1/*- 2 * Copyright (c) 2000-2001, Boris Popov 3 * All rights reserved. 4 * 5 * Copyright (c) 2003, 2004 Tim J. Robbins. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Boris Popov. 19 * 4. Neither the name of the author nor the names of any co-contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#include <sys/cdefs.h>
| 1/*- 2 * Copyright (c) 2000-2001, Boris Popov 3 * All rights reserved. 4 * 5 * Copyright (c) 2003, 2004 Tim J. Robbins. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Boris Popov. 19 * 4. Neither the name of the author nor the names of any co-contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#include <sys/cdefs.h>
|
37__FBSDID("$FreeBSD: head/sys/netsmb/smb_crypt.c 139823 2005-01-07 01:45:51Z imp $");
| 37__FBSDID("$FreeBSD: head/sys/netsmb/smb_crypt.c 156326 2006-03-05 22:52:17Z yar $");
|
38 39#include <sys/param.h> 40#include <sys/malloc.h> 41#include <sys/kernel.h> 42#include <sys/systm.h> 43#include <sys/conf.h> 44#include <sys/proc.h> 45#include <sys/fcntl.h> 46#include <sys/socket.h> 47#include <sys/socketvar.h> 48#include <sys/sysctl.h> 49#include <sys/endian.h> 50#include <sys/mbuf.h> 51#include <sys/mchain.h> 52#include <sys/md4.h> 53#include <sys/md5.h> 54#include <sys/iconv.h> 55 56#include <netsmb/smb.h> 57#include <netsmb/smb_conn.h> 58#include <netsmb/smb_subr.h> 59#include <netsmb/smb_rq.h> 60#include <netsmb/smb_dev.h> 61
| 38 39#include <sys/param.h> 40#include <sys/malloc.h> 41#include <sys/kernel.h> 42#include <sys/systm.h> 43#include <sys/conf.h> 44#include <sys/proc.h> 45#include <sys/fcntl.h> 46#include <sys/socket.h> 47#include <sys/socketvar.h> 48#include <sys/sysctl.h> 49#include <sys/endian.h> 50#include <sys/mbuf.h> 51#include <sys/mchain.h> 52#include <sys/md4.h> 53#include <sys/md5.h> 54#include <sys/iconv.h> 55 56#include <netsmb/smb.h> 57#include <netsmb/smb_conn.h> 58#include <netsmb/smb_subr.h> 59#include <netsmb/smb_rq.h> 60#include <netsmb/smb_dev.h> 61
|
62#include "opt_netsmb.h" 63 64#ifdef NETSMBCRYPTO 65
| |
66#include <crypto/des/des.h> 67
| 62#include <crypto/des/des.h> 63
|
| 64#include "opt_netsmb.h" 65
|
68static u_char N8[] = {0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25}; 69 70 71static void 72smb_E(const u_char *key, u_char *data, u_char *dest) 73{ 74 des_key_schedule *ksp; 75 u_char kk[8]; 76 77 kk[0] = key[0] & 0xfe; 78 kk[1] = key[0] << 7 | (key[1] >> 1 & 0xfe); 79 kk[2] = key[1] << 6 | (key[2] >> 2 & 0xfe); 80 kk[3] = key[2] << 5 | (key[3] >> 3 & 0xfe); 81 kk[4] = key[3] << 4 | (key[4] >> 4 & 0xfe); 82 kk[5] = key[4] << 3 | (key[5] >> 5 & 0xfe); 83 kk[6] = key[5] << 2 | (key[6] >> 6 & 0xfe); 84 kk[7] = key[6] << 1; 85 ksp = malloc(sizeof(des_key_schedule), M_SMBTEMP, M_WAITOK); 86 des_set_key((des_cblock *)kk, *ksp); 87 des_ecb_encrypt((des_cblock *)data, (des_cblock *)dest, *ksp, 1); 88 free(ksp, M_SMBTEMP); 89}
