>> 1 // SPDX-License-Identifier: GPL-2.0-or-later
1 /* 2 /*
2 Unix SMB/Netbios implementation. 3 Unix SMB/Netbios implementation.
3 Version 1.9. 4 Version 1.9.
4 SMB parameters and setup 5 SMB parameters and setup
5 Copyright (C) Andrew Tridgell 1992-2000 6 Copyright (C) Andrew Tridgell 1992-2000
6 Copyright (C) Luke Kenneth Casson Leighton 7 Copyright (C) Luke Kenneth Casson Leighton 1996-2000
7 Modified by Jeremy Allison 1995. 8 Modified by Jeremy Allison 1995.
8 Copyright (C) Andrew Bartlett <abartlet@sam 9 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003
9 Modified by Steve French (sfrench@us.ibm.co 10 Modified by Steve French (sfrench@us.ibm.com) 2002-2003
10 11
11 This program is free software; you can redi <<
12 it under the terms of the GNU General Publi <<
13 the Free Software Foundation; either versio <<
14 (at your option) any later version. <<
15 <<
16 This program is distributed in the hope tha <<
17 but WITHOUT ANY WARRANTY; without even the <<
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR <<
19 GNU General Public License for more details <<
20 <<
21 You should have received a copy of the GNU <<
22 along with this program; if not, write to t <<
23 Foundation, Inc., 675 Mass Ave, Cambridge, <<
24 */ 12 */
25 13
>> 14 #include <linux/crypto.h>
26 #include <linux/module.h> 15 #include <linux/module.h>
27 #include <linux/slab.h> 16 #include <linux/slab.h>
28 #include <linux/fs.h> 17 #include <linux/fs.h>
29 #include <linux/string.h> 18 #include <linux/string.h>
30 #include <linux/kernel.h> 19 #include <linux/kernel.h>
31 #include <linux/random.h> 20 #include <linux/random.h>
>> 21 #include "cifs_fs_sb.h"
32 #include "cifs_unicode.h" 22 #include "cifs_unicode.h"
33 #include "cifspdu.h" 23 #include "cifspdu.h"
34 #include "cifsglob.h" 24 #include "cifsglob.h"
35 #include "cifs_debug.h" 25 #include "cifs_debug.h"
36 #include "cifsproto.h" 26 #include "cifsproto.h"
37 27
38 #ifndef false 28 #ifndef false
39 #define false 0 29 #define false 0
40 #endif 30 #endif
41 #ifndef true 31 #ifndef true
42 #define true 1 32 #define true 1
43 #endif 33 #endif
44 34
45 /* following came from the other byteorder.h t 35 /* following came from the other byteorder.h to avoid include conflicts */
46 #define CVAL(buf,pos) (((unsigned char *)(buf) 36 #define CVAL(buf,pos) (((unsigned char *)(buf))[pos])
47 #define SSVALX(buf,pos,val) (CVAL(buf,pos)=(va 37 #define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8)
48 #define SSVAL(buf,pos,val) SSVALX((buf),(pos), 38 #define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val)))
49 39
50 static void 40 static void
51 str_to_key(unsigned char *str, unsigned char * 41 str_to_key(unsigned char *str, unsigned char *key)
52 { 42 {
53 int i; 43 int i;
54 44
55 key[0] = str[0] >> 1; 45 key[0] = str[0] >> 1;
56 key[1] = ((str[0] & 0x01) << 6) | (str 46 key[1] = ((str[0] & 0x01) << 6) | (str[1] >> 2);
57 key[2] = ((str[1] & 0x03) << 5) | (str 47 key[2] = ((str[1] & 0x03) << 5) | (str[2] >> 3);
58 key[3] = ((str[2] & 0x07) << 4) | (str 48 key[3] = ((str[2] & 0x07) << 4) | (str[3] >> 4);
59 key[4] = ((str[3] & 0x0F) << 3) | (str 49 key[4] = ((str[3] & 0x0F) << 3) | (str[4] >> 5);
60 key[5] = ((str[4] & 0x1F) << 2) | (str 50 key[5] = ((str[4] & 0x1F) << 2) | (str[5] >> 6);
61 key[6] = ((str[5] & 0x3F) << 1) | (str 51 key[6] = ((str[5] & 0x3F) << 1) | (str[6] >> 7);
62 key[7] = str[6] & 0x7F; 52 key[7] = str[6] & 0x7F;
63 for (i = 0; i < 8; i++) 53 for (i = 0; i < 8; i++)
64 key[i] = (key[i] << 1); 54 key[i] = (key[i] << 1);
65 } 55 }
66 56
67 static int 57 static int
68 smbhash(unsigned char *out, const unsigned cha 58 smbhash(unsigned char *out, const unsigned char *in, unsigned char *key)
69 { 59 {
70 int rc; <<
71 unsigned char key2[8]; 60 unsigned char key2[8];
