Annotation of embedaddon/sudo/plugins/sudoers/auth/passwd.c, revision 1.1.1.2
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
1.1.1.2 ! misho 52: sudo_passwd_init(struct passwd *pw, sudo_auth *auth)
1.1 misho 53: {
1.1.1.2 ! misho 54: debug_decl(sudo_passwd_init, SUDO_DEBUG_AUTH)
! 55:
1.1 misho 56: #ifdef HAVE_SKEYACCESS
57: if (skeyaccess(pw, user_tty, NULL, NULL) == 0)
1.1.1.2 ! misho 58: debug_return_int(AUTH_FAILURE);
1.1 misho 59: #endif
60: sudo_setspent();
61: auth->data = sudo_getepw(pw);
62: sudo_endspent();
1.1.1.2 ! misho 63: debug_return_int(AUTH_SUCCESS);
1.1 misho 64: }
65:
66: int
1.1.1.2 ! misho 67: sudo_passwd_verify(struct passwd *pw, char *pass, sudo_auth *auth)
1.1 misho 68: {
69: char sav, *epass;
70: char *pw_epasswd = auth->data;
71: size_t pw_len;
72: int error;
1.1.1.2 ! misho 73: debug_decl(sudo_passwd_verify, SUDO_DEBUG_AUTH)
1.1 misho 74:
75: pw_len = strlen(pw_epasswd);
76:
77: #ifdef HAVE_GETAUTHUID
78: /* Ultrix shadow passwords may use crypt16() */
79: error = strcmp(pw_epasswd, (char *) crypt16(pass, pw_epasswd));
80: if (!error)
1.1.1.2 ! misho 81: debug_return_int(AUTH_SUCCESS);
1.1 misho 82: #endif /* HAVE_GETAUTHUID */
83:
84: /*
85: * Truncate to 8 chars if standard DES since not all crypt()'s do this.
86: * If this turns out not to be safe we will have to use OS #ifdef's (sigh).
87: */
88: sav = pass[8];
89: if (pw_len == DESLEN || HAS_AGEINFO(pw_epasswd, pw_len))
90: pass[8] = '\0';
91:
92: /*
93: * Normal UN*X password check.
94: * HP-UX may add aging info (separated by a ',') at the end so
95: * only compare the first DESLEN characters in that case.
96: */
97: epass = (char *) crypt(pass, pw_epasswd);
98: pass[8] = sav;
99: if (HAS_AGEINFO(pw_epasswd, pw_len) && strlen(epass) == DESLEN)
100: error = strncmp(pw_epasswd, epass, DESLEN);
101: else
102: error = strcmp(pw_epasswd, epass);
103:
1.1.1.2 ! misho 104: debug_return_int(error ? AUTH_FAILURE : AUTH_SUCCESS);
1.1 misho 105: }
106:
107: int
1.1.1.2 ! misho 108: sudo_passwd_cleanup(pw, auth)
1.1 misho 109: struct passwd *pw;
110: sudo_auth *auth;
111: {
112: char *pw_epasswd = auth->data;
1.1.1.2 ! misho 113: debug_decl(sudo_passwd_cleanup, SUDO_DEBUG_AUTH)
1.1 misho 114:
115: if (pw_epasswd != NULL) {
116: zero_bytes(pw_epasswd, strlen(pw_epasswd));
117: efree(pw_epasswd);
118: }
1.1.1.2 ! misho 119: debug_return_int(AUTH_SUCCESS);
1.1 misho 120: }
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