mingw/include/openssl/asn1t.h

   1 /* asn1t.h */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000 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
  77 #ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
  78
  79 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
  80 #define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr))
  81
  82
  83 /* Macros for start and end of ASN1_ITEM definition */
  84
  85 #define ASN1_ITEM_start(itname) \
  86         OPENSSL_GLOBAL const ASN1_ITEM itname##_it = {
  87
  88 #define ASN1_ITEM_end(itname) \
  89                 };
  90
  91 #else
  92
  93 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
  94 #define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr()))
  95
  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 ASN1_ITEM_end(itname) \
 105                 }; \
 106         return &local_it; \
 107         }
 108
 109 #endif
 110
 111
 112 /* Macros to aid ASN1 template writing */
 113
 114 #define ASN1_ITEM_TEMPLATE(tname) \
 115         static const ASN1_TEMPLATE tname##_item_tt
 116
 117 #define ASN1_ITEM_TEMPLATE_END(tname) \
 118         ;\
 119         ASN1_ITEM_start(tname) \
 120                 ASN1_ITYPE_PRIMITIVE,\
 121                 -1,\
 122                 &tname##_item_tt,\
 123                 0,\
 124                 NULL,\
 125                 0,\
 126                 #tname \
 127         ASN1_ITEM_end(tname)
 128
 129
 130 /* This is a ASN1 type which just embeds a template */
 131
 132 /* This pair helps declare a SEQUENCE. We can do:
 133  *
 134  *      ASN1_SEQUENCE(stname) = {
 135  *              ... SEQUENCE components ...
 136  *      } ASN1_SEQUENCE_END(stname)
 137  *
 138  *      This will produce an ASN1_ITEM called stname_it
 139  *      for a structure called stname.
 140  *
 141  *      If you want the same structure but a different
 142  *      name then use:
 143  *
 144  *      ASN1_SEQUENCE(itname) = {
 145  *              ... SEQUENCE components ...
 146  *      } ASN1_SEQUENCE_END_name(stname, itname)
 147  *
 148  *      This will create an item called itname_it using
 149  *      a structure called stname.
 150  */
 151
 152 #define ASN1_SEQUENCE(tname) \
 153         static const ASN1_TEMPLATE tname##_seq_tt[]
 154
 155 #define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)
 156
 157 #define ASN1_SEQUENCE_END_name(stname, tname) \
 158         ;\
 159         ASN1_ITEM_start(tname) \
 160                 ASN1_ITYPE_SEQUENCE,\
 161                 V_ASN1_SEQUENCE,\
 162                 tname##_seq_tt,\
 163                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 164                 NULL,\
 165                 sizeof(stname),\
 166                 #stname \
 167         ASN1_ITEM_end(tname)
 168
 169 #define ASN1_NDEF_SEQUENCE(tname) \
 170         ASN1_SEQUENCE(tname)
 171
 172 #define ASN1_NDEF_SEQUENCE_cb(tname, cb) \
 173         ASN1_SEQUENCE_cb(tname, cb)
 174
 175 #define ASN1_SEQUENCE_cb(tname, cb) \
 176         static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
 177         ASN1_SEQUENCE(tname)
 178
 179 #define ASN1_BROKEN_SEQUENCE(tname) \
 180         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \
 181         ASN1_SEQUENCE(tname)
 182
 183 #define ASN1_SEQUENCE_ref(tname, cb, lck) \
 184         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), lck, cb, 0}; \
 185         ASN1_SEQUENCE(tname)
 186
 187 #define ASN1_SEQUENCE_enc(tname, enc, cb) \
 188         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
 189         ASN1_SEQUENCE(tname)
 190
 191 #define ASN1_NDEF_SEQUENCE_END(tname) \
 192         ;\
 193         ASN1_ITEM_start(tname) \
 194                 ASN1_ITYPE_NDEF_SEQUENCE,\
 195                 V_ASN1_SEQUENCE,\
 196                 tname##_seq_tt,\
 197                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 198                 NULL,\
 199                 sizeof(tname),\
 200                 #tname \
 201         ASN1_ITEM_end(tname)
 202
 203 #define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
 204
 205 #define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
 206
 207 #define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
 208
 209 #define ASN1_SEQUENCE_END_ref(stname, tname) \
 210         ;\
 211         ASN1_ITEM_start(tname) \
 212                 ASN1_ITYPE_SEQUENCE,\
 213                 V_ASN1_SEQUENCE,\
 214                 tname##_seq_tt,\
 215                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 216                 &tname##_aux,\
 217                 sizeof(stname),\
 218                 #stname \
 219         ASN1_ITEM_end(tname)
 220
 221
 222 /* This pair helps declare a CHOICE type. We can do:
 223  *
 224  *      ASN1_CHOICE(chname) = {
 225  *              ... CHOICE options ...
