[Chrootssh-users] chroot on AIX 5.2

[<xal...@ya...>]

Hi all.
 
  I'm trying to use chroot-ssh on AIX 5.2 ML2. I have compiled and installed it in a test server and that's what I've found:
 
* When I try to ssh with a chrooted user (home=/home/transfer//./) I get disconnected after authenticating.
* If I configure root as a chroot user (home=//./) and try ssh, I can login without problems.
* When I enable debug for sshd (sshd -ddd) I get the following trace:
 
------------------------
debug2: read_server_config: filename /usr/local/etc/sshd_config
debug1: sshd version OpenSSH_3.8p1
debug3: Not a RSA1 key file /usr/local/etc/ssh_host_dsa_key.
debug1: read PEM private key done: type DSA
debug1: private host key: #0 type 2 DSA
debug3: Not a RSA1 key file /usr/local/etc/ssh_host_dsa_key.
debug1: read PEM private key done: type DSA
debug1: private host key: #1 type 2 DSA
Disabling protocol version 1. Could not load host key
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
debug1: Server will not fork when running in debugging mode.
Connection from XXX.XXX.XXX.XXX port 35050
debug1: Client protocol version 2.0; client software version OpenSSH_3.8p1
debug1: match: OpenSSH_3.8p1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.8p1
debug1: list_hostkey_types: ssh-dss,ssh-dss
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-dss,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rij...@ly...,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rij...@ly...,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hma...@op...,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hma...@op...,hmac-sha1-96,hmac-md5-96
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: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rij...@ly...,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rij...@ly...,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hma...@op...,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hma...@op...,hmac-sha1-96,hmac-md5-96
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_init: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug2: mac_init: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received
debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent
debug2: dh_gen_key: priv key bits set: 126/256
debug2: bits set: 496/1024
debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT
debug2: bits set: 499/1024
debug1: SSH2_MSG_KEX_DH_GEX_REPLY sent
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: KEX done
debug1: userauth-request for user transfer service ssh-connection method none
debug1: attempt 0 failures 0
debug2: input_userauth_request: setting up authctxt for transfer
debug2: input_userauth_request: try method none
debug3: AIX/authenticate result 1, msg You entered an invalid login name or password.
Failed none for transfer from XXX.XXX.XXX.XXX port 35050 ssh2
debug1: userauth-request for user transfer service ssh-connection method publickey
debug1: attempt 1 failures 1
debug2: input_userauth_request: try method publickey
debug1: test whether pkalg/pkblob are acceptable
debug1: temporarily_use_uid: 212/207 (e=0/0)
debug1: trying public key file /home/transfer/.//.ssh/authorized_keys2
debug3: secure_filename: checking '/home/transfer/.ssh'
debug3: secure_filename: checking '/home/transfer'
debug3: secure_filename: terminating check at '/home/transfer'
debug1: matching key found: file /home/transfer/.//.ssh/authorized_keys2, line 1
Found matching DSA key: a9:5c:36:9a:8c:84:89:70:f1:a5:ae:35:17:92:e6:66
debug1: restore_uid: 0/0
debug2: userauth_pubkey: authenticated 0 pkalg ssh-dss
Postponed publickey for transfer from XXX.XXX.XXX.XXX port 35050 ssh2
debug1: userauth-request for user transfer service ssh-connection method publickey
debug1: attempt 2 failures 1
debug2: input_userauth_request: try method publickey
debug1: temporarily_use_uid: 212/207 (e=0/0)
debug1: trying public key file /home/transfer/.//.ssh/authorized_keys2
debug3: secure_filename: checking '/home/transfer/.ssh'
debug3: secure_filename: checking '/home/transfer'
debug3: secure_filename: terminating check at '/home/transfer'
debug1: matching key found: file /home/transfer/.//.ssh/authorized_keys2, line 1
Found matching DSA key: a9:5c:36:9a:8c:84:89:70:f1:a5:ae:35:17:92:e6:66
debug1: restore_uid: 0/0
debug1: ssh_dss_verify: signature correct
debug2: userauth_pubkey: authenticated 1 pkalg ssh-dss
Accepted publickey for transfer from XXX.XXX.XXX.XXX port 35050 ssh2
debug1: Entering interactive session for SSH2.
debug2: fd 3 setting O_NONBLOCK
debug2: fd 7 setting O_NONBLOCK
debug1: server_init_dispatch_20
debug1: server_input_channel_open: ctype session rchan 0 win 65536 max 16384
debug1: input_session_request
debug1: channel 0: new [server-session]
debug1: session_new: init
