Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * The ASB.1/BER parsing code is derived from ip_nat_snmp_basic.c which was in |
| 3 | * turn derived from the gxsnmp package by Gregory McLean & Jochen Friedrich |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 4 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Copyright (c) 2000 RP Internet (www.rpi.net.au). |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 18 | */ |
| 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/module.h> |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/mm.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include "cifspdu.h" |
| 26 | #include "cifsglob.h" |
| 27 | #include "cifs_debug.h" |
| 28 | #include "cifsproto.h" |
| 29 | |
| 30 | /***************************************************************************** |
| 31 | * |
| 32 | * Basic ASN.1 decoding routines (gxsnmp author Dirk Wisse) |
| 33 | * |
| 34 | *****************************************************************************/ |
| 35 | |
| 36 | /* Class */ |
| 37 | #define ASN1_UNI 0 /* Universal */ |
| 38 | #define ASN1_APL 1 /* Application */ |
| 39 | #define ASN1_CTX 2 /* Context */ |
| 40 | #define ASN1_PRV 3 /* Private */ |
| 41 | |
| 42 | /* Tag */ |
| 43 | #define ASN1_EOC 0 /* End Of Contents or N/A */ |
| 44 | #define ASN1_BOL 1 /* Boolean */ |
| 45 | #define ASN1_INT 2 /* Integer */ |
| 46 | #define ASN1_BTS 3 /* Bit String */ |
| 47 | #define ASN1_OTS 4 /* Octet String */ |
| 48 | #define ASN1_NUL 5 /* Null */ |
| 49 | #define ASN1_OJI 6 /* Object Identifier */ |
| 50 | #define ASN1_OJD 7 /* Object Description */ |
| 51 | #define ASN1_EXT 8 /* External */ |
| 52 | #define ASN1_SEQ 16 /* Sequence */ |
| 53 | #define ASN1_SET 17 /* Set */ |
| 54 | #define ASN1_NUMSTR 18 /* Numerical String */ |
| 55 | #define ASN1_PRNSTR 19 /* Printable String */ |
| 56 | #define ASN1_TEXSTR 20 /* Teletext String */ |
| 57 | #define ASN1_VIDSTR 21 /* Video String */ |
| 58 | #define ASN1_IA5STR 22 /* IA5 String */ |
| 59 | #define ASN1_UNITIM 23 /* Universal Time */ |
| 60 | #define ASN1_GENTIM 24 /* General Time */ |
| 61 | #define ASN1_GRASTR 25 /* Graphical String */ |
| 62 | #define ASN1_VISSTR 26 /* Visible String */ |
| 63 | #define ASN1_GENSTR 27 /* General String */ |
| 64 | |
| 65 | /* Primitive / Constructed methods*/ |
| 66 | #define ASN1_PRI 0 /* Primitive */ |
| 67 | #define ASN1_CON 1 /* Constructed */ |
| 68 | |
| 69 | /* |
| 70 | * Error codes. |
| 71 | */ |
| 72 | #define ASN1_ERR_NOERROR 0 |
| 73 | #define ASN1_ERR_DEC_EMPTY 2 |
| 74 | #define ASN1_ERR_DEC_EOC_MISMATCH 3 |
| 75 | #define ASN1_ERR_DEC_LENGTH_MISMATCH 4 |
| 76 | #define ASN1_ERR_DEC_BADVALUE 5 |
| 77 | |
| 78 | #define SPNEGO_OID_LEN 7 |
| 79 | #define NTLMSSP_OID_LEN 10 |
| 80 | static unsigned long SPNEGO_OID[7] = { 1, 3, 6, 1, 5, 5, 2 }; |
| 81 | static unsigned long NTLMSSP_OID[10] = { 1, 3, 6, 1, 4, 1, 311, 2, 2, 10 }; |
| 82 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 83 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | * ASN.1 context. |
| 85 | */ |
| 86 | struct asn1_ctx { |
| 87 | int error; /* Error condition */ |
| 88 | unsigned char *pointer; /* Octet just to be decoded */ |
| 89 | unsigned char *begin; /* First octet */ |
| 90 | unsigned char *end; /* Octet after last octet */ |
| 91 | }; |
| 92 | |
| 93 | /* |
| 94 | * Octet string (not null terminated) |
| 95 | */ |
| 96 | struct asn1_octstr { |
| 97 | unsigned char *data; |
