From: derek AT biddersedge DOT com (Derek Young) Subject: Re: ssh/sshd and /dev/tty 5 Jan 1998 13:48:33 -0800 Message-ID: <34B14F6D.1C86F715.cygnus.gnu-win32@biddersedge.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit To: "Patrick J. Fay" Cc: chuck AT ethereal DOT ru, gnu-win32 AT cygnus DOT com I followed all your instructions and everything seems to be set up OK. I was able to fix the problem where the server said "bad modes for /derek". StrictModes was turned on in the /etc/ssh_config file. I turned this off temporarily. I am still getting the "You have no controlling tty and no DISPLAY. Cannot read passphrase" error message. I've traced this down to readpass.c. It's trying to open /dev/tty. if (from_stdin) f = stdin; else { /* Read the passphrase from /dev/tty to make it possible to ask it even when stdin has been redirected. */ f = fopen("/dev/tty", "r"); if (!f) { if (getenv("DISPLAY")) { // read via display // .... [ommitted] ... } /* No controlling terminal and no DISPLAY. Nowhere to read. */ fprintf(stderr, "You have no controlling tty and no DISPLAY. Cannot read passphrase.\n"); exit(1); } } The code is trying to open /dev/tty, which fails. If I have DISPLAY set to something, ssh tries running ssh-askpass to prompt for the password on an X display. This program complains about X11.dll (or something like that) not being found (I'm not running X). I read in a previous message you could do "mount con /dev/tty" to simulate a tty, but this didn't work for me. I'm guess that you might be running X and that's why this works for you? Have any ideas on a workaround for getting /dev/tty to work? I suppose I could apply the patches to ssh and recompile it, but if there's an easier work around I'd rather not. Thanks again for your help. -- Derek Young Patrick J. Fay wrote: > Hello Derek, > Do on the pc: > mkdir /derek/.ssh > ssh-keygen > tell it to put the file in /derek/.ssh/identity > give it a passphrase. > ftp (or somehow get) your new identity* files to the other > host in your otherhost:~derek/.ssh/identity* > copy the ~/.ssh/identity.pub file to ~/.ssh/authorized_keys > Note that each system that you want to ssh to will need a copy > of your identity.pub in it's authorized_keys. > That is how it 'knows' who to let in. > Try that and let me know what happens. You should get further anyway. > Pat > > On your pc (or on a host with ssh-keygen) you need to run ssh-keygen > On Mon, 5 Jan 1998, Derek Young wrote: > > > Hello, I have just installed the ssh/sshd software made available from > > http://gnu-win32.paranoia.ru/ , but I have not been able to get it to > > work. I changed my mounts to binary, set up the sshd config files, and > > started sshd. I have Sergey's coolview DLL installed. I would like to > > get this working so I can use it with CVS. > > > > When I run ssh, I get the message "You have no controlling tty and no > > DISPLAY. Cannot read passphrase." Do I need some special environment > > variables set to run this? I've also tried starting with the -t > > command, but this has the same effect. > > > > > > I am running ssh from a regular command prompt (not bash or tcsh). Even > > if I run under bash I get the same error message. I have run ssh-keygen > > to create my key in my .ssh directory. > > > > I started sshd with the -d command to get debugging info. After sshd > > starts up with this... > > > > debug: sshd version 1.2.21 [] > > debug: Initializing random number generator; seed file > > /etc/ssh_random_seed > > log: Server listening on port 22. > > log: Generating 768 bit RSA key. > > Generating p: ..........++ (distance 168) > > Generating q: ................++ (distance 184) > > Computing the keys... > > Testing the keys... > > Key generation complete. > > log: RSA key generation complete. > > > > ... and I run ssh I get this output from sshd... > > > > debug: Server will not fork when running in debugging mode. > > log: Connection from 24.128.36.106 port 3539 > > debug: Client protocol version 1.5; client software version 1.2.21 > > debug: Sent 768 bit public key and 1024 bit host key. > > debug: Encryption type: idea > > debug: Received session key; encryption turned on. > > debug: Attempting authentication for dyoung. > > log: Rsa authentication refused for dyoung: bad modes for /derek > > debug: RSA authentication for dyoung failed. > > fatal: Connection closed by remote host. > > debug: Calling cleanup 0x40e9e4(0x0) > > > > > > I don't know what "bad modes for /derek" means (/derek is my home > > directory). Do I need some special permissions on this directory? This > > directory is listed in my /etc/passwd file as well. sshd and ssh were > > started as the same user, and I'm also trying to login with this user > > name. > > > > Have I missed something? > > > > thanks for any help, > > > > -- Derek Young > > > > > > > > > > Patrick Fay, Ph.D., Intel Corp. email: pfay AT co DOT intel DOT com > Los Alamos National Lab wk: (505) 665-9141 > CTI M.S. B296 fax: (505) 667-5921 > Los Alamos NM 87545 ASCI-RED http://www.acl.lanl.gov/~pfay/teraflop - For help on using this list (especially unsubscribing), send a message to "gnu-win32-request AT cygnus DOT com" with one line of text: "help".