Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/cifsencrypt.c |
| 3 | * |
Steve French | 12b3b8f | 2006-02-09 21:12:47 +0000 | [diff] [blame] | 4 | * Copyright (C) International Business Machines Corp., 2005,2006 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Author(s): Steve French (sfrench@us.ibm.com) |
| 6 | * |
| 7 | * This library is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU Lesser General Public License as published |
| 9 | * by the Free Software Foundation; either version 2.1 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 15 | * the GNU Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public License |
| 18 | * along with this library; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
| 22 | #include <linux/fs.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "cifspdu.h" |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 25 | #include "cifsglob.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "cifs_debug.h" |
| 27 | #include "md5.h" |
| 28 | #include "cifs_unicode.h" |
| 29 | #include "cifsproto.h" |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 30 | #include "ntlmssp.h" |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 31 | #include <linux/ctype.h> |
Steve French | 6d027cf | 2006-06-05 16:26:05 +0000 | [diff] [blame] | 32 | #include <linux/random.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 34 | /* Calculate and return the CIFS signature based on the mac key and SMB PDU */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | /* the 16 byte signature must be allocated by the caller */ |
| 36 | /* Note we only use the 1st eight bytes */ |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 37 | /* Note that the smb header signature field on input contains the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | sequence number before this function is called */ |
| 39 | |
| 40 | extern void mdfour(unsigned char *out, unsigned char *in, int n); |
| 41 | extern void E_md4hash(const unsigned char *passwd, unsigned char *p16); |
Jeff Layton | 4e53a3f | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 42 | extern void SMBencrypt(unsigned char *passwd, const unsigned char *c8, |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 43 | unsigned char *p24); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 44 | |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 45 | static int cifs_calculate_signature(const struct smb_hdr *cifs_pdu, |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 46 | struct TCP_Server_Info *server, char *signature) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | { |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 48 | struct MD5Context context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 50 | if (cifs_pdu == NULL || signature == NULL || server == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | return -EINVAL; |
| 52 | |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 53 | cifs_MD5_init(&context); |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 54 | cifs_MD5_update(&context, server->session_key.response, |
| 55 | server->session_key.len); |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 56 | cifs_MD5_update(&context, cifs_pdu->Protocol, cifs_pdu->smb_buf_length); |
Steve French | b609f06 | 2007-07-09 07:55:14 +0000 | [diff] [blame] | 57 | |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 58 | cifs_MD5_final(signature, &context); |
Steve French | 56234e2 | 2010-09-08 20:57:05 +0000 | [diff] [blame] | 59 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | } |
| 61 | |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 62 | int cifs_sign_smb(struct smb_hdr *cifs_pdu, struct TCP_Server_Info *server, |
| 63 | __u32 *pexpected_response_sequence_number) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | { |
| 65 | int rc = 0; |
| 66 | char smb_signature[20]; |
| 67 | |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 68 | if ((cifs_pdu == NULL) || (server == NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | return -EINVAL; |
| 70 | |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 71 | if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | return rc; |
| 73 | |
| 74 | spin_lock(&GlobalMid_Lock); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 75 | cifs_pdu->Signature.Sequence.SequenceNumber = |
| 76 | cpu_to_le32(server->sequence_number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | cifs_pdu->Signature.Sequence.Reserved = 0; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 78 | |
Steve French | ad009ac | 2005-04-28 22:41:05 -0700 | [diff] [blame] | 79 | *pexpected_response_sequence_number = server->sequence_number++; |
