt, epub: epub, epriv: epriv })
} catch (e) {
err = 'Failed to decrypt secret!'
throw { err }
}
}))
if (!user) {
throw { err: err || 'Public key does not exist!' }
}
return user
}
module.exports = authenticate;
})(USE, './authenticate');
;USE(function(module){
const authsettings = USE('./settings')
const SEA = USE('./sea');
const Gun = SEA.Gun;
//const { scope: seaIndexedDb } = USE('./indexed')
// This updates sessionStorage & IndexedDB to persist authenticated "session"
const updateStorage = (proof, key, pin) => async (props) => {
if (!Gun.obj.has(props, 'alias')) {
return // No 'alias' - we're done.
}
if (authsettings.validity && proof && Gun.obj.has(props, 'iat')) {
props.proof = proof
delete props.remember // Not stored if present
const alias = props.alias
const id = props.alias
const remember = { alias: alias, pin: pin }
try {
const signed = await SEA.sign(JSON.stringify(remember), key)
sessionStorage.setItem('user', alias)
sessionStorage.setItem('remember', signed)
const encrypted = await SEA.encrypt(props, pin)
if (encrypted) {
const auth = await SEA.sign(encrypted, key)
await seaIndexedDb.wipe() // NO! Do not do this. It ruins other people's sessionStorage code. This is bad/wrong, commenting it out.
await seaIndexedDb.put(id, { auth: auth })
}
return props
} catch (err) {
throw { err: 'Session persisting failed!' }
}
}
// Wiping IndexedDB completely when using random PIN
await seaIndexedDb.wipe() // NO! Do not do this. It ruins other people's sessionStorage code. This is bad/wrong, commenting it out.
// And remove sessionStorage data
sessionStorage.removeItem('user')
sessionStorage.removeItem('remember')
return props
}
module.exports = updateStorage
})(USE, './update');
;USE(function(module){
const SEA = USE('./sea');
const Gun = SEA.Gun;
const Buffer = USE('./buffer')
const authsettings = USE('./settings')
const updateStorage = USE('./update')
// This internal func persists User authentication if so configured
const authPersist = async (user, proof, opts) => {
// opts = { pin: 'string' }
// no opts.pin then uses random PIN
// How this works:
// called when app bootstraps, with wanted options
// IF authsettings.validity === 0 THEN no remember-me, ever
// IF PIN then signed 'remember' to window.sessionStorage and 'auth' to IndexedDB
const pin = Buffer.from(
(Gun.obj.has(opts, 'pin') && opts.pin) || Gun.text.random(10),
'utf8'
).toString('base64')
const alias = user.alias
const exp = authsettings.validity // seconds // @mhelander what is `exp`???
if (proof && alias && exp) {
const iat = Math.ceil(Date.now() / 1000) // seconds
const remember = Gun.obj.has(opts, 'pin') || undefined // for hook - not stored
const props = authsettings.hook({ alias: alias, iat: iat, exp: exp, remember: remember })
const pub = user.pub
const epub = user.epub
const priv = user.sea.priv
const epriv = user.sea.epriv
const key = { pub: pub, priv: priv, epub: epub, epriv: epriv }
if (props instanceof Promise) {
const asyncProps = await props.then()
return await updateStorage(proof, key, pin)(asyncProps)
}
return await updateStorage(proof, key, pin)(props)
}
return await updateStorage()({ alias: 'delete' })
}
module.exports = authPersist
})(USE, './persist');
;USE(function(module){
const authPersist = USE('./persist')
// This internal func finalizes User authentication
const finalizeLogin = async (alias, key, gunRoot, opts) => {
const user = gunRoot._.user
// add our credentials in-memory only to our root gun instance
//var tmp = user._.tag;
var opt = user._.opt;
user._ = key.at.$._;
user._.opt = opt;
//user._.tag = tmp || user._.tag;
// so that way we can use the credentials to encrypt/decrypt data
// that is input/output through gun (see below)
const pub = key.pub
const priv = key.priv
const epub = key.epub
const epriv = key.epriv
user._.is = user.is = {alias: alias, pub: pub};
Object.assign(user._, { alias: alias, pub: pub, epub: epub, sea: { pub: pub, priv: priv, epub: epub, epriv: epriv } })
//console.log("authorized", user._);
// persist authentication
//await authPersist(user._, key.proof, opts) // temporarily disabled
// emit an auth event, useful for page redirects and stuff.