 226  *      ASN1_CHOICE_END(chname)
 227  *
 228  *      This will produce an ASN1_ITEM called chname_it
 229  *      for a structure called chname. The structure
 230  *      definition must look like this:
 231  *      typedef struct {
 232  *              int type;
 233  *              union {
 234  *                      ASN1_SOMETHING *opt1;
 235  *                      ASN1_SOMEOTHER *opt2;
 236  *              } value;
 237  *      } chname;
 238  *
 239  *      the name of the selector must be 'type'.
 240  *      to use an alternative selector name use the
 241  *      ASN1_CHOICE_END_selector() version.
 242  */
 243
 244 #define ASN1_CHOICE(tname) \
 245         static const ASN1_TEMPLATE tname##_ch_tt[]
 246
 247 #define ASN1_CHOICE_cb(tname, cb) \
 248         static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
 249         ASN1_CHOICE(tname)
 250
 251 #define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
 252
 253 #define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
 254
 255 #define ASN1_CHOICE_END_selector(stname, tname, selname) \
 256         ;\
 257         ASN1_ITEM_start(tname) \
 258                 ASN1_ITYPE_CHOICE,\
 259                 offsetof(stname,selname) ,\
 260                 tname##_ch_tt,\
 261                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 262                 NULL,\
 263                 sizeof(stname),\
 264                 #stname \
 265         ASN1_ITEM_end(tname)
 266
 267 #define ASN1_CHOICE_END_cb(stname, tname, selname) \
 268         ;\
 269         ASN1_ITEM_start(tname) \
 270                 ASN1_ITYPE_CHOICE,\
 271                 offsetof(stname,selname) ,\
 272                 tname##_ch_tt,\
 273                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 274                 &tname##_aux,\
 275                 sizeof(stname),\
 276                 #stname \
 277         ASN1_ITEM_end(tname)
 278
 279 /* This helps with the template wrapper form of ASN1_ITEM */
 280
 281 #define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
 282         (flags), (tag), 0,\
 283         #name, ASN1_ITEM_ref(type) }
 284
 285 /* These help with SEQUENCE or CHOICE components */
 286
 287 /* used to declare other types */
 288
 289 #define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
 290         (flags), (tag), offsetof(stname, field),\
 291         #field, ASN1_ITEM_ref(type) }
 292
 293 /* used when the structure is combined with the parent */
 294
 295 #define ASN1_EX_COMBINE(flags, tag, type) { \
 296         (flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) }
 297
 298 /* implicit and explicit helper macros */
 299
 300 #define ASN1_IMP_EX(stname, field, type, tag, ex) \
 301                 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
 302
 303 #define ASN1_EXP_EX(stname, field, type, tag, ex) \
 304                 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
 305
 306 /* Any defined by macros: the field used is in the table itself */
 307
 308 #ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
 309 #define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
 310 #define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
 311 #else
 312 #define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, tblname##_adb }
 313 #define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, tblname##_adb }
 314 #endif
 315 /* Plain simple type */
 316 #define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
 317
 318 /* OPTIONAL simple type */
 319 #define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 320
 321 /* IMPLICIT tagged simple type */
 322 #define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
 323
 324 /* IMPLICIT tagged OPTIONAL simple type */
 325 #define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
 326
 327 /* Same as above but EXPLICIT */
 328
 329 #define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
 330 #define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