| 80 | server->sequence_number++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | spin_unlock(&GlobalMid_Lock); |
| 82 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 83 | rc = cifs_calculate_signature(cifs_pdu, server, smb_signature); |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 84 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | memset(cifs_pdu->Signature.SecuritySignature, 0, 8); |
| 86 | else |
| 87 | memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8); |
| 88 | |
| 89 | return rc; |
| 90 | } |
| 91 | |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 92 | static int cifs_calc_signature2(const struct kvec *iov, int n_vec, |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 93 | struct TCP_Server_Info *server, char *signature) |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 94 | { |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 95 | struct MD5Context context; |
Steve French | e9917a0 | 2006-03-31 21:22:00 +0000 | [diff] [blame] | 96 | int i; |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 97 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 98 | if (iov == NULL || signature == NULL || server == NULL) |
Steve French | e9917a0 | 2006-03-31 21:22:00 +0000 | [diff] [blame] | 99 | return -EINVAL; |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 100 | |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 101 | cifs_MD5_init(&context); |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 102 | cifs_MD5_update(&context, server->session_key.response, |
| 103 | server->session_key.len); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 104 | for (i = 0; i < n_vec; i++) { |
Jeff Layton | 745542e | 2007-11-03 04:34:04 +0000 | [diff] [blame] | 105 | if (iov[i].iov_len == 0) |
| 106 | continue; |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 107 | if (iov[i].iov_base == NULL) { |
Steve French | 56234e2 | 2010-09-08 20:57:05 +0000 | [diff] [blame] | 108 | cERROR(1, "null iovec entry"); |
Steve French | e9917a0 | 2006-03-31 21:22:00 +0000 | [diff] [blame] | 109 | return -EIO; |
Jeff Layton | 745542e | 2007-11-03 04:34:04 +0000 | [diff] [blame] | 110 | } |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 111 | /* The first entry includes a length field (which does not get |
Steve French | e9917a0 | 2006-03-31 21:22:00 +0000 | [diff] [blame] | 112 | signed that occupies the first 4 bytes before the header */ |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 113 | if (i == 0) { |
Steve French | 63d2583 | 2007-11-05 21:46:10 +0000 | [diff] [blame] | 114 | if (iov[0].iov_len <= 8) /* cmd field at offset 9 */ |
Steve French | e9917a0 | 2006-03-31 21:22:00 +0000 | [diff] [blame] | 115 | break; /* nothing to sign or corrupt header */ |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 116 | cifs_MD5_update(&context, iov[0].iov_base+4, |
| 117 | iov[0].iov_len-4); |
Steve French | e9917a0 | 2006-03-31 21:22:00 +0000 | [diff] [blame] | 118 | } else |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 119 | cifs_MD5_update(&context, iov[i].iov_base, iov[i].iov_len); |
Steve French | e9917a0 | 2006-03-31 21:22:00 +0000 | [diff] [blame] | 120 | } |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 121 | |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 122 | cifs_MD5_final(signature, &context); |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 123 | |
Steve French | 56234e2 | 2010-09-08 20:57:05 +0000 | [diff] [blame] | 124 | return 0; |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 125 | } |
| 126 | |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 127 | |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 128 | int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *server, |
Steve French | 63d2583 | 2007-11-05 21:46:10 +0000 | [diff] [blame] | 129 | __u32 *pexpected_response_sequence_number) |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 130 | { |
| 131 | int rc = 0; |
| 132 | char smb_signature[20]; |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 133 | struct smb_hdr *cifs_pdu = iov[0].iov_base; |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 134 | |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 135 | if ((cifs_pdu == NULL) || (server == NULL)) |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 136 | return -EINVAL; |
| 137 | |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 138 | if ((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0) |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 139 | return rc; |
| 140 | |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 141 | spin_lock(&GlobalMid_Lock); |
