mingw/include/openssl/asn1t.h

   1 /* asn1t.h */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 2000.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59 #ifndef HEADER_ASN1T_H
  60 # define HEADER_ASN1T_H
  61
  62 # include <stddef.h>
  63 # include <openssl/e_os2.h>
  64 # include <openssl/asn1.h>
  65
  66 # ifdef OPENSSL_BUILD_SHLIBCRYPTO
  67 #  undef OPENSSL_EXTERN
  68 #  define OPENSSL_EXTERN OPENSSL_EXPORT
  69 # endif
  70
  71 /* ASN1 template defines, structures and functions */
  72
  73 #ifdef  __cplusplus
  74 extern "C" {
  75 #endif
  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 /* Macros for start and end of ASN1_ITEM definition */
  83
  84 #  define ASN1_ITEM_start(itname) \
  85         OPENSSL_GLOBAL const ASN1_ITEM itname##_it = {
  86
  87 #  define ASN1_ITEM_end(itname) \
  88                 };
  89
  90 # else
  91
  92 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
  93 #  define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr()))
  94
  95 /* Macros for start and end of ASN1_ITEM definition */
  96
  97 #  define ASN1_ITEM_start(itname) \
  98         const ASN1_ITEM * itname##_it(void) \
  99         { \
 100                 static const ASN1_ITEM local_it = {
 101
 102 #  define ASN1_ITEM_end(itname) \
 103                 }; \
 104         return &local_it; \
 105         }
 106
 107 # endif
 108
 109 /* Macros to aid ASN1 template writing */
 110
 111 # define ASN1_ITEM_TEMPLATE(tname) \
 112         static const ASN1_TEMPLATE tname##_item_tt
 113
 114 # define ASN1_ITEM_TEMPLATE_END(tname) \
 115         ;\
 116         ASN1_ITEM_start(tname) \
 117                 ASN1_ITYPE_PRIMITIVE,\
 118                 -1,\
 119                 &tname##_item_tt,\
 120                 0,\
 121                 NULL,\
 122                 0,\
 123                 #tname \
 124         ASN1_ITEM_end(tname)
 125
 126 /* This is a ASN1 type which just embeds a template */
 127
 128 /*-
 129  * This pair helps declare a SEQUENCE. We can do:
 130  *
 131  *      ASN1_SEQUENCE(stname) = {
 132  *              ... SEQUENCE components ...
 133  *      } ASN1_SEQUENCE_END(stname)
 134  *
 135  *      This will produce an ASN1_ITEM called stname_it
 136  *      for a structure called stname.
 137  *
 138  *      If you want the same structure but a different
 139  *      name then use:
 140  *
 141  *      ASN1_SEQUENCE(itname) = {
 142  *              ... SEQUENCE components ...
 143  *      } ASN1_SEQUENCE_END_name(stname, itname)
 144  *
 145  *      This will create an item called itname_it using
 146  *      a structure called stname.
 147  */
 148
 149 # define ASN1_SEQUENCE(tname) \
 150         static const ASN1_TEMPLATE tname##_seq_tt[]
 151
 152 # define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)
 153
 154 # define ASN1_SEQUENCE_END_name(stname, tname) \
 155         ;\
 156         ASN1_ITEM_start(tname) \
 157                 ASN1_ITYPE_SEQUENCE,\
 158                 V_ASN1_SEQUENCE,\
 159                 tname##_seq_tt,\
 160                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 161                 NULL,\
 162                 sizeof(stname),\
 163                 #stname \
 164         ASN1_ITEM_end(tname)
 165
 166 # define ASN1_NDEF_SEQUENCE(tname) \
 167         ASN1_SEQUENCE(tname)
 168
 169 # define ASN1_NDEF_SEQUENCE_cb(tname, cb) \
 170         ASN1_SEQUENCE_cb(tname, cb)
 171
 172 # define ASN1_SEQUENCE_cb(tname, cb) \
 173         static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
 174         ASN1_SEQUENCE(tname)
 175
 176 # define ASN1_BROKEN_SEQUENCE(tname) \
 177         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \
 178         ASN1_SEQUENCE(tname)
 179
 180 # define ASN1_SEQUENCE_ref(tname, cb, lck) \
 181         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), lck, cb, 0}; \
 182         ASN1_SEQUENCE(tname)
 183
 184 # define ASN1_SEQUENCE_enc(tname, enc, cb) \
 185         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
 186         ASN1_SEQUENCE(tname)
 187
 188 # define ASN1_NDEF_SEQUENCE_END(tname) \
 189         ;\
 190         ASN1_ITEM_start(tname) \
 191                 ASN1_ITYPE_NDEF_SEQUENCE,\
 192                 V_ASN1_SEQUENCE,\
 193                 tname##_seq_tt,\
 194                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 195                 NULL,\
 196                 sizeof(tname),\
 197                 #tname \
