154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
/* $NetBSD: smb_crypt.c,v 1.7 2005/05/29 21:26:27 christos Exp $ */
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/*
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* Copyright (c) 2000-2001, Boris Popov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Boris Popov.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* FreeBSD: src/sys/netsmb/smb_crypt.c,v 1.3 2001/08/21 08:07:18 bp Exp
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: smb_crypt.c,v 1.7 2005/05/29 21:26:27 christos Exp $");
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#include <sys/param.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/proc.h>
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#include <sys/fcntl.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <sys/md4.h>
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#include <netsmb/smb.h>
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#include <netsmb/smb_conn.h>
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#include <netsmb/smb_subr.h>
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#include <netsmb/smb_dev.h>
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/* always enable */
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#define NETSMBCRYPTO
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#ifdef NETSMBCRYPTO
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#include <crypto/des/des.h>
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static const u_char N8[] = {0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25};
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static void
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smb_E(const u_char *key, const u_char *data, u_char *dest)
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{
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des_key_schedule *ksp;
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u_char kk[8];
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kk[0] = key[0] & 0xfe;
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kk[1] = key[0] << 7 | (key[1] >> 1 & 0xfe);
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kk[2] = key[1] << 6 | (key[2] >> 2 & 0xfe);
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kk[3] = key[2] << 5 | (key[3] >> 3 & 0xfe);
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kk[4] = key[3] << 4 | (key[4] >> 4 & 0xfe);
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kk[5] = key[4] << 3 | (key[5] >> 5 & 0xfe);
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kk[6] = key[5] << 2 | (key[6] >> 6 & 0xfe);
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kk[7] = key[6] << 1;
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ksp = malloc(sizeof(des_key_schedule), M_SMBTEMP, M_WAITOK);
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des_set_key((des_cblock *)kk, *ksp);
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/* XXXUNCONST */
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des_ecb_encrypt(__UNCONST(data), (des_cblock *)dest, *ksp, 1);
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free(ksp, M_SMBTEMP);
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}
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#endif
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int
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smb_encrypt(const u_char *apwd, u_char *C8, u_char *RN)
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{
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#ifdef NETSMBCRYPTO
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u_char *p, *P14, *S21;
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p = malloc(14 + 21, M_SMBTEMP, M_WAITOK);
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bzero(p, 14 + 21);
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P14 = p;
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S21 = p + 14;
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bcopy(apwd, P14, min(14, strlen(apwd)));
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/*
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* S21 = concat(Ex(P14, N8), zeros(5));
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*/
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smb_E(P14, N8, S21);
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smb_E(P14 + 7, N8, S21 + 8);
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smb_E(S21, C8, RN);
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smb_E(S21 + 7, C8, RN + 8);
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smb_E(S21 + 14, C8, RN + 16);
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free(p, M_SMBTEMP);
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return 0;
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#else
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SMBERROR("password encryption is not available\n");
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bzero(RN, 24);
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return EAUTH;
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#endif
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}
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int
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smb_ntencrypt(const u_char *apwd, u_char *C8, u_char *RN)
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{
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#ifdef NETSMBCRYPTO
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u_char S21[21];
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u_int16_t *unipwd;
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MD4_CTX *ctxp;
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int len;
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len = strlen(apwd);
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unipwd = malloc((len + 1) * sizeof(u_int16_t), M_SMBTEMP, M_WAITOK);
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/*
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* S21 = concat(MD4(U(apwd)), zeros(5));
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*/
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smb_strtouni(unipwd, apwd);
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ctxp = malloc(sizeof(MD4_CTX), M_SMBTEMP, M_WAITOK);
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MD4Init(ctxp);
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MD4Update(ctxp, (u_char*)unipwd, len * sizeof(u_int16_t));
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free(unipwd, M_SMBTEMP);
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bzero(S21, 21);
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MD4Final(S21, ctxp);
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free(ctxp, M_SMBTEMP);
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smb_E(S21, C8, RN);
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smb_E(S21 + 7, C8, RN + 8);
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smb_E(S21 + 14, C8, RN + 16);
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return 0;
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#else
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SMBERROR("password encryption is not available\n");
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bzero(RN, 24);
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return EAUTH;
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#endif
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}
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