nodejs+postgresql backend

9 files changed, 691 insertions, 0 deletions

diff --git a/backend/node/properties/node.properties.json b/backend/node/properties/node.properties.json
new file mode 100644
index 0000000..b5ecc1e
--- a/dev/null
+++ b/backend/node/properties/node.properties.json
@@ -0,0 +1,5 @@
+{
+	"request.path": "/json",
+	"dump.path": "/dump",
+	"should.pay.toll": "false"
+}
diff --git a/backend/node/src/app.js b/backend/node/src/app.js
new file mode 100644
index 0000000..d4d60c2
--- a/dev/null
+++ b/backend/node/src/app.js
@@ -0,0 +1,49 @@
+var BUNYAN = require('bunyan');
+var LOGGER = BUNYAN.createLogger({
+ name: 'clipperz',
+ streams: [
+  { name: "console", stream:process.stderr,level:'trace'}
+ ],
+ serializers: {
+  req: BUNYAN.stdSerializers.req,
+  res: BUNYAN.stdSerializers.res,
+  err: BUNYAN.stdSerializers.err
+ },
+ src: true
+});
+
+
+var EXPRESS = require('express');
+var HTTP = require('http');
+var PATH = require('path');
+
+var app = EXPRESS();
+
+app.set('port', process.env.PORT || 3000);
+app.use(EXPRESS.logger('dev'));
+app.use(EXPRESS.urlencoded());
+app.use(EXPRESS.methodOverride());
+app.use(EXPRESS.cookieParser('your secret here'));
+app.use(EXPRESS.session());
+app.use(app.router);
+app.use(EXPRESS.static(PATH.join(__dirname, 'htdocs/')));
+if ('development' == app.get('env')) {
+  app.use(EXPRESS.errorHandler());
+}
+
+
+var CLIPPERZ = require('./clipperz');
+var CONF = require('./conf');
+var clipperz = CLIPPERZ({
+ psql: CONF.psql||'postgresql:///clipperz',
+ logger: LOGGER,
+ dump_template: PATH.join(__dirname,'htdocs/beta/index.html')
+});
+
+app.post('/json',clipperz.json);
+app.get('/beta/dump',clipperz.dump);
+
+
+HTTP.createServer(app).listen(app.get('port'), function(){
+ LOGGER.info({port:app.get('port')},"Listener established");
+});
diff --git a/backend/node/src/clipperz.data.sql b/backend/node/src/clipperz.data.sql
new file mode 100644
index 0000000..482b196
--- a/dev/null
+++ b/backend/node/src/clipperz.data.sql
@@ -0,0 +1,5 @@
+INSERT INTO clipperz.otpstatus (otps_code,otps_name,otps_desc) VALUES
+ ('ACTIVE','Active','Active'),
+ ('REQUESTED','Requested','Requested'),
+ ('USED','Used','Used'),
+ ('DISABLED','Disabled','Disabled');
diff --git a/backend/node/src/clipperz.js b/backend/node/src/clipperz.js
new file mode 100644
index 0000000..6c13f16
--- a/dev/null
+++ b/backend/node/src/clipperz.js
@@ -0,0 +1,537 @@
+var FS = require('fs');
+var CRYPTO = require('crypto');
+var BIGNUM = require('bignum');
+var ASYNC = require('async');
+
+function clipperz_hash(v) {
+ return CRYPTO.createHash('sha256').update(
+  CRYPTO.createHash('sha256').update(v).digest('binary')
+ ).digest('hex');
+};
+function clipperz_random() {
+ for(var r = '';r.length<64;r+=''+BIGNUM(Math.floor(Math.random()*1e18)).toString(16));
+ return r.substr(0,64);
+};
+var srp_g = BIGNUM(2);
+var srp_n = BIGNUM("115b8b692e0e045692cf280b436735c77a5a9e8a9e7ed56c965f87db5b2a2ece3",16);
+var n123 = '112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00';
+
+
+var CLIPPERZ = module.exports = function(CONFIG) {
+
+ var LOGGER = CONFIG.logger||{trace:function(){}};
+
+ var PG = {
+  url: CONFIG.psql,
+  PG: require('pg').native,
