1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 * 25 * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 26 */ 27 28 /* 29 * This module provides Security Descriptor handling functions. 30 */ 31 32 #include <smbsrv/smb_kproto.h> 33 #include <smbsrv/smb_fsops.h> 34 #include <smbsrv/smb_idmap.h> 35 36 static void smb_sd_set_sacl(smb_sd_t *, smb_acl_t *, boolean_t, int); 37 static void smb_sd_set_dacl(smb_sd_t *, smb_acl_t *, boolean_t, int); 38 static uint32_t smb_sd_fromfs(smb_fssd_t *, smb_sd_t *); 39 40 void 41 smb_sd_init(smb_sd_t *sd, uint8_t revision) 42 { 43 bzero(sd, sizeof (smb_sd_t)); 44 sd->sd_revision = revision; 45 } 46 47 /* 48 * smb_sd_term 49 * 50 * Free non-NULL members of 'sd' which has to be in 51 * absolute (pointer) form. 52 */ 53 void 54 smb_sd_term(smb_sd_t *sd) 55 { 56 ASSERT(sd); 57 ASSERT((sd->sd_control & SE_SELF_RELATIVE) == 0); 58 59 smb_sid_free(sd->sd_owner); 60 smb_sid_free(sd->sd_group); 61 smb_acl_free(sd->sd_dacl); 62 smb_acl_free(sd->sd_sacl); 63 64 bzero(sd, sizeof (smb_sd_t)); 65 } 66 67 uint32_t 68 smb_sd_len(smb_sd_t *sd, uint32_t secinfo) 69 { 70 uint32_t length = SMB_SD_HDRSIZE; 71 72 if (secinfo & SMB_OWNER_SECINFO) 73 length += smb_sid_len(sd->sd_owner); 74 75 if (secinfo & SMB_GROUP_SECINFO) 76 length += smb_sid_len(sd->sd_group); 77 78 if (secinfo & SMB_DACL_SECINFO) 79 length += smb_acl_len(sd->sd_dacl); 80 81 if (secinfo & SMB_SACL_SECINFO) 82 length += smb_acl_len(sd->sd_sacl); 83 84 return (length); 85 } 86 87 /* 88 * smb_sd_get_secinfo 89 * 90 * Return the security information mask for the specified security 91 * descriptor. 92 */ 93 uint32_t 94 smb_sd_get_secinfo(smb_sd_t *sd) 95 { 96 uint32_t sec_info = 0; 97 98 if (sd == NULL) 99 return (0); 100 101 if (sd->sd_owner) 102 sec_info |= SMB_OWNER_SECINFO; 103 104 if (sd->sd_group) 105 sec_info |= SMB_GROUP_SECINFO; 106 107 if (sd->sd_dacl) 108 sec_info |= SMB_DACL_SECINFO; 109 110 if (sd->sd_sacl) 111 sec_info |= SMB_SACL_SECINFO; 112 113 return (sec_info); 114 } 115 116 /* 117 * smb_sd_read 118 * 119 * Read uid, gid and ACL from filesystem. The returned ACL from read 120 * routine is always in ZFS format. Convert the ZFS acl to a Win acl 121 * and return the Win SD in absolute form. 122 * 123 * NOTE: upon successful return caller MUST free the memory allocated 124 * for the returned SD by calling smb_sd_term(). 125 */ 126 uint32_t 127 smb_sd_read(smb_request_t *sr, smb_sd_t *sd, uint32_t secinfo) 128 { 129 smb_fssd_t fs_sd; 130 smb_node_t *node; 131 uint32_t status = NT_STATUS_SUCCESS; 132 uint32_t sd_flags; 133 int error; 134 135 node = sr->fid_ofile->f_node; 136 sd_flags = smb_node_is_dir(node) ? SMB_FSSD_FLAGS_DIR : 0; 137 smb_fssd_init(&fs_sd, secinfo, sd_flags); 138 139 error = smb_fsop_sdread(sr, sr->user_cr, node, &fs_sd); 140 if (error) 141 return (smb_errno2status(error)); 142 143 status = smb_sd_fromfs(&fs_sd, sd); 144 smb_fssd_term(&fs_sd); 145 146 return (status); 147 } 148 149 /* 150 * smb_sd_write 151 * 152 * Takes a Win SD in absolute form, converts it to 153 * ZFS format and write it to filesystem. The write routine 154 * converts ZFS acl to Posix acl if required. 