1 | /* $NetBSD: smb_crypt.c,v 1.11 2009/03/18 16:00:24 cegger Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 2000-2001, Boris Popov |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * 3. All advertising materials mentioning features or use of this software |
16 | * must display the following acknowledgement: |
17 | * This product includes software developed by Boris Popov. |
18 | * 4. Neither the name of the author nor the names of any co-contributors |
19 | * may be used to endorse or promote products derived from this software |
20 | * without specific prior written permission. |
21 | * |
22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
32 | * SUCH DAMAGE. |
33 | * |
34 | * FreeBSD: src/sys/netsmb/smb_crypt.c,v 1.3 2001/08/21 08:07:18 bp Exp |
35 | */ |
36 | |
37 | #include <sys/cdefs.h> |
38 | __KERNEL_RCSID(0, "$NetBSD: smb_crypt.c,v 1.11 2009/03/18 16:00:24 cegger Exp $" ); |
39 | |
40 | #include <sys/param.h> |
41 | #include <sys/malloc.h> |
42 | #include <sys/kernel.h> |
43 | #include <sys/systm.h> |
44 | #include <sys/conf.h> |
45 | #include <sys/proc.h> |
46 | #include <sys/fcntl.h> |
47 | #include <sys/socket.h> |
48 | #include <sys/socketvar.h> |
49 | #include <sys/sysctl.h> |
50 | |
51 | #include <sys/md4.h> |
52 | |
53 | #include <netsmb/smb.h> |
54 | #include <netsmb/smb_conn.h> |
55 | #include <netsmb/smb_subr.h> |
56 | #include <netsmb/smb_dev.h> |
57 | |
58 | /* always enable */ |
59 | #define NETSMBCRYPTO |
60 | |
61 | #ifdef NETSMBCRYPTO |
62 | |
63 | #include <crypto/des/des.h> |
64 | |
65 | static const u_char N8[] = {0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25}; |
66 | |
67 | |
68 | static void |
69 | smb_E(const u_char *key, const u_char *data, u_char *dest) |
70 | { |
71 | des_key_schedule *ksp; |
72 | u_char kk[8]; |
73 | |
74 | kk[0] = key[0] & 0xfe; |
75 | kk[1] = key[0] << 7 | (key[1] >> 1 & 0xfe); |
76 | kk[2] = key[1] << 6 | (key[2] >> 2 & 0xfe); |
77 | kk[3] = key[2] << 5 | (key[3] >> 3 & 0xfe); |
78 | kk[4] = key[3] << 4 | (key[4] >> 4 & 0xfe); |
79 | kk[5] = key[4] << 3 | (key[5] >> 5 & 0xfe); |
80 | kk[6] = key[5] << 2 | (key[6] >> 6 & 0xfe); |
81 | kk[7] = key[6] << 1; |
82 | ksp = malloc(sizeof(des_key_schedule), M_SMBTEMP, M_WAITOK); |
83 | des_set_key((des_cblock *)kk, *ksp); |
84 | /* XXXUNCONST */ |
85 | des_ecb_encrypt(__UNCONST(data), (des_cblock *)dest, *ksp, 1); |
86 | free(ksp, M_SMBTEMP); |
87 | } |
88 | #endif |
89 | |
90 | |
91 | int |
92 | smb_encrypt(const u_char *apwd, u_char *C8, u_char *RN) |
93 | { |
94 | #ifdef NETSMBCRYPTO |
95 | u_char *p, *P14, *S21; |
96 | |
97 | p = malloc(14 + 21, M_SMBTEMP, M_WAITOK|M_ZERO); |
98 | P14 = p; |
99 | S21 = p + 14; |
100 | bcopy(apwd, P14, min(14, strlen(apwd))); |
101 | /* |
102 | * S21 = concat(Ex(P14, N8), zeros(5)); |
103 | */ |
104 | smb_E(P14, N8, S21); |
105 | smb_E(P14 + 7, N8, S21 + 8); |
106 | |
107 | smb_E(S21, C8, RN); |
108 | smb_E(S21 + 7, C8, RN + 8); |
109 | smb_E(S21 + 14, C8, RN + 16); |
110 | free(p, M_SMBTEMP); |
111 | return 0; |
112 | #else |
113 | SMBERROR(("password encryption is not available\n" )); |
114 | memset(RN, 0, 24); |
115 | return EAUTH; |
116 | #endif |
117 | } |
118 | |
119 | int |
120 | smb_ntencrypt(const u_char *apwd, u_char *C8, u_char *RN) |
121 | { |
122 | #ifdef NETSMBCRYPTO |
123 | u_char S21[21]; |
124 | u_int16_t *unipwd; |
125 | MD4_CTX *ctxp; |
126 | int len; |
127 | |
128 | len = strlen(apwd); |
129 | unipwd = malloc((len + 1) * sizeof(u_int16_t), M_SMBTEMP, M_WAITOK); |
130 | /* |
131 | * S21 = concat(MD4(U(apwd)), zeros(5)); |
132 | */ |
133 | smb_strtouni(unipwd, apwd); |
134 | ctxp = malloc(sizeof(MD4_CTX), M_SMBTEMP, M_WAITOK); |
135 | MD4Init(ctxp); |
136 | MD4Update(ctxp, (u_char*)unipwd, len * sizeof(u_int16_t)); |
137 | free(unipwd, M_SMBTEMP); |
138 | memset(S21, 0, 21); |
139 | MD4Final(S21, ctxp); |
140 | free(ctxp, M_SMBTEMP); |
141 | |
142 | smb_E(S21, C8, RN); |
143 | smb_E(S21 + 7, C8, RN + 8); |
144 | smb_E(S21 + 14, C8, RN + 16); |
145 | return 0; |
146 | #else |
147 | SMBERROR(("password encryption is not available\n" )); |
148 | memset(RN, 0, 24); |
149 | return EAUTH; |
150 | #endif |
151 | } |
152 | |
153 | |