| 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 | |