 198         ASN1_ITEM_end(tname)
 199
 200 # define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
 201
 202 # define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
 203
 204 # define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
 205
 206 # define ASN1_SEQUENCE_END_ref(stname, tname) \
 207         ;\
 208         ASN1_ITEM_start(tname) \
 209                 ASN1_ITYPE_SEQUENCE,\
 210                 V_ASN1_SEQUENCE,\
 211                 tname##_seq_tt,\
 212                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 213                 &tname##_aux,\
 214                 sizeof(stname),\
 215                 #stname \
 216         ASN1_ITEM_end(tname)
 217
 218 /*-
 219  * This pair helps declare a CHOICE type. We can do:
 220  *
 221  *      ASN1_CHOICE(chname) = {
 222  *              ... CHOICE options ...
 223  *      ASN1_CHOICE_END(chname)
 224  *
 225  *      This will produce an ASN1_ITEM called chname_it
 226  *      for a structure called chname. The structure
 227  *      definition must look like this:
 228  *      typedef struct {
 229  *              int type;
 230  *              union {
 231  *                      ASN1_SOMETHING *opt1;
 232  *                      ASN1_SOMEOTHER *opt2;
 233  *              } value;
 234  *      } chname;
 235  *
 236  *      the name of the selector must be 'type'.
 237  *      to use an alternative selector name use the
 238  *      ASN1_CHOICE_END_selector() version.
 239  */
 240
 241 # define ASN1_CHOICE(tname) \
 242         static const ASN1_TEMPLATE tname##_ch_tt[]
 243
 244 # define ASN1_CHOICE_cb(tname, cb) \
 245         static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
 246         ASN1_CHOICE(tname)
 247
 248 # define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
 249
 250 # define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
 251
 252 # define ASN1_CHOICE_END_selector(stname, tname, selname) \
 253         ;\
 254         ASN1_ITEM_start(tname) \
 255                 ASN1_ITYPE_CHOICE,\
 256                 offsetof(stname,selname) ,\
 257                 tname##_ch_tt,\
 258                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 259                 NULL,\
 260                 sizeof(stname),\
 261                 #stname \
 262         ASN1_ITEM_end(tname)
 263
 264 # define ASN1_CHOICE_END_cb(stname, tname, selname) \
 265         ;\
 266         ASN1_ITEM_start(tname) \
 267                 ASN1_ITYPE_CHOICE,\
 268                 offsetof(stname,selname) ,\
 269                 tname##_ch_tt,\
 270                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 271                 &tname##_aux,\
 272                 sizeof(stname),\
 273                 #stname \
 274         ASN1_ITEM_end(tname)
 275
 276 /* This helps with the template wrapper form of ASN1_ITEM */
 277
 278 # define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
 279         (flags), (tag), 0,\
 280         #name, ASN1_ITEM_ref(type) }
 281
 282 /* These help with SEQUENCE or CHOICE components */
 283
 284 /* used to declare other types */
 285
 286 # define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
 287         (flags), (tag), offsetof(stname, field),\
 288         #field, ASN1_ITEM_ref(type) }
 289
 290 /* used when the structure is combined with the parent */
 291
 292 # define ASN1_EX_COMBINE(flags, tag, type) { \
 293         (flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) }
 294
 295 /* implicit and explicit helper macros */
 296
 297 # define ASN1_IMP_EX(stname, field, type, tag, ex) \
 298                 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
 299
 300 # define ASN1_EXP_EX(stname, field, type, tag, ex) \
 301                 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
 302
 303 /* Any defined by macros: the field used is in the table itself */
 304
 305 # ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
 306 #  define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
 307 #  define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
 308 # else
 309 #  define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, tblname##_adb }
 310 #  define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, tblname##_adb }
 311 # endif
 312 /* Plain simple type */
 313 # define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
 314
 315 /* OPTIONAL simple type */
