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Diffstat (limited to 'fs/smb/client/smbencrypt.c')
-rw-r--r--fs/smb/client/smbencrypt.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/fs/smb/client/smbencrypt.c b/fs/smb/client/smbencrypt.c
new file mode 100644
index 000000000000..f0ce26414f17
--- /dev/null
+++ b/fs/smb/client/smbencrypt.c
@@ -0,0 +1,91 @@
+// 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;
+}