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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <assert.h> 27 #include <strings.h> 28 #include <sys/param.h> 29 30 #include <smbsrv/libsmb.h> 31 #include <smbsrv/libmlrpc.h> 32 33 #ifdef _BIG_ENDIAN 34 static const int ndr_native_byte_order = NDR_REPLAB_INTG_BIG_ENDIAN; 35 #else 36 static const int ndr_native_byte_order = NDR_REPLAB_INTG_LITTLE_ENDIAN; 37 #endif 38 39 static int ndr_decode_hdr_common(ndr_stream_t *, ndr_common_header_t *); 40 41 static int 42 ndr_encode_decode_common(ndr_stream_t *nds, unsigned opnum, 43 ndr_typeinfo_t *ti, void *datum) 44 { 45 int rc; 46 47 /* 48 * Perform the (un)marshalling 49 */ 50 if (ndo_operation(nds, ti, opnum, datum)) 51 return (NDR_DRC_OK); 52 53 switch (nds->error) { 54 case NDR_ERR_MALLOC_FAILED: 55 rc = NDR_DRC_FAULT_OUT_OF_MEMORY; 56 break; 57 58 case NDR_ERR_SWITCH_VALUE_INVALID: 59 rc = NDR_DRC_FAULT_PARAM_0_INVALID; 60 break; 61 62 case NDR_ERR_UNDERFLOW: 63 rc = NDR_DRC_FAULT_RECEIVED_RUNT; 64 break; 65 66 case NDR_ERR_GROW_FAILED: 67 rc = NDR_DRC_FAULT_ENCODE_TOO_BIG; 68 break; 69 70 default: 71 if (nds->m_op == NDR_M_OP_MARSHALL) 72 rc = NDR_DRC_FAULT_ENCODE_FAILED; 73 else 74 rc = NDR_DRC_FAULT_DECODE_FAILED; 75 break; 76 } 77 78 return (rc); 79 } 80 81 ndr_buf_t * 82 ndr_buf_init(ndr_typeinfo_t *ti) 83 { 84 ndr_buf_t *nbuf; 85 86 if ((nbuf = calloc(1, sizeof (ndr_buf_t))) == NULL) 87 return (NULL); 88 89 if ((nbuf->nb_heap = ndr_heap_create()) == NULL) { 90 free(nbuf); 91 return (NULL); 92 } 93 94 nbuf->nb_ti = ti; 95 nbuf->nb_magic = NDR_BUF_MAGIC; 96 return (nbuf); 97 } 98 99 void 100 ndr_buf_fini(ndr_buf_t *nbuf) 101 { 102 assert(nbuf->nb_magic == NDR_BUF_MAGIC); 103 104 nds_destruct(&nbuf->nb_nds); 105 ndr_heap_destroy(nbuf->nb_heap); 106 nbuf->nb_magic = 0; 107 free(nbuf); 108 } 109 110 /* 111 * Decode an NDR encoded buffer. The buffer is expected to contain 112 * a single fragment packet with a valid PDU header followed by NDR 113 * encoded data. The structure to which result points should be 114 * of the appropriate type to hold the decoded output. For example: 115 * 116 * pac_info_t info; 117 * 118 * if ((nbuf = ndr_buf_init(&TYPEINFO(ndr_pac)) != NULL) { 119 * rc = ndr_decode_buf(nbuf, opnum, data, datalen, &info); 120 * ... 121 * ndr_buf_fini(nbuf); 122 * } 123 */ 124 int 125 ndr_buf_decode(ndr_buf_t *nbuf, unsigned opnum, const char *data, 126 size_t datalen, void *result) 127 { 128 ndr_common_header_t hdr; 129 unsigned pdu_size_hint; 130 int rc; 131 132 assert(nbuf->nb_magic == NDR_BUF_MAGIC); 133 assert(nbuf->nb_heap != NULL); 134 assert(nbuf->nb_ti != NULL); 135 136 if (datalen < NDR_PDU_SIZE_HINT_DEFAULT) 137 pdu_size_hint = NDR_PDU_SIZE_HINT_DEFAULT; 138 else 139 pdu_size_hint = datalen; 140 141 rc = nds_initialize(&nbuf->nb_nds, pdu_size_hint, NDR_MODE_BUF_DECODE, 142 nbuf->nb_heap); 