 316 # define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 317
 318 /* IMPLICIT tagged simple type */
 319 # define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
 320
 321 /* IMPLICIT tagged OPTIONAL simple type */
 322 # define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
 323
 324 /* Same as above but EXPLICIT */
 325
 326 # define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
 327 # define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
 328
 329 /* SEQUENCE OF type */
 330 # define ASN1_SEQUENCE_OF(stname, field, type) \
 331                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
 332
 333 /* OPTIONAL SEQUENCE OF */
 334 # define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
 335                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 336
 337 /* Same as above but for SET OF */
 338
 339 # define ASN1_SET_OF(stname, field, type) \
 340                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
 341
 342 # define ASN1_SET_OF_OPT(stname, field, type) \
 343                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 344
 345 /* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
 346
 347 # define ASN1_IMP_SET_OF(stname, field, type, tag) \
 348                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
 349
 350 # define ASN1_EXP_SET_OF(stname, field, type, tag) \
 351                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
 352
 353 # define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
 354                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
 355
 356 # define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
 357                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
 358
 359 # define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
 360                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
 361
 362 # define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
 363                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 364
 365 # define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
 366                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
 367
 368 # define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
 369                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 370
 371 /* EXPLICIT using indefinite length constructed form */
 372 # define ASN1_NDEF_EXP(stname, field, type, tag) \
 373                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF)
 374
 375 /* EXPLICIT OPTIONAL using indefinite length constructed form */
 376 # define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \
 377                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF)
 378
 379 /* Macros for the ASN1_ADB structure */
 380
 381 # define ASN1_ADB(name) \
 382         static const ASN1_ADB_TABLE name##_adbtbl[]
 383
 384 # ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
 385
 386 #  define ASN1_ADB_END(name, flags, field, app_table, def, none) \
 387         ;\
 388         static const ASN1_ADB name##_adb = {\
 389                 flags,\
 390                 offsetof(name, field),\
 391                 app_table,\
 392                 name##_adbtbl,\
 393                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
 394                 def,\
 395                 none\
 396         }
 397
 398 # else
 399
 400 #  define ASN1_ADB_END(name, flags, field, app_table, def, none) \
 401         ;\
 402         static const ASN1_ITEM *name##_adb(void) \
 403         { \
 404         static const ASN1_ADB internal_adb = \
 405                 {\
 406                 flags,\
 407                 offsetof(name, field),\
 408                 app_table,\
 409                 name##_adbtbl,\
 410                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
 411                 def,\
 412                 none\
 413                 }; \
 414                 return (const ASN1_ITEM *) &internal_adb; \
 415         } \
 416         void dummy_function(void)
 417
 418 # endif
 419
 420 # define ADB_ENTRY(val, template) {val, template}
 421
 422 # define ASN1_ADB_TEMPLATE(name) \
 423         static const ASN1_TEMPLATE name##_tt
 424
 425 /*
 426  * This is the ASN1 template structure that defines a wrapper round the
 427  * actual type. It determines the actual position of the field in the value
 428  * structure, various flags such as OPTIONAL and the field name.
