1 /* Written by Dr Stephen N Henson (steve (at) openssl.org) for the OpenSSL 2 * project 2000. 3 */ 4 /* ==================================================================== 5 * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 19 * 3. All advertising materials mentioning features or use of this 20 * software must display the following acknowledgment: 21 * "This product includes software developed by the OpenSSL Project 22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 23 * 24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 25 * endorse or promote products derived from this software without 26 * prior written permission. For written permission, please contact 27 * licensing (at) OpenSSL.org. 28 * 29 * 5. Products derived from this software may not be called "OpenSSL" 30 * nor may "OpenSSL" appear in their names without prior written 31 * permission of the OpenSSL Project. 32 * 33 * 6. Redistributions of any form whatsoever must retain the following 34 * acknowledgment: 35 * "This product includes software developed by the OpenSSL Project 36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 37 * 38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 49 * OF THE POSSIBILITY OF SUCH DAMAGE. 50 * ==================================================================== 51 * 52 * This product includes cryptographic software written by Eric Young 53 * (eay (at) cryptsoft.com). This product includes software written by Tim 54 * Hudson (tjh (at) cryptsoft.com). 55 * 56 */ 57 #ifndef HEADER_ASN1T_H 58 #define HEADER_ASN1T_H 59 60 #include <openssl/base.h> 61 #include <openssl/asn1.h> 62 63 #ifdef OPENSSL_BUILD_SHLIBCRYPTO 64 # undef OPENSSL_EXTERN 65 # define OPENSSL_EXTERN OPENSSL_EXPORT 66 #endif 67 68 /* ASN1 template defines, structures and functions */ 69 70 #ifdef __cplusplus 71 extern "C" { 72 #endif 73 74 75 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */ 76 #define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr)) 77 78 79 /* Macros for start and end of ASN1_ITEM definition */ 80 81 #define ASN1_ITEM_start(itname) \ 82 const ASN1_ITEM itname##_it = { 83 84 #define ASN1_ITEM_end(itname) \ 85 }; 86 87 /* Macros to aid ASN1 template writing */ 88 89 #define ASN1_ITEM_TEMPLATE(tname) \ 90 static const ASN1_TEMPLATE tname##_item_tt 91 92 #define ASN1_ITEM_TEMPLATE_END(tname) \ 93 ;\ 94 ASN1_ITEM_start(tname) \ 95 ASN1_ITYPE_PRIMITIVE,\ 96 -1,\ 97 &tname##_item_tt,\ 98 0,\ 99 NULL,\ 100 0,\ 101 #tname \ 102 ASN1_ITEM_end(tname) 103 104 105 /* This is a ASN1 type which just embeds a template */ 106 107 /* This pair helps declare a SEQUENCE. We can do: 108 * 109 * ASN1_SEQUENCE(stname) = { 110 * ... SEQUENCE components ... 111 * } ASN1_SEQUENCE_END(stname) 112 * 113 * This will produce an ASN1_ITEM called stname_it 114 * for a structure called stname. 115 * 116 * If you want the same structure but a different 117 * name then use: 118 * 119 * ASN1_SEQUENCE(itname) = { 120 * ... SEQUENCE components ... 121 * } ASN1_SEQUENCE_END_name(stname, itname) 122 * 123 * This will create an item called itname_it using 124 * a structure called stname. 125 */ 126 127 #define ASN1_SEQUENCE(tname) \ 128 static const ASN1_TEMPLATE tname##_seq_tt[] 129 130 #define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname) 131 132 #define ASN1_SEQUENCE_END_name(stname, tname) \ 133 ;\ 134 ASN1_ITEM_start(tname) \ 135 ASN1_ITYPE_SEQUENCE,\ 136 V_ASN1_SEQUENCE,\ 137 tname##_seq_tt,\ 138 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\ 139 NULL,\ 140 sizeof(stname),\ 141 #stname \ 142 ASN1_ITEM_end(tname) 143 144 #define ASN1_NDEF_SEQUENCE(tname) \ 145 ASN1_SEQUENCE(tname) 146 147 #define ASN1_NDEF_SEQUENCE_cb(tname, cb) \ 148 ASN1_SEQUENCE_cb(tname, cb) 149 150 #define ASN1_SEQUENCE_cb(tname, cb) \ 151 static const ASN1_AUX tname##_aux = {NULL, 0, 0, cb, 0}; \ 152 ASN1_SEQUENCE(tname) 153 154 #define ASN1_BROKEN_SEQUENCE(tname) \ 155 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0}; \ 156 ASN1_SEQUENCE(tname) 157 158 #define ASN1_SEQUENCE_ref(tname, cb) \ 159 