+  Q: function(q,a,cb) {
+   if('function'===typeof a) cb=a,a=[];
+   LOGGER.trace({query:q,args:a},'SQL: %s',q);
+   PG.PG.connect(PG.url,function(e,C,D) {
+	if(e) return cb(e);
+	var t0=new Date();
+	C.query(q,a,function(e,r) {
+	 var t1=new Date(), dt=t1-t0;
+	 D();
+	 LOGGER.trace({query:q,args:a,ms:dt,rows:r&&r.rowCount},"SQL query '%s' took %dms",q,dt);
+	 cb(e,r);
+	});
+   });
+  },
+  T: function(cb) {
+   PG.PG.connect(PG.url,function(e,C,D) {
+	if(e) return cb(e);
+	C.query('BEGIN',function(e){
+	 if(e) return D(),cb(e);
+	 cb(null,{
+	  Q: function(q,a,cb) {
+	   LOGGER.trace({query:q,args:a},'SQL: %s',q);
+	   if(this.over) return cb(new Error('game over'));
+	   if('function'===typeof a) cb=a,a=[];
+	   var t0=new Date();
+	   C.query(q,a,function(e,r) {
+		var t1=new Date(), dt=t1-t0;
+		LOGGER.trace({query:q,args:a,ms:dt,rows:r&&r.rowCount},"SQL query '%s' took %dms",q,dt);
+		cb(e,r);
+	   });
+	  },
+	  commit: function(cb) {
+	   LOGGER.trace('SQL: commit');
+	   if(this.over) return cb(new Error('game over'));
+	   return (this.over=true),C.query('COMMIT',function(e){D();cb&&cb(e)});
+	  },
+	  rollback: function(cb) {
+	   LOGGER.trace('SQL: rollback');
+	   if(this.over) return cb(new Error('game over'));
+	   return (this.over=true),C.query('ROLLBACK',function(e){D();cb&&cb(e)});
+	  },
+	  end: function(e,cb) {
+	   if(e) LOGGER.trace(e,"rolling back transaction due to an error"),this.rollback(cb);
+	   this.commit(cb);
+	  }
+	 });
+	});
+   });
+  }
+ };
+
+
+ return {
+
+  json: function clipperz_json(req,res,cb) {
+   var method = req.body.method, pp = JSON.parse(req.body.parameters).parameters;
+   var message = pp.message;
+   var ppp = pp.parameters;
+   res.res = function(o) { return res.json({result:o}) };
+   LOGGER.trace({method:method,parameters:pp},"JSON request");
+
+   switch(method) {
+    case 'registration':
+     switch(message) {
+      case 'completeRegistration': return PG.Q(
+	"INSERT INTO clipperz.theuser"
+       +" (u_name, u_srp_s,u_srp_v, u_authversion,u_header,u_statistics,u_version,u_lock)"
+       +" VALUES ($1, $2,$3, $4,$5,$6,$7,$8)",
+       [pp.credentials.C, pp.credentials.s, pp.credentials.v,
+	pp.credentials.version,pp.user.header, pp.user.statistics,
+	pp.user.version, pp.user.lock], function(e,r) {
+	if(e) return cb(e);
+	res.res({lock:pp.user.lock,result:'done'});
+       });
+     }
+    break;
+
+    case 'handshake':
+     switch(message) {
+      case 'connect': return ASYNC.auto({
+       u: function(cb) { PG.Q(
+	"SELECT u_id, u_srp_s, u_srp_v FROM clipperz.theuser WHERE u_name=$1",
+	[ppp.C], function(e,r) {
+	if(e) return cb(e);
+	if(!r.rowCount) return cb(null,{u_id:null,u_srp_s:n123,u_srp_v:n123});
+	cb(null,r.rows[0]);
+       }) },
+       otp: ['u',function(cb,r) {
+	if(!req.session.otp) return cb();
+	if(req.session.u!=r.u.u_id) return cb(new Error('user/OTP mismatch'));
+	PG.Q(
+	  "UPDATE clipperz.theotp AS otp"
+	 +" SET"
+	 +"  otps_id=CASE WHEN s.otps_code='REQUESTED' THEN ("
+	 +"   SELECT ss.otps_id FROM clipperz.otpstatus AS ss WHERE ss.otps_code='USED'"
+	 +"  ) ELSE otp.otps_id END,"
+	 +"  otp_utime=current_timestamp"