155 */ 156 uint32_t 157 smb_sd_write(smb_request_t *sr, smb_sd_t *sd, uint32_t secinfo) 158 { 159 smb_node_t *node; 160 smb_fssd_t fs_sd; 161 uint32_t status; 162 uint32_t sd_flags; 163 int error; 164 165 node = sr->fid_ofile->f_node; 166 sd_flags = smb_node_is_dir(node) ? SMB_FSSD_FLAGS_DIR : 0; 167 smb_fssd_init(&fs_sd, secinfo, sd_flags); 168 169 status = smb_sd_tofs(sd, &fs_sd); 170 if (status != NT_STATUS_SUCCESS) { 171 smb_fssd_term(&fs_sd); 172 return (status); 173 } 174 175 error = smb_fsop_sdwrite(sr, sr->user_cr, node, &fs_sd, 0); 176 smb_fssd_term(&fs_sd); 177 178 if (error) { 179 if (error == EBADE) 180 return (NT_STATUS_INVALID_OWNER); 181 return (smb_errno2status(error)); 182 } 183 184 return (NT_STATUS_SUCCESS); 185 } 186 187 188 /* 189 * smb_sd_tofs 190 * 191 * Creates a filesystem security structure based on the given 192 * Windows security descriptor. 193 */ 194 uint32_t 195 smb_sd_tofs(smb_sd_t *sd, smb_fssd_t *fs_sd) 196 { 197 smb_sid_t *sid; 198 uint32_t status = NT_STATUS_SUCCESS; 199 uint16_t sd_control; 200 idmap_stat idm_stat; 201 int idtype; 202 int flags = 0; 203 204 sd_control = sd->sd_control; 205 206 /* 207 * ZFS only has one set of flags so for now only 208 * Windows DACL flags are taken into account. 209 */ 210 if (sd_control & SE_DACL_DEFAULTED) 211 flags |= ACL_DEFAULTED; 212 if (sd_control & SE_DACL_AUTO_INHERITED) 213 flags |= ACL_AUTO_INHERIT; 214 if (sd_control & SE_DACL_PROTECTED) 215 flags |= ACL_PROTECTED; 216 217 if (fs_sd->sd_flags & SMB_FSSD_FLAGS_DIR) 218 flags |= ACL_IS_DIR; 219 220 /* Owner */ 221 if (fs_sd->sd_secinfo & SMB_OWNER_SECINFO) { 222 sid = sd->sd_owner; 223 if (!smb_sid_isvalid(sid)) 224 return (NT_STATUS_INVALID_SID); 225 226 idtype = SMB_IDMAP_USER; 227 idm_stat = smb_idmap_getid(sid, &fs_sd->sd_uid, &idtype); 228 if (idm_stat != IDMAP_SUCCESS) { 229 return (NT_STATUS_NONE_MAPPED); 230 } 231 } 232 233 /* Group */ 234 if (fs_sd->sd_secinfo & SMB_GROUP_SECINFO) { 235 sid = sd->sd_group; 236 if (!smb_sid_isvalid(sid)) 237 return (NT_STATUS_INVALID_SID); 238 239 idtype = SMB_IDMAP_GROUP; 240 idm_stat = smb_idmap_getid(sid, &fs_sd->sd_gid, &idtype); 241 if (idm_stat != IDMAP_SUCCESS) { 242 return (NT_STATUS_NONE_MAPPED); 243 } 244 } 245 246 /* DACL */ 247 if (fs_sd->sd_secinfo & SMB_DACL_SECINFO) { 248 if (sd->sd_control & SE_DACL_PRESENT) { 249 status = smb_acl_to_zfs(sd->sd_dacl, flags, 250 SMB_DACL_SECINFO, &fs_sd->sd_zdacl); 251 if (status != NT_STATUS_SUCCESS) 252 return (status); 253 } 254 else 255 return (NT_STATUS_INVALID_ACL); 256 } 257 258 /* SACL */ 259 if (fs_sd->sd_secinfo & SMB_SACL_SECINFO) { 260 if (sd->sd_control & SE_SACL_PRESENT) { 261 status = smb_acl_to_zfs(sd->sd_sacl, flags, 262 SMB_SACL_SECINFO, &fs_sd->sd_zsacl); 263 if (status != NT_STATUS_SUCCESS) { 264 return (status); 265 } 266 } else { 267 return (NT_STATUS_INVALID_ACL); 268 } 269 } 270 271 return (status); 272 } 273 274 /* 275 * smb_sd_fromfs 276 * 277 * Makes an Windows style security descriptor in absolute form 278 * based on the given filesystem security information. 279 * 280 * Should call smb_sd_term() for the returned sd to free allocated 281 * members. 