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), cb, 0}; \ 160 ASN1_SEQUENCE(tname) 161 162 #define ASN1_SEQUENCE_enc(tname, enc, cb) \ 163 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, cb, offsetof(tname, enc)}; \ 164 ASN1_SEQUENCE(tname) 165 166 #define ASN1_NDEF_SEQUENCE_END(tname) \ 167 ;\ 168 ASN1_ITEM_start(tname) \ 169 ASN1_ITYPE_NDEF_SEQUENCE,\ 170 V_ASN1_SEQUENCE,\ 171 tname##_seq_tt,\ 172 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\ 173 NULL,\ 174 sizeof(tname),\ 175 #tname \ 176 ASN1_ITEM_end(tname) 177 178 #define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname) 179 180 #define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname) 181 182 #define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname) 183 184 #define ASN1_SEQUENCE_END_ref(stname, tname) \ 185 ;\ 186 ASN1_ITEM_start(tname) \ 187 ASN1_ITYPE_SEQUENCE,\ 188 V_ASN1_SEQUENCE,\ 189 tname##_seq_tt,\ 190 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\ 191 &tname##_aux,\ 192 sizeof(stname),\ 193 #stname \ 194 ASN1_ITEM_end(tname) 195 196 #define ASN1_NDEF_SEQUENCE_END_cb(stname, tname) \ 197 ;\ 198 ASN1_ITEM_start(tname) \ 199 ASN1_ITYPE_NDEF_SEQUENCE,\ 200 V_ASN1_SEQUENCE,\ 201 tname##_seq_tt,\ 202 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\ 203 &tname##_aux,\ 204 sizeof(stname),\ 205 #stname \ 206 ASN1_ITEM_end(tname) 207 208 209 /* This pair helps declare a CHOICE type. We can do: 210 * 211 * ASN1_CHOICE(chname) = { 212 * ... CHOICE options ... 213 * ASN1_CHOICE_END(chname) 214 * 215 * This will produce an ASN1_ITEM called chname_it 216 * for a structure called chname. The structure 217 * definition must look like this: 218 * typedef struct { 219 * int type; 220 * union { 221 * ASN1_SOMETHING *opt1; 222 * ASN1_SOMEOTHER *opt2; 223 * } value; 224 * } chname; 225 * 226 * the name of the selector must be 'type'. 227 * to use an alternative selector name use the 228 * ASN1_CHOICE_END_selector() version. 229 */ 230 231 #define ASN1_CHOICE(tname) \ 232 static const ASN1_TEMPLATE tname##_ch_tt[] 233 234 #define ASN1_CHOICE_cb(tname, cb) \ 235 static const ASN1_AUX tname##_aux = {NULL, 0, 0, cb, 0}; \ 236 ASN1_CHOICE(tname) 237 238 #define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname) 239 240 #define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type) 241 242 #define ASN1_CHOICE_END_selector(stname, tname, selname) \ 243 ;\ 244 ASN1_ITEM_start(tname) \ 245 ASN1_ITYPE_CHOICE,\ 246 offsetof(stname,selname) ,\ 247 tname##_ch_tt,\ 248 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\ 249 NULL,\ 250 sizeof(stname),\ 251 #stname \ 252 ASN1_ITEM_end(tname) 253 254 #define ASN1_CHOICE_END_cb(stname, tname, selname) \ 255 ;\ 256 ASN1_ITEM_start(tname) \ 257 ASN1_ITYPE_CHOICE,\ 258 offsetof(stname,selname) ,\ 259 tname##_ch_tt,\ 260 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\ 261 &tname##_aux,\ 262 sizeof(stname),\ 263 #stname \ 264 ASN1_ITEM_end(tname) 265 266 /* This helps with the template wrapper form of ASN1_ITEM */ 267 268 #define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \ 269 (flags), (tag), 0,\ 270 #name, ASN1_ITEM_ref(type) } 271 272 /* These help with SEQUENCE or CHOICE components */ 273 274 /* used to declare other types */ 275 276 #define ASN1_EX_TYPE(flags, tag, stname, field, type) { \ 277 (flags), (tag), offsetof(stname, field),\ 278 #field, ASN1_ITEM_ref(type) } 279 280 /* used when the structure is combined with the parent */ 281 282 #define ASN1_EX_COMBINE(flags, tag, type) { \ 283 (flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) } 284 285 /* implicit and explicit helper macros */ 286 287 #define ASN1_IMP_EX(stname, field, type, tag, ex) \ 288 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type) 289 290 #define ASN1_EXP_EX(stname, field, type, tag, ex) \ 291 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type) 292 293 /* Any defined by macros: the field used is in the table itself */ 294 295 #define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) } 296 #define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) } 