Annotation of embedaddon/sudo/plugins/sudoers/auth/passwd.c, revision 1.1.1.4
1.1 misho 1: /*
1.1.1.3 misho 2: * Copyright (c) 1999-2005, 2010-2013 Todd C. Miller <Todd.Miller@courtesan.com>
1.1 misho 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 <stdio.h>
25: #ifdef STDC_HEADERS
26: # include <stdlib.h>
27: # include <stddef.h>
28: #else
29: # ifdef HAVE_STDLIB_H
30: # include <stdlib.h>
31: # endif
32: #endif /* STDC_HEADERS */
33: #ifdef HAVE_STRING_H
34: # include <string.h>
35: #endif /* HAVE_STRING_H */
36: #ifdef HAVE_STRINGS_H
37: # include <strings.h>
38: #endif /* HAVE_STRINGS_H */
39: #ifdef HAVE_UNISTD_H
40: # include <unistd.h>
41: #endif /* HAVE_UNISTD_H */
42: #include <pwd.h>
43:
44: #include "sudoers.h"
45: #include "sudo_auth.h"
46:
47: #define DESLEN 13
48: #define HAS_AGEINFO(p, l) (l == 18 && p[DESLEN] == ',')
49:
50: int
1.1.1.2 misho 51: sudo_passwd_init(struct passwd *pw, sudo_auth *auth)
1.1 misho 52: {
1.1.1.2 misho 53: debug_decl(sudo_passwd_init, SUDO_DEBUG_AUTH)
54:
1.1 misho 55: #ifdef HAVE_SKEYACCESS
56: if (skeyaccess(pw, user_tty, NULL, NULL) == 0)
1.1.1.2 misho 57: debug_return_int(AUTH_FAILURE);
1.1 misho 58: #endif
59: sudo_setspent();
60: auth->data = sudo_getepw(pw);
61: sudo_endspent();
1.1.1.2 misho 62: debug_return_int(AUTH_SUCCESS);
1.1 misho 63: }
64:
65: int
1.1.1.2 misho 66: sudo_passwd_verify(struct passwd *pw, char *pass, sudo_auth *auth)
1.1 misho 67: {
68: char sav, *epass;
69: char *pw_epasswd = auth->data;
70: size_t pw_len;
1.1.1.3 misho 71: int matched = 0;
1.1.1.2 misho 72: debug_decl(sudo_passwd_verify, SUDO_DEBUG_AUTH)
1.1 misho 73:
74: pw_len = strlen(pw_epasswd);
75:
76: #ifdef HAVE_GETAUTHUID
77: /* Ultrix shadow passwords may use crypt16() */
1.1.1.3 misho 78: epass = (char *) crypt16(pass, pw_epasswd);
79: if (epass != NULL && strcmp(pw_epasswd, epass) == 0)
1.1.1.2 misho 80: debug_return_int(AUTH_SUCCESS);
1.1 misho 81: #endif /* HAVE_GETAUTHUID */
82:
83: /*
84: * Truncate to 8 chars if standard DES since not all crypt()'s do this.
85: * If this turns out not to be safe we will have to use OS #ifdef's (sigh).
86: */
87: sav = pass[8];
88: if (pw_len == DESLEN || HAS_AGEINFO(pw_epasswd, pw_len))
89: pass[8] = '\0';
90:
91: /*
92: * Normal UN*X password check.
93: * HP-UX may add aging info (separated by a ',') at the end so
94: * only compare the first DESLEN characters in that case.
95: */
96: epass = (char *) crypt(pass, pw_epasswd);
97: pass[8] = sav;
1.1.1.3 misho 98: if (epass != NULL) {
99: if (HAS_AGEINFO(pw_epasswd, pw_len) && strlen(epass) == DESLEN)
100: matched = !strncmp(pw_epasswd, epass, DESLEN);
101: else
102: matched = !strcmp(pw_epasswd, epass);
103: }
1.1 misho 104:
1.1.1.3 misho 105: debug_return_int(matched ? AUTH_SUCCESS : AUTH_FAILURE);
1.1 misho 106: }
107:
108: int
1.1.1.2 misho 109: sudo_passwd_cleanup(pw, auth)
1.1 misho 110: struct passwd *pw;
111: sudo_auth *auth;
112: {
113: char *pw_epasswd = auth->data;
1.1.1.2 misho 114: debug_decl(sudo_passwd_cleanup, SUDO_DEBUG_AUTH)
1.1 misho 115:
116: if (pw_epasswd != NULL) {
1.1.1.4 ! misho 117: memset_s(pw_epasswd, SUDO_CONV_REPL_MAX, 0, strlen(pw_epasswd));
1.1 misho 118: efree(pw_epasswd);
119: }
1.1.1.2 misho 120: debug_return_int(AUTH_SUCCESS);
1.1 misho 121: }
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