Return to passwd.c CVS log

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

Annotation of embedaddon/sudo/plugins/sudoers/auth/passwd.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (c) 1999-2005, 2010-2011 Todd C. Miller <Todd.Miller@courtesan.com>
        !             3:  *
        !             4:  * Permission to use, copy, modify, and distribute this software for any
        !             5:  * purpose with or without fee is hereby granted, provided that the above
        !             6:  * copyright notice and this permission notice appear in all copies.
        !             7:  *
        !             8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !             9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            12:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            13:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            14:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            15:  *
        !            16:  * Sponsored in part by the Defense Advanced Research Projects
        !            17:  * Agency (DARPA) and Air Force Research Laboratory, Air Force
        !            18:  * Materiel Command, USAF, under agreement number F39502-99-1-0512.
        !            19:  */
        !            20: 
        !            21: #include <config.h>
        !            22: 
        !            23: #include <sys/types.h>
        !            24: #include <sys/param.h>
        !            25: #include <stdio.h>
        !            26: #ifdef STDC_HEADERS
        !            27: # include <stdlib.h>
        !            28: # include <stddef.h>
        !            29: #else
        !            30: # ifdef HAVE_STDLIB_H
        !            31: #  include <stdlib.h>
        !            32: # endif
        !            33: #endif /* STDC_HEADERS */
        !            34: #ifdef HAVE_STRING_H
        !            35: # include <string.h>
        !            36: #endif /* HAVE_STRING_H */
        !            37: #ifdef HAVE_STRINGS_H
        !            38: # include <strings.h>
        !            39: #endif /* HAVE_STRINGS_H */
        !            40: #ifdef HAVE_UNISTD_H
        !            41: # include <unistd.h>
        !            42: #endif /* HAVE_UNISTD_H */
        !            43: #include <pwd.h>
        !            44: 
        !            45: #include "sudoers.h"
        !            46: #include "sudo_auth.h"
        !            47: 
        !            48: #define DESLEN                 13
        !            49: #define HAS_AGEINFO(p, l)      (l == 18 && p[DESLEN] == ',')
        !            50: 
        !            51: int
        !            52: passwd_init(struct passwd *pw, sudo_auth *auth)
        !            53: {
        !            54: #ifdef HAVE_SKEYACCESS
        !            55:     if (skeyaccess(pw, user_tty, NULL, NULL) == 0)
        !            56:        return AUTH_FAILURE;
        !            57: #endif
        !            58:     sudo_setspent();
        !            59:     auth->data = sudo_getepw(pw);
        !            60:     sudo_endspent();
        !            61:     return AUTH_SUCCESS;
        !            62: }
        !            63: 
        !            64: int
        !            65: passwd_verify(struct passwd *pw, char *pass, sudo_auth *auth)
        !            66: {
        !            67:     char sav, *epass;
        !            68:     char *pw_epasswd = auth->data;
        !            69:     size_t pw_len;
        !            70:     int error;
        !            71: 
        !            72:     pw_len = strlen(pw_epasswd);
        !            73: 
        !            74: #ifdef HAVE_GETAUTHUID
        !            75:     /* Ultrix shadow passwords may use crypt16() */
        !            76:     error = strcmp(pw_epasswd, (char *) crypt16(pass, pw_epasswd));
        !            77:     if (!error)
        !            78:        return AUTH_SUCCESS;
        !            79: #endif /* HAVE_GETAUTHUID */
        !            80: 
        !            81:     /*
        !            82:      * Truncate to 8 chars if standard DES since not all crypt()'s do this.
        !            83:      * If this turns out not to be safe we will have to use OS #ifdef's (sigh).
        !            84:      */
        !            85:     sav = pass[8];
        !            86:     if (pw_len == DESLEN || HAS_AGEINFO(pw_epasswd, pw_len))
        !            87:        pass[8] = '\0';
        !            88: 
        !            89:     /*
        !            90:      * Normal UN*X password check.
        !            91:      * HP-UX may add aging info (separated by a ',') at the end so
        !            92:      * only compare the first DESLEN characters in that case.
        !            93:      */
        !            94:     epass = (char *) crypt(pass, pw_epasswd);
        !            95:     pass[8] = sav;
        !            96:     if (HAS_AGEINFO(pw_epasswd, pw_len) && strlen(epass) == DESLEN)
        !            97:        error = strncmp(pw_epasswd, epass, DESLEN);
        !            98:     else
        !            99:        error = strcmp(pw_epasswd, epass);
        !           100: 
        !           101:     return error ? AUTH_FAILURE : AUTH_SUCCESS;
        !           102: }
        !           103: 
        !           104: int
        !           105: passwd_cleanup(pw, auth)
        !           106:     struct passwd *pw;
        !           107:     sudo_auth *auth;
        !           108: {
        !           109:     char *pw_epasswd = auth->data;
        !           110: 
        !           111:     if (pw_epasswd != NULL) {
        !           112:        zero_bytes(pw_epasswd, strlen(pw_epasswd));
        !           113:        efree(pw_epasswd);
        !           114:     }
        !           115:     return AUTH_SUCCESS;
        !           116: }