297 /* Plain simple type */ 298 #define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type) 299 300 /* OPTIONAL simple type */ 301 #define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type) 302 303 /* IMPLICIT tagged simple type */ 304 #define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0) 305 306 /* IMPLICIT tagged OPTIONAL simple type */ 307 #define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL) 308 309 /* Same as above but EXPLICIT */ 310 311 #define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0) 312 #define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL) 313 314 /* SEQUENCE OF type */ 315 #define ASN1_SEQUENCE_OF(stname, field, type) \ 316 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type) 317 318 /* OPTIONAL SEQUENCE OF */ 319 #define ASN1_SEQUENCE_OF_OPT(stname, field, type) \ 320 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type) 321 322 /* Same as above but for SET OF */ 323 324 #define ASN1_SET_OF(stname, field, type) \ 325 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type) 326 327 #define ASN1_SET_OF_OPT(stname, field, type) \ 328 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type) 329 330 /* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */ 331 332 #define ASN1_IMP_SET_OF(stname, field, type, tag) \ 333 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF) 334 335 #define ASN1_EXP_SET_OF(stname, field, type, tag) \ 336 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF) 337 338 #define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \ 339 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL) 340 341 #define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \ 342 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL) 343 344 #define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \ 345 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF) 346 347 #define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \ 348 ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL) 349 350 #define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \ 351 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF) 352 353 #define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \ 354 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL) 355 356 /* EXPLICIT using indefinite length constructed form */ 357 #define ASN1_NDEF_EXP(stname, field, type, tag) \ 358 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF) 359 360 /* EXPLICIT OPTIONAL using indefinite length constructed form */ 361 #define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \ 362 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF) 363 364 /* Macros for the ASN1_ADB structure */ 365 366 #define ASN1_ADB(name) \ 367 static const ASN1_ADB_TABLE name##_adbtbl[] 368 369 #define ASN1_ADB_END(name, flags, field, app_table, def, none) \ 370 ;\ 371 static const ASN1_ADB name##_adb = {\ 372 flags,\ 373 offsetof(name, field),\ 374 app_table,\ 375 name##_adbtbl,\ 376 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\ 377 def,\ 378 none\ 379 } 380 381 #define ADB_ENTRY(val, template) {val, template} 382 383 #define ASN1_ADB_TEMPLATE(name) \ 384 static const ASN1_TEMPLATE name##_tt 385 386 /* This is the ASN1 template structure that defines 387 * a wrapper round the actual type. It determines the 388 * actual position of the field in the value structure, 389 * various flags such as OPTIONAL and the field name. 390 */ 391 392 struct ASN1_TEMPLATE_st { 393 unsigned long flags; /* Various flags */ 394 long tag; /* tag, not used if no tagging */ 395 unsigned long offset; /* Offset of this field in structure */ 396 #ifndef NO_ASN1_FIELD_NAMES 397 const char *field_name; /* Field name */ 398 #endif 399 ASN1_ITEM_EXP *item; /* Relevant ASN1_ITEM or ASN1_ADB */ 400 }; 401 402 /* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */ 403 404 #define ASN1_TEMPLATE_item(t) (t->item_ptr) 405 #define ASN1_TEMPLATE_adb(t) (t->item_ptr) 406 407 typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE; 408 typedef struct ASN1_ADB_st ASN1_ADB; 409 