+	 +" FROM clipperz.otpstatus AS s, clipperz.theotp AS o"
+	 +" WHERE"
+	 +"  o.otp_id=otp.otp_id AND otp.otps_id=s.otps_id"
+	 +"  AND otp.otp_id=$1 AND otp.u_id=$2"
+	 +" RETURNING o.otps_id!=otp.otps_id AS yes, o.otp_ref",
+	 [ req.session.otp, req.session.u ],
+	 function(e,r) {
+	 if(e) return cb(e);
+	 if(!r.rowCount) return cb(new Error('no OTP found'));
+	 r=r.rows[0];
+	 if(!r.yes) return cb(new Error('OTP is in a sorry state'));
+	 cb(null,{ref:r.otp_ref});
+	});
+       }]
+      },function(e,r) {
+       if(e) return cb(e);
+       req.session.C = ppp.C; req.session.A = ppp.A;
+       req.session.s = r.u.u_srp_s; req.session.v = r.u.u_srp_v;
+       req.session.u = r.u.u_id;
+       req.session.b = clipperz_random();
+       req.session.B = BIGNUM(req.session.v,16).add(srp_g.powm(BIGNUM(req.session.b,16),srp_n)).toString(16);
+       var rv = {s:req.session.s,B:req.session.B}
+       if(r.otp && r.otp.otp_ref) rv.oneTimePassword=r.otp.otp_ref;
+       res.res(rv);
+      });
+ 
+      case 'credentialCheck':
+       var u = clipperz_hash(BIGNUM(req.session.B,16).toString(10));
+       var A = BIGNUM(req.session.A,16);
+       var S = A.mul(BIGNUM(req.session.v,16).powm(BIGNUM(u,16),srp_n)).powm(
+		BIGNUM(req.session.b,16), srp_n);
+       var K = clipperz_hash(S.toString(10));
+       var M1 = clipperz_hash(A.toString(10)+BIGNUM(req.session.B,16).toString(10)+K.toString(16));
+       if(M1!=ppp.M1) return res.res({error:'?'});
+       req.session.K = K;
+       var M2 = clipperz_hash(A.toString(10)+M1+K.toString(16));
+       return res.res({M2:M2,connectionId:'',loginInfo:{latest:{},current:{}},offlineCopyNeededd:false,lock:'----'});
+
+      case 'oneTimePassword': return PG.Q(
+	"UPDATE clipperz.theotp AS otp"
+       +" SET"
+       +"  otps_id = CASE WHEN s.otps_code!='ACTIVE' THEN s.otps_id ELSE ("
+       +"   SELECT ss.otps_id FROM clipperz.otpstatus AS ss WHERE ss.otps_code=CASE"
+       +"    WHEN otp.otp_key_checksum=$2 THEN 'REQUESTED'"
+       +"    ELSE 'DISABLED' END"
+       +"  ) END,"
+       +"  otp_data = CASE WHEN s.otps_code='ACTIVE' THEN '' ELSE otp.otp_data END,"
+       +"  otp_utime = current_timestamp,"
+       +"  otp_rtime = CASE WHEN otp.otp_key_checksum=$2 THEN current_timestamp ELSE otp.otp_rtime END"
+       +" FROM clipperz.otpstatus AS s, clipperz.theotp AS o"
+       +" WHERE"
+       +"  o.otp_id=otp.otp_id AND otp.otps_id=s.otps_id AND otp.otp_key=$1"
+       +" RETURNING otp.u_id, s.otps_code, otp.otp_id, otp.otp_key_checksum, o.otp_data, otp.otp_version",
+       [ ppp.oneTimePasswordKey, ppp.oneTimePasswordKeyChecksum ],
+       function(e,r) {
+       if(e) return cb(e);
+       if(!r.rowCount) return cb(new Error('OTP not found'));
+       r=r.rows[0];
+       if(r.otp_key_checksum!=ppp.oneTimePasswordKeyChecksum)
+	return cb(new Error('OTP was disabled because of checksum mismatch'));
+       if(r.otps_code!='ACTIVE')
+	return cb(new Error("OTP wasn't active, sorry"));
+       req.session.u=r.u_id; req.session.otp=r.otp_id;
+       res.res({data:r.otp_data,version:r.otp_version});
+      });
+     }
+    break;
+
+    case 'message':
