new/clear-command (#8)

Reviewed-on: #8
Co-authored-by: jake <jake.young.dev@gmail.com>
Co-committed-by: jake <jake.young.dev@gmail.com>

.gitea/workflows/security.yaml

@@ -0,0 +1,11 @@
+name: "code scans"
+on: pull_request
+
+jobs:
+  scans:
+    runs-on: test
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: "dependency scan and static code analysis"
+        uses: https://code.jakeyoungdev.com/actions/donotpassgo@v1.0.0

README.md

@@ -1,12 +1,18 @@
 # mctl
 mctl is a terminal-friendly remote console client
 
+## Index
+1. [Installation](#installation)
+2. [Setup](#setup)
+3. [Documentation](#documentation)
+4. [Security](#security)
+5. [Development](#development)
+
 ## Installation
 Install mctl using golang
 ```bash
 go install code.jakeyoungdev.com/jake/mctl@main #it is recommended to use a tagged version
 ```
-<br />
 
 ## Setup
 ### Configuring mctl
@@ -75,6 +81,13 @@ Commands can be deleted with:
 mctl delete <name>
 ```
 
+### Clear configuration file
+To clear all fields from the configuration file use:
+```bash
+#CAUTION: If the config file is cleared all data previously saved will be lost forever
+mctl clear
+```
+
 ## Documentation
 ### Commands
 |Command|Description|
@@ -85,6 +98,7 @@ mctl delete <name>
 |view \<name>|displays saved command|
 |delete \<name>|deletes saved command|
 |run \<name> args...|runs saved command filling placeholders with supplied args|
+|clear|clears config file|
 
 ### Flags
 #### config
@@ -97,7 +111,9 @@ mctl delete <name>
 All configuration data will be kept in the home directory and any sensitive data is encrypted for added security
 
 ## Security
-RCon is an inherently insecure protocol, passwords are sent in plaintext and, if possible, the port should not be exposed to the internet. It is best to keep these connections local or over a VPN
+RCon is an inherently insecure protocol, passwords are sent in plaintext and, if possible, the port should not be exposed to the internet. It is best to keep these connections local or over a VPN.
+
+mctl utilizes [govulncheck](https://pkg.go.dev/golang.org/x/vuln/cmd/govulncheck) and [gosec](https://github.com/securego/gosec) in workflows to ensure quality, secure code is being pushed. These workflow steps must pass before a PR will be accepted
 
 ## Development
-this repo is currently in heavy development and may encounter breaking changes, use a tag to prevent any surprises
+this repo is currently in development and may encounter breaking changes, use a tag to prevent any surprises

cmd/clear.go

@@ -0,0 +1,43 @@
+/*
+Copyright © 2025 Jake jake.young.dev@gmail.com
+*/
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"code.jakeyoungdev.com/jake/mctl/models"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+// clearCmd represents the clear command
+var clearCmd = &cobra.Command{
+	Use:   "clear",
+	Short: "Clear config file",
+	Long:  `Clears all configuration values for mctl, all server configuration will be lost`,
+	Run: func(cmd *cobra.Command, args []string) {
+		home, err := os.UserHomeDir()
+		cobra.CheckErr(err)
+
+		viper.AddConfigPath(home)
+		viper.SetConfigType("yaml")
+		viper.SetConfigName(".mctl")
+
+		err = viper.ReadInConfig()
+		if err == nil {
+			//clear values if file exists
+			for _, v := range models.ConfigFields {
+				viper.Set(v, "")
+			}
+			err := viper.WriteConfig()
+			cobra.CheckErr(err)
+			fmt.Println("Config file cleared, use 'config' command to re-populate it")
+		}
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(clearCmd)
+}

cmd/config.go

@@ -48,7 +48,8 @@ var configCmd = &cobra.Command{
 		viper.Set("server", cfgserver)
 		viper.Set("password", string(ciphert))
 		viper.Set("port", cfgport)
-		viper.WriteConfig()
+		err = viper.WriteConfig()
+		cobra.CheckErr(err)
 		fmt.Println()
 		fmt.Println("Config file updated!")
 	},
@@ -57,9 +58,11 @@ var configCmd = &cobra.Command{
 func init() {
 	initConfig()
 	configCmd.Flags().StringVarP(&cfgserver, "server", "s", "", "server address")
-	configCmd.MarkFlagRequired("server")
+	err := configCmd.MarkFlagRequired("server")
+	cobra.CheckErr(err)
 	configCmd.Flags().IntVarP(&cfgport, "port", "p", 0, "server rcon port")
-	configCmd.MarkFlagRequired("port")
+	err = configCmd.MarkFlagRequired("port")
+	cobra.CheckErr(err)
 	rootCmd.AddCommand(configCmd)
 }
 
@@ -72,9 +75,9 @@ func initConfig() {
 	viper.SetConfigType("yaml")
 	viper.SetConfigName(".mctl")
 	viper.AutomaticEnv()
-	viper.ReadInConfig()
+	err = viper.ReadInConfig()
 
-	if err := viper.ReadInConfig(); err != nil {
+	if err != nil {
 		//file does not exist, create it
 		viper.Set("server", cfgserver)
 		viper.Set("password", "")
@@ -92,6 +95,7 @@ func initConfig() {
 		//write config
 		viper.Set("customcmd", cmdMap)
 		viper.Set("device", string(uu))
-		viper.SafeWriteConfig()
+		err = viper.SafeWriteConfig()
+		cobra.CheckErr(err)
 	}
 }

cmd/delete.go

@@ -21,7 +21,8 @@ var deleteCmd = &cobra.Command{
 			cmdMap := viper.Get("customcmd").(map[string]any)
 			delete(cmdMap, args[0])
 			viper.Set("customcmd", cmdMap)
-			viper.WriteConfig()
+			err := viper.WriteConfig()
+			cobra.CheckErr(err)
 		}
 	},
 	PreRunE: func(cmd *cobra.Command, args []string) error {

cmd/save.go

@@ -36,7 +36,8 @@ var saveCmd = &cobra.Command{
 				}
 				cmdMap[args[0]] = txt
 				viper.Set("customcmd", cmdMap)
-				viper.WriteConfig()
+				err := viper.WriteConfig()
+				cobra.CheckErr(err)
 				fmt.Println("\nSaved!")
 			}
 		}

cryptography/aes.go

@@ -21,7 +21,10 @@ func EncryptPassword(b []byte) ([]byte, error) {
 		return nil, err
 	}
 
-	ct := aesg.Seal(nil, []byte(nonce), []byte(b), nil)
+	//adding #nosec trigger here since gosec interprets this as a hardcoded nonce value. The nonce is calculated using crypto/rand when the
+	//config command is ran and is pulled from memory when used any times after, for now we must prevent the scan from catching here until gosec
+	//is updated to account for this properly
+	ct := aesg.Seal(nil, []byte(nonce), []byte(b), nil) // #nosec
 	return ct, nil
 }
 

go.mod

@@ -1,6 +1,6 @@
 module code.jakeyoungdev.com/jake/mctl
 
-go 1.24.0
+go 1.24.2
 
 require (
 	github.com/jake-young-dev/mcr v1.3.1

models/data.go

@@ -0,0 +1,4 @@
+package models
+
+//list of all fields kept in config file
+var ConfigFields = [6]string{"customcmd", "device", "nonce", "port", "server", "password"}