crypto/asn1/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/asn1.h>
  63
  64 /* ASN1 template defines, structures and functions */
  65
  66 #ifdef  __cplusplus
  67 extern "C" {
  68 #endif
  69
  70 /* Macros to aid ASN1 template writing */
  71
  72 #define ASN1_ITEM_TEMPLATE(tname) \
  73         const static ASN1_TEMPLATE tname##_item_tt
  74
  75 #define ASN1_ITEM_TEMPLATE_END(tname) \
  76         ;\
  77         const ASN1_ITEM tname##_it = { \
  78                 ASN1_ITYPE_PRIMITIVE,\
  79                 -1,\
  80                 &tname##_item_tt,\
  81                 0,\
  82                 NULL,\
  83                 0,\
  84                 #tname \
  85         }
  86
  87
  88 /* This is a ASN1 type which just embeds a template */
  89
  90 /* This pair helps declare a SEQUENCE. We can do:
  91  *
  92  *      ASN1_SEQUENCE(stname) = {
  93  *              ... SEQUENCE components ...
  94  *      } ASN1_SEQUENCE_END(stname);
  95  *
  96  *      This will produce an ASN1_ITEM called stname_it
  97  *      for a structure called stname.
  98  *
  99  *      If you want the same structure but a different
 100  *      name then use:
 101  *
 102  *      ASN1_SEQUENCE(itname) = {
 103  *              ... SEQUENCE components ...
 104  *      } ASN1_SEQUENCE_END_name(stname, itname);
 105  *
 106  *      This will create an item called itname_it using
 107  *      a structure called stname.
 108  */
 109
 110 #define ASN1_SEQUENCE(tname) \
 111         const static ASN1_TEMPLATE tname##_seq_tt[]
 112
 113 #define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)
 114
 115 #define ASN1_SEQUENCE_END_name(stname, tname) \
 116         ;\
 117         const ASN1_ITEM tname##_it = { \
 118                 ASN1_ITYPE_SEQUENCE,\
 119                 V_ASN1_SEQUENCE,\
 120                 tname##_seq_tt,\
 121                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 122                 NULL,\
 123                 sizeof(stname),\
 124                 #stname \
 125         }
 126
 127 #define ASN1_SEQUENCE_cb(tname, cb) \
 128         const static ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
 129         ASN1_SEQUENCE(tname)
 130
 131 #define ASN1_BROKEN_SEQUENCE(tname) \
 132         const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \
 133         ASN1_SEQUENCE(tname)
 134
 135 #define ASN1_SEQUENCE_ref(tname, cb, lck) \
 136         const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), lck, cb, 0}; \
 137         ASN1_SEQUENCE(tname)
 138
 139 #define ASN1_SEQUENCE_enc(tname, enc, cb) \
 140         const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
 141         ASN1_SEQUENCE(tname)
 142
 143 #define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
 144
 145 #define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
 146
 147 #define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
 148
 149 #define ASN1_SEQUENCE_END_ref(stname, tname) \
 150         ;\
 151         const ASN1_ITEM tname##_it = { \
 152                 ASN1_ITYPE_SEQUENCE,\
 153                 V_ASN1_SEQUENCE,\
 154                 tname##_seq_tt,\
 155                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
 156                 &tname##_aux,\
 157                 sizeof(stname),\
 158                 #stname \
 159         }
 160
 161
 162 /* This pair helps declare a CHOICE type. We can do:
 163  *
 164  *      ASN1_CHOICE(chname) = {
 165  *              ... CHOICE options ...
 166  *      ASN1_CHOICE_END(chname);
 167  *
 168  *      This will produce an ASN1_ITEM called chname_it
 169  *      for a structure called chname. The structure
 170  *      definition must look like this:
 171  *      typedef struct {
 172  *              int type;
 173  *              union {
 174  *                      ASN1_SOMETHING *opt1;
 175  *                      ASN1_SOMEOTHER *opt2;
 176  *              } value;
 177  *      } chname;
 178  *
 179  *      the name of the selector must be 'type'.
