Fix now-broken test cases and change lots of things over to promises
This commit is contained in:
parent
41d50d7480
commit
3fffbad11a
4 changed files with 140 additions and 138 deletions
195
js/helpers.js
195
js/helpers.js
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@ -97,12 +97,13 @@ var USE_NACL = false;
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*** Type conversion utilities ***
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*********************************/
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function intToArrayBuffer(nInt) {
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return new ArrayBuffer([
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(nInt >> 24) && 0xFF,
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(nInt >> 16) && 0xFF,
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(nInt >> 8) && 0xFF,
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nInt && 0xFF
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]);
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var res = new ArrayBuffer(4);
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var thing = new Uint8Array(res);
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thing[0] = (nInt >> 24) & 0xff;
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thing[1] = (nInt >> 16) & 0xff;
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thing[2] = (nInt >> 8 ) & 0xff;
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thing[3] = (nInt >> 0 ) & 0xff;
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return res;
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}
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// Strings/arrays
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@ -160,6 +161,12 @@ function toArrayBuffer(thing) {
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return res;
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}
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function assertIsArrayBuffer(thing) {
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if (thing !== Object(thing) || thing.__proto__ != StaticArrayBufferProto)
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console.log("WARNING: Needed a ArrayBuffer");
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return toArrayBuffer(thing);
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}
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function ensureStringed(thing) {
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if (getStringable(thing))
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return getString(thing);
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@ -433,7 +440,7 @@ function getRandomBytes(size) {
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var crypto_tests = {};
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(function(crypto, $, undefined) {
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crypto_tests.privToPub = function(privKey, isIdentity, callback) {
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crypto_tests.privToPub = function(privKey, isIdentity) {
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if (privKey.byteLength != 32)
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throw new Error("Invalid private key");
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@ -448,12 +455,14 @@ var crypto_tests = {};
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}
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if (USE_NACL) {
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postNaclMessage({command: "bytesToPriv", priv: privKey}, function(message) {
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var priv = message.res;
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if (!isIdentity)
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new Uint8Array(priv)[0] |= 0x01;
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postNaclMessage({command: "privToPub", priv: priv}, function(message) {
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callback({ pubKey: prependVersion(message.res), privKey: priv });
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return new Promise(function(resolve) {
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postNaclMessage({command: "bytesToPriv", priv: privKey}, function(message) {
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var priv = message.res;
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if (!isIdentity)
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new Uint8Array(priv)[0] |= 0x01;
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postNaclMessage({command: "privToPub", priv: priv}, function(message) {
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resolve({ pubKey: prependVersion(message.res), privKey: priv });
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});
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});
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});
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} else {
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@ -466,21 +475,21 @@ var crypto_tests = {};
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priv[0] |= 0x0001;
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//TODO: fscking type conversion
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callback({ pubKey: prependVersion(toArrayBuffer(curve25519(priv))), privKey: privKey});
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return new Promise(function(resolve) { resolve({ pubKey: prependVersion(toArrayBuffer(curve25519(priv))), privKey: privKey}); });
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}
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}
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var privToPub = function(privKey, isIdentity, callback) { return crypto_tests.privToPub(privKey, isIdentity, callback); }
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crypto_tests.createNewKeyPair = function(isIdentity, callback) {
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return privToPub(getRandomBytes(32), isIdentity, callback);
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crypto_tests.createNewKeyPair = function(isIdentity) {
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return privToPub(getRandomBytes(32), isIdentity);
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}
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var createNewKeyPair = function(isIdentity, callback) { return crypto_tests.createNewKeyPair(isIdentity, callback); }
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var createNewKeyPair = function(isIdentity) { return crypto_tests.createNewKeyPair(isIdentity); }
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var crypto_storage = {};
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crypto_storage.getNewPubKeySTORINGPrivKey = function(keyName, isIdentity, callback) {
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createNewKeyPair(isIdentity, function(keyPair) {
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createNewKeyPair(isIdentity).then(function(keyPair) {
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storage.putEncrypted("25519Key" + keyName, keyPair);
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callback(keyPair.pubKey);
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});
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@ -525,7 +534,7 @@ var crypto_tests = {};
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*****************************/
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//TODO: Think about replacing CryptoJS stuff with optional NaCL-based implementations
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// Probably means all of the low-level crypto stuff here needs pulled out into its own file