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 pty-req reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req pty-req
debug1: Allocating pty.
debug1: session_pty_req: session 0 alloc /dev/pts/3
debug3: tty_parse_modes: SSH2 n_bytes 251
debug3: tty_parse_modes: ospeed 9600
debug3: tty_parse_modes: ispeed 9600
debug3: tty_parse_modes: 1 3
debug3: tty_parse_modes: 2 28
debug3: tty_parse_modes: 3 127
debug3: tty_parse_modes: 4 21
debug3: tty_parse_modes: 5 4
debug3: tty_parse_modes: 6 0
debug3: tty_parse_modes: 7 0
debug3: tty_parse_modes: 8 17
debug3: tty_parse_modes: 9 19
debug3: tty_parse_modes: 10 26
debug3: tty_parse_modes: 11 25
debug3: tty_parse_modes: 12 18
debug3: tty_parse_modes: 14 22
debug3: tty_parse_modes: 30 1
debug3: tty_parse_modes: 31 0
debug3: tty_parse_modes: 32 0
debug3: tty_parse_modes: 33 0
debug3: tty_parse_modes: 34 0
debug3: tty_parse_modes: 35 0
debug3: tty_parse_modes: 36 1
debug3: tty_parse_modes: 37 0
debug3: tty_parse_modes: 38 0
debug3: tty_parse_modes: 39 0
debug3: tty_parse_modes: 40 0
debug3: tty_parse_modes: 41 1
debug3: tty_parse_modes: 50 1
debug3: tty_parse_modes: 51 1
debug3: tty_parse_modes: 52 0
debug3: tty_parse_modes: 53 1
debug3: tty_parse_modes: 54 1
debug3: tty_parse_modes: 55 1
debug3: tty_parse_modes: 56 0
debug3: tty_parse_modes: 57 0
debug3: tty_parse_modes: 58 0
debug3: tty_parse_modes: 59 1
debug3: tty_parse_modes: 60 1
debug3: tty_parse_modes: 61 1
debug3: tty_parse_modes: 62 1
debug3: tty_parse_modes: 70 1
debug3: tty_parse_modes: 71 0
debug3: tty_parse_modes: 72 1
debug3: tty_parse_modes: 73 0
debug3: tty_parse_modes: 74 0
debug3: tty_parse_modes: 75 0
debug3: tty_parse_modes: 90 1
debug3: tty_parse_modes: 91 1
debug3: tty_parse_modes: 92 0
debug3: tty_parse_modes: 93 0
debug1: server_input_channel_req: channel 0 request shell reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req shell
debug2: fd 4 setting TCP_NODELAY
debug2: channel 0: rfd 9 isatty
debug2: fd 9 setting O_NONBLOCK
debug2: fd 8 is O_NONBLOCK
setsid: Not owner
debug2: channel 0: read<=0 rfd 9 len -1
debug2: channel 0: read failed
debug2: channel 0: close_read
debug2: channel 0: input open -> drain
debug2: channel 0: ibuf empty
debug2: channel 0: send eof
debug2: channel 0: input drain -> closed
debug1: Received SIGCHLD.
debug1: session_by_pid: pid 61616
debug1: session_exit_message: session 0 channel 0 pid 61616
debug2: channel 0: request exit-status
debug1: session_exit_message: release channel 0
debug2: channel 0: write failed
debug2: channel 0: close_write
debug2: channel 0: output open -> closed
debug1: session_close: session 0 pid 61616
debug1: session_pty_cleanup: session 0 release /dev/pts/3
debug2: channel 0: send close
debug3: channel 0: will not send data after close
debug2: notify_done: reading
debug3: channel 0: will not send data after close
debug2: channel 0: rcvd close
debug3: channel 0: will not send data after close
debug2: channel 0: is dead
debug2: channel 0: garbage collecting
debug1: channel 0: free: server-session, nchannels 1
debug3: channel 0: status: The following connections are open:
  #0 server-session (t4 r0 i3/0 o3/0 fd -1/-1)
debug3: channel 0: close_fds r -1 w -1 e -1
Connection closed by XXX.XXX.XXX.XXX
debug1: do_cleanup
Closing connection to XXX.XXX.XXX.XXX
------------------------

 
And in the client's screen:
 
------------------------
debug3: Trying to reverse map address XXX.XXX.XXX.XXX.
***************************************************************
*                                                                            *
*                                                                            *
*  Welcome to AIX Version 5.2!                                *
*                                                                            *
*                                                                            *
*  Please see the README file in /usr/lpp/bos for information pertinent to    *
*  this release of the AIX Operating System.               *
*                                                                             *
*                                                                             *
****************************************************************
Couldn't chroot to user directory /home/transfer
debug1: do_cleanup
Connection to testhost closed.
------------------------
 
I see the problem is that in AIX chroot can only be used by processes with root authority, but I have a working version of chroot-ssh in AIX 4.3.3 (which I didn't install), that, of course, doesn't works in AIX 5.2 just copying it.
 
Does anyone have chroot-ssh running in AIX 5.2 ?
Could you give me any clue to make it work ?
 
Thanks in advance.


		
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