 180  *      to use an alternative selector name use the
 181  *      ASN1_CHOICE_END_selector() version.
 182  */
 183
 184 #define ASN1_CHOICE(tname) \
 185         const static ASN1_TEMPLATE tname##_ch_tt[]
 186
 187 #define ASN1_CHOICE_cb(tname, cb) \
 188         const static ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
 189         ASN1_CHOICE(tname)
 190
 191 #define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
 192
 193 #define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
 194
 195 #define ASN1_CHOICE_END_selector(stname, tname, selname) \
 196         ;\
 197         const ASN1_ITEM tname##_it = { \
 198                 ASN1_ITYPE_CHOICE,\
 199                 offsetof(stname,selname) ,\
 200                 tname##_ch_tt,\
 201                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 202                 NULL,\
 203                 sizeof(stname),\
 204                 #stname \
 205         }
 206
 207 #define ASN1_CHOICE_END_cb(stname, tname, selname) \
 208         ;\
 209         const ASN1_ITEM tname##_it = { \
 210                 ASN1_ITYPE_CHOICE,\
 211                 offsetof(stname,selname) ,\
 212                 tname##_ch_tt,\
 213                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
 214                 &tname##_aux,\
 215                 sizeof(stname),\
 216                 #stname \
 217         }
 218
 219 /* This helps with the template wrapper form of ASN1_ITEM */
 220
 221 #define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
 222         (flags), (tag), 0,\
 223         #name, &(type##_it) }
 224
 225 /* These help with SEQUENCE or CHOICE components */
 226
 227 /* used to declare other types */
 228
 229 #define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
 230         (flags), (tag), offsetof(stname, field),\
 231         #field, &(type##_it) }
 232
 233 /* used when the structure is combined with the parent */
 234
 235 #define ASN1_EX_COMBINE(flags, tag, type) { \
 236         (flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, &(type##_it) }
 237
 238 /* implicit and explicit helper macros */
 239
 240 #define ASN1_IMP_EX(stname, field, type, tag, ex) \
 241                 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
 242
 243 #define ASN1_EXP_EX(stname, field, type, tag, ex) \
 244                 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
 245
 246 /* Any defined by macros: the field used is in the table itself */
 247
 248 #define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, &(tblname##_adb) }
 249 #define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, &(tblname##_adb) }
 250
 251 /* Plain simple type */
 252 #define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
 253
 254 /* OPTIONAL simple type */
 255 #define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 256
 257 /* IMPLICIT tagged simple type */
 258 #define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
 259
 260 /* IMPLICIT tagged OPTIONAL simple type */
 261 #define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
 262
 263 /* Same as above but EXPLICIT */
 264
 265 #define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
 266 #define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
 267
 268 /* SEQUENCE OF type */
 269 #define ASN1_SEQUENCE_OF(stname, field, type) \
 270                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
 271
 272 /* OPTIONAL SEQUENCE OF */
 273 #define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
 274                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 275
 276 /* Same as above but for SET OF */
 277
 278 #define ASN1_SET_OF(stname, field, type) \
 279                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
 280
 281 #define ASN1_SET_OF_OPT(stname, field, type) \
 282                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
 283
 284 /* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
 285
 286 #define ASN1_IMP_SET_OF(stname, field, type, tag) \
 287                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
 288
 289 #define ASN1_EXP_SET_OF(stname, field, type, tag) \
 290                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
 291
 292 #define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
 293                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
 294
 295 #define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
 296                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
 297
 298 #define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
 299                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
 300
 301 #define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
 302                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 303
 304 #define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
 305                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
 306
 307 #define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
 308                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 309
 310 /* Macros for the ASN1_ADB structure */
 311
 312 #define ASN1_ADB(name) \
 313         const static ASN1_ADB_TABLE name##_adbtbl[]
 314
 315 #define ASN1_ADB_END(name, flags, field, app_table, def, none) \
 316         ;\
 317         const static ASN1_ADB name##_adb = {\
 318                 flags,\
 319                 offsetof(name, field),\
 320                 app_table,\
 321                 name##_adbtbl,\
 322                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
 323                 def,\
 324                 none\
 325         }
 326
 327 #define ADB_ENTRY(val, template) {val, template}
 328
 329 #define ASN1_ADB_TEMPLATE(name) \
 330         const static ASN1_TEMPLATE name##_tt
 331
 332 /* This is the ASN1 template structure that defines
 333  * a wrapper round the actual type. It determines the
 334  * actual position of the field in the value structure,
 335  * various flags such as OPTIONAL and the field name.
