Return to sia.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / sudo / plugins / sudoers / auth

Annotation of embedaddon/sudo/plugins/sudoers/auth/sia.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (c) 1999-2005, 2007, 2010-2011
                      3:  *     Todd C. Miller <Todd.Miller@courtesan.com>
                      4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
                      6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
                      8:  *
                      9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     16:  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
                     17:  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     18:  *
                     19:  * Sponsored in part by the Defense Advanced Research Projects
                     20:  * Agency (DARPA) and Air Force Research Laboratory, Air Force
                     21:  * Materiel Command, USAF, under agreement number F39502-99-1-0512.
                     22:  */
                     23: 
                     24: #include <config.h>
                     25: 
                     26: #include <sys/types.h>
                     27: #include <sys/param.h>
                     28: #include <stdio.h>
                     29: #ifdef STDC_HEADERS
                     30: # include <stdlib.h>
                     31: # include <stddef.h>
                     32: #else
                     33: # ifdef HAVE_STDLIB_H
                     34: #  include <stdlib.h>
                     35: # endif
                     36: #endif /* STDC_HEADERS */
                     37: #ifdef HAVE_STRING_H
                     38: # include <string.h>
                     39: #endif /* HAVE_STRING_H */
                     40: #ifdef HAVE_STRINGS_H
                     41: # include <strings.h>
                     42: #endif /* HAVE_STRINGS_H */
                     43: #ifdef HAVE_UNISTD_H
                     44: # include <unistd.h>
                     45: #endif /* HAVE_UNISTD_H */
                     46: #include <pwd.h>
                     47: #include <siad.h>
                     48: 
                     49: #include "sudoers.h"
                     50: #include "sudo_auth.h"
                     51: 
                     52: static int sudo_collect(int, int, uchar_t *, int, prompt_t *);
                     53: 
                     54: static char *def_prompt;
                     55: static char **sudo_argv;
                     56: static int sudo_argc;
                     57: 
                     58: /*
                     59:  * Collection routine (callback) for limiting the timeouts in SIA
                     60:  * prompts and (possibly) setting a custom prompt.
                     61:  */
                     62: static int
                     63: sudo_collect(int timeout, int rendition, uchar_t *title, int nprompts,
                     64:     prompt_t *prompts)
                     65: {
                     66:     switch (rendition) {
                     67:        case SIAFORM:
                     68:        case SIAONELINER:
                     69:            if (timeout <= 0 || timeout > def_passwd_timeout * 60)
                     70:                timeout = def_passwd_timeout * 60;
                     71:            /*
                     72:             * Substitute custom prompt if a) the sudo prompt is not "Password:"
                     73:             * and b) the SIA prompt is "Password:" (so we know it is safe).
                     74:             * This keeps us from overwriting things like S/Key challenges.
                     75:             */
                     76:            if (strcmp((char *)prompts[0].prompt, "Password:") == 0 &&
                     77:                strcmp(def_prompt, "Password:") != 0)
                     78:                prompts[0].prompt = (unsigned char *)def_prompt;
                     79:            break;
                     80:        default:
                     81:            break;
                     82:     }
                     83: 
                     84:     return sia_collect_trm(timeout, rendition, title, nprompts, prompts);
                     85: }
                     86: 
                     87: int
                     88: sia_setup(struct passwd *pw, char **promptp, sudo_auth *auth)
                     89: {
                     90:     SIAENTITY *siah = NULL;
                     91:     int i;
                     92:     extern int NewArgc;
                     93:     extern char **NewArgv;
                     94: 
                     95:     /* Rebuild argv for sia_ses_init() */
                     96:     sudo_argc = NewArgc + 1;
                     97:     sudo_argv = emalloc2(sudo_argc + 1, sizeof(char *));
                     98:     sudo_argv[0] = "sudo";
                     99:     for (i = 0; i < NewArgc; i++)
                    100:        sudo_argv[i + 1] = NewArgv[i];
                    101:     sudo_argv[sudo_argc] = NULL;
                    102: 
                    103:     if (sia_ses_init(&siah, sudo_argc, sudo_argv, NULL, pw->pw_name, user_ttypath, 1, NULL) != SIASUCCESS) {
                    104: 
                    105:        log_error(USE_ERRNO|NO_EXIT|NO_MAIL,
                    106:            _("unable to initialize SIA session"));
                    107:        return AUTH_FATAL;
                    108:     }
                    109: 
                    110:     auth->data = (void *) siah;
                    111:     return AUTH_SUCCESS;
                    112: }
                    113: 
                    114: int
                    115: sia_verify(struct passwd *pw, char *prompt, sudo_auth *auth)
                    116: {
                    117:     SIAENTITY *siah = (SIAENTITY *) auth->data;
                    118: 
                    119:     def_prompt = prompt;               /* for sudo_collect */
                    120: 
                    121:     /* XXX - need a way to detect user hitting return or EOF at prompt */
                    122:     if (sia_ses_reauthent(sudo_collect, siah) == SIASUCCESS)
                    123:        return AUTH_SUCCESS;
                    124:     else
                    125:        return AUTH_FAILURE;
                    126: }
                    127: 
                    128: int
                    129: sia_cleanup(struct passwd *pw, sudo_auth *auth)
                    130: {
                    131:     SIAENTITY *siah = (SIAENTITY *) auth->data;
                    132: 
                    133:     (void) sia_ses_release(&siah);
                    134:     efree(sudo_argv);
                    135:     return AUTH_SUCCESS;
                    136: }