include/openssl/asn1t.h

   1 /*
   2  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   3  * 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000-2005 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58 #ifndef HEADER_ASN1T_H
  59 # define HEADER_ASN1T_H
  60
  61 # include <stddef.h>
  62 # include <openssl/e_os2.h>
  63 # include <openssl/asn1.h>
  64
  65 # ifdef OPENSSL_BUILD_SHLIBCRYPTO
  66 #  undef OPENSSL_EXTERN
  67 #  define OPENSSL_EXTERN OPENSSL_EXPORT
  68 # endif
  69
  70 /* ASN1 template defines, structures and functions */
  71
  72 #ifdef  __cplusplus
  73 extern "C" {
  74 #endif
  75
  76 # ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
  77
  78 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
  79 #  define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr))
  80
  81 /* Macros for start and end of ASN1_ITEM definition */
  82
  83 #  define ASN1_ITEM_start(itname) \
  84         OPENSSL_GLOBAL const ASN1_ITEM itname##_it = {
  85
  86 #  define static_ASN1_ITEM_start(itname) \
  87         static const ASN1_ITEM itname##_it = {
  88
  89 #  define ASN1_ITEM_end(itname)                 \
  90                 };
  91
  92 # else
  93
  94 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
  95 #  define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr()))
  96
  97 /* Macros for start and end of ASN1_ITEM definition */
  98
  99 #  define ASN1_ITEM_start(itname) \
 100         const ASN1_ITEM * itname##_it(void) \
 101         { \
 102                 static const ASN1_ITEM local_it = {
 103
 104 #  define static_ASN1_ITEM_start(itname) \
 105         static ASN1_ITEM_start(itname)
 106
 107 #  define ASN1_ITEM_end(itname) \
 108                 }; \
 109         return &local_it; \
 110         }
 111
 112 # endif
 113
 114 /* Macros to aid ASN1 template writing */
 115
 116 # define ASN1_ITEM_TEMPLATE(tname) \
 117         static const ASN1_TEMPLATE tname##_item_tt
 118
 119 # define ASN1_ITEM_TEMPLATE_END(tname) \
 120         ;\
 121         ASN1_ITEM_start(tname) \
 122                 ASN1_ITYPE_PRIMITIVE,\
 123                 -1,\
 124                 &tname##_item_tt,\
 125                 0,\
 126                 NULL,\
 127                 0,\
 128                 #tname \
 129         ASN1_ITEM_end(tname)
 130 # define static_ASN1_ITEM_TEMPLATE_END(tname) \
 131         ;\
 132         static_ASN1_ITEM_start(tname) \
 133                 ASN1_ITYPE_PRIMITIVE,\
 134                 -1,\
 135                 &tname##_item_tt,\
 136                 0,\
 137                 NULL,\
 138                 0,\
 139                 #tname \
 140         ASN1_ITEM_end(tname)
 141
 142 /* This is a ASN1 type which just embeds a template */
 143
 144 /*-
 145  * This pair helps declare a SEQUENCE. We can do:
 146  *
 147  *      ASN1_SEQUENCE(stname) = {
 148  *              ... SEQUENCE components ...
 149  *      } ASN1_SEQUENCE_END(stname)
 150  *
 151  *      This will produce an ASN1_ITEM called stname_it
 152  *      for a structure called stname.
 153  *
 154  *      If you want the same structure but a different
 155  *      name then use:
 156  *
 157  *      ASN1_SEQUENCE(itname) = {
 158  *              ... SEQUENCE components ...
 159  *      } ASN1_SEQUENCE_END_name(stname, itname)
 160  *
 161  *      This will create an item called itname_it using
 162  *      a structure called stname.
