67 lines
2.1 KiB
Ruby
67 lines
2.1 KiB
Ruby
|
require 'net/ssh/prompt'
|
||
|
|
require 'net/ssh/authentication/methods/abstract'
|
||
|
|
|
||
|
|
module Net
|
||
|
|
module SSH
|
||
|
|
module Authentication
|
||
|
|
module Methods
|
||
|
|
|
||
|
|
# Implements the "keyboard-interactive" SSH authentication method.
|
||
|
|
class KeyboardInteractive < Abstract
|
||
|
|
include Prompt
|
||
|
|
|
||
|
|
USERAUTH_INFO_REQUEST = 60
|
||
|
|
USERAUTH_INFO_RESPONSE = 61
|
||
|
|
|
||
|
|
# Attempt to authenticate the given user for the given service.
|
||
|
|
def authenticate(next_service, username, password=nil)
|
||
|
|
debug { "trying keyboard-interactive" }
|
||
|
|
send_message(userauth_request(username, next_service, "keyboard-interactive", "", ""))
|
||
|
|
|
||
|
|
loop do
|
||
|
|
message = session.next_message
|
||
|
|
|
||
|
|
case message.type
|
||
|
|
when USERAUTH_SUCCESS
|
||
|
|
debug { "keyboard-interactive succeeded" }
|
||
|
|
return true
|
||
|
|
when USERAUTH_FAILURE
|
||
|
|
debug { "keyboard-interactive failed" }
|
||
|
|
return false
|
||
|
|
when USERAUTH_INFO_REQUEST
|
||
|
|
name = message.read_string
|
||
|
|
instruction = message.read_string
|
||
|
|
debug { "keyboard-interactive info request" }
|
||
|
|
|
||
|
|
unless password
|
||
|
|
puts(name) unless name.empty?
|
||
|
|
puts(instruction) unless instruction.empty?
|
||
|
|
end
|
||
|
|
|
||
|
|
lang_tag = message.read_string
|
||
|
|
responses =[]
|
||
|
|
|
||
|
|
message.read_long.times do
|
||
|
|
text = message.read_string
|
||
|
|
echo = message.read_bool
|
||
|
|
responses << (password || prompt(text, echo))
|
||
|
|
end
|
||
|
|
|
||
|
|
# if the password failed the first time around, don't try
|
||
|
|
# and use it on subsequent requests.
|
||
|
|
password = nil
|
||
|
|
|
||
|
|
msg = Buffer.from(:byte, USERAUTH_INFO_RESPONSE, :long, responses.length, :string, responses)
|
||
|
|
send_message(msg)
|
||
|
|
else
|
||
|
|
raise Net::SSH::Exception, "unexpected reply in keyboard interactive: #{message.type} (#{message.inspect})"
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|