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crypto_tests.ECDHE = function(pubKey, privKey, callback) {
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crypto_tests.ECDHE = function(pubKey, privKey) {
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if (privKey !== undefined) {
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privKey = toArrayBuffer(privKey);
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if (privKey.byteLength != 32)
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@ -545,15 +554,17 @@ var crypto_tests = {};
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throw new Error("Invalid public key");
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}
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if (USE_NACL) {
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postNaclMessage({command: "ECDHE", priv: privKey, pub: pubKey}, function(message) {
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callback(message.res);
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});
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} else {
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callback(toArrayBuffer(curve25519(new Uint16Array(privKey), new Uint16Array(pubKey))));
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}
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return new Promise(function(resolve) {
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if (USE_NACL) {
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postNaclMessage({command: "ECDHE", priv: privKey, pub: pubKey}, function(message) {
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resolve(message.res);
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});
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} else {
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resolve(toArrayBuffer(curve25519(new Uint16Array(privKey), new Uint16Array(pubKey))));
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}
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});
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}
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var ECDHE = function(pubKey, privKey, callback) { return crypto_tests.ECDHE(pubKey, privKey, callback); }
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var ECDHE = function(pubKey, privKey) { return crypto_tests.ECDHE(pubKey, privKey); }
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crypto_tests.HKDF = function(input, salt, info) {
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// Specific implementation of RFC 5869 that only returns exactly 64 bytes
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@ -589,7 +600,7 @@ var crypto_tests = {};
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if (version === undefined)
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version = 1;
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HmacSHA256(key, String.fromCharCode(version) + getString(data)).then(function(calculated_mac) {
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return HmacSHA256(key, String.fromCharCode(version) + getString(data)).then(function(calculated_mac) {
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var macString = getString(mac);
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if (calculated_mac.substring(0, macString.length) != macString)
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@ -607,33 +618,32 @@ var crypto_tests = {};
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/******************************
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*** Ratchet implementation ***
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******************************/
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var calculateRatchet = function(session, remoteKey, sending, callback) {
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var calculateRatchet = function(session, remoteKey, sending) {
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var ratchet = session.currentRatchet;
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ECDHE(remoteKey, ratchet.ephemeralKeyPair.privKey, function(sharedSecret) {
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HKDF(sharedSecret, ratchet.rootKey, "WhisperRatchet").then(function(masterKey) {
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return ECDHE(remoteKey, ratchet.ephemeralKeyPair.privKey).then(function(sharedSecret) {
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return HKDF(sharedSecret, ratchet.rootKey, "WhisperRatchet").then(function(masterKey) {
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if (sending)
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session[getString(ratchet.ephemeralKeyPair.pubKey)] = { messageKeys: {}, chainKey: { counter: -1, key: masterKey[1] } };
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else
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session[getString(remoteKey)] = { messageKeys: {}, chainKey: { counter: -1, key: masterKey[1] } };
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ratchet.rootKey = masterKey[0];
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callback();
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});
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});
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}
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var initSession = function(isInitiator, ourEphemeralKey, encodedNumber, theirIdentityPubKey, theirEphemeralPubKey, callback) {
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var initSession = function(isInitiator, ourEphemeralKey, encodedNumber, theirIdentityPubKey, theirEphemeralPubKey) {
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var ourIdentityPrivKey = crypto_storage.getIdentityPrivKey();
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var sharedSecret;
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ECDHE(theirEphemeralPubKey, ourIdentityPrivKey, function(ecRes) {
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return ECDHE(theirEphemeralPubKey, ourIdentityPrivKey).then(function(ecRes) {
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sharedSecret = getString(ecRes);
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function finishInit() {
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ECDHE(theirEphemeralPubKey, ourEphemeralKey.privKey, function(ecRes) {
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return ECDHE(theirEphemeralPubKey, ourEphemeralKey.privKey).then(function(ecRes) {
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sharedSecret += getString(ecRes);
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HKDF(sharedSecret, '', "WhisperText").then(function(masterKey) {
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return HKDF(toArrayBuffer(sharedSecret), '', "WhisperText").then(function(masterKey) {
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var session = {currentRatchet: { rootKey: masterKey[0], lastRemoteEphemeralKey: theirEphemeralPubKey },
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oldRatchetList: []
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};
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@ -641,50 +651,42 @@ var crypto_tests = {};
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// If we're initiating we go ahead and set our first sending ephemeral key now,
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// otherwise we figure it out when we first maybeStepRatchet with the remote's ephemeral key
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if (isInitiator) {
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createNewKeyPair(false, function(ourSendingEphemeralKey) {