 331
 332 /* SEQUENCE OF type */
 333 #define ASN1_SEQUENCE_OF(stname, field, type) \
 334                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
 335
 336 /* OPTIONAL SEQUENCE OF */
 337 #define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
 338                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 339
 340 /* Same as above but for SET OF */
 341
 342 #define ASN1_SET_OF(stname, field, type) \
 343                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
 344
 345 #define ASN1_SET_OF_OPT(stname, field, type) \
 346                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 347
 348 /* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
 349
 350 #define ASN1_IMP_SET_OF(stname, field, type, tag) \
 351                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
 352
 353 #define ASN1_EXP_SET_OF(stname, field, type, tag) \
 354                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
 355
 356 #define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
 357                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
 358
 359 #define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
 360                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
 361
 362 #define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
 363                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
 364
 365 #define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
 366                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 367
 368 #define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
 369                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
 370
 371 #define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
 372                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 373
 374 /* EXPLICIT using indefinite length constructed form */
 375 #define ASN1_NDEF_EXP(stname, field, type, tag) \
 376                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF)
 377
 378 /* EXPLICIT OPTIONAL using indefinite length constructed form */
 379 #define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \
 380                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF)
 381
 382 /* Macros for the ASN1_ADB structure */
 383
 384 #define ASN1_ADB(name) \
 385         static const ASN1_ADB_TABLE name##_adbtbl[]
 386
 387 #ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
 388
 389 #define ASN1_ADB_END(name, flags, field, app_table, def, none) \
 390         ;\
 391         static const ASN1_ADB name##_adb = {\
 392                 flags,\
 393                 offsetof(name, field),\
 394                 app_table,\
 395                 name##_adbtbl,\
 396                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
 397                 def,\
 398                 none\
 399         }
 400
 401 #else
 402
 403 #define ASN1_ADB_END(name, flags, field, app_table, def, none) \
 404         ;\
 405         static const ASN1_ITEM *name##_adb(void) \
 406         { \
 407         static const ASN1_ADB internal_adb = \
 408                 {\
 409                 flags,\
 410                 offsetof(name, field),\
 411                 app_table,\
 412                 name##_adbtbl,\
 413                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
 414                 def,\
 415                 none\
 416                 }; \
 417                 return (const ASN1_ITEM *) &internal_adb; \
 418         } \
 419         void dummy_function(void)
 420
 421 #endif
 422
 423 #define ADB_ENTRY(val, template) {val, template}
 424
 425 #define ASN1_ADB_TEMPLATE(name) \
 426         static const ASN1_TEMPLATE name##_tt
 427
 428 /* This is the ASN1 template structure that defines
 429  * a wrapper round the actual type. It determines the
 430  * actual position of the field in the value structure,
 431  * various flags such as OPTIONAL and the field name.
