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Annotation of embedaddon/sudo/plugins/sudoers/auth/sia.c, revision 1.1.1.3

1.1       misho       1: /*
1.1.1.3 ! misho       2:  * Copyright (c) 1999-2005, 2007, 2010-2013
1.1       misho       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 <stdio.h>
                     28: #ifdef STDC_HEADERS
                     29: # include <stdlib.h>
                     30: # include <stddef.h>
                     31: #else
                     32: # ifdef HAVE_STDLIB_H
                     33: #  include <stdlib.h>
                     34: # endif
                     35: #endif /* STDC_HEADERS */
                     36: #ifdef HAVE_STRING_H
                     37: # include <string.h>
                     38: #endif /* HAVE_STRING_H */
                     39: #ifdef HAVE_STRINGS_H
                     40: # include <strings.h>
                     41: #endif /* HAVE_STRINGS_H */
                     42: #ifdef HAVE_UNISTD_H
                     43: # include <unistd.h>
                     44: #endif /* HAVE_UNISTD_H */
                     45: #include <pwd.h>
                     46: #include <siad.h>
                     47: 
                     48: #include "sudoers.h"
                     49: #include "sudo_auth.h"
                     50: 
                     51: static int sudo_collect(int, int, uchar_t *, int, prompt_t *);
                     52: 
                     53: static char *def_prompt;
                     54: static char **sudo_argv;
                     55: static int sudo_argc;
                     56: 
                     57: /*
                     58:  * Collection routine (callback) for limiting the timeouts in SIA
                     59:  * prompts and (possibly) setting a custom prompt.
                     60:  */
                     61: static int
                     62: sudo_collect(int timeout, int rendition, uchar_t *title, int nprompts,
                     63:     prompt_t *prompts)
                     64: {
1.1.1.2   misho      65:     debug_decl(sudo_collect, SUDO_DEBUG_AUTH)
                     66: 
1.1       misho      67:     switch (rendition) {
                     68:        case SIAFORM:
                     69:        case SIAONELINER:
                     70:            if (timeout <= 0 || timeout > def_passwd_timeout * 60)
                     71:                timeout = def_passwd_timeout * 60;
                     72:            /*
                     73:             * Substitute custom prompt if a) the sudo prompt is not "Password:"
                     74:             * and b) the SIA prompt is "Password:" (so we know it is safe).
                     75:             * This keeps us from overwriting things like S/Key challenges.
                     76:             */
                     77:            if (strcmp((char *)prompts[0].prompt, "Password:") == 0 &&
                     78:                strcmp(def_prompt, "Password:") != 0)
                     79:                prompts[0].prompt = (unsigned char *)def_prompt;
                     80:            break;
                     81:        default:
                     82:            break;
                     83:     }
                     84: 
1.1.1.2   misho      85:     debug_return_int(sia_collect_trm(timeout, rendition, title, nprompts, prompts));
1.1       misho      86: }
                     87: 
                     88: int
1.1.1.2   misho      89: sudo_sia_setup(struct passwd *pw, char **promptp, sudo_auth *auth)
1.1       misho      90: {
                     91:     SIAENTITY *siah = NULL;
                     92:     int i;
                     93:     extern int NewArgc;
                     94:     extern char **NewArgv;
1.1.1.2   misho      95:     debug_decl(sudo_sia_setup, SUDO_DEBUG_AUTH)
1.1       misho      96: 
                     97:     /* Rebuild argv for sia_ses_init() */
                     98:     sudo_argc = NewArgc + 1;
                     99:     sudo_argv = emalloc2(sudo_argc + 1, sizeof(char *));
                    100:     sudo_argv[0] = "sudo";
                    101:     for (i = 0; i < NewArgc; i++)
                    102:        sudo_argv[i + 1] = NewArgv[i];
                    103:     sudo_argv[sudo_argc] = NULL;
                    104: 
                    105:     if (sia_ses_init(&siah, sudo_argc, sudo_argv, NULL, pw->pw_name, user_ttypath, 1, NULL) != SIASUCCESS) {
                    106: 
1.1.1.3 ! misho     107:        log_warning(USE_ERRNO|NO_MAIL,
        !           108:            N_("unable to initialize SIA session"));
1.1.1.2   misho     109:        debug_return_int(AUTH_FATAL);
1.1       misho     110:     }
                    111: 
                    112:     auth->data = (void *) siah;
1.1.1.2   misho     113:     debug_return_int(AUTH_SUCCESS);
1.1       misho     114: }
                    115: 
                    116: int
1.1.1.2   misho     117: sudo_sia_verify(struct passwd *pw, char *prompt, sudo_auth *auth)
1.1       misho     118: {
                    119:     SIAENTITY *siah = (SIAENTITY *) auth->data;
1.1.1.2   misho     120:     debug_decl(sudo_sia_verify, SUDO_DEBUG_AUTH)
1.1       misho     121: 
                    122:     def_prompt = prompt;               /* for sudo_collect */
                    123: 
                    124:     /* XXX - need a way to detect user hitting return or EOF at prompt */
                    125:     if (sia_ses_reauthent(sudo_collect, siah) == SIASUCCESS)
1.1.1.2   misho     126:        debug_return_int(AUTH_SUCCESS);
1.1       misho     127:     else
1.1.1.2   misho     128:        debug_return_int(AUTH_FAILURE);
1.1       misho     129: }
                    130: 
                    131: int
1.1.1.2   misho     132: sudo_sia_cleanup(struct passwd *pw, sudo_auth *auth)
1.1       misho     133: {
                    134:     SIAENTITY *siah = (SIAENTITY *) auth->data;
1.1.1.2   misho     135:     debug_decl(sudo_sia_cleanup, SUDO_DEBUG_AUTH)
1.1       misho     136: 
                    137:     (void) sia_ses_release(&siah);
                    138:     efree(sudo_argv);
1.1.1.2   misho     139:     debug_return_int(AUTH_SUCCESS);
1.1       misho     140: }