 429  */
 430
 431 struct ASN1_TEMPLATE_st {
 432     unsigned long flags;        /* Various flags */
 433     long tag;                   /* tag, not used if no tagging */
 434     unsigned long offset;       /* Offset of this field in structure */
 435 # ifndef NO_ASN1_FIELD_NAMES
 436     const char *field_name;     /* Field name */
 437 # endif
 438     ASN1_ITEM_EXP *item;        /* Relevant ASN1_ITEM or ASN1_ADB */
 439 };
 440
 441 /* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
 442
 443 # define ASN1_TEMPLATE_item(t) (t->item_ptr)
 444 # define ASN1_TEMPLATE_adb(t) (t->item_ptr)
 445
 446 typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
 447 typedef struct ASN1_ADB_st ASN1_ADB;
 448
 449 struct ASN1_ADB_st {
 450     unsigned long flags;        /* Various flags */
 451     unsigned long offset;       /* Offset of selector field */
 452     STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
 453     const ASN1_ADB_TABLE *tbl;  /* Table of possible types */
 454     long tblcount;              /* Number of entries in tbl */
 455     const ASN1_TEMPLATE *default_tt; /* Type to use if no match */
 456     const ASN1_TEMPLATE *null_tt; /* Type to use if selector is NULL */
 457 };
 458
 459 struct ASN1_ADB_TABLE_st {
 460     long value;                 /* NID for an object or value for an int */
 461     const ASN1_TEMPLATE tt;     /* item for this value */
 462 };
 463
 464 /* template flags */
 465
 466 /* Field is optional */
 467 # define ASN1_TFLG_OPTIONAL      (0x1)
 468
 469 /* Field is a SET OF */
 470 # define ASN1_TFLG_SET_OF        (0x1 << 1)
 471
 472 /* Field is a SEQUENCE OF */
 473 # define ASN1_TFLG_SEQUENCE_OF   (0x2 << 1)
 474
 475 /*
 476  * Special case: this refers to a SET OF that will be sorted into DER order
 477  * when encoded *and* the corresponding STACK will be modified to match the
 478  * new order.
 479  */
 480 # define ASN1_TFLG_SET_ORDER     (0x3 << 1)
 481
 482 /* Mask for SET OF or SEQUENCE OF */
 483 # define ASN1_TFLG_SK_MASK       (0x3 << 1)
 484
 485 /*
 486  * These flags mean the tag should be taken from the tag field. If EXPLICIT
 487  * then the underlying type is used for the inner tag.
 488  */
 489
 490 /* IMPLICIT tagging */
 491 # define ASN1_TFLG_IMPTAG        (0x1 << 3)
 492
 493 /* EXPLICIT tagging, inner tag from underlying type */
 494 # define ASN1_TFLG_EXPTAG        (0x2 << 3)
 495
 496 # define ASN1_TFLG_TAG_MASK      (0x3 << 3)
 497
 498 /* context specific IMPLICIT */
 499 # define ASN1_TFLG_IMPLICIT      ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
 500
 501 /* context specific EXPLICIT */
 502 # define ASN1_TFLG_EXPLICIT      ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
 503
 504 /*
 505  * If tagging is in force these determine the type of tag to use. Otherwise
 506  * the tag is determined by the underlying type. These values reflect the
 507  * actual octet format.
 508  */
 509
 510 /* Universal tag */
 511 # define ASN1_TFLG_UNIVERSAL     (0x0<<6)
 512 /* Application tag */
 513 # define ASN1_TFLG_APPLICATION   (0x1<<6)
 514 /* Context specific tag */
 515 # define ASN1_TFLG_CONTEXT       (0x2<<6)
 516 /* Private tag */
 517 # define ASN1_TFLG_PRIVATE       (0x3<<6)
 518
 519 # define ASN1_TFLG_TAG_CLASS     (0x3<<6)
 520
 521 /*
 522  * These are for ANY DEFINED BY type. In this case the 'item' field points to
 523  * an ASN1_ADB structure which contains a table of values to decode the
 524  * relevant type
 525  */
 526
 527 # define ASN1_TFLG_ADB_MASK      (0x3<<8)
 528
 529 # define ASN1_TFLG_ADB_OID       (0x1<<8)
 530
 531 # define ASN1_TFLG_ADB_INT       (0x1<<9)
 532
 533 /*
 534  * This flag means a parent structure is passed instead of the field: this is
 535  * useful is a SEQUENCE is being combined with a CHOICE for example. Since
 536  * this means the structure and item name will differ we need to use the
 537  * ASN1_CHOICE_END_name() macro for example.
 538  */
 539
 540 # define ASN1_TFLG_COMBINE       (0x1<<10)
 541
 542 /*
 543  * This flag when present in a SEQUENCE OF, SET OF or EXPLICIT causes
 544  * indefinite length constructed encoding to be used if required.
