From 2c697c574a6844c6cec3dc0cb6498cc0f87ff072 Mon Sep 17 00:00:00 2001
From: elijah <elijah@riseup.net>
Date: Wed, 5 Nov 2014 15:44:24 -0800
Subject: prompt user to update ssh host keys when a better one is available.
 closes #6320

---
 lib/leap_cli/commands/node.rb | 155 ++----------------------------------------
 1 file changed, 5 insertions(+), 150 deletions(-)

(limited to 'lib/leap_cli/commands/node.rb')

diff --git a/lib/leap_cli/commands/node.rb b/lib/leap_cli/commands/node.rb
index 190d348..6709077 100644
--- a/lib/leap_cli/commands/node.rb
+++ b/lib/leap_cli/commands/node.rb
@@ -1,3 +1,8 @@
+#
+# fyi: the `node init` command lives in node_init.rb,
+#      but all other `node x` commands live here.
+#
+
 autoload :IPAddr, 'ipaddr'
 
 module LeapCli; module Commands
@@ -42,45 +47,6 @@ module LeapCli; module Commands
       end
     end
 
-    node.desc 'Bootstraps a node or nodes, setting up SSH keys and installing prerequisite packages'
-    node.long_desc "This command prepares a server to be used with the LEAP Platform by saving the server's SSH host key, " +
-                   "copying the authorized_keys file, installing packages that are required for deploying, and registering important facts. " +
-                   "Node init must be run before deploying to a server, and the server must be running and available via the network. " +
-                   "This command only needs to be run once, but there is no harm in running it multiple times."
-    node.arg_name 'FILTER' #, :optional => false, :multiple => false
-    node.command :init do |init|
-      init.switch 'echo', :desc => 'If set, passwords are visible as you type them (default is hidden)', :negatable => false
-      init.flag :port, :desc => 'Override the default SSH port.', :arg_name => 'PORT'
-      init.flag :ip,   :desc => 'Override the default SSH IP address.', :arg_name => 'IPADDRESS'
-
-      init.action do |global,options,args|
-        assert! args.any?, 'You must specify a FILTER'
-        finished = []
-        manager.filter!(args).each_node do |node|
-          is_node_alive(node, options)
-          save_public_host_key(node, global, options) unless node.vagrant?
-          update_compiled_ssh_configs
-          ssh_connect_options = connect_options(options).merge({:bootstrap => true, :echo => options[:echo]})
-          ssh_connect(node, ssh_connect_options) do |ssh|
-            if node.vagrant?
-              ssh.install_insecure_vagrant_key
-            end
-            ssh.install_authorized_keys
-            ssh.install_prerequisites
-            ssh.leap.capture(facter_cmd) do |response|
-              if response[:exitcode] == 0
-                update_node_facts(node.name, response[:data])
-              else
-                log :failed, "to run facter on #{node.name}"
-              end
-            end
-          end
-          finished << node.name
-        end
-        log :completed, "initialization of nodes #{finished.join(', ')}"
-      end
-    end
-
     node.desc 'Renames a node file, and all its related files.'
     node.arg_name 'OLD_NAME NEW_NAME'
     node.command :mv do |mv|
@@ -115,30 +81,6 @@ module LeapCli; module Commands
   ## PUBLIC HELPERS
   ##
 
-  #
-  # generates the known_hosts file.
-  #
-  # we do a 'late' binding on the hostnames and ip part of the ssh pub key record in order to allow
-  # for the possibility that the hostnames or ip has changed in the node configuration.
-  #
-  def update_known_hosts
-    buffer = StringIO.new
-    buffer << "#\n"
-    buffer << "# This file is automatically generated by the command `leap`. You should NOT modify this file.\n"
-    buffer << "# Instead, rerun `leap node init` on whatever node is causing SSH problems.\n"
-    buffer << "#\n"
-    manager.nodes.keys.sort.each do |node_name|
-      node = manager.nodes[node_name]
-      hostnames = [node.name, node.domain.internal, node.domain.full, node.ip_address].join(',')
-      pub_key = read_file([:node_ssh_pub_key,node.name])
-      if pub_key
-        buffer << [hostnames, pub_key].join(' ')
-        buffer << "\n"
-      end
-    end
-    write_file!(:known_hosts, buffer.string)
-  end
-
   def get_node_from_args(args, options={})
     node_name = args.first
     node = manager.node(node_name)
@@ -149,93 +91,6 @@ module LeapCli; module Commands
     node
   end
 