 163  */
 164
 165 # define ASN1_SEQUENCE(tname) \
 166         static const ASN1_TEMPLATE tname##_seq_tt[]
 167
 168 # define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)
 169
 170 # define static_ASN1_SEQUENCE_END(stname) static_ASN1_SEQUENCE_END_name(stname, stname)
 171
 172 # define ASN1_SEQUENCE_END_name(stname, tname) \
 173         ;\
 174         ASN1_ITEM_start(tname) \
 175                 ASN1_ITYPE_SEQUENCE,\
 176                 V_ASN1_SEQUENCE,\
 177                 tname##_seq_tt,\
 178                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 179                 NULL,\
 180                 sizeof(stname),\
 181                 #stname \
 182         ASN1_ITEM_end(tname)
 183
 184 # define static_ASN1_SEQUENCE_END_name(stname, tname) \
 185         ;\
 186         static_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                 NULL,\
 192                 sizeof(stname),\
 193                 #stname \
 194         ASN1_ITEM_end(tname)
 195
 196 # define ASN1_NDEF_SEQUENCE(tname) \
 197         ASN1_SEQUENCE(tname)
 198
 199 # define ASN1_NDEF_SEQUENCE_cb(tname, cb) \
 200         ASN1_SEQUENCE_cb(tname, cb)
 201
 202 # define ASN1_SEQUENCE_cb(tname, cb) \
 203         static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
 204         ASN1_SEQUENCE(tname)
 205
 206 # define ASN1_BROKEN_SEQUENCE(tname) \
 207         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \
 208         ASN1_SEQUENCE(tname)
 209
 210 # define ASN1_SEQUENCE_ref(tname, cb) \
 211         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), offsetof(tname, lock), cb, 0}; \
 212         ASN1_SEQUENCE(tname)
 213
 214 # define ASN1_SEQUENCE_enc(tname, enc, cb) \
 215         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
 216         ASN1_SEQUENCE(tname)
 217
 218 # define ASN1_NDEF_SEQUENCE_END(tname) \
 219         ;\
 220         ASN1_ITEM_start(tname) \
 221                 ASN1_ITYPE_NDEF_SEQUENCE,\
 222                 V_ASN1_SEQUENCE,\
 223                 tname##_seq_tt,\
 224                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 225                 NULL,\
 226                 sizeof(tname),\
 227                 #tname \
 228         ASN1_ITEM_end(tname)
 229 # define static_ASN1_NDEF_SEQUENCE_END(tname) \
 230         ;\
 231         static_ASN1_ITEM_start(tname)                   \
 232                 ASN1_ITYPE_NDEF_SEQUENCE,\
 233                 V_ASN1_SEQUENCE,\
 234                 tname##_seq_tt,\
 235                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 236                 NULL,\
 237                 sizeof(tname),\
 238                 #tname \
 239         ASN1_ITEM_end(tname)
 240
 241 # define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
 242 # define static_ASN1_BROKEN_SEQUENCE_END(stname) \
 243         static_ASN1_SEQUENCE_END_ref(stname, stname)
 244
 245 # define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
 246
 247 # define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
 248 # define static_ASN1_SEQUENCE_END_cb(stname, tname) static_ASN1_SEQUENCE_END_ref(stname, tname)
 249
 250 # define ASN1_SEQUENCE_END_ref(stname, tname) \
 251         ;\
 252         ASN1_ITEM_start(tname) \
 253                 ASN1_ITYPE_SEQUENCE,\
 254                 V_ASN1_SEQUENCE,\
 255                 tname##_seq_tt,\
 256                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 257                 &tname##_aux,\
 258                 sizeof(stname),\
 259                 #stname \
 260         ASN1_ITEM_end(tname)
 261 # define static_ASN1_SEQUENCE_END_ref(stname, tname) \
 262         ;\
 263         static_ASN1_ITEM_start(tname) \
 264                 ASN1_ITYPE_SEQUENCE,\
 265                 V_ASN1_SEQUENCE,\
 266                 tname##_seq_tt,\
 267                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 268                 &tname##_aux,\
 269                 sizeof(stname),\
 270                 #stname \
 271         ASN1_ITEM_end(tname)
 272
 273 # define ASN1_NDEF_SEQUENCE_END_cb(stname, tname) \
 274         ;\
 275         ASN1_ITEM_start(tname) \
 276                 ASN1_ITYPE_NDEF_SEQUENCE,\
 277                 V_ASN1_SEQUENCE,\
 278                 tname##_seq_tt,\
 279                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 280                 &tname##_aux,\
 281                 sizeof(stname),\
 282                 #stname \
 283         ASN1_ITEM_end(tname)
 284
 285 /*-
 286  * This pair helps declare a CHOICE type. We can do:
 287  *
 288  *      ASN1_CHOICE(chname) = {
 289  *              ... CHOICE options ...
