include/openssl/asn1t.h

   1 /*
   2  * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #ifndef HEADER_ASN1T_H
  11 # define HEADER_ASN1T_H
  12
  13 # include <stddef.h>
  14 # include <openssl/e_os2.h>
  15 # include <openssl/asn1.h>
  16
  17 # ifdef OPENSSL_BUILD_SHLIBCRYPTO
  18 #  undef OPENSSL_EXTERN
  19 #  define OPENSSL_EXTERN OPENSSL_EXPORT
  20 # endif
  21
  22 /* ASN1 template defines, structures and functions */
  23
  24 #ifdef  __cplusplus
  25 extern "C" {
  26 #endif
  27
  28 # ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
  29
  30 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
  31 #  define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr))
  32
  33 /* Macros for start and end of ASN1_ITEM definition */
  34
  35 #  define ASN1_ITEM_start(itname) \
  36         const ASN1_ITEM itname##_it = {
  37
  38 #  define static_ASN1_ITEM_start(itname) \
  39         static const ASN1_ITEM itname##_it = {
  40
  41 #  define ASN1_ITEM_end(itname)                 \
  42                 };
  43
  44 # else
  45
  46 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
  47 #  define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr()))
  48
  49 /* Macros for start and end of ASN1_ITEM definition */
  50
  51 #  define ASN1_ITEM_start(itname) \
  52         const ASN1_ITEM * itname##_it(void) \
  53         { \
  54                 static const ASN1_ITEM local_it = {
  55
  56 #  define static_ASN1_ITEM_start(itname) \
  57         static ASN1_ITEM_start(itname)
  58
  59 #  define ASN1_ITEM_end(itname) \
  60                 }; \
  61         return &local_it; \
  62         }
  63
  64 # endif
  65
  66 /* Macros to aid ASN1 template writing */
  67
  68 # define ASN1_ITEM_TEMPLATE(tname) \
  69         static const ASN1_TEMPLATE tname##_item_tt
  70
  71 # define ASN1_ITEM_TEMPLATE_END(tname) \
  72         ;\
  73         ASN1_ITEM_start(tname) \
  74                 ASN1_ITYPE_PRIMITIVE,\
  75                 -1,\
  76                 &tname##_item_tt,\
  77                 0,\
  78                 NULL,\
  79                 0,\
  80                 #tname \
  81         ASN1_ITEM_end(tname)
  82 # define static_ASN1_ITEM_TEMPLATE_END(tname) \
  83         ;\
  84         static_ASN1_ITEM_start(tname) \
  85                 ASN1_ITYPE_PRIMITIVE,\
  86                 -1,\
  87                 &tname##_item_tt,\
  88                 0,\
  89                 NULL,\
  90                 0,\
  91                 #tname \
  92         ASN1_ITEM_end(tname)
  93
  94 /* This is a ASN1 type which just embeds a template */
  95
  96 /*-
  97  * This pair helps declare a SEQUENCE. We can do:
  98  *
  99  *      ASN1_SEQUENCE(stname) = {
 100  *              ... SEQUENCE components ...
 101  *      } ASN1_SEQUENCE_END(stname)
 102  *
 103  *      This will produce an ASN1_ITEM called stname_it
 104  *      for a structure called stname.
 105  *
 106  *      If you want the same structure but a different
 107  *      name then use:
 108  *
 109  *      ASN1_SEQUENCE(itname) = {
 110  *              ... SEQUENCE components ...
 111  *      } ASN1_SEQUENCE_END_name(stname, itname)
 112  *
 113  *      This will create an item called itname_it using
 114  *      a structure called stname.