| 142 | cifs_pdu->Signature.Sequence.SequenceNumber = |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 143 | cpu_to_le32(server->sequence_number); |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 144 | cifs_pdu->Signature.Sequence.Reserved = 0; |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 145 | |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 146 | *pexpected_response_sequence_number = server->sequence_number++; |
| 147 | server->sequence_number++; |
| 148 | spin_unlock(&GlobalMid_Lock); |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 149 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 150 | rc = cifs_calc_signature2(iov, n_vec, server, smb_signature); |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 151 | if (rc) |
| 152 | memset(cifs_pdu->Signature.SecuritySignature, 0, 8); |
| 153 | else |
| 154 | memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8); |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 155 | |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 156 | return rc; |
Steve French | 84afc29 | 2005-12-02 13:32:45 -0800 | [diff] [blame] | 157 | } |
| 158 | |
Steve French | b609f06 | 2007-07-09 07:55:14 +0000 | [diff] [blame] | 159 | int cifs_verify_signature(struct smb_hdr *cifs_pdu, |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 160 | struct TCP_Server_Info *server, |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 161 | __u32 expected_sequence_number) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | { |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 163 | unsigned int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | char server_response_sig[8]; |
| 165 | char what_we_think_sig_should_be[20]; |
| 166 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 167 | if (cifs_pdu == NULL || server == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | return -EINVAL; |
| 169 | |
| 170 | if (cifs_pdu->Command == SMB_COM_NEGOTIATE) |
| 171 | return 0; |
| 172 | |
| 173 | if (cifs_pdu->Command == SMB_COM_LOCKING_ANDX) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 174 | struct smb_com_lock_req *pSMB = |
Steve French | ffdd6e4 | 2007-06-24 21:15:44 +0000 | [diff] [blame] | 175 | (struct smb_com_lock_req *)cifs_pdu; |
| 176 | if (pSMB->LockType & LOCKING_ANDX_OPLOCK_RELEASE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | return 0; |
| 178 | } |
| 179 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 180 | /* BB what if signatures are supposed to be on for session but |
| 181 | server does not send one? BB */ |
| 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | /* Do not need to verify session setups with signature "BSRSPYL " */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 184 | if (memcmp(cifs_pdu->Signature.SecuritySignature, "BSRSPYL ", 8) == 0) |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 185 | cFYI(1, "dummy signature received for smb command 0x%x", |
| 186 | cifs_pdu->Command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
| 188 | /* save off the origiginal signature so we can modify the smb and check |
| 189 | its signature against what the server sent */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 190 | memcpy(server_response_sig, cifs_pdu->Signature.SecuritySignature, 8); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 192 | cifs_pdu->Signature.Sequence.SequenceNumber = |
| 193 | cpu_to_le32(expected_sequence_number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | cifs_pdu->Signature.Sequence.Reserved = 0; |
| 195 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 196 | rc = cifs_calculate_signature(cifs_pdu, server, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | what_we_think_sig_should_be); |
| 198 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 199 | if (rc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | return rc; |
| 201 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 202 | /* cifs_dump_mem("what we think it should be: ", |
| 203 | what_we_think_sig_should_be, 16); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 205 | if (memcmp(server_response_sig, what_we_think_sig_should_be, 8)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | return -EACCES; |
| 207 | else |
| 208 | return 0; |
| 209 | |
| 210 | } |
| 211 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 212 | /* first calculate 24 bytes ntlm response and then 16 byte session key */ |
| 213 | int setup_ntlm_response(struct cifsSesInfo *ses) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | { |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 215 | unsigned int temp_len = CIFS_SESS_KEY_SIZE + CIFS_AUTH_RESP_SIZE; |
