Read encryption key from json file

README.md

@@ -66,5 +66,18 @@ Optional Arguments:
 1) -k (encryption key): 
           gocrypt -w filename -k encryption_key
           gocrypt -r filename -k encryption_key
-   if -k is not provided then the default key is used
+   if key is not provided then the default key is used
+
+2) -f (file name of file containing encryption key)
+          gocrypt -w filename -f /home/username/encryptionkey.json
+          gocrypt -r filename -f /home/username/encryptionkey.json
+```
+
+Writing keys in file, while using `-f` option: <br />
+The file should be a valid json file with a key value pair where both key and value are strings.
+
+```shell script
+{
+    "key": "MyENCRYptionkey123"
+}
 ```

logger/logger.go

@@ -21,6 +21,9 @@ Optional Arguments:
           gocrypt -w filename -k encryption_key
           gocrypt -r filename -k encryption_key
    if key is not provided then the default key is used
+2) -f (file name of file containing encryption key)
+          gocrypt -w filename -f <path to json file>
+          gocrypt -r filename -f <path to json file>
 `
 )
 

utils/utils.go

@@ -1,6 +1,7 @@
 package utils
 
 import (
+	"encoding/json"
 	"errors"
 	"io/ioutil"
 	"os/exec"
@@ -58,6 +59,26 @@ func ArgParse(args []string) ([]string, error) {
 					key := args[4]
 					return []string{option, filename, key}, nil
 				}
+			} else if keyOpt == "-f" {
+				if len(args) == 4 {
+					return []string{option, filename, ""}, errors.New("no file name supplied ")
+				} else {
+					confFile := args[4]
+					keyConfig, err := ReadFromFile(confFile)
+
+					if err != nil {
+						return []string{"", "", ""}, errors.New(err.Error())
+					}
+
+					keyModal := make(map[string]string, 0)
+					err = json.Unmarshal(keyConfig, &keyModal)
+
+					if err != nil {
+						return []string{"", "", ""}, errors.New(err.Error())
+					}
+
+					return []string{option, filename, keyModal["key"]}, nil
+				}
 			} else { // throws error if supplied options are not recognised
 				return []string{"", "", ""}, errors.New("invalid option, use -h to see available options ")
 			}

version

@@ -1 +1 @@
-v1.0.0
+v1.1.0