143 if (NDR_DRC_IS_FAULT(rc)) 144 return (rc); 145 146 bcopy(data, nbuf->nb_nds.pdu_base_addr, datalen); 147 148 rc = ndr_decode_hdr_common(&nbuf->nb_nds, &hdr); 149 if (NDR_DRC_IS_FAULT(rc)) 150 return (rc); 151 152 if (!NDR_IS_SINGLE_FRAG(hdr.pfc_flags)) 153 return (NDR_DRC_FAULT_DECODE_FAILED); 154 155 rc = ndr_encode_decode_common(&nbuf->nb_nds, opnum, nbuf->nb_ti, 156 result); 157 return (rc); 158 } 159 160 /* 161 * Use the receive stream to unmarshall data (NDR_MODE_CALL_RECV). 162 */ 163 int 164 ndr_decode_call(ndr_xa_t *mxa, void *params) 165 { 166 ndr_stream_t *nds = &mxa->recv_nds; 167 int rc; 168 169 if (!NDR_MODE_MATCH(nds, NDR_MODE_CALL_RECV)) 170 return (NDR_DRC_FAULT_MODE_MISMATCH); 171 172 rc = ndr_encode_decode_common(nds, mxa->opnum, 173 mxa->binding->service->interface_ti, params); 174 175 return (rc + NDR_PTYPE_REQUEST); 176 } 177 178 /* 179 * Use the send stream to marshall data (NDR_MODE_RETURN_SEND). 180 */ 181 int 182 ndr_encode_return(ndr_xa_t *mxa, void *params) 183 { 184 ndr_stream_t *nds = &mxa->send_nds; 185 int rc; 186 187 if (!NDR_MODE_MATCH(nds, NDR_MODE_RETURN_SEND)) 188 return (NDR_DRC_FAULT_MODE_MISMATCH); 189 190 rc = ndr_encode_decode_common(nds, mxa->opnum, 191 mxa->binding->service->interface_ti, params); 192 193 return (rc + NDR_PTYPE_RESPONSE); 194 } 195 196 /* 197 * Use the send stream to marshall data (NDR_MODE_CALL_SEND). 198 */ 199 int 200 ndr_encode_call(ndr_xa_t *mxa, void *params) 201 { 202 ndr_stream_t *nds = &mxa->send_nds; 203 int rc; 204 205 if (!NDR_MODE_MATCH(nds, NDR_MODE_CALL_SEND)) 206 return (NDR_DRC_FAULT_MODE_MISMATCH); 207 208 rc = ndr_encode_decode_common(nds, mxa->opnum, 209 mxa->binding->service->interface_ti, params); 210 211 return (rc + NDR_PTYPE_REQUEST); 212 } 213 214 /* 215 * Use the receive stream to unmarshall data (NDR_MODE_RETURN_RECV). 216 */ 217 int 218 ndr_decode_return(ndr_xa_t *mxa, void *params) 219 { 220 ndr_stream_t *nds = &mxa->recv_nds; 221 int rc; 222 223 if (!NDR_MODE_MATCH(nds, NDR_MODE_RETURN_RECV)) 224 return (NDR_DRC_FAULT_MODE_MISMATCH); 225 226 rc = ndr_encode_decode_common(nds, mxa->opnum, 227 mxa->binding->service->interface_ti, params); 228 229 return (rc + NDR_PTYPE_RESPONSE); 230 } 231 232 int 233 ndr_decode_pdu_hdr(ndr_xa_t *mxa) 234 { 235 ndr_common_header_t *hdr = &mxa->recv_hdr.common_hdr; 236 ndr_stream_t *nds = &mxa->recv_nds; 237 int rc; 238 239 rc = ndr_decode_hdr_common(nds, hdr); 240 if (NDR_DRC_IS_FAULT(rc)) 241 return (rc); 242 243 /* 244 * Verify the protocol version. 