 336  */
 337
 338 struct ASN1_TEMPLATE_st {
 339 unsigned long flags;            /* Various flags */
 340 long tag;                       /* tag, not used if no tagging */
 341 unsigned long offset;           /* Offset of this field in structure */
 342 #ifndef NO_ASN1_FIELD_NAMES
 343 char *field_name;               /* Field name */
 344 #endif
 345 const void *item;               /* Relevant ASN1_ITEM or ASN1_ADB */
 346 };
 347
 348
 349 typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
 350 typedef struct ASN1_ADB_st ASN1_ADB;
 351
 352 struct ASN1_ADB_st {
 353         unsigned long flags;    /* Various flags */
 354         unsigned long offset;   /* Offset of selector field */
 355         STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
 356         const ASN1_ADB_TABLE *tbl;      /* Table of possible types */
 357         long tblcount;          /* Number of entries in tbl */
 358         const ASN1_TEMPLATE *default_tt;  /* Type to use if no match */
 359         const ASN1_TEMPLATE *null_tt;  /* Type to use if selector is NULL */
 360 };
 361
 362 struct ASN1_ADB_TABLE_st {
 363         long value;             /* NID for an object or value for an int */
 364         const ASN1_TEMPLATE tt;         /* item for this value */
 365 };
 366
 367 /* template flags */
 368
 369 /* Field is optional */
 370 #define ASN1_TFLG_OPTIONAL      (0x1)
 371
 372 /* Field is a SET OF */
 373 #define ASN1_TFLG_SET_OF        (0x1 << 1)
 374
 375 /* Field is a SEQUENCE OF */
 376 #define ASN1_TFLG_SEQUENCE_OF   (0x2 << 1)
 377
 378 #define ASN1_TFLG_SK_MASK       (0x3 << 1)
 379
 380 /* These flags mean the tag should be taken from the
 381  * tag field. If EXPLICIT then the underlying type
 382  * is used for the inner tag.
 383  */
 384
 385 /* IMPLICIT tagging */
 386 #define ASN1_TFLG_IMPTAG        (0x1 << 3)
 387
 388
 389 /* EXPLICIT tagging, inner tag from underlying type */
 390 #define ASN1_TFLG_EXPTAG        (0x2 << 3)
 391
 392 #define ASN1_TFLG_TAG_MASK      (0x3 << 3)
 393
 394 /* context specific IMPLICIT */
 395 #define ASN1_TFLG_IMPLICIT      ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
 396
 397 /* context specific EXPLICIT */
 398 #define ASN1_TFLG_EXPLICIT      ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
 399
 400 /* If tagging is in force these determine the
 401  * type of tag to use. Otherwise the tag is
 402  * determined by the underlying type. These
 403  * values reflect the actual octet format.
 404  */
 405
 406 /* Universal tag */
 407 #define ASN1_TFLG_UNIVERSAL     (0x0<<6)
 408 /* Application tag */
 409 #define ASN1_TFLG_APPLICATION   (0x1<<6)
 410 /* Context specific tag */
 411 #define ASN1_TFLG_CONTEXT       (0x2<<6)
 412 /* Private tag */
 413 #define ASN1_TFLG_PRIVATE       (0x3<<6)
 414
 415 #define ASN1_TFLG_TAG_CLASS     (0x3<<6)
 416
 417 /* These are for ANY DEFINED BY type. In this case
 418  * the 'item' field points to an ASN1_ADB structure
 419  * which contains a table of values to decode the
 420  * relevant type
 421  */
 422
 423 #define ASN1_TFLG_ADB_MASK      (0x3<<8)
 424
 425 #define ASN1_TFLG_ADB_OID       (0x1<<8)
 426
 427 #define ASN1_TFLG_ADB_INT       (0x1<<9)
 428
 429 /* This flag means a parent structure is passed
 430  * instead of the field: this is useful is a
 431  * SEQUENCE is being combined with a CHOICE for
 432  * example. Since this means the structure and
 433  * item name will differ we need to use the
 434  * ASN1_CHOICE_END_name() macro for example.
