Senha necessária ao tentar ssh em um servidor usando o Cygwin no Windows 7

Estou tentando configurar um servidor em nossa empresa, e uma das coisas que eu gostaria de poder fazer é hospedar repositórios públicos do Git, nos quais posso acessar pelo ssh. Tanto o servidor quanto a estação de trabalho que estou usando para acessá-lo estão executando o Windows 7. de 64 bits. Segui este guia para fazer isso e estou atualmente no estágio em que estou tentando acessar meu servidor com git@atp-dev1onde atp-dev1é um host conhecido.

No entanto, estou no ponto em que devo poder fazer o ssh no servidor sem a necessidade de fornecer uma senha, mas ainda assim ele sempre solicita uma senha. Estas são as etapas que eu tomei:

• Configurou o servidor usando ssh-host-config. StrictModes está definido como 'yes'.
• Gerou um par de chaves ssh chamado 'gitolite-admin' na minha estação de trabalho.
• Copiou a chave pública para o authorized_keysarquivo do servidor usando ssh-copy-ide confirmou que está lá.
• Configurei as permissões da .sshpasta do meu servidor para 700e .ssh/authorized_keyspara 600(tentei definir as permissões na minha estação de trabalho para corresponder a isso, mas algum outro problema com o Cygwin está me impedindo de alterar as permissões -rw-r--r--).

Eu abrir um terminal Cygwin64 e digite o seguinte: ssh -i ~/.ssh/gitolite-admin git@atp-dev1. Em seguida, solicita uma senha. Fazendo isso com -vvvincluído, recebo a seguinte saída:

$ ssh git@atp-dev1 -vvv
OpenSSH_6.7p1, OpenSSL 1.0.1k 8 Jan 2015
debug1: Reading configuration data /etc/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to atp-dev1 [172.16.1.92] port 22.
debug1: Connection established.
debug1: identity file /cygdrive/c/Users/davidfallah/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /cygdrive/c/Users/davidfallah/.ssh/id_rsa-cert type -1
debug1: identity file /cygdrive/c/Users/davidfallah/.ssh/id_dsa type 2
debug1: key_load_public: No such file or directory
debug1: identity file /cygdrive/c/Users/davidfallah/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /cygdrive/c/Users/davidfallah/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /cygdrive/c/Users/davidfallah/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /cygdrive/c/Users/davidfallah/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /cygdrive/c/Users/davidfallah/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.7
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.7
debug1: match: OpenSSH_6.7 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug3: load_hostkeys: loading entries for host "atp-dev1" from file "/cygdrive/c/Users/davidfallah/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /cygdrive/c/Users/davidfallah/.ssh/known_hosts:3
debug3: load_hostkeys: loaded 1 keys
debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-dss-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-dss-cert-v00@openssh.com,ssh-ed25519,ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-md5-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-md5-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
debug2: kex_parse_kexinit: none,zlib@openssh.com,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: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com
debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit: none,zlib@openssh.com
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: setup umac-64-etm@openssh.com
debug1: kex: server->client aes128-ctr umac-64-etm@openssh.com none
debug2: mac_setup: setup umac-64-etm@openssh.com
debug1: kex: client->server aes128-ctr umac-64-etm@openssh.com none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA aa:84:ea:95:b6:b9:ba:52:fa:14:73:62:97:12:30:95
debug3: load_hostkeys: loading entries for host "atp-dev1" from file "/cygdrive/c/Users/davidfallah/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /cygdrive/c/Users/davidfallah/.ssh/known_hosts:3
debug3: load_hostkeys: loaded 1 keys
debug3: load_hostkeys: loading entries for host "172.16.1.92" from file "/cygdrive/c/Users/davidfallah/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /cygdrive/c/Users/davidfallah/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys
debug1: Host 'atp-dev1' is known and matches the ECDSA host key.
debug1: Found key in /cygdrive/c/Users/davidfallah/.ssh/known_hosts:3
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /cygdrive/c/Users/davidfallah/.ssh/id_rsa (0x6000684b0),
debug2: key: /cygdrive/c/Users/davidfallah/.ssh/id_dsa (0x600078a40),
debug2: key: /cygdrive/c/Users/davidfallah/.ssh/id_ecdsa (0x0),
debug2: key: /cygdrive/c/Users/davidfallah/.ssh/id_ed25519 (0x0),
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
debug3: preferred 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 RSA public key: /cygdrive/c/Users/davidfallah/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Offering DSA public key: /cygdrive/c/Users/davidfallah/.ssh/id_dsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Trying private key: /cygdrive/c/Users/davidfallah/.ssh/id_ecdsa
debug3: no such identity: /cygdrive/c/Users/davidfallah/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /cygdrive/c/Users/davidfallah/.ssh/id_ed25519
debug3: no such identity: /cygdrive/c/Users/davidfallah/.ssh/id_ed25519: No such file or directory
debug2: we did not send a packet, disable method
debug3: authmethod_lookup keyboard-interactive
debug3: remaining preferred: password
debug3: authmethod_is_enabled keyboard-interactive
debug1: Next authentication method: keyboard-interactive
debug2: userauth_kbdint
debug2: we sent a keyboard-interactive packet, wait for reply
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug3: userauth_kbdint: disable: no info_req_seen
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred:
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
git@atp-dev1's password:
debug2: we sent a password packet, wait for reply
debug1: Authentication succeeded (password).
Authenticated to atp-dev1 ([172.16.1.92]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: Remote: Ignored authorized keys: bad ownership or modes for directory /home/git
debug1: Remote: Ignored authorized keys: bad ownership or modes for directory /home/git
debug2: callback start
debug2: fd 3 setting TCP_NODELAY
debug3: packet_set_tos: set IP_TOS 0x10
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug2: channel 0: request shell confirm 1
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel_input_status_confirm: type 99 id 0
debug2: PTY allocation request accepted on channel 0
debug2: channel 0: rcvd adjust 2097152
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0

Uma coisa interessante que noto nessa saída é que, depois de ser forçado a autorizar digitando a senha, ele diz que authorized_keysnão foi lido devido a "propriedade inadequada ou modos de diretório" no diretório inicial do Cygwin no servidor ( /home/git). Não sei por que isso acontece, pois tenho certeza de que defini as permissões apropriadas para o diretório pessoal, o .sshdiretório e os .ssharquivos.