| 216 | char temp_key[CIFS_SESS_KEY_SIZE]; |
| 217 | |
| 218 | if (!ses) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | return -EINVAL; |
| 220 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 221 | ses->auth_key.response = kmalloc(temp_len, GFP_KERNEL); |
| 222 | if (!ses->auth_key.response) { |
| 223 | cERROR(1, "NTLM can't allocate (%u bytes) memory", temp_len); |
| 224 | return -ENOMEM; |
| 225 | } |
| 226 | ses->auth_key.len = temp_len; |
| 227 | |
| 228 | SMBNTencrypt(ses->password, ses->cryptKey, |
| 229 | ses->auth_key.response + CIFS_SESS_KEY_SIZE); |
| 230 | |
| 231 | E_md4hash(ses->password, temp_key); |
| 232 | mdfour(ses->auth_key.response, temp_key, CIFS_SESS_KEY_SIZE); |
| 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | return 0; |
| 235 | } |
| 236 | |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 237 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
Jeff Layton | 4e53a3f | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 238 | void calc_lanman_hash(const char *password, const char *cryptkey, bool encrypt, |
| 239 | char *lnm_session_key) |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 240 | { |
| 241 | int i; |
| 242 | char password_with_pad[CIFS_ENCPWD_SIZE]; |
| 243 | |
| 244 | memset(password_with_pad, 0, CIFS_ENCPWD_SIZE); |
Jeff Layton | 4e53a3f | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 245 | if (password) |
| 246 | strncpy(password_with_pad, password, CIFS_ENCPWD_SIZE); |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 247 | |
Jeff Layton | 04912d6 | 2010-04-24 07:57:45 -0400 | [diff] [blame] | 248 | if (!encrypt && global_secflags & CIFSSEC_MAY_PLNTXT) { |
Jeff Layton | 4e53a3f | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 249 | memset(lnm_session_key, 0, CIFS_SESS_KEY_SIZE); |
| 250 | memcpy(lnm_session_key, password_with_pad, |
| 251 | CIFS_ENCPWD_SIZE); |
| 252 | return; |
| 253 | } |
Steve French | bdc4bf6e | 2006-06-02 22:57:13 +0000 | [diff] [blame] | 254 | |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 255 | /* calculate old style session key */ |
| 256 | /* calling toupper is less broken than repeatedly |
| 257 | calling nls_toupper would be since that will never |
| 258 | work for UTF8, but neither handles multibyte code pages |
| 259 | but the only alternative would be converting to UCS-16 (Unicode) |
| 260 | (using a routine something like UniStrupr) then |
| 261 | uppercasing and then converting back from Unicode - which |
| 262 | would only worth doing it if we knew it were utf8. Basically |
| 263 | utf8 and other multibyte codepages each need their own strupper |
| 264 | function since a byte at a time will ont work. */ |
| 265 | |
Shirish Pargaonkar | ef571ca | 2008-07-24 15:56:05 +0000 | [diff] [blame] | 266 | for (i = 0; i < CIFS_ENCPWD_SIZE; i++) |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 267 | password_with_pad[i] = toupper(password_with_pad[i]); |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 268 | |
Jeff Layton | 4e53a3f | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 269 | SMBencrypt(password_with_pad, cryptkey, lnm_session_key); |
| 270 | |
Steve French | 7c7b25b | 2006-06-01 19:20:10 +0000 | [diff] [blame] | 271 | /* clear password before we return/free memory */ |
| 272 | memset(password_with_pad, 0, CIFS_ENCPWD_SIZE); |
| 273 | } |
| 274 | #endif /* CIFS_WEAK_PW_HASH */ |
| 275 | |
Shirish Pargaonkar | 9daa42e | 2010-10-10 13:21:05 -0500 | [diff] [blame] | 276 | /* Build a proper attribute value/target info pairs blob. |
| 277 | * Fill in netbios and dns domain name and workstation name |
| 278 | * and client time (total five av pairs and + one end of fields indicator. |
| 279 | * Allocate domain name which gets freed when session struct is deallocated. |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 280 | */ |
| 281 | static int |
Shirish Pargaonkar | 9daa42e | 2010-10-10 13:21:05 -0500 | [diff] [blame] | 282 | build_avpair_blob(struct cifsSesInfo *ses, const struct nls_table *nls_cp) |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 283 | { |
Shirish Pargaonkar | 9daa42e | 2010-10-10 13:21:05 -0500 | [diff] [blame] | 284 | unsigned int dlen; |
| 285 | unsigned int wlen; |
| 286 | unsigned int size = 6 * sizeof(struct ntlmssp2_name); |
| 287 | __le64 curtime; |
| 288 | char *defdmname = "WORKGROUP"; |
| 289 | unsigned char *blobptr; |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 290 | struct ntlmssp2_name *attrptr; |
| 291 | |
Shirish Pargaonkar | 9daa42e | 2010-10-10 13:21:05 -0500 | [diff] [blame] | 292 | if (!ses->domainName) { |
| 293 | ses->domainName = kstrdup(defdmname, GFP_KERNEL); |
