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// SPDX-License-Identifier: GPL-2.0-or-later
/*
Unix SMB/Netbios implementation.
Version 1.9.
SMB parameters and setup
Copyright (C) Andrew Tridgell 1992-2000
Copyright (C) Luke Kenneth Casson Leighton 1996-2000
Modified by Jeremy Allison 1995.
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003
Modified by Steve French (sfrench@us.ibm.com) 2002-2003
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/fips.h>
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/random.h>
#include "cifs_fs_sb.h"
#include "cifs_unicode.h"
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifs_debug.h"
#include "cifsproto.h"
#include "../common/md4.h"
#ifndef false
#define false 0
#endif
#ifndef true
#define true 1
#endif
/* following came from the other byteorder.h to avoid include conflicts */
#define CVAL(buf,pos) (((unsigned char *)(buf))[pos])
#define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8)
#define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val)))
/* produce a md4 message digest from data of length n bytes */
static int
mdfour(unsigned char *md4_hash, unsigned char *link_str, int link_len)
{
int rc;
struct md4_ctx mctx;
rc = cifs_md4_init(&mctx);
if (rc) {
cifs_dbg(VFS, "%s: Could not init MD4\n", __func__);
goto mdfour_err;
}
rc = cifs_md4_update(&mctx, link_str, link_len);
if (rc) {
cifs_dbg(VFS, "%s: Could not update MD4\n", __func__);
goto mdfour_err;
}
rc = cifs_md4_final(&mctx, md4_hash);
if (rc)
cifs_dbg(VFS, "%s: Could not finalize MD4\n", __func__);
mdfour_err:
return rc;
}
/*
* Creates the MD4 Hash of the users password in NT UNICODE.
*/
int
E_md4hash(const unsigned char *passwd, unsigned char *p16,
const struct nls_table *codepage)
{
int rc;
int len;
__le16 wpwd[129];
/* Password cannot be longer than 128 characters */
if (passwd) /* Password must be converted to NT unicode */
len = cifs_strtoUTF16(wpwd, passwd, 128, codepage);
else {
len = 0;
*wpwd = 0; /* Ensure string is null terminated */
}
rc = mdfour(p16, (unsigned char *) wpwd, len * sizeof(__le16));
memzero_explicit(wpwd, sizeof(wpwd));
return rc;
}
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