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-rw-r--r--appl/su/su.c534
1 files changed, 0 insertions, 534 deletions
diff --git a/appl/su/su.c b/appl/su/su.c
deleted file mode 100644
index 0469e1b8acf3..000000000000
--- a/appl/su/su.c
+++ /dev/null
@@ -1,534 +0,0 @@
-/*
- * Copyright (c) 1999 - 2008 Kungliga Tekniska Högskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- * 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.
- *
- * 3. Neither the name of KTH nor the names of its contributors may be
- * used to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``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 KTH OR ITS CONTRIBUTORS 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 <config.h>
-
-RCSID("$Id$");
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <syslog.h>
-
-#ifdef HAVE_PATHS_H
-#include <paths.h>
-#endif
-
-#ifdef HAVE_SHADOW_H
-#include <shadow.h>
-#endif
-
-#include <pwd.h>
-#ifdef HAVE_CRYPT_H
-#include <crypt.h>
-#endif
-
-#include "crypto-headers.h"
-#ifdef KRB5
-#include <krb5.h>
-#endif
-#ifndef NO_AFS
-#include <kafs.h>
-#endif
-#include <err.h>
-#include <roken.h>
-#include <getarg.h>
-
-#include "supaths.h"
-
-#if !HAVE_DECL_ENVIRON
-extern char **environ;
-#endif
-
-int kerberos_flag = 1;
-int csh_f_flag;
-int full_login;
-int env_flag;
-char *kerberos_instance = "root";
-int help_flag;
-int version_flag;
-char *cmd;
-char tkfile[256];
-
-struct getargs args[] = {
- { "kerberos", 'K', arg_negative_flag, &kerberos_flag,
- "don't use kerberos", NULL },
- { NULL, 'f', arg_flag, &csh_f_flag,
- "don't read .cshrc", NULL },
- { "full", 'l', arg_flag, &full_login,
- "simulate full login", NULL },
- { NULL, 'm', arg_flag, &env_flag,
- "leave environment unmodified", NULL },
- { "instance", 'i', arg_string, &kerberos_instance,
- "root instance to use", NULL },
- { "command", 'c', arg_string, &cmd,
- "command to execute", NULL },
- { "help", 'h', arg_flag, &help_flag, NULL, NULL },
- { "version", 0, arg_flag, &version_flag, NULL, NULL },
-};
-
-
-static void
-usage (int ret)
-{
- arg_printusage (args,
- sizeof(args)/sizeof(*args),
- NULL,
- "[login [shell arguments]]");
- exit (ret);
-}
-
-static void
-free_info(struct passwd *p)
-{
- free (p->pw_name);
- free (p->pw_passwd);
- free (p->pw_dir);
- free (p->pw_shell);
- free (p);
-}
-
-static struct passwd*
-dup_info(const struct passwd *pwd)
-{
- struct passwd *info;
-
- info = malloc(sizeof(*info));
- if(info == NULL)
- return NULL;
- info->pw_name = strdup(pwd->pw_name);
- info->pw_passwd = strdup(pwd->pw_passwd);
- info->pw_uid = pwd->pw_uid;
- info->pw_gid = pwd->pw_gid;
- info->pw_dir = strdup(pwd->pw_dir);
- info->pw_shell = strdup(pwd->pw_shell);
- if(info->pw_name == NULL || info->pw_passwd == NULL ||
- info->pw_dir == NULL || info->pw_shell == NULL) {
- free_info (info);
- return NULL;
- }
- return info;
-}
-
-#ifdef KRB5
-static krb5_context context;