245 */ 246 if ((hdr->rpc_vers != 5) || (hdr->rpc_vers_minor != 0)) 247 return (NDR_DRC_PTYPE_RPCHDR(NDR_DRC_FAULT_DECODE_FAILED)); 248 249 mxa->ptype = hdr->ptype; 250 return (NDR_DRC_OK); 251 } 252 253 static int 254 ndr_decode_hdr_common(ndr_stream_t *nds, ndr_common_header_t *hdr) 255 { 256 int ptype; 257 int rc; 258 int charset; 259 int byte_order; 260 261 if (nds->m_op != NDR_M_OP_UNMARSHALL) 262 return (NDR_DRC_PTYPE_RPCHDR(NDR_DRC_FAULT_MODE_MISMATCH)); 263 264 /* 265 * All PDU headers are at least this big 266 */ 267 rc = NDS_GROW_PDU(nds, sizeof (ndr_common_header_t), 0); 268 if (!rc) 269 return (NDR_DRC_PTYPE_RPCHDR(NDR_DRC_FAULT_RECEIVED_RUNT)); 270 271 /* 272 * Peek at the first eight bytes to figure out what we're doing. 273 */ 274 rc = NDS_GET_PDU(nds, 0, 8, (char *)hdr, 0, 0); 275 if (!rc) 276 return (NDR_DRC_PTYPE_RPCHDR(NDR_DRC_FAULT_DECODE_FAILED)); 277 278 /* 279 * Check for ASCII as the character set. This is an ASCII 280 * versus EBCDIC option and has nothing to do with Unicode. 281 */ 282 charset = hdr->packed_drep.intg_char_rep & NDR_REPLAB_CHAR_MASK; 283 if (charset != NDR_REPLAB_CHAR_ASCII) 284 return (NDR_DRC_PTYPE_RPCHDR(NDR_DRC_FAULT_DECODE_FAILED)); 285 286 /* 287 * Set the byte swap flag if the PDU byte-order 288 * is different from the local byte-order. 289 */ 290 byte_order = hdr->packed_drep.intg_char_rep & NDR_REPLAB_INTG_MASK; 291 nds->swap = (byte_order != ndr_native_byte_order) ? 1 : 0; 292 293 ptype = hdr->ptype; 294 if (ptype == NDR_PTYPE_REQUEST && 295 (hdr->pfc_flags & NDR_PFC_OBJECT_UUID) != 0) { 296 ptype = NDR_PTYPE_REQUEST_WITH; /* fake for sizing */ 297 } 298 299 rc = ndr_encode_decode_common(nds, ptype, &TYPEINFO(ndr_hdr), hdr); 300 301 return (NDR_DRC_PTYPE_RPCHDR(rc)); 302 } 303 304 /* 305 * Decode an RPC fragment header. Use ndr_decode_pdu_hdr() to process 306 * the first fragment header then this function to process additional 307 * fragment headers. 308 */ 309 void 310 ndr_decode_frag_hdr(ndr_stream_t *nds, ndr_common_header_t *hdr) 311 { 312 ndr_common_header_t *tmp; 313 uint8_t *pdu; 314 int byte_order; 315 316 pdu = (uint8_t *)nds->pdu_base_offset + nds->pdu_scan_offset; 317 bcopy(pdu, hdr, NDR_RSP_HDR_SIZE); 318 319 /* 320 * Swap non-byte fields if the PDU byte-order 321 * is different from the local byte-order. 322 */ 323 byte_order = hdr->packed_drep.intg_char_rep & NDR_REPLAB_INTG_MASK; 324 325 if (byte_order != ndr_native_byte_order) { 326 /*LINTED E_BAD_PTR_CAST_ALIGN*/ 327 tmp = (ndr_common_header_t *)pdu; 328 329 nds_bswap(&tmp->frag_length, &hdr->frag_length, 330 sizeof (WORD)); 331 nds_bswap(&tmp->auth_length, &hdr->auth_length, 332 sizeof (WORD)); 333 nds_bswap(&tmp->call_id, &hdr->call_id, sizeof (DWORD)); 334 } 335 } 336 337 void 338 ndr_show_hdr(ndr_common_header_t *hdr) 339 { 340 char *fragtype; 341 342 if (hdr == NULL) { 343 ndo_printf(NULL, NULL, "ndr hdr: <null>"); 344 return; 345 } 346 347 if (NDR_IS_SINGLE_FRAG(hdr->pfc_flags)) 348 fragtype = "single"; 349 else if (NDR_IS_FIRST_FRAG(hdr->pfc_flags)) 350 fragtype = "first"; 351 else if (NDR_IS_LAST_FRAG(hdr->pfc_flags)) 352 fragtype = "last"; 353 else 354 fragtype = "intermediate"; 355 356 ndo_printf(NULL, NULL, 357 "ndr hdr: %d.