| 98 | unsigned int len; |
| 99 | }; |
| 100 | |
| 101 | static void |
| 102 | asn1_open(struct asn1_ctx *ctx, unsigned char *buf, unsigned int len) |
| 103 | { |
| 104 | ctx->begin = buf; |
| 105 | ctx->end = buf + len; |
| 106 | ctx->pointer = buf; |
| 107 | ctx->error = ASN1_ERR_NOERROR; |
| 108 | } |
| 109 | |
| 110 | static unsigned char |
| 111 | asn1_octet_decode(struct asn1_ctx *ctx, unsigned char *ch) |
| 112 | { |
| 113 | if (ctx->pointer >= ctx->end) { |
| 114 | ctx->error = ASN1_ERR_DEC_EMPTY; |
| 115 | return 0; |
| 116 | } |
| 117 | *ch = *(ctx->pointer)++; |
| 118 | return 1; |
| 119 | } |
| 120 | |
| 121 | static unsigned char |
| 122 | asn1_tag_decode(struct asn1_ctx *ctx, unsigned int *tag) |
| 123 | { |
| 124 | unsigned char ch; |
| 125 | |
| 126 | *tag = 0; |
| 127 | |
| 128 | do { |
| 129 | if (!asn1_octet_decode(ctx, &ch)) |
| 130 | return 0; |
| 131 | *tag <<= 7; |
| 132 | *tag |= ch & 0x7F; |
| 133 | } while ((ch & 0x80) == 0x80); |
| 134 | return 1; |
| 135 | } |
| 136 | |
| 137 | static unsigned char |
| 138 | asn1_id_decode(struct asn1_ctx *ctx, |
| 139 | unsigned int *cls, unsigned int *con, unsigned int *tag) |
| 140 | { |
| 141 | unsigned char ch; |
| 142 | |
| 143 | if (!asn1_octet_decode(ctx, &ch)) |
| 144 | return 0; |
| 145 | |
| 146 | *cls = (ch & 0xC0) >> 6; |
| 147 | *con = (ch & 0x20) >> 5; |
| 148 | *tag = (ch & 0x1F); |
| 149 | |
| 150 | if (*tag == 0x1F) { |
| 151 | if (!asn1_tag_decode(ctx, tag)) |
| 152 | return 0; |
| 153 | } |
| 154 | return 1; |
| 155 | } |
| 156 | |
| 157 | static unsigned char |
| 158 | asn1_length_decode(struct asn1_ctx *ctx, unsigned int *def, unsigned int *len) |
| 159 | { |
| 160 | unsigned char ch, cnt; |
| 161 | |
| 162 | if (!asn1_octet_decode(ctx, &ch)) |
| 163 | return 0; |
| 164 | |
| 165 | if (ch == 0x80) |
| 166 | *def = 0; |
| 167 | else { |
| 168 | *def = 1; |
| 169 | |
| 170 | if (ch < 0x80) |
| 171 | *len = ch; |
| 172 | else { |
| 173 | cnt = (unsigned char) (ch & 0x7F); |
| 174 | *len = 0; |
| 175 | |
| 176 | while (cnt > 0) { |
| 177 | if (!asn1_octet_decode(ctx, &ch)) |
| 178 | return 0; |
| 179 | *len <<= 8; |
| 180 | *len |= ch; |
| 181 | cnt--; |
| 182 | } |
| 183 | } |
| 184 | } |
| 185 | return 1; |
| 186 | } |
| 187 | |
| 188 | static unsigned char |
| 189 | asn1_header_decode(struct asn1_ctx *ctx, |
| 190 | unsigned char **eoc, |
| 191 | unsigned int *cls, unsigned int *con, unsigned int *tag) |
| 192 | { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 193 | unsigned int def = 0; |
Steve French | ab2f218 | 2005-09-15 20:44:50 -0700 | [diff] [blame] | 194 | unsigned int len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
| 196 | if (!asn1_id_decode(ctx, cls, con, tag)) |
| 197 | return 0; |
| 198 | |
| 199 | if (!asn1_length_decode(ctx, &def, &len)) |
| 200 | return 0; |
| 201 | |
| 202 | if (def) |
| 203 | *eoc = ctx->pointer + len; |
| 204 | else |
| 205 | *eoc = NULL; |
| 206 | return 1; |
| 207 | } |
| 208 | |
| 209 | static unsigned char |
| 210 | asn1_eoc_decode(struct asn1_ctx *ctx, unsigned char *eoc) |
| 211 | { |
| 212 | unsigned char ch; |
| 213 | |
| 214 | if (eoc == NULL) { |
| 215 | if (!asn1_octet_decode(ctx, &ch)) |
| 216 | return 0; |
| 217 | |
| 218 | if (ch != 0x00) { |
| 219 | ctx->error = ASN1_ERR_DEC_EOC_MISMATCH; |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | if (!asn1_octet_decode(ctx, &ch)) |
| 224 | return 0; |
| 225 | |