 115  */
 116
 117 # define ASN1_SEQUENCE(tname) \
 118         static const ASN1_TEMPLATE tname##_seq_tt[]
 119
 120 # define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)
 121
 122 # define static_ASN1_SEQUENCE_END(stname) static_ASN1_SEQUENCE_END_name(stname, stname)
 123
 124 # define ASN1_SEQUENCE_END_name(stname, tname) \
 125         ;\
 126         ASN1_ITEM_start(tname) \
 127                 ASN1_ITYPE_SEQUENCE,\
 128                 V_ASN1_SEQUENCE,\
 129                 tname##_seq_tt,\
 130                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 131                 NULL,\
 132                 sizeof(stname),\
 133                 #tname \
 134         ASN1_ITEM_end(tname)
 135
 136 # define static_ASN1_SEQUENCE_END_name(stname, tname) \
 137         ;\
 138         static_ASN1_ITEM_start(tname) \
 139                 ASN1_ITYPE_SEQUENCE,\
 140                 V_ASN1_SEQUENCE,\
 141                 tname##_seq_tt,\
 142                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 143                 NULL,\
 144                 sizeof(stname),\
 145                 #stname \
 146         ASN1_ITEM_end(tname)
 147
 148 # define ASN1_NDEF_SEQUENCE(tname) \
 149         ASN1_SEQUENCE(tname)
 150
 151 # define ASN1_NDEF_SEQUENCE_cb(tname, cb) \
 152         ASN1_SEQUENCE_cb(tname, cb)
 153
 154 # define ASN1_SEQUENCE_cb(tname, cb) \
 155         static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
 156         ASN1_SEQUENCE(tname)
 157
 158 # define ASN1_BROKEN_SEQUENCE(tname) \
 159         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \
 160         ASN1_SEQUENCE(tname)
 161
 162 # define ASN1_SEQUENCE_ref(tname, cb) \
 163         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), offsetof(tname, lock), cb, 0}; \
 164         ASN1_SEQUENCE(tname)
 165
 166 # define ASN1_SEQUENCE_enc(tname, enc, cb) \
 167         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
 168         ASN1_SEQUENCE(tname)
 169
 170 # define ASN1_NDEF_SEQUENCE_END(tname) \
 171         ;\
 172         ASN1_ITEM_start(tname) \
 173                 ASN1_ITYPE_NDEF_SEQUENCE,\
 174                 V_ASN1_SEQUENCE,\
 175                 tname##_seq_tt,\
 176                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 177                 NULL,\
 178                 sizeof(tname),\
 179                 #tname \
 180         ASN1_ITEM_end(tname)
 181 # define static_ASN1_NDEF_SEQUENCE_END(tname) \
 182         ;\
 183         static_ASN1_ITEM_start(tname) \
 184                 ASN1_ITYPE_NDEF_SEQUENCE,\
 185                 V_ASN1_SEQUENCE,\
 186                 tname##_seq_tt,\
 187                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 188                 NULL,\
 189                 sizeof(tname),\
 190                 #tname \
 191         ASN1_ITEM_end(tname)
 192
 193 # define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
 194 # define static_ASN1_BROKEN_SEQUENCE_END(stname) \
 195         static_ASN1_SEQUENCE_END_ref(stname, stname)
 196
 197 # define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
 198
 199 # define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
 200 # define static_ASN1_SEQUENCE_END_cb(stname, tname) static_ASN1_SEQUENCE_END_ref(stname, tname)
 201
 202 # define ASN1_SEQUENCE_END_ref(stname, tname) \
 203         ;\
 204         ASN1_ITEM_start(tname) \
 205                 ASN1_ITYPE_SEQUENCE,\
 206                 V_ASN1_SEQUENCE,\
 207                 tname##_seq_tt,\
 208                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 209                 &tname##_aux,\
 210                 sizeof(stname),\
 211                 #tname \
 212         ASN1_ITEM_end(tname)
 213 # define static_ASN1_SEQUENCE_END_ref(stname, tname) \
 214         ;\
 215         static_ASN1_ITEM_start(tname) \
 216                 ASN1_ITYPE_SEQUENCE,\
 217                 V_ASN1_SEQUENCE,\
 218                 tname##_seq_tt,\
 219                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 220                 &tname##_aux,\
 221                 sizeof(stname),\
 222                 #stname \
 223         ASN1_ITEM_end(tname)
 224
 225 # define ASN1_NDEF_SEQUENCE_END_cb(stname, tname) \
 226         ;\
 227         ASN1_ITEM_start(tname) \
 228                 ASN1_ITYPE_NDEF_SEQUENCE,\
 229                 V_ASN1_SEQUENCE,\
 230                 tname##_seq_tt,\
 231                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 232                 &tname##_aux,\
 233                 sizeof(stname),\
 234                 #stname \
 235         ASN1_ITEM_end(tname)
 236
 237 /*-
 238  * This pair helps declare a CHOICE type. We can do:
 239  *
 240  *      ASN1_CHOICE(chname) = {
 241  *              ... CHOICE options ...