| 294 | if (!ses->domainName) |
| 295 | return -ENOMEM; |
| 296 | } |
| 297 | |
| 298 | dlen = strlen(ses->domainName); |
| 299 | wlen = strlen(ses->server->hostname); |
| 300 | |
| 301 | /* The length of this blob is a size which is |
| 302 | * six times the size of a structure which holds name/size + |
| 303 | * two times the unicode length of a domain name + |
| 304 | * two times the unicode length of a server name + |
| 305 | * size of a timestamp (which is 8 bytes). |
| 306 | */ |
| 307 | ses->tilen = size + 2 * (2 * dlen) + 2 * (2 * wlen) + 8; |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 308 | ses->tiblob = kzalloc(ses->tilen, GFP_KERNEL); |
| 309 | if (!ses->tiblob) { |
| 310 | ses->tilen = 0; |
| 311 | cERROR(1, "Challenge target info allocation failure"); |
| 312 | return -ENOMEM; |
| 313 | } |
Shirish Pargaonkar | 9daa42e | 2010-10-10 13:21:05 -0500 | [diff] [blame] | 314 | |
| 315 | blobptr = ses->tiblob; |
| 316 | attrptr = (struct ntlmssp2_name *) blobptr; |
| 317 | |
| 318 | attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_DOMAIN_NAME); |
| 319 | attrptr->length = cpu_to_le16(2 * dlen); |
| 320 | blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name); |
| 321 | cifs_strtoUCS((__le16 *)blobptr, ses->domainName, dlen, nls_cp); |
| 322 | |
| 323 | blobptr += 2 * dlen; |
| 324 | attrptr = (struct ntlmssp2_name *) blobptr; |
| 325 | |
| 326 | attrptr->type = cpu_to_le16(NTLMSSP_AV_NB_COMPUTER_NAME); |
| 327 | attrptr->length = cpu_to_le16(2 * wlen); |
| 328 | blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name); |
| 329 | cifs_strtoUCS((__le16 *)blobptr, ses->server->hostname, wlen, nls_cp); |
| 330 | |
| 331 | blobptr += 2 * wlen; |
| 332 | attrptr = (struct ntlmssp2_name *) blobptr; |
| 333 | |
| 334 | attrptr->type = cpu_to_le16(NTLMSSP_AV_DNS_DOMAIN_NAME); |
| 335 | attrptr->length = cpu_to_le16(2 * dlen); |
| 336 | blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name); |
| 337 | cifs_strtoUCS((__le16 *)blobptr, ses->domainName, dlen, nls_cp); |
| 338 | |
| 339 | blobptr += 2 * dlen; |
| 340 | attrptr = (struct ntlmssp2_name *) blobptr; |
| 341 | |
| 342 | attrptr->type = cpu_to_le16(NTLMSSP_AV_DNS_COMPUTER_NAME); |
| 343 | attrptr->length = cpu_to_le16(2 * wlen); |
| 344 | blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name); |
| 345 | cifs_strtoUCS((__le16 *)blobptr, ses->server->hostname, wlen, nls_cp); |
| 346 | |
| 347 | blobptr += 2 * wlen; |
| 348 | attrptr = (struct ntlmssp2_name *) blobptr; |
| 349 | |
| 350 | attrptr->type = cpu_to_le16(NTLMSSP_AV_TIMESTAMP); |
| 351 | attrptr->length = cpu_to_le16(sizeof(__le64)); |
| 352 | blobptr = (unsigned char *)attrptr + sizeof(struct ntlmssp2_name); |
| 353 | curtime = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); |
| 354 | memcpy(blobptr, &curtime, sizeof(__le64)); |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 355 | |
| 356 | return 0; |
| 357 | } |
| 358 | |
| 359 | /* Server has provided av pairs/target info in the type 2 challenge |
| 360 | * packet and we have plucked it and stored within smb session. |
| 361 | * We parse that blob here to find netbios domain name to be used |
| 362 | * as part of ntlmv2 authentication (in Target String), if not already |
| 363 | * specified on the command line. |
| 364 | * If this function returns without any error but without fetching |
| 365 | * domain name, authentication may fail against some server but |
| 366 | * may not fail against other (those who are not very particular |
| 367 | * about target string i.e. for some, just user name might suffice. |
| 368 | */ |
| 369 | static int |
| 370 | find_domain_name(struct cifsSesInfo *ses) |
| 371 | { |
| 372 | unsigned int attrsize; |
| 373 | unsigned int type; |
| 374 | unsigned int onesize = sizeof(struct ntlmssp2_name); |
| 375 | unsigned char *blobptr; |
| 376 | unsigned char *blobend; |
| 377 | struct ntlmssp2_name *attrptr; |
| 378 | |
| 379 | if (!ses->tilen || !ses->tiblob) |
| 380 | return 0; |
| 381 | |
| 382 | blobptr = ses->tiblob; |
| 383 | blobend = ses->tiblob + ses->tilen; |
| 384 | |
| 385 | while (blobptr + onesize < blobend) { |
| 386 | attrptr = (struct ntlmssp2_name *) blobptr; |
| 387 | type = le16_to_cpu(attrptr->type); |
| 388 | if (type == NTLMSSP_AV_EOL) |
| 389 | break; |
| 390 | blobptr += 2; /* advance attr type */ |
| 391 | attrsize = le16_to_cpu(attrptr->length); |
| 392 | blobptr += 2; /* advance attr size */ |
| 393 | if (blobptr + attrsize > blobend) |
| 394 | break; |
| 395 | if (type == NTLMSSP_AV_NB_DOMAIN_NAME) { |
| 396 | if (!attrsize) |
| 397 | break; |
| 398 | if (!ses->domainName) { |
