Настройка ChrootDirectory для sftp

[Александр Пчельников]

Добрый день!

Не устанавливается подключение по sftp с заданным ChrootDirectory для пользователя. Возникают следующие ошибки /usr/sbin/sshd -ddd &:

Код:

...
debug3: safely_chroot: checking '/'
debug3: safely_chroot: checking '/home/'
debug3: safely_chroot: checking '/home/sftp_user'
Changed root directory to "/home/sftp_user"
...
debug1: Entering interactive session for SSH2.
pipe(notify_pipe) failed Function not implemented
debug1: server_init_dispatch_20
...
debug1: session_input_channel_req: session 0 req subsystem
subsystem request for sftp
debug1: subsystem: exec() internal-sftp
debug1: Forced command (config) 'internal-sftp'
do_exec_no_pty: pipe in: Function not implemented
subsystem request for sftp failed, subsystem not found
debug1: server_input_channel_req: channel 0 request exec reply 1
...

ЗОСРВ "НЕЙТРИНО" КПДА.10964-01

Вывод /usr/sbin/sshd -ddd &

(щёлкните чтобы показать/скрыть)

/ $ /usr/sbin/sshd -ddd &
[1] 3194901
/ $ debug2: load_server_config: filename /etc/ssh/sshd_config
debug2: load_server_config: done config len = 424
debug2: parse_server_config: config /etc/ssh/sshd_config len 424
debug1: Config token is port
debug3: /etc/ssh/sshd_config:12 setting Port 22
debug1: Config token is addressfamily
debug3: /etc/ssh/sshd_config:13 setting AddressFamily any
debug1: Config token is protocol
debug3: /etc/ssh/sshd_config:20 setting Protocol 2
debug1: Config token is hostkey
debug3: /etc/ssh/sshd_config:25 setting HostKey /etc/ssh/ssh_host_rsa_key
debug1: Config token is hostkey
debug3: /etc/ssh/sshd_config:26 setting HostKey /etc/ssh/ssh_host_dsa_key
debug1: Config token is logingracetime
debug3: /etc/ssh/sshd_config:40 setting LoginGraceTime 600
debug1: Config token is permitrootlogin
debug3: /etc/ssh/sshd_config:41 setting PermitRootLogin yes
debug1: Config token is authorizedkeysfile
debug3: /etc/ssh/sshd_config:49 setting AuthorizedKeysFile .ssh/authorized_keys
debug1: Config token is printmotd
debug3: /etc/ssh/sshd_config:85 setting PrintMotd yes
debug1: Config token is subsystem
debug3: /etc/ssh/sshd_config:106 setting Subsystem sftp internal-sftp
debug1: Config token is match
debug3: checking syntax for 'Match User sftp_user'
debug1: Config token is chrootdirectory
debug1: Config token is forcecommand
debug1: HPN Buffer Size: 32768
debug1: sshd version OpenSSH_5.2 QNX_Secure_Shell-20090621
debug3: Not a RSA1 key file /etc/ssh/ssh_host_rsa_key.
debug1: read PEM private key done: type RSA
debug1: private host key: #0 type 1 RSA
debug3: Not a RSA1 key file /etc/ssh/ssh_host_dsa_key.
debug1: read PEM private key done: type DSA
debug1: private host key: #1 type 2 DSA
debug1: rexec_argv[0]='/usr/sbin/sshd'
debug1: rexec_argv[1]='-ddd'
debug2: fd 3 setting O_NONBLOCK
debug1: Bind to port 22 on 0.0.0.0.
debug1: Server TCP RWIN socket size: 32768
debug1: HPN Buffer Size: 32768
Server listening on 0.0.0.0 port 22.
debug1: fd 4 clearing O_NONBLOCK
debug1: Server will not fork when running in debugging mode.
debug3: send_rexec_state: entering fd = 7 config len 424
debug3: ssh_msg_send: type 0
debug3: send_rexec_state: done
debug1: rexec start in 4 out 4 newsock 4 pipe -1 sock 7
debug1: inetd sockets after dupping: 3, 3
Connection from 10.1.16.221 port 51868
debug1: HPN Disabled: 0, HPN Buffer Size: 32768
debug1: Client protocol version 2.0; client software version FileZilla_3.39.0
SSH: Server;Ltype: Version;Remote: 10.1.16.221-51868;Protocol: 2.0;Client: FileZilla_3.39.0
debug1: no match: FileZilla_3.39.0
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.2 QNX_Secure_Shell-20090621-hpn13v6
debug2: fd 3 setting O_NONBLOCK
debug2: Network child is on pid 3207203
debug3: preauth child monitor started
debug3: mm_request_receive entering
debug3: privsep user:group 15:6
debug1: permanently_set_uid: 15/6
debug1: MYFLAG IS 1
debug1: list_hostkey_types: ssh-rsa,ssh-dss
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: AUTH STATE IS 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,rijndael-cbc@lysator.liu.se
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,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
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: kex_parse_kexinit: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,rsa2048-sha256,rsa1024-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-ed25519,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes256-gcm@openssh.com,aes256-ctr,aes256-cbc,rijndael-cbc@lysator.liu.se,aes192-ctr,aes192-cbc,aes128-gcm@openssh.com,aes128-ctr,aes128-cbc,chacha20-poly1305@openssh.com,blowfish-ctr,blowfish-cbc,3des-ctr,3des-cbc,arcfour256,arcfour128