-static krb5_ccache ccache;
-
-static int
-krb5_verify(const struct passwd *login_info,
- const struct passwd *su_info,
- const char *instance)
-{
- krb5_error_code ret;
- krb5_principal p;
- krb5_realm *realms, *r;
- char *login_name = NULL;
- int user_ok = 0;
-
-#if defined(HAVE_GETLOGIN) && !defined(POSIX_GETLOGIN)
- login_name = getlogin();
-#endif
- ret = krb5_init_context (&context);
- if (ret) {
-#if 0
- warnx("krb5_init_context failed: %d", ret);
-#endif
- return 1;
- }
-
- ret = krb5_get_default_realms(context, &realms);
- if (ret)
- return 1;
-
- /* Check all local realms */
- for (r = realms; *r != NULL && !user_ok; r++) {
-
- if (login_name == NULL || strcmp (login_name, "root") == 0)
- login_name = login_info->pw_name;
- if (strcmp (su_info->pw_name, "root") == 0)
- ret = krb5_make_principal(context, &p, *r,
- login_name,
- instance,
- NULL);
- else
- ret = krb5_make_principal(context, &p, *r,
- su_info->pw_name,
- NULL);
- if (ret) {
- krb5_free_host_realm(context, realms);
- return 1;
- }
-
- /* if we are su-ing too root, check with krb5_kuserok */
- if (su_info->pw_uid == 0 && !krb5_kuserok(context, p, su_info->pw_name))
- continue;
-
- ret = krb5_cc_new_unique(context, krb5_cc_type_memory, NULL, &ccache);
- if(ret) {
- krb5_free_host_realm(context, realms);
- krb5_free_principal (context, p);
- return 1;
- }
- ret = krb5_verify_user(context, p, ccache, NULL, TRUE, NULL);
- krb5_free_principal (context, p);
- switch (ret) {
- case 0:
- user_ok = 1;
- break;
- case KRB5_LIBOS_PWDINTR :
- krb5_cc_destroy(context, ccache);
- break;
- case KRB5KRB_AP_ERR_BAD_INTEGRITY:
- case KRB5KRB_AP_ERR_MODIFIED:
- krb5_cc_destroy(context, ccache);
- krb5_warnx(context, "Password incorrect");
- break;
- default :
- krb5_cc_destroy(context, ccache);
- krb5_warn(context, ret, "krb5_verify_user");
- break;
- }
- }
- krb5_free_host_realm(context, realms);
- if (!user_ok)
- return 1;
- return 0;
-}
-
-static int
-krb5_start_session(void)
-{
- krb5_ccache ccache2;
- char *cc_name;
- int ret;
-
- ret = krb5_cc_new_unique(context, krb5_cc_type_file, NULL, &ccache2);
- if (ret) {
- krb5_cc_destroy(context, ccache);
- return 1;
- }
-
- ret = krb5_cc_copy_cache(context, ccache, ccache2);
- if (ret) {
- krb5_cc_destroy(context, ccache);
- krb5_cc_destroy(context, ccache2);
- return 1;
- }
-
- ret = asprintf(&cc_name, "%s:%s", krb5_cc_get_type(context, ccache2),
- krb5_cc_get_name(context, ccache2));
- if (ret == -1) {
- krb5_cc_destroy(context, ccache);
- krb5_cc_destroy(context, ccache2);
- errx(1, "malloc - out of memory");
- }
- esetenv("KRB5CCNAME", cc_name, 1);
-
-#ifndef NO_AFS
- /* convert creds? */
- if(k_hasafs()) {
- if (k_setpag() == 0)
- krb5_afslog(context, ccache2, NULL, NULL);
- }
-#endif
-
- krb5_cc_close(context, ccache2);
- krb5_cc_destroy(context, ccache);
- return 0;
-}
-#endif
-
-
-#define GROUP_MEMBER 0
-#define GROUP_MISSING 1
-#define GROUP_EMPTY 2
-#define GROUP_NOT_MEMBER 3