| 226 | if (ch != 0x00) { |
| 227 | ctx->error = ASN1_ERR_DEC_EOC_MISMATCH; |
| 228 | return 0; |
| 229 | } |
| 230 | return 1; |
| 231 | } else { |
| 232 | if (ctx->pointer != eoc) { |
| 233 | ctx->error = ASN1_ERR_DEC_LENGTH_MISMATCH; |
| 234 | return 0; |
| 235 | } |
| 236 | return 1; |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | /* static unsigned char asn1_null_decode(struct asn1_ctx *ctx, |
| 241 | unsigned char *eoc) |
| 242 | { |
| 243 | ctx->pointer = eoc; |
| 244 | return 1; |
| 245 | } |
| 246 | |
| 247 | static unsigned char asn1_long_decode(struct asn1_ctx *ctx, |
| 248 | unsigned char *eoc, long *integer) |
| 249 | { |
| 250 | unsigned char ch; |
| 251 | unsigned int len; |
| 252 | |
| 253 | if (!asn1_octet_decode(ctx, &ch)) |
| 254 | return 0; |
| 255 | |
| 256 | *integer = (signed char) ch; |
| 257 | len = 1; |
| 258 | |
| 259 | while (ctx->pointer < eoc) { |
| 260 | if (++len > sizeof(long)) { |
| 261 | ctx->error = ASN1_ERR_DEC_BADVALUE; |
| 262 | return 0; |
| 263 | } |
| 264 | |
| 265 | if (!asn1_octet_decode(ctx, &ch)) |
| 266 | return 0; |
| 267 | |
| 268 | *integer <<= 8; |
| 269 | *integer |= ch; |
| 270 | } |
| 271 | return 1; |
| 272 | } |
| 273 | |
| 274 | static unsigned char asn1_uint_decode(struct asn1_ctx *ctx, |
| 275 | unsigned char *eoc, |
| 276 | unsigned int *integer) |
| 277 | { |
| 278 | unsigned char ch; |
| 279 | unsigned int len; |
| 280 | |
| 281 | if (!asn1_octet_decode(ctx, &ch)) |
| 282 | return 0; |
| 283 | |
| 284 | *integer = ch; |
| 285 | if (ch == 0) |
| 286 | len = 0; |
| 287 | else |
| 288 | len = 1; |
| 289 | |
| 290 | while (ctx->pointer < eoc) { |
| 291 | if (++len > sizeof(unsigned int)) { |
| 292 | ctx->error = ASN1_ERR_DEC_BADVALUE; |
| 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | if (!asn1_octet_decode(ctx, &ch)) |
| 297 | return 0; |
| 298 | |
| 299 | *integer <<= 8; |
| 300 | *integer |= ch; |
| 301 | } |
| 302 | return 1; |
| 303 | } |
| 304 | |
| 305 | static unsigned char asn1_ulong_decode(struct asn1_ctx *ctx, |
| 306 | unsigned char *eoc, |
| 307 | unsigned long *integer) |
| 308 | { |
| 309 | unsigned char ch; |
| 310 | unsigned int len; |
| 311 | |
| 312 | if (!asn1_octet_decode(ctx, &ch)) |
| 313 | return 0; |
| 314 | |
| 315 | *integer = ch; |
| 316 | if (ch == 0) |
| 317 | len = 0; |
| 318 | else |
| 319 | len = 1; |
| 320 | |
| 321 | while (ctx->pointer < eoc) { |
| 322 | if (++len > sizeof(unsigned long)) { |
| 323 | ctx->error = ASN1_ERR_DEC_BADVALUE; |
| 324 | return 0; |
| 325 | } |
| 326 | |
| 327 | if (!asn1_octet_decode(ctx, &ch)) |
| 328 | return 0; |
| 329 | |
| 330 | *integer <<= 8; |
| 331 | *integer |= ch; |
| 332 | } |
| 333 | return 1; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 334 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
| 336 | static unsigned char |
| 337 | asn1_octets_decode(struct asn1_ctx *ctx, |
| 338 | unsigned char *eoc, |
| 339 | unsigned char **octets, unsigned int *len) |
| 340 | { |
| 341 | unsigned char *ptr; |
| 342 | |
| 343 | *len = 0; |
| 344 | |
| 345 | *octets = kmalloc(eoc - ctx->pointer, GFP_ATOMIC); |
| 346 | if (*octets == NULL) { |
| 347 | return 0; |
| 348 | } |
| 349 | |
| 350 | ptr = *octets; |
| 351 | while (ctx->pointer < eoc) { |
| 352 | if (!asn1_octet_decode(ctx, (unsigned char *) ptr++)) { |
| 353 | kfree(*octets); |
| 354 | *octets = NULL; |
| 355 | return 0; |
| 356 | } |
| 357 | (*len)++; |
| 358 | } |
| 359 | return 1; |
| 360 | } */ |