debug2: kex_parse_kexinit: aes256-gcm@openssh.com,aes256-ctr,aes256-cbc,rijndael-cbc@lysator.liu.se,aes192-ctr,aes192-cbc,aes128-gcm@openssh.com,aes128-ctr,aes128-cbc,chacha20-poly1305@openssh.com,blowfish-ctr,blowfish-cbc,3des-ctr,3des-cbc,arcfour256,arcfour128
debug2: kex_parse_kexinit: hmac-sha2-256,hmac-sha1,hmac-sha1-96,hmac-md5,hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-etm@openssh.com
debug2: kex_parse_kexinit: hmac-sha2-256,hmac-sha1,hmac-sha1-96,hmac-md5,hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-etm@openssh.com
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
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-sha1
debug1: REQUESTED ENC.NAME is 'aes256-ctr'
debug1: kex: client->server aes256-ctr hmac-sha1 none
SSH: Server;Ltype: Kex;Remote: 10.1.16.221-51868;Enc: aes256-ctr;MAC: hmac-sha1;Comp: none
debug2: mac_setup: found hmac-sha1
debug1: REQUESTED ENC.NAME is 'aes256-ctr'
debug1: kex: server->client aes256-ctr hmac-sha1 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received
debug3: mm_request_send entering: type 0
debug3: mm_choose_dh: waiting for MONITOR_ANS_MODULI
debug3: monitor_read: checking request 0
debug3: mm_request_receive_expect entering: type 1
debug3: mm_answer_moduli: got parameters: 1024 4096 8192
debug3: mm_request_receive entering
debug3: mm_request_send entering: type 1
debug2: monitor_read: 0 used once, disabling now
debug3: mm_choose_dh: remaining 0
debug3: mm_request_receive entering
debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent
debug2: dh_gen_key: priv key bits set: 264/512
debug2: bits set: 2054/4096
debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT
debug2: bits set: 2025/4096
debug3: mm_key_sign entering
debug3: mm_request_send entering: type 4
debug3: mm_key_sign: waiting for MONITOR_ANS_SIGN
debug3: monitor_read: checking request 4
debug3: mm_request_receive_expect entering: type 5
debug3: mm_answer_sign
debug3: mm_request_receive entering
debug3: mm_answer_sign: signature 80bdb18(271)
debug3: mm_request_send entering: type 5
debug2: monitor_read: 4 used once, disabling now
debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent
debug3: mm_request_receive entering
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug2: cipher_init: set keylen (16 -> 32)
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug2: cipher_init: set keylen (16 -> 32)
debug1: SSH2_MSG_NEWKEYS received
debug1: KEX done
debug1: userauth-request for user sftp_user service ssh-connection method none
SSH: Server;Ltype: Authname;Remote: 10.1.16.221-51868;Name: sftp_user
debug1: attempt 0 failures 0
debug3: mm_getpwnamallow entering
debug3: mm_request_send entering: type 6
debug3: mm_getpwnamallow: waiting for MONITOR_ANS_PWNAM
debug3: monitor_read: checking request 6
debug3: mm_request_receive_expect entering: type 7
debug3: mm_answer_pwnamallow
debug3: mm_request_receive entering
debug3: Trying to reverse map address 10.1.16.221.
debug2: parse_server_config: config reprocess config len 424
debug1: Config token is port
debug1: Config token is addressfamily
debug1: Config token is protocol
debug1: Config token is hostkey
debug1: Config token is hostkey
debug1: Config token is logingracetime
debug1: Config token is permitrootlogin
debug1: Config token is authorizedkeysfile
debug1: Config token is printmotd
debug1: Config token is subsystem
debug1: Config token is match
debug3: checking match for 'User sftp_user' user sftp_user host 10.1.16.221 addr 10.1.16.221
debug1: user sftp_user matched 'User sftp_user' at line 123
debug3: match found
debug1: Config token is chrootdirectory
debug3: reprocess config:127 setting ChrootDirectory /home/sftp_user
debug1: Config token is forcecommand
debug3: reprocess config:128 setting ForceCommand internal-sftp
debug3: mm_answer_pwnamallow: sending MONITOR_ANS_PWNAM: 1
debug3: mm_request_send entering: type 7
debug2: monitor_read: 6 used once, disabling now
debug3: mm_request_receive entering
debug2: input_userauth_request: setting up authctxt for sftp_user
debug3: mm_inform_authserv entering
debug3: mm_request_send entering: type 3
debug2: input_userauth_request: try method none
debug3: monitor_read: checking request 3
debug3: mm_auth_password entering