 435  */
 436
 437 #define ASN1_TFLG_COMBINE       (0x1<<10)
 438
 439 /* This is the actual ASN1 item itself */
 440
 441 struct ASN1_ITEM_st {
 442 char itype;                     /* The item type, primitive, SEQUENCE, CHOICE or extern */
 443 long utype;                     /* underlying type */
 444 const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains the contents */
 445 long tcount;                    /* Number of templates if SEQUENCE or CHOICE */
 446 const void *funcs;              /* functions that handle this type */
 447 long size;                      /* Structure size (usually)*/
 448 #ifndef NO_ASN1_FIELD_NAMES
 449 const char *sname;              /* Structure name */
 450 #endif
 451 };
 452
 453 /* These are values for the itype field and
 454  * determine how the type is interpreted.
 455  *
 456  * For PRIMITIVE types the underlying type
 457  * determines the behaviour if items is NULL.
 458  *
 459  * Otherwise templates must contain a single
 460  * template and the type is treated in the
 461  * same way as the type specified in the template.
 462  *
 463  * For SEQUENCE types the templates field points
 464  * to the members, the size field is the
 465  * structure size.
 466  *
 467  * For CHOICE types the templates field points
 468  * to each possible member (typically a union)
 469  * and the 'size' field is the offset of the
 470  * selector.
 471  *
 472  * The 'funcs' field is used for application
 473  * specific functions.
 474  *
 475  * For COMPAT types the funcs field gives a
 476  * set of functions that handle this type, this
 477  * supports the old d2i, i2d convention.
 478  *
 479  * The EXTERN type uses a new style d2i/i2d.
 480  * The new style should be used where possible
 481  * because it avoids things like the d2i IMPLICIT
 482  * hack.
 483  *
 484  * MSTRING is a multiple string type, it is used
 485  * for a CHOICE of character strings where the
 486  * actual strings all occupy an ASN1_STRING
 487  * structure. In this case the 'utype' field
 488  * has a special meaning, it is used as a mask
 489  * of acceptable types using the B_ASN1 constants.
 490  *
 491  */
 492
 493 #define ASN1_ITYPE_PRIMITIVE    0x0
 494
 495 #define ASN1_ITYPE_SEQUENCE     0x1
 496
 497 #define ASN1_ITYPE_CHOICE       0x2
 498
 499 #define ASN1_ITYPE_COMPAT       0x3
 500
 501 #define ASN1_ITYPE_EXTERN       0x4
 502
 503 #define ASN1_ITYPE_MSTRING      0x5
 504
 505 /* Cache for ASN1 tag and length, so we
 506  * don't keep re-reading it for things
 507  * like CHOICE
 508  */
 509
 510 struct ASN1_TLC_st{
 511         char valid;     /* Values below are valid */
 512         int ret;        /* return value */
 513         long plen;      /* length */
 514         int ptag;       /* class value */
 515         int pclass;     /* class value */
 516         int hdrlen;     /* header length */
 517 };
 518
 519 /* Typedefs for ASN1 function pointers */
 520
 521 typedef ASN1_VALUE * ASN1_new_func(void);
 522 typedef void ASN1_free_func(ASN1_VALUE *a);
 523 typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, unsigned char ** in, long length);
 524 typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in);
 525
 526 typedef int ASN1_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_ITEM *it,
 527                                         int tag, int aclass, char opt, ASN1_TLC *ctx);
 528
 529 typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
 530 typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
 531 typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
 532
 533 typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
 534 typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
 535
 536 typedef struct ASN1_COMPAT_FUNCS_st {
 537         ASN1_new_func *asn1_new;
 538         ASN1_free_func *asn1_free;
 539         ASN1_d2i_func *asn1_d2i;
 540         ASN1_i2d_func *asn1_i2d;
 541 } ASN1_COMPAT_FUNCS;
 542
 543 typedef struct ASN1_EXTERN_FUNCS_st {
 544         void *app_data;
 545         ASN1_ex_new_func *asn1_ex_new;
 546         ASN1_ex_free_func *asn1_ex_free;
 547         ASN1_ex_free_func *asn1_ex_clear;
 548         ASN1_ex_d2i *asn1_ex_d2i;
 549         ASN1_ex_i2d *asn1_ex_i2d;