+     if(!req.session.K) return res.res({result:'EXCEPTION',message:"effectively, we're missing a aconnection"});
+     if(req.session.K!=pp.srpSharedSecret) return res.res({error:'Wrong shared secret!'});
+     switch(message) {
+      case 'getUserDetails': return ASYNC.parallel({
+       u: function(cb) {
+	PG.Q("SELECT u_header,u_statistics,u_version FROM clipperz.theuser WHERE u_id=$1",
+	 [req.session.u],function(e,r) {
+	 if(e) return cb(e);
+	 if(!r.rowCount) return cb(new Error("user's gone AWOL"));
+	 cb(null,r.rows[0]);
+	});
+       },
+       stats: function(cb) {
+	PG.Q("SELECT r_ref,r_mtime FROM clipperz.therecord WHERE u_id=$1",
+	 [req.session.u],function(e,r) {
+	 if(e) return cb(e);
+	 cb(null,r.rows.reduce(function(p,r){p[r.r_ref]={updateDate:r.r_mtime};return p},{}));
+	});
+       }
+      },function(e,r) {
+       if(e) return cb(e);
+       res.res({header:JSON.stringify(r.u.u_header),statistics:r.u.u_statistics,version:r.u.u_version,recordsStats:r.stats});
+      });
+
+      case 'saveChanges': return PG.T(function(e,T) {
+       if(e) return cb(e);
+       ASYNC.auto({
+	user: function(cb) {
+	 T.Q(
+	   "UPDATE clipperz.theuser"
+	  +" SET u_header=$1, u_statistics=$2, u_version=$3, u_lock=COALESCE($4,u_lock)"
+	  +" WHERE u_id=$5"
+	  +" RETURNING u_lock",[ppp.user.header,ppp.user.statistics,ppp.user.version,ppp.user.lock||null,req.session.u],
+	  function(e,r) {
+	  if(e) return cb(e);
+	  if(!r.rowCount) return cb(new Error("user's gone AWOL"));
+	  cb(null,r.rows[0]);
+	 });
+	},
+	updaterecords: function(cb) {
+	 if(!(ppp.records && ppp.records.updated && ppp.records.updated.length)) return cb();
+	 ASYNC.each(ppp.records.updated,function(r,cb) {
+	  ASYNC.auto({
+	   updater: function(cb) {
+	    T.Q(
+	      "UPDATE clipperz.therecord"
+	     +" SET r_data=$2, r_version=$3, r_mtime=current_timestamp"
+	     +" WHERE r_ref=$1 AND u_id=$4 RETURNING r_id",
+	     [r.record.reference,r.record.data,r.record.version,req.session.u], function(e,r) {
+	     if(e) return cb(e);
+	     return cb(null,r.rows.length?r.rows[0]:null);
+	    });
+	   },
+	   insertr: ['updater',function(cb,rr) {
+	    if(rr.updater) return cb();
+	    T.Q(
+	      "INSERT INTO clipperz.therecord"
+	     +" (u_id,r_ref,r_data,r_version)"
+	     +" VALUES ($1,$2,$3,$4) RETURNING r_id",[req.session.u,r.record.reference,r.record.data,r.record.version],
+	     function(e,r) {
+	     if(e) return cb(e);
+	     return cb(null,r.rows[0]);
+	    });
+	   }],
+	   updatev: ['updater','insertr',function(cb,rr) {
+	    var crv=r.currentRecordVersion;
+	    T.Q(
+	      "UPDATE clipperz.therecordversion"
+	     +" SET rv_ref=$1, rv_data=$2, rv_version=$3,"
+	     +"  rv_previous_id=COALESCE($4,rv_previous_id),"
+	     +"  rv_previous_key=$5, r_id=$6, rv_mtime=current_timestamp"
+	     +" WHERE"
+	     +"  rv_id=(SELECT rv_id FROM clipperz.therecordversion WHERE r_id=$6 ORDER BY r_id ASC LIMIT 1)"
+	     +" RETURNING rv_id",
+	     [crv.reference,crv.data,crv.version,
+	      crv.previousVersion||null,crv.previousVersionKey,
+	      (rr.updater||rr.insertr).r_id],
+	     function(e,r) {
+	     if(e) return cb(e);
+	     return cb(null,r.rows.length?r.rows[0]:null);
+	    });
+	   }],