 432  */
 433
 434 struct ASN1_TEMPLATE_st {
 435 unsigned long flags;            /* Various flags */
 436 long tag;                       /* tag, not used if no tagging */
 437 unsigned long offset;           /* Offset of this field in structure */
 438 #ifndef NO_ASN1_FIELD_NAMES
 439 const char *field_name;         /* Field name */
 440 #endif
 441 ASN1_ITEM_EXP *item;            /* Relevant ASN1_ITEM or ASN1_ADB */
 442 };
 443
 444 /* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
 445
 446 #define ASN1_TEMPLATE_item(t) (t->item_ptr)
 447 #define ASN1_TEMPLATE_adb(t) (t->item_ptr)
 448
 449 typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
 450 typedef struct ASN1_ADB_st ASN1_ADB;
 451
 452 struct ASN1_ADB_st {
 453         unsigned long flags;    /* Various flags */
 454         unsigned long offset;   /* Offset of selector field */
 455         STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
 456         const ASN1_ADB_TABLE *tbl;      /* Table of possible types */
 457         long tblcount;          /* Number of entries in tbl */
 458         const ASN1_TEMPLATE *default_tt;  /* Type to use if no match */
 459         const ASN1_TEMPLATE *null_tt;  /* Type to use if selector is NULL */
 460 };
 461
 462 struct ASN1_ADB_TABLE_st {
 463         long value;             /* NID for an object or value for an int */
 464         const ASN1_TEMPLATE tt;         /* item for this value */
 465 };
 466
 467 /* template flags */
 468
 469 /* Field is optional */
 470 #define ASN1_TFLG_OPTIONAL      (0x1)
 471
 472 /* Field is a SET OF */
 473 #define ASN1_TFLG_SET_OF        (0x1 << 1)
 474
 475 /* Field is a SEQUENCE OF */
 476 #define ASN1_TFLG_SEQUENCE_OF   (0x2 << 1)
 477
 478 /* Special case: this refers to a SET OF that
 479  * will be sorted into DER order when encoded *and*
 480  * the corresponding STACK will be modified to match
 481  * the new order.
 482  */
 483 #define ASN1_TFLG_SET_ORDER     (0x3 << 1)
 484
 485 /* Mask for SET OF or SEQUENCE OF */
 486 #define ASN1_TFLG_SK_MASK       (0x3 << 1)
 487
 488 /* These flags mean the tag should be taken from the
 489  * tag field. If EXPLICIT then the underlying type
 490  * is used for the inner tag.
 491  */
 492
 493 /* IMPLICIT tagging */
 494 #define ASN1_TFLG_IMPTAG        (0x1 << 3)
 495
 496
 497 /* EXPLICIT tagging, inner tag from underlying type */
 498 #define ASN1_TFLG_EXPTAG        (0x2 << 3)
 499
 500 #define ASN1_TFLG_TAG_MASK      (0x3 << 3)
 501
 502 /* context specific IMPLICIT */
 503 #define ASN1_TFLG_IMPLICIT      ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
 504
 505 /* context specific EXPLICIT */
 506 #define ASN1_TFLG_EXPLICIT      ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
 507
 508 /* If tagging is in force these determine the
 509  * type of tag to use. Otherwise the tag is
 510  * determined by the underlying type. These
 511  * values reflect the actual octet format.
 512  */
 513
 514 /* Universal tag */
 515 #define ASN1_TFLG_UNIVERSAL     (0x0<<6)
 516 /* Application tag */
 517 #define ASN1_TFLG_APPLICATION   (0x1<<6)
 518 /* Context specific tag */
 519 #define ASN1_TFLG_CONTEXT       (0x2<<6)
 520 /* Private tag */
 521 #define ASN1_TFLG_PRIVATE       (0x3<<6)
 522
 523 #define ASN1_TFLG_TAG_CLASS     (0x3<<6)
 524
 525 /* These are for ANY DEFINED BY type. In this case
 526  * the 'item' field points to an ASN1_ADB structure
 527  * which contains a table of values to decode the
 528  * relevant type
 529  */
 530
 531 #define ASN1_TFLG_ADB_MASK      (0x3<<8)
 532
 533 #define ASN1_TFLG_ADB_OID       (0x1<<8)
 534
 535 #define ASN1_TFLG_ADB_INT       (0x1<<9)
 536
 537 /* This flag means a parent structure is passed
 538  * instead of the field: this is useful is a
 539  * SEQUENCE is being combined with a CHOICE for
 540  * example. Since this means the structure and
 541  * item name will differ we need to use the
 542  * ASN1_CHOICE_END_name() macro for example.