 242  *      ASN1_CHOICE_END(chname)
 243  *
 244  *      This will produce an ASN1_ITEM called chname_it
 245  *      for a structure called chname. The structure
 246  *      definition must look like this:
 247  *      typedef struct {
 248  *              int type;
 249  *              union {
 250  *                      ASN1_SOMETHING *opt1;
 251  *                      ASN1_SOMEOTHER *opt2;
 252  *              } value;
 253  *      } chname;
 254  *
 255  *      the name of the selector must be 'type'.
 256  *      to use an alternative selector name use the
 257  *      ASN1_CHOICE_END_selector() version.
 258  */
 259
 260 # define ASN1_CHOICE(tname) \
 261         static const ASN1_TEMPLATE tname##_ch_tt[]
 262
 263 # define ASN1_CHOICE_cb(tname, cb) \
 264         static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
 265         ASN1_CHOICE(tname)
 266
 267 # define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
 268
 269 # define static_ASN1_CHOICE_END(stname) static_ASN1_CHOICE_END_name(stname, stname)
 270
 271 # define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
 272
 273 # define static_ASN1_CHOICE_END_name(stname, tname) static_ASN1_CHOICE_END_selector(stname, tname, type)
 274
 275 # define ASN1_CHOICE_END_selector(stname, tname, selname) \
 276         ;\
 277         ASN1_ITEM_start(tname) \
 278                 ASN1_ITYPE_CHOICE,\
 279                 offsetof(stname,selname) ,\
 280                 tname##_ch_tt,\
 281                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 282                 NULL,\
 283                 sizeof(stname),\
 284                 #stname \
 285         ASN1_ITEM_end(tname)
 286
 287 # define static_ASN1_CHOICE_END_selector(stname, tname, selname) \
 288         ;\
 289         static_ASN1_ITEM_start(tname) \
 290                 ASN1_ITYPE_CHOICE,\
 291                 offsetof(stname,selname) ,\
 292                 tname##_ch_tt,\
 293                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 294                 NULL,\
 295                 sizeof(stname),\
 296                 #stname \
 297         ASN1_ITEM_end(tname)
 298
 299 # define ASN1_CHOICE_END_cb(stname, tname, selname) \
 300         ;\
 301         ASN1_ITEM_start(tname) \
 302                 ASN1_ITYPE_CHOICE,\
 303                 offsetof(stname,selname) ,\
 304                 tname##_ch_tt,\
 305                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 306                 &tname##_aux,\
 307                 sizeof(stname),\
 308                 #stname \
 309         ASN1_ITEM_end(tname)
 310
 311 /* This helps with the template wrapper form of ASN1_ITEM */
 312
 313 # define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
 314         (flags), (tag), 0,\
 315         #name, ASN1_ITEM_ref(type) }
 316
 317 /* These help with SEQUENCE or CHOICE components */
 318
 319 /* used to declare other types */
 320
 321 # define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
 322         (flags), (tag), offsetof(stname, field),\
 323         #field, ASN1_ITEM_ref(type) }
 324
 325 /* implicit and explicit helper macros */
 326
 327 # define ASN1_IMP_EX(stname, field, type, tag, ex) \
 328                 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
 329
 330 # define ASN1_EXP_EX(stname, field, type, tag, ex) \
 331                 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
 332
 333 /* Any defined by macros: the field used is in the table itself */
 334
 335 # ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
 336 #  define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
 337 #  define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
 338 # else
 339 #  define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, tblname##_adb }
 340 #  define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, tblname##_adb }
 341 # endif
 342 /* Plain simple type */
 343 # define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
 344 /* Embedded simple type */
 345 # define ASN1_EMBED(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_EMBED,0, stname, field, type)
 346
 347 /* OPTIONAL simple type */
 348 # define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 349 # define ASN1_OPT_EMBED(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL|ASN1_TFLG_EMBED, 0, stname, field, type)
 350
 351 /* IMPLICIT tagged simple type */
 352 # define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
 353 # define ASN1_IMP_EMBED(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_EMBED)