 545  */
 546
 547 # define ASN1_TFLG_NDEF          (0x1<<11)
 548
 549 /* This is the actual ASN1 item itself */
 550
 551 struct ASN1_ITEM_st {
 552     char itype;                 /* The item type, primitive, SEQUENCE, CHOICE
 553                                  * or extern */
 554     long utype;                 /* underlying type */
 555     const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains
 556                                      * the contents */
 557     long tcount;                /* Number of templates if SEQUENCE or CHOICE */
 558     const void *funcs;          /* functions that handle this type */
 559     long size;                  /* Structure size (usually) */
 560 # ifndef NO_ASN1_FIELD_NAMES
 561     const char *sname;          /* Structure name */
 562 # endif
 563 };
 564
 565 /*-
 566  * These are values for the itype field and
 567  * determine how the type is interpreted.
 568  *
 569  * For PRIMITIVE types the underlying type
 570  * determines the behaviour if items is NULL.
 571  *
 572  * Otherwise templates must contain a single
 573  * template and the type is treated in the
 574  * same way as the type specified in the template.
 575  *
 576  * For SEQUENCE types the templates field points
 577  * to the members, the size field is the
 578  * structure size.
 579  *
 580  * For CHOICE types the templates field points
 581  * to each possible member (typically a union)
 582  * and the 'size' field is the offset of the
 583  * selector.
 584  *
 585  * The 'funcs' field is used for application
 586  * specific functions.
 587  *
 588  * For COMPAT types the funcs field gives a
 589  * set of functions that handle this type, this
 590  * supports the old d2i, i2d convention.
 591  *
 592  * The EXTERN type uses a new style d2i/i2d.
 593  * The new style should be used where possible
 594  * because it avoids things like the d2i IMPLICIT
 595  * hack.
 596  *
 597  * MSTRING is a multiple string type, it is used
 598  * for a CHOICE of character strings where the
 599  * actual strings all occupy an ASN1_STRING
 600  * structure. In this case the 'utype' field
 601  * has a special meaning, it is used as a mask
 602  * of acceptable types using the B_ASN1 constants.
 603  *
 604  * NDEF_SEQUENCE is the same as SEQUENCE except
 605  * that it will use indefinite length constructed
 606  * encoding if requested.
 607  *
 608  */
 609
 610 # define ASN1_ITYPE_PRIMITIVE            0x0
 611
 612 # define ASN1_ITYPE_SEQUENCE             0x1
 613
 614 # define ASN1_ITYPE_CHOICE               0x2
 615
 616 # define ASN1_ITYPE_COMPAT               0x3
 617
 618 # define ASN1_ITYPE_EXTERN               0x4
 619
 620 # define ASN1_ITYPE_MSTRING              0x5
 621
 622 # define ASN1_ITYPE_NDEF_SEQUENCE        0x6
 623
 624 /*
 625  * Cache for ASN1 tag and length, so we don't keep re-reading it for things
 626  * like CHOICE
 627  */
 628
 629 struct ASN1_TLC_st {
 630     char valid;                 /* Values below are valid */
 631     int ret;                    /* return value */
 632     long plen;                  /* length */
 633     int ptag;                   /* class value */
 634     int pclass;                 /* class value */
 635     int hdrlen;                 /* header length */
 636 };
 637
 638 /* Typedefs for ASN1 function pointers */
 639
 640 typedef ASN1_VALUE *ASN1_new_func(void);
 641 typedef void ASN1_free_func(ASN1_VALUE *a);
 642 typedef ASN1_VALUE *ASN1_d2i_func(ASN1_VALUE **a, const unsigned char **in,
 643                                   long length);
 644 typedef int ASN1_i2d_func(ASN1_VALUE *a, unsigned char **in);
 645
 646 typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
 647                         const ASN1_ITEM *it, int tag, int aclass, char opt,
 648                         ASN1_TLC *ctx);
 649
 650 typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
 651                         const ASN1_ITEM *it, int tag, int aclass);
 652 typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
 653 typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
 654
 655 typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont,
 656                                int *putype, const ASN1_ITEM *it);
 657 typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont,
 658                                int len, int utype, char *free_cont,
 659                                const ASN1_ITEM *it);
 660
 661 typedef struct ASN1_COMPAT_FUNCS_st {
 662     ASN1_new_func *asn1_new;
 663     ASN1_free_func *asn1_free;
 664     ASN1_d2i_func *asn1_d2i;
 665     ASN1_i2d_func *asn1_i2d;
 666 } ASN1_COMPAT_FUNCS;
 667
 668 typedef struct ASN1_EXTERN_FUNCS_st {
 669     void *app_data;
 670     ASN1_ex_new_func *asn1_ex_new;
 671     ASN1_ex_free_func *asn1_ex_free;
 672     ASN1_ex_free_func *asn1_ex_clear;
 673     ASN1_ex_d2i *asn1_ex_d2i;
