add CLI command to create a new card, fixes #1

createboltcard/main.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+	log "github.com/sirupsen/logrus"
+	qrcode "github.com/skip2/go-qrcode"
+	"os"
+)
+
+func random_hex() string {
+	b := make([]byte, 16)
+	_, err := rand.Read(b)
+	if err != nil {
+		log.Warn(err.Error())
+		return ""
+	}
+
+	return hex.EncodeToString(b)
+}
+
+func main() {
+	one_time_code := random_hex()
+	lock_key := random_hex()
+	aes_cmac := random_hex()
+
+	// create the new card record
+
+	err := db_insert_card(one_time_code, lock_key, aes_cmac)
+	if err != nil {
+		log.Warn(err.Error())
+		return
+	}
+
+	// remove any expired records
+
+	err = db_delete_expired()
+	if err != nil {
+		log.Warn(err.Error())
+		return
+	}
+
+	// show a QR code on the console for the URI + one_time_code
+
+	hostdomain := os.Getenv("HOST_DOMAIN")
+	url := "https://" + hostdomain + "/new?a=" + one_time_code
+	fmt.Println(url)
+	q, err := qrcode.New(url, qrcode.Medium)
+	fmt.Println(q.ToSmallString(false))
+}