410 struct ASN1_ADB_st { 411 unsigned long flags; /* Various flags */ 412 unsigned long offset; /* Offset of selector field */ 413 STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */ 414 const ASN1_ADB_TABLE *tbl; /* Table of possible types */ 415 long tblcount; /* Number of entries in tbl */ 416 const ASN1_TEMPLATE *default_tt; /* Type to use if no match */ 417 const ASN1_TEMPLATE *null_tt; /* Type to use if selector is NULL */ 418 }; 419 420 struct ASN1_ADB_TABLE_st { 421 long value; /* NID for an object or value for an int */ 422 const ASN1_TEMPLATE tt; /* item for this value */ 423 }; 424 425 /* template flags */ 426 427 /* Field is optional */ 428 #define ASN1_TFLG_OPTIONAL (0x1) 429 430 /* Field is a SET OF */ 431 #define ASN1_TFLG_SET_OF (0x1 << 1) 432 433 /* Field is a SEQUENCE OF */ 434 #define ASN1_TFLG_SEQUENCE_OF (0x2 << 1) 435 436 /* Special case: this refers to a SET OF that 437 * will be sorted into DER order when encoded *and* 438 * the corresponding STACK will be modified to match 439 * the new order. 440 */ 441 #define ASN1_TFLG_SET_ORDER (0x3 << 1) 442 443 /* Mask for SET OF or SEQUENCE OF */ 444 #define ASN1_TFLG_SK_MASK (0x3 << 1) 445 446 /* These flags mean the tag should be taken from the 447 * tag field. If EXPLICIT then the underlying type 448 * is used for the inner tag. 449 */ 450 451 /* IMPLICIT tagging */ 452 #define ASN1_TFLG_IMPTAG (0x1 << 3) 453 454 455 /* EXPLICIT tagging, inner tag from underlying type */ 456 #define ASN1_TFLG_EXPTAG (0x2 << 3) 457 458 #define ASN1_TFLG_TAG_MASK (0x3 << 3) 459 460 /* context specific IMPLICIT */ 461 #define ASN1_TFLG_IMPLICIT ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT 462 463 /* context specific EXPLICIT */ 464 #define ASN1_TFLG_EXPLICIT ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT 465 466 /* If tagging is in force these determine the 467 * type of tag to use. Otherwise the tag is 468 * determined by the underlying type. These 469 * values reflect the actual octet format. 470 */ 471 472 /* Universal tag */ 473 #define ASN1_TFLG_UNIVERSAL (0x0<<6) 474 /* Application tag */ 475 #define ASN1_TFLG_APPLICATION (0x1<<6) 476 /* Context specific tag */ 477 #define ASN1_TFLG_CONTEXT (0x2<<6) 478 /* Private tag */ 479 #define ASN1_TFLG_PRIVATE (0x3<<6) 480 481 #define ASN1_TFLG_TAG_CLASS (0x3<<6) 482 483 /* These are for ANY DEFINED BY type. In this case 484 * the 'item' field points to an ASN1_ADB structure 485 * which contains a table of values to decode the 486 * relevant type 487 */ 488 489 #define ASN1_TFLG_ADB_MASK (0x3<<8) 490 491 #define ASN1_TFLG_ADB_OID (0x1<<8) 492 493 #define ASN1_TFLG_ADB_INT (0x1<<9) 494 495 /* This flag means a parent structure is passed 496 * instead of the field: this is useful is a 497 * SEQUENCE is being combined with a CHOICE for 498 * example. Since this means the structure and 499 * item name will differ we need to use the 500 * ASN1_CHOICE_END_name() macro for example. 501 */ 502 503 #define ASN1_TFLG_COMBINE (0x1<<10) 504 505 /* This flag when present in a SEQUENCE OF, SET OF 506 * or EXPLICIT causes indefinite length constructed 507 * encoding to be used if required. 508 */ 509 510 #define ASN1_TFLG_NDEF (0x1<<11) 511 512 /* This is the actual ASN1 item itself */ 513 514 struct ASN1_ITEM_st { 515 char itype; /* The item type, primitive, SEQUENCE, CHOICE or extern */ 516 long utype; /* underlying type */ 517 const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains the contents */ 518 long tcount; /* Number of templates if SEQUENCE or CHOICE */ 519 const void *funcs; /* functions that handle this type */ 520 long size; /* Structure size (usually)*/ 521 #ifndef NO_ASN1_FIELD_NAMES 522 const char *sname; /* Structure name */ 523 #endif 524 }; 525 526 /* These are values for the itype field and 527 * determine how the type is interpreted. 528 * 529 * For PRIMITIVE types the underlying type 530 * determines the behaviour if items is NULL. 531 * 532 * Otherwise templates must contain a single 533 * template and the type is treated in the 534 * same way as the type specified in the template. 