 354
 355 /* IMPLICIT tagged OPTIONAL simple type */
 356 # define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
 357 # define ASN1_IMP_OPT_EMBED(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_EMBED)
 358
 359 /* Same as above but EXPLICIT */
 360
 361 # define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
 362 # define ASN1_EXP_EMBED(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_EMBED)
 363 # define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
 364 # define ASN1_EXP_OPT_EMBED(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_EMBED)
 365
 366 /* SEQUENCE OF type */
 367 # define ASN1_SEQUENCE_OF(stname, field, type) \
 368                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
 369
 370 /* OPTIONAL SEQUENCE OF */
 371 # define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
 372                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 373
 374 /* Same as above but for SET OF */
 375
 376 # define ASN1_SET_OF(stname, field, type) \
 377                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
 378
 379 # define ASN1_SET_OF_OPT(stname, field, type) \
 380                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 381
 382 /* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
 383
 384 # define ASN1_IMP_SET_OF(stname, field, type, tag) \
 385                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
 386
 387 # define ASN1_EXP_SET_OF(stname, field, type, tag) \
 388                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
 389
 390 # define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
 391                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
 392
 393 # define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
 394                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
 395
 396 # define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
 397                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
 398
 399 # define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
 400                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 401
 402 # define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
 403                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
 404
 405 # define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
 406                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 407
 408 /* EXPLICIT using indefinite length constructed form */
 409 # define ASN1_NDEF_EXP(stname, field, type, tag) \
 410                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF)
 411
 412 /* EXPLICIT OPTIONAL using indefinite length constructed form */
 413 # define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \
 414                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF)
 415
 416 /* Macros for the ASN1_ADB structure */
 417
 418 # define ASN1_ADB(name) \
 419         static const ASN1_ADB_TABLE name##_adbtbl[]
 420
 421 # ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
 422
 423 #  define ASN1_ADB_END(name, flags, field, adb_cb, def, none) \
 424         ;\
 425         static const ASN1_ADB name##_adb = {\
 426                 flags,\
 427                 offsetof(name, field),\
 428                 adb_cb,\
 429                 name##_adbtbl,\
 430                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
 431                 def,\
 432                 none\
 433         }
 434
 435 # else
 436
 437 #  define ASN1_ADB_END(name, flags, field, adb_cb, def, none) \
 438         ;\
 439         static const ASN1_ITEM *name##_adb(void) \
 440         { \
 441         static const ASN1_ADB internal_adb = \
 442                 {\
 443                 flags,\
 444                 offsetof(name, field),\
 445                 adb_cb,\
 446                 name##_adbtbl,\
 447                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
 448                 def,\
 449                 none\
 450                 }; \
 451                 return (const ASN1_ITEM *) &internal_adb; \
 452         } \
 453         void dummy_function(void)
 454
 455 # endif
 456
 457 # define ADB_ENTRY(val, template) {val, template}
 458
 459 # define ASN1_ADB_TEMPLATE(name) \
 460         static const ASN1_TEMPLATE name##_tt
 461
 462 /*
 463  * This is the ASN1 template structure that defines a wrapper round the
 464  * actual type. It determines the actual position of the field in the value
 465  * structure, various flags such as OPTIONAL and the field name.
