Annotation of embedaddon/sudo/plugins/sudoers/auth/passwd.c, revision 1.1.1.1
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: }
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