diff --git a/main.go b/main.go
index 082034d..f0f837a 100644
--- a/main.go
+++ b/main.go
@@ -4,12 +4,24 @@ import (
 	"encoding/csv"
 	"fmt"
 	"os"
+	"time"
+)
+
+const FILENAME = "index.txt"
+const TIMEFORMAT = "060102150405Z"
+const (
+	CERT_STATUS = iota
+	CERT_EXPIRED
+	CERT_REVOKED
+	CERT_SERIAL
+	CERT_FILENAME
+	CERT_CN
 )
 
 type Certificate struct {
 	Status   string
-	Expired  string
-	Revoked  string
+	Expired  time.Time
+	Revoked  time.Time
 	Serial   string
 	Filename string
 	CN       string
@@ -19,19 +31,37 @@ type Certificates struct {
 	Certificates []Certificate
 }
 
-func (c *Certificates) process_line(line []string) {
-	cert := Certificate{
-		line[0],
-		line[1],
-		line[2],
-		line[3],
-		line[4],
-		line[5],
+func (c Certificates) parse_time(timestring string) (*time.Time, error) {
+	date, err := time.Parse(TIMEFORMAT, timestring) // TODO: Short and Long Timeformat
+	if err != nil {
+		return nil, err
 	}
-	c.Certificates = append(c.Certificates, cert)
+	return &date, nil
 }
 
-const FILENAME = "index.txt"
+func (c *Certificates) process_line(line []string) {
+	cert := Certificate{}
+	expired, err := c.parse_time(line[CERT_EXPIRED])
+	if err != nil {
+		panic(err)
+	}
+	cert.Expired = *expired
+	revoked_string := line[CERT_REVOKED]
+	if revoked_string != "" {
+		revoked, err := c.parse_time(line[CERT_REVOKED])
+		if err != nil {
+			panic(err)
+		}
+		cert.Revoked = *revoked
+	}
+	cert.Status = line[CERT_STATUS]
+	cert.Filename = line[CERT_FILENAME]
+	cert.Serial = line[CERT_SERIAL]
+	switch cert.Status {
+	case "V":
+		c.Certificates = append(c.Certificates, cert)
+	}
+}
 
 func main() {
 	file, err := os.Open(FILENAME)