+	   insertv: ['updatev',function(cb,rr) {
+	    if(rr.updatev) return cb();
+	    var crv=r.currentRecordVersion;
+	    T.Q(
+	      "INSERT INTO clipperz.therecordversion"
+	     +" (r_id,rv_ref,rv_data,rv_version,rv_previous_id,rv_previous_key)"
+	     +" VALUES ($1,$2,$3,$4,$5,$6) RETURNING rv_id",
+	     [(rr.updater||rr.insertr).r_id,
+	      crv.reference, crv.data, crv.version,
+	      crv.previousVersion||null,crv.previousVersionKey],
+	     function(e,r) {
+	     if(e) return cb(e);
+	     return cb(null,r.rows[0]);
+	    });
+	   }]
+	  },cb);
+	 },cb);
+	},
+	deleterecords: function(cb) {
+	 if(!(ppp.records && ppp.records.deleted && ppp.records.deleted.length)) return cb();
+	 T.Q(
+	   "DELETE FROM clipperz.therecord"
+	  +" WHERE r_ref = ANY($1::text[]) AND u_id=$2",
+	  [ '{'+ppp.records.deleted.join(',')+'}', req.session.u ], cb);
+	}
+       },function(e,r) {
+	T.end(e, function(e) {
+	 if(e) return cb(e);
+	 res.res({result:'done',lock:r.user.u_lock});
+	});
+       });
+      });
+
+      case 'getRecordDetail': return ASYNC.auto({ // TODO: could be done in one query instead
+       record: function(cb) {
+	PG.Q(
+	 "SELECT r_id,r_ref,r_data,r_version, r_ctime, r_mtime, r_atime FROM clipperz.therecord WHERE r_ref=$1",
+	 [ppp.reference],function(e,r) {
+	  if(e) return cb(e);
+	  if(!r.rowCount) return cb(new Error('no record found'));
+	  return cb(null,r.rows[0]);
+	});
+       },
+       version: ['record',function(cb,r) {
+	PG.Q(
+	  "SELECT rv_ref, rv_data, rv_header, rv_version, rv_ctime, rv_mtime, rv_atime"
+	 +" FROM clipperz.therecordversion WHERE r_id=$1 ORDER BY rv_id ASC LIMIT 1",
+	 [r.record.r_id],function(e,r) {
+	 if(e) return cb(e);
+	 if(!r.rowCount) return cb(new Error('no record version found'));
+	 return cb(null,r.rows[0]);
+	});
+       }]
+      },function(e,r) {
+       if(e) return cb(e);
+       var v = {};
+       v[r.version.rv_ref] = {
+	reference: r.version.rv_ref,
+	data: r.version.rv_data, header: r.version.rv_header,
+	version: r.version.rv_version,
+	creationDate: r.version.rv_ctime, updateDate: r.version.rv_mtime, accessDate: r.version.rv_atime
+       };
+       res.res({ versions: v, currentVersion: r.version.rv_ref, reference: r.record.r_ref,
+	data: r.record.r_data, version: r.record.r_version,
+	creationDate: r.record.r_ctime, updateDate: r.record.r_mtime, accessDate: r.record.r_atime,
+	oldestUsedEncryptedVersion: '---' });
+      });
+
+      case 'addNewOneTimePassword': return PG.T(function(e,T) {
+       if(e) return cb(e);
+       ASYNC.parallel({
+	otp: function(cb) {
+	 var otp = ppp.oneTimePassword;
+	 T.Q(
+	   "INSERT INTO clipperz.theotp"
+	  +" (u_id,otp_ref,otp_key,otp_key_checksum,otp_data,otp_version,otps_id)"
+	  +" SELECT $1,$2,$3,$4,$5,$6,otps_id FROM clipperz.otpstatus"
+	  +" WHERE otps_code='ACTIVE'",
+	  [ req.session.u, otp.reference, otp.key, otp.keyChecksum,
+	    otp.data, otp.version], function(e,r) {
+	  if(e) return cb(e);
+	  if(!r.rowCount) return cb(new Error('no user or status'));
+	  cb();
+	 });
+	},
+	user: function(cb) {
+	 var u = ppp.user;
+	 T.Q(
+	   "UPDATE clipperz.theuser"
+	  +" SET u_header=$1, u_statistics=$2, u_version=$3, u_lock=COALESCE($4,u_lock)"