-
-static int
-group_member_p(const char *group, const char *user)
-{
- struct group *g;
- int i;
- g = getgrnam(group);
- if(g == NULL)
- return GROUP_MISSING;
- if(g->gr_mem[0] == NULL)
- return GROUP_EMPTY;
- for(i = 0; g->gr_mem[i] != NULL; i++)
- if(strcmp(user, g->gr_mem[i]) == 0)
- return GROUP_MEMBER;
- return GROUP_NOT_MEMBER;
-}
-
-static int
-verify_unix(struct passwd *login, struct passwd *su)
-{
- char prompt[128];
- char pw_buf[1024];
- char *pw;
- int r;
- if(su->pw_passwd != NULL && *su->pw_passwd != '\0') {
- snprintf(prompt, sizeof(prompt), "%s's password: ", su->pw_name);
- r = UI_UTIL_read_pw_string(pw_buf, sizeof(pw_buf), prompt, 0);
- if(r != 0)
- exit(0);
- pw = crypt(pw_buf, su->pw_passwd);
- memset_s(pw_buf, sizeof(pw_buf), 0, sizeof(pw_buf));
- if(strcmp(pw, su->pw_passwd) != 0) {
- syslog (LOG_ERR | LOG_AUTH, "%s to %s: incorrect password",
- login->pw_name, su->pw_name);
- return 1;
- }
- }
- /* if su:ing to root, check membership of group wheel or root; if
- that group doesn't exist, or is empty, allow anyone to su
- root */
- if(su->pw_uid == 0) {
-#ifndef ROOT_GROUP
-#define ROOT_GROUP "wheel"
-#endif
- int gs = group_member_p(ROOT_GROUP, login->pw_name);
- if(gs == GROUP_NOT_MEMBER) {
- syslog (LOG_ERR | LOG_AUTH, "%s to %s: not in group %s",
- login->pw_name, su->pw_name, ROOT_GROUP);
- return 1;
- }
- return 0;
- }
- return 0;
-}
-
-int
-main(int argc, char **argv)
-{
- int i, optidx = 0;
- char *su_user;
- struct passwd *su_info;
- struct passwd *login_info;
-
- struct passwd *pwd;
-
- char *shell;
-
- int ok = 0;
-
- setprogname (argv[0]);
-
- if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
- usage(1);
-
- for (i=0; i < optidx; i++)
- if (strcmp(argv[i], "-") == 0) {
- full_login = 1;
- break;
- }
-
- if(help_flag)
- usage(0);
- if(version_flag) {
- print_version(NULL);
- exit(0);
- }
- if(optidx >= argc)
- su_user = "root";
- else
- su_user = argv[optidx++];
-
- if (!issuid() && getuid() != 0)
- warnx("Not setuid and you are not root, expect this to fail");
-
- pwd = k_getpwnam(su_user);
- if(pwd == NULL)
- errx (1, "unknown login %s", su_user);
- if (pwd->pw_uid == 0 && strcmp ("root", su_user) != 0) {
- syslog (LOG_ALERT, "NIS attack, user %s has uid 0", su_user);
- errx (1, "unknown login %s", su_user);
- }
- su_info = dup_info(pwd);
- if (su_info == NULL)
- errx (1, "malloc: out of memory");
-
- pwd = getpwuid(getuid());
- if(pwd == NULL)
- errx(1, "who are you?");
- login_info = dup_info(pwd);
- if (login_info == NULL)
- errx (1, "malloc: out of memory");
- if(env_flag)
- shell = login_info->pw_shell;
- else
- shell = su_info->pw_shell;
- if(shell == NULL || *shell == '\0')
- shell = _PATH_BSHELL;
-
-
-#ifdef KRB5
- if(kerberos_flag && ok == 0 &&
- krb5_verify(login_info, su_info, kerberos_instance) == 0)
- ok = 5;
-#endif
-
- if(ok == 0 && login_info->pw_uid && verify_unix(login_info, su_info) != 0) {