| 66static u_char N8[] = {0x4b, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25}; 67 68 69static void 70smb_E(const u_char *key, u_char *data, u_char *dest) 71{ 72 des_key_schedule *ksp; 73 u_char kk[8]; 74 75 kk[0] = key[0] & 0xfe; 76 kk[1] = key[0] << 7 | (key[1] >> 1 & 0xfe); 77 kk[2] = key[1] << 6 | (key[2] >> 2 & 0xfe); 78 kk[3] = key[2] << 5 | (key[3] >> 3 & 0xfe); 79 kk[4] = key[3] << 4 | (key[4] >> 4 & 0xfe); 80 kk[5] = key[4] << 3 | (key[5] >> 5 & 0xfe); 81 kk[6] = key[5] << 2 | (key[6] >> 6 & 0xfe); 82 kk[7] = key[6] << 1; 83 ksp = malloc(sizeof(des_key_schedule), M_SMBTEMP, M_WAITOK); 84 des_set_key((des_cblock *)kk, *ksp); 85 des_ecb_encrypt((des_cblock *)data, (des_cblock *)dest, *ksp, 1); 86 free(ksp, M_SMBTEMP); 87}
|
90#endif
| |
91 92 93int 94smb_encrypt(const u_char *apwd, u_char *C8, u_char *RN) 95{
| 88 89 90int 91smb_encrypt(const u_char *apwd, u_char *C8, u_char *RN) 92{
|
96#ifdef NETSMBCRYPTO
| |
97 u_char *p, *P14, *S21; 98 99 p = malloc(14 + 21, M_SMBTEMP, M_WAITOK); 100 bzero(p, 14 + 21); 101 P14 = p; 102 S21 = p + 14; 103 bcopy(apwd, P14, min(14, strlen(apwd))); 104 /* 105 * S21 = concat(Ex(P14, N8), zeros(5)); 106 */ 107 smb_E(P14, N8, S21); 108 smb_E(P14 + 7, N8, S21 + 8); 109 110 smb_E(S21, C8, RN); 111 smb_E(S21 + 7, C8, RN + 8); 112 smb_E(S21 + 14, C8, RN + 16); 113 free(p, M_SMBTEMP); 114 return 0;
| 93 u_char *p, *P14, *S21; 94 95 p = malloc(14 + 21, M_SMBTEMP, M_WAITOK); 96 bzero(p, 14 + 21); 97 P14 = p; 98 S21 = p + 14; 99 bcopy(apwd, P14, min(14, strlen(apwd))); 100 /* 101 * S21 = concat(Ex(P14, N8), zeros(5)); 102 */ 103 smb_E(P14, N8, S21); 104 smb_E(P14 + 7, N8, S21 + 8); 105 106 smb_E(S21, C8, RN); 107 smb_E(S21 + 7, C8, RN + 8); 108 smb_E(S21 + 14, C8, RN + 16); 109 free(p, M_SMBTEMP); 110 return 0;
|
115#else 116 SMBERROR("password encryption is not available\n"); 117 bzero(RN, 24); 118 return EAUTH; 119#endif
| |
120} 121 122int 123smb_ntencrypt(const u_char *apwd, u_char *C8, u_char *RN) 124{
| 111} 112 113int 114smb_ntencrypt(const u_char *apwd, u_char *C8, u_char *RN) 115{
|
125#ifdef NETSMBCRYPTO
| |
126 u_char S21[21]; 127 u_int16_t *unipwd; 128 MD4_CTX *ctxp; 129 int len; 130 131 len = strlen(apwd); 132 unipwd = malloc((len + 1) * sizeof(u_int16_t), M_SMBTEMP, M_WAITOK); 133 /* 134 * S21 = concat(MD4(U(apwd)), zeros(5)); 135 */ 136 smb_strtouni(unipwd, apwd); 137 ctxp = malloc(sizeof(MD4_CTX), M_SMBTEMP, M_WAITOK); 138 MD4Init(ctxp); 139 MD4Update(ctxp, (u_char*)unipwd, len * sizeof(u_int16_t)); 140 free(unipwd, M_SMBTEMP); 141 bzero(S21, 21); 142 MD4Final(S21, ctxp); 143 free(ctxp, M_SMBTEMP); 144 145 smb_E(S21, C8, RN); 146 smb_E(S21 + 7, C8, RN + 8); 147 smb_E(S21 + 14, C8, RN + 16); 148 return 0;