+	  +" WHERE u_id=$5",
+	  [ u.header, u.statistics, u.version, u.lock||null, req.session.u],
+	  function(e,r) {
+	  if(e) return cb(e);
+	  if(!r.rowCount) return cb(new Error("user's gone AWOL"));
+	  cb();
+	 });
+	}
+       },function(e,r) {
+	T.end(e, function(e) {
+	 if(e) return cb(e);
+	 res.res({result:'done',lock:ppp.user.lock});
+	});
+       });
+      });
+
+      case 'updateOneTimePasswords': return PG.T(function(e,T) {
+       if(e) return cb(e);
+       ASYNC.parallel({
+	otp: function(cb) {
+	 T.Q(
+	   "DELETE FROM clipperz.theotp"
+	  +" WHERE u_id=$1"
+	  +"  AND NOT otp_ref = ANY($2::text[])",
+	  [ req.session.u,'{'+ppp.oneTimePasswords.join(',')+'}' ],cb);
+	},
+	user: function(cb) {
+	 var u = ppp.user;
+	 T.Q(
+	   "UPDATE clipperz.theuser"
+	  +" SET u_header=$1, u_statistics=$2, u_version=$3, u_lock=COALESCE($4,u_lock)"
+	  +" WHERE u_id=$5",
+	  [ u.header, u.statistics, u.version, u.lock||null, req.session.u],
+	  function(e,r) {
+	  if(e) return cb(e);
+	  if(!r.rowCount) return cb(new Error("user's gone AWOL"));
+	  cb();
+	 });
+	}
+       },function(e,r) {
+	T.end(e, function(e) {
+	 if(e) return cb(e);
+	 res.res({result:ppp.user.lock});
+	});
+       });
+      });
+
+      case 'upgradeUserCredentials': return PG.T(function(e,T) {
+       if(e) return cb(e);
+       ASYNC.parallel({
+	user: function(cb) {
+	 var u = ppp.user, c = ppp.credentials;
+	 T.Q(
+	   "UPDATE clipperz.theuser"
+	  +" SET u_header=$1, u_statistics=$2, u_version=$3, u_lock=COALESCE($4,u_lock),"
+	  +"  u_name=$5, u_srp_s=$6, u_srp_v=$7, u_authversion=$8"
+	  +" WHERE u_id=$9 RETURNING u_lock",
+	  [ u.header,u.statistics,u.version,u.lock||null,
+	    c.C,c.s,c.v,c.version, req.session.u ],function(e,r) {
+	  if(e) return cb(e);
+	  if(!r.rowCount) return cb(new Error("user's gone AWOL"));
+	  cb(e,r.rows[0]);
+	 });
+	},
+	otp: function(cb) {
+	 var otps=ppp.oneTimePasswords;
+	 if(!otps) return cb();
+	 ASYNC.each(Object.keys(otps),function(r,cb) {
+	  T.Q(
+	    "UPDATE clipperz.theotp"
+	   +" SET otp_data=$1, otp_utime=current_timestamp WHERE otp_ref=$2 AND u_id=$3",
+	   [ otps[r], r, req.session.u ], function(e,r) {
+	   if(e) return cb(e);
+	   if(!r.rowCount) return cb(new Error("OTP's gone AWOL"));
+	   cb();
+	  });
+	 },cb);
+	}
+       },function(e,r) {
+	T.end(e, function(e) {
+	 if(e) return cb(e);
+	 res.res({result:'done',lock:r.user.u_lock});
+	});
+       });
+      });
+
+      case 'deleteUser': return PG.Q(
+       "DELETE FROM clipperz.theuser WHERE u_id=$1",
+       [req.session.u],function(e,r) {
+       if(e) return cb(e);
+       res.res({result:'ok'});
+      });
+
+      case 'echo': return res.res({result:ppp});
+      case 'getOneTimePasswordsDetails': return res.res({});
+      case 'getLoginHistory': return res.res({result:[]});
+     }
+    break;
+    case 'logout': return req.session.destroy(function(e){res.res({})});
+   }
+   cb();
+  },
+
+  dump: function(req,res,cb) {
+   if(!req.session.u) return cb(new Error('logging in helps'));
+   return ASYNC.parallel({
+    u: function(cb) {
+     PG.Q(
+       "SELECT"
+      +" u_name, u_srp_s, u_srp_v, u_authversion, u_header, u_statistics, u_version"
+      +" FROM clipperz.theuser WHERE u_id=$1",[req.session.u],function(e,r) {
+      if(e) return cb(e);
+      if(!r.rowCount) return cb(new Error("user's gone AWOL"));
+      r = r.rows[0];
+      return cb(null,{u:r.u_name,d:{s:r.u_srp_s,v:r.u_srp_v, version:r.u_authversion,
+       maxNumberOfRecords: '100', userDetails: JSON.stringify(r.u_header),
+       statistics: r.u_statistics, userDetailsVersion: r.u_version
+      }});
+     });
+    },
+    records: function(cb) {
+     PG.Q(
+       "SELECT"
+      +"  r.r_id, r.r_ref, r_data, r_version, r_ctime, r_mtime, r_atime,"
+      +"  rv.rv_id, rv.rv_ref AS rv_ref, rv_header, rv_data, rv_version, rv_ctime, rv_mtime, rv_atime"
+      +" FROM"
+      +"  clipperz.therecord AS r"
+      +"  LEFT JOIN clipperz.therecordversion AS rv USING (r_id)"
+      +" WHERE r.u_id=$1"
+      +" ORDER BY r.r_id ASC, rv.rv_id ASC", [req.session.u],function(e,r) {
+      if(e) return cb(e);
+      var rv = {};
+      r.rows.forEach(function(r) {
+       if(!rv[r.r_ref]) rv[r.r_ref] = {
+	data: r.r_data, version: r.r_version,
+	creationDate: r.r_ctime.toString(),
+	updateDate: r.r_mtime.toString(),
+	accessDate: r.r_atime.toString(),
+	versions: {}
+       };
+       if(!r.rv_id) return;
+       rv[r.r_ref].versions[rv[r.r_ref].currentVersion=r.rv_ref] = {
+        header: r.rv_header, data: r.rv_data, version: r.rv_version,
+	creationDate: r.rv_ctime.toString(),
+	updateDate: r.rv_mtime.toString(),
+	accessDate: r.rv_atime.toString()
+       };
+      });
+      cb(null,rv);
+     });
+    },
+    html: function(cb) {
+     FS.readFile(CONFIG.dump_template,{encoding:'utf-8'},cb);
+    }
+   },function(e,r) {
+    if(e) return cb(e);
+    var d = new Date();
+    res.attachment('Clipperz_'+d.getFullYear()+'_'+(d.getMonth()+1)+'_'+d.getDate()+'.html');
+    var ojs = { users: {
+     catchAllUser: { __masterkey_test_value__: 'masterkey', s: n123, v: n123 }
+    } };
+    r.u.d.records = r.records;
+    ojs.users[r.u.u] = r.u.d;
+    res.send(r.html.replace('/*offline_data_placeholder*/',
+      "_clipperz_dump_data_="+JSON.stringify(ojs)
+     +";"
+     +"Clipperz.PM.Proxy.defaultProxy = new Clipperz.PM.Proxy.Offline();"
+     +"Clipperz.Crypto.PRNG.defaultRandomGenerator().fastEntropyAccumulationForTestingPurpose();"));
+   });
+  }
+ };
+
+};
diff --git a/backend/node/src/clipperz.schema.sql b/backend/node/src/clipperz.schema.sql
new file mode 100644
index 0000000..ba6f482
--- a/dev/null
+++ b/backend/node/src/clipperz.schema.sql
@@ -0,0 +1,60 @@
+CREATE SCHEMA clipperz;
+
+CREATE TABLE clipperz.theuser (
+ u_id serial PRIMARY KEY,
+ u_name varchar NOT NULL UNIQUE,
+ u_srp_s varchar NOT NULL,
+ u_srp_v varchar NOT NULL,
+ u_header json NOT NULL,
+ u_statistics varchar NOT NULL,
+ u_authversion varchar NOT NULL,
+ u_version varchar NOT NULL,
+ u_lock varchar NOT NULL
+);
+
+CREATE TABLE clipperz.therecord (
+ r_id serial PRIMARY KEY,
+ u_id integer NOT NULL REFERENCES clipperz.theuser(u_id) ON UPDATE CASCADE ON DELETE CASCADE,
+ r_ref varchar NOT NULL UNIQUE,
+ r_data varchar NOT NULL,
+ r_version varchar NOT NULL,
+ r_ctime timestamp NOT NULL DEFAULT current_timestamp,