 543  */
 544
 545 #define ASN1_TFLG_COMBINE       (0x1<<10)
 546
 547 /* This flag when present in a SEQUENCE OF, SET OF
 548  * or EXPLICIT causes indefinite length constructed
 549  * encoding to be used if required.
 550  */
 551
 552 #define ASN1_TFLG_NDEF          (0x1<<11)
 553
 554 /* This is the actual ASN1 item itself */
 555
 556 struct ASN1_ITEM_st {
 557 char itype;                     /* The item type, primitive, SEQUENCE, CHOICE or extern */
 558 long utype;                     /* underlying type */
 559 const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains the contents */
 560 long tcount;                    /* Number of templates if SEQUENCE or CHOICE */
 561 const void *funcs;              /* functions that handle this type */
 562 long size;                      /* Structure size (usually)*/
 563 #ifndef NO_ASN1_FIELD_NAMES
 564 const char *sname;              /* Structure name */
 565 #endif
 566 };
 567
 568 /* These are values for the itype field and
 569  * determine how the type is interpreted.
 570  *
 571  * For PRIMITIVE types the underlying type
 572  * determines the behaviour if items is NULL.
 573  *
 574  * Otherwise templates must contain a single
 575  * template and the type is treated in the
 576  * same way as the type specified in the template.
 577  *
 578  * For SEQUENCE types the templates field points
 579  * to the members, the size field is the
 580  * structure size.
 581  *
 582  * For CHOICE types the templates field points
 583  * to each possible member (typically a union)
 584  * and the 'size' field is the offset of the
 585  * selector.
 586  *
 587  * The 'funcs' field is used for application
 588  * specific functions.
 589  *
 590  * For COMPAT types the funcs field gives a
 591  * set of functions that handle this type, this
 592  * supports the old d2i, i2d convention.
 593  *
 594  * The EXTERN type uses a new style d2i/i2d.
 595  * The new style should be used where possible
 596  * because it avoids things like the d2i IMPLICIT
 597  * hack.
 598  *
 599  * MSTRING is a multiple string type, it is used
 600  * for a CHOICE of character strings where the
 601  * actual strings all occupy an ASN1_STRING
 602  * structure. In this case the 'utype' field
 603  * has a special meaning, it is used as a mask
 604  * of acceptable types using the B_ASN1 constants.
 605  *
 606  * NDEF_SEQUENCE is the same as SEQUENCE except
 607  * that it will use indefinite length constructed
 608  * encoding if requested.
 609  *
 610  */
 611
 612 #define ASN1_ITYPE_PRIMITIVE            0x0
 613
 614 #define ASN1_ITYPE_SEQUENCE             0x1
 615
 616 #define ASN1_ITYPE_CHOICE               0x2
 617
 618 #define ASN1_ITYPE_COMPAT               0x3
 619
 620 #define ASN1_ITYPE_EXTERN               0x4
 621
 622 #define ASN1_ITYPE_MSTRING              0x5
 623
 624 #define ASN1_ITYPE_NDEF_SEQUENCE        0x6
 625
 626 /* Cache for ASN1 tag and length, so we
 627  * don't keep re-reading it for things
 628  * like CHOICE
 629  */
 630
 631 struct ASN1_TLC_st{
 632         char valid;     /* Values below are valid */
 633         int ret;        /* return value */
 634         long plen;      /* length */
 635         int ptag;       /* class value */
 636         int pclass;     /* class value */
 637         int hdrlen;     /* header length */
 638 };
 639
 640 /* Typedefs for ASN1 function pointers */
 641
 642 typedef ASN1_VALUE * ASN1_new_func(void);
 643 typedef void ASN1_free_func(ASN1_VALUE *a);
 644 typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, const unsigned char ** in, long length);
 645 typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in);
 646
 647 typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
 648                                         int tag, int aclass, char opt, ASN1_TLC *ctx);
 649
 650 typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
 651 typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
 652 typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
 653
 654 typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
 655 typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
 656
 657 typedef struct ASN1_COMPAT_FUNCS_st {
 658         ASN1_new_func *asn1_new;
 659         ASN1_free_func *asn1_free;
 660         ASN1_d2i_func *asn1_d2i;
 661         ASN1_i2d_func *asn1_i2d;
 662 } ASN1_COMPAT_FUNCS;
 663
 664 typedef struct ASN1_EXTERN_FUNCS_st {
 665         void *app_data;
 666         ASN1_ex_new_func *asn1_ex_new;
 667         ASN1_ex_free_func *asn1_ex_free;
 668         ASN1_ex_free_func *asn1_ex_clear;