 550 } ASN1_EXTERN_FUNCS;
 551
 552 typedef struct ASN1_PRIMITIVE_FUNCS_st {
 553         void *app_data;
 554         unsigned long flags;
 555         ASN1_ex_new_func *prim_new;
 556         ASN1_ex_free_func *prim_free;
 557         ASN1_ex_free_func *prim_clear;
 558         ASN1_primitive_c2i *prim_c2i;
 559         ASN1_primitive_i2c *prim_i2c;
 560 } ASN1_PRIMITIVE_FUNCS;
 561
 562 /* This is the ASN1_AUX structure: it handles various
 563  * miscellaneous requirements. For example the use of
 564  * reference counts and an informational callback.
 565  *
 566  * The "informational callback" is called at various
 567  * points during the ASN1 encoding and decoding. It can
 568  * be used to provide minor customisation of the structures
 569  * used. This is most useful where the supplied routines
 570  * *almost* do the right thing but need some extra help
 571  * at a few points. If the callback returns zero then
 572  * it is assumed a fatal error has occurred and the
 573  * main operation should be abandoned.
 574  *
 575  * If major changes in the default behaviour are required
 576  * then an external type is more appropriate.
 577  */
 578
 579 typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it);
 580
 581 typedef struct ASN1_AUX_st {
 582         void *app_data;
 583         int flags;
 584         int ref_offset;         /* Offset of reference value */
 585         int ref_lock;           /* Lock type to use */
 586         ASN1_aux_cb *asn1_cb;
 587         int enc_offset;         /* Offset of ASN1_ENCODING structure */
 588 } ASN1_AUX;
 589
 590 /* Flags in ASN1_AUX */
 591
 592 /* Use a reference count */
 593 #define ASN1_AFLG_REFCOUNT      1
 594 /* Save the encoding of structure (useful for signatures) */
 595 #define ASN1_AFLG_ENCODING      2
 596 /* The Sequence length is invalid */
 597 #define ASN1_AFLG_BROKEN        4
 598
 599 /* operation values for asn1_cb */
 600
 601 #define ASN1_OP_NEW_PRE         0
 602 #define ASN1_OP_NEW_POST        1
 603 #define ASN1_OP_FREE_PRE        2
 604 #define ASN1_OP_FREE_POST       3
 605 #define ASN1_OP_D2I_PRE         4
 606 #define ASN1_OP_D2I_POST        5
 607 #define ASN1_OP_I2D_PRE         6
 608 #define ASN1_OP_I2D_POST        7
 609
 610 /* Macro to implement a primitive type */
 611 #define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
 612 #define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) const ASN1_ITEM itname##_it = \
 613                                 { ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname};
 614
 615 /* Macro to implement a multi string type */
 616 #define IMPLEMENT_ASN1_MSTRING(itname, mask) const ASN1_ITEM itname##_it = \
 617                                 { ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname};
 618
 619 /* Macro to implement an ASN1_ITEM in terms of old style funcs */
 620
 621 #define IMPLEMENT_COMPAT_ASN1(sname) IMPLEMENT_COMPAT_ASN1_type(sname, V_ASN1_SEQUENCE)
 622
 623 #define IMPLEMENT_COMPAT_ASN1_type(sname, tag) \
 624         static const ASN1_COMPAT_FUNCS sname##_ff = { \
 625                 (ASN1_new_func *)sname##_new, \
 626                 (ASN1_free_func *)sname##_free, \
 627                 (ASN1_d2i_func *)d2i_##sname, \
 628                 (ASN1_i2d_func *)i2d_##sname, \
 629         }; \
 630         ASN1_ITEM const sname##_it = { \
 631                 ASN1_ITYPE_COMPAT, \
 632                 tag, \
 633                 NULL, \
 634                 0, \
 635                 &sname##_ff, \
 636                 0, \
 637                 #sname \
 638         }
 639
 640 #define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
 641         const ASN1_ITEM sname##_it = { \
 642                 ASN1_ITYPE_EXTERN, \
 643                 tag, \
 644                 NULL, \
 645                 0, \
 646                 &fptrs, \
 647                 0, \
 648                 #sname \
 649         };
 650
 651 /* Macro to implement standard functions in terms of ASN1_ITEM structures */
 652
 653 #define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
 654
 655 #define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
 656
 657 #define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
