1 /*
2 * Copyright (c) 2000-2001, Boris Popov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/5.2/sys/netsmb/smb_crypt.c 116189 2003-06-11 05:37:42Z obrien $");
35
36 #include <sys/param.h>
37 #include <sys/malloc.h>
38 #include <sys/kernel.h>
39 #include <sys/systm.h>
40 #include <sys/conf.h>
41 #include <sys/proc.h>
42 #include <sys/fcntl.h>
43 #include <sys/socket.h>
44 #include <sys/socketvar.h>
45 #include <sys/sysctl.h>
46
47 #include <sys/md4.h>
48 #include <sys/iconv.h>
49
50 #include <netsmb/smb.h>
51 #include <netsmb/smb_conn.h>
52 #include <netsmb/smb_subr.h>
53 #include <netsmb/smb_dev.h>
54
55 #include "opt_netsmb.h"
56
57 #ifdef NETSMBCRYPTO
58
59 #include <crypto/des/des.h>
60
61 static u_char N8[] = {0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25};
62
63
64 static void
65 smb_E(const u_char *key, u_char *data, u_char *dest)
66 {
67 des_key_schedule *ksp;
68 u_char kk[8];
69
70 kk[0] = key[0] & 0xfe;
71 kk[1] = key[0] << 7 | (key[1] >> 1 & 0xfe);
72 kk[2] = key[1] << 6 | (key[2] >> 2 & 0xfe);
73 kk[3] = key[2] << 5 | (key[3] >> 3 & 0xfe);
74 kk[4] = key[3] << 4 | (key[4] >> 4 & 0xfe);
75 kk[5] = key[4] << 3 | (key[5] >> 5 & 0xfe);
76 kk[6] = key[5] << 2 | (key[6] >> 6 & 0xfe);
77 kk[7] = key[6] << 1;
78 ksp = malloc(sizeof(des_key_schedule), M_SMBTEMP, M_WAITOK);
79 des_set_key((des_cblock *)kk, *ksp);
80 des_ecb_encrypt((des_cblock *)data, (des_cblock *)dest, *ksp, 1);
81 free(ksp, M_SMBTEMP);
82 }
83 #endif
84
85
86 int
87 smb_encrypt(const u_char *apwd, u_char *C8, u_char *RN)
88 {
89 #ifdef NETSMBCRYPTO
90 u_char *p, *P14, *S21;
91
92 p = malloc(14 + 21, M_SMBTEMP, M_WAITOK);
93 bzero(p, 14 + 21);
94 P14 = p;
95 S21 = p + 14;
96 bcopy(apwd, P14, min(14, strlen(apwd)));
97 /*
98 * S21 = concat(Ex(P14, N8), zeros(5));
99 */
100 smb_E(P14, N8, S21);
101 smb_E(P14 + 7, N8, S21 + 8);
102
103 smb_E(S21, C8, RN);
104 smb_E(S21 + 7, C8, RN + 8);
105 smb_E(S21 + 14, C8, RN + 16);
106 free(p, M_SMBTEMP);
107 return 0;
108 #else
109 SMBERROR("password encryption is not available\n");
110 bzero(RN, 24);
111 return EAUTH;
112 #endif
113 }
114
115 int
116 smb_ntencrypt(const u_char *apwd, u_char *C8, u_char *RN)
117 {
118 #ifdef NETSMBCRYPTO
119 u_char S21[21];
120 u_int16_t *unipwd;
121 MD4_CTX *ctxp;
122 int len;
123
124 len = strlen(apwd);
125 unipwd = malloc((len + 1) * sizeof(u_int16_t), M_SMBTEMP, M_WAITOK);
126 /*
127 * S21 = concat(MD4(U(apwd)), zeros(5));
128 */
129 smb_strtouni(unipwd, apwd);
130 ctxp = malloc(sizeof(MD4_CTX), M_SMBTEMP, M_WAITOK);
131 MD4Init(ctxp);
132 MD4Update(ctxp, (u_char*)unipwd, len * sizeof(u_int16_t));
133 free(unipwd, M_SMBTEMP);
134 bzero(S21, 21);
135 MD4Final(S21, ctxp);
136 free(ctxp, M_SMBTEMP);
137
138 smb_E(S21, C8, RN);
139 smb_E(S21 + 7, C8, RN + 8);
140 smb_E(S21 + 14, C8, RN + 16);
141 return 0;
142 #else
143 SMBERROR("password encryption is not available\n");
144 bzero(RN, 24);
145 return EAUTH;
146 #endif
147 }
148
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