try {
gunRoot._.on('auth', user._)
} catch (e) {
console.log('Your \'auth\' callback crashed with:', e)
}
// returns success with the user data credentials.
return user._
}
module.exports = finalizeLogin
})(USE, './login');
;USE(function(module){
const Buffer = USE('./buffer')
const authsettings = USE('./settings')
//const { scope: seaIndexedDb } = USE('./indexed')
const queryGunAliases = USE('./query')
const parseProps = USE('./parse')
const updateStorage = USE('./update')
const SEA = USE('./sea')
const Gun = SEA.Gun;
const finalizeLogin = USE('./login')
// This internal func recalls persisted User authentication if so configured
const authRecall = async (gunRoot, authprops) => {
// window.sessionStorage only holds signed { alias, pin } !!!
const remember = authprops || sessionStorage.getItem('remember')
const { alias = sessionStorage.getItem('user'), pin: pIn } = authprops || {} // @mhelander what is pIn?
const pin = pIn && Buffer.from(pIn, 'utf8').toString('base64')
// Checks for existing proof, matching alias and expiration:
const checkRememberData = async ({ proof, alias: aLias, iat, exp, remember }) => {
if (!!proof && alias === aLias) {
const checkNotExpired = (args) => {
if (Math.floor(Date.now() / 1000) < (iat + args.exp)) {
// No way hook to update 'iat'
return Object.assign(args, { iat: iat, proof: proof })
} else {
Gun.log('Authentication expired!')
}
}
// We're not gonna give proof to hook!
const hooked = authsettings.hook({ alias: alias, iat: iat, exp: exp, remember: remember })
return ((hooked instanceof Promise)
&& await hooked.then(checkNotExpired)) || checkNotExpired(hooked)
}
}
const readAndDecrypt = async (data, pub, key) =>
parseProps(await SEA.decrypt(await SEA.verify(data, pub), key))
// Already authenticated?
if (gunRoot._.user
&& Gun.obj.has(gunRoot._.user._, 'pub')
&& Gun.obj.has(gunRoot._.user._, 'sea')) {
return gunRoot._.user._ // Yes, we're done here.
}
// No, got persisted 'alias'?
if (!alias) {
throw { err: 'No authentication session found!' }
}
// Yes, got persisted 'remember'?
if (!remember) {
throw { // And return proof if for matching alias
err: (await seaIndexedDb.get(alias, 'auth') && authsettings.validity
&& 'Missing PIN and alias!') || 'No authentication session found!'
}
}
// Yes, let's get (all?) matching aliases
const aliases = (await queryGunAliases(alias, gunRoot))
.filter(({ pub } = {}) => !!pub)
// Got any?
if (!aliases.length) {
throw { err: 'Public key does not exist!' }
}
let err
// Yes, then attempt to log into each one until we find ours!
// (if two users have the same username AND the same password... that would be bad)
const [ { key, at, proof, pin: newPin } = {} ] = await Promise
.all(aliases.filter(({ at: { put } = {} }) => !!put)
.map(async ({ at: at, pub: pub }) => {
const readStorageData = async (args) => {
const props = args || parseProps(await SEA.verify(remember, pub, true))
let pin = props.pin
let aLias = props.alias
const data = (!pin && alias === aLias)
// No PIN, let's try short-term proof if for matching alias
? await checkRememberData(props)
// Got PIN so get IndexedDB secret if signature is ok
: await checkRememberData(await readAndDecrypt(await seaIndexedDb.get(alias, 'auth'), pub, pin))
pin = pin || data.pin
delete data.pin
return { pin: pin, data: data }
}
// got pub, try auth with pin & alias :: or unwrap Storage data...
const __gky20 = await readStorageData(pin && { pin, alias })
const data = __gky20.data
const newPin = __gky20.pin
const proof = data.proof
if (!proof) {
if (!data) {
err = 'No valid authentication session found!'
return
}
try { // Wipes IndexedDB silently
await updateStorage()(data)
} catch (e) {} //eslint-disable-line no-empty
err = 'Expired session!'
return
}
try { // auth parsing or decryption fails or returns empty - silently done
const auth= at.put.auth.auth
const sea = await SEA.decrypt(auth, proof)
if (!sea) {
err = 'Failed to decrypt private key!'
return
}
const priv = sea.priv
const epriv = sea.epriv
const epub = at.put.epub
// Success! we've found our private data!