verify old user password before proceeding to change passwords

customize.dist/login.js

@@ -46,9 +46,12 @@ define([
         // 32 more for a signing key
         var edSeed = opt.edSeed = dispense(32);
 
-        // 32 more bytes to seed an additional signing key
+        // 64 more bytes to seed an additional signing key
         opt.blockSeed = dispense(64);
 
+        var blockKeys = opt.blockKeys = Block.genkeys(opt.blockSeed);
+        opt.blockHash = Block.getBlockHash(blockKeys);
+
         // derive a private key from the ed seed
         var signingKeypair = Nacl.sign.keyPair.fromSeed(new Uint8Array(edSeed));
 

www/assert/main.js

@@ -10,9 +10,10 @@ define([
     '/common/wire.js',
     '/common/flat-dom.js',
     '/common/media-tag.js',
+    '/common/outer/login-block.js',
 
     '/bower_components/tweetnacl/nacl-fast.min.js',
-], function ($, Hyperjson, Sortify, Drive, Test, Hash, Util, Thumb, Wire, Flat, MediaTag) {
+], function ($, Hyperjson, Sortify, Drive, Test, Hash, Util, Thumb, Wire, Flat, MediaTag, Block) {
     window.Hyperjson = Hyperjson;
     window.Sortify = Sortify;
     var Nacl = window.nacl;
@@ -300,15 +301,12 @@ define([
     }, "test support for ugly tracking query paramaters in url");
 
     assert(function (cb) {
-        var href = 'https://cryptpad.fr/block/pe/pewpewpewpewpew';
-        var key = Nacl.randomBytes(32);
+        var keys = Block.genkeys(Nacl.randomBytes(64));
+        var hash = Block.getBlockHash(keys);
+        var parsed = Block.parseBlockHash(hash);
 
-        var hash = Hash.createBlockHash(href, key);
-
-        var parsed = Hash.parseBlockHash(hash);
-
-        cb(parsed && href === parsed.href &&
-            parsed.keys.symmetric.length === key.length);
+        cb(parsed &&
+            parsed.keys.symmetric.length === keys.symmetric.length);
     }, 'parse a block hash');
 
     assert(function (cb) {

www/common/common-hash.js

@@ -474,43 +474,6 @@ Version 1
             '/' + curvePublic.replace(/\//g, '-') + '/';
     };
 
-    // XXX consider putting Block functions in /common/outer/login-block.js
-    Hash.createBlockHash = function (href, key) {
-        if (typeof(href) !== 'string') { return; }
-        if (!(key instanceof Uint8Array)) { return; }
-
-        // TODO verify inputs
-        try { return href + '#' + Nacl.util.encodeBase64(key); }
-        catch (e) { return; }
-    };
-
-    var decodeSafeB64 = function (b64) {
-        try {
-            return Nacl.util.decodeBase64(b64.replace(/\-/g, '/'));
-        } catch (e) {
-            console.error(e);
-            return;
-        }
-    };
-
-    Hash.parseBlockHash = function (hash) {
-        if (typeof(hash) !== 'string') { return; }
-        var parts = hash.split('#');
-        if (parts.length !== 2) { return; }
-
-        try {
-            return {
-                href: parts[0],
-                keys: {
-                    symmetric: decodeSafeB64(parts[1]),
-                }
-            };
-        } catch (e) {
-            console.error(e);
-            return;
-        }
-    };
-
     // Create untitled documents when no name is given
     var getLocaleDate = function () {
         if (window.Intl && window.Intl.DateTimeFormat) {

www/common/cryptpad-common.js

@@ -713,10 +713,9 @@ define([
         var newHash, newHref, newSecret, newBlockSeed;
         var oldIsOwned = false;
 
-        // XXX ansuz: check that the old password is correct
-        throw new Error("XXX");
-
         var blockHash = LocalStore.getBlockHash();
+        var oldBlockKeys;
+
         var Cred, Block, Login;
         Nthen(function (waitFor) {
             require([
@@ -728,6 +727,30 @@ define([
                 Block = _Block;
                 Login = _Login;
             }));
+        }).nThen(function (waitFor) {
+            // confirm that the provided password is correct
+            Cred.deriveFromPassphrase(accountName, password, Login.requiredBytes, waitFor(function (bytes) {
+                var allocated = Login.allocateBytes(bytes);
+                oldBlockKeys = allocated.blockKeys;
+                if (blockHash) {
+                    if (blockHash !== allocated.blockHash) {
+                        // incorrect password probably
+                        waitFor.abort();
+                        return void cb({
+                            error: 'INVALID_PASSWORD',
+                        });
+                    }
+                    // the user has already created a block, so you should compare against that
+                } else {
+                    // otherwise they're a legacy user, and we should check against the User_hash
+                    if (hash !== allocated.userHash) {
+                        waitFor.abort();
+                        return void cb({
+                            error: 'INVALID_PASSWORD',
+                        });
+                    }
+                }
+            }));
         }).nThen(function (waitFor) {
             // Check if our drive is already owned
             common.anonRpcMsg('GET_METADATA', secret.channel, waitFor(function (err, obj) {
@@ -789,7 +812,7 @@ define([
         }).nThen(function (waitFor) {
             // Remove block hash
             if (blockHash) {
-                var removeData = Block.remove(keys);
+                var removeData = Block.remove(oldBlockKeys);
                 common.removeLoginBlock(removeData, waitFor(function (obj) {
                     if (obj && obj.error) { return void console.error(obj.error); }
                 }));
@@ -1051,13 +1074,6 @@ define([
                 }));
             }
         }).nThen(function (waitFor) {
-            // XXX debugging
-            if (LocalStore.getUserHash()) {
-                console.log('User_hash detected');
-            } else {
-                console.log("User_hash not detected");
-            }
-
             var cfg = {
                 init: true,
                 //query: onMessage, // TODO temporary, will be replaced by a webworker channel

www/common/outer/login-block.js

@@ -104,10 +104,50 @@ define([
 
     Block.getBlockHash = function (keys) {
         var publicKey = urlSafeB64(keys.sign.publicKey);
-        var relative = 'block/' + publicKey.slice(0, 2) + '/' +  publicKey; // XXX FIXME use configurable path from /api/config
+        // 'block/' here is hardcoded because it's hardcoded on the server
+        // if we want to make CryptPad work in server subfolders, we'll need
+        // to update this path derivation
+        var relative = 'block/' + publicKey.slice(0, 2) + '/' +  publicKey;
         var symmetric = urlSafeB64(keys.symmetric);
         return ApiConfig.httpUnsafeOrigin + relative + '#' + symmetric;
     };
 
+/*
+    Block.createBlockHash = function (href, key) {
+        if (typeof(href) !== 'string') { return; }
+        if (!(key instanceof Uint8Array)) { return; }
+
+        try { return href + '#' + Nacl.util.encodeBase64(key); }
+        catch (e) { return; }
+    };
+*/
+
+    var decodeSafeB64 = function (b64) {
+        try {
+            return Nacl.util.decodeBase64(b64.replace(/\-/g, '/'));
+        } catch (e) {
+            console.error(e);
+            return;
+        }
+    };
+
+    Block.parseBlockHash = function (hash) {
+        if (typeof(hash) !== 'string') { return; }
+        var parts = hash.split('#');
+        if (parts.length !== 2) { return; }
+
+        try {
+            return {
+                href: parts[0],
+                keys: {
+                    symmetric: decodeSafeB64(parts[1]),
+                }
+            };
+        } catch (e) {
+            console.error(e);
+            return;
+        }
+    };
+
     return Block;
 });