Merge pull request #560 from jbwdevries/certificate_date_fixes

Certificate date fixes

src/Mayaqua/Encrypt.c

@@ -2135,6 +2135,9 @@ bool Asn1TimeToSystem(SYSTEMTIME *s, void *asn1_time)
 // Convert the string to the system time
 bool StrToSystem(SYSTEMTIME *s, char *str)
 {
+	char century[3] = {0, 0, 0};
+	bool fourdigityear = false;
+
 	// Validate arguments
 	if (s == NULL || str == NULL)
 	{
@@ -2142,7 +2145,14 @@ bool StrToSystem(SYSTEMTIME *s, char *str)
 	}
 	if (StrLen(str) != 13)
 	{
-		return false;
+		if (StrLen(str) != 15) return false;
+
+		//Year has 4 digits - save first two and use the rest
+		//as if it had two digits
+		fourdigityear = true;
+		century[0] = str[0];
+		century[1] = str[1];
+		str += 2;
 	}
 	if (str[12] != 'Z')
 	{
@@ -2159,7 +2169,10 @@ bool StrToSystem(SYSTEMTIME *s, char *str)
 			second[3] = {str[10], str[11], 0};
 		Zero(s, sizeof(SYSTEMTIME));
 		s->wYear = ToInt(year);
-		if (s->wYear >= 60)
+		if( fourdigityear ) {
+			s->wYear += ToInt(century) * 100;
+		}
+		else if (s->wYear >= 60)
 		{
 			s->wYear += 1900;
 		}

src/Mayaqua/Kernel.c

@@ -2137,6 +2137,15 @@ UINT64 SystemToUINT64(SYSTEMTIME *st)
 	}
 
 	time = SystemToTime(st);
+
+	//For times before 1970-01-01, clamp to the minimum
+	//because we have to return an unsigned integer.
+	//This is less wrong than casting it to UINT64
+	//and returning a time far in the future.
+	//For some reason we subtract 9 hours below, so
+	//account for that here.
+	if( time < 32400000LL ) return 0;
+
 	sec64 = (UINT64)time * (UINT64)1000;
 	sec64 += st->wMilliseconds;