No puedo conectar usando claves con Ruby y net/ssh

Question

Tengo problemas para conectarme a través de ssh desde ruby ​​usando la gema 'net-ssh', obteniendo Net :: SSH :: AuthenticationFailed. El código está por debajo

require 'net/ssh' 
keys = ["path_to_private_key"] 
Net::SSH.start('host', 'user',:keys => keys, :verbose => :debug) do |ssh| 
    #ssh code 

end 

usando SSH directamente desde la línea de comandos funciona:

ssh -i <path_to_private_key> user@host 

¿Tengo la API ssh mal? He intentado tanto 'usuario @ host' como 'usuario' como el nombre de usuario con el mismo resultado.

Aquí está la salida de depuración:

D, [2011-07-26T19:42:00.135148 #3511] DEBUG -- net.ssh.transport.session[140b040]: establishing connection to host:22 
D, [2011-07-26T19:42:00.164190 #3511] DEBUG -- net.ssh.transport.session[140b040]: connection established 
I, [2011-07-26T19:42:00.164344 #3511] INFO -- net.ssh.transport.server_version[140a3fc]: negotiating protocol version 
D, [2011-07-26T19:42:00.192092 #3511] DEBUG -- net.ssh.transport.server_version[140a3fc]: remote is `SSH-2.0-OpenSSH_5.3p1 Debian-3ubuntu3' 
D, [2011-07-26T19:42:00.192177 #3511] DEBUG -- net.ssh.transport.server_version[140a3fc]: local is `SSH-2.0-Ruby/Net::SSH_2.1.4 x86_64-linux' 
D, [2011-07-26T19:42:00.212348 #3511] DEBUG -- tcpsocket[140aaf0]: read 784 bytes 
D, [2011-07-26T19:42:00.212461 #3511] DEBUG -- tcpsocket[140aaf0]: received packet nr 0 type 20 len 780 
I, [2011-07-26T19:42:00.212515 #3511] INFO -- net.ssh.transport.algorithms[13e9058]: got KEXINIT from server 
I, [2011-07-26T19:42:00.212604 #3511] INFO -- net.ssh.transport.algorithms[13e9058]: sending KEXINIT 
D, [2011-07-26T19:42:00.212698 #3511] DEBUG -- tcpsocket[140aaf0]: queueing packet nr 0 type 20 len 556 
D, [2011-07-26T19:42:00.212741 #3511] DEBUG -- tcpsocket[140aaf0]: sent 560 bytes 
I, [2011-07-26T19:42:00.212771 #3511] INFO -- net.ssh.transport.algorithms[13e9058]: negotiating algorithms 
D, [2011-07-26T19:42:00.212859 #3511] DEBUG -- net.ssh.transport.algorithms[13e9058]: negotiated: 
* kex: diffie-hellman-group-exchange-sha1 
* host_key: ssh-rsa 
* encryption_server: aes128-cbc 
* encryption_client: aes128-cbc 
* hmac_client: hmac-sha1 
* hmac_server: hmac-sha1 
* compression_client: none 
* compression_server: none 
* language_client: 
* language_server: 
D, [2011-07-26T19:42:00.212889 #3511] DEBUG -- net.ssh.transport.algorithms[13e9058]: exchanging keys 
D, [2011-07-26T19:42:00.212998 #3511] DEBUG -- tcpsocket[140aaf0]: queueing packet nr 1 type 34 len 20 
D, [2011-07-26T19:42:00.213033 #3511] DEBUG -- tcpsocket[140aaf0]: sent 24 bytes 
D, [2011-07-26T19:42:00.292238 #3511] DEBUG -- tcpsocket[140aaf0]: read 152 bytes 
D, [2011-07-26T19:42:00.292389 #3511] DEBUG -- tcpsocket[140aaf0]: received packet nr 1 type 31 len 148 
