fix for wrong date values

CHANGES_NEXT_RELEASE

@@ -0,0 +1 @@
+- Fix: wrong date values should not allowed in subscription's expires field (#4541)

src/lib/common/globals.cpp

@@ -534,6 +534,53 @@ static int timezoneOffset(const char* tz)
 
 
 
+/*****************************************************************************
+*
+* isLeapYear -
+*
+* This code will check, if the given year is a leap year or not.
+*
+*/
+bool isLeapYear(int year)
+{
+  // ref: https://www.geeksforgeeks.org/program-check-given-year-leap-year/
+  if (year % 400 == 0)
+  {
+    return true;
+  }
+  if ((year % 4 == 0) && (year % 100 != 0))
+  {
+    return true;
+  }
+  return false;
+}
+
+
+
+/*****************************************************************************
+*
+* daysInMonth -
+*
+* This code will check correct number of days in given month.
+*
+*/
+int daysInMonth(int year, int month)
+{
+  if (month == 1) //february
+  {
+    return isLeapYear(year) ? 29 : 28;
+  }
+  // for April, June, September, November
+  if (month == 3 || month == 5 || month == 8 || month == 10)
+  {
+    return 30;
+  }
+  // For all other months (Jan, March, May, July, Aug, October, December)
+  return 31;
+}
+
+
+
 /*****************************************************************************
 *
 * parse8601Time -
@@ -606,6 +653,25 @@ double parse8601Time(const std::string& ss)
   time.tm_min  = m;        // 0-59
   time.tm_sec  = (int) s;  // 0-61 (0-60 in C++11)
 
+  const int minYear = 0;
+  const int minMonth = 0;
+  const int maxMonth = 11;
+  const int minDay = 1;
+  const int maxDay = daysInMonth(y, time.tm_mon);;
+  const int minHour = 0;
+  const int maxHour = 23;
+  const int minMinute = 0;
+  const int maxMinute = 59;
+  const int minSecond = 0;
+  const int maxSecond = 59;
+
+  if (time.tm_year < minYear || time.tm_mon < minMonth || time.tm_mon > maxMonth || time.tm_mday < minDay ||
+      time.tm_mday > maxDay || time.tm_hour < minHour || time.tm_hour > maxHour || time.tm_min < minMinute ||
+      time.tm_min > maxMinute || time.tm_sec < minSecond || time.tm_sec > maxSecond)
+  {
+    return -1;
+  }
+
   int64_t  totalSecs  = timegm(&time) - offset;
   float    millis     = s - (int) s;
   double   timestamp  = totalSecs;

test/functionalTest/cases/1087_error_handling/error_messages_for_invalid_tenant_in_v2.test

@@ -41,7 +41,7 @@ payload='{
   "timestamp_0":
   {
     "type": "DateTime",
-    "value": "017-06-17T07:21:24.238Z",
+    "value": "2017-06-17T07:21:24.238Z",
     "metadata": {
       "very_hot_1":
       {