| 116 u_char S21[21]; 117 u_int16_t *unipwd; 118 MD4_CTX *ctxp; 119 int len; 120 121 len = strlen(apwd); 122 unipwd = malloc((len + 1) * sizeof(u_int16_t), M_SMBTEMP, M_WAITOK); 123 /* 124 * S21 = concat(MD4(U(apwd)), zeros(5)); 125 */ 126 smb_strtouni(unipwd, apwd); 127 ctxp = malloc(sizeof(MD4_CTX), M_SMBTEMP, M_WAITOK); 128 MD4Init(ctxp); 129 MD4Update(ctxp, (u_char*)unipwd, len * sizeof(u_int16_t)); 130 free(unipwd, M_SMBTEMP); 131 bzero(S21, 21); 132 MD4Final(S21, ctxp); 133 free(ctxp, M_SMBTEMP); 134 135 smb_E(S21, C8, RN); 136 smb_E(S21 + 7, C8, RN + 8); 137 smb_E(S21 + 14, C8, RN + 16); 138 return 0;
|
149#else 150 SMBERROR("password encryption is not available\n"); 151 bzero(RN, 24); 152 return EAUTH; 153#endif
| |
154} 155 156/* 157 * Calculate message authentication code (MAC) key for virtual circuit. 158 */ 159int 160smb_calcmackey(struct smb_vc *vcp) 161{
| 139} 140 141/* 142 * Calculate message authentication code (MAC) key for virtual circuit. 143 */ 144int 145smb_calcmackey(struct smb_vc *vcp) 146{
|
162#ifdef NETSMBCRYPTO
| |
163 const char *pwd; 164 u_int16_t *unipwd; 165 int len; 166 MD4_CTX md4; 167 u_char S16[16], S21[21]; 168 169 KASSERT(vcp->vc_hflags2 & SMB_FLAGS2_SECURITY_SIGNATURE, 170 ("signatures not enabled")); 171 172 if (vcp->vc_mackey != NULL) { 173 free(vcp->vc_mackey, M_SMBTEMP); 174 vcp->vc_mackey = NULL; 175 vcp->vc_mackeylen = 0; 176 vcp->vc_seqno = 0; 177 } 178 179 /* 180 * The partial MAC key is the concatenation of the 16 byte session 181 * key and the 24 byte challenge response. 182 */ 183 vcp->vc_mackeylen = 16 + 24; 184 vcp->vc_mackey = malloc(vcp->vc_mackeylen, M_SMBTEMP, M_WAITOK); 185 186 /* 187 * Calculate session key: 188 * MD4(MD4(U(PN))) 189 */ 190 pwd = smb_vc_getpass(vcp); 191 len = strlen(pwd); 192 unipwd = malloc((len + 1) * sizeof(u_int16_t), M_SMBTEMP, M_WAITOK); 193 smb_strtouni(unipwd, pwd); 194 MD4Init(&md4); 195 MD4Update(&md4, (u_char *)unipwd, len * sizeof(u_int16_t)); 196 MD4Final(S16, &md4); 197 MD4Init(&md4); 198 MD4Update(&md4, S16, 16); 199 MD4Final(vcp->vc_mackey, &md4); 200 free(unipwd, M_SMBTEMP); 201 202 /* 203 * Calculate response to challenge: 204 * Ex(concat(MD4(U(pass)), zeros(5)), C8) 205 */ 206 bzero(S21, 21); 207 bcopy(S16, S21, 16); 208 smb_E(S21, vcp->vc_ch, vcp->vc_mackey + 16); 209 smb_E(S21 + 7, vcp->vc_ch, vcp->vc_mackey + 24); 210 smb_E(S21 + 14, vcp->vc_ch, vcp->vc_mackey + 32); 211 212 return (0);
