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