535 * 536 * For SEQUENCE types the templates field points 537 * to the members, the size field is the 538 * structure size. 539 * 540 * For CHOICE types the templates field points 541 * to each possible member (typically a union) 542 * and the 'size' field is the offset of the 543 * selector. 544 * 545 * The 'funcs' field is used for application 546 * specific functions. 547 * 548 * For COMPAT types the funcs field gives a 549 * set of functions that handle this type, this 550 * supports the old d2i, i2d convention. 551 * 552 * The EXTERN type uses a new style d2i/i2d. 553 * The new style should be used where possible 554 * because it avoids things like the d2i IMPLICIT 555 * hack. 556 * 557 * MSTRING is a multiple string type, it is used 558 * for a CHOICE of character strings where the 559 * actual strings all occupy an ASN1_STRING 560 * structure. In this case the 'utype' field 561 * has a special meaning, it is used as a mask 562 * of acceptable types using the B_ASN1 constants. 563 * 564 * NDEF_SEQUENCE is the same as SEQUENCE except 565 * that it will use indefinite length constructed 566 * encoding if requested. 567 * 568 */ 569 570 #define ASN1_ITYPE_PRIMITIVE 0x0 571 572 #define ASN1_ITYPE_SEQUENCE 0x1 573 574 #define ASN1_ITYPE_CHOICE 0x2 575 576 #define ASN1_ITYPE_COMPAT 0x3 577 578 #define ASN1_ITYPE_EXTERN 0x4 579 580 #define ASN1_ITYPE_MSTRING 0x5 581 582 #define ASN1_ITYPE_NDEF_SEQUENCE 0x6 583 584 /* Cache for ASN1 tag and length, so we 585 * don't keep re-reading it for things 586 * like CHOICE 587 */ 588 589 struct ASN1_TLC_st{ 590 char valid; /* Values below are valid */ 591 int ret; /* return value */ 592 long plen; /* length */ 593 int ptag; /* class value */ 594 int pclass; /* class value */ 595 int hdrlen; /* header length */ 596 }; 597 598 /* Typedefs for ASN1 function pointers */ 599 600 typedef ASN1_VALUE * ASN1_new_func(void); 601 typedef void ASN1_free_func(ASN1_VALUE *a); 602 typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, const unsigned char ** in, long length); 603 typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in); 604 605 typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it, 606 int tag, int aclass, char opt, ASN1_TLC *ctx); 607 608 typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass); 609 typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it); 610 typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it); 611 612 typedef int ASN1_ex_print_func(BIO *out, ASN1_VALUE **pval, 613 int indent, const char *fname, 614 const ASN1_PCTX *pctx); 615 616 typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it); 617 typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it); 618 typedef int ASN1_primitive_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent, const ASN1_PCTX *pctx); 619 620 typedef struct ASN1_COMPAT_FUNCS_st { 621 ASN1_new_func *asn1_new; 622 ASN1_free_func *asn1_free; 623 ASN1_d2i_func *asn1_d2i; 624 ASN1_i2d_func *asn1_i2d; 625 } ASN1_COMPAT_FUNCS; 626 627 typedef struct ASN1_EXTERN_FUNCS_st { 628 void *app_data; 629 ASN1_ex_new_func *asn1_ex_new; 630 ASN1_ex_free_func *asn1_ex_free; 631 ASN1_ex_free_func *asn1_ex_clear; 632 ASN1_ex_d2i *asn1_ex_d2i; 633 ASN1_ex_i2d *asn1_ex_i2d; 634 /* asn1_ex_print is unused. */ 635 ASN1_ex_print_func *asn1_ex_print; 636 } ASN1_EXTERN_FUNCS; 637 638 typedef struct ASN1_PRIMITIVE_FUNCS_st { 639 void *app_data; 640 unsigned long flags; 641 ASN1_ex_new_func *prim_new; 642 ASN1_ex_free_func *prim_free; 643 ASN1_ex_free_func *prim_clear; 644 ASN1_primitive_c2i *prim_c2i; 645 ASN1_primitive_i2c *prim_i2c; 646 ASN1_primitive_print *prim_print; 647 } ASN1_PRIMITIVE_FUNCS; 648 649 /* This is the ASN1_AUX structure: it handles various 650 * miscellaneous requirements. For example the use of 651 * reference counts and an informational callback. 