debug3: mm_answer_authserv: service=ssh-connection, style=
debug3: mm_request_send entering: type 10
debug2: monitor_read: 3 used once, disabling now
debug3: mm_request_receive entering
debug3: mm_auth_password: waiting for MONITOR_ANS_AUTHPASSWORD
debug3: mm_request_receive_expect entering: type 11
debug3: monitor_read: checking request 10
debug3: mm_request_receive entering
debug3: mm_answer_authpassword: sending result 0
debug3: mm_request_send entering: type 11
debug3: mm_auth_password: user not authenticated
Failed none for sftp_user from 10.1.16.221 port 51868 ssh2
debug3: mm_request_receive entering
debug1: userauth-request for user sftp_user service ssh-connection method keyboard-interactive
debug1: attempt 1 failures 0
debug2: input_userauth_request: try method keyboard-interactive
debug1: keyboard-interactive devs
debug1: auth2_challenge: user=sftp_user devs=
debug1: kbdint_alloc: devices ''
debug2: auth2_challenge_start: devices
debug1: userauth-request for user sftp_user service ssh-connection method password
debug1: attempt 2 failures 1
debug2: input_userauth_request: try method password
debug3: mm_auth_password entering
debug3: mm_request_send entering: type 10
debug3: mm_auth_password: waiting for MONITOR_ANS_AUTHPASSWORD
debug3: monitor_read: checking request 10
debug3: mm_request_receive_expect entering: type 11
debug3: mm_request_receive entering
debug3: mm_answer_authpassword: sending result 1
debug3: mm_request_send entering: type 11
Accepted password for sftp_user from 10.1.16.221 port 51868 ssh2
debug3: mm_auth_password: user authenticated
debug1: monitor_child_preauth: sftp_user has been authenticated by privileged process
debug3: mm_get_keystate: Waiting for new keys
debug3: mm_send_keystate: Sending new keys: 80ac768 80ac888
debug3: mm_request_receive_expect entering: type 24
debug3: mm_newkeys_to_blob: converting 80ac768
debug3: mm_request_receive entering
debug3: mm_newkeys_to_blob: converting 80ac888
debug3: mm_send_keystate: New keys have been sent
debug3: mm_send_keystate: Sending compression state
debug3: mm_request_send entering: type 24
debug3: mm_send_keystate: Finished sending state
debug3: mm_newkeys_from_blob: 80ac680(139)
debug2: mac_setup: found hmac-sha1
debug3: mm_get_keystate: Waiting for second key
debug3: mm_newkeys_from_blob: 80ac680(139)
debug2: mac_setup: found hmac-sha1
debug3: mm_get_keystate: Getting compression state
debug3: mm_get_keystate: Getting Network I/O buffers
debug3: mm_share_sync: Share sync
debug3: mm_share_sync: Share sync end
User child is on pid 3211299
debug3: mm_request_receive entering
debug3: safely_chroot: checking '/'
debug3: safely_chroot: checking '/home/'
debug3: safely_chroot: checking '/home/sftp_user'
Changed root directory to "/home/sftp_user"
debug1: permanently_set_uid: 101/6
debug2: set_newkeys: mode 0
debug2: cipher_init: set keylen (16 -> 32)
debug2: set_newkeys: mode 1
debug2: cipher_init: set keylen (16 -> 32)
debug1: Entering interactive session for SSH2.
pipe(notify_pipe) failed Function not implemented
debug1: server_init_dispatch_20
debug3: Received SSH2_MSG_IGNORE
debug1: server_input_channel_open: ctype session rchan 256 win 2147483647 max 16384
debug1: input_session_request
debug1: channel 0: new [server-session]
debug2: session_new: allocate (allocated 0 max 10)
debug3: session_unused: session id 0 unused
debug1: session_new: session 0
debug1: session_open: channel 0
debug1: session_open: session 0: link with channel 0
debug1: server_input_channel_open: confirm session
debug1: server_input_channel_req: channel 0 request simple@putty.projects.tartarus.org reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req simple@putty.projects.tartarus.org
debug1: server_input_channel_req: channel 0 request subsystem reply 1
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req subsystem
subsystem request for sftp
debug1: subsystem: exec() internal-sftp
debug1: Forced command (config) 'internal-sftp'
do_exec_no_pty: pipe in: Function not implemented
subsystem request for sftp failed, subsystem not found
debug1: server_input_channel_req: channel 0 request exec reply 1
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req exec
debug1: Forced command (config) 'internal-sftp'
do_exec_no_pty: pipe in: Function not implemented
Connection closed by 10.1.16.221
debug1: channel 0: free: server-session, nchannels 1
debug3: channel 0: status: The following connections are open:
  #0 server-session (t10 r256 i0/0 o0/0 fd -1/-1 cfd -1)