| 361 | |
| 362 | static unsigned char |
| 363 | asn1_subid_decode(struct asn1_ctx *ctx, unsigned long *subid) |
| 364 | { |
| 365 | unsigned char ch; |
| 366 | |
| 367 | *subid = 0; |
| 368 | |
| 369 | do { |
| 370 | if (!asn1_octet_decode(ctx, &ch)) |
| 371 | return 0; |
| 372 | |
| 373 | *subid <<= 7; |
| 374 | *subid |= ch & 0x7F; |
| 375 | } while ((ch & 0x80) == 0x80); |
| 376 | return 1; |
| 377 | } |
| 378 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 379 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | asn1_oid_decode(struct asn1_ctx *ctx, |
| 381 | unsigned char *eoc, unsigned long **oid, unsigned int *len) |
| 382 | { |
| 383 | unsigned long subid; |
| 384 | unsigned int size; |
| 385 | unsigned long *optr; |
| 386 | |
| 387 | size = eoc - ctx->pointer + 1; |
Steve French | 26f5736 | 2007-08-30 22:09:15 +0000 | [diff] [blame^] | 388 | *oid = kmalloc(size * sizeof(unsigned long), GFP_ATOMIC); |
| 389 | if (*oid == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
| 392 | optr = *oid; |
| 393 | |
| 394 | if (!asn1_subid_decode(ctx, &subid)) { |
| 395 | kfree(*oid); |
| 396 | *oid = NULL; |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | if (subid < 40) { |
| 401 | optr[0] = 0; |
| 402 | optr[1] = subid; |
| 403 | } else if (subid < 80) { |
| 404 | optr[0] = 1; |
| 405 | optr[1] = subid - 40; |
| 406 | } else { |
| 407 | optr[0] = 2; |
| 408 | optr[1] = subid - 80; |
| 409 | } |
| 410 | |
| 411 | *len = 2; |
| 412 | optr += 2; |
| 413 | |
| 414 | while (ctx->pointer < eoc) { |
| 415 | if (++(*len) > size) { |
| 416 | ctx->error = ASN1_ERR_DEC_BADVALUE; |
| 417 | kfree(*oid); |
| 418 | *oid = NULL; |
| 419 | return 0; |
| 420 | } |
| 421 | |
| 422 | if (!asn1_subid_decode(ctx, optr++)) { |
| 423 | kfree(*oid); |
| 424 | *oid = NULL; |
| 425 | return 0; |
| 426 | } |
| 427 | } |
| 428 | return 1; |
| 429 | } |
| 430 | |
| 431 | static int |
| 432 | compare_oid(unsigned long *oid1, unsigned int oid1len, |
| 433 | unsigned long *oid2, unsigned int oid2len) |
| 434 | { |
| 435 | unsigned int i; |
| 436 | |
| 437 | if (oid1len != oid2len) |
| 438 | return 0; |
| 439 | else { |
| 440 | for (i = 0; i < oid1len; i++) { |
| 441 | if (oid1[i] != oid2[i]) |
| 442 | return 0; |
| 443 | } |
| 444 | return 1; |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | /* BB check for endian conversion issues here */ |
| 449 | |
| 450 | int |
| 451 | decode_negTokenInit(unsigned char *security_blob, int length, |
| 452 | enum securityEnum *secType) |
| 453 | { |
| 454 | struct asn1_ctx ctx; |
| 455 | unsigned char *end; |
| 456 | unsigned char *sequence_end; |
| 457 | unsigned long *oid = NULL; |
| 458 | unsigned int cls, con, tag, oidlen, rc; |
| 459 | int use_ntlmssp = FALSE; |
| 460 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 461 | *secType = NTLM; /* BB eventually make Kerberos or NLTMSSP the default*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
| 463 | /* cifs_dump_mem(" Received SecBlob ", security_blob, length); */ |
| 464 | |
| 465 | asn1_open(&ctx, security_blob, length); |
| 466 | |
| 467 | if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) { |
Steve French | 26a21b9 | 2006-05-31 18:05:34 +0000 | [diff] [blame] | 468 | cFYI(1, ("Error decoding negTokenInit header")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | return 0; |
| 470 | } else if ((cls != ASN1_APL) || (con != ASN1_CON) |
| 471 | || (tag != ASN1_EOC)) { |