-  private
-
-  ##
-  ## PRIVATE HELPERS
-  ##
-
-  #
-  # saves the public ssh host key for node into the provider directory.
-  #
-  # see `man sshd` for the format of known_hosts
-  #
-  def save_public_host_key(node, global, options)
-    log :fetching, "public SSH host key for #{node.name}"
-    address = options[:ip] || node.ip_address
-    port = options[:port] || node.ssh.port
-    public_key = get_public_key_for_ip(address, port)
-    pub_key_path = Path.named_path([:node_ssh_pub_key, node.name])
-    if Path.exists?(pub_key_path)
-      if public_key == SshKey.load(pub_key_path)
-        log :trusted, "- Public SSH host key for #{node.name} matches previously saved key", :indent => 1
-      else
-        bail! do
-          log :error, "The public SSH host key we just fetched for #{node.name} doesn't match what we have saved previously.", :indent => 1
-          log "Remove the file #{pub_key_path} if you really want to change it.", :indent => 2
-        end
-      end
-    elsif public_key.in_known_hosts?(node.name, node.ip_address, node.domain.name)
-      log :trusted, "- Public SSH host key for #{node.name} is trusted (key found in your ~/.ssh/known_hosts)"
-    else
-      puts
-      say("This is the SSH host key you got back from node \"#{node.name}\"")
-      say("Type        -- #{public_key.bits} bit #{public_key.type.upcase}")
-      say("Fingerprint -- " + public_key.fingerprint)
-      say("Public Key  -- " + public_key.key)
-      if !global[:yes] && !agree("Is this correct? ")
-        bail!
-      else
-        puts
-        write_file! [:node_ssh_pub_key, node.name], public_key.to_s
-      end
-    end
-  end
-
-  #
-  # get the public host key for a host.
-  # return SshKey object representation of the key.
-  #
-  # Only supports ecdsa or rsa host keys. rsa is preferred if both are available.
-  #
-  def get_public_key_for_ip(address, port=22)
-    assert_bin!('ssh-keyscan')
-    output = assert_run! "ssh-keyscan -p #{port} #{address}", "Could not get the public host key from #{address}:#{port}. Maybe sshd is not running?"
-    if output.empty?
-      bail! :failed, "ssh-keyscan returned empty output."
-    end
-
-    # key arrays [ip, key_type, public_key]
-    rsa_key = nil
-    ecdsa_key = nil
-
-    lines = output.split("\n").grep(/^[^#]/)
-    lines.each do |line|
-      if line =~ /No route to host/
-        bail! :failed, 'ssh-keyscan: no route to %s' % address
-      elsif line =~ / ssh-rsa /
-        rsa_key = line.split(' ')
-      elsif line =~ / ecdsa-sha2-nistp256 /
-        ecdsa_key = line.split(' ')
-      end
-    end
-
-    if rsa_key.nil? && ecdsa_key.nil?
-      bail! "ssh-keyscan got zero host keys back! Output was: #{output}"
-    else
-      key = rsa_key || ecdsa_key
-      return SshKey.load(key[2], key[1])
-    end
-  end
-
-  def is_node_alive(node, options)
-    address = options[:ip] || node.ip_address
-    port = options[:port] || node.ssh.port
-    log :connecting, "to node #{node.name}"
-    assert_run! "nc -zw3 #{address} #{port}",
-      "Failed to reach #{node.name} (address #{address}, port #{port}). You can override the configured IP address and port with --ip or --port."
-  end
-
   def seed_node_data(node, args)
     args.each do |seed|
       key, value = seed.split(':')
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