postgresql-based clipperz own session store

the use thereof is not mandatory, but may come in handy for the
standalone deployment

1 files changed, 36 insertions, 1 deletions

diff --git a/backend/node/src/clipperz.js b/backend/node/src/clipperz.js
index eebd5bf..73af0a0 100644
--- a/backend/node/src/clipperz.js
+++ b/backend/node/src/clipperz.js
@@ -1,38 +1,69 @@
 var FS = require('fs');
 var CRYPTO = require('crypto');
 var BIGNUM = require('bignum');
 var ASYNC = require('async');
 
+var express_store = require('express').session.Store;
+
 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);
 };
+function clipperz_store(PG) {
+ var rv = function(o) { express_store.call(this,o); }
+ rv.prototype.get = function(sid,cb) { PG.Q(
+  "SELECT s_data FROM clipperz.thesession WHERE s_id=$1",[sid],
+  function(e,r) { cb(e,(e||!r.rowCount)?null:r.rows[0].s_data); }
+ ) };
+ rv.prototype.set = function(sid,data,cb) { PG.Q(
+   "UPDATE clipperz.thesession SET s_data=$1, s_mtime=current_timestamp"
+  +" WHERE s_id=$2",[data,sid], function(e,r) {
+   if(e) return cb(e);
+   if(r.rowCount) return cb();
+   PG.Q("INSERT INTO clipperz.thesession (s_id,s_data) VALUES ($1,$2)",[sid,data],cb);
+  }
+ ) };
+ rv.prototype.destroy = function(sid,cb) { PG.Q(
+  "DELETE FROM clipperz.thesession WHERE s_id=$1",[sid],cb
+ ) };
+ rv.prototype.length = function(cb) { PG.Q(
+  "SELECT count(*) AS c FROM clipperz.thesession", function(e,r) {
+     cb(e,e?null:r.rows[0].c);
+  }
+ ) };
+ rv.prototype.length = function(cb) { PQ.Q(
+  "DELETE FROM clipperz.thesession", cb
+ ) };
+ rv.prototype.__proto__ = express_store.prototype;
+ return rv;
+}
+
 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);
 	});
@@ -55,49 +86,49 @@ var CLIPPERZ = module.exports = function(CONFIG) {
 		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) return LOGGER.trace(e,"rolling back transaction due to an error"),this.rollback(cb);
 	   this.commit(cb);
 	  }
 	 });
 	});
    });
   }
  };
 
 
- return {
+ var rv = {
 
   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;
 
@@ -511,27 +542,31 @@ var CLIPPERZ = module.exports = function(CONFIG) {
        };
       });
       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();"));
    });
   }
+
  };
+ rv.__defineGetter__('session_store',function(){ return function(o) { return new (clipperz_store(PG))(o) } });
+
+ return rv;
 
 };