crypto/openssl-0.9.7e/include/openssl/asn1t.h

   1 /* asn1t.h */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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         const static 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         const static 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_SEQUENCE_cb(tname, cb) \
 170         const static ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
 171         ASN1_SEQUENCE(tname)
 172
 173 #define ASN1_BROKEN_SEQUENCE(tname) \
 174         const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \
 175         ASN1_SEQUENCE(tname)
 176
 177 #define ASN1_SEQUENCE_ref(tname, cb, lck) \
 178         const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), lck, cb, 0}; \
 179         ASN1_SEQUENCE(tname)
 180
 181 #define ASN1_SEQUENCE_enc(tname, enc, cb) \
 182         const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
 183         ASN1_SEQUENCE(tname)
 184
 185 #define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
 186
 187 #define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
 188
 189 #define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
 190
 191 #define ASN1_SEQUENCE_END_ref(stname, tname) \
 192         ;\
 193         ASN1_ITEM_start(tname) \
 194                 ASN1_ITYPE_SEQUENCE,\
 195                 V_ASN1_SEQUENCE,\
 196                 tname##_seq_tt,\
 197                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 198                 &tname##_aux,\
 199                 sizeof(stname),\
 200                 #stname \
 201         ASN1_ITEM_end(tname)
 202
 203
 204 /* This pair helps declare a CHOICE type. We can do:
 205  *
 206  *      ASN1_CHOICE(chname) = {
 207  *              ... CHOICE options ...
 208  *      ASN1_CHOICE_END(chname)
 209  *
 210  *      This will produce an ASN1_ITEM called chname_it
 211  *      for a structure called chname. The structure
 212  *      definition must look like this:
 213  *      typedef struct {
 214  *              int type;
 215  *              union {
 216  *                      ASN1_SOMETHING *opt1;
 217  *                      ASN1_SOMEOTHER *opt2;
 218  *              } value;
 219  *      } chname;
 220  *
 221  *      the name of the selector must be 'type'.
 222  *      to use an alternative selector name use the
 223  *      ASN1_CHOICE_END_selector() version.
 224  */
 225
 226 #define ASN1_CHOICE(tname) \
 227         const static ASN1_TEMPLATE tname##_ch_tt[]
 228
 229 #define ASN1_CHOICE_cb(tname, cb) \
 230         const static ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
 231         ASN1_CHOICE(tname)
 232
 233 #define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
 234
 235 #define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
 236
 237 #define ASN1_CHOICE_END_selector(stname, tname, selname) \
 238         ;\
 239         ASN1_ITEM_start(tname) \
 240                 ASN1_ITYPE_CHOICE,\
 241                 offsetof(stname,selname) ,\
 242                 tname##_ch_tt,\
 243                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 244                 NULL,\
 245                 sizeof(stname),\
 246                 #stname \
 247         ASN1_ITEM_end(tname)
 248
 249 #define ASN1_CHOICE_END_cb(stname, tname, selname) \
 250         ;\
 251         ASN1_ITEM_start(tname) \
 252                 ASN1_ITYPE_CHOICE,\
 253                 offsetof(stname,selname) ,\
 254                 tname##_ch_tt,\
 255                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 256                 &tname##_aux,\
 257                 sizeof(stname),\
 258                 #stname \
 259         ASN1_ITEM_end(tname)
 260
 261 /* This helps with the template wrapper form of ASN1_ITEM */
 262
 263 #define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
 264         (flags), (tag), 0,\
 265         #name, ASN1_ITEM_ref(type) }
 266
 267 /* These help with SEQUENCE or CHOICE components */
 268
 269 /* used to declare other types */
 270
 271 #define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
 272         (flags), (tag), offsetof(stname, field),\
 273         #field, ASN1_ITEM_ref(type) }
 274
 275 /* used when the structure is combined with the parent */
 276
 277 #define ASN1_EX_COMBINE(flags, tag, type) { \
 278         (flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) }
 279
 280 /* implicit and explicit helper macros */
 281
 282 #define ASN1_IMP_EX(stname, field, type, tag, ex) \
 283                 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
 284
 285 #define ASN1_EXP_EX(stname, field, type, tag, ex) \
 286                 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
 287
 288 /* Any defined by macros: the field used is in the table itself */
 289
 290 #ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
 291 #define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
 292 #define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
 293 #else
 294 #define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, tblname##_adb }
 295 #define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, tblname##_adb }
 296 #endif
 297 /* Plain simple type */
 298 #define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
 299
 300 /* OPTIONAL simple type */
 301 #define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 302
 303 /* IMPLICIT tagged simple type */
 304 #define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
 305
 306 /* IMPLICIT tagged OPTIONAL simple type */
 307 #define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
 308
 309 /* Same as above but EXPLICIT */