| 147 const char *pwd; 148 u_int16_t *unipwd; 149 int len; 150 MD4_CTX md4; 151 u_char S16[16], S21[21]; 152 153 KASSERT(vcp->vc_hflags2 & SMB_FLAGS2_SECURITY_SIGNATURE, 154 ("signatures not enabled")); 155 156 if (vcp->vc_mackey != NULL) { 157 free(vcp->vc_mackey, M_SMBTEMP); 158 vcp->vc_mackey = NULL; 159 vcp->vc_mackeylen = 0; 160 vcp->vc_seqno = 0; 161 } 162 163 /* 164 * The partial MAC key is the concatenation of the 16 byte session 165 * key and the 24 byte challenge response. 166 */ 167 vcp->vc_mackeylen = 16 + 24; 168 vcp->vc_mackey = malloc(vcp->vc_mackeylen, M_SMBTEMP, M_WAITOK); 169 170 /* 171 * Calculate session key: 172 * MD4(MD4(U(PN))) 173 */ 174 pwd = smb_vc_getpass(vcp); 175 len = strlen(pwd); 176 unipwd = malloc((len + 1) * sizeof(u_int16_t), M_SMBTEMP, M_WAITOK); 177 smb_strtouni(unipwd, pwd); 178 MD4Init(&md4); 179 MD4Update(&md4, (u_char *)unipwd, len * sizeof(u_int16_t)); 180 MD4Final(S16, &md4); 181 MD4Init(&md4); 182 MD4Update(&md4, S16, 16); 183 MD4Final(vcp->vc_mackey, &md4); 184 free(unipwd, M_SMBTEMP); 185 186 /* 187 * Calculate response to challenge: 188 * Ex(concat(MD4(U(pass)), zeros(5)), C8) 189 */ 190 bzero(S21, 21); 191 bcopy(S16, S21, 16); 192 smb_E(S21, vcp->vc_ch, vcp->vc_mackey + 16); 193 smb_E(S21 + 7, vcp->vc_ch, vcp->vc_mackey + 24); 194 smb_E(S21 + 14, vcp->vc_ch, vcp->vc_mackey + 32); 195 196 return (0);
|
213#else 214 panic("smb_calcmackey: encryption not available"); 215 return (0); 216#endif /* NETSMBCRYPTO */
| |
217} 218 219/* 220 * Sign request with MAC. 221 */ 222int 223smb_rq_sign(struct smb_rq *rqp) 224{
| 197} 198 199/* 200 * Sign request with MAC. 201 */ 202int 203smb_rq_sign(struct smb_rq *rqp) 204{
|
225#ifdef NETSMBCRYPTO
| |
226 struct smb_vc *vcp = rqp->sr_vc; 227 struct mbchain *mbp; 228 struct mbuf *mb; 229 MD5_CTX md5; 230 u_char digest[16]; 231 232 KASSERT(vcp->vc_hflags2 & SMB_FLAGS2_SECURITY_SIGNATURE, 233 ("signatures not enabled")); 234 235 if (vcp->vc_mackey == NULL) 236 /* XXX Should assert that cmd == SMB_COM_NEGOTIATE. */ 237 return (0); 238 239 /* 240 * This is a bit of a kludge. If the request is non-TRANSACTION, 241 * or it is the first request of a transaction, give it the next 242 * sequence number, and expect the reply to have the sequence number 243 * following that one. Otherwise, it is a secondary request in 244 * a transaction, and it gets the same sequence numbers as the 245 * primary request. 246 */ 247 if (rqp->sr_t2 == NULL || 248 (rqp->sr_t2->t2_flags & SMBT2_SECONDARY) == 0) { 249 rqp->sr_seqno = vcp->vc_seqno++; 250 rqp->sr_rseqno = vcp->vc_seqno++; 251 } else { 252 /* 253 * Sequence numbers are already in the struct because 254 * smb_t2_request_int() uses the same one for all the 255 * requests in the transaction. 