 290  *      ASN1_CHOICE_END(chname)
 291  *
 292  *      This will produce an ASN1_ITEM called chname_it
 293  *      for a structure called chname. The structure
 294  *      definition must look like this:
 295  *      typedef struct {
 296  *              int type;
 297  *              union {
 298  *                      ASN1_SOMETHING *opt1;
 299  *                      ASN1_SOMEOTHER *opt2;
 300  *              } value;
 301  *      } chname;
 302  *
 303  *      the name of the selector must be 'type'.
 304  *      to use an alternative selector name use the
 305  *      ASN1_CHOICE_END_selector() version.
 306  */
 307
 308 # define ASN1_CHOICE(tname) \
 309         static const ASN1_TEMPLATE tname##_ch_tt[]
 310
 311 # define ASN1_CHOICE_cb(tname, cb) \
 312         static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
 313         ASN1_CHOICE(tname)
 314
 315 # define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
 316
 317 # define static_ASN1_CHOICE_END(stname) static_ASN1_CHOICE_END_name(stname, stname)
 318
 319 # define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
 320
 321 # define static_ASN1_CHOICE_END_name(stname, tname) static_ASN1_CHOICE_END_selector(stname, tname, type)
 322
 323 # define ASN1_CHOICE_END_selector(stname, tname, selname) \
 324         ;\
 325         ASN1_ITEM_start(tname) \
 326                 ASN1_ITYPE_CHOICE,\
 327                 offsetof(stname,selname) ,\
 328                 tname##_ch_tt,\
 329                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 330                 NULL,\
 331                 sizeof(stname),\
 332                 #stname \
 333         ASN1_ITEM_end(tname)
 334
 335 # define static_ASN1_CHOICE_END_selector(stname, tname, selname) \
 336         ;\
 337         static_ASN1_ITEM_start(tname) \
 338                 ASN1_ITYPE_CHOICE,\
 339                 offsetof(stname,selname) ,\
 340                 tname##_ch_tt,\
 341                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 342                 NULL,\
 343                 sizeof(stname),\
 344                 #stname \
 345         ASN1_ITEM_end(tname)
 346
 347 # define ASN1_CHOICE_END_cb(stname, tname, selname) \
 348         ;\
 349         ASN1_ITEM_start(tname) \
 350                 ASN1_ITYPE_CHOICE,\
 351                 offsetof(stname,selname) ,\
 352                 tname##_ch_tt,\
 353                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 354                 &tname##_aux,\
 355                 sizeof(stname),\
 356                 #stname \
 357         ASN1_ITEM_end(tname)
 358
 359 /* This helps with the template wrapper form of ASN1_ITEM */
 360
 361 # define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
 362         (flags), (tag), 0,\
 363         #name, ASN1_ITEM_ref(type) }
 364
 365 /* These help with SEQUENCE or CHOICE components */
 366
 367 /* used to declare other types */
 368
 369 # define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
 370         (flags), (tag), offsetof(stname, field),\
 371         #field, ASN1_ITEM_ref(type) }
 372
 373 /* implicit and explicit helper macros */
 374
 375 # define ASN1_IMP_EX(stname, field, type, tag, ex) \
 376                 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
 377
 378 # define ASN1_EXP_EX(stname, field, type, tag, ex) \
 379                 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
 380
 381 /* Any defined by macros: the field used is in the table itself */
 382
 383 # ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
 384 #  define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
 385 #  define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
 386 # else
 387 #  define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, tblname##_adb }
 388 #  define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, tblname##_adb }
 389 # endif
 390 /* Plain simple type */
 391 # define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
 392 /* Embedded simple type */
 393 # define ASN1_EMBED(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_EMBED,0, stname, field, type)
 394
 395 /* OPTIONAL simple type */
 396 # define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 397
 398 /* IMPLICIT tagged simple type */
 399 # define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
 400
 401 /* IMPLICIT tagged OPTIONAL simple type */
 402 # define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
 403
 404 /* Same as above but EXPLICIT */
 405
 406 # define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
 407 # define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
 408
 409 /* SEQUENCE OF type */
 410 # define ASN1_SEQUENCE_OF(stname, field, type) \
 411                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
 412
 413 /* OPTIONAL SEQUENCE OF */
 414 # define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
 415                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 416
 417 /* Same as above but for SET OF */
 418
 419 # define ASN1_SET_OF(stname, field, type) \
 420                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
 421
 422 # define ASN1_SET_OF_OPT(stname, field, type) \