282 */ 283 static uint32_t 284 smb_sd_fromfs(smb_fssd_t *fs_sd, smb_sd_t *sd) 285 { 286 uint32_t status = NT_STATUS_SUCCESS; 287 smb_acl_t *acl = NULL; 288 smb_sid_t *sid; 289 idmap_stat idm_stat; 290 291 ASSERT(fs_sd); 292 ASSERT(sd); 293 294 smb_sd_init(sd, SECURITY_DESCRIPTOR_REVISION); 295 296 /* Owner */ 297 if (fs_sd->sd_secinfo & SMB_OWNER_SECINFO) { 298 idm_stat = smb_idmap_getsid(fs_sd->sd_uid, 299 SMB_IDMAP_USER, &sid); 300 301 if (idm_stat != IDMAP_SUCCESS) { 302 smb_sd_term(sd); 303 return (NT_STATUS_NONE_MAPPED); 304 } 305 306 sd->sd_owner = sid; 307 } 308 309 /* Group */ 310 if (fs_sd->sd_secinfo & SMB_GROUP_SECINFO) { 311 idm_stat = smb_idmap_getsid(fs_sd->sd_gid, 312 SMB_IDMAP_GROUP, &sid); 313 314 if (idm_stat != IDMAP_SUCCESS) { 315 smb_sd_term(sd); 316 return (NT_STATUS_NONE_MAPPED); 317 } 318 319 sd->sd_group = sid; 320 } 321 322 /* DACL */ 323 if (fs_sd->sd_secinfo & SMB_DACL_SECINFO) { 324 if (fs_sd->sd_zdacl != NULL) { 325 acl = smb_acl_from_zfs(fs_sd->sd_zdacl); 326 if (acl == NULL) { 327 smb_sd_term(sd); 328 return (NT_STATUS_INTERNAL_ERROR); 329 } 330 331 /* 332 * Need to sort the ACL before send it to Windows 333 * clients. Winodws GUI is sensitive about the order 334 * of ACEs. 335 */ 336 smb_acl_sort(acl); 337 smb_sd_set_dacl(sd, acl, B_TRUE, 338 fs_sd->sd_zdacl->acl_flags); 339 } else { 340 smb_sd_set_dacl(sd, NULL, B_FALSE, 0); 341 } 342 } 343 344 /* SACL */ 345 if (fs_sd->sd_secinfo & SMB_SACL_SECINFO) { 346 if (fs_sd->sd_zsacl != NULL) { 347 acl = smb_acl_from_zfs(fs_sd->sd_zsacl); 348 if (acl == NULL) { 349 smb_sd_term(sd); 350 return (NT_STATUS_INTERNAL_ERROR); 351 } 352 353 smb_sd_set_sacl(sd, acl, B_TRUE, 354 fs_sd->sd_zsacl->acl_flags); 355 } else { 356 smb_sd_set_sacl(sd, NULL, B_FALSE, 0); 357 } 358 } 359 360 return (status); 361 } 362 363 static void 364 smb_sd_set_dacl(smb_sd_t *sd, smb_acl_t *acl, boolean_t present, int flags) 365 { 366 ASSERT((sd->sd_control & SE_SELF_RELATIVE) == 0); 367 368 sd->sd_dacl = acl; 369 370 if (flags & ACL_DEFAULTED) 371 sd->sd_control |= SE_DACL_DEFAULTED; 372 if (flags & ACL_AUTO_INHERIT) 373 sd->sd_control |= SE_DACL_AUTO_INHERITED; 374 if (flags & ACL_PROTECTED) 375 sd->sd_control |= SE_DACL_PROTECTED; 376 377 if (present) 378 sd->sd_control |= SE_DACL_PRESENT; 379 } 380 381 static void 382 smb_sd_set_sacl(smb_sd_t *sd, smb_acl_t *acl, boolean_t present, int flags) 383 { 384 ASSERT((sd->sd_control & SE_SELF_RELATIVE) == 0); 385 386 sd->sd_sacl = acl; 387 388 if (flags & ACL_DEFAULTED) 389 sd->sd_control |= SE_SACL_DEFAULTED; 390 if (flags & ACL_AUTO_INHERIT) 391 sd->sd_control |= SE_SACL_AUTO_INHERITED; 392 if (flags & ACL_PROTECTED) 393 sd->sd_control |= SE_SACL_PROTECTED; 394 395 if (present) 396 sd->sd_control |= SE_SACL_PRESENT; 397 } 398 399 /* 400 * smb_fssd_init 401 * 402 * Initializes the given FS SD structure. 403 */ 404 void 405 smb_fssd_init(smb_fssd_t *fs_sd, uint32_t secinfo, uint32_t flags) 406 { 407 bzero(fs_sd, sizeof (smb_fssd_t)); 408 fs_sd->sd_secinfo = secinfo; 409 fs_sd->sd_flags = flags; 410 } 411 412 /* 413 * smb_fssd_term 414 * 415 * Frees allocated memory for acl fields. 416 */ 417 void 418 smb_fssd_term(smb_fssd_t *fs_sd) 419 { 420 ASSERT(fs_sd); 421 422 smb_fsacl_free(fs_sd->sd_zdacl); 423 smb_fsacl_free(fs_sd->sd_zsacl); 424 bzero(fs_sd, sizeof (smb_fssd_t)); 425 } 426