Jeff Layton | ccc46a74 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 399 | struct nls_table *default_nls; |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 400 | ses->domainName = |
| 401 | kmalloc(attrsize + 1, GFP_KERNEL); |
| 402 | if (!ses->domainName) |
| 403 | return -ENOMEM; |
Jeff Layton | ccc46a74 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 404 | default_nls = load_nls_default(); |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 405 | cifs_from_ucs2(ses->domainName, |
| 406 | (__le16 *)blobptr, attrsize, attrsize, |
Jeff Layton | ccc46a74 | 2010-10-06 19:51:12 -0400 | [diff] [blame] | 407 | default_nls, false); |
| 408 | unload_nls(default_nls); |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 409 | break; |
| 410 | } |
| 411 | } |
| 412 | blobptr += attrsize; /* advance attr value */ |
| 413 | } |
| 414 | |
| 415 | return 0; |
| 416 | } |
| 417 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 418 | static int calc_ntlmv2_hash(struct cifsSesInfo *ses, |
| 419 | const struct nls_table *nls_cp) |
Steve French | a8ee034 | 2006-06-05 23:34:19 +0000 | [diff] [blame] | 420 | { |
| 421 | int rc = 0; |
| 422 | int len; |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 423 | char nt_hash[16]; |
| 424 | struct HMACMD5Context *pctxt; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 425 | wchar_t *user; |
| 426 | wchar_t *domain; |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 427 | |
| 428 | pctxt = kmalloc(sizeof(struct HMACMD5Context), GFP_KERNEL); |
| 429 | |
| 430 | if (pctxt == NULL) |
| 431 | return -ENOMEM; |
Steve French | a8ee034 | 2006-06-05 23:34:19 +0000 | [diff] [blame] | 432 | |
| 433 | /* calculate md4 hash of password */ |
| 434 | E_md4hash(ses->password, nt_hash); |
| 435 | |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 436 | /* convert Domainname to unicode and uppercase */ |
| 437 | hmac_md5_init_limK_to_64(nt_hash, 16, pctxt); |
Steve French | a8ee034 | 2006-06-05 23:34:19 +0000 | [diff] [blame] | 438 | |
| 439 | /* convert ses->userName to unicode and uppercase */ |
Steve French | 1717ffc | 2006-06-08 05:41:32 +0000 | [diff] [blame] | 440 | len = strlen(ses->userName); |
| 441 | user = kmalloc(2 + (len * 2), GFP_KERNEL); |
Steve French | 56234e2 | 2010-09-08 20:57:05 +0000 | [diff] [blame] | 442 | if (user == NULL) |
Steve French | 1717ffc | 2006-06-08 05:41:32 +0000 | [diff] [blame] | 443 | goto calc_exit_2; |
Cyril Gorcunov | 8f2376a | 2007-10-14 17:58:43 +0000 | [diff] [blame] | 444 | len = cifs_strtoUCS((__le16 *)user, ses->userName, len, nls_cp); |
Steve French | 1717ffc | 2006-06-08 05:41:32 +0000 | [diff] [blame] | 445 | UniStrupr(user); |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 446 | hmac_md5_update((char *)user, 2*len, pctxt); |
Steve French | a8ee034 | 2006-06-05 23:34:19 +0000 | [diff] [blame] | 447 | |
| 448 | /* convert ses->domainName to unicode and uppercase */ |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 449 | if (ses->domainName) { |
Steve French | 1717ffc | 2006-06-08 05:41:32 +0000 | [diff] [blame] | 450 | len = strlen(ses->domainName); |
Steve French | a8ee034 | 2006-06-05 23:34:19 +0000 | [diff] [blame] | 451 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 452 | domain = kmalloc(2 + (len * 2), GFP_KERNEL); |
Steve French | 56234e2 | 2010-09-08 20:57:05 +0000 | [diff] [blame] | 453 | if (domain == NULL) |
Steve French | 1717ffc | 2006-06-08 05:41:32 +0000 | [diff] [blame] | 454 | goto calc_exit_1; |
Cyril Gorcunov | 8f2376a | 2007-10-14 17:58:43 +0000 | [diff] [blame] | 455 | len = cifs_strtoUCS((__le16 *)domain, ses->domainName, len, |
| 456 | nls_cp); |
Steve French | b609f06 | 2007-07-09 07:55:14 +0000 | [diff] [blame] | 457 | /* the following line was removed since it didn't work well |
| 458 | with lower cased domain name that passed as an option. |
| 459 | Maybe converting the domain name earlier makes sense */ |
| 460 | /* UniStrupr(domain); */ |
Steve French | a8ee034 | 2006-06-05 23:34:19 +0000 | [diff] [blame] | 461 | |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 462 | hmac_md5_update((char *)domain, 2*len, pctxt); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 463 | |
Steve French | 1717ffc | 2006-06-08 05:41:32 +0000 | [diff] [blame] | 464 | kfree(domain); |
| 465 | } |
| 466 | calc_exit_1: |
| 467 | kfree(user); |
| 468 | calc_exit_2: |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 469 | /* BB FIXME what about bytes 24 through 40 of the signing key? |
Steve French | 1717ffc | 2006-06-08 05:41:32 +0000 | [diff] [blame] | 470 | compare with the NTLM example */ |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 471 | hmac_md5_final(ses->ntlmv2_hash, pctxt); |