| 472 | cFYI(1, ("cls = %d con = %d tag = %d", cls, con, tag)); |
| 473 | return 0; |
| 474 | } else { |
| 475 | /* remember to free obj->oid */ |
| 476 | rc = asn1_header_decode(&ctx, &end, &cls, &con, &tag); |
| 477 | if (rc) { |
| 478 | if ((tag == ASN1_OJI) && (cls == ASN1_PRI)) { |
| 479 | rc = asn1_oid_decode(&ctx, end, &oid, &oidlen); |
| 480 | if (rc) { |
| 481 | rc = compare_oid(oid, oidlen, |
| 482 | SPNEGO_OID, |
| 483 | SPNEGO_OID_LEN); |
| 484 | kfree(oid); |
| 485 | } |
| 486 | } else |
| 487 | rc = 0; |
| 488 | } |
| 489 | |
| 490 | if (!rc) { |
| 491 | cFYI(1, ("Error decoding negTokenInit header")); |
| 492 | return 0; |
| 493 | } |
| 494 | |
| 495 | if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) { |
Steve French | 26a21b9 | 2006-05-31 18:05:34 +0000 | [diff] [blame] | 496 | cFYI(1, ("Error decoding negTokenInit")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | return 0; |
| 498 | } else if ((cls != ASN1_CTX) || (con != ASN1_CON) |
| 499 | || (tag != ASN1_EOC)) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 500 | cFYI(1, |
| 501 | ("cls = %d con = %d tag = %d end = %p (%d) exit 0", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | cls, con, tag, end, *end)); |
| 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) { |
Steve French | 26a21b9 | 2006-05-31 18:05:34 +0000 | [diff] [blame] | 507 | cFYI(1, ("Error decoding negTokenInit")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | return 0; |
| 509 | } else if ((cls != ASN1_UNI) || (con != ASN1_CON) |
| 510 | || (tag != ASN1_SEQ)) { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 511 | cFYI(1, |
| 512 | ("cls = %d con = %d tag = %d end = %p (%d) exit 1", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | cls, con, tag, end, *end)); |
| 514 | return 0; |
| 515 | } |
| 516 | |
| 517 | if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) { |
Steve French | 26a21b9 | 2006-05-31 18:05:34 +0000 | [diff] [blame] | 518 | cFYI(1, ("Error decoding 2nd part of negTokenInit")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | return 0; |
| 520 | } else if ((cls != ASN1_CTX) || (con != ASN1_CON) |
| 521 | || (tag != ASN1_EOC)) { |
| 522 | cFYI(1, |
| 523 | ("cls = %d con = %d tag = %d end = %p (%d) exit 0", |
| 524 | cls, con, tag, end, *end)); |
| 525 | return 0; |
| 526 | } |
| 527 | |
| 528 | if (asn1_header_decode |
| 529 | (&ctx, &sequence_end, &cls, &con, &tag) == 0) { |
Steve French | 26a21b9 | 2006-05-31 18:05:34 +0000 | [diff] [blame] | 530 | cFYI(1, ("Error decoding 2nd part of negTokenInit")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | return 0; |
| 532 | } else if ((cls != ASN1_UNI) || (con != ASN1_CON) |
| 533 | || (tag != ASN1_SEQ)) { |
| 534 | cFYI(1, |
| 535 | ("cls = %d con = %d tag = %d end = %p (%d) exit 1", |
| 536 | cls, con, tag, end, *end)); |
| 537 | return 0; |
| 538 | } |
| 539 | |
| 540 | while (!asn1_eoc_decode(&ctx, sequence_end)) { |
| 541 | rc = asn1_header_decode(&ctx, &end, &cls, &con, &tag); |
| 542 | if (!rc) { |
| 543 | cFYI(1, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 544 | ("Error decoding negTokenInit hdr exit2")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | return 0; |
| 546 | } |
| 547 | if ((tag == ASN1_OJI) && (con == ASN1_PRI)) { |
| 548 | rc = asn1_oid_decode(&ctx, end, &oid, &oidlen); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 549 | if (rc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | cFYI(1, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 551 | ("OID len = %d oid = 0x%lx 0x%lx " |
