Annotation of src/sys/netsmb/smb_crypt.c, Revision 1.8
1.8 ! christos 1: /* $NetBSD: smb_crypt.c,v 1.6.2.1 2005/11/10 14:11:55 skrll Exp $ */
1.1 deberg 2:
3: /*
1.3 deberg 4: * Copyright (c) 2000-2001, Boris Popov
1.1 deberg 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.
1.3 deberg 33: *
34: * FreeBSD: src/sys/netsmb/smb_crypt.c,v 1.3 2001/08/21 08:07:18 bp Exp
1.1 deberg 35: */
1.6 jdolecek 36:
37: #include <sys/cdefs.h>
1.8 ! christos 38: __KERNEL_RCSID(0, "$NetBSD: smb_crypt.c,v 1.6.2.1 2005/11/10 14:11:55 skrll Exp $");
1.6 jdolecek 39:
1.1 deberg 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>
1.3 deberg 49: #include <sys/sysctl.h>
1.1 deberg 50:
1.3 deberg 51: #include <sys/md4.h>
1.1 deberg 52:
53: #include <netsmb/smb.h>
54: #include <netsmb/smb_conn.h>
55: #include <netsmb/smb_subr.h>
56: #include <netsmb/smb_dev.h>
1.3 deberg 57:
1.5 jdolecek 58: /* always enable */
59: #define NETSMBCRYPTO
60:
1.3 deberg 61: #ifdef NETSMBCRYPTO
1.1 deberg 62:
63: #include <crypto/des/des.h>
64:
1.5 jdolecek 65: static const u_char N8[] = {0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25};
1.1 deberg 66:
67:
68: static void
1.5 jdolecek 69: smb_E(const u_char *key, const u_char *data, u_char *dest)
1.1 deberg 70: {
1.3 deberg 71: des_key_schedule *ksp;
1.1 deberg 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;
1.3 deberg 82: ksp = malloc(sizeof(des_key_schedule), M_SMBTEMP, M_WAITOK);
83: des_set_key((des_cblock *)kk, *ksp);
1.7 christos 84: /* XXXUNCONST */
85: des_ecb_encrypt(__UNCONST(data), (des_cblock *)dest, *ksp, 1);
1.3 deberg 86: free(ksp, M_SMBTEMP);
1.1 deberg 87: }
88: #endif
89:
90:
91: int
1.3 deberg 92: smb_encrypt(const u_char *apwd, u_char *C8, u_char *RN)
1.1 deberg 93: {
1.3 deberg 94: #ifdef NETSMBCRYPTO
95: u_char *p, *P14, *S21;
1.1 deberg 96:
1.3 deberg 97: p = malloc(14 + 21, M_SMBTEMP, M_WAITOK);
98: bzero(p, 14 + 21);
99: P14 = p;
100: S21 = p + 14;
1.1 deberg 101: bcopy(apwd, P14, min(14, strlen(apwd)));
102: /*
103: * S21 = concat(Ex(P14, N8), zeros(5));
104: */
105: smb_E(P14, N8, S21);
106: smb_E(P14 + 7, N8, S21 + 8);
107:
108: smb_E(S21, C8, RN);
109: smb_E(S21 + 7, C8, RN + 8);
110: smb_E(S21 + 14, C8, RN + 16);
1.3 deberg 111: free(p, M_SMBTEMP);
1.1 deberg 112: return 0;
113: #else
114: SMBERROR("password encryption is not available\n");
115: bzero(RN, 24);
116: return EAUTH;
117: #endif
118: }
119:
120: int
1.3 deberg 121: smb_ntencrypt(const u_char *apwd, u_char *C8, u_char *RN)
1.1 deberg 122: {
1.3 deberg 123: #ifdef NETSMBCRYPTO
1.1 deberg 124: u_char S21[21];
125: u_int16_t *unipwd;
1.3 deberg 126: MD4_CTX *ctxp;
1.1 deberg 127: int len;
128:
129: len = strlen(apwd);
1.3 deberg 130: unipwd = malloc((len + 1) * sizeof(u_int16_t), M_SMBTEMP, M_WAITOK);
1.1 deberg 131: /*
132: * S21 = concat(MD4(U(apwd)), zeros(5));
133: */
134: smb_strtouni(unipwd, apwd);
1.3 deberg 135: ctxp = malloc(sizeof(MD4_CTX), M_SMBTEMP, M_WAITOK);
136: MD4Init(ctxp);
137: MD4Update(ctxp, (u_char*)unipwd, len * sizeof(u_int16_t));
1.1 deberg 138: free(unipwd, M_SMBTEMP);
139: bzero(S21, 21);
1.3 deberg 140: MD4Final(S21, ctxp);
141: free(ctxp, M_SMBTEMP);
1.1 deberg 142:
143: smb_E(S21, C8, RN);
144: smb_E(S21 + 7, C8, RN + 8);
145: smb_E(S21 + 14, C8, RN + 16);
146: return 0;
147: #else
148: SMBERROR("password encryption is not available\n");
149: bzero(RN, 24);
150: return EAUTH;
151: #endif
152: }
153:
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