 423                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 424
 425 /* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
 426
 427 # define ASN1_IMP_SET_OF(stname, field, type, tag) \
 428                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
 429
 430 # define ASN1_EXP_SET_OF(stname, field, type, tag) \
 431                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
 432
 433 # define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
 434                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
 435
 436 # define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
 437                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
 438
 439 # define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
 440                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
 441
 442 # define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
 443                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 444
 445 # define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
 446                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
 447
 448 # define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
 449                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 450
 451 /* EXPLICIT using indefinite length constructed form */
 452 # define ASN1_NDEF_EXP(stname, field, type, tag) \
 453                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF)
 454
 455 /* EXPLICIT OPTIONAL using indefinite length constructed form */
 456 # define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \
 457                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF)
 458
 459 /* Macros for the ASN1_ADB structure */
 460
 461 # define ASN1_ADB(name) \
 462         static const ASN1_ADB_TABLE name##_adbtbl[]
 463
 464 # ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
 465
 466 #  define ASN1_ADB_END(name, flags, field, adb_cb, def, none) \
 467         ;\
 468         static const ASN1_ADB name##_adb = {\
 469                 flags,\
 470                 offsetof(name, field),\
 471                 adb_cb,\
 472                 name##_adbtbl,\
 473                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
 474                 def,\
 475                 none\
 476         }
 477
 478 # else
 479
 480 #  define ASN1_ADB_END(name, flags, field, adb_cb, def, none) \
 481         ;\
 482         static const ASN1_ITEM *name##_adb(void) \
 483         { \
 484         static const ASN1_ADB internal_adb = \
 485                 {\
 486                 flags,\
 487                 offsetof(name, field),\
 488                 adb_cb,\
 489                 name##_adbtbl,\
 490                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
 491                 def,\
 492                 none\
 493                 }; \
 494                 return (const ASN1_ITEM *) &internal_adb; \
 495         } \
 496         void dummy_function(void)
 497
 498 # endif
 499
 500 # define ADB_ENTRY(val, template) {val, template}
 501
 502 # define ASN1_ADB_TEMPLATE(name) \
 503         static const ASN1_TEMPLATE name##_tt
 504
 505 /*
 506  * This is the ASN1 template structure that defines a wrapper round the
 507  * actual type. It determines the actual position of the field in the value
 508  * structure, various flags such as OPTIONAL and the field name.
 509  */
 510
 511 struct ASN1_TEMPLATE_st {
 512     unsigned long flags;        /* Various flags */
 513     long tag;                   /* tag, not used if no tagging */
 514     unsigned long offset;       /* Offset of this field in structure */
 515     const char *field_name;     /* Field name */
 516     ASN1_ITEM_EXP *item;        /* Relevant ASN1_ITEM or ASN1_ADB */
 517 };
 518
 519 /* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
 520
 521 # define ASN1_TEMPLATE_item(t) (t->item_ptr)
 522 # define ASN1_TEMPLATE_adb(t) (t->item_ptr)
 523
 524 typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
 525 typedef struct ASN1_ADB_st ASN1_ADB;
 526
 527 struct ASN1_ADB_st {
 528     unsigned long flags;        /* Various flags */
 529     unsigned long offset;       /* Offset of selector field */
 530     int (*adb_cb)(long *psel);  /* Application callback */
 531     const ASN1_ADB_TABLE *tbl;  /* Table of possible types */
 532     long tblcount;              /* Number of entries in tbl */
 533     const ASN1_TEMPLATE *default_tt; /* Type to use if no match */
 534     const ASN1_TEMPLATE *null_tt; /* Type to use if selector is NULL */
 535 };
 536
 537 struct ASN1_ADB_TABLE_st {
 538     long value;                 /* NID for an object or value for an int */
 539     const ASN1_TEMPLATE tt;     /* item for this value */
 540 };
 541
 542 /* template flags */
 543
 544 /* Field is optional */
 545 # define ASN1_TFLG_OPTIONAL      (0x1)
 546
 547 /* Field is a SET OF */
 548 # define ASN1_TFLG_SET_OF        (0x1 << 1)
 549
 550 /* Field is a SEQUENCE OF */
 551 # define ASN1_TFLG_SEQUENCE_OF   (0x2 << 1)
 552
 553 /*
 554  * Special case: this refers to a SET OF that will be sorted into DER order
 555  * when encoded *and* the corresponding STACK will be modified to match the
 556  * new order.