 466  */
 467
 468 struct ASN1_TEMPLATE_st {
 469     unsigned long flags;        /* Various flags */
 470     long tag;                   /* tag, not used if no tagging */
 471     unsigned long offset;       /* Offset of this field in structure */
 472     const char *field_name;     /* Field name */
 473     ASN1_ITEM_EXP *item;        /* Relevant ASN1_ITEM or ASN1_ADB */
 474 };
 475
 476 /* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
 477
 478 # define ASN1_TEMPLATE_item(t) (t->item_ptr)
 479 # define ASN1_TEMPLATE_adb(t) (t->item_ptr)
 480
 481 typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
 482 typedef struct ASN1_ADB_st ASN1_ADB;
 483
 484 struct ASN1_ADB_st {
 485     unsigned long flags;        /* Various flags */
 486     unsigned long offset;       /* Offset of selector field */
 487     int (*adb_cb)(long *psel);  /* Application callback */
 488     const ASN1_ADB_TABLE *tbl;  /* Table of possible types */
 489     long tblcount;              /* Number of entries in tbl */
 490     const ASN1_TEMPLATE *default_tt; /* Type to use if no match */
 491     const ASN1_TEMPLATE *null_tt; /* Type to use if selector is NULL */
 492 };
 493
 494 struct ASN1_ADB_TABLE_st {
 495     long value;                 /* NID for an object or value for an int */
 496     const ASN1_TEMPLATE tt;     /* item for this value */
 497 };
 498
 499 /* template flags */
 500
 501 /* Field is optional */
 502 # define ASN1_TFLG_OPTIONAL      (0x1)
 503
 504 /* Field is a SET OF */
 505 # define ASN1_TFLG_SET_OF        (0x1 << 1)
 506
 507 /* Field is a SEQUENCE OF */
 508 # define ASN1_TFLG_SEQUENCE_OF   (0x2 << 1)
 509
 510 /*
 511  * Special case: this refers to a SET OF that will be sorted into DER order
 512  * when encoded *and* the corresponding STACK will be modified to match the
 513  * new order.
 514  */
 515 # define ASN1_TFLG_SET_ORDER     (0x3 << 1)
 516
 517 /* Mask for SET OF or SEQUENCE OF */
 518 # define ASN1_TFLG_SK_MASK       (0x3 << 1)
 519
 520 /*
 521  * These flags mean the tag should be taken from the tag field. If EXPLICIT
 522  * then the underlying type is used for the inner tag.
 523  */
 524
 525 /* IMPLICIT tagging */
 526 # define ASN1_TFLG_IMPTAG        (0x1 << 3)
 527
 528 /* EXPLICIT tagging, inner tag from underlying type */
 529 # define ASN1_TFLG_EXPTAG        (0x2 << 3)
 530
 531 # define ASN1_TFLG_TAG_MASK      (0x3 << 3)
 532
 533 /* context specific IMPLICIT */
 534 # define ASN1_TFLG_IMPLICIT      ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
 535
 536 /* context specific EXPLICIT */
 537 # define ASN1_TFLG_EXPLICIT      ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
 538
 539 /*
 540  * If tagging is in force these determine the type of tag to use. Otherwise
 541  * the tag is determined by the underlying type. These values reflect the
 542  * actual octet format.
 543  */
 544
 545 /* Universal tag */
 546 # define ASN1_TFLG_UNIVERSAL     (0x0<<6)
 547 /* Application tag */
 548 # define ASN1_TFLG_APPLICATION   (0x1<<6)
 549 /* Context specific tag */
 550 # define ASN1_TFLG_CONTEXT       (0x2<<6)
 551 /* Private tag */
 552 # define ASN1_TFLG_PRIVATE       (0x3<<6)
 553
 554 # define ASN1_TFLG_TAG_CLASS     (0x3<<6)
 555
 556 /*
 557  * These are for ANY DEFINED BY type. In this case the 'item' field points to
 558  * an ASN1_ADB structure which contains a table of values to decode the
 559  * relevant type
 560  */
 561
 562 # define ASN1_TFLG_ADB_MASK      (0x3<<8)
 563
 564 # define ASN1_TFLG_ADB_OID       (0x1<<8)
 565
 566 # define ASN1_TFLG_ADB_INT       (0x1<<9)
 567
 568 /*
 569  * This flag when present in a SEQUENCE OF, SET OF or EXPLICIT causes
 570  * indefinite length constructed encoding to be used if required.
 571  */
 572
 573 # define ASN1_TFLG_NDEF          (0x1<<11)
 574
 575 /* Field is embedded and not a pointer */
 576 # define ASN1_TFLG_EMBED         (0x1 << 12)
 577
 578 /* This is the actual ASN1 item itself */
 579
 580 struct ASN1_ITEM_st {
 581     char itype;                 /* The item type, primitive, SEQUENCE, CHOICE
 582                                  * or extern */
 583     long utype;                 /* underlying type */
 584     const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains
 585                                      * the contents */
 586     long tcount;                /* Number of templates if SEQUENCE or CHOICE */
 587     const void *funcs;          /* functions that handle this type */
 588     long size;                  /* Structure size (usually) */
 589     const char *sname;          /* Structure name */
 590 };
 591
 592 /*-
 593  * These are values for the itype field and
 594  * determine how the type is interpreted.
 595  *
 596  * For PRIMITIVE types the underlying type
 597  * determines the behaviour if items is NULL.
 598  *
 599  * Otherwise templates must contain a single
 600  * template and the type is treated in the
 601  * same way as the type specified in the template.
 602  *
 603  * For SEQUENCE types the templates field points
 604  * to the members, the size field is the
 605  * structure size.
 606  *
 607  * For CHOICE types the templates field points
 608  * to each possible member (typically a union)
 609  * and the 'size' field is the offset of the
 610  * selector.
 611  *
 612  * The 'funcs' field is used for application
 613  * specific functions.
 614  *
 615  * The EXTERN type uses a new style d2i/i2d.
 616  * The new style should be used where possible
 617  * because it avoids things like the d2i IMPLICIT
 618  * hack.
 619  *
 620  * MSTRING is a multiple string type, it is used
 621  * for a CHOICE of character strings where the
 622  * actual strings all occupy an ASN1_STRING
 623  * structure. In this case the 'utype' field
 624  * has a special meaning, it is used as a mask
 625  * of acceptable types using the B_ASN1 constants.
 626  *
 627  * NDEF_SEQUENCE is the same as SEQUENCE except
 628  * that it will use indefinite length constructed
 629  * encoding if requested.
 630  *
 631  */
 632
 633 # define ASN1_ITYPE_PRIMITIVE            0x0
 634
 635 # define ASN1_ITYPE_SEQUENCE             0x1
 636
 637 # define ASN1_ITYPE_CHOICE               0x2
 638
 639 # define ASN1_ITYPE_EXTERN               0x4
 640
 641 # define ASN1_ITYPE_MSTRING              0x5
 642
 643 # define ASN1_ITYPE_NDEF_SEQUENCE        0x6
 644
 645 /*
 646  * Cache for ASN1 tag and length, so we don't keep re-reading it for things
 647  * like CHOICE
 648  */
 649
 650 struct ASN1_TLC_st {
 651     char valid;                 /* Values below are valid */
 652     int ret;                    /* return value */
 653     long plen;                  /* length */
 654     int ptag;                   /* class value */
 655     int pclass;                 /* class value */
 656     int hdrlen;                 /* header length */
 657 };
 658
 659 /* Typedefs for ASN1 function pointers */
 660 typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
 661                         const ASN1_ITEM *it, int tag, int aclass, char opt,
 662                         ASN1_TLC *ctx);
 663
 664 typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
 665                         const ASN1_ITEM *it, int tag, int aclass);
 666 typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
 667 typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
 668
 669 typedef int ASN1_ex_print_func(BIO *out, ASN1_VALUE **pval,
 670                                int indent, const char *fname,
 671                                const ASN1_PCTX *pctx);
 672
 673 typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont,
 674                                int *putype, const ASN1_ITEM *it);
 675 typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont,
 676                                int len, int utype, char *free_cont,
 677                                const ASN1_ITEM *it);
 678 typedef int ASN1_primitive_print(BIO *out, ASN1_VALUE **pval,
 679                                  const ASN1_ITEM *it, int indent,
 680                                  const ASN1_PCTX *pctx);
 681
 682 typedef struct ASN1_EXTERN_FUNCS_st {
 683     void *app_data;
 684     ASN1_ex_new_func *asn1_ex_new;
 685     ASN1_ex_free_func *asn1_ex_free;
 686     ASN1_ex_free_func *asn1_ex_clear;
 687     ASN1_ex_d2i *asn1_ex_d2i;
 688     ASN1_ex_i2d *asn1_ex_i2d;
 689     ASN1_ex_print_func *asn1_ex_print;
 690 } ASN1_EXTERN_FUNCS;
 691
 692 typedef struct ASN1_PRIMITIVE_FUNCS_st {
 693     void *app_data;
 694     unsigned long flags;
 695     ASN1_ex_new_func *prim_new;
 696     ASN1_ex_free_func *prim_free;
 697     ASN1_ex_free_func *prim_clear;
 698     ASN1_primitive_c2i *prim_c2i;
 699     ASN1_primitive_i2c *prim_i2c;
 700     ASN1_primitive_print *prim_print;
 701 } ASN1_PRIMITIVE_FUNCS;
 702
 703 /*
 704  * This is the ASN1_AUX structure: it handles various miscellaneous
 705  * requirements. For example the use of reference counts and an informational
 706  * callback. The "informational callback" is called at various points during
 707  * the ASN1 encoding and decoding. It can be used to provide minor
 708  * customisation of the structures used. This is most useful where the
 709  * supplied routines *almost* do the right thing but need some extra help at
 710  * a few points. If the callback returns zero then it is assumed a fatal
 711  * error has occurred and the main operation should be abandoned. If major
 712  * changes in the default behaviour are required then an external type is
 713  * more appropriate.