+ r_mtime timestamp NOT NULL DEFAULT current_timestamp,
+ r_atime timestamp NOT NULL DEFAULT current_timestamp
+);
+CREATE INDEX therecord_u_id_key ON clipperz.therecord (u_id);
+
+CREATE TABLE clipperz.therecordversion (
+ rv_id serial PRIMARY KEY,
+ r_id integer NOT NULL REFERENCES clipperz.therecord (r_id) ON UPDATE CASCADE ON DELETE CASCADE,
+ rv_ref varchar NOT NULL UNIQUE,
+ rv_header varchar,
+ rv_data varchar NOT NULL,
+ rv_version varchar NOT NULL,
+ rv_previous_key varchar NOT NULL,
+ rv_previous_id varchar,
+ rv_ctime timestamp NOT NULL DEFAULT current_timestamp,
+ rv_mtime timestamp NOT NULL DEFAULT current_timestamp,
+ rv_atime timestamp NOT NULL DEFAULT current_timestamp
+);
+
+CREATE TABLE clipperz.otpstatus (
+ otps_id serial PRIMARY KEY,
+ otps_code varchar NOT NULL,
+ otps_name varchar NOT NULL,
+ otps_desc varchar NOT NULL
+);
+
+CREATE TABLE clipperz.theotp (
+ otp_id serial PRIMARY KEY,
+ u_id integer REFERENCES clipperz.theuser (u_id) ON UPDATE CASCADE ON DELETE CASCADE,
+ otps_id integer REFERENCES clipperz.otpstatus (otps_id) ON UPDATE CASCADE ON DELETE CASCADE,
+ otp_ref varchar NOT NULL UNIQUE,
+ otp_key varchar NOT NULL UNIQUE,
+ otp_key_checksum varchar NOT NULL,
+ otp_data varchar NOT NULL,
+ otp_version varchar NOT NULL,
+ otp_ctime timestamp NOT NULL DEFAULT current_timestamp,
+ otp_rtime timestamp NOT NULL DEFAULT current_timestamp,
+ otp_utime timestamp NOT NULL DEFAULT current_timestamp
+);
diff --git a/backend/node/src/conf.json b/backend/node/src/conf.json
new file mode 100644
index 0000000..bc1f65e
--- a/dev/null
+++ b/backend/node/src/conf.json
@@ -0,0 +1,3 @@
+{
+ "psql": "postgresql:///clipperz"
+}
diff --git a/backend/node/src/package.json b/backend/node/src/package.json
new file mode 100644
index 0000000..104cc72
--- a/dev/null
+++ b/backend/node/src/package.json
@@ -0,0 +1,15 @@
+{
+  "name": "clipperz",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node app"
+  },
+  "dependencies": {
+    "express": "3.4.4",
+    "async": "~0.2.9",
+    "bignum": "~0.6.2",
+    "pg": "~2.8.3",
+    "bunyan": "~0.22.0"
+  }
+}
diff --git a/scripts/builder/backends/nodeBuilder.py b/scripts/builder/backends/nodeBuilder.py
new file mode 100755
index 0000000..bb63204
--- a/dev/null
+++ b/scripts/builder/backends/nodeBuilder.py
@@ -0,0 +1,13 @@
+#!/usr/bin/env python
+# -*- coding: UTF-8 -*-
+
+from scriptLanguageBuilder import ScriptLanguageBuilder
+
+class NodeBuilder(ScriptLanguageBuilder):
+	
+	def name(self):
+		return "Node builder"
+
+	
+	def relativePath(self):
+		return 'node'
diff --git a/scripts/builder/backends/scriptLanguageBuilder.py b/scripts/builder/backends/scriptLanguageBuilder.py
index 7d5b31c..f2d32ba 100644
--- a/scripts/builder/backends/scriptLanguageBuilder.py
+++ b/scripts/builder/backends/scriptLanguageBuilder.py
@@ -1,11 +1,15 @@
 #!/usr/bin/env python
 # -*- coding: UTF-8 -*-
 
+import os
 import shutil
 from backendBuilder import BackendBuilder
 
 class ScriptLanguageBuilder(BackendBuilder):
 
+	def frontEndTempFolder (self):
+		return os.path.join(self.tempFolder(),'htdocs')
+
 	def compileCode (self):
 		src = self.sourceFolder()
 		dst = self.tempFolder()