 658                         IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
 659
 660 #define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
 661         stname *fname##_new(void) \
 662         { \
 663                 return (stname *)ASN1_item_new(&itname##_it); \
 664         } \
 665         void fname##_free(stname *a) \
 666         { \
 667                 ASN1_item_free((ASN1_VALUE *)a, &itname##_it); \
 668         }
 669
 670 #define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
 671         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
 672         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
 673
 674 #define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
 675         stname *d2i_##fname(stname **a, unsigned char **in, long len) \
 676         { \
 677                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, &itname##_it);\
 678         } \
 679         int i2d_##fname(stname *a, unsigned char **out) \
 680         { \
 681                 return ASN1_item_i2d((ASN1_VALUE *)a, out, &itname##_it);\
 682         }
 683
 684 /* This includes evil casts to remove const: they will go away when full
 685  * ASN1 constification is done.
 686  */
 687 #define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
 688         stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
 689         { \
 690                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, (unsigned char **)in, len, &itname##_it);\
 691         } \
 692         int i2d_##fname(const stname *a, unsigned char **out) \
 693         { \
 694                 return ASN1_item_i2d((ASN1_VALUE *)a, out, &itname##_it);\
 695         }
 696
 697 #define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
 698                 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
 699
 700 #define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
 701         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
 702         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
 703
 704 /* external definitions for primitive types */
 705
 706 extern const ASN1_ITEM ASN1_BOOLEAN_it;
 707 extern const ASN1_ITEM ASN1_TBOOLEAN_it;
 708 extern const ASN1_ITEM ASN1_FBOOLEAN_it;
 709 extern const ASN1_ITEM ASN1_OBJECT_it;
 710 extern const ASN1_ITEM ASN1_ANY_it;
 711 extern const ASN1_ITEM ASN1_SEQUENCE_it;
 712 extern const ASN1_ITEM CBIGNUM_it;
 713 extern const ASN1_ITEM BIGNUM_it;
 714 extern const ASN1_ITEM LONG_it;
 715 extern const ASN1_ITEM ZLONG_it;
 716
 717 DECLARE_STACK_OF(ASN1_VALUE)
 718
 719 /* Functions used internally by the ASN1 code */
 720
 721 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
 722 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 723 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
 724 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
 725
 726 void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
 727 int ASN1_template_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_TEMPLATE *tt);
 728 int ASN1_item_ex_d2i(ASN1_VALUE **pval, unsigned char **in, long len, const ASN1_ITEM *it,
 729                                 int tag, int aclass, char opt, ASN1_TLC *ctx);
 730
 731 int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
 732 int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt);
 733 void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 734
 735 int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
 736 int asn1_ex_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
 737
 738 int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it);
 739 int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it);
 740
 741 ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
 742
 743 const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr);
 744
 745 int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it);
 746
 747 void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it);
 748 void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
 749 int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it);
 750 int asn1_enc_save(ASN1_VALUE **pval, unsigned char *in, int inlen, const ASN1_ITEM *it);
 751
 752 #ifdef  __cplusplus
 753 }
 754 #endif
 755 #endif