256 * (At least we hope so.) 257 */ 258 KASSERT(rqp->sr_t2 == NULL || 259 (rqp->sr_t2->t2_flags & SMBT2_SECONDARY) == 0 || 260 rqp->sr_t2->t2_rq == rqp, 261 ("sec t2 rq not using same smb_rq")); 262 } 263 264 /* Initialize sec. signature field to sequence number + zeros. */ 265 *(u_int32_t *)rqp->sr_rqsig = htole32(rqp->sr_seqno); 266 *(u_int32_t *)(rqp->sr_rqsig + 4) = 0; 267 268 /* 269 * Compute HMAC-MD5 of packet data, keyed by MAC key. 270 * Store the first 8 bytes in the sec. signature field. 271 */ 272 smb_rq_getrequest(rqp, &mbp); 273 MD5Init(&md5); 274 MD5Update(&md5, vcp->vc_mackey, vcp->vc_mackeylen); 275 for (mb = mbp->mb_top; mb != NULL; mb = mb->m_next) 276 MD5Update(&md5, mtod(mb, void *), mb->m_len); 277 MD5Final(digest, &md5); 278 bcopy(digest, rqp->sr_rqsig, 8); 279 280 return (0);
| 205 struct smb_vc *vcp = rqp->sr_vc; 206 struct mbchain *mbp; 207 struct mbuf *mb; 208 MD5_CTX md5; 209 u_char digest[16]; 210 211 KASSERT(vcp->vc_hflags2 & SMB_FLAGS2_SECURITY_SIGNATURE, 212 ("signatures not enabled")); 213 214 if (vcp->vc_mackey == NULL) 215 /* XXX Should assert that cmd == SMB_COM_NEGOTIATE. */ 216 return (0); 217 218 /* 219 * This is a bit of a kludge. If the request is non-TRANSACTION, 220 * or it is the first request of a transaction, give it the next 221 * sequence number, and expect the reply to have the sequence number 222 * following that one. Otherwise, it is a secondary request in 223 * a transaction, and it gets the same sequence numbers as the 224 * primary request. 225 */ 226 if (rqp->sr_t2 == NULL || 227 (rqp->sr_t2->t2_flags & SMBT2_SECONDARY) == 0) { 228 rqp->sr_seqno = vcp->vc_seqno++; 229 rqp->sr_rseqno = vcp->vc_seqno++; 230 } else { 231 /* 232 * Sequence numbers are already in the struct because 233 * smb_t2_request_int() uses the same one for all the 234 * requests in the transaction. 235 * (At least we hope so.) 236 */ 237 KASSERT(rqp->sr_t2 == NULL || 238 (rqp->sr_t2->t2_flags & SMBT2_SECONDARY) == 0 || 239 rqp->sr_t2->t2_rq == rqp, 240 ("sec t2 rq not using same smb_rq")); 241 } 242 243 /* Initialize sec. signature field to sequence number + zeros. */ 244 *(u_int32_t *)rqp->sr_rqsig = htole32(rqp->sr_seqno); 245 *(u_int32_t *)(rqp->sr_rqsig + 4) = 0; 246 247 /* 248 * Compute HMAC-MD5 of packet data, keyed by MAC key. 249 * Store the first 8 bytes in the sec. signature field. 250 */ 251 smb_rq_getrequest(rqp, &mbp); 252 MD5Init(&md5); 253 MD5Update(&md5, vcp->vc_mackey, vcp->vc_mackeylen); 254 for (mb = mbp->mb_top; mb != NULL; mb = mb->m_next) 255 MD5Update(&md5, mtod(mb, void *), mb->m_len); 256 MD5Final(digest, &md5); 257 bcopy(digest, rqp->sr_rqsig, 8); 258 259 return (0);
|
281#else 282 panic("smb_rq_sign: encryption not available"); 283 return (0); 284#endif /* NETSMBCRYPTO */
| |
285} 286 287/* 288 * Verify reply signature. 289 */ 290int 291smb_rq_verify(struct smb_rq *rqp) 292{
| 260} 261 262/* 263 * Verify reply signature. 264 */ 265int 266smb_rq_verify(struct smb_rq *rqp) 267{
