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From 923dc05d68031a217684aba87acdadc7f711c88a Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
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Date: Thu, 10 Mar 2011 15:16:04 +0100
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Subject: [PATCH] Set PAM_TTY and PAM_RHOST on PAM authentication
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When loging to server, PAM can make decision on client network address, so set
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it appropriately. Also some modules require non-empy console name, thus set
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PAM_TTY to cvs PAM service name (`cvs').
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PAM failure is reported back to client.
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This code is back-ported from from upstream developemt tree (r1.489).
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`peer' and `len' types fixed to cover any address family.
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---
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src/server.c | 47 ++++++++++++++++++++++++++++++++++++++++++++++-
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1 files changed, 46 insertions(+), 1 deletions(-)
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diff --git a/src/server.c b/src/server.c
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index 0505ab9..bc6f0d0 100644
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--- a/src/server.c
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+++ b/src/server.c
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@@ -5799,18 +5799,61 @@ error 0 %s: no such user\n", username);
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#if PAM_SUPPORT
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pam_handle_t *pamh = NULL;
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struct pam_conv conv;
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+ char *pam_stage = "start";
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+ struct sockaddr_storage peer;
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+ socklen_t len;
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+ char host[NI_MAXHOST];
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int retval;
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+ /* get the client's ip address */
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+ len = sizeof (peer);
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+ if (getpeername (STDIN_FILENO, (struct sockaddr *)&peer, &len) < 0)
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+ {
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+ printf ("E Fatal error, aborting.\n\
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+error %s getpeername failed\n", strerror (errno));
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+ exit (EXIT_FAILURE);
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+ }
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+
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+ /* convert the ip address to text */
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+ if (getnameinfo((struct sockaddr *)&peer, len, host, NI_MAXHOST,
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+ NULL, 0, NI_NUMERICHOST) < 0)
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+ {
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+ printf ("E Fatal error, aborting.\n\
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+error %s getnameinfo failed\n", strerror (errno));
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+ exit (EXIT_FAILURE);
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+ }
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+
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conv.conv = silent_conv;
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conv.appdata_ptr = password;
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- retval = pam_start("cvs", username, &conv, &pamh);
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+#define PAM_SERVICE_NAME "cvs"
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+ retval = pam_start(PAM_SERVICE_NAME, username, &conv, &pamh);
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+
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+ /* sets a dummy tty name which pam modules can check for */
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+ if (retval == PAM_SUCCESS)
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+ {
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+ pam_stage = "set dummy tty";
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+ retval = pam_set_item (pamh, PAM_TTY, PAM_SERVICE_NAME);
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+ }
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+#undef PAM_SERVICE_NAME
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+
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+ if (retval == PAM_SUCCESS)
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+ {
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+ pam_stage = "set remote host ip";
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+ retval = pam_set_item (pamh, PAM_RHOST, host);
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+ }
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if (retval == PAM_SUCCESS)
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+ {
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+ pam_stage = "authenticate";
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retval = pam_authenticate(pamh, 0); /* is user really user? */
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+ }
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if (retval == PAM_SUCCESS)
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+ {
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+ pam_stage = "account";
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retval = pam_acct_mgmt(pamh, 0); /* permitted access? */
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+ }
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/* This is where we have been authorized or not. */
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@@ -5818,6 +5861,8 @@ error 0 %s: no such user\n", username);
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host_user = xstrdup (username);
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} else {
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host_user = NULL;
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+ printf ("E PAM %s error: %s\n",
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+ pam_stage, pam_strerror (pamh, retval));
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}
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if (pam_end(pamh,retval) != PAM_SUCCESS) { /* close Linux-PAM */
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--
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1.7.4
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