D, [2011-07-26T19:42:00.297526 #3511] DEBUG -- tcpsocket[140aaf0]: queueing packet nr 2 type 32 len 140 
D, [2011-07-26T19:42:00.297627 #3511] DEBUG -- tcpsocket[140aaf0]: sent 144 bytes 
D, [2011-07-26T19:42:00.321754 #3511] DEBUG -- tcpsocket[140aaf0]: read 720 bytes 
D, [2011-07-26T19:42:00.321909 #3511] DEBUG -- tcpsocket[140aaf0]: received packet nr 2 type 33 len 700 
D, [2011-07-26T19:42:00.326688 #3511] DEBUG -- tcpsocket[140aaf0]: queueing packet nr 3 type 21 len 20 
D, [2011-07-26T19:42:00.326793 #3511] DEBUG -- tcpsocket[140aaf0]: sent 24 bytes 
D, [2011-07-26T19:42:00.326927 #3511] DEBUG -- tcpsocket[140aaf0]: received packet nr 3 type 21 len 12 
D, [2011-07-26T19:42:00.327325 #3511] DEBUG -- net.ssh.authentication.session[1475c10]: beginning authentication of `user@host' 
D, [2011-07-26T19:42:00.327519 #3511] DEBUG -- tcpsocket[140aaf0]: queueing packet nr 4 type 5 len 28 
D, [2011-07-26T19:42:00.327604 #3511] DEBUG -- tcpsocket[140aaf0]: sent 52 bytes 
D, [2011-07-26T19:42:00.461124 #3511] DEBUG -- tcpsocket[140aaf0]: read 52 bytes 
D, [2011-07-26T19:42:00.461199 #3511] DEBUG -- tcpsocket[140aaf0]: received packet nr 4 type 6 len 28 
D, [2011-07-26T19:42:00.461260 #3511] DEBUG -- net.ssh.authentication.session[1475c10]: trying publickey 
D, [2011-07-26T19:42:00.461370 #3511] DEBUG -- net.ssh.authentication.agent[1470800]: connecting to ssh-agent 
E, [2011-07-26T19:42:00.461423 #3511] ERROR -- net.ssh.authentication.agent[1470800]: could not connect to ssh-agent 
D, [2011-07-26T19:42:00.461521 #3511] DEBUG -- net.ssh.authentication.methods.publickey[1470bfc]: trying publickey (d7:62:48:07:23:1d:c0:de:80:0d:27:a3:ab:92:72:be) 
D, [2011-07-26T19:42:00.461610 #3511] DEBUG -- tcpsocket[140aaf0]: queueing packet nr 5 type 50 len 364 
D, [2011-07-26T19:42:00.461648 #3511] DEBUG -- tcpsocket[140aaf0]: sent 388 bytes 
D, [2011-07-26T19:42:00.486881 #3511] DEBUG -- tcpsocket[140aaf0]: read 68 bytes 
D, [2011-07-26T19:42:00.487057 #3511] DEBUG -- tcpsocket[140aaf0]: received packet nr 5 type 51 len 44 
D, [2011-07-26T19:42:00.487186 #3511] DEBUG -- net.ssh.authentication.session[1475c10]: allowed methods: publickey,password 
D, [2011-07-26T19:42:00.487261 #3511] DEBUG -- net.ssh.authentication.session[1475c10]: trying password 
E, [2011-07-26T19:42:00.487346 #3511] ERROR -- net.ssh.authentication.session[1475c10]: all authorization methods failed (tried publickey, password) 

Gracias

Answer 1

$ ssh-keygen -t rsa  
$ ssh-copy-id -i ~/.ssh/id_dsa.pub user@machine 
$ ssh user@machine 

require 'net/ssh' 
require 'logger' 

Net::SSH.start(
    'host', 'user', 
    :host_key => "ssh-rsa", 
    :encryption => "blowfish-cbc", 
    :keys => [ "~/.ssh/id_rsa.pub" ], 
    :compression => "zlib" 
) do |session| 
    ... 
end 

que deben ayudarle!