 310
 311 #define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
 312 #define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
 313
 314 /* SEQUENCE OF type */
 315 #define ASN1_SEQUENCE_OF(stname, field, type) \
 316                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
 317
 318 /* OPTIONAL SEQUENCE OF */
 319 #define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
 320                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 321
 322 /* Same as above but for SET OF */
 323
 324 #define ASN1_SET_OF(stname, field, type) \
 325                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
 326
 327 #define ASN1_SET_OF_OPT(stname, field, type) \
 328                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 329
 330 /* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
 331
 332 #define ASN1_IMP_SET_OF(stname, field, type, tag) \
 333                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
 334
 335 #define ASN1_EXP_SET_OF(stname, field, type, tag) \
 336                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
 337
 338 #define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
 339                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
 340
 341 #define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
 342                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
 343
 344 #define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
 345                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
 346
 347 #define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
 348                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 349
 350 #define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
 351                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
 352
 353 #define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
 354                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 355
 356 /* Macros for the ASN1_ADB structure */
 357
 358 #define ASN1_ADB(name) \
 359         const static ASN1_ADB_TABLE name##_adbtbl[]
 360
 361 #ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
 362
 363 #define ASN1_ADB_END(name, flags, field, app_table, def, none) \
 364         ;\
 365         const static ASN1_ADB name##_adb = {\
 366                 flags,\
 367                 offsetof(name, field),\
 368                 app_table,\
 369                 name##_adbtbl,\
 370                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
 371                 def,\
 372                 none\
 373         }
 374
 375 #else
 376
 377 #define ASN1_ADB_END(name, flags, field, app_table, def, none) \
 378         ;\
 379         const static ASN1_ITEM *name##_adb(void) \
 380         { \
 381         const static ASN1_ADB internal_adb = \
 382                 {\
 383                 flags,\
 384                 offsetof(name, field),\
 385                 app_table,\
 386                 name##_adbtbl,\
 387                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
 388                 def,\
 389                 none\
 390                 }; \
 391                 return (const ASN1_ITEM *) &internal_adb; \
 392         } \
 393         void dummy_function(void)
 394
 395 #endif
 396
 397 #define ADB_ENTRY(val, template) {val, template}
 398
 399 #define ASN1_ADB_TEMPLATE(name) \
 400         const static ASN1_TEMPLATE name##_tt
 401
 402 /* This is the ASN1 template structure that defines
 403  * a wrapper round the actual type. It determines the
 404  * actual position of the field in the value structure,
 405  * various flags such as OPTIONAL and the field name.
 406  */
 407
 408 struct ASN1_TEMPLATE_st {
 409 unsigned long flags;            /* Various flags */
 410 long tag;                       /* tag, not used if no tagging */
 411 unsigned long offset;           /* Offset of this field in structure */
 412 #ifndef NO_ASN1_FIELD_NAMES
 413 char *field_name;               /* Field name */
 414 #endif
 415 ASN1_ITEM_EXP *item;            /* Relevant ASN1_ITEM or ASN1_ADB */
 416 };
 417
 418 /* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
 419
 420 #define ASN1_TEMPLATE_item(t) (t->item_ptr)
 421 #define ASN1_TEMPLATE_adb(t) (t->item_ptr)
 422
 423 typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
 424 typedef struct ASN1_ADB_st ASN1_ADB;
 425
 426 struct ASN1_ADB_st {
 427         unsigned long flags;    /* Various flags */
 428         unsigned long offset;   /* Offset of selector field */
 429         STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
 430         const ASN1_ADB_TABLE *tbl;      /* Table of possible types */
 431         long tblcount;          /* Number of entries in tbl */
 432         const ASN1_TEMPLATE *default_tt;  /* Type to use if no match */
 433         const ASN1_TEMPLATE *null_tt;  /* Type to use if selector is NULL */
 434 };
 435
 436 struct ASN1_ADB_TABLE_st {
 437         long value;             /* NID for an object or value for an int */
 438         const ASN1_TEMPLATE tt;         /* item for this value */
 439 };
 440
 441 /* template flags */
 442
 443 /* Field is optional */
 444 #define ASN1_TFLG_OPTIONAL      (0x1)
 445
 446 /* Field is a SET OF */
 447 #define ASN1_TFLG_SET_OF        (0x1 << 1)
 448
 449 /* Field is a SEQUENCE OF */
 450 #define ASN1_TFLG_SEQUENCE_OF   (0x2 << 1)
 451
 452 /* Special case: this refers to a SET OF that
 453  * will be sorted into DER order when encoded *and*
 454  * the corresponding STACK will be modified to match
 455  * the new order.
