search for: pam_prompt_echo_off

I have been unable to use any challenge/response based pam module (eg. pam_opie.so) for ssh authentication, because the challenge (needed to compute an appropriate response) is never shown during login. do_pam_conversation() in auth-pam.c will not print any prompts while in the INITIAL_LOGIN state, queueing them for later printing. Should users be able to override this (usually correct)

Here is a patch that does TIS auth via PAM. It's controlled by a switch in the sshd_config. You'd use it by having a PAM module that sets PAM_PROMPT_ECHO_ON. eg, you could use it with pam_skey or pam_smxs. The patch is against the 2.9.9p2 distribution. I'm not on the list, a reply if this patch is accepted would be great. (But not required, I know some folks have a distaste for

...asschange_conv(284) smb_pam_passchange_conv: starting converstation for 1 messages [2009/11/30 23:23:37, 10] auth/pampass.c:smb_pam_passchange_conv(312) smb_pam_passchange_conv: Processing message 0 [2009/11/30 23:23:37, 10] auth/pampass.c:smb_pam_passchange_conv(346) smb_pam_passchange_conv: PAM_PROMPT_ECHO_OFF: PAM said: New password: [2009/11/30 23:23:37, 10] auth/pampass.c:smb_pam_passchange_conv(352) smb_pam_passchange_conv: PAM_PROMPT_ECHO_OFF: trying to match |*enter new * password:*| to |New password:| [2009/11/30 23:23:37, 10] auth/pampass.c:smb_pam_passchange_conv(352) smb_pam_passchange_con...

I tried replacing readpassphrase() for v2.9.9p2 on Sol8 with a different version that just calls getpassphrase(). It appears to solve the echo problem when the user tries to login in interactive mode and needs to change their password. Can anyone else try this with v2.9.9p2 on Solaris? Be sure to add: #define HAVE_GETPASSPHRASE ... to config.h when compiling (since it's not a configurable

...uot;); + response = packet_get_string(&dlen); + debug("got response '%s'", response); + packet_integrity_check(plen, 4 + dlen, type); + reply[count].resp = xstrdup(response); + reply[count].resp_retcode = PAM_SUCCESS; + xfree(response); + break; + case PAM_PROMPT_ECHO_OFF: - if (__pampasswd == NULL) { + if (__pampasswd == NULL || + pamprompt != PAM_PROMPT_ECHO_OFF) { free(reply); return PAM_CONV_ERR; } @@ -198,8 +236,8 @@ } } -/* Attempt password authentation using PAM */ -int auth_pam_password(struct passwd *pw, const char *passwo...

...ITIAL_LOGIN; +/* remember whether pam_acct_mgmt() returned PAM_NEWAUTHTOK_REQD */ +static int password_change_required = 0; + +/* + * PAM conversation function. + * There are two states this can run in. + * + * INITIAL_LOGIN mode simply feeds the password from the client into + * PAM in response to PAM_PROMPT_ECHO_OFF, and collects output + * messages with pam_msg_cat(). This is used during initial + * authentication to bypass the normal PAM password prompt. + * + * OTHER mode handles PAM_PROMPT_ECHO_OFF with read_passphrase(prompt, 1) + * and outputs messages to stderr. This mode is used if pam_chauthtok() + *...

Hello sorry, for bothering you with this problem, but I ca't find solutions. I write small PAM module, and I've got the problem with conversation function with OpenSSH 3.5p1. When the message style is PAM_PROMPT_ECHO_ON, or PAM_PROMPT_ECHO_OFF everything is allright. But when I use PAM_TEXT_INFO, or PAM_ERROR_MSG, ssh prints nothing on the client side. Does anyone know the reason of this, and how can I print messages to the user. Kuba ---------------------------------------------------------- Jakub Jurkiewicz kura at icm.edu.pl k...

...a.mindrot.org/attachment.cgi?id=3388&action=edit PAM module that demonstrates the problem I've stumbled across an apparent issue with showing messages using PAM_TEXT_INFO style from a PAM module that blocks for (non-keyboard) user input. The same thing happens when using PAM_ERROR_MSG, but PAM_PROMPT_ECHO_OFF/ON work correctly. Attached is an example module that works properly with sudo, but shows both messages at the same time, at the end of the PAM stack execution, when trying to log into a server running sshd. Note that nothing is displayed from previous PAM modules either, i.e. if I put pam_echo m...

.../passdb-pam.c ti. okt. 14 12:02:28 2014 @@ -85,6 +85,8 @@ string = strdup(ctx->request->user); if (string == NULL) i_fatal_status(FATAL_OUTOFMEM, "Out of memory"); + if (strlen(string) == 0) + i_fatal_status(FATAL_OUTOFMEM, "NO USER?"); break; case PAM_PROMPT_ECHO_OFF: /* Assume we're asking for password */

...oftware; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. However, when I add a conversation "Press Enter to continue" of type PAM_PROMPT_ECHO_OFF just before the PAM module returns, I get this: $ ssh ascz at client.vm.scz-vm.net (ascz at client.vm.scz-vm.net) Please sign in to: https://sbs.scz-vm.net/weblogin/weblogin/fd0cc5e5-a0f4-4eb6-a14b-68196ed7110f Verification code: (ascz at client.vm.scz-vm.net) User admin has authenticated success...

...ately and I was to write more strict authorization modules for pam. One of it works asking for some kind of additional security string (for example pin from some kind of token). It is done by pam module, which asks calling application to do conversation for him: prompt_msg.msg_style = PAM_PROMPT_ECHO_OFF; prompt_msg.msg=strdup("Enter PIN:"); pmsg[i++] = &prompt_msg; retval = pam_get_item(pamh, PAM_CONV,(void *) &conv); if (retval != PAM_SUCCESS) return PAM_SYSTEM_ERR; retval = conv->conv (i,(CONST struct pam_message **)&am...