 674     ASN1_ex_i2d *asn1_ex_i2d;
 675 } ASN1_EXTERN_FUNCS;
 676
 677 typedef struct ASN1_PRIMITIVE_FUNCS_st {
 678     void *app_data;
 679     unsigned long flags;
 680     ASN1_ex_new_func *prim_new;
 681     ASN1_ex_free_func *prim_free;
 682     ASN1_ex_free_func *prim_clear;
 683     ASN1_primitive_c2i *prim_c2i;
 684     ASN1_primitive_i2c *prim_i2c;
 685 } ASN1_PRIMITIVE_FUNCS;
 686
 687 /*
 688  * This is the ASN1_AUX structure: it handles various miscellaneous
 689  * requirements. For example the use of reference counts and an informational
 690  * callback. The "informational callback" is called at various points during
 691  * the ASN1 encoding and decoding. It can be used to provide minor
 692  * customisation of the structures used. This is most useful where the
 693  * supplied routines *almost* do the right thing but need some extra help at
 694  * a few points. If the callback returns zero then it is assumed a fatal
 695  * error has occurred and the main operation should be abandoned. If major
 696  * changes in the default behaviour are required then an external type is
 697  * 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 /*
 819  * This includes evil casts to remove const: they will go away when full ASN1
 820  * constification is done.
 821  */
 822 # define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
 823         stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
 824         { \
 825                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
 826         } \
 827         int i2d_##fname(const stname *a, unsigned char **out) \
 828         { \
 829                 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
 830         }
 831
 832 # define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
 833         stname * stname##_dup(stname *x) \
 834         { \
 835         return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
 836         }
 837
 838 # define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
 839                 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
 840
 841 # define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
 842         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
 843         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
 844
 845 /* external definitions for primitive types */
 846
 847 DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
 848 DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
 849 DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
 850 DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
 851 DECLARE_ASN1_ITEM(CBIGNUM)
 852 DECLARE_ASN1_ITEM(BIGNUM)
 853 DECLARE_ASN1_ITEM(LONG)
 854 DECLARE_ASN1_ITEM(ZLONG)
 855
 856 DECLARE_STACK_OF(ASN1_VALUE)
 857
 858 /* Functions used internally by the ASN1 code */
 859
 860 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
 861 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 862 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
 863 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
 864
 865 void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
 866 int ASN1_template_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
 867                       const ASN1_TEMPLATE *tt);
 868 int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
 869                      const ASN1_ITEM *it, int tag, int aclass, char opt,
 870                      ASN1_TLC *ctx);
 871
 872 int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out,
 873                      const ASN1_ITEM *it, int tag, int aclass);
 874 int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out,
 875                       const ASN1_TEMPLATE *tt);
 876 void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 877
 878 int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,
 879                 const ASN1_ITEM *it);
 880 int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
 881                 int utype, char *free_cont, const ASN1_ITEM *it);
 882
 883 int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it);
 884 int asn1_set_choice_selector(ASN1_VALUE **pval, int value,
 885                              const ASN1_ITEM *it);
 886
 887 ASN1_VALUE **asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
 888
 889 const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt,
 890                                  int nullerr);
 891
 892 int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it);
 893
 894 void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it);
 895 void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 896 int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval,
 897                      const ASN1_ITEM *it);
 898 int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen,
 899                   const ASN1_ITEM *it);
 900
 901 #ifdef  __cplusplus
 902 }
 903 #endif
 904 #endif