Rework source layout in preparation for modular sudo.
This commit is contained in:
Todd C. Miller
202
plugins/sudoers/auth/dce.c
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202
plugins/sudoers/auth/dce.c
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/*
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* Copyright (c) 1996, 1998-2005 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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/*
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* The code below basically comes from the examples supplied on
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* the OSF DCE 1.0.3 manpages for the sec_login routines, with
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* enough additional polishing to make the routine work with the
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* rest of sudo.
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*
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* This code is known to work on HP 700 and 800 series systems
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* running HP-UX 9.X and 10.X, with either HP's version 1.2.1 of DCE.
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* (aka, OSF DCE 1.0.3) or with HP's version 1.4 of DCE (aka, OSF
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* DCE 1.1).
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <stdio.h>
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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# include <stddef.h>
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#else
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# ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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# endif
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#endif /* STDC_HEADERS */
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#ifdef HAVE_STRING_H
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# include <string.h>
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#else
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# ifdef HAVE_STRINGS_H
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# include <strings.h>
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# endif
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#include <pwd.h>
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#include <dce/rpc.h>
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#include <dce/sec_login.h>
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#include <dce/dce_error.h> /* required to call dce_error_inq_text routine */
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#include "sudo.h"
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#include "sudo_auth.h"
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static int check_dce_status __P((error_status_t, char *));
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int
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dce_verify(pw, plain_pw, auth)
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struct passwd *pw;
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char *plain_pw;
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sudo_auth *auth;
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{
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struct passwd temp_pw;
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sec_passwd_rec_t password_rec;
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sec_login_handle_t login_context;
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boolean32 reset_passwd;
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sec_login_auth_src_t auth_src;
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error_status_t status;
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/*
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* Create the local context of the DCE principal necessary
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* to perform authenticated network operations. The network
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* identity set up by this operation cannot be used until it
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* is validated via sec_login_validate_identity().
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*/
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if (sec_login_setup_identity((unsigned_char_p_t) pw->pw_name,
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sec_login_no_flags, &login_context, &status)) {
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if (check_dce_status(status, "sec_login_setup_identity(1):"))
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return(AUTH_FAILURE);
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password_rec.key.key_type = sec_passwd_plain;
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password_rec.key.tagged_union.plain = (idl_char *) plain_pw;
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password_rec.pepper = NULL;
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password_rec.version_number = sec_passwd_c_version_none;
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/* Validate the login context with the password */
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if (sec_login_validate_identity(login_context, &password_rec,
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&reset_passwd, &auth_src, &status)) {
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if (check_dce_status(status, "sec_login_validate_identity(1):"))
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return(AUTH_FAILURE);
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/*
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* Certify that the DCE Security Server used to set
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* up and validate a login context is legitimate. Makes
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* sure that we didn't get spoofed by another DCE server.
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*/
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if (!sec_login_certify_identity(login_context, &status)) {
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(void) fprintf(stderr, "Whoa! Bogus authentication server!\n");
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(void) check_dce_status(status,"sec_login_certify_identity(1):");
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return(AUTH_FAILURE);
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}
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if (check_dce_status(status, "sec_login_certify_identity(2):"))
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return(AUTH_FAILURE);
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/*
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* Sets the network credentials to those specified
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* by the now validated login context.
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*/
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sec_login_set_context(login_context, &status);
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if (check_dce_status(status, "sec_login_set_context:"))
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return(AUTH_FAILURE);
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/*
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* Oops, your credentials were no good. Possibly
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* caused by clock times out of adjustment between
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* DCE client and DCE security server...
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*/
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if (auth_src != sec_login_auth_src_network) {
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(void) fprintf(stderr,
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"You have no network credentials.\n");
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return(AUTH_FAILURE);
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}
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/* Check if the password has aged and is thus no good */
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if (reset_passwd) {
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(void) fprintf(stderr,
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"Your DCE password needs resetting.\n");
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return(AUTH_FAILURE);
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}
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/*
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* We should be a valid user by this point. Pull the
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* user's password structure from the DCE security
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* server just to make sure. If we get it with no
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* problems, then we really are legitimate...
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*/
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sec_login_get_pwent(login_context, (sec_login_passwd_t) &temp_pw,
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&status);
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if (check_dce_status(status, "sec_login_get_pwent:"))
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return(AUTH_FAILURE);
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/*
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* If we get to here, then the pwent above properly fetched
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* the password structure from the DCE registry, so the user
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* must be valid. We don't really care what the user's
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* registry password is, just that the user could be
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* validated. In fact, if we tried to compare the local
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* password to the DCE entry at this point, the operation
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* would fail if the hidden password feature is turned on,
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* because the password field would contain an asterisk.
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* Also go ahead and destroy the user's DCE login context
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* before we leave here (and don't bother checking the
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* status), in order to clean up credentials files in
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* /opt/dcelocal/var/security/creds. By doing this, we are
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* assuming that the user will not need DCE authentication
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* later in the program, only local authentication. If this
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* is not true, then the login_context will have to be
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* returned to the calling program, and the context purged
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* somewhere later in the program.
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*/
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sec_login_purge_context(&login_context, &status);
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return(AUTH_SUCCESS);
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} else {
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if(check_dce_status(status, "sec_login_validate_identity(2):"))
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return(AUTH_FAILURE);
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sec_login_purge_context(&login_context, &status);
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if(check_dce_status(status, "sec_login_purge_context:"))
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return(AUTH_FAILURE);
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}
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}
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(void) check_dce_status(status, "sec_login_setup_identity(2):");
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return(AUTH_FAILURE);
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}
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/* Returns 0 for DCE "ok" status, 1 otherwise */
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static int
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check_dce_status(input_status, comment)
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error_status_t input_status;
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char *comment;
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{
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int error_stat;
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unsigned char error_string[dce_c_error_string_len];
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if (input_status == rpc_s_ok)
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return(0);
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dce_error_inq_text(input_status, error_string, &error_stat);
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(void) fprintf(stderr, "%s %s\n", comment, error_string);
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return(1);
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}
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