- printf("Sorry!\n");
- exit(1);
- }
-
-#ifdef HAVE_GETSPNAM
- { struct spwd *sp;
- long today;
-
- sp = getspnam(su_info->pw_name);
- if (sp != NULL) {
- today = time(0)/(24L * 60 * 60);
- if (sp->sp_expire > 0) {
- if (today >= sp->sp_expire) {
- if (login_info->pw_uid)
- errx(1,"Your account has expired.");
- else
- printf("Your account has expired.");
- }
- else if (sp->sp_expire - today < 14)
- printf("Your account will expire in %d days.\n",
- (int)(sp->sp_expire - today));
- }
- if (sp->sp_max > 0) {
- if (today >= sp->sp_lstchg + sp->sp_max) {
- if (login_info->pw_uid)
- errx(1,"Your password has expired. Choose a new one.");
- else
- printf("Your password has expired. Choose a new one.");
- }
- else if (today >= sp->sp_lstchg + sp->sp_max - sp->sp_warn)
- printf("Your account will expire in %d days.\n",
- (int)(sp->sp_lstchg + sp->sp_max -today));
- }
- }
- }
-#endif
- {
- char *tty = ttyname (STDERR_FILENO);
- if (tty)
- syslog (LOG_NOTICE | LOG_AUTH, "%s to %s on %s",
- login_info->pw_name, su_info->pw_name, tty);
- else
- syslog (LOG_NOTICE | LOG_AUTH, "%s to %s",
- login_info->pw_name, su_info->pw_name);
- }
-
-
- if(!env_flag) {
- if(full_login) {
- char *t = getenv ("TERM");
- char **newenv = NULL;
- int j;
-
- i = read_environment(_PATH_ETC_ENVIRONMENT, &newenv);
-
- environ = malloc ((10 + i) * sizeof (char *));
- if (environ == NULL)
- err (1, "malloc");
- environ[0] = NULL;
-
- for (j = 0; j < i; j++) {
- char *p = strchr(newenv[j], '=');
- if (p == NULL)
- errx(1, "enviroment '%s' missing '='", newenv[j]);
- *p++ = 0;
- esetenv (newenv[j], p, 1);
- }
- free(newenv);
-
- esetenv ("PATH", _PATH_DEFPATH, 1);
- if (t)
- esetenv ("TERM", t, 1);
- if (chdir (su_info->pw_dir) < 0)
- errx (1, "no directory");
- }
- if (full_login || su_info->pw_uid)
- esetenv ("USER", su_info->pw_name, 1);
- esetenv("HOME", su_info->pw_dir, 1);
- esetenv("SHELL", shell, 1);
- }
-
- {
- char **new_argv;
- char *p;
-
- p = strrchr(shell, '/');
- if(p)
- p++;
- else
- p = shell;
-
- if (strcmp(p, "csh") != 0)
- csh_f_flag = 0;
-
- new_argv = malloc(((cmd ? 2 : 0) + 1 + argc - optidx + 1 + csh_f_flag)
- * sizeof(*new_argv));
- if (new_argv == NULL)
- err (1, "malloc");
- i = 0;
- if(full_login) {
- if (asprintf(&new_argv[i++], "-%s", p) == -1)
- errx (1, "malloc");
- } else
- new_argv[i++] = p;
- if (cmd) {
- new_argv[i++] = "-c";
- new_argv[i++] = cmd;
- }
-
- if (csh_f_flag)
- new_argv[i++] = "-f";
-
- for (argv += optidx; *argv; ++argv)
- new_argv[i++] = *argv;
- new_argv[i] = NULL;
-
- if(setgid(su_info->pw_gid) < 0)
- err(1, "setgid");
- if (initgroups (su_info->pw_name, su_info->pw_gid) < 0)
- err (1, "initgroups");
- if(setuid(su_info->pw_uid) < 0
- || (su_info->pw_uid != 0 && setuid(0) == 0))
- err(1, "setuid");
-
-#ifdef KRB5
- if (ok == 5)
- krb5_start_session();
-#endif
- execve(shell, new_argv, environ);
- }
-
- exit(1);
-}
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