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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - fs/cifs/smbencrypt.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
3 Unix SMB/Netbios implementation.
5 SMB parameters and setup
6 Copyright (C) Andrew Tridgell 1992-2000
7 Copyright (C) Luke Kenneth Casson Leighton 1996-2000
8 Modified by Jeremy Allison 1995.
9 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003
10 Modified by Steve French (sfrench@us.ibm.com) 2002-2003
14 #include <linux/module.h>
15 #include <linux/slab.h>
16 #include <linux/fips.h>
18 #include <linux/string.h>
19 #include <linux/kernel.h>
20 #include <linux/random.h>
21 #include "cifs_fs_sb.h"
22 #include "cifs_unicode.h"
25 #include "cifs_debug.h"
26 #include "cifsproto.h"
27 #include "../cifs_common/md4.h"
36 /* following came from the other byteorder.h to avoid include conflicts */
37 #define CVAL(buf,pos) (((unsigned char *)(buf))[pos])
38 #define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8)
39 #define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val)))
41 /* produce a md4 message digest from data of length n bytes */
43 mdfour(unsigned char *md4_hash
, unsigned char *link_str
, int link_len
)
48 rc
= cifs_md4_init(&mctx
);
50 cifs_dbg(VFS
, "%s: Could not init MD4\n", __func__
);
53 rc
= cifs_md4_update(&mctx
, link_str
, link_len
);
55 cifs_dbg(VFS
, "%s: Could not update MD4\n", __func__
);
58 rc
= cifs_md4_final(&mctx
, md4_hash
);
60 cifs_dbg(VFS
, "%s: Could not finalize MD4\n", __func__
);
68 * Creates the MD4 Hash of the users password in NT UNICODE.
72 E_md4hash(const unsigned char *passwd
, unsigned char *p16
,
73 const struct nls_table
*codepage
)
79 /* Password cannot be longer than 128 characters */
80 if (passwd
) /* Password must be converted to NT unicode */
81 len
= cifs_strtoUTF16(wpwd
, passwd
, 128, codepage
);
84 *wpwd
= 0; /* Ensure string is null terminated */
87 rc
= mdfour(p16
, (unsigned char *) wpwd
, len
* sizeof(__le16
));
88 memzero_explicit(wpwd
, sizeof(wpwd
));