%d ptype=%d, %s frag (flags=0x%08x) len=%d", 358 hdr->rpc_vers, hdr->rpc_vers_minor, hdr->ptype, 359 fragtype, hdr->pfc_flags, hdr->frag_length); 360 } 361 362 int 363 ndr_encode_pdu_hdr(ndr_xa_t *mxa) 364 { 365 ndr_common_header_t *hdr = &mxa->send_hdr.common_hdr; 366 ndr_stream_t *nds = &mxa->send_nds; 367 int ptype; 368 int rc; 369 370 if (nds->m_op != NDR_M_OP_MARSHALL) 371 return (NDR_DRC_PTYPE_RPCHDR(NDR_DRC_FAULT_MODE_MISMATCH)); 372 373 ptype = hdr->ptype; 374 if (ptype == NDR_PTYPE_REQUEST && 375 (hdr->pfc_flags & NDR_PFC_OBJECT_UUID) != 0) { 376 ptype = NDR_PTYPE_REQUEST_WITH; /* fake for sizing */ 377 } 378 379 rc = ndr_encode_decode_common(nds, ptype, &TYPEINFO(ndr_hdr), hdr); 380 381 return (NDR_DRC_PTYPE_RPCHDR(rc)); 382 } 383 384 /* 385 * This is a hand-coded derivative of the automatically generated 386 * (un)marshalling routine for bind_ack headers. bind_ack headers 387 * have an interior conformant array, which is inconsistent with 388 * IDL/NDR rules. 389 */ 390 extern struct ndr_typeinfo ndt__uchar; 391 extern struct ndr_typeinfo ndt__ushort; 392 extern struct ndr_typeinfo ndt__ulong; 393 394 int ndr__ndr_bind_ack_hdr(ndr_ref_t *encl_ref); 395 ndr_typeinfo_t ndt__ndr_bind_ack_hdr = { 396 1, /* NDR version */ 397 3, /* alignment */ 398 NDR_F_STRUCT, /* flags */ 399 ndr__ndr_bind_ack_hdr, /* ndr_func */ 400 68, /* pdu_size_fixed_part */ 401 0, /* pdu_size_variable_part */ 402 68, /* c_size_fixed_part */ 403 0, /* c_size_variable_part */ 404 }; 405 406 /* 407 * [_no_reorder] 408 */ 409 int 410 ndr__ndr_bind_ack_hdr(ndr_ref_t *encl_ref) 411 { 412 ndr_stream_t *nds = encl_ref->stream; 413 struct ndr_bind_ack_hdr *val = /*LINTED E_BAD_PTR_CAST_ALIGN*/ 414 (struct ndr_bind_ack_hdr *)encl_ref->datum; 415 ndr_ref_t myref; 416 unsigned long offset; 417 418 bzero(&myref, sizeof (myref)); 419 myref.enclosing = encl_ref; 420 myref.stream = encl_ref->stream; 421 myref.packed_alignment = 0; 422 423 /* do all members in order */ 424 NDR_MEMBER(_ndr_common_header, common_hdr, 0UL); 425 NDR_MEMBER(_ushort, max_xmit_frag, 16UL); 426 NDR_MEMBER(_ushort, max_recv_frag, 18UL); 427 NDR_MEMBER(_ulong, assoc_group_id, 20UL); 428 429 /* port any is the conformant culprit */ 430 offset = 24UL; 431 432 switch (nds->m_op) { 433 case NDR_M_OP_MARSHALL: 434 val->sec_addr.length = 435 strlen((char *)val->sec_addr.port_spec) + 1; 436 break; 437 438 case NDR_M_OP_UNMARSHALL: 439 break; 440 441 default: 442 NDR_SET_ERROR(encl_ref, NDR_ERR_M_OP_INVALID); 443 return (0); 444 } 445 446 NDR_MEMBER(_ushort, sec_addr.length, offset); 447 NDR_MEMBER_ARR_WITH_DIMENSION(_uchar, sec_addr.port_spec, 448 offset+2UL, val->sec_addr.length); 449 450 offset += 2; 451 offset += val->sec_addr.length; 452 offset += NDR_ALIGN4(offset); 453 454 NDR_MEMBER(_ndr_p_result_list, p_result_list, offset); 455 return (1); 456 } 