fix: GPG bug fix when loading file (ytti#1109)

* GPG bug fix

* Update Sources.md

* Update README.md

README.md

@@ -246,15 +246,12 @@ oxidized
 
 Now tell Oxidized where it finds a list of network devices to backup configuration from. You can either use CSV or SQLite as source. To create a CSV source add the following snippet:
 
-Note: If gpg is set to anything other than false it will attempt to decrypt the file contents
 ```
 source:
   default: csv
   csv:
     file: ~/.config/oxidized/router.db
     delimiter: !ruby/regexp /:/
-    gpg: false
-    gpg_password: 'password'
     map:
       name: 0
       model: 1

docs/Sources.md

@@ -26,6 +26,31 @@ Example csv `/var/lib/oxidized/router.db`:
 rtr01.local:192.168.1.1:ios:oxidized:5uP3R53cR3T:T0p53cR3t
 ```
 
+If you would like to use a GPG encrypted file as the source then you can use the following example:
+
+```yaml
+source:
+  default: csv
+  csv:
+    file: ~/.config/oxidized/router.db
+    delimiter: !ruby/regexp /:/
+    gpg: true
+    gpg_password: 'password'
+    map:
+      name: 0
+      model: 1
+```
+
+> Please note, if you are running GPG v2 then you will be prompted for your gpg password on start up, if you use GPG >= 2.1 then you can add the following config to stop that behaviour:
+
+> Within `~/.gnupg/gpg-agent.conf`
+
+> `allow-loopback-pinentry`
+
+> and within: `~/.gnupg/gpg.conf`
+
+> `pinentry-mode loopback`
+
 ### Source: SQL
  Oxidized uses the `sequel` ruby gem. You can use a variety of databases that aren't explicitly listed. For more information visit https://github.com/jeremyevans/sequel Make sure you have the correct adapter!
 ### Source: MYSQL

lib/oxidized/source/csv.rb

@@ -21,9 +21,9 @@ def setup
   def load
     nodes = []
     file = File.expand_path(@cfg.file)
-    file = if @cfg.gpg?
+    if @cfg.gpg?
       crypto = GPGME::Crypto.new password: @cfg.gpg_password
-      crypto.decrypt(file).to_s
+      file = crypto.decrypt(File.open(file)).to_s
     else
       open(file)
     end