 557  */
 558 # define ASN1_TFLG_SET_ORDER     (0x3 << 1)
 559
 560 /* Mask for SET OF or SEQUENCE OF */
 561 # define ASN1_TFLG_SK_MASK       (0x3 << 1)
 562
 563 /*
 564  * These flags mean the tag should be taken from the tag field. If EXPLICIT
 565  * then the underlying type is used for the inner tag.
 566  */
 567
 568 /* IMPLICIT tagging */
 569 # define ASN1_TFLG_IMPTAG        (0x1 << 3)
 570
 571 /* EXPLICIT tagging, inner tag from underlying type */
 572 # define ASN1_TFLG_EXPTAG        (0x2 << 3)
 573
 574 # define ASN1_TFLG_TAG_MASK      (0x3 << 3)
 575
 576 /* context specific IMPLICIT */
 577 # define ASN1_TFLG_IMPLICIT      ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
 578
 579 /* context specific EXPLICIT */
 580 # define ASN1_TFLG_EXPLICIT      ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
 581
 582 /*
 583  * If tagging is in force these determine the type of tag to use. Otherwise
 584  * the tag is determined by the underlying type. These values reflect the
 585  * actual octet format.
 586  */
 587
 588 /* Universal tag */
 589 # define ASN1_TFLG_UNIVERSAL     (0x0<<6)
 590 /* Application tag */
 591 # define ASN1_TFLG_APPLICATION   (0x1<<6)
 592 /* Context specific tag */
 593 # define ASN1_TFLG_CONTEXT       (0x2<<6)
 594 /* Private tag */
 595 # define ASN1_TFLG_PRIVATE       (0x3<<6)
 596
 597 # define ASN1_TFLG_TAG_CLASS     (0x3<<6)
 598
 599 /*
 600  * These are for ANY DEFINED BY type. In this case the 'item' field points to
 601  * an ASN1_ADB structure which contains a table of values to decode the
 602  * relevant type
 603  */
 604
 605 # define ASN1_TFLG_ADB_MASK      (0x3<<8)
 606
 607 # define ASN1_TFLG_ADB_OID       (0x1<<8)
 608
 609 # define ASN1_TFLG_ADB_INT       (0x1<<9)
 610
 611 /*
 612  * This flag when present in a SEQUENCE OF, SET OF or EXPLICIT causes
 613  * indefinite length constructed encoding to be used if required.
 614  */
 615
 616 # define ASN1_TFLG_NDEF          (0x1<<11)
 617
 618 /* Field is embedded and not a pointer */
 619 # define ASN1_TFLG_EMBED         (0x1 << 12)
 620
 621 /* This is the actual ASN1 item itself */
 622
 623 struct ASN1_ITEM_st {
 624     char itype;                 /* The item type, primitive, SEQUENCE, CHOICE
 625                                  * or extern */
 626     long utype;                 /* underlying type */
 627     const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains
 628                                      * the contents */
 629     long tcount;                /* Number of templates if SEQUENCE or CHOICE */
 630     const void *funcs;          /* functions that handle this type */
 631     long size;                  /* Structure size (usually) */
 632     const char *sname;          /* Structure name */
 633 };
 634
 635 /*-
 636  * These are values for the itype field and
 637  * determine how the type is interpreted.
