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 * $FreeBSD: releng/5.0/sys/netsmb/smb_crypt.c 82036 2001-08-21 08:07:18Z bp $
33 */
34 #include <sys/param.h>
35 #include <sys/malloc.h>
36 #include <sys/kernel.h>
37 #include <sys/systm.h>
38 #include <sys/conf.h>
39 #include <sys/proc.h>
40 #include <sys/fcntl.h>
41 #include <sys/socket.h>
42 #include <sys/socketvar.h>
43 #include <sys/sysctl.h>
44
45 #include <sys/md4.h>
46 #include <sys/iconv.h>
47
48 #include <netsmb/smb.h>
49 #include <netsmb/smb_conn.h>
50 #include <netsmb/smb_subr.h>
51 #include <netsmb/smb_dev.h>
52
53 #include "opt_netsmb.h"
54
55 #ifdef NETSMBCRYPTO
56
57 #include <crypto/des/des.h>
58
59 static u_char N8[] = {0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25};
60
61
62 static void
63 smb_E(const u_char *key, u_char *data, u_char *dest)
64 {
65 des_key_schedule *ksp;
66 u_char kk[8];
67
68 kk[0] = key[0] & 0xfe;
69 kk[1] = key[0] << 7 | (key[1] >> 1 & 0xfe);
70 kk[2] = key[1] << 6 | (key[2] >> 2 & 0xfe);
71 kk[3] = key[2] << 5 | (key[3] >> 3 & 0xfe);
72 kk[4] = key[3] << 4 | (key[4] >> 4 & 0xfe);
73 kk[5] = key[4] << 3 | (key[5] >> 5 & 0xfe);
74 kk[6] = key[5] << 2 | (key[6] >> 6 & 0xfe);
75 kk[7] = key[6] << 1;
76 ksp = malloc(sizeof(des_key_schedule), M_SMBTEMP, M_WAITOK);
77 des_set_key((des_cblock *)kk, *ksp);
78 des_ecb_encrypt((des_cblock *)data, (des_cblock *)dest, *ksp, 1);
79 free(ksp, M_SMBTEMP);
80 }
81 #endif
82
83
84 int
85 smb_encrypt(const u_char *apwd, u_char *C8, u_char *RN)
86 {
87 #ifdef NETSMBCRYPTO
88 u_char *p, *P14, *S21;
89
90 p = malloc(14 + 21, M_SMBTEMP, M_WAITOK);
91 bzero(p, 14 + 21);
92 P14 = p;
93 S21 = p + 14;
94 bcopy(apwd, P14, min(14, strlen(apwd)));
95 /*
96 * S21 = concat(Ex(P14, N8), zeros(5));
97 */
98 smb_E(P14, N8, S21);
99 smb_E(P14 + 7, N8, S21 + 8);
100
101 smb_E(S21, C8, RN);
102 smb_E(S21 + 7, C8, RN + 8);
103 smb_E(S21 + 14, C8, RN + 16);
104 free(p, M_SMBTEMP);
105 return 0;
106 #else
107 SMBERROR("password encryption is not available\n");
108 bzero(RN, 24);
109 return EAUTH;
110 #endif
111 }
112
113 int
114 smb_ntencrypt(const u_char *apwd, u_char *C8, u_char *RN)
115 {
116 #ifdef NETSMBCRYPTO
117 u_char S21[21];
118 u_int16_t *unipwd;
119 MD4_CTX *ctxp;
120 int len;
121
122 len = strlen(apwd);
123 unipwd = malloc((len + 1) * sizeof(u_int16_t), M_SMBTEMP, M_WAITOK);
124 /*
125 * S21 = concat(MD4(U(apwd)), zeros(5));
126 */
127 smb_strtouni(unipwd, apwd);
128 ctxp = malloc(sizeof(MD4_CTX), M_SMBTEMP, M_WAITOK);
129 MD4Init(ctxp);
130 MD4Update(ctxp, (u_char*)unipwd, len * sizeof(u_int16_t));
131 free(unipwd, M_SMBTEMP);
132 bzero(S21, 21);
133 MD4Final(S21, ctxp);
134 free(ctxp, M_SMBTEMP);
135
136 smb_E(S21, C8, RN);
137 smb_E(S21 + 7, C8, RN + 8);
138 smb_E(S21 + 14, C8, RN + 16);
139 return 0;
140 #else
141 SMBERROR("password encryption is not available\n");
142 bzero(RN, 24);
143 return EAUTH;
144 #endif
145 }
146
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