| 552 | "0x%lx 0x%lx", |
| 553 | oidlen, *oid, *(oid + 1), |
| 554 | *(oid + 2), *(oid + 3))); |
| 555 | rc = compare_oid(oid, oidlen, |
| 556 | NTLMSSP_OID, NTLMSSP_OID_LEN); |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 557 | kfree(oid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | if (rc) |
| 559 | use_ntlmssp = TRUE; |
| 560 | } |
| 561 | } else { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 562 | cFYI(1, ("Should be an oid what is going on?")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | } |
| 564 | } |
| 565 | |
| 566 | if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) { |
| 567 | cFYI(1, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 568 | ("Error decoding last part negTokenInit exit3")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | return 0; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 570 | } else if ((cls != ASN1_CTX) || (con != ASN1_CON)) { |
| 571 | /* tag = 3 indicating mechListMIC */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | cFYI(1, |
| 573 | ("Exit 4 cls = %d con = %d tag = %d end = %p (%d)", |
| 574 | cls, con, tag, end, *end)); |
| 575 | return 0; |
| 576 | } |
| 577 | if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) { |
| 578 | cFYI(1, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 579 | ("Error decoding last part negTokenInit exit5")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | return 0; |
| 581 | } else if ((cls != ASN1_UNI) || (con != ASN1_CON) |
| 582 | || (tag != ASN1_SEQ)) { |
Steve French | 26f5736 | 2007-08-30 22:09:15 +0000 | [diff] [blame^] | 583 | cFYI(1, ("cls = %d con = %d tag = %d end = %p (%d)", |
| 584 | cls, con, tag, end, *end)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | } |
| 586 | |
| 587 | if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) { |
| 588 | cFYI(1, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 589 | ("Error decoding last part negTokenInit exit 7")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | return 0; |
| 591 | } else if ((cls != ASN1_CTX) || (con != ASN1_CON)) { |
| 592 | cFYI(1, |
| 593 | ("Exit 8 cls = %d con = %d tag = %d end = %p (%d)", |
| 594 | cls, con, tag, end, *end)); |
| 595 | return 0; |
| 596 | } |
| 597 | if (asn1_header_decode(&ctx, &end, &cls, &con, &tag) == 0) { |
| 598 | cFYI(1, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 599 | ("Error decoding last part negTokenInit exit9")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | return 0; |
| 601 | } else if ((cls != ASN1_UNI) || (con != ASN1_PRI) |
| 602 | || (tag != ASN1_GENSTR)) { |
| 603 | cFYI(1, |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 604 | ("Exit10 cls = %d con = %d tag = %d end = %p (%d)", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | cls, con, tag, end, *end)); |
| 606 | return 0; |
| 607 | } |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 608 | cFYI(1, ("Need to call asn1_octets_decode() function for %s", |
| 609 | ctx.pointer)); /* is this UTF-8 or ASCII? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | } |
| 611 | |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 612 | /* if (use_kerberos) |
| 613 | *secType = Kerberos |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | else */ |
| 615 | if (use_ntlmssp) { |
| 616 | *secType = NTLMSSP; |
| 617 | } |
| 618 | |
| 619 | return 1; |
| 620 | } |