 638  *
 639  * For PRIMITIVE types the underlying type
 640  * determines the behaviour if items is NULL.
 641  *
 642  * Otherwise templates must contain a single
 643  * template and the type is treated in the
 644  * same way as the type specified in the template.
 645  *
 646  * For SEQUENCE types the templates field points
 647  * to the members, the size field is the
 648  * structure size.
 649  *
 650  * For CHOICE types the templates field points
 651  * to each possible member (typically a union)
 652  * and the 'size' field is the offset of the
 653  * selector.
 654  *
 655  * The 'funcs' field is used for application
 656  * specific functions.
 657  *
 658  * The EXTERN type uses a new style d2i/i2d.
 659  * The new style should be used where possible
 660  * because it avoids things like the d2i IMPLICIT
 661  * hack.
 662  *
 663  * MSTRING is a multiple string type, it is used
 664  * for a CHOICE of character strings where the
 665  * actual strings all occupy an ASN1_STRING
 666  * structure. In this case the 'utype' field
 667  * has a special meaning, it is used as a mask
 668  * of acceptable types using the B_ASN1 constants.
 669  *
 670  * NDEF_SEQUENCE is the same as SEQUENCE except
 671  * that it will use indefinite length constructed
 672  * encoding if requested.
 673  *
 674  */
 675
 676 # define ASN1_ITYPE_PRIMITIVE            0x0
 677
 678 # define ASN1_ITYPE_SEQUENCE             0x1
 679
 680 # define ASN1_ITYPE_CHOICE               0x2
 681
 682 # define ASN1_ITYPE_EXTERN               0x4
 683
 684 # define ASN1_ITYPE_MSTRING              0x5
 685
 686 # define ASN1_ITYPE_NDEF_SEQUENCE        0x6
 687
 688 /*
 689  * Cache for ASN1 tag and length, so we don't keep re-reading it for things
 690  * like CHOICE
 691  */
 692
 693 struct ASN1_TLC_st {
 694     char valid;                 /* Values below are valid */
 695     int ret;                    /* return value */
 696     long plen;                  /* length */
 697     int ptag;                   /* class value */
 698     int pclass;                 /* class value */
 699     int hdrlen;                 /* header length */
 700 };
 701
 702 /* Typedefs for ASN1 function pointers */
 703
 704 typedef ASN1_VALUE *ASN1_new_func(void);
 705 typedef void ASN1_free_func(ASN1_VALUE *a);
 706 typedef ASN1_VALUE *ASN1_d2i_func(ASN1_VALUE **a, const unsigned char **in,
 707                                   long length);
 708 typedef int ASN1_i2d_func(ASN1_VALUE *a, unsigned char **in);
 709
 710 typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
 711                         const ASN1_ITEM *it, int tag, int aclass, char opt,
 712                         ASN1_TLC *ctx);
 713
 714 typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
 715                         const ASN1_ITEM *it, int tag, int aclass);
 716 typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
 717 typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
 718
 719 typedef int ASN1_ex_print_func(BIO *out, ASN1_VALUE **pval,
 720                                int indent, const char *fname,
 721                                const ASN1_PCTX *pctx);
 722
 723 typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont,
 724                                int *putype, const ASN1_ITEM *it);
 725 typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont,
 726                                int len, int utype, char *free_cont,
 727                                const ASN1_ITEM *it);
 728 typedef int ASN1_primitive_print(BIO *out, ASN1_VALUE **pval,
 729                                  const ASN1_ITEM *it, int indent,
 730                                  const ASN1_PCTX *pctx);
 731
 732 typedef struct ASN1_EXTERN_FUNCS_st {
 733     void *app_data;
 734     ASN1_ex_new_func *asn1_ex_new;
 735     ASN1_ex_free_func *asn1_ex_free;
 736     ASN1_ex_free_func *asn1_ex_clear;
 737     ASN1_ex_d2i *asn1_ex_d2i;
 738     ASN1_ex_i2d *asn1_ex_i2d;
 739     ASN1_ex_print_func *asn1_ex_print;
 740 } ASN1_EXTERN_FUNCS;
 741
 742 typedef struct ASN1_PRIMITIVE_FUNCS_st {
 743     void *app_data;
 744     unsigned long flags;
 745     ASN1_ex_new_func *prim_new;
 746     ASN1_ex_free_func *prim_free;
 747     ASN1_ex_free_func *prim_clear;
 748     ASN1_primitive_c2i *prim_c2i;
 749     ASN1_primitive_i2c *prim_i2c;
 750     ASN1_primitive_print *prim_print;
 751 } ASN1_PRIMITIVE_FUNCS;
 752
 753 /*
 754  * This is the ASN1_AUX structure: it handles various miscellaneous
 755  * requirements. For example the use of reference counts and an informational
 756  * callback. The "informational callback" is called at various points during