Se for relevante, na minha estação de trabalho modifiquei /etc/passwdpara fazer com que o Cygwin usasse o mesmo diretório inicial que o Windows usa (abaixo C:\Users\) em vez de abaixo C:\cygwin64\home. No servidor, ele é usado C:\cygwin64\home\git\como o diretório inicial do Cygwin.

Por fim, se for relevante, o /etc/fstabarquivo da minha estação de trabalho é:

# For a description of the file format, see the Users Guide
# http://cygwin.com/cygwin-ug-net/using.html#mount-table

# This is default anyway:
none /cygdrive cygdrive binary,noacl,posix=0,user 0 0

EDITAR

O etc/sshd_configarquivo no servidor é:

#   $OpenBSD: sshd_config,v 1.93 2014/01/10 05:59:19 djm Exp $

# This is the sshd server system-wide configuration file.  See
# sshd_config(5) for more information.

# This sshd was compiled with PATH=/bin:/usr/sbin:/sbin:/usr/bin

# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented.  Uncommented options override the
# default value.

#Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::

# The default requires explicit activation of protocol 1
#Protocol 2

# HostKey for protocol version 1
#HostKey /etc/ssh_host_key
# HostKeys for protocol version 2
#HostKey /etc/ssh_host_rsa_key
#HostKey /etc/ssh_host_dsa_key
#HostKey /etc/ssh_host_ecdsa_key
#HostKey /etc/ssh_host_ed25519_key

# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 1024

# Ciphers and keying
#RekeyLimit default none

# Logging
# obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
#LogLevel INFO

# Authentication:

#LoginGraceTime 2m
#PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10

#RSAAuthentication yes
#PubkeyAuthentication yes

# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
# but this is overridden so installations will only check .ssh/authorized_keys
AuthorizedKeysFile  .ssh/authorized_keys

#AuthorizedPrincipalsFile none

#AuthorizedKeysCommand none
#AuthorizedKeysCommandUser nobody

# For this to work you will also need host keys in /etc/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes

# To disable tunneled clear text passwords, change to no here!
#PasswordAuthentication yes
#PermitEmptyPasswords no

# Change to no to disable s/key passwords
#ChallengeResponseAuthentication yes

# Kerberos options
#KerberosAuthentication no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
#KerberosGetAFSToken no

# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes

# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication.  Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
#UsePAM no

#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
#X11DisplayOffset 10
#X11UseLocalhost yes
#PermitTTY yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS yes
#PidFile /var/run/sshd.pid
#MaxStartups 10:30:100
#PermitTunnel no
#ChrootDirectory none
#VersionAddendum none

# no default banner path
#Banner none

# override default of no subsystems
Subsystem   sftp    /usr/sbin/sftp-server

# Example of overriding settings on a per-user basis
#Match User anoncvs
#   X11Forwarding no
#   AllowTcpForwarding no
#   PermitTTY no
#   ForceCommand cvs server

Comportamento estranho : tentei verificar as permissões /home/gitnovamente e descobri que estou completamente bloqueado nessa pasta - nem consigo acessá-lo como administrador. Provavelmente vou precisar falar com nosso departamento de TI para resolver isso.

EDIT 2

Conseguiu recuperar a propriedade de /home/git. Não sei por que perdi em primeiro lugar. Estas são as permissões para o diretório inicial e a pasta ssh:

De home/git:

drwxrwx---+ 1 git          ATP-DEV1+None    0 Mar 18 17:05 .
drwxrwxrwt+ 1 davidfallah  Domain Users     0 Mar 18 15:09 ..
-rw-------  1 ATP-DEV1+git ATP-DEV1+None 1099 Mar 19 09:31 .bash_history
-rwxr-xr-x  1 ATP-DEV1+git ATP-DEV1+None 1494 Mar 18 14:09 .bash_profile
-rwxr-xr-x  1 ATP-DEV1+git ATP-DEV1+None 6054 Mar 18 14:09 .bashrc
-rwxr-xr-x  1 ATP-DEV1+git ATP-DEV1+None 1919 Mar 18 14:09 .inputrc
-rwxr-xr-x  1 ATP-DEV1+git ATP-DEV1+None 1236 Mar 18 14:09 .profile
drws------+ 1 git          Domain Users     0 Mar 18 17:59 .ssh

De home/git/.ssh:

drws------+ 1 git Domain Users    0 Mar 18 17:59 .
drwxrwx---+ 1 git ATP-DEV1+None   0 Mar 18 17:05 ..
-rw-------  1 git Domain Users  405 Mar 18 18:00 authorized_keys

EDIT 3

Depois de definir StrictModesa nono servidor e reiniciar o serviço ssh, eu sou capaz de acessar meu servidor sem uma senha usando:

ssh git@atp-dev1 -i ~/.ssh/gitolite-admin

Essa é uma situação abaixo do ideal, pois compromete um pouco a segurança, mas me deixa bastante confiante de que tudo isso é um problema de permissões. Tenho certeza de que as permissões no servidor estão corretas, mas, como mencionei acima e nesta postagem , não consigo alterar as permissões na minha estação de trabalho e provavelmente esse é o problema de bloqueio.