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return createNewKeyPair(false).then(function(ourSendingEphemeralKey) {
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session.currentRatchet.ephemeralKeyPair = ourSendingEphemeralKey;
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calculateRatchet(session, theirEphemeralPubKey, true, function() {
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return calculateRatchet(session, theirEphemeralPubKey, true).then(function() {
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crypto_storage.saveSession(encodedNumber, session);
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callback();
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});
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});
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} else {
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session.currentRatchet.ephemeralKeyPair = ourEphemeralKey;
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crypto_storage.saveSession(encodedNumber, session);
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callback();
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}
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});
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});
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}
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if (isInitiator) {
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ECDHE(theirIdentityPubKey, ourEphemeralKey.privKey, function(ecRes) {
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if (isInitiator)
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return ECDHE(theirIdentityPubKey, ourEphemeralKey.privKey).then(function(ecRes) {
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sharedSecret = sharedSecret + getString(ecRes);
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finishInit();
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});
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} else {
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ECDHE(theirIdentityPubKey, ourEphemeralKey.privKey, function(ecRes) {
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}).then(finishInit);
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else
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return ECDHE(theirIdentityPubKey, ourEphemeralKey.privKey).then(function(ecRes) {
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sharedSecret = getString(ecRes) + sharedSecret;
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finishInit();
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});
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}
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}).then(finishInit);
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});
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}
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var initSessionFromPreKeyWhisperMessage = function(encodedNumber, message, callback) {
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var initSessionFromPreKeyWhisperMessage = function(encodedNumber, message) {
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//TODO: Check remote identity key matches known-good key
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var preKeyPair = crypto_storage.getAndRemovePreKeyPair(message.preKeyId);
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if (preKeyPair === undefined) {
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if (crypto_storage.getSession(encodedNumber) !== undefined)
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callback();
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return new Promise(function(resolve) { resolve() });
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else
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throw new Error("Missing preKey for PreKeyWhisperMessage");
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} else {
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initSession(false, preKeyPair, encodedNumber, message.identityKey, message.baseKey, function() {
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callback();
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});
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}
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} else
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return initSession(false, preKeyPair, encodedNumber, message.identityKey, message.baseKey);
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}
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var fillMessageKeys = function(chain, counter) {
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@ -693,28 +695,25 @@ var crypto_tests = {};
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if (chain.chainKey.counter < counter) {
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return HmacSHA256(chain.chainKey.key, String.fromCharCode(1)).then(function(mac) {
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HmacSHA256(chain.chainKey.key, String.fromCharCode(2)).then(function(key) {
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return HmacSHA256(chain.chainKey.key, String.fromCharCode(2)).then(function(key) {
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chain.messageKeys[chain.chainKey.counter + 1] = mac;
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chain.chainKey.key = key
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chain.chainKey.counter += 1;
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fillMessageKeys(chain, counter);//XXX: return?
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return fillMessageKeys(chain, counter);
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});
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});
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} else {
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} else
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return new Promise(function(resolve) { resolve() });
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}
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}
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var maybeStepRatchet = function(session, remoteKey, previousCounter, callback) {
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if (session[getString(remoteKey)] !== undefined) {
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callback();
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return;
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}
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var maybeStepRatchet = function(session, remoteKey, previousCounter) {
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if (session[getString(remoteKey)] !== undefined)
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return new Promise(function(resolve) { resolve() });
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var ratchet = session.currentRatchet;
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var finish = function() {
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calculateRatchet(session, remoteKey, false, function() {
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return calculateRatchet(session, remoteKey, false).then(function() {
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// Now swap the ephemeral key and calculate the new sending chain
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var previousRatchet = getString(ratchet.ephemeralKeyPair.pubKey);
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if (session[previousRatchet] !== undefined) {
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@ -725,11 +724,10 @@ var crypto_tests = {};
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// it should be changed upstream to something more reasonable.