Steve French | a8ee034 | 2006-06-05 23:34:19 +0000 | [diff] [blame] | 472 | |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 473 | kfree(pctxt); |
Steve French | a8ee034 | 2006-06-05 23:34:19 +0000 | [diff] [blame] | 474 | return rc; |
| 475 | } |
| 476 | |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 477 | int |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 478 | setup_ntlmv2_rsp(struct cifsSesInfo *ses, const struct nls_table *nls_cp) |
Steve French | 9fbc590 | 2010-08-20 20:42:26 +0000 | [diff] [blame] | 479 | { |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 480 | int rc; |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 481 | int baselen; |
| 482 | struct ntlmv2_resp *buf; |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 483 | struct HMACMD5Context context; |
Steve French | 6d027cf | 2006-06-05 16:26:05 +0000 | [diff] [blame] | 484 | |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 485 | if (ses->server->secType == RawNTLMSSP) { |
| 486 | if (!ses->domainName) { |
| 487 | rc = find_domain_name(ses); |
| 488 | if (rc) { |
| 489 | cERROR(1, "error %d finding domain name", rc); |
| 490 | goto setup_ntlmv2_rsp_ret; |
| 491 | } |
| 492 | } |
| 493 | } else { |
Shirish Pargaonkar | 9daa42e | 2010-10-10 13:21:05 -0500 | [diff] [blame] | 494 | rc = build_avpair_blob(ses, nls_cp); |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 495 | if (rc) { |
| 496 | cERROR(1, "error %d building av pair blob", rc); |
| 497 | return rc; |
| 498 | } |
| 499 | } |
Steve French | a8ee034 | 2006-06-05 23:34:19 +0000 | [diff] [blame] | 500 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 501 | baselen = CIFS_SESS_KEY_SIZE + sizeof(struct ntlmv2_resp); |
| 502 | ses->auth_key.len = baselen + ses->tilen; |
| 503 | ses->auth_key.response = kmalloc(ses->auth_key.len, GFP_KERNEL); |
| 504 | if (!ses->auth_key.response) { |
| 505 | rc = ENOMEM; |
| 506 | cERROR(1, "%s: Can't allocate auth blob", __func__); |
| 507 | goto setup_ntlmv2_rsp_ret; |
| 508 | } |
| 509 | |
| 510 | buf = (struct ntlmv2_resp *) |
| 511 | (ses->auth_key.response + CIFS_SESS_KEY_SIZE); |
| 512 | buf->blob_signature = cpu_to_le32(0x00000101); |
| 513 | buf->reserved = 0; |
| 514 | buf->time = cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME)); |
| 515 | get_random_bytes(&buf->client_chal, sizeof(buf->client_chal)); |
| 516 | buf->reserved2 = 0; |
| 517 | |
| 518 | memcpy(ses->auth_key.response + baselen, ses->tiblob, ses->tilen); |
| 519 | |
Steve French | 6d027cf | 2006-06-05 16:26:05 +0000 | [diff] [blame] | 520 | /* calculate buf->ntlmv2_hash */ |
Steve French | 1717ffc | 2006-06-08 05:41:32 +0000 | [diff] [blame] | 521 | rc = calc_ntlmv2_hash(ses, nls_cp); |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 522 | if (rc) { |
Joe Perches | b6b38f7 | 2010-04-21 03:50:45 +0000 | [diff] [blame] | 523 | cERROR(1, "could not get v2 hash rc %d", rc); |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 524 | goto setup_ntlmv2_rsp_ret; |
| 525 | } |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 526 | CalcNTLMv2_response(ses); |
Steve French | b609f06 | 2007-07-09 07:55:14 +0000 | [diff] [blame] | 527 | |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 528 | /* now calculate the session key for NTLMv2 */ |
| 529 | hmac_md5_init_limK_to_64(ses->ntlmv2_hash, 16, &context); |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 530 | hmac_md5_update(ses->auth_key.response + CIFS_SESS_KEY_SIZE, |
| 531 | 16, &context); |
| 532 | hmac_md5_final(ses->auth_key.response, &context); |
Shirish Pargaonkar | 2b149f1 | 2010-09-18 22:02:18 -0500 | [diff] [blame] | 533 | |
| 534 | return 0; |
| 535 | |
| 536 | setup_ntlmv2_rsp_ret: |
| 537 | kfree(ses->tiblob); |
| 538 | ses->tiblob = NULL; |
| 539 | ses->tilen = 0; |
| 540 | |
| 541 | return rc; |
Steve French | 6d027cf | 2006-06-05 16:26:05 +0000 | [diff] [blame] | 542 | } |
| 543 | |
Shirish Pargaonkar | d2b9152 | 2010-10-21 14:25:08 -0500 | [diff] [blame^] | 544 | int |
| 545 | calc_seckey(struct cifsSesInfo *ses) |
| 546 | { |
| 547 | int rc; |
| 548 | struct crypto_blkcipher *tfm_arc4; |
| 549 | struct scatterlist sgin, sgout; |
| 550 | struct blkcipher_desc desc; |
| 551 | unsigned char sec_key[CIFS_SESS_KEY_SIZE]; /* a nonce */ |
| 552 | |
| 553 | get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE); |
| 554 | |
| 555 | tfm_arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC); |
| 556 | if (!tfm_arc4 || IS_ERR(tfm_arc4)) { |
| 557 | cERROR(1, "could not allocate crypto API arc4\n"); |
| 558 | return PTR_ERR(tfm_arc4); |
| 559 | } |
| 560 | |
| 561 | desc.tfm = tfm_arc4; |