|
293#ifdef NETSMBCRYPTO
| |
294 struct smb_vc *vcp = rqp->sr_vc; 295 struct mdchain *mdp; 296 u_char sigbuf[8]; 297 MD5_CTX md5; 298 u_char digest[16]; 299 struct mbuf *mb; 300 301 KASSERT(vcp->vc_hflags2 & SMB_FLAGS2_SECURITY_SIGNATURE, 302 ("signatures not enabled")); 303 304 if (vcp->vc_mackey == NULL) 305 /* XXX Should check that this is a SMB_COM_NEGOTIATE reply. */ 306 return (0); 307 308 /* 309 * Compute HMAC-MD5 of packet data, keyed by MAC key. 310 * We play games to pretend the security signature field 311 * contains their sequence number, to avoid modifying 312 * the packet itself. 313 */ 314 smb_rq_getreply(rqp, &mdp); 315 mb = mdp->md_top; 316 KASSERT(mb->m_len >= SMB_HDRLEN, ("forgot to m_pullup")); 317 MD5Init(&md5); 318 MD5Update(&md5, vcp->vc_mackey, vcp->vc_mackeylen); 319 MD5Update(&md5, mtod(mb, void *), 14); 320 *(u_int32_t *)sigbuf = htole32(rqp->sr_rseqno); 321 *(u_int32_t *)(sigbuf + 4) = 0; 322 MD5Update(&md5, sigbuf, 8); 323 MD5Update(&md5, mtod(mb, u_char *) + 22, mb->m_len - 22); 324 for (mb = mb->m_next; mb != NULL; mb = mb->m_next) 325 MD5Update(&md5, mtod(mb, void *), mb->m_len); 326 MD5Final(digest, &md5); 327 328 /* 329 * Now verify the signature. 330 */ 331 if (bcmp(mtod(mdp->md_top, u_char *) + 14, digest, 8) != 0) 332 return (EAUTH); 333 334 return (0);
| 268 struct smb_vc *vcp = rqp->sr_vc; 269 struct mdchain *mdp; 270 u_char sigbuf[8]; 271 MD5_CTX md5; 272 u_char digest[16]; 273 struct mbuf *mb; 274 275 KASSERT(vcp->vc_hflags2 & SMB_FLAGS2_SECURITY_SIGNATURE, 276 ("signatures not enabled")); 277 278 if (vcp->vc_mackey == NULL) 279 /* XXX Should check that this is a SMB_COM_NEGOTIATE reply. */ 280 return (0); 281 282 /* 283 * Compute HMAC-MD5 of packet data, keyed by MAC key. 284 * We play games to pretend the security signature field 285 * contains their sequence number, to avoid modifying 286 * the packet itself. 287 */ 288 smb_rq_getreply(rqp, &mdp); 289 mb = mdp->md_top; 290 KASSERT(mb->m_len >= SMB_HDRLEN, ("forgot to m_pullup")); 291 MD5Init(&md5); 292 MD5Update(&md5, vcp->vc_mackey, vcp->vc_mackeylen); 293 MD5Update(&md5, mtod(mb, void *), 14); 294 *(u_int32_t *)sigbuf = htole32(rqp->sr_rseqno); 295 *(u_int32_t *)(sigbuf + 4) = 0; 296 MD5Update(&md5, sigbuf, 8); 297 MD5Update(&md5, mtod(mb, u_char *) + 22, mb->m_len - 22); 298 for (mb = mb->m_next; mb != NULL; mb = mb->m_next) 299 MD5Update(&md5, mtod(mb, void *), mb->m_len); 300 MD5Final(digest, &md5); 301 302 /* 303 * Now verify the signature. 304 */ 305 if (bcmp(mtod(mdp->md_top, u_char *) + 14, digest, 8) != 0) 306 return (EAUTH); 307 308 return (0);
|
335#else 336 panic("smb_rq_verify: encryption not available"); 337 return (0); 338#endif /* NETSMBCRYPTO */
| |
339}
| 309}
|