 714  */
 715
 716 typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it,
 717                         void *exarg);
 718
 719 typedef struct ASN1_AUX_st {
 720     void *app_data;
 721     int flags;
 722     int ref_offset;             /* Offset of reference value */
 723     int ref_lock;               /* Lock type to use */
 724     ASN1_aux_cb *asn1_cb;
 725     int enc_offset;             /* Offset of ASN1_ENCODING structure */
 726 } ASN1_AUX;
 727
 728 /* For print related callbacks exarg points to this structure */
 729 typedef struct ASN1_PRINT_ARG_st {
 730     BIO *out;
 731     int indent;
 732     const ASN1_PCTX *pctx;
 733 } ASN1_PRINT_ARG;
 734
 735 /* For streaming related callbacks exarg points to this structure */
 736 typedef struct ASN1_STREAM_ARG_st {
 737     /* BIO to stream through */
 738     BIO *out;
 739     /* BIO with filters appended */
 740     BIO *ndef_bio;
 741     /* Streaming I/O boundary */
 742     unsigned char **boundary;
 743 } ASN1_STREAM_ARG;
 744
 745 /* Flags in ASN1_AUX */
 746
 747 /* Use a reference count */
 748 # define ASN1_AFLG_REFCOUNT      1
 749 /* Save the encoding of structure (useful for signatures) */
 750 # define ASN1_AFLG_ENCODING      2
 751 /* The Sequence length is invalid */
 752 # define ASN1_AFLG_BROKEN        4
 753
 754 /* operation values for asn1_cb */
 755
 756 # define ASN1_OP_NEW_PRE         0
 757 # define ASN1_OP_NEW_POST        1
 758 # define ASN1_OP_FREE_PRE        2
 759 # define ASN1_OP_FREE_POST       3
 760 # define ASN1_OP_D2I_PRE         4
 761 # define ASN1_OP_D2I_POST        5
 762 # define ASN1_OP_I2D_PRE         6
 763 # define ASN1_OP_I2D_POST        7
 764 # define ASN1_OP_PRINT_PRE       8
 765 # define ASN1_OP_PRINT_POST      9
 766 # define ASN1_OP_STREAM_PRE      10
 767 # define ASN1_OP_STREAM_POST     11
 768 # define ASN1_OP_DETACHED_PRE    12
 769 # define ASN1_OP_DETACHED_POST   13
 770
 771 /* Macro to implement a primitive type */
 772 # define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
 773 # define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
 774                                 ASN1_ITEM_start(itname) \
 775                                         ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
 776                                 ASN1_ITEM_end(itname)
 777
 778 /* Macro to implement a multi string type */
 779 # define IMPLEMENT_ASN1_MSTRING(itname, mask) \
 780                                 ASN1_ITEM_start(itname) \
 781                                         ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
 782                                 ASN1_ITEM_end(itname)
 783
 784 # define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
 785         ASN1_ITEM_start(sname) \
 786                 ASN1_ITYPE_EXTERN, \
 787                 tag, \
 788                 NULL, \
 789                 0, \
 790                 &fptrs, \
 791                 0, \
 792                 #sname \
 793         ASN1_ITEM_end(sname)
 794
 795 /* Macro to implement standard functions in terms of ASN1_ITEM structures */
 796
 797 # define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
 798
 799 # define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
 800
 801 # define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
 802                         IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
 803
 804 # define IMPLEMENT_STATIC_ASN1_ALLOC_FUNCTIONS(stname) \
 805                 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(static, stname, stname, stname)
 806
 807 # define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \
 808                 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname)
 809
 810 # define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(pre, stname, itname, fname) \
 811         pre stname *fname##_new(void) \
 812         { \
 813                 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
 814         } \
 815         pre void fname##_free(stname *a) \
 816         { \
 817                 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
 818         }
 819
 820 # define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
 821         stname *fname##_new(void) \
 822         { \
 823                 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
 824         } \
 825         void fname##_free(stname *a) \
 826         { \
 827                 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
 828         }
 829
 830 # define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
 831         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
 832         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
 833
 834 # define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
 835         stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
 836         { \
 837                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
 838         } \
 839         int i2d_##fname(stname *a, unsigned char **out) \
 840         { \
 841                 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
 842         }
 843
 844 # define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \
 845         int i2d_##stname##_NDEF(stname *a, unsigned char **out) \
 846         { \
 847                 return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\
 848         }
 849
 850 # define IMPLEMENT_STATIC_ASN1_ENCODE_FUNCTIONS(stname) \
 851         static stname *d2i_##stname(stname **a, \
 852                                    const unsigned char **in, long len) \
 853         { \
 854                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, \
 855                                                ASN1_ITEM_rptr(stname)); \
 856         } \
 857         static int i2d_##stname(stname *a, unsigned char **out) \
 858         { \
 859                 return ASN1_item_i2d((ASN1_VALUE *)a, out, \
 860                                      ASN1_ITEM_rptr(stname)); \
 861         }
 862
 863 /*
 864  * This includes evil casts to remove const: they will go away when full ASN1
 865  * constification is done.
 866  */
 867 # define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
 868         stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
 869         { \
 870                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
 871         } \
 872         int i2d_##fname(const stname *a, unsigned char **out) \
 873         { \
 874                 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
 875         }
 876
 877 # define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
 878         stname * stname##_dup(stname *x) \
 879         { \
 880         return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
 881         }
 882
 883 # define IMPLEMENT_ASN1_PRINT_FUNCTION(stname) \
 884         IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, stname, stname)
 885
 886 # define IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, itname, fname) \
 887         int fname##_print_ctx(BIO *out, stname *x, int indent, \
 888                                                 const ASN1_PCTX *pctx) \
 889         { \
 890                 return ASN1_item_print(out, (ASN1_VALUE *)x, indent, \
 891                         ASN1_ITEM_rptr(itname), pctx); \
 892         }
 893
 894 # define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
 895                 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
 896
 897 # define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
 898         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
 899         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
 900
 901 /* external definitions for primitive types */
 902
 903 DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
 904 DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
 905 DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
 906 DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
 907 DECLARE_ASN1_ITEM(CBIGNUM)
 908 DECLARE_ASN1_ITEM(BIGNUM)
 909 DECLARE_ASN1_ITEM(INT32)
 910 DECLARE_ASN1_ITEM(ZINT32)
 911 DECLARE_ASN1_ITEM(UINT32)
 912 DECLARE_ASN1_ITEM(ZUINT32)
 913 DECLARE_ASN1_ITEM(INT64)
 914 DECLARE_ASN1_ITEM(ZINT64)
 915 DECLARE_ASN1_ITEM(UINT64)
 916 DECLARE_ASN1_ITEM(ZUINT64)
 917
 918 # if OPENSSL_API_COMPAT < 0x10200000L
 919 /*
 920  * LONG and ZLONG are strongly discouraged for use as stored data, as the
 921  * underlying C type (long) differs in size depending on the architecture.
 922  * They are designed with 32-bit longs in mind.
 923  */
 924 DECLARE_ASN1_ITEM(LONG)
 925 DECLARE_ASN1_ITEM(ZLONG)
 926 # endif
 927
 928 DEFINE_STACK_OF(ASN1_VALUE)
 929
 930 /* Functions used internally by the ASN1 code */
 931
 932 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
 933 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 934
 935 int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
 936                      const ASN1_ITEM *it, int tag, int aclass, char opt,
 937                      ASN1_TLC *ctx);
 938
 939 int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
 940                      const ASN1_ITEM *it, int tag, int aclass);
 941
 942 #ifdef  __cplusplus
 943 }
 944 #endif
 945 #endif