| 562 | |
| 563 | crypto_blkcipher_setkey(tfm_arc4, ses->auth_key.response, |
| 564 | CIFS_SESS_KEY_SIZE); |
| 565 | |
| 566 | sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE); |
| 567 | sg_init_one(&sgout, ses->ntlmssp.ciphertext, CIFS_CPHTXT_SIZE); |
| 568 | |
| 569 | rc = crypto_blkcipher_encrypt(&desc, &sgout, &sgin, CIFS_CPHTXT_SIZE); |
| 570 | if (rc) { |
| 571 | cERROR(1, "could not encrypt session key rc: %d\n", rc); |
| 572 | crypto_free_blkcipher(tfm_arc4); |
| 573 | return rc; |
| 574 | } |
| 575 | |
| 576 | /* make secondary_key/nonce as session key */ |
| 577 | memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE); |
| 578 | /* and make len as that of session key only */ |
| 579 | ses->auth_key.len = CIFS_SESS_KEY_SIZE; |
| 580 | |
| 581 | crypto_free_blkcipher(tfm_arc4); |
| 582 | |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | void |
| 587 | cifs_crypto_shash_release(struct TCP_Server_Info *server) |
| 588 | { |
| 589 | if (server->secmech.md5) |
| 590 | crypto_free_shash(server->secmech.md5); |
| 591 | |
| 592 | if (server->secmech.hmacmd5) |
| 593 | crypto_free_shash(server->secmech.hmacmd5); |
| 594 | |
| 595 | kfree(server->secmech.sdeschmacmd5); |
| 596 | |
| 597 | kfree(server->secmech.sdescmd5); |
| 598 | } |
| 599 | |
| 600 | int |
| 601 | cifs_crypto_shash_allocate(struct TCP_Server_Info *server) |
| 602 | { |
| 603 | int rc; |
| 604 | unsigned int size; |
| 605 | |
| 606 | server->secmech.hmacmd5 = crypto_alloc_shash("hmac(md5)", 0, 0); |
| 607 | if (!server->secmech.hmacmd5 || |
| 608 | IS_ERR(server->secmech.hmacmd5)) { |
| 609 | cERROR(1, "could not allocate crypto hmacmd5\n"); |
| 610 | return PTR_ERR(server->secmech.hmacmd5); |
| 611 | } |
| 612 | |
| 613 | server->secmech.md5 = crypto_alloc_shash("md5", 0, 0); |
| 614 | if (!server->secmech.md5 || IS_ERR(server->secmech.md5)) { |
| 615 | cERROR(1, "could not allocate crypto md5\n"); |
| 616 | rc = PTR_ERR(server->secmech.md5); |
| 617 | goto crypto_allocate_md5_fail; |
| 618 | } |
| 619 | |
| 620 | size = sizeof(struct shash_desc) + |
| 621 | crypto_shash_descsize(server->secmech.hmacmd5); |
| 622 | server->secmech.sdeschmacmd5 = kmalloc(size, GFP_KERNEL); |
| 623 | if (!server->secmech.sdeschmacmd5) { |
| 624 | cERROR(1, "cifs_crypto_shash_allocate: can't alloc hmacmd5\n"); |
| 625 | rc = -ENOMEM; |
| 626 | goto crypto_allocate_hmacmd5_sdesc_fail; |
| 627 | } |
| 628 | server->secmech.sdeschmacmd5->shash.tfm = server->secmech.hmacmd5; |
| 629 | server->secmech.sdeschmacmd5->shash.flags = 0x0; |
| 630 | |
| 631 | |
| 632 | size = sizeof(struct shash_desc) + |
| 633 | crypto_shash_descsize(server->secmech.md5); |
| 634 | server->secmech.sdescmd5 = kmalloc(size, GFP_KERNEL); |
| 635 | if (!server->secmech.sdescmd5) { |
| 636 | cERROR(1, "cifs_crypto_shash_allocate: can't alloc md5\n"); |
| 637 | rc = -ENOMEM; |
| 638 | goto crypto_allocate_md5_sdesc_fail; |
| 639 | } |
| 640 | server->secmech.sdescmd5->shash.tfm = server->secmech.md5; |
| 641 | server->secmech.sdescmd5->shash.flags = 0x0; |
| 642 | |
| 643 | return 0; |
| 644 | |
| 645 | crypto_allocate_md5_sdesc_fail: |
| 646 | kfree(server->secmech.sdeschmacmd5); |
| 647 | |
| 648 | crypto_allocate_hmacmd5_sdesc_fail: |
| 649 | crypto_free_shash(server->secmech.md5); |
| 650 | |
| 651 | crypto_allocate_md5_fail: |
| 652 | crypto_free_shash(server->secmech.hmacmd5); |
| 653 | |
| 654 | return rc; |
| 655 | } |
| 656 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 657 | void CalcNTLMv2_response(const struct cifsSesInfo *ses) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | { |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 659 | unsigned int offset = CIFS_SESS_KEY_SIZE + 8; |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 660 | struct HMACMD5Context context; |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 661 | |
Steve French | c8e56f1 | 2010-09-08 21:10:58 +0000 | [diff] [blame] | 662 | /* rest of v2 struct already generated */ |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 663 | memcpy(ses->auth_key.response + offset, ses->cryptKey, 8); |
Shirish Pargaonkar | 5d0d288 | 2010-10-13 18:15:00 -0500 | [diff] [blame] | 664 | hmac_md5_init_limK_to_64(ses->ntlmv2_hash, 16, &context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 666 | hmac_md5_update(ses->auth_key.response + offset, |
| 667 | ses->auth_key.len - offset, &context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
Shirish Pargaonkar | 21e7339 | 2010-10-21 06:42:55 -0500 | [diff] [blame] | 669 | hmac_md5_final(ses->auth_key.response + CIFS_SESS_KEY_SIZE, &context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | } |