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 nds_initialize(&nbuf->nb_nds, pdu_size_hint, NDR_MODE_BUF_DECODE, 142 nbuf->nb_heap); 143 bcopy(data, nbuf->nb_nds.pdu_base_addr, datalen); 144 145 rc = ndr_decode_hdr_common(&nbuf->nb_nds, &hdr); 146 if (NDR_DRC_IS_FAULT(rc)) 147 return (rc); 148 149 if (!NDR_IS_SINGLE_FRAG(hdr.pfc_flags)) 150 return (rc); 151 152 rc = ndr_encode_decode_common(&nbuf->nb_nds, opnum, nbuf->nb_ti, 153 result); 154 return (rc); 155 } 156 157 /* 158 * Use the receive stream to unmarshall data (NDR_MODE_CALL_RECV). 159 */ 160 int 161 ndr_decode_call(ndr_xa_t *mxa, void *params) 162 { 163 ndr_stream_t *nds = &mxa->recv_nds; 164 int rc; 165 166 if (!NDR_MODE_MATCH(nds, NDR_MODE_CALL_RECV)) 167 return (NDR_DRC_FAULT_MODE_MISMATCH); 168 169 rc = ndr_encode_decode_common(nds, mxa->opnum, 170 mxa->binding->service->interface_ti, params); 171 172 return (rc + NDR_PTYPE_REQUEST); 173 } 174 175 /* 176 * Use the send stream to marshall data (NDR_MODE_RETURN_SEND). 177 */ 178 int 179 ndr_encode_return(ndr_xa_t *mxa, void *params) 180 { 181 ndr_stream_t *nds = &mxa->send_nds; 182 int rc; 183 184 if (!NDR_MODE_MATCH(nds, NDR_MODE_RETURN_SEND)) 185 return (NDR_DRC_FAULT_MODE_MISMATCH); 186 187 rc = ndr_encode_decode_common(nds, mxa->opnum, 188 mxa->binding->service->interface_ti, params); 189 190 return (rc + NDR_PTYPE_RESPONSE); 191 } 192 193 /* 194 * Use the send stream to marshall data (NDR_MODE_CALL_SEND). 195 */ 196 int 197 ndr_encode_call(ndr_xa_t *mxa, void *params) 198 { 199 ndr_stream_t *nds = &mxa->send_nds; 200 int rc; 201 202 if (!NDR_MODE_MATCH(nds, NDR_MODE_CALL_SEND)) 203 return (NDR_DRC_FAULT_MODE_MISMATCH); 204 205 rc = ndr_encode_decode_common(nds, mxa->opnum, 206 mxa->binding->service->interface_ti, params); 207 208 return (rc + NDR_PTYPE_REQUEST); 209 } 210 211 /* 212 * Use the receive stream to unmarshall data (NDR_MODE_RETURN_RECV). 213 */ 214 int 215 ndr_decode_return(ndr_xa_t *mxa, void *params) 216 { 217 ndr_stream_t *nds = &mxa->recv_nds; 218 int rc; 219 220 if (!NDR_MODE_MATCH(nds, NDR_MODE_RETURN_RECV)) 221 return (NDR_DRC_FAULT_MODE_MISMATCH); 222 223 rc = ndr_encode_decode_common(nds, mxa->opnum, 224 mxa->binding->service->interface_ti, params); 225 226 return (rc + NDR_PTYPE_RESPONSE); 227 } 228 229 int 230 ndr_decode_pdu_hdr(ndr_xa_t *mxa) 231 { 232 ndr_common_header_t *hdr = &mxa->recv_hdr.common_hdr; 233 ndr_stream_t *nds = &mxa->recv_nds; 234 int rc; 235 236 rc = ndr_decode_hdr_common(nds, hdr); 237 if (NDR_DRC_IS_FAULT(rc)) 238 return (rc); 239 240 /* 241 * Verify the protocol version. 242 */ 243 if ((hdr->rpc_vers != 5) || (hdr->rpc_vers_minor != 0)) 244 return (NDR_DRC_PTYPE_RPCHDR(NDR_DRC_FAULT_DECODE_FAILED)); 245 246 mxa->ptype = hdr->ptype; 247 return (NDR_DRC_OK); 248 } 249 250 static int 251 ndr_decode_hdr_common(ndr_stream_t *nds, ndr_common_header_t *hdr) 252 { 253 int ptype; 254 int rc; 255 int charset; 256 int byte_order; 257 258 if (nds->m_op != NDR_M_OP_UNMARSHALL) 259 return (NDR_DRC_PTYPE_RPCHDR(NDR_DRC_FAULT_MODE_MISMATCH)); 260 261 /* 262 * All PDU headers are at least this big 263 */ 264 rc = NDS_GROW_PDU(nds, sizeof (ndr_common_header_t), 0); 265 if (!rc) 266 return (NDR_DRC_PTYPE_RPCHDR(NDR_DRC_FAULT_RECEIVED_RUNT)); 267 268 /* 269 * Peek at the first eight bytes to figure out what we're doing. 270 */ 271 rc = NDS_GET_PDU(nds, 0, 8, (char *)hdr, 0, 0); 272 if (!rc) 273 return (NDR_DRC_PTYPE_RPCHDR(NDR_DRC_FAULT_DECODE_FAILED)); 274 275 /* 276 * Check for ASCII as the character set. This is an ASCII 277 * versus EBCDIC option and has nothing to do with Unicode. 278 */ 279 charset = hdr->packed_drep.intg_char_rep & NDR_REPLAB_CHAR_MASK; 280 if (charset != NDR_REPLAB_CHAR_ASCII) 281 return (NDR_DRC_PTYPE_RPCHDR(NDR_DRC_FAULT_DECODE_FAILED)); 282 283 /* 284 * Set the byte swap flag if the PDU byte-order 285 * is different from the local byte-order. 286 */ 287 byte_order = hdr->packed_drep.intg_char_rep & NDR_REPLAB_INTG_MASK; 288 nds->swap = (byte_order != ndr_native_byte_order) ? 1 : 0; 289 290 ptype = hdr->ptype; 291 if (ptype == NDR_PTYPE_REQUEST && 292 (hdr->pfc_flags & NDR_PFC_OBJECT_UUID) != 0) { 293 ptype = NDR_PTYPE_REQUEST_WITH; /* fake for sizing */ 294 } 295 296 rc = ndr_encode_decode_common(nds, ptype, &TYPEINFO(ndr_hdr), hdr); 297 298 return (NDR_DRC_PTYPE_RPCHDR(rc)); 299 } 300 301 /* 302 * Decode an RPC fragment header. Use ndr_decode_pdu_hdr() to process 303 * the first fragment header then this function to process additional 304 * fragment headers. 305 */ 306 void 307 ndr_decode_frag_hdr(ndr_stream_t *nds, ndr_common_header_t *hdr) 308 { 309 ndr_common_header_t *tmp; 310 uint8_t *pdu; 311 int byte_order; 312 313 pdu = (uint8_t *)nds->pdu_base_offset + nds->pdu_scan_offset; 314 bcopy(pdu, hdr, NDR_RSP_HDR_SIZE); 315 316 /* 317 * Swap non-byte fields if the PDU byte-order 318 * is different from the local byte-order. 319 */ 320 byte_order = hdr->packed_drep.intg_char_rep & NDR_REPLAB_INTG_MASK; 321 322 if (byte_order != ndr_native_byte_order) { 323 /*LINTED E_BAD_PTR_CAST_ALIGN*/ 324 tmp = (ndr_common_header_t *)pdu; 325 326 nds_bswap(&tmp->frag_length, &hdr->frag_length, 327 sizeof (WORD)); 328 nds_bswap(&tmp->auth_length, &hdr->auth_length, 329 sizeof (WORD)); 330 nds_bswap(&tmp->call_id, &hdr->call_id, sizeof (DWORD)); 331 } 332 } 333 334 void 335 ndr_show_hdr(ndr_common_header_t *hdr) 336 { 337 char *fragtype; 338 339 if (hdr == NULL) { 340 ndo_printf(NULL, NULL, "ndr hdr: <null>"); 341 return; 342 } 343 344 if (NDR_IS_SINGLE_FRAG(hdr->pfc_flags)) 345 fragtype = "single"; 346 else if (NDR_IS_FIRST_FRAG(hdr->pfc_flags)) 347 fragtype = "first"; 348 else if (NDR_IS_LAST_FRAG(hdr->pfc_flags)) 349 fragtype = "last"; 350 else 351 fragtype = "intermediate"; 352 353 ndo_printf(NULL, NULL, 354 "ndr hdr: %d.