 669         ASN1_ex_d2i *asn1_ex_d2i;
 670         ASN1_ex_i2d *asn1_ex_i2d;
 671 } ASN1_EXTERN_FUNCS;
 672
 673 typedef struct ASN1_PRIMITIVE_FUNCS_st {
 674         void *app_data;
 675         unsigned long flags;
 676         ASN1_ex_new_func *prim_new;
 677         ASN1_ex_free_func *prim_free;
 678         ASN1_ex_free_func *prim_clear;
 679         ASN1_primitive_c2i *prim_c2i;
 680         ASN1_primitive_i2c *prim_i2c;
 681 } ASN1_PRIMITIVE_FUNCS;
 682
 683 /* This is the ASN1_AUX structure: it handles various
 684  * miscellaneous requirements. For example the use of
 685  * reference counts and an informational callback.
 686  *
 687  * The "informational callback" is called at various
 688  * points during the ASN1 encoding and decoding. It can
 689  * be used to provide minor customisation of the structures
 690  * used. This is most useful where the supplied routines
 691  * *almost* do the right thing but need some extra help
 692  * at a few points. If the callback returns zero then
 693  * it is assumed a fatal error has occurred and the
 694  * main operation should be abandoned.
 695  *
 696  * If major changes in the default behaviour are required
 697  * then an external type is more appropriate.
 698  */
 699
 700 typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it);
 701
 702 typedef struct ASN1_AUX_st {
 703         void *app_data;
 704         int flags;
 705         int ref_offset;         /* Offset of reference value */
 706         int ref_lock;           /* Lock type to use */
 707         ASN1_aux_cb *asn1_cb;
 708         int enc_offset;         /* Offset of ASN1_ENCODING structure */
 709 } ASN1_AUX;
 710
 711 /* Flags in ASN1_AUX */
 712
 713 /* Use a reference count */
 714 #define ASN1_AFLG_REFCOUNT      1
 715 /* Save the encoding of structure (useful for signatures) */
 716 #define ASN1_AFLG_ENCODING      2
 717 /* The Sequence length is invalid */
 718 #define ASN1_AFLG_BROKEN        4
 719
 720 /* operation values for asn1_cb */
 721
 722 #define ASN1_OP_NEW_PRE         0
 723 #define ASN1_OP_NEW_POST        1
 724 #define ASN1_OP_FREE_PRE        2
 725 #define ASN1_OP_FREE_POST       3
 726 #define ASN1_OP_D2I_PRE         4
 727 #define ASN1_OP_D2I_POST        5
 728 #define ASN1_OP_I2D_PRE         6
 729 #define ASN1_OP_I2D_POST        7
 730
 731 /* Macro to implement a primitive type */
 732 #define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
 733 #define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
 734                                 ASN1_ITEM_start(itname) \
 735                                         ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
 736                                 ASN1_ITEM_end(itname)
 737
 738 /* Macro to implement a multi string type */
 739 #define IMPLEMENT_ASN1_MSTRING(itname, mask) \
 740                                 ASN1_ITEM_start(itname) \
 741                                         ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
 742                                 ASN1_ITEM_end(itname)
 743
 744 /* Macro to implement an ASN1_ITEM in terms of old style funcs */
 745
 746 #define IMPLEMENT_COMPAT_ASN1(sname) IMPLEMENT_COMPAT_ASN1_type(sname, V_ASN1_SEQUENCE)
 747
 748 #define IMPLEMENT_COMPAT_ASN1_type(sname, tag) \
 749         static const ASN1_COMPAT_FUNCS sname##_ff = { \
 750                 (ASN1_new_func *)sname##_new, \
 751                 (ASN1_free_func *)sname##_free, \
 752                 (ASN1_d2i_func *)d2i_##sname, \
 753                 (ASN1_i2d_func *)i2d_##sname, \
 754         }; \
 755         ASN1_ITEM_start(sname) \
 756                 ASN1_ITYPE_COMPAT, \
 757                 tag, \
 758                 NULL, \
 759                 0, \
 760                 &sname##_ff, \
 761                 0, \
 762                 #sname \
 763         ASN1_ITEM_end(sname)
 764
 765 #define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
 766         ASN1_ITEM_start(sname) \
 767                 ASN1_ITYPE_EXTERN, \
 768                 tag, \
 769                 NULL, \
 770                 0, \
 771                 &fptrs, \
 772                 0, \
 773                 #sname \
 774         ASN1_ITEM_end(sname)
 775
 776 /* Macro to implement standard functions in terms of ASN1_ITEM structures */
 777
 778 #define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
 779
 780 #define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
 781
 782 #define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
 783                         IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
