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-rw-r--r--crypto/openssh/auth-pam.c455
1 files changed, 0 insertions, 455 deletions
diff --git a/crypto/openssh/auth-pam.c b/crypto/openssh/auth-pam.c
deleted file mode 100644
index fe9570f92a100..0000000000000
--- a/crypto/openssh/auth-pam.c
+++ /dev/null
@@ -1,455 +0,0 @@
-/*
- * Copyright (c) 2000 Damien Miller. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "includes.h"
-
-#ifdef USE_PAM
-#include "xmalloc.h"
-#include "log.h"
-#include "auth.h"
-#include "auth-options.h"
-#include "auth-pam.h"
-#include "servconf.h"
-#include "canohost.h"
-#include "readpass.h"
-
-extern char *__progname;
-
-extern int use_privsep;
-
-RCSID("$Id: auth-pam.c,v 1.55 2003/01/22 04:42:26 djm Exp $");
-
-#define NEW_AUTHTOK_MSG \
- "Warning: Your password has expired, please change it now."
-#define NEW_AUTHTOK_MSG_PRIVSEP \
- "Your password has expired, the session cannot proceed."
-
-static int do_pam_conversation(int num_msg, const struct pam_message **msg,
- struct pam_response **resp, void *appdata_ptr);
-
-/* module-local variables */
-static struct pam_conv conv = {
- (int (*)())do_pam_conversation,
- NULL
-};
-static char *__pam_msg = NULL;
-static pam_handle_t *__pamh = NULL;
-static const char *__pampasswd = NULL;
-
-/* states for do_pam_conversation() */
-enum { INITIAL_LOGIN, OTHER } pamstate = INITIAL_LOGIN;
-/* remember whether pam_acct_mgmt() returned PAM_NEW_AUTHTOK_REQD */
-static int password_change_required = 0;
-/* remember whether the last pam_authenticate() succeeded or not */
-static int was_authenticated = 0;
-
-/* Remember what has been initialised */
-static int session_opened = 0;
-static int creds_set = 0;
-
-/* accessor which allows us to switch conversation structs according to
- * the authentication method being used */
-void do_pam_set_conv(struct pam_conv *conv)
-{
- pam_set_item(__pamh, PAM_CONV, conv);
-}
-
-/* start an authentication run */
-int do_pam_authenticate(int flags)
-{
- int retval = pam_authenticate(__pamh, flags);
- was_authenticated = (retval == PAM_SUCCESS);
- return retval;
-}
-
-/*
- * 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 into __pam_msg. This is used during initial
- * authentication to bypass the normal PAM password prompt.
- *
- * OTHER mode handles PAM_PROMPT_ECHO_OFF with read_passphrase()
- * and outputs messages to stderr. This mode is used if pam_chauthtok()
- * is called to update expired passwords.
- */
-static int do_pam_conversation(int num_msg, const struct pam_message **msg,
- struct pam_response **resp, void *appdata_ptr)
-{
- struct pam_response *reply;
- int count;
- char buf[1024];
-
- /* PAM will free this later */
- reply = xmalloc(num_msg * sizeof(*reply));
-
- for (count = 0; count < num_msg; count++) {
- if (pamstate == INITIAL_LOGIN) {
- /*
- * We can't use stdio yet, queue messages for
- * printing later
- */
- switch(PAM_MSG_MEMBER(msg, count, msg_style)) {
- case PAM_PROMPT_ECHO_ON:
- xfree(reply);
- return PAM_CONV_ERR;
- case PAM_PROMPT_ECHO_OFF:
- if (__pampasswd == NULL) {
- xfree(reply);
- return PAM_CONV_ERR;
- }
- reply[count].resp = xstrdup(__pampasswd);
- reply[count].resp_retcode = PAM_SUCCESS;
- break;
- case PAM_ERROR_MSG:
- case PAM_TEXT_INFO:
- if (PAM_MSG_MEMBER(msg, count, msg) != NULL) {
- message_cat(&__pam_msg,
- PAM_MSG_MEMBER(msg, count, msg));
- }
- reply[count].resp = xstrdup("");
- reply[count].resp_retcode = PAM_SUCCESS;
- break;
- default:
- xfree(reply);
- return PAM_CONV_ERR;
- }
- } else {
- /*
- * stdio is connected, so interact directly
- */
- switch(PAM_MSG_MEMBER(msg, count, msg_style)) {
- case PAM_PROMPT_ECHO_ON:
- fputs(PAM_MSG_MEMBER(msg, count, msg), stderr);
- fgets(buf, sizeof(buf), stdin);
- reply[count].resp = xstrdup(buf);
- reply[count].resp_retcode = PAM_SUCCESS;
- break;
- case PAM_PROMPT_ECHO_OFF:
- reply[count].resp =
- read_passphrase(PAM_MSG_MEMBER(msg, count,
- msg), RP_ALLOW_STDIN);
- reply[count].resp_retcode = PAM_SUCCESS;
- break;
- case PAM_ERROR_MSG:
- case PAM_TEXT_INFO:
- if (PAM_MSG_MEMBER(msg, count, msg) != NULL)
- fprintf(stderr, "%s\n",
- PAM_MSG_MEMBER(msg, count, msg));
- reply[count].resp = xstrdup("");
- reply[count].resp_retcode = PAM_SUCCESS;
