Annotation of /trunk/mkinitrd-magellan/busybox/libbb/correct_password.c
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Revision 984 -
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 2974 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | niro | 532 | /* vi: set sw=4 ts=4: */ |
2 | /* | ||
3 | * Copyright 1989 - 1991, Julianne Frances Haugh <jockgrrl@austin.rr.com> | ||
4 | * All rights reserved. | ||
5 | * | ||
6 | * Redistribution and use in source and binary forms, with or without | ||
7 | * modification, are permitted provided that the following conditions | ||
8 | * are met: | ||
9 | * 1. Redistributions of source code must retain the above copyright | ||
10 | * notice, this list of conditions and the following disclaimer. | ||
11 | * 2. Redistributions in binary form must reproduce the above copyright | ||
12 | * notice, this list of conditions and the following disclaimer in the | ||
13 | * documentation and/or other materials provided with the distribution. | ||
14 | * 3. Neither the name of Julianne F. Haugh nor the names of its contributors | ||
15 | * may be used to endorse or promote products derived from this software | ||
16 | * without specific prior written permission. | ||
17 | * | ||
18 | * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND | ||
19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
21 | * ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE | ||
22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||
24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||
27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||
28 | * SUCH DAMAGE. | ||
29 | */ | ||
30 | |||
31 | #include "libbb.h" | ||
32 | |||
33 | /* Ask the user for a password. | ||
34 | niro | 816 | * Return 1 if the user gives the correct password for entry PW, |
35 | * 0 if not. Return 1 without asking if PW has an empty password. | ||
36 | * | ||
37 | * NULL pw means "just fake it for login with bad username" */ | ||
38 | niro | 532 | |
39 | niro | 816 | int FAST_FUNC correct_password(const struct passwd *pw) |
40 | niro | 532 | { |
41 | niro | 816 | char *unencrypted, *encrypted; |
42 | const char *correct; | ||
43 | int r; | ||
44 | #if ENABLE_FEATURE_SHADOWPASSWDS | ||
45 | /* Using _r function to avoid pulling in static buffers */ | ||
46 | struct spwd spw; | ||
47 | char buffer[256]; | ||
48 | #endif | ||
49 | niro | 532 | |
50 | niro | 816 | /* fake salt. crypt() can choke otherwise. */ |
51 | correct = "aa"; | ||
52 | if (!pw) { | ||
53 | /* "aa" will never match */ | ||
54 | goto fake_it; | ||
55 | } | ||
56 | correct = pw->pw_passwd; | ||
57 | #if ENABLE_FEATURE_SHADOWPASSWDS | ||
58 | if ((correct[0] == 'x' || correct[0] == '*') && !correct[1]) { | ||
59 | /* getspnam_r may return 0 yet set result to NULL. | ||
60 | * At least glibc 2.4 does this. Be extra paranoid here. */ | ||
61 | struct spwd *result = NULL; | ||
62 | r = getspnam_r(pw->pw_name, &spw, buffer, sizeof(buffer), &result); | ||
63 | correct = (r || !result) ? "aa" : result->sp_pwdp; | ||
64 | } | ||
65 | niro | 532 | #endif |
66 | |||
67 | niro | 816 | if (!correct[0]) /* empty password field? */ |
68 | niro | 532 | return 1; |
69 | |||
70 | niro | 816 | fake_it: |
71 | niro | 984 | unencrypted = bb_ask_stdin("Password: "); |
72 | niro | 532 | if (!unencrypted) { |
73 | return 0; | ||
74 | } | ||
75 | niro | 816 | encrypted = pw_encrypt(unencrypted, correct, 1); |
76 | r = (strcmp(encrypted, correct) == 0); | ||
77 | free(encrypted); | ||
78 | niro | 532 | memset(unencrypted, 0, strlen(unencrypted)); |
79 | niro | 816 | return r; |
80 | niro | 532 | } |