 456  */
 457 #define ASN1_TFLG_SET_ORDER     (0x3 << 1)
 458
 459 /* Mask for SET OF or SEQUENCE OF */
 460 #define ASN1_TFLG_SK_MASK       (0x3 << 1)
 461
 462 /* These flags mean the tag should be taken from the
 463  * tag field. If EXPLICIT then the underlying type
 464  * is used for the inner tag.
 465  */
 466
 467 /* IMPLICIT tagging */
 468 #define ASN1_TFLG_IMPTAG        (0x1 << 3)
 469
 470
 471 /* EXPLICIT tagging, inner tag from underlying type */
 472 #define ASN1_TFLG_EXPTAG        (0x2 << 3)
 473
 474 #define ASN1_TFLG_TAG_MASK      (0x3 << 3)
 475
 476 /* context specific IMPLICIT */
 477 #define ASN1_TFLG_IMPLICIT      ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
 478
 479 /* context specific EXPLICIT */
 480 #define ASN1_TFLG_EXPLICIT      ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
 481
 482 /* If tagging is in force these determine the
 483  * type of tag to use. Otherwise the tag is
 484  * determined by the underlying type. These
 485  * values reflect the actual octet format.
 486  */
 487
 488 /* Universal tag */
 489 #define ASN1_TFLG_UNIVERSAL     (0x0<<6)
 490 /* Application tag */
 491 #define ASN1_TFLG_APPLICATION   (0x1<<6)
 492 /* Context specific tag */
 493 #define ASN1_TFLG_CONTEXT       (0x2<<6)
 494 /* Private tag */
 495 #define ASN1_TFLG_PRIVATE       (0x3<<6)
 496
 497 #define ASN1_TFLG_TAG_CLASS     (0x3<<6)
 498
 499 /* These are for ANY DEFINED BY type. In this case
 500  * the 'item' field points to an ASN1_ADB structure
 501  * which contains a table of values to decode the
 502  * relevant type
 503  */
 504
 505 #define ASN1_TFLG_ADB_MASK      (0x3<<8)
 506
 507 #define ASN1_TFLG_ADB_OID       (0x1<<8)
 508
 509 #define ASN1_TFLG_ADB_INT       (0x1<<9)
 510
 511 /* This flag means a parent structure is passed
 512  * instead of the field: this is useful is a
 513  * SEQUENCE is being combined with a CHOICE for
 514  * example. Since this means the structure and
 515  * item name will differ we need to use the
 516  * ASN1_CHOICE_END_name() macro for example.
 517  */
 518
 519 #define ASN1_TFLG_COMBINE       (0x1<<10)
 520
 521 /* This is the actual ASN1 item itself */
 522
 523 struct ASN1_ITEM_st {
 524 char itype;                     /* The item type, primitive, SEQUENCE, CHOICE or extern */
 525 long utype;                     /* underlying type */
 526 const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains the contents */
 527 long tcount;                    /* Number of templates if SEQUENCE or CHOICE */
 528 const void *funcs;              /* functions that handle this type */
 529 long size;                      /* Structure size (usually)*/
 530 #ifndef NO_ASN1_FIELD_NAMES
 531 const char *sname;              /* Structure name */
 532 #endif
 533 };
 534
 535 /* These are values for the itype field and
 536  * determine how the type is interpreted.
 537  *
 538  * For PRIMITIVE types the underlying type
 539  * determines the behaviour if items is NULL.
 540  *
 541  * Otherwise templates must contain a single
 542  * template and the type is treated in the
 543  * same way as the type specified in the template.
 544  *
 545  * For SEQUENCE types the templates field points
 546  * to the members, the size field is the
 547  * structure size.
 548  *
 549  * For CHOICE types the templates field points
 550  * to each possible member (typically a union)
 551  * and the 'size' field is the offset of the
 552  * selector.
 553  *
 554  * The 'funcs' field is used for application
 555  * specific functions.
 556  *
 557  * For COMPAT types the funcs field gives a
 558  * set of functions that handle this type, this
 559  * supports the old d2i, i2d convention.
 560  *
 561  * The EXTERN type uses a new style d2i/i2d.
 562  * The new style should be used where possible
 563  * because it avoids things like the d2i IMPLICIT
 564  * hack.
 565  *
 566  * MSTRING is a multiple string type, it is used
 567  * for a CHOICE of character strings where the
 568  * actual strings all occupy an ASN1_STRING
 569  * structure. In this case the 'utype' field
 570  * has a special meaning, it is used as a mask
 571  * of acceptable types using the B_ASN1 constants.