72 struct crypto_blkcipher *tfm_des; !! 61 struct crypto_cipher *tfm_des;
73 struct scatterlist sgin, sgout; <<
74 struct blkcipher_desc desc; <<
75 62
76 str_to_key(key, key2); 63 str_to_key(key, key2);
77 64
78 tfm_des = crypto_alloc_blkcipher("ecb( !! 65 tfm_des = crypto_alloc_cipher("des", 0, 0);
79 if (IS_ERR(tfm_des)) { 66 if (IS_ERR(tfm_des)) {
80 rc = PTR_ERR(tfm_des); <<
81 cifs_dbg(VFS, "could not alloc 67 cifs_dbg(VFS, "could not allocate des crypto API\n");
82 goto smbhash_err; !! 68 return PTR_ERR(tfm_des);
83 } 69 }
84 70
85 desc.tfm = tfm_des; !! 71 crypto_cipher_setkey(tfm_des, key2, 8);
86 !! 72 crypto_cipher_encrypt_one(tfm_des, out, in);
87 crypto_blkcipher_setkey(tfm_des, key2, !! 73 crypto_free_cipher(tfm_des);
88 <<
89 sg_init_one(&sgin, in, 8); <<
90 sg_init_one(&sgout, out, 8); <<
91 74
92 rc = crypto_blkcipher_encrypt(&desc, & !! 75 return 0;
93 if (rc) <<
94 cifs_dbg(VFS, "could not encry <<
95 <<
96 crypto_free_blkcipher(tfm_des); <<
97 smbhash_err: <<
98 return rc; <<
99 } 76 }
100 77
101 static int 78 static int
102 E_P16(unsigned char *p14, unsigned char *p16) 79 E_P16(unsigned char *p14, unsigned char *p16)
103 { 80 {
104 int rc; 81 int rc;
105 unsigned char sp8[8] = 82 unsigned char sp8[8] =
106 { 0x4b, 0x47, 0x53, 0x21, 0x40, 0x 83 { 0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 };
107 84
108 rc = smbhash(p16, sp8, p14); 85 rc = smbhash(p16, sp8, p14);
109 if (rc) 86 if (rc)
110 return rc; 87 return rc;
111 rc = smbhash(p16 + 8, sp8, p14 + 7); 88 rc = smbhash(p16 + 8, sp8, p14 + 7);
112 return rc; 89 return rc;
113 } 90 }
114 91
115 static int 92 static int
116 E_P24(unsigned char *p21, const unsigned char 93 E_P24(unsigned char *p21, const unsigned char *c8, unsigned char *p24)
117 { 94 {
118 int rc; 95 int rc;
119 96
120 rc = smbhash(p24, c8, p21); 97 rc = smbhash(p24, c8, p21);
121 if (rc) 98 if (rc)
122 return rc; 99 return rc;
123 rc = smbhash(p24 + 8, c8, p21 + 7); 100 rc = smbhash(p24 + 8, c8, p21 + 7);
124 if (rc) 101 if (rc)
125 return rc; 102 return rc;
126 rc = smbhash(p24 + 16, c8, p21 + 14); 103 rc = smbhash(p24 + 16, c8, p21 + 14);
127 return rc; 104 return rc;
128 } 105 }
129 106
130 /* produce a md4 message digest from data of l 107 /* produce a md4 message digest from data of length n bytes */
131 int 108 int
132 mdfour(unsigned char *md4_hash, unsigned char 109 mdfour(unsigned char *md4_hash, unsigned char *link_str, int link_len)
133 { 110 {
134 int rc; 111 int rc;
135 unsigned int size; !! 112 struct crypto_shash *md4 = NULL;
136 struct crypto_shash *md4; !! 113 struct sdesc *sdescmd4 = NULL;
137 struct sdesc *sdescmd4; !! 114
138 !! 115 rc = cifs_alloc_hash("md4", &md4, &sdescmd4);
139 md4 = crypto_alloc_shash("md4", 0, 0); !! 116 if (rc)
140 if (IS_ERR(md4)) { <<
141 rc = PTR_ERR(md4); <<
142 cifs_dbg(VFS, "%s: Crypto md4 <<
143 __func__, rc); <<
144 return rc; <<
145 } <<
146 size = sizeof(struct shash_desc) + cry <<
147 sdescmd4 = kmalloc(size, GFP_KERNEL); <<
148 if (!sdescmd4) { <<
149 rc = -ENOMEM; <<
150 goto mdfour_err; 117 goto mdfour_err;
151 } <<
152 sdescmd4->shash.tfm = md4; <<
153 sdescmd4->shash.flags = 0x0; <<
154 118
155 rc = crypto_shash_init(&sdescmd4->shas 119 rc = crypto_shash_init(&sdescmd4->shash);
156 if (rc) { 120 if (rc) {
157 cifs_dbg(VFS, "%s: Could not i 121 cifs_dbg(VFS, "%s: Could not init md4 shash\n", __func__);
158 goto mdfour_err; 122 goto mdfour_err;
159 } 123 }
160 rc = crypto_shash_update(&sdescmd4->sh 124 rc = crypto_shash_update(&sdescmd4->shash, link_str, link_len);
161 if (rc) { 125 if (rc) {
162 cifs_dbg(VFS, "%s: Could not u 126 cifs_dbg(VFS, "%s: Could not update with link_str\n", __func__);
163 goto mdfour_err; 127 goto mdfour_err;
164 } 128 }
165 rc = crypto_shash_final(&sdescmd4->sha 129 rc = crypto_shash_final(&sdescmd4->shash, md4_hash);
