Não é possível ssh sem senha [duplicado]

Question

Eu tenho tentado instalar uma cópia de arquivo remota sem senha entre duas máquinas Linux. Eu adicionei meu .ssh / id_rsa.pub de local para remoto .ssh / authorized_keys. Eu também configurei permissões de arquivo corretas (700 para meu diretório home e .ssh, 600 para authorized_keys).

SSH consistentemente continua me pedindo senha. Alguma ideia? Todas as informações necessárias devem estar abaixo.

Eu não tenho acesso root a qualquer uma dessas duas máquinas.

local:

$ uname -a && ssh -V
Linux localhost 2.6.32-xxx.x86_64 #1 SMP Tue Dec 18 15:04:44 PST 2012 x86_64     x86_64 x86_64 GNU/Linux
OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010

remoto:

uname -a && ssh -V
Linux remotehost 4.0.5-xxx.x86_64 #1 SMP Tue Jun 9 15:09:25 PDT 2015 x86_64 x86_64 x86_64 GNU/Linux
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013

depuração:

OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to remote [1.2.3.4] port 22.
debug1: Connection established.
debug3: Not a RSA1 key file .ssh/myKey.
debug2: key_type_from_name: unknown key type '-----BEGIN'
debug3: key_read: missing keytype
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug2: key_type_from_name: unknown key type '-----END'
debug3: key_read: missing keytype
debug1: identity file .ssh/myKey type 1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3
debug1: match: OpenSSH_5.3 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.3
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
debug3: Wrote 792 bytes for a total of 813
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: 
debug2: kex_parse_kexinit: first_kex_follows 0 
debug2: kex_parse_kexinit: reserved 0 
debug2: mac_setup: found hmac-md5
debug1: kex: server->client aes128-ctr hmac-md5 none
debug2: mac_setup: found hmac-md5
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug3: Wrote 24 bytes for a total of 837
debug2: dh_gen_key: priv key bits set: 119/256
debug2: bits set: 491/1024
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: Wrote 144 bytes for a total of 981
debug3: check_host_in_hostfile: filename /some/directory/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 14
debug3: check_host_in_hostfile: filename /some/directory/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 14
debug1: Host 'remote' is known and matches the RSA host key.
debug1: Found key in /some/directory/.ssh/known_hosts:14
debug2: bits set: 496/1024
debug1: ssh_rsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: Wrote 16 bytes for a total of 997
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug3: Wrote 48 bytes for a total of 1045
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /some/directory/.ssh/id_rsa (0x7fbf18b8a0b0)
debug2: key: .ssh/myKey (0x7fbf18b86460)
debug3: Wrote 64 bytes for a total of 1109
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering public key: /some/directory/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug3: Wrote 624 bytes for a total of 1733
debug1: Authentications that can continue: publickey,password
debug1: Offering public key: .ssh/myKey
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug3: Wrote 368 bytes for a total of 2101
debug1: Authentications that can continue: publickey,password
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
xxxx@remotehost's password: 

Adicionando conforme solicitado pelos comentadores:

ls -lZd / /home /home/xxxx /home/xxxx/.ssh /home/xxxx/.ssh/authorized_keys
drwxr-xr-x root   root     ?                                /
drwxr-xr-x root   root     ?                                /home
drwx------ xxxx   xxxx_gsa ?                                /home/xxxx
drwx------ xxxx   xxxx_gsa ?                                /home/xxxx/.ssh
-rw------- xxxx   xxxx_gsa ?                                /home/xxxx/.ssh/authorized_keys

    

Answer 1

Suas permissões informam o problema:

-rw------- xxxx_p xxxx_gsa ?                                /home/xxxx/.ssh/authorized_keys

De acordo com a página de manual de sshd :

~/.ssh/authorized_keys

[...]

If this file, the ~/.ssh directory, or the user's home directory are writable by other users, then the file could be modified or replaced by unauthorized users. In this case, sshd will not allow it to be used unless the StrictModes option has been set to “no”.

Você precisa garantir que /home/xxxx/.ssh/authorized_keys seja de propriedade do usuário xxxx e não xxxx_p . Caso contrário, o servidor rejeitará o uso desse arquivo.

    

Answer 2

debug3: Not a RSA1 key file .ssh/myKey.
debug2: key_type_from_name: unknown key type '-----BEGIN'
                                              ^^^^ bzzt

Essa segunda linha parece o seu problema.

Diferentes implementações do ssh usam diferentes formatos. Diferentes versões aderem a um formato; O OpenSSH tem sido consistente por muitos anos. ISTR vendo uma string "BEGIN" como aquela em outro lugar, talvez em PuTTY.

Eu uso o OpenSSH e minhas authorized_keys são assim:

$ cut -b-60 ~/.ssh/authorized_keys 
ssh-dss AAAAB3NzaC1kc3MAAACBANSxMDLaL3O6jg528/QeoCxw78qgVrqc
ssh-dss AAAAB3NzaC1kc3MAAACBAOgQyLwNkOAzsfxzm8WcYJYp/asSS7Lb
ssh-dss AAAAB3NzaC1kc3MAAACBAMyZLbylDmVUkBPEltOap1x4l4WGg5Il

Tente gerar uma chave pública no controle remoto e veja se ele se parece com o que você instalou em authorized_keys . Se não, você vai querer descobrir quem é o ssh / sshd em execução e como fornecer uma chave formatada corretamente.