- break;
- default:
- xfree(reply);
- return PAM_CONV_ERR;
- }
- }
- }
-
- *resp = reply;
-
- return PAM_SUCCESS;
-}
-
-/* Called at exit to cleanly shutdown PAM */
-void do_pam_cleanup_proc(void *context)
-{
- int pam_retval = PAM_SUCCESS;
-
- if (__pamh && session_opened) {
- pam_retval = pam_close_session(__pamh, 0);
- if (pam_retval != PAM_SUCCESS)
- log("Cannot close PAM session[%d]: %.200s",
- pam_retval, PAM_STRERROR(__pamh, pam_retval));
- }
-
- if (__pamh && creds_set) {
- pam_retval = pam_setcred(__pamh, PAM_DELETE_CRED);
- if (pam_retval != PAM_SUCCESS)
- debug("Cannot delete credentials[%d]: %.200s",
- pam_retval, PAM_STRERROR(__pamh, pam_retval));
- }
-
- if (__pamh) {
- pam_retval = pam_end(__pamh, pam_retval);
- if (pam_retval != PAM_SUCCESS)
- log("Cannot release PAM authentication[%d]: %.200s",
- pam_retval, PAM_STRERROR(__pamh, pam_retval));
- }
-}
-
-/* Attempt password authentation using PAM */
-int auth_pam_password(Authctxt *authctxt, const char *password)
-{
- extern ServerOptions options;
- int pam_retval;
- struct passwd *pw = authctxt->pw;
-
- do_pam_set_conv(&conv);
-
- __pampasswd = password;
-
- pamstate = INITIAL_LOGIN;
- pam_retval = do_pam_authenticate(
- options.permit_empty_passwd == 0 ? PAM_DISALLOW_NULL_AUTHTOK : 0);
- if (pam_retval == PAM_SUCCESS) {
- debug("PAM Password authentication accepted for "
- "user \"%.100s\"", pw->pw_name);
- return 1;
- } else {
- debug("PAM Password authentication for \"%.100s\" "
- "failed[%d]: %s", pw->pw_name, pam_retval,
- PAM_STRERROR(__pamh, pam_retval));
- return 0;
- }
-}
-
-/* Do account management using PAM */
-int do_pam_account(char *username, char *remote_user)
-{
- int pam_retval;
-
- do_pam_set_conv(&conv);
-
- if (remote_user) {
- debug("PAM setting ruser to \"%.200s\"", remote_user);
- pam_retval = pam_set_item(__pamh, PAM_RUSER, remote_user);
- if (pam_retval != PAM_SUCCESS)
- fatal("PAM set ruser failed[%d]: %.200s", pam_retval,
- PAM_STRERROR(__pamh, pam_retval));
- }
-
- pam_retval = pam_acct_mgmt(__pamh, 0);
- debug2("pam_acct_mgmt() = %d", pam_retval);
- switch (pam_retval) {
- case PAM_SUCCESS:
- /* This is what we want */
- break;
-#if 0
- case PAM_NEW_AUTHTOK_REQD:
- message_cat(&__pam_msg, use_privsep ?
- NEW_AUTHTOK_MSG_PRIVSEP : NEW_AUTHTOK_MSG);
- /* flag that password change is necessary */
- password_change_required = 1;
- /* disallow other functionality for now */
- no_port_forwarding_flag |= 2;
- no_agent_forwarding_flag |= 2;
- no_x11_forwarding_flag |= 2;
- break;
-#endif
- default:
- log("PAM rejected by account configuration[%d]: "
- "%.200s", pam_retval, PAM_STRERROR(__pamh,
- pam_retval));
- return(0);
- }
-
- return(1);
-}
-
-/* Do PAM-specific session initialisation */
-void do_pam_session(char *username, const char *ttyname)
-{
- int pam_retval;
-
- do_pam_set_conv(&conv);
-
- if (ttyname != NULL) {
- debug("PAM setting tty to \"%.200s\"", ttyname);
- pam_retval = pam_set_item(__pamh, PAM_TTY, ttyname);
- if (pam_retval != PAM_SUCCESS)
- fatal("PAM set tty failed[%d]: %.200s",
- pam_retval, PAM_STRERROR(__pamh, pam_retval));
- }
-
- pam_retval = pam_open_session(__pamh, 0);
- if (pam_retval != PAM_SUCCESS)
- fatal("PAM session setup failed[%d]: %.200s",
- pam_retval, PAM_STRERROR(__pamh, pam_retval));
-
- session_opened = 1;
-}
-
-/* Set PAM credentials */
-void do_pam_setcred(int init)
-{
- int pam_retval;
-
- if (__pamh == NULL)
- return;
-
- do_pam_set_conv(&conv);
-
- debug("PAM establishing creds");
- pam_retval = pam_setcred(__pamh,
- init ? PAM_ESTABLISH_CRED : PAM_REINITIALIZE_CRED);
- if (pam_retval != PAM_SUCCESS) {
- if (was_authenticated)
- fatal("PAM setcred failed[%d]: %.200s",
- pam_retval, PAM_STRERROR(__pamh, pam_retval));
- else
- debug("PAM setcred failed[%d]: %.200s",
- pam_retval, PAM_STRERROR(__pamh, pam_retval));
- } else
- creds_set = 1;
-}
-
-/* accessor function for file scope static variable */
-int is_pam_password_change_required(void)
-{
- return password_change_required;
-}
-
-/*
- * Have user change authentication token if pam_acct_mgmt() indicated
- * it was expired. This needs to be called after an interactive
- * session is established and the user's pty is connected to
- * stdin/stdout/stderr.