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ratchet.previousCounter = 4294967295;
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createNewKeyPair(false, function(keyPair) {
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return createNewKeyPair(false).then(function(keyPair) {
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ratchet.ephemeralKeyPair = keyPair;
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calculateRatchet(session, remoteKey, true, function() {
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return calculateRatchet(session, remoteKey, true).then(function() {
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ratchet.lastRemoteEphemeralKey = remoteKey;
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callback();
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});
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});
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});
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@ -737,19 +735,18 @@ var crypto_tests = {};
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var previousRatchet = session[getString(ratchet.lastRemoteEphemeralKey)];
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if (previousRatchet !== undefined) {
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fillMessageKeys(previousRatchet, previousCounter).then(function() {
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return fillMessageKeys(previousRatchet, previousCounter).then(function() {
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if (!objectContainsKeys(previousRatchet.messageKeys))
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delete session[getString(ratchet.lastRemoteEphemeralKey)];
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else
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session.oldRatchetList[session.oldRatchetList.length] = { added: new Date().getTime(), ephemeralKey: ratchet.lastRemoteEphemeralKey };
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finish();
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});
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}).then(finish);
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} else
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finish();
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return finish();
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}
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// returns decrypted protobuf
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var decryptWhisperMessage = function(encodedNumber, messageBytes, callback) {
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var decryptWhisperMessage = function(encodedNumber, messageBytes) {
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var session = crypto_storage.getSession(encodedNumber);
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if (session === undefined)
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throw new Error("No session currently open with " + encodedNumber);
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@ -762,22 +759,21 @@ var crypto_tests = {};
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var message = decodeWhisperMessageProtobuf(messageProto);
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maybeStepRatchet(session, message.ephemeralKey, message.previousCounter, function() {
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return maybeStepRatchet(session, message.ephemeralKey, message.previousCounter).then(function() {
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var chain = session[getString(message.ephemeralKey)];
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fillMessageKeys(chain, message.counter).then(function() {
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HKDF(chain.messageKeys[message.counter], '', "WhisperMessageKeys").then(function(keys) {
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return fillMessageKeys(chain, message.counter).then(function() {
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return HKDF(chain.messageKeys[message.counter], '', "WhisperMessageKeys").then(function(keys) {
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delete chain.messageKeys[message.counter];
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verifyMACWithVersionByte(messageProto, keys[1], mac, (2 << 4) | 2);
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var iv = getString(intToArrayBuffer(message.counter));
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decryptAESCTR(message.ciphertext, keys[0], iv).then(function(plaintext) {
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return decryptAESCTR(message.ciphertext, keys[0], iv).then(function(plaintext) {
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//TODO: removeOldChains(session);
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delete session['pendingPreKey'];
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crypto_storage.saveSession(encodedNumber, session);
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callback(decodePushMessageContentProtobuf(plaintext));
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return decodePushMessageContentProtobuf(getString(plaintext));
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});
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});
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});
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@ -802,10 +798,10 @@ var crypto_tests = {};
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var ivAndCipherText = decodedMessage.subarray(1, decodedMessage.length - 10);
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var mac = decodedMessage.subarray(decodedMessage.length - 10, decodedMessage.length);
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verifyMACWithVersionByte(ivAndCipherText, mac_key, mac);
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return decryptAESCBC(ciphertext, aes_key, iv);
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}
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return verifyMACWithVersionByte(ivAndCipherText, mac_key, mac).then(function() {
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return decryptAESCBC(ciphertext, aes_key, iv);
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});
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};
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crypto.handleIncomingPushMessageProto = function(proto, callback) {
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switch(proto.type) {
