/* * Copyright (c) 1996, 1998-2005 Todd C. Miller <Todd.Miller@courtesan.com> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * 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. * * Sponsored in part by the Defense Advanced Research Projects * Agency (DARPA) and Air Force Research Laboratory, Air Force * Materiel Command, USAF, under agreement number F39502-99-1-0512. */ /* * The code below basically comes from the examples supplied on * the OSF DCE 1.0.3 manpages for the sec_login routines, with * enough additional polishing to make the routine work with the * rest of sudo. * * This code is known to work on HP 700 and 800 series systems * running HP-UX 9.X and 10.X, with either HP's version 1.2.1 of DCE. * (aka, OSF DCE 1.0.3) or with HP's version 1.4 of DCE (aka, OSF * DCE 1.1). */ #include <config.h> #include <sys/types.h> #include <sys/param.h> #include <stdio.h> #ifdef STDC_HEADERS # include <stdlib.h> # include <stddef.h> #else # ifdef HAVE_STDLIB_H # include <stdlib.h> # endif #endif /* STDC_HEADERS */ #ifdef HAVE_STRING_H # include <string.h> #else # ifdef HAVE_STRINGS_H # include <strings.h> # endif #endif /* HAVE_STRING_H */ #ifdef HAVE_UNISTD_H # include <unistd.h> #endif /* HAVE_UNISTD_H */ #include <pwd.h> #include <dce/rpc.h> #include <dce/sec_login.h> #include <dce/dce_error.h> /* required to call dce_error_inq_text routine */ #include "sudo.h" #include "sudo_auth.h" #ifndef lint __unused static const char rcsid[] = "$Sudo: dce.c,v 1.14 2005/02/12 22:56:07 millert Exp $"; #endif /* lint */ static int check_dce_status __P((error_status_t, char *)); int dce_verify(pw, plain_pw, auth) struct passwd *pw; char *plain_pw; sudo_auth *auth; { struct passwd temp_pw; sec_passwd_rec_t password_rec; sec_login_handle_t login_context; boolean32 reset_passwd; sec_login_auth_src_t auth_src; error_status_t status; /* * Create the local context of the DCE principal necessary * to perform authenticated network operations. The network * identity set up by this operation cannot be used until it * is validated via sec_login_validate_identity(). */ if (sec_login_setup_identity((unsigned_char_p_t) pw->pw_name, sec_login_no_flags, &login_context, &status)) { if (check_dce_status(status, "sec_login_setup_identity(1):")) return(AUTH_FAILURE); password_rec.key.key_type = sec_passwd_plain; password_rec.key.tagged_union.plain = (idl_char *) plain_pw; password_rec.pepper = NULL; password_rec.version_number = sec_passwd_c_version_none; /* Validate the login context with the password */ if (sec_login_validate_identity(login_context, &password_rec, &reset_passwd, &auth_src, &status)) { if (check_dce_status(status, "sec_login_validate_identity(1):")) return(AUTH_FAILURE); /* * Certify that the DCE Security Server used to set * up and validate a login context is legitimate. Makes * sure that we didn't get spoofed by another DCE server. */ if (!sec_login_certify_identity(login_context, &status)) { (void) fprintf(stderr, "Whoa! Bogus authentication server!\n"); (void) check_dce_status(status,"sec_login_certify_identity(1):"); return(AUTH_FAILURE); } if (check_dce_status(status, "sec_login_certify_identity(2):")) return(AUTH_FAILURE); /* * Sets the network credentials to those specified * by the now validated login context. */ sec_login_set_context(login_context, &status); if (check_dce_status(status, "sec_login_set_context:")) return(AUTH_FAILURE); /* * Oops, your credentials were no good. Possibly * caused by clock times out of adjustment between * DCE client and DCE security server... */ if (auth_src != sec_login_auth_src_network) { (void) fprintf(stderr, "You have no network credentials.\n"); return(AUTH_FAILURE); } /* Check if the password has aged and is thus no good */ if (reset_passwd) { (void) fprintf(stderr, "Your DCE password needs resetting.\n"); return(AUTH_FAILURE); } /* * We should be a valid user by this point. Pull the * user's password structure from the DCE security * server just to make sure. If we get it with no * problems, then we really are legitimate... */ sec_login_get_pwent(login_context, (sec_login_passwd_t) &temp_pw, &status); if (check_dce_status(status, "sec_login_get_pwent:")) return(AUTH_FAILURE); /* * If we get to here, then the pwent above properly fetched * the password structure from the DCE registry, so the user * must be valid. We don't really care what the user's * registry password is, just that the user could be * validated. In fact, if we tried to compare the local * password to the DCE entry at this point, the operation * would fail if the hidden password feature is turned on, * because the password field would contain an asterisk. * Also go ahead and destroy the user's DCE login context * before we leave here (and don't bother checking the * status), in order to clean up credentials files in * /opt/dcelocal/var/security/creds. By doing this, we are * assuming that the user will not need DCE authentication * later in the program, only local authentication. If this * is not true, then the login_context will have to be * returned to the calling program, and the context purged * somewhere later in the program. */ sec_login_purge_context(&login_context, &status); return(AUTH_SUCCESS); } else { if(check_dce_status(status, "sec_login_validate_identity(2):")) return(AUTH_FAILURE); sec_login_purge_context(&login_context, &status); if(check_dce_status(status, "sec_login_purge_context:")) return(AUTH_FAILURE); } } (void) check_dce_status(status, "sec_login_setup_identity(2):"); return(AUTH_FAILURE); } /* Returns 0 for DCE "ok" status, 1 otherwise */ static int check_dce_status(input_status, comment) error_status_t input_status; char *comment; { int error_stat; unsigned char error_string[dce_c_error_string_len]; if (input_status == rpc_s_ok) return(0); dce_error_inq_text(input_status, error_string, &error_stat); (void) fprintf(stderr, "%s %s\n", comment, error_string); return(1); }