- */
-void do_pam_chauthtok(void)
-{
- int pam_retval;
-
- do_pam_set_conv(&conv);
-
- if (password_change_required) {
- if (use_privsep)
- fatal("Password changing is currently unsupported"
- " with privilege separation");
- pamstate = OTHER;
- pam_retval = pam_chauthtok(__pamh, PAM_CHANGE_EXPIRED_AUTHTOK);
- if (pam_retval != PAM_SUCCESS)
- fatal("PAM pam_chauthtok failed[%d]: %.200s",
- pam_retval, PAM_STRERROR(__pamh, pam_retval));
-#if 0
- /* XXX: This would need to be done in the parent process,
- * but there's currently no way to pass such request. */
- no_port_forwarding_flag &= ~2;
- no_agent_forwarding_flag &= ~2;
- no_x11_forwarding_flag &= ~2;
- if (!no_port_forwarding_flag && options.allow_tcp_forwarding)
- channel_permit_all_opens();
-#endif
- }
-}
-
-/* Cleanly shutdown PAM */
-void finish_pam(void)
-{
- do_pam_cleanup_proc(NULL);
- fatal_remove_cleanup(&do_pam_cleanup_proc, NULL);
-}
-
-/* Start PAM authentication for specified account */
-void start_pam(const char *user)
-{
- int pam_retval;
- extern ServerOptions options;
- extern u_int utmp_len;
- const char *rhost;
-
- debug("Starting up PAM with username \"%.200s\"", user);
-
- pam_retval = pam_start(SSHD_PAM_SERVICE, user, &conv, &__pamh);
-
- if (pam_retval != PAM_SUCCESS)
- fatal("PAM initialisation failed[%d]: %.200s",
- pam_retval, PAM_STRERROR(__pamh, pam_retval));
-
- rhost = get_remote_name_or_ip(utmp_len, options.verify_reverse_mapping);
- debug("PAM setting rhost to \"%.200s\"", rhost);
-
- pam_retval = pam_set_item(__pamh, PAM_RHOST, rhost);
- if (pam_retval != PAM_SUCCESS)
- fatal("PAM set rhost failed[%d]: %.200s", pam_retval,
- PAM_STRERROR(__pamh, pam_retval));
-#ifdef PAM_TTY_KLUDGE
- /*
- * Some PAM modules (e.g. pam_time) require a TTY to operate,
- * and will fail in various stupid ways if they don't get one.
- * sshd doesn't set the tty until too late in the auth process and may
- * not even need one (for tty-less connections)
- * Kludge: Set a fake PAM_TTY
- */
- pam_retval = pam_set_item(__pamh, PAM_TTY, "NODEVssh");
- if (pam_retval != PAM_SUCCESS)
- fatal("PAM set tty failed[%d]: %.200s",
- pam_retval, PAM_STRERROR(__pamh, pam_retval));
-#endif /* PAM_TTY_KLUDGE */
-
- fatal_add_cleanup(&do_pam_cleanup_proc, NULL);
-}
-
-/* Return list of PAM environment strings */
-char **fetch_pam_environment(void)
-{
-#ifdef HAVE_PAM_GETENVLIST
- return(pam_getenvlist(__pamh));
-#else /* HAVE_PAM_GETENVLIST */
- return(NULL);
-#endif /* HAVE_PAM_GETENVLIST */
-}
-
-void free_pam_environment(char **env)
-{
- int i;
-
- if (env != NULL) {
- for (i = 0; env[i] != NULL; i++)
- xfree(env[i]);
- }
-}
-
-/* Print any messages that have been generated during authentication */
-/* or account checking to stderr */
-void print_pam_messages(void)
-{
- if (__pam_msg != NULL)
- fputs(__pam_msg, stderr);
-}
-
-/* Append a message to buffer */
-void message_cat(char **p, const char *a)
-{
- char *cp;
- size_t new_len;
-
- new_len = strlen(a);
-
- if (*p) {
- size_t len = strlen(*p);
-
- *p = xrealloc(*p, new_len + len + 2);
- cp = *p + len;
- } else
- *p = cp = xmalloc(new_len + 2);
-
- memcpy(cp, a, new_len);
- cp[new_len] = '\n';
- cp[new_len + 1] = '\0';
-}
-
-#endif /* USE_PAM */