 784
 785 #define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \
 786                 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname)
 787
 788 #define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
 789         stname *fname##_new(void) \
 790         { \
 791                 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
 792         } \
 793         void fname##_free(stname *a) \
 794         { \
 795                 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
 796         }
 797
 798 #define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
 799         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
 800         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
 801
 802 #define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
 803         stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
 804         { \
 805                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
 806         } \
 807         int i2d_##fname(stname *a, unsigned char **out) \
 808         { \
 809                 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
 810         }
 811
 812 #define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \
 813         int i2d_##stname##_NDEF(stname *a, unsigned char **out) \
 814         { \
 815                 return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\
 816         }
 817
 818 /* This includes evil casts to remove const: they will go away when full
 819  * ASN1 constification is done.
 820  */
 821 #define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
 822         stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
 823         { \
 824                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
 825         } \
 826         int i2d_##fname(const stname *a, unsigned char **out) \
 827         { \
 828                 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
 829         }
 830
 831 #define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
 832         stname * stname##_dup(stname *x) \
 833         { \
 834         return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
 835         }
 836
 837 #define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
 838                 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
 839
 840 #define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
 841         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
 842         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
 843
 844 /* external definitions for primitive types */
 845
 846 DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
 847 DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
 848 DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
 849 DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
 850 DECLARE_ASN1_ITEM(CBIGNUM)
 851 DECLARE_ASN1_ITEM(BIGNUM)
 852 DECLARE_ASN1_ITEM(LONG)
 853 DECLARE_ASN1_ITEM(ZLONG)
 854
 855 DECLARE_STACK_OF(ASN1_VALUE)
 856
 857 /* Functions used internally by the ASN1 code */
 858
 859 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
 860 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 861 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
 862 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
 863
 864 void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
 865 int ASN1_template_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_TEMPLATE *tt);
 866 int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
 867                                 int tag, int aclass, char opt, ASN1_TLC *ctx);
 868
 869 int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
 870 int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt);
 871 void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 872
 873 int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
 874 int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
 875
 876 int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it);
 877 int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it);
 878
 879 ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
 880
 881 const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr);
 882
 883 int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it);
 884
 885 void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it);
 886 void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 887 int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it);
 888 int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, const ASN1_ITEM *it);
 889
 890 #ifdef  __cplusplus
 891 }
 892 #endif
 893 #endif