166 if (rc) 130 if (rc)
167 cifs_dbg(VFS, "%s: Could not g 131 cifs_dbg(VFS, "%s: Could not generate md4 hash\n", __func__);
168 132
169 mdfour_err: 133 mdfour_err:
170 crypto_free_shash(md4); !! 134 cifs_free_hash(&md4, &sdescmd4);
171 kfree(sdescmd4); <<
172 <<
173 return rc; 135 return rc;
174 } 136 }
175 137
176 /* 138 /*
177 This implements the X/Open SMB password enc 139 This implements the X/Open SMB password encryption
178 It takes a password, a 8 byte "crypt key" a 140 It takes a password, a 8 byte "crypt key" and puts 24 bytes of
179 encrypted password into p24 */ 141 encrypted password into p24 */
180 /* Note that password must be uppercased and n 142 /* Note that password must be uppercased and null terminated */
181 int 143 int
182 SMBencrypt(unsigned char *passwd, const unsign 144 SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24)
183 { 145 {
184 int rc; 146 int rc;
185 unsigned char p14[14], p16[16], p21[21 147 unsigned char p14[14], p16[16], p21[21];
186 148
187 memset(p14, '\0', 14); 149 memset(p14, '\0', 14);
188 memset(p16, '\0', 16); 150 memset(p16, '\0', 16);
189 memset(p21, '\0', 21); 151 memset(p21, '\0', 21);
190 152
191 memcpy(p14, passwd, 14); 153 memcpy(p14, passwd, 14);
192 rc = E_P16(p14, p16); 154 rc = E_P16(p14, p16);
193 if (rc) 155 if (rc)
194 return rc; 156 return rc;
195 157
196 memcpy(p21, p16, 16); 158 memcpy(p21, p16, 16);
197 rc = E_P24(p21, c8, p24); 159 rc = E_P24(p21, c8, p24);
198 160
199 return rc; 161 return rc;
200 } 162 }
201 163
202 /* 164 /*
203 * Creates the MD4 Hash of the users password 165 * Creates the MD4 Hash of the users password in NT UNICODE.
204 */ 166 */
205 167
206 int 168 int
207 E_md4hash(const unsigned char *passwd, unsigne 169 E_md4hash(const unsigned char *passwd, unsigned char *p16,
208 const struct nls_table *codepage) 170 const struct nls_table *codepage)
209 { 171 {
210 int rc; 172 int rc;
211 int len; 173 int len;
212 __le16 wpwd[129]; 174 __le16 wpwd[129];
213 175
214 /* Password cannot be longer than 128 176 /* Password cannot be longer than 128 characters */
215 if (passwd) /* Password must be conver 177 if (passwd) /* Password must be converted to NT unicode */
216 len = cifs_strtoUTF16(wpwd, pa 178 len = cifs_strtoUTF16(wpwd, passwd, 128, codepage);
217 else { 179 else {
218 len = 0; 180 len = 0;
219 *wpwd = 0; /* Ensure string is 181 *wpwd = 0; /* Ensure string is null terminated */
220 } 182 }
221 183
222 rc = mdfour(p16, (unsigned char *) wpw 184 rc = mdfour(p16, (unsigned char *) wpwd, len * sizeof(__le16));
223 memset(wpwd, 0, 129 * sizeof(__le16)); !! 185 memzero_explicit(wpwd, sizeof(wpwd));
224 186
225 return rc; 187 return rc;
226 } 188 }
227 189
228 /* Does the NT MD4 hash then des encryption. * 190 /* Does the NT MD4 hash then des encryption. */
229 int 191 int
230 SMBNTencrypt(unsigned char *passwd, unsigned c 192 SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24,
231 const struct nls_table *codepa 193 const struct nls_table *codepage)
232 { 194 {
233 int rc; 195 int rc;
234 unsigned char p16[16], p21[21]; 196 unsigned char p16[16], p21[21];
235 197
236 memset(p16, '\0', 16); 198 memset(p16, '\0', 16);
237 memset(p21, '\0', 21); 199 memset(p21, '\0', 21);
238 200
239 rc = E_md4hash(passwd, p16, codepage); 201 rc = E_md4hash(passwd, p16, codepage);
240 if (rc) { 202 if (rc) {
241 cifs_dbg(FYI, "%s Can't genera 203 cifs_dbg(FYI, "%s Can't generate NT hash, error: %d\n",
242 __func__, rc); 204 __func__, rc);
243 return rc; 205 return rc;
244 } 206 }
245 memcpy(p21, p16, 16); 207 memcpy(p21, p16, 16);
246 rc = E_P24(p21, c8, p24); 208 rc = E_P24(p21, c8, p24);
247 return rc; 209 return rc;
248 } 210 }
249 211
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