457 458 /* 459 * Assume a single presentation context element in the result list. 460 */ 461 unsigned 462 ndr_bind_ack_hdr_size(ndr_xa_t *mxa) 463 { 464 ndr_bind_ack_hdr_t *bahdr = &mxa->send_hdr.bind_ack_hdr; 465 unsigned offset; 466 unsigned length; 467 468 /* port any is the conformant culprit */ 469 offset = 24UL; 470 471 length = strlen((char *)bahdr->sec_addr.port_spec) + 1; 472 473 offset += 2; 474 offset += length; 475 offset += NDR_ALIGN4(offset); 476 offset += sizeof (ndr_p_result_list_t); 477 return (offset); 478 } 479 480 /* 481 * This is a hand-coded derivative of the automatically generated 482 * (un)marshalling routine for alter_context_rsp headers. 483 * Alter context response headers have an interior conformant array, 484 * which is inconsistent with IDL/NDR rules. 485 */ 486 int ndr__ndr_alter_context_rsp_hdr(ndr_ref_t *encl_ref); 487 ndr_typeinfo_t ndt__ndr_alter_context_rsp_hdr = { 488 1, /* NDR version */ 489 3, /* alignment */ 490 NDR_F_STRUCT, /* flags */ 491 ndr__ndr_alter_context_rsp_hdr, /* ndr_func */ 492 56, /* pdu_size_fixed_part */ 493 0, /* pdu_size_variable_part */ 494 56, /* c_size_fixed_part */ 495 0, /* c_size_variable_part */ 496 }; 497 498 /* 499 * [_no_reorder] 500 */ 501 int 502 ndr__ndr_alter_context_rsp_hdr(ndr_ref_t *encl_ref) 503 { 504 ndr_stream_t *nds = encl_ref->stream; 505 ndr_alter_context_rsp_hdr_t *val = /*LINTED E_BAD_PTR_CAST_ALIGN*/ 506 (ndr_alter_context_rsp_hdr_t *)encl_ref->datum; 507 ndr_ref_t myref; 508 unsigned long offset; 509 510 bzero(&myref, sizeof (myref)); 511 myref.enclosing = encl_ref; 512 myref.stream = encl_ref->stream; 513 myref.packed_alignment = 0; 514 515 /* do all members in order */ 516 NDR_MEMBER(_ndr_common_header, common_hdr, 0UL); 517 NDR_MEMBER(_ushort, max_xmit_frag, 16UL); 518 NDR_MEMBER(_ushort, max_recv_frag, 18UL); 519 NDR_MEMBER(_ulong, assoc_group_id, 20UL); 520 521 offset = 24UL; /* offset of sec_addr */ 522 523 switch (nds->m_op) { 524 case NDR_M_OP_MARSHALL: 525 val->sec_addr.length = 0; 526 break; 527 528 case NDR_M_OP_UNMARSHALL: 529 break; 530 531 default: 532 NDR_SET_ERROR(encl_ref, NDR_ERR_M_OP_INVALID); 533 return (0); 534 } 535 536 NDR_MEMBER(_ushort, sec_addr.length, offset); 537 NDR_MEMBER_ARR_WITH_DIMENSION(_uchar, sec_addr.port_spec, 538 offset+2UL, val->sec_addr.length); 539 540 offset += 2; /* sizeof (sec_addr.length) */ 541 offset += NDR_ALIGN4(offset); 542 543 NDR_MEMBER(_ndr_p_result_list, p_result_list, offset); 544 return (1); 545 } 546 547 /* 548 * Assume a single presentation context element in the result list. 549 */ 550 unsigned 551 ndr_alter_context_rsp_hdr_size(void) 552 { 553 unsigned offset; 554 555 offset = 24UL; /* offset of sec_addr */ 556 offset += 2; /* sizeof (sec_addr.length) */ 557 offset += NDR_ALIGN4(offset); 558 offset += sizeof (ndr_p_result_list_t); 559 return (offset); 560 } 561