custom path for hostkeys

Signed-off-by: Michée Lengronne <michee.lengronne@coppint.com>

Author: micheelengronne

libraries/ssh_crypto.rb

@@ -16,6 +16,8 @@
 # author: Dominik Richter
 # author: Patrick Muench
 
+sshd_custom_path = attribute('sshd_custom_path', value: '/etc/ssh', description: 'Sometimes ssh configuration files are present in another location and ssh use them with the -f flag')
+
 class SshCrypto < Inspec.resource(1) # rubocop:disable Metrics/ClassLength
   name 'ssh_crypto'
 
@@ -256,7 +258,7 @@ def valid_algorithms # rubocop:disable Metrics/CyclomaticComplexity
 
   # returns the hostkeys value based on valid_algorithms
   def valid_hostkeys
-    hostkeys = valid_algorithms.map { |alg| "/etc/ssh/ssh_host_#{alg}_key" }
+    hostkeys = valid_algorithms.map { |alg| "#{sshd_custom_path}/ssh_host_#{alg}_key" }
     # its('HostKey') provides a string for a single-element value.
     # we have to return a string if we have a single-element
     # https://github.com/chef/inspec/issues/1434