--- /dev/null
+/*
+ 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
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <linux/module.h>
+#include <linux/slab.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"
+
+#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)))
+
+static void
+str_to_key(unsigned char *str, unsigned char *key)
+{
+ int i;
+
+ key[0] = str[0] >> 1;
+ key[1] = ((str[0] & 0x01) << 6) | (str[1] >> 2);
+ key[2] = ((str[1] & 0x03) << 5) | (str[2] >> 3);
+ key[3] = ((str[2] & 0x07) << 4) | (str[3] >> 4);
+ key[4] = ((str[3] & 0x0F) << 3) | (str[4] >> 5);
+ key[5] = ((str[4] & 0x1F) << 2) | (str[5] >> 6);
+ key[6] = ((str[5] & 0x3F) << 1) | (str[6] >> 7);
+ key[7] = str[6] & 0x7F;
+ for (i = 0; i < 8; i++)
+ key[i] = (key[i] << 1);
+}
+
+static int
+smbhash(unsigned char *out, const unsigned char *in, unsigned char *key)
+{
+ int rc;
+ unsigned char key2[8];
+ struct crypto_blkcipher *tfm_des;
+ struct scatterlist sgin, sgout;
+ struct blkcipher_desc desc;
+
+ str_to_key(key, key2);
+
+ tfm_des = crypto_alloc_blkcipher("ecb(des)", 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(tfm_des)) {
+ rc = PTR_ERR(tfm_des);
+ cifs_dbg(VFS, "could not allocate des crypto API\n");
+ goto smbhash_err;
+ }
+
+ desc.tfm = tfm_des;
+
+ crypto_blkcipher_setkey(tfm_des, key2, 8);
+
+ sg_init_one(&sgin, in, 8);
+ sg_init_one(&sgout, out, 8);
+
+ rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, 8);
+ if (rc)
+ cifs_dbg(VFS, "could not encrypt crypt key rc: %d\n", rc);
+
+ crypto_free_blkcipher(tfm_des);
+smbhash_err:
+ return rc;
+}
+
+static int
+E_P16(unsigned char *p14, unsigned char *p16)
+{
+ int rc;
+ unsigned char sp8[8] =
+ { 0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 };
+
+ rc = smbhash(p16, sp8, p14);
+ if (rc)
+ return rc;
+ rc = smbhash(p16 + 8, sp8, p14 + 7);
+ return rc;
+}
+
+static int
+E_P24(unsigned char *p21, const unsigned char *c8, unsigned char *p24)
+{
+ int rc;
+
+ rc = smbhash(p24, c8, p21);
+ if (rc)
+ return rc;
+ rc = smbhash(p24 + 8, c8, p21 + 7);
+ if (rc)
+ return rc;
+ rc = smbhash(p24 + 16, c8, p21 + 14);
+ return rc;
+}
+
+/* produce a md4 message digest from data of length n bytes */
+int
+mdfour(unsigned char *md4_hash, unsigned char *link_str, int link_len)
+{
+ int rc;
+ unsigned int size;
+ struct crypto_shash *md4;
+ struct sdesc *sdescmd4;
+
+ md4 = crypto_alloc_shash("md4", 0, 0);
+ if (IS_ERR(md4)) {
+ rc = PTR_ERR(md4);
+ cifs_dbg(VFS, "%s: Crypto md4 allocation error %d\n",
+ __func__, rc);
+ return rc;
+ }
+ size = sizeof(struct shash_desc) + crypto_shash_descsize(md4);
+ sdescmd4 = kmalloc(size, GFP_KERNEL);
+ if (!sdescmd4) {
+ rc = -ENOMEM;
+ goto mdfour_err;
+ }
+ sdescmd4->shash.tfm = md4;
+ sdescmd4->shash.flags = 0x0;
+
+ rc = crypto_shash_init(&sdescmd4->shash);
+ if (rc) {
+ cifs_dbg(VFS, "%s: Could not init md4 shash\n", __func__);
+ goto mdfour_err;
+ }
+ rc = crypto_shash_update(&sdescmd4->shash, link_str, link_len);
+ if (rc) {
+ cifs_dbg(VFS, "%s: Could not update with link_str\n", __func__);
+ goto mdfour_err;
+ }
+ rc = crypto_shash_final(&sdescmd4->shash, md4_hash);
+ if (rc)
+ cifs_dbg(VFS, "%s: Could not generate md4 hash\n", __func__);
+
+mdfour_err:
+ crypto_free_shash(md4);
+ kfree(sdescmd4);
+
+ return rc;
+}
+
+/*
+ This implements the X/Open SMB password encryption
+ It takes a password, a 8 byte "crypt key" and puts 24 bytes of
+ encrypted password into p24 */
+/* Note that password must be uppercased and null terminated */
+int
+SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24)
+{
+ int rc;
+ unsigned char p14[14], p16[16], p21[21];
+
+ memset(p14, '\0', 14);
+ memset(p16, '\0', 16);
+ memset(p21, '\0', 21);
+
+ memcpy(p14, passwd, 14);
+ rc = E_P16(p14, p16);
+ if (rc)
+ return rc;
+
+ memcpy(p21, p16, 16);
+ rc = E_P24(p21, c8, p24);
+
+ 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;
+}
+
+/* Does the NT MD4 hash then des encryption. */
+int
+SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24,
+ const struct nls_table *codepage)
+{
+ int rc;
+ unsigned char p16[16], p21[21];
+
+ memset(p16, '\0', 16);
+ memset(p21, '\0', 21);
+
+ rc = E_md4hash(passwd, p16, codepage);
+ if (rc) {
+ cifs_dbg(FYI, "%s Can't generate NT hash, error: %d\n",
+ __func__, rc);
+ return rc;
+ }
+ memcpy(p21, p16, 16);
+ rc = E_P24(p21, c8, p24);
+ return rc;
+}
Code Review / kvmfornfv.git / blobdiff