%d ptype=%d, %s frag (flags=0x%08x) len=%d", 355 hdr->rpc_vers, hdr->rpc_vers_minor, hdr->ptype, 356 fragtype, hdr->pfc_flags, hdr->frag_length); 357 } 358 359 int 360 ndr_encode_pdu_hdr(ndr_xa_t *mxa) 361 { 362 ndr_common_header_t *hdr = &mxa->send_hdr.common_hdr; 363 ndr_stream_t *nds = &mxa->send_nds; 364 int ptype; 365 int rc; 366 367 if (nds->m_op != NDR_M_OP_MARSHALL) 368 return (NDR_DRC_PTYPE_RPCHDR(NDR_DRC_FAULT_MODE_MISMATCH)); 369 370 ptype = hdr->ptype; 371 if (ptype == NDR_PTYPE_REQUEST && 372 (hdr->pfc_flags & NDR_PFC_OBJECT_UUID) != 0) { 373 ptype = NDR_PTYPE_REQUEST_WITH; /* fake for sizing */ 374 } 375 376 rc = ndr_encode_decode_common(nds, ptype, &TYPEINFO(ndr_hdr), hdr); 377 378 return (NDR_DRC_PTYPE_RPCHDR(rc)); 379 } 380 381 /* 382 * This is a hand-coded derivative of the automatically generated 383 * (un)marshalling routine for bind_ack headers. bind_ack headers 384 * have an interior conformant array, which is inconsistent with 385 * IDL/NDR rules. 386 */ 387 extern struct ndr_typeinfo ndt__uchar; 388 extern struct ndr_typeinfo ndt__ushort; 389 extern struct ndr_typeinfo ndt__ulong; 390 391 int ndr__ndr_bind_ack_hdr(ndr_ref_t *encl_ref); 392 ndr_typeinfo_t ndt__ndr_bind_ack_hdr = { 393 1, /* NDR version */ 394 3, /* alignment */ 395 NDR_F_STRUCT, /* flags */ 396 ndr__ndr_bind_ack_hdr, /* ndr_func */ 397 68, /* pdu_size_fixed_part */ 398 0, /* pdu_size_variable_part */ 399 68, /* c_size_fixed_part */ 400 0, /* c_size_variable_part */ 401 }; 402 403 /* 404 * [_no_reorder] 405 */ 406 int 407 ndr__ndr_bind_ack_hdr(ndr_ref_t *encl_ref) 408 { 409 ndr_stream_t *nds = encl_ref->stream; 410 struct ndr_bind_ack_hdr *val = /*LINTED E_BAD_PTR_CAST_ALIGN*/ 411 (struct ndr_bind_ack_hdr *)encl_ref->datum; 412 ndr_ref_t myref; 413 unsigned long offset; 414 415 bzero(&myref, sizeof (myref)); 416 myref.enclosing = encl_ref; 417 myref.stream = encl_ref->stream; 418 myref.packed_alignment = 0; 419 420 /* do all members in order */ 421 NDR_MEMBER(_ndr_common_header, common_hdr, 0UL); 422 NDR_MEMBER(_ushort, max_xmit_frag, 16UL); 423 NDR_MEMBER(_ushort, max_recv_frag, 18UL); 424 NDR_MEMBER(_ulong, assoc_group_id, 20UL); 425 426 /* port any is the conformant culprit */ 427 offset = 24UL; 428 429 switch (nds->m_op) { 430 case NDR_M_OP_MARSHALL: 431 val->sec_addr.length = 432 strlen((char *)val->sec_addr.port_spec) + 1; 433 break; 434 435 case NDR_M_OP_UNMARSHALL: 436 break; 437 438 default: 439 NDR_SET_ERROR(encl_ref, NDR_ERR_M_OP_INVALID); 440 return (0); 441 } 442 443 NDR_MEMBER(_ushort, sec_addr.length, offset); 444 NDR_MEMBER_ARR_WITH_DIMENSION(_uchar, sec_addr.port_spec, 445 offset+2UL, val->sec_addr.length); 446 447 offset += 2; 448 offset += val->sec_addr.length; 449 offset += NDR_ALIGN4(offset); 450 451 NDR_MEMBER(_ndr_p_result_list, p_result_list, offset); 452 