Contents of /tags/mkinitrd-6_1_10/busybox/libbb/pw_encrypt.c
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Wed Oct 28 09:51:31 2009 UTC (14 years, 11 months ago) by niro
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Wed Oct 28 09:51:31 2009 UTC (14 years, 11 months ago) by niro
File MIME type: text/plain
File size: 1843 byte(s)
tagged 'mkinitrd-6_1_10'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Utility routine. |
4 | * |
5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
8 | */ |
9 | |
10 | #include "libbb.h" |
11 | |
12 | #if ENABLE_USE_BB_CRYPT |
13 | |
14 | /* |
15 | * DES and MD5 crypt implementations are taken from uclibc. |
16 | * They were modified to not use static buffers. |
17 | */ |
18 | /* Common for them */ |
19 | static const uint8_t ascii64[] = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; |
20 | #include "pw_encrypt_des.c" |
21 | #include "pw_encrypt_md5.c" |
22 | |
23 | /* Other advanced crypt ids: */ |
24 | /* $2$ or $2a$: Blowfish */ |
25 | /* $5$: SHA-256 */ |
26 | /* $6$: SHA-512 */ |
27 | /* TODO: implement SHA - http://people.redhat.com/drepper/SHA-crypt.txt */ |
28 | |
29 | static struct const_des_ctx *des_cctx; |
30 | static struct des_ctx *des_ctx; |
31 | |
32 | /* my_crypt returns malloc'ed data */ |
33 | static char *my_crypt(const char *key, const char *salt) |
34 | { |
35 | /* First, check if we are supposed to be using the MD5 replacement |
36 | * instead of DES... */ |
37 | if (salt[0] == '$' && salt[1] == '1' && salt[2] == '$') { |
38 | return md5_crypt(xzalloc(MD5_OUT_BUFSIZE), (unsigned char*)key, (unsigned char*)salt); |
39 | } |
40 | |
41 | { |
42 | if (!des_cctx) |
43 | des_cctx = const_des_init(); |
44 | des_ctx = des_init(des_ctx, des_cctx); |
45 | return des_crypt(des_ctx, xzalloc(DES_OUT_BUFSIZE), (unsigned char*)key, (unsigned char*)salt); |
46 | } |
47 | } |
48 | |
49 | /* So far nobody wants to have it public */ |
50 | static void my_crypt_cleanup(void) |
51 | { |
52 | free(des_cctx); |
53 | free(des_ctx); |
54 | des_cctx = NULL; |
55 | des_ctx = NULL; |
56 | } |
57 | |
58 | char* FAST_FUNC pw_encrypt(const char *clear, const char *salt, int cleanup) |
59 | { |
60 | char *encrypted; |
61 | |
62 | encrypted = my_crypt(clear, salt); |
63 | |
64 | if (cleanup) |
65 | my_crypt_cleanup(); |
66 | |
67 | return encrypted; |
68 | } |
69 | |
70 | #else /* if !ENABLE_USE_BB_CRYPT */ |
71 | |
72 | char* FAST_FUNC pw_encrypt(const char *clear, const char *salt, int cleanup) |
73 | { |
74 | return xstrdup(crypt(clear, salt)); |
75 | } |
76 | |
77 | #endif |