 757  * the ASN1 encoding and decoding. It can be used to provide minor
 758  * customisation of the structures used. This is most useful where the
 759  * supplied routines *almost* do the right thing but need some extra help at
 760  * a few points. If the callback returns zero then it is assumed a fatal
 761  * error has occurred and the main operation should be abandoned. If major
 762  * changes in the default behaviour are required then an external type is
 763  * more appropriate.
 764  */
 765
 766 typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it,
 767                         void *exarg);
 768
 769 typedef struct ASN1_AUX_st {
 770     void *app_data;
 771     int flags;
 772     int ref_offset;             /* Offset of reference value */
 773     int ref_lock;               /* Lock type to use */
 774     ASN1_aux_cb *asn1_cb;
 775     int enc_offset;             /* Offset of ASN1_ENCODING structure */
 776 } ASN1_AUX;
 777
 778 /* For print related callbacks exarg points to this structure */
 779 typedef struct ASN1_PRINT_ARG_st {
 780     BIO *out;
 781     int indent;
 782     const ASN1_PCTX *pctx;
 783 } ASN1_PRINT_ARG;
 784
 785 /* For streaming related callbacks exarg points to this structure */
 786 typedef struct ASN1_STREAM_ARG_st {
 787     /* BIO to stream through */
 788     BIO *out;
 789     /* BIO with filters appended */
 790     BIO *ndef_bio;
 791     /* Streaming I/O boundary */
 792     unsigned char **boundary;
 793 } ASN1_STREAM_ARG;
 794
 795 /* Flags in ASN1_AUX */
 796
 797 /* Use a reference count */
 798 # define ASN1_AFLG_REFCOUNT      1
 799 /* Save the encoding of structure (useful for signatures) */
 800 # define ASN1_AFLG_ENCODING      2
 801 /* The Sequence length is invalid */
 802 # define ASN1_AFLG_BROKEN        4
 803
 804 /* operation values for asn1_cb */
 805
 806 # define ASN1_OP_NEW_PRE         0
 807 # define ASN1_OP_NEW_POST        1
 808 # define ASN1_OP_FREE_PRE        2
 809 # define ASN1_OP_FREE_POST       3
 810 # define ASN1_OP_D2I_PRE         4
 811 # define ASN1_OP_D2I_POST        5
 812 # define ASN1_OP_I2D_PRE         6
 813 # define ASN1_OP_I2D_POST        7
 814 # define ASN1_OP_PRINT_PRE       8
 815 # define ASN1_OP_PRINT_POST      9
 816 # define ASN1_OP_STREAM_PRE      10
 817 # define ASN1_OP_STREAM_POST     11
 818 # define ASN1_OP_DETACHED_PRE    12
 819 # define ASN1_OP_DETACHED_POST   13
 820
 821 /* Macro to implement a primitive type */
 822 # define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
 823 # define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
 824                                 ASN1_ITEM_start(itname) \
 825                                         ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
 826                                 ASN1_ITEM_end(itname)
 827
 828 /* Macro to implement a multi string type */
 829 # define IMPLEMENT_ASN1_MSTRING(itname, mask) \
 830                                 ASN1_ITEM_start(itname) \
 831                                         ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
 832                                 ASN1_ITEM_end(itname)
 833
 834 # define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
 835         ASN1_ITEM_start(sname) \
 836                 ASN1_ITYPE_EXTERN, \
 837                 tag, \
 838                 NULL, \
 839                 0, \
 840                 &fptrs, \
 841                 0, \
 842                 #sname \
 843         ASN1_ITEM_end(sname)
 844
 845 /* Macro to implement standard functions in terms of ASN1_ITEM structures */
 846
 847 # define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
 848
 849 # define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
 850
 851 # define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
 852                         IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
 853
 854 # define IMPLEMENT_STATIC_ASN1_ALLOC_FUNCTIONS(stname) \
 855                 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(static, stname, stname, stname)
 856
 857 # define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \
 858                 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname)
 859
 860 # define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(pre, stname, itname, fname) \
 861         pre stname *fname##_new(void) \
 862         { \
 863                 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
 864         } \
 865         pre void fname##_free(stname *a) \
 866         { \
 867                 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