debug3: channel 0: close_fds r -1 w -1 e -1 c -1
debug1: session_close: session 0 pid 0
debug3: session_unused: session id 0 unused
SSH: Server;LType: Throughput;Remote: 10.1.16.221-51868;IN: 124;OUT: 416;Duration: 0.1;tPut_in: 2067.0;tPut_out: 6934.4
debug1: do_cleanup
Transferred: sent 2624, received 2536 bytes
Closing connection to 10.1.16.221 port 51868
debug3: mm_request_send entering: type 60
debug3: monitor_read: checking request 60
debug3: mm_answer_term: tearing down sessions

[1] + Done                 /usr/sbin/sshd -ddd

Конфигурация sshd_config

(щёлкните чтобы показать/скрыть)

#   $NetBSD: sshd_config,v 1.31 2008/06/22 15:42:51 christos Exp $
#   $OpenBSD: sshd_config,v 1.77 2008/02/08 23:24:07 djm Exp $

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

# 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 change a
# default value.

Port 22
AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::

# Disable legacy (protocol version 1) support in the server for new
# installations. In future the default will change to require explicit
# activation of protocol 1
Protocol 2

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

# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 768

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

# Authentication:

# Slow machines or long keys may require more processing time.
LoginGraceTime 600
PermitRootLogin yes
#StrictModes yes
#MaxAuthTries 6

#AllowUsers root

#RSAAuthentication yes
#PubkeyAuthentication yes
AuthorizedKeysFile   .ssh/authorized_keys

# For this to work you will also need host keys in /etc/ssh/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

#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding no
# If you use xorg from pkgsrc then uncomment the following line.
#XAuthLocation /usr/pkg/bin/xauth
#X11DisplayOffset 10
#X11UseLocalhost yes
PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#UsePam no
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS yes
#PidFile /var/run/sshd.pid
#MaxStartups 10
#PermitTunnel no
#ChrootDirectory none

# no default banner path
#Banner none

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

# the following are HPN related configuration options
# tcp receive buffer polling. disable in non autotuning kernels
#TcpRcvBufPoll yes
 
# allow the use of the none cipher
#NoneEnabled no

# disable hpn performance boosts.
#HPNDisabled no

# buffer size for hpn to non-hpn connections
#HPNBufferSize 2048


# Example of overriding settings on a per-user basis
Match User sftp_user
#   X11Forwarding no
#   AllowTcpForwarding no
#   ForceCommand cvs server
   ChrootDirectory /home/sftp_user
   ForceCommand internal-sftp

Запись в /etc/passwd

(щёлкните чтобы показать/скрыть)

sftp_user:x:101:6:sftp_user:/home/sftp_user:/bin/false

Запись в /etc/group

(щёлкните чтобы показать/скрыть)

sshd:x:6:sftp_user

Настройка доступа для папок

(щёлкните чтобы показать/скрыть)

ls -l /
drwxr-xr-x  4 root      root           4096 Jan 24 16:37 home
ls -l /home
drwxr-xr-x  2 root      root           4096 Jan 24 16:37 sftp_user
ls -l /var/chroot
drwxr-xr-x  2 root      root           4096 Jan 22 11:23 sshd

[Олег Большаков]

Здравствуйте, Александр! Прорабатываем Ваш вопрос. Потребуется какое-то время для выработки рекомендаций.

[Олег Большаков]

Александр, поскольку Вы также обращались к нам по электронной почте, то ответил Вам на e-mail. Мы подготовили обновлённые компоненты, которые обеспечивают необходимую Вам функциональность. Если задача ещё актуальна для Вас, то ответьте на моё электронное письмо и сообщите, с какой процессорной архитектурой Вы работаете.

[Олег Большаков]

Для информации. Насколько мне известно, обновлённые модули помогли в решении задачи.