 572  *
 573  */
 574
 575 #define ASN1_ITYPE_PRIMITIVE    0x0
 576
 577 #define ASN1_ITYPE_SEQUENCE     0x1
 578
 579 #define ASN1_ITYPE_CHOICE       0x2
 580
 581 #define ASN1_ITYPE_COMPAT       0x3
 582
 583 #define ASN1_ITYPE_EXTERN       0x4
 584
 585 #define ASN1_ITYPE_MSTRING      0x5
 586
 587 /* Cache for ASN1 tag and length, so we
 588  * don't keep re-reading it for things
 589  * like CHOICE
 590  */
 591
 592 struct ASN1_TLC_st{
 593         char valid;     /* Values below are valid */
 594         int ret;        /* return value */
 595         long plen;      /* length */
 596         int ptag;       /* class value */
 597         int pclass;     /* class value */
 598         int hdrlen;     /* header length */
 599 };
 600
 601 /* Typedefs for ASN1 function pointers */
 602
 603 typedef ASN1_VALUE * ASN1_new_func(void);
 604 typedef void ASN1_free_func(ASN1_VALUE *a);
 605 typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, unsigned char ** in, long length);
 606 typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in);
 607
 608 typedef int ASN1_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_ITEM *it,
 609                                         int tag, int aclass, char opt, ASN1_TLC *ctx);
 610
 611 typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
 612 typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
 613 typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
 614
 615 typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
 616 typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
 617
 618 typedef struct ASN1_COMPAT_FUNCS_st {
 619         ASN1_new_func *asn1_new;
 620         ASN1_free_func *asn1_free;
 621         ASN1_d2i_func *asn1_d2i;
 622         ASN1_i2d_func *asn1_i2d;
 623 } ASN1_COMPAT_FUNCS;
 624
 625 typedef struct ASN1_EXTERN_FUNCS_st {
 626         void *app_data;
 627         ASN1_ex_new_func *asn1_ex_new;
 628         ASN1_ex_free_func *asn1_ex_free;
 629         ASN1_ex_free_func *asn1_ex_clear;
 630         ASN1_ex_d2i *asn1_ex_d2i;
 631         ASN1_ex_i2d *asn1_ex_i2d;
 632 } ASN1_EXTERN_FUNCS;
 633
 634 typedef struct ASN1_PRIMITIVE_FUNCS_st {
 635         void *app_data;
 636         unsigned long flags;
 637         ASN1_ex_new_func *prim_new;
 638         ASN1_ex_free_func *prim_free;
 639         ASN1_ex_free_func *prim_clear;
 640         ASN1_primitive_c2i *prim_c2i;
 641         ASN1_primitive_i2c *prim_i2c;
 642 } ASN1_PRIMITIVE_FUNCS;
 643
 644 /* This is the ASN1_AUX structure: it handles various
 645  * miscellaneous requirements. For example the use of
 646  * reference counts and an informational callback.
 647  *
 648  * The "informational callback" is called at various
 649  * points during the ASN1 encoding and decoding. It can
 650  * be used to provide minor customisation of the structures
 651  * used. This is most useful where the supplied routines
 652  * *almost* do the right thing but need some extra help
 653  * at a few points. If the callback returns zero then
 654  * it is assumed a fatal error has occurred and the
 655  * main operation should be abandoned.
 656  *
 657  * If major changes in the default behaviour are required
 658  * then an external type is more appropriate.