return (1); 453 } 454 455 /* 456 * Assume a single presentation context element in the result list. 457 */ 458 unsigned 459 ndr_bind_ack_hdr_size(ndr_xa_t *mxa) 460 { 461 ndr_bind_ack_hdr_t *bahdr = &mxa->send_hdr.bind_ack_hdr; 462 unsigned offset; 463 unsigned length; 464 465 /* port any is the conformant culprit */ 466 offset = 24UL; 467 468 length = strlen((char *)bahdr->sec_addr.port_spec) + 1; 469 470 offset += 2; 471 offset += length; 472 offset += NDR_ALIGN4(offset); 473 offset += sizeof (ndr_p_result_list_t); 474 return (offset); 475 } 476 477 /* 478 * This is a hand-coded derivative of the automatically generated 479 * (un)marshalling routine for alter_context_rsp headers. 480 * Alter context response headers have an interior conformant array, 481 * which is inconsistent with IDL/NDR rules. 482 */ 483 int ndr__ndr_alter_context_rsp_hdr(ndr_ref_t *encl_ref); 484 ndr_typeinfo_t ndt__ndr_alter_context_rsp_hdr = { 485 1, /* NDR version */ 486 3, /* alignment */ 487 NDR_F_STRUCT, /* flags */ 488 ndr__ndr_alter_context_rsp_hdr, /* ndr_func */ 489 56, /* pdu_size_fixed_part */ 490 0, /* pdu_size_variable_part */ 491 56, /* c_size_fixed_part */ 492 0, /* c_size_variable_part */ 493 }; 494 495 /* 496 * [_no_reorder] 497 */ 498 int 499 ndr__ndr_alter_context_rsp_hdr(ndr_ref_t *encl_ref) 500 { 501 ndr_stream_t *nds = encl_ref->stream; 502 ndr_alter_context_rsp_hdr_t *val = /*LINTED E_BAD_PTR_CAST_ALIGN*/ 503 (ndr_alter_context_rsp_hdr_t *)encl_ref->datum; 504 ndr_ref_t myref; 505 unsigned long offset; 506 507 bzero(&myref, sizeof (myref)); 508 myref.enclosing = encl_ref; 509 myref.stream = encl_ref->stream; 510 myref.packed_alignment = 0; 511 512 /* do all members in order */ 513 NDR_MEMBER(_ndr_common_header, common_hdr, 0UL); 514 NDR_MEMBER(_ushort, max_xmit_frag, 16UL); 515 NDR_MEMBER(_ushort, max_recv_frag, 18UL); 516 NDR_MEMBER(_ulong, assoc_group_id, 20UL); 517 518 offset = 24UL; /* offset of sec_addr */ 519 520 switch (nds->m_op) { 521 case NDR_M_OP_MARSHALL: 522 val->sec_addr.length = 0; 523 break; 524 525 case NDR_M_OP_UNMARSHALL: 526 break; 527 528 default: 529 NDR_SET_ERROR(encl_ref, NDR_ERR_M_OP_INVALID); 530 return (0); 531 } 532 533 NDR_MEMBER(_ushort, sec_addr.length, offset); 534 NDR_MEMBER_ARR_WITH_DIMENSION(_uchar, sec_addr.port_spec, 535 offset+2UL, val->sec_addr.length); 536 537 offset += 2; /* sizeof (sec_addr.length) */ 538 offset += NDR_ALIGN4(offset); 539 540 NDR_MEMBER(_ndr_p_result_list, p_result_list, offset); 541 return (1); 542 } 543 544 /* 545 * Assume a single presentation context element in the result list. 546 */ 547 unsigned 548 ndr_alter_context_rsp_hdr_size(void) 549 { 550 unsigned offset; 551 552 offset = 24UL; /* offset of sec_addr */ 553 offset += 2; /* sizeof (sec_addr.length) */ 554 offset += NDR_ALIGN4(offset); 555 offset += sizeof (ndr_p_result_list_t); 556 return (offset); 557 } 558