...O_ON: + ctxt = data; + if (n <= 0 || n > PAM_MAX_NUM_MSG) + return (PAM_CONV_ERR); + if ((*resp = calloc(n, sizeof **resp)) == NULL) + return (PAM_BUF_ERR); + for (i = 0; i < n; ++i) { + resp[i]->resp_retcode = 0; + resp[i]->resp = NULL; + switch (msg[i]->msg_style) { case PAM_PROMPT_ECHO_OFF: - context_pam2.num_expected++; + pam_send(ctxt, "p%s", msg[i]->msg); + resp[i]->resp = pam_receive(ctxt); + break; + case PAM_PROMPT_ECHO_ON: + pam_send(ctxt, "P%s", msg[i]->msg); + resp[i]->resp = pam_receive(ctxt); break; - case PAM_TEXT_INFO:...

Hi. One thing that people seem to want to do with PAM is to deny a login immediately without interacting but return a message to the user. (Some platforms implement, eg, /etc/nologin via PAM this way.) Currently, sshd will just deny the login and the user will not be told why. Attached it a patch that return a keyboard-interactive packet with the message in the "instruction"

https://bugzilla.mindrot.org/show_bug.cgi?id=1681 Summary: conversation function for passwd auth method assumes instead of fail Product: Portable OpenSSH Version: 5.3p1 Platform: All OS/Version: All Status: NEW Severity: major Priority: P2 Component: PAM support AssignedTo:

...data; + if (n <= 0 || n > PAM_MAX_NUM_MSG) + return (PAM_CONV_ERR); + if ((*resp = calloc(n, sizeof(struct pam_response))) == NULL) + return (PAM_BUF_ERR); + for (i = 0; i < n; ++i) { + resp[i]->resp_retcode = 0; + resp[i]->resp = NULL; + switch (msg[i]->msg_style) { case PAM_PROMPT_ECHO_OFF: - context_pam2.num_expected++; + sshpam_send(ctxt, "p%s", msg[i]->msg); + resp[i]->resp = sshpam_receive(ctxt); + break; + case PAM_PROMPT_ECHO_ON: + sshpam_send(ctxt, "P%s", msg[i]->msg); + resp[i]->resp = sshpam_receive(ctxt); break; - case PAM_T...

...57: error: `PAM_PERM_DENIED' undeclared (first use in this function) pam_ldap.c: At top level: pam_ldap.c:3208: error: syntax error before '*' token pam_ldap.c: In function `_get_authtok': pam_ldap.c:3212: error: storage size of 'msg' isn't known pam_ldap.c:3217: error: `PAM_PROMPT_ECHO_OFF' undeclared (first use in this function) pam_ldap.c:3218: error: `first' undeclared (first use in this function) pam_ldap.c:3221: error: `pamh' undeclared (first use in this function) pam_ldap.c:3221: error: `PAM_CONV' undeclared (first use in this function) pam_ldap.c:3221: warning...

-----BEGIN PGP SIGNED MESSAGE----- Hi, I''ve got several replies, thank you for them. Let me summarize: o Many people say there is a PAMified version of ssh available at ftp://ftp.replay.com/pub/crypto/redhat/SRPMS (the source) ftp://ftp.replay.com/pub/crypto/redhat/i386 (Intel binaries) (there are analogous paths for the other architectures). The packages are made by Jan

...O_ON: + ctxt = data; + if (n <= 0 || n > PAM_MAX_NUM_MSG) + return (PAM_CONV_ERR); + if ((*resp = calloc(n, sizeof **resp)) == NULL) + return (PAM_BUF_ERR); + for (i = 0; i < n; ++i) { + resp[i]->resp_retcode = 0; + resp[i]->resp = NULL; + switch (msg[i]->msg_style) { case PAM_PROMPT_ECHO_OFF: - context_pam2.num_expected++; + sshpam_send(ctxt, "p%s", msg[i]->msg); + resp[i]->resp = sshpam_receive(ctxt); + break; + case PAM_PROMPT_ECHO_ON: + sshpam_send(ctxt, "P%s", msg[i]->msg); + resp[i]->resp = sshpam_receive(ctxt); break; - case PAM_T...

...nv_msg */ @@ -61,6 +65,7 @@ { struct pam_response *reply; int count; + int dlen, plen, type; /* PAM will free this later */ reply = malloc(num_msg * sizeof(*reply)); @@ -70,13 +75,58 @@ for(count = 0; count < num_msg; count++) { switch (msg[count]->msg_style) { case PAM_PROMPT_ECHO_OFF: - if (pampasswd == NULL) { - free(reply); - return PAM_CONV_ERR; + if (current_auth_type==SSH_CMSG_AUTH_TIS && pampasswd==NULL) { + /* TIS */ + int prompt_len; +...

...d (first use in this function) nsswitch/pam_winbind.c:289: storage size of `msg' isn't known nsswitch/pam_winbind.c:295: `comment' undeclared (first use in this function) nsswitch/pam_winbind.c:297: `PAM_TEXT_INFO' undeclared (first use in this function) nsswitch/pam_winbind.c:305: `PAM_PROMPT_ECHO_OFF' undeclared (first use in this function) nsswitch/pam_winbind.c:306: `prompt1' undeclared (first use in this function) nsswitch/pam_winbind.c:309: `prompt2' undeclared (first use in this function) nsswitch/pam_winbind.c:325: arithmetic on pointer to an incomplete type nsswitch/pam_winbi...