 659  */
 660
 661 typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it);
 662
 663 typedef struct ASN1_AUX_st {
 664         void *app_data;
 665         int flags;
 666         int ref_offset;         /* Offset of reference value */
 667         int ref_lock;           /* Lock type to use */
 668         ASN1_aux_cb *asn1_cb;
 669         int enc_offset;         /* Offset of ASN1_ENCODING structure */
 670 } ASN1_AUX;
 671
 672 /* Flags in ASN1_AUX */
 673
 674 /* Use a reference count */
 675 #define ASN1_AFLG_REFCOUNT      1
 676 /* Save the encoding of structure (useful for signatures) */
 677 #define ASN1_AFLG_ENCODING      2
 678 /* The Sequence length is invalid */
 679 #define ASN1_AFLG_BROKEN        4
 680
 681 /* operation values for asn1_cb */
 682
 683 #define ASN1_OP_NEW_PRE         0
 684 #define ASN1_OP_NEW_POST        1
 685 #define ASN1_OP_FREE_PRE        2
 686 #define ASN1_OP_FREE_POST       3
 687 #define ASN1_OP_D2I_PRE         4
 688 #define ASN1_OP_D2I_POST        5
 689 #define ASN1_OP_I2D_PRE         6
 690 #define ASN1_OP_I2D_POST        7
 691
 692 /* Macro to implement a primitive type */
 693 #define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
 694 #define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
 695                                 ASN1_ITEM_start(itname) \
 696                                         ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
 697                                 ASN1_ITEM_end(itname)
 698
 699 /* Macro to implement a multi string type */
 700 #define IMPLEMENT_ASN1_MSTRING(itname, mask) \
 701                                 ASN1_ITEM_start(itname) \
 702                                         ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
 703                                 ASN1_ITEM_end(itname)
 704
 705 /* Macro to implement an ASN1_ITEM in terms of old style funcs */
 706
 707 #define IMPLEMENT_COMPAT_ASN1(sname) IMPLEMENT_COMPAT_ASN1_type(sname, V_ASN1_SEQUENCE)
 708
 709 #define IMPLEMENT_COMPAT_ASN1_type(sname, tag) \
 710         static const ASN1_COMPAT_FUNCS sname##_ff = { \
 711                 (ASN1_new_func *)sname##_new, \
 712                 (ASN1_free_func *)sname##_free, \
 713                 (ASN1_d2i_func *)d2i_##sname, \
 714                 (ASN1_i2d_func *)i2d_##sname, \
 715         }; \
 716         ASN1_ITEM_start(sname) \
 717                 ASN1_ITYPE_COMPAT, \
 718                 tag, \
 719                 NULL, \
 720                 0, \
 721                 &sname##_ff, \
 722                 0, \
 723                 #sname \
 724         ASN1_ITEM_end(sname)
 725
 726 #define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
 727         ASN1_ITEM_start(sname) \
 728                 ASN1_ITYPE_EXTERN, \
 729                 tag, \
 730                 NULL, \
 731                 0, \
 732                 &fptrs, \
 733                 0, \
 734                 #sname \
 735         ASN1_ITEM_end(sname)
 736
 737 /* Macro to implement standard functions in terms of ASN1_ITEM structures */
 738
 739 #define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
 740
 741 #define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
 742
 743 #define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
 744                         IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
 745
 746 #define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
 747         stname *fname##_new(void) \
 748         { \
 749                 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
 750         } \
 751         void fname##_free(stname *a) \
 752         { \
 753                 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
 754         }
 755
 756 #define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
 757         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
 758         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
 759
 760 #define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
 761         stname *d2i_##fname(stname **a, unsigned char **in, long len) \
 762         { \
 763                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
 764         } \
 765         int i2d_##fname(stname *a, unsigned char **out) \
 766         { \
 767                 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
 768         }
 769
 770 /* This includes evil casts to remove const: they will go away when full
 771  * ASN1 constification is done.
 772  */
 773 #define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
 774         stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
 775         { \
 776                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, (unsigned char **)in, len, ASN1_ITEM_rptr(itname));\
 777         } \
 778         int i2d_##fname(const stname *a, unsigned char **out) \
 779         { \
 780                 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
 781         }
 782
 783 #define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
 784         stname * stname##_dup(stname *x) \
 785         { \
 786         return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
 787         }
 788
 789 #define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
 790                 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
 791
 792 #define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
 793         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
 794         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
 795
 796 /* external definitions for primitive types */
 797
 798 DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
 799 DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
 800 DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
 801 DECLARE_ASN1_ITEM(ASN1_ANY)
 802 DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
 803 DECLARE_ASN1_ITEM(CBIGNUM)
 804 DECLARE_ASN1_ITEM(BIGNUM)
 805 DECLARE_ASN1_ITEM(LONG)
 806 DECLARE_ASN1_ITEM(ZLONG)
 807
 808 DECLARE_STACK_OF(ASN1_VALUE)
 809
 810 /* Functions used internally by the ASN1 code */
 811
 812 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
 813 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 814 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
 815 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
 816
 817 void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
 818 int ASN1_template_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_TEMPLATE *tt);
 819 int ASN1_item_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_ITEM *it,
 820                                 int tag, int aclass, char opt, ASN1_TLC *ctx);
 821
 822 int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
 823 int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt);
 824 void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 825
 826 int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
 827 int asn1_ex_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
 828
 829 int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it);
 830 int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it);
 831
 832 ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
 833
 834 const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr);
 835
 836 int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it);
 837
 838 void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it);
 839 void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 840 int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it);
 841 int asn1_enc_save(ASN1_VALUE **pval, unsigned char *in, int inlen, const ASN1_ITEM *it);
 842
 843 #ifdef  __cplusplus
 844 }
 845 #endif
 846 #endif