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require 'net/ssh/errors'
require 'net/ssh/authentication/methods/abstract'
module Net
module SSH
module Authentication
module Methods
# Implements the "password" SSH authentication method.
class Password < Abstract
# Attempt to authenticate the given user for the given service. If
# the password parameter is nil, this will never do anything except
# return false.
def authenticate(next_service, username, password=nil)
return false unless password
send_message(userauth_request(username, next_service, "password", false, password))
message = session.next_message
case message.type
when USERAUTH_SUCCESS
debug { "password succeeded" }
return true
when USERAUTH_FAILURE
debug { "password failed" }
raise Net::SSH::Authentication::DisallowedMethod unless
message[:authentications].split(/,/).include? 'password'
return false
when USERAUTH_PASSWD_CHANGEREQ
debug { "password change request received, failing" }
return false
else
raise Net::SSH::Exception, "unexpected reply to USERAUTH_REQUEST: #{message.type} (#{message.inspect})"
end
end
end
end
end
end
end
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