652 * 653 * The "informational callback" is called at various 654 * points during the ASN1 encoding and decoding. It can 655 * be used to provide minor customisation of the structures 656 * used. This is most useful where the supplied routines 657 * *almost* do the right thing but need some extra help 658 * at a few points. If the callback returns zero then 659 * it is assumed a fatal error has occurred and the 660 * main operation should be abandoned. 661 * 662 * If major changes in the default behaviour are required 663 * then an external type is more appropriate. 664 */ 665 666 typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it, 667 void *exarg); 668 669 typedef struct ASN1_AUX_st { 670 void *app_data; 671 int flags; 672 int ref_offset; /* Offset of reference value */ 673 ASN1_aux_cb *asn1_cb; 674 int enc_offset; /* Offset of ASN1_ENCODING structure */ 675 } ASN1_AUX; 676 677 /* For print related callbacks exarg points to this structure */ 678 typedef struct ASN1_PRINT_ARG_st { 679 BIO *out; 680 int indent; 681 const ASN1_PCTX *pctx; 682 } ASN1_PRINT_ARG; 683 684 /* For streaming related callbacks exarg points to this structure */ 685 typedef struct ASN1_STREAM_ARG_st { 686 /* BIO to stream through */ 687 BIO *out; 688 /* BIO with filters appended */ 689 BIO *ndef_bio; 690 /* Streaming I/O boundary */ 691 unsigned char **boundary; 692 } ASN1_STREAM_ARG; 693 694 /* Flags in ASN1_AUX */ 695 696 /* Use a reference count */ 697 #define ASN1_AFLG_REFCOUNT 1 698 /* Save the encoding of structure (useful for signatures) */ 699 #define ASN1_AFLG_ENCODING 2 700 /* The Sequence length is invalid */ 701 #define ASN1_AFLG_BROKEN 4 702 703 /* operation values for asn1_cb */ 704 705 #define ASN1_OP_NEW_PRE 0 706 #define ASN1_OP_NEW_POST 1 707 #define ASN1_OP_FREE_PRE 2 708 #define ASN1_OP_FREE_POST 3 709 #define ASN1_OP_D2I_PRE 4 710 #define ASN1_OP_D2I_POST 5 711 #define ASN1_OP_I2D_PRE 6 712 #define ASN1_OP_I2D_POST 7 713 #define ASN1_OP_PRINT_PRE 8 714 #define ASN1_OP_PRINT_POST 9 715 #define ASN1_OP_STREAM_PRE 10 716 #define ASN1_OP_STREAM_POST 11 717 #define ASN1_OP_DETACHED_PRE 12 718 #define ASN1_OP_DETACHED_POST 13 719 720 /* Macro to implement a primitive type */ 721 #define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0) 722 #define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \ 723 ASN1_ITEM_start(itname) \ 724 ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \ 725 ASN1_ITEM_end(itname) 726 727 /* Macro to implement a multi string type */ 728 #define IMPLEMENT_ASN1_MSTRING(itname, mask) \ 729 ASN1_ITEM_start(itname) \ 730 ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \ 731 ASN1_ITEM_end(itname) 732 733 /* Macro to implement an ASN1_ITEM in terms of old style funcs */ 734 735 #define IMPLEMENT_COMPAT_ASN1(sname) IMPLEMENT_COMPAT_ASN1_type(sname, V_ASN1_SEQUENCE) 736 737 #define IMPLEMENT_COMPAT_ASN1_type(sname, tag) \ 738 static const ASN1_COMPAT_FUNCS sname##_ff = { \ 739 (ASN1_new_func *)sname##_new, \ 740 (ASN1_free_func *)sname##_free, \ 741 (ASN1_d2i_func *)d2i_##sname, \ 742 (ASN1_i2d_func *)i2d_##sname, \ 743 }; \ 744 ASN1_ITEM_start(sname) \ 745 ASN1_ITYPE_COMPAT, \ 746 tag, \ 747 NULL, \ 748 0, \ 749 &sname##_ff, \ 750 0, \ 751 #sname \ 752 ASN1_ITEM_end(sname) 753 754 #define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \ 755 ASN1_ITEM_start(sname) \ 756 ASN1_ITYPE_EXTERN, \ 757 tag, \ 758 NULL, \ 759 0, \ 760 &fptrs, \ 761 0, \ 762 #sname \ 763 ASN1_ITEM_end(sname) 764 765 /* Macro to implement standard functions in terms of ASN1_ITEM structures */ 766 767 #define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname) 768 769 #define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname) 770 771 #define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \ 772 IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname) 773 774 #define IMPLEMENT_STATIC_ASN1_ALLOC_FUNCTIONS(stname) \ 775 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(static, stname, stname, stname) 776 777 #define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \ 778 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname) 779 780 #define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(pre, stname, itname, fname) \ 781 pre stname *fname##_new(void) \ 782 { \ 783 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \ 784 } \ 785 pre void fname##_free(stname *a) \ 786 { \ 787 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \ 788 } 789 790 #define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \ 791 stname *fname##_new(void) \ 792 { \ 793 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \ 794 } \ 795 void fname##_free(stname *a) \ 796 { \ 797 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \ 798 } 799 800 #define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \ 801 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \ 802 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) 803 804 #define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \ 805 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \ 806 { \ 807 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\ 808 } \ 809 int i2d_##fname(stname *a, unsigned char **out) \ 810 { \ 811 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\ 812 } 813 814 #define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \ 815 int i2d_##stname##_NDEF(stname *a, unsigned char **out) \ 816 { \ 817 return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\ 818 } 819 820 /* This includes evil casts to remove const: they will go away when full 821 * ASN1 constification is done. 822 */ 823 #define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \ 824 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \ 825 { \ 826 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\ 827 } \ 828 int i2d_##fname(const stname *a, unsigned char **out) \ 829 { \ 830 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\ 831 } 832 833 #define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \ 834 stname * stname##_dup(stname *x) \ 835 { \ 836 return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \ 837 } 838 839 #define IMPLEMENT_ASN1_FUNCTIONS_const(name) \ 840 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name) 841 842 #define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \ 843 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \ 844 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) 845 846 /* external definitions for primitive types */ 847 848 DECLARE_ASN1_ITEM(ASN1_BOOLEAN) 849 DECLARE_ASN1_ITEM(ASN1_TBOOLEAN) 850 DECLARE_ASN1_ITEM(ASN1_FBOOLEAN) 851 DECLARE_ASN1_ITEM(ASN1_SEQUENCE) 852 853 DECLARE_STACK_OF(ASN1_VALUE) 854 855 /* Functions used internally by the ASN1 code */ 856 857 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it); 858 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it); 859 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt); 860 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it); 861 862 void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt); 863 int ASN1_template_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_TEMPLATE *tt); 864 int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it, 865 int tag, int aclass, char opt, ASN1_TLC *ctx); 866 867 int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass); 868 int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt); 869 void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it); 870 871 int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it); 872 int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it); 873 874 int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it); 875 int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it); 876 877 ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt); 878 879 const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr); 880 881 void asn1_refcount_set_one(ASN1_VALUE **pval, const ASN1_ITEM *it); 882 int asn1_refcount_dec_and_test_zero(ASN1_VALUE **pval, const ASN1_ITEM *it); 883 884 void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it); 885 void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it); 886 int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it); 887 int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, const ASN1_ITEM *it); 888 889 #ifdef __cplusplus 890 } 891 #endif 892 #endif 893