 868         }
 869
 870 # define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
 871         stname *fname##_new(void) \
 872         { \
 873                 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
 874         } \
 875         void fname##_free(stname *a) \
 876         { \
 877                 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
 878         }
 879
 880 # define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
 881         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
 882         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
 883
 884 # define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
 885         stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
 886         { \
 887                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
 888         } \
 889         int i2d_##fname(stname *a, unsigned char **out) \
 890         { \
 891                 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
 892         }
 893
 894 # define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \
 895         int i2d_##stname##_NDEF(stname *a, unsigned char **out) \
 896         { \
 897                 return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\
 898         }
 899
 900 # define IMPLEMENT_STATIC_ASN1_ENCODE_FUNCTIONS(stname) \
 901         static stname *d2i_##stname(stname **a, \
 902                                    const unsigned char **in, long len) \
 903         { \
 904                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, \
 905                                                ASN1_ITEM_rptr(stname)); \
 906         } \
 907         static int i2d_##stname(stname *a, unsigned char **out) \
 908         { \
 909                 return ASN1_item_i2d((ASN1_VALUE *)a, out, \
 910                                      ASN1_ITEM_rptr(stname)); \
 911         }
 912
 913 /*
 914  * This includes evil casts to remove const: they will go away when full ASN1
 915  * constification is done.
 916  */
 917 # define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
 918         stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
 919         { \
 920                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
 921         } \
 922         int i2d_##fname(const stname *a, unsigned char **out) \
 923         { \
 924                 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
 925         }
 926
 927 # define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
 928         stname * stname##_dup(stname *x) \
 929         { \
 930         return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
 931         }
 932
 933 # define IMPLEMENT_ASN1_PRINT_FUNCTION(stname) \
 934         IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, stname, stname)
 935
 936 # define IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, itname, fname) \
 937         int fname##_print_ctx(BIO *out, stname *x, int indent, \
 938                                                 const ASN1_PCTX *pctx) \
 939         { \
 940                 return ASN1_item_print(out, (ASN1_VALUE *)x, indent, \
 941                         ASN1_ITEM_rptr(itname), pctx); \
 942         }
 943
 944 # define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
 945                 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
 946
 947 # define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
 948         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
 949         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
 950
 951 /* external definitions for primitive types */
 952
 953 DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
 954 DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
 955 DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
 956 DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
 957 DECLARE_ASN1_ITEM(CBIGNUM)
 958 DECLARE_ASN1_ITEM(BIGNUM)
 959 DECLARE_ASN1_ITEM(LONG)
 960 DECLARE_ASN1_ITEM(ZLONG)
 961
 962 DEFINE_STACK_OF(ASN1_VALUE)
 963
 964 /* Functions used internally by the ASN1 code */
 965
 966 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
 967 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 968
 969 int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
 970                      const ASN1_ITEM *it, int tag, int aclass, char opt,
 971                      ASN1_TLC *ctx);
 972
 973 int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
 974                      const ASN1_ITEM *it, int tag, int aclass);
 975
 976 #ifdef  __cplusplus
 977 }
 978 #endif
 979 #endif