diff --git a/README.md b/README.md
new file mode 100644
index 0000000..adc2f4d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# Documentation
+
+* [OpenSSL Index Format](https://pki-tutorial.readthedocs.io/en/latest/cadb.html)
diff --git a/go.mod b/go.mod
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index 0000000..196ea3b
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/encbladexp/expired_certificate_check
+
+go 1.23.1
diff --git a/main.go b/main.go
new file mode 100644
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--- /dev/null
+++ b/main.go
@@ -0,0 +1,53 @@
+package main
+
+import (
+	"encoding/csv"
+	"fmt"
+	"os"
+)
+
+type Certificate struct {
+	Status   string
+	Expired  string
+	Revoked  string
+	Serial   string
+	Filename string
+	CN       string
+}
+
+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],
+	}
+	c.Certificates = append(c.Certificates, cert)
+}
+
+const FILENAME = "index.txt"
+
+func main() {
+	file, err := os.Open(FILENAME)
+	if err != nil {
+		panic(err)
+	}
+	defer file.Close()
+	csvreader := csv.NewReader(file)
+	csvreader.Comma = '\t'
+	lines, err := csvreader.ReadAll()
+	if err != nil {
+		panic(err)
+	}
+	cert_store := Certificates{}
+	for _, line := range lines {
+		cert_store.process_line(line)
+	}
+	fmt.Println(cert_store.Certificates)
+}