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@ -813,7 +809,7 @@ var crypto_tests = {};
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callback({message: decodePushMessageContentProtobuf(getString(proto.message)), pushMessage:proto});
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break;
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case 1: //TYPE_MESSAGE_CIPHERTEXT
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decryptWhisperMessage(proto.source, getString(proto.message), function(result) {
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decryptWhisperMessage(proto.source, getString(proto.message)).then(function(result) {
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callback({message: result, pushMessage: proto});
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});
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break;
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@ -821,8 +817,8 @@ var crypto_tests = {};
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if (proto.message.readUint8() != (2 << 4 | 2))
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throw new Error("Bad version byte");
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var preKeyProto = decodePreKeyWhisperMessageProtobuf(getString(proto.message));
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initSessionFromPreKeyWhisperMessage(proto.source, preKeyProto, function() {
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decryptWhisperMessage(proto.source, getString(preKeyProto.message), function(result) {
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initSessionFromPreKeyWhisperMessage(proto.source, preKeyProto).then(function() {
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decryptWhisperMessage(proto.source, getString(preKeyProto.message)).then(function(result) {
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callback({message: result, pushMessage: proto});
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});
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});
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@ -834,29 +830,28 @@ var crypto_tests = {};
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crypto.encryptMessageFor = function(deviceObject, pushMessageContent, callback) {
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var session = crypto_storage.getSession(deviceObject.encodedNumber);
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var doEncryptPushMessageContent = function(callback) {
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var doEncryptPushMessageContent = function() {
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var msg = new WhisperMessageProtobuf();
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var plaintext = toArrayBuffer(pushMessageContent.encode());
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msg.ephemeralKey = toArrayBuffer(session.currentRatchet.ephemeralKeyPair.pubKey);
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var chain = session[getString(msg.ephemeralKey)];
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fillMessageKeys(chain, chain.counter + 1).then(function() {
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HKDF(chain.messageKeys[chain.chainKey.counter], '', "WhisperMessageKeys").then(function(keys) {
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return fillMessageKeys(chain, chain.chainKey.counter + 1).then(function() {
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return HKDF(chain.messageKeys[chain.chainKey.counter], '', "WhisperMessageKeys").then(function(keys) {
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delete chain.messageKeys[chain.chainKey.counter];
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msg.counter = chain.chainKey.counter;
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msg.previousCounter = session.currentRatchet.previousCounter;
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var iv = intToArrayBuffer(chain.counter);
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encryptAESCTR(plaintext, keys[0], iv).then(function(ciphertext) {
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var iv = intToArrayBuffer(chain.chainKey.counter);
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return encryptAESCTR(plaintext, keys[0], iv).then(function(ciphertext) {
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msg.ciphertext = ciphertext;
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var encodedMsg = getString(msg.encode());
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calculateMACWithVersionByte(encodedMsg, keys[1], (2 << 4) | 2).then(function(mac) {
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var result = String.fromCharCode((2 << 4) | 2) + encodedMsg + mac.substring(0, 8);
|
||||
|
||||
return calculateMACWithVersionByte(encodedMsg, keys[1], (2 << 4) | 2).then(function(mac) {
|
||||
var result = String.fromCharCode((2 << 4) | 2) + encodedMsg + getString(mac).substring(0, 8);
|
||||
crypto_storage.saveSession(deviceObject.encodedNumber, session);
|
||||
callback(result);
|
||||
return result;
|
||||
});
|
||||
});
|
||||
});
|
||||
|
@ -869,13 +864,13 @@ var crypto_tests = {};
|
|||
preKeyMsg.registrationId = deviceObject.registrationId;
|
||||
|
||||
if (session === undefined) {
|
||||
createNewKeyPair(false, function(baseKey) {
|
||||
createNewKeyPair(false).then(function(baseKey) {
|
||||
preKeyMsg.baseKey = toArrayBuffer(baseKey.pubKey);
|
||||
initSession(true, baseKey, deviceObject.encodedNumber, deviceObject.identityKey, deviceObject.publicKey, function() {
|
||||
initSession(true, baseKey, deviceObject.encodedNumber, deviceObject.identityKey, deviceObject.publicKey).then(function() {
|
||||
//TODO: Delete preKey info on first message received back
|
||||
session = crypto_storage.getSession(deviceObject.encodedNumber);
|
||||
session.pendingPreKey = baseKey.pubKey;
|
||||
doEncryptPushMessageContent(function(message) {
|
||||
doEncryptPushMessageContent().then(function(message) {
|
||||
preKeyMsg.message = toArrayBuffer(message);
|
||||
var result = String.fromCharCode((2 << 4) | 2) + getString(preKeyMsg.encode());
|
||||
callback({type: 3, body: result});
|
||||
|
@ -883,7 +878,7 @@ var crypto_tests = {};
|
|||
});
|
||||
});
|
||||
} else
|
||||
doEncryptPushMessageContent(function(message) {
|
||||
doEncryptPushMessageContent().then(function(message) {
|
||||
if (session.pendingPreKey !== undefined) {
|
||||
preKeyMsg.baseKey = toArrayBuffer(session.pendingPreKey);
|
||||
preKeyMsg.message = toArrayBuffer(message);
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue