1/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 2 * project 2000. 3 */ 4/* ==================================================================== 5 * Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 19 * 3. All advertising materials mentioning features or use of this 20 * software must display the following acknowledgment: 21 * "This product includes software developed by the OpenSSL Project 22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 23 * 24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 25 * endorse or promote products derived from this software without 26 * prior written permission. For written permission, please contact 27 * licensing@OpenSSL.org. 28 * 29 * 5. Products derived from this software may not be called "OpenSSL" 30 * nor may "OpenSSL" appear in their names without prior written 31 * permission of the OpenSSL Project. 32 * 33 * 6. Redistributions of any form whatsoever must retain the following 34 * acknowledgment: 35 * "This product includes software developed by the OpenSSL Project 36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 37 * 38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 49 * OF THE POSSIBILITY OF SUCH DAMAGE. 50 * ==================================================================== 51 * 52 * This product includes cryptographic software written by Eric Young 53 * (eay@cryptsoft.com). This product includes software written by Tim 54 * Hudson (tjh@cryptsoft.com). 55 * 56 */ 57#ifndef HEADER_ASN1T_H 58#define HEADER_ASN1T_H 59 60#include <openssl/base.h> 61#include <openssl/asn1.h> 62 63#ifdef OPENSSL_BUILD_SHLIBCRYPTO 64# undef OPENSSL_EXTERN 65# define OPENSSL_EXTERN OPENSSL_EXPORT 66#endif 67 68/* ASN1 template defines, structures and functions */ 69 70#ifdef __cplusplus 71extern "C" { 72#endif 73 74 75/* Macro to obtain ASN1_ADB pointer from a type (only used internally) */ 76#define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr)) 77 78 79/* Macros for start and end of ASN1_ITEM definition */ 80 81#define ASN1_ITEM_start(itname) \ 82 const ASN1_ITEM itname##_it = { 83 84#define ASN1_ITEM_end(itname) \ 85 }; 86 87/* Macros to aid ASN1 template writing */ 88 89#define ASN1_ITEM_TEMPLATE(tname) \ 90 static const ASN1_TEMPLATE tname##_item_tt 91 92#define ASN1_ITEM_TEMPLATE_END(tname) \ 93 ;\ 94 ASN1_ITEM_start(tname) \ 95 ASN1_ITYPE_PRIMITIVE,\ 96 -1,\ 97 &tname##_item_tt,\ 98 0,\ 99 NULL,\ 100 0,\ 101 #tname \ 102 ASN1_ITEM_end(tname) 103 104 105/* This is a ASN1 type which just embeds a template */ 106 107/* This pair helps declare a SEQUENCE. We can do: 108 * 109 * ASN1_SEQUENCE(stname) = { 110 * ... SEQUENCE components ... 111 * } ASN1_SEQUENCE_END(stname) 112 * 113 * This will produce an ASN1_ITEM called stname_it 114 * for a structure called stname. 115 * 116 * If you want the same structure but a different 117 * name then use: 118 * 119 * ASN1_SEQUENCE(itname) = { 120 * ... SEQUENCE components ... 121 * } ASN1_SEQUENCE_END_name(stname, itname) 122 * 123 * This will create an item called itname_it using 124 * a structure called stname. 125 */ 126 127#define ASN1_SEQUENCE(tname) \ 128 static const ASN1_TEMPLATE tname##_seq_tt[] 129 130#define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname) 131 132#define ASN1_SEQUENCE_END_name(stname, tname) \ 133 ;\ 134 ASN1_ITEM_start(tname) \ 135 ASN1_ITYPE_SEQUENCE,\ 136 V_ASN1_SEQUENCE,\ 137 tname##_seq_tt,\ 138 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\ 139 NULL,\ 140 sizeof(stname),\ 141 #stname \ 142 ASN1_ITEM_end(tname) 143 144#define ASN1_NDEF_SEQUENCE(tname) \ 145 ASN1_SEQUENCE(tname) 146 147#define ASN1_NDEF_SEQUENCE_cb(tname, cb) \ 148 ASN1_SEQUENCE_cb(tname, cb) 149 150#define ASN1_SEQUENCE_cb(tname, cb) \ 151 static const ASN1_AUX tname##_aux = {NULL, 0, 0, cb, 0}; \ 152 ASN1_SEQUENCE(tname) 153 154#define ASN1_BROKEN_SEQUENCE(tname) \ 155 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0}; \ 156 ASN1_SEQUENCE(tname) 157 158#define ASN1_SEQUENCE_ref(tname, cb) \ 159 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), cb, 0}; \ 160 ASN1_SEQUENCE(tname) 161 162#define ASN1_SEQUENCE_enc(tname, enc, cb) \ 163 static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, cb, offsetof(tname, enc)}; \ 164 ASN1_SEQUENCE(tname) 165 166#define ASN1_NDEF_SEQUENCE_END(tname) \ 167 ;\ 168 ASN1_ITEM_start(tname) \ 169 ASN1_ITYPE_NDEF_SEQUENCE,\ 170 V_ASN1_SEQUENCE,\ 171 tname##_seq_tt,\ 172 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\ 173 NULL,\ 174 sizeof(tname),\ 175 #tname \ 176 ASN1_ITEM_end(tname) 177 178#define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname) 179 180#define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname) 181 182#define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname) 183 184#define ASN1_SEQUENCE_END_ref(stname, tname) \ 185 ;\ 186 ASN1_ITEM_start(tname) \ 187 ASN1_ITYPE_SEQUENCE,\ 188 V_ASN1_SEQUENCE,\ 189 tname##_seq_tt,\ 190 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\ 191 &tname##_aux,\ 192 sizeof(stname),\ 193 #stname \ 194 ASN1_ITEM_end(tname) 195 196#define ASN1_NDEF_SEQUENCE_END_cb(stname, tname) \ 197 ;\ 198 ASN1_ITEM_start(tname) \ 199 ASN1_ITYPE_NDEF_SEQUENCE,\ 200 V_ASN1_SEQUENCE,\ 201 tname##_seq_tt,\ 202 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\ 203 &tname##_aux,\ 204 sizeof(stname),\ 205 #stname \ 206 ASN1_ITEM_end(tname) 207 208 209/* This pair helps declare a CHOICE type. We can do: 210 * 211 * ASN1_CHOICE(chname) = { 212 * ... CHOICE options ... 213 * ASN1_CHOICE_END(chname) 214 * 215 * This will produce an ASN1_ITEM called chname_it 216 * for a structure called chname. The structure 217 * definition must look like this: 218 * typedef struct { 219 * int type; 220 * union { 221 * ASN1_SOMETHING *opt1; 222 * ASN1_SOMEOTHER *opt2; 223 * } value; 224 * } chname; 225 * 226 * the name of the selector must be 'type'. 227 * to use an alternative selector name use the 228 * ASN1_CHOICE_END_selector() version. 229 */ 230 231#define ASN1_CHOICE(tname) \ 232 static const ASN1_TEMPLATE tname##_ch_tt[] 233 234#define ASN1_CHOICE_cb(tname, cb) \ 235 static const ASN1_AUX tname##_aux = {NULL, 0, 0, cb, 0}; \ 236 ASN1_CHOICE(tname) 237 238#define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname) 239 240#define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type) 241 242#define ASN1_CHOICE_END_selector(stname, tname, selname) \ 243 ;\ 244 ASN1_ITEM_start(tname) \ 245 ASN1_ITYPE_CHOICE,\ 246 offsetof(stname,selname) ,\ 247 tname##_ch_tt,\ 248 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\ 249 NULL,\ 250 sizeof(stname),\ 251 #stname \ 252 ASN1_ITEM_end(tname) 253 254#define ASN1_CHOICE_END_cb(stname, tname, selname) \ 255 ;\ 256 ASN1_ITEM_start(tname) \ 257 ASN1_ITYPE_CHOICE,\ 258 offsetof(stname,selname) ,\ 259 tname##_ch_tt,\ 260 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\ 261 &tname##_aux,\ 262 sizeof(stname),\ 263 #stname \ 264 ASN1_ITEM_end(tname) 265 266/* This helps with the template wrapper form of ASN1_ITEM */ 267 268#define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \ 269 (flags), (tag), 0,\ 270 #name, ASN1_ITEM_ref(type) } 271 272/* These help with SEQUENCE or CHOICE components */ 273 274/* used to declare other types */ 275 276#define ASN1_EX_TYPE(flags, tag, stname, field, type) { \ 277 (flags), (tag), offsetof(stname, field),\ 278 #field, ASN1_ITEM_ref(type) } 279 280/* used when the structure is combined with the parent */ 281 282#define ASN1_EX_COMBINE(flags, tag, type) { \ 283 (flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) } 284 285/* implicit and explicit helper macros */ 286 287#define ASN1_IMP_EX(stname, field, type, tag, ex) \ 288 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type) 289 290#define ASN1_EXP_EX(stname, field, type, tag, ex) \ 291 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type) 292 293/* Any defined by macros: the field used is in the table itself */ 294 295#define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) } 296#define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) } 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/* EXPLICIT using indefinite length constructed form */ 357#define ASN1_NDEF_EXP(stname, field, type, tag) \ 358 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF) 359 360/* EXPLICIT OPTIONAL using indefinite length constructed form */ 361#define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \ 362 ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF) 363 364/* Macros for the ASN1_ADB structure */ 365 366#define ASN1_ADB(name) \ 367 static const ASN1_ADB_TABLE name##_adbtbl[] 368 369#define ASN1_ADB_END(name, flags, field, app_table, def, none) \ 370 ;\ 371 static const ASN1_ADB name##_adb = {\ 372 flags,\ 373 offsetof(name, field),\ 374 app_table,\ 375 name##_adbtbl,\ 376 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\ 377 def,\ 378 none\ 379 } 380 381#define ADB_ENTRY(val, template) {val, template} 382 383#define ASN1_ADB_TEMPLATE(name) \ 384 static const ASN1_TEMPLATE name##_tt 385 386/* This is the ASN1 template structure that defines 387 * a wrapper round the actual type. It determines the 388 * actual position of the field in the value structure, 389 * various flags such as OPTIONAL and the field name. 390 */ 391 392struct ASN1_TEMPLATE_st { 393unsigned long flags; /* Various flags */ 394long tag; /* tag, not used if no tagging */ 395unsigned long offset; /* Offset of this field in structure */ 396#ifndef NO_ASN1_FIELD_NAMES 397const char *field_name; /* Field name */ 398#endif 399ASN1_ITEM_EXP *item; /* Relevant ASN1_ITEM or ASN1_ADB */ 400}; 401 402/* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */ 403 404#define ASN1_TEMPLATE_item(t) (t->item_ptr) 405#define ASN1_TEMPLATE_adb(t) (t->item_ptr) 406 407typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE; 408typedef struct ASN1_ADB_st ASN1_ADB; 409 410struct ASN1_ADB_st { 411 unsigned long flags; /* Various flags */ 412 unsigned long offset; /* Offset of selector field */ 413 STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */ 414 const ASN1_ADB_TABLE *tbl; /* Table of possible types */ 415 long tblcount; /* Number of entries in tbl */ 416 const ASN1_TEMPLATE *default_tt; /* Type to use if no match */ 417 const ASN1_TEMPLATE *null_tt; /* Type to use if selector is NULL */ 418}; 419 420struct ASN1_ADB_TABLE_st { 421 long value; /* NID for an object or value for an int */ 422 const ASN1_TEMPLATE tt; /* item for this value */ 423}; 424 425/* template flags */ 426 427/* Field is optional */ 428#define ASN1_TFLG_OPTIONAL (0x1) 429 430/* Field is a SET OF */ 431#define ASN1_TFLG_SET_OF (0x1 << 1) 432 433/* Field is a SEQUENCE OF */ 434#define ASN1_TFLG_SEQUENCE_OF (0x2 << 1) 435 436/* Special case: this refers to a SET OF that 437 * will be sorted into DER order when encoded *and* 438 * the corresponding STACK will be modified to match 439 * the new order. 440 */ 441#define ASN1_TFLG_SET_ORDER (0x3 << 1) 442 443/* Mask for SET OF or SEQUENCE OF */ 444#define ASN1_TFLG_SK_MASK (0x3 << 1) 445 446/* These flags mean the tag should be taken from the 447 * tag field. If EXPLICIT then the underlying type 448 * is used for the inner tag. 449 */ 450 451/* IMPLICIT tagging */ 452#define ASN1_TFLG_IMPTAG (0x1 << 3) 453 454 455/* EXPLICIT tagging, inner tag from underlying type */ 456#define ASN1_TFLG_EXPTAG (0x2 << 3) 457 458#define ASN1_TFLG_TAG_MASK (0x3 << 3) 459 460/* context specific IMPLICIT */ 461#define ASN1_TFLG_IMPLICIT ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT 462 463/* context specific EXPLICIT */ 464#define ASN1_TFLG_EXPLICIT ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT 465 466/* If tagging is in force these determine the 467 * type of tag to use. Otherwise the tag is 468 * determined by the underlying type. These 469 * values reflect the actual octet format. 470 */ 471 472/* Universal tag */ 473#define ASN1_TFLG_UNIVERSAL (0x0<<6) 474/* Application tag */ 475#define ASN1_TFLG_APPLICATION (0x1<<6) 476/* Context specific tag */ 477#define ASN1_TFLG_CONTEXT (0x2<<6) 478/* Private tag */ 479#define ASN1_TFLG_PRIVATE (0x3<<6) 480 481#define ASN1_TFLG_TAG_CLASS (0x3<<6) 482 483/* These are for ANY DEFINED BY type. In this case 484 * the 'item' field points to an ASN1_ADB structure 485 * which contains a table of values to decode the 486 * relevant type 487 */ 488 489#define ASN1_TFLG_ADB_MASK (0x3<<8) 490 491#define ASN1_TFLG_ADB_OID (0x1<<8) 492 493#define ASN1_TFLG_ADB_INT (0x1<<9) 494 495/* This flag means a parent structure is passed 496 * instead of the field: this is useful is a 497 * SEQUENCE is being combined with a CHOICE for 498 * example. Since this means the structure and 499 * item name will differ we need to use the 500 * ASN1_CHOICE_END_name() macro for example. 501 */ 502 503#define ASN1_TFLG_COMBINE (0x1<<10) 504 505/* This flag when present in a SEQUENCE OF, SET OF 506 * or EXPLICIT causes indefinite length constructed 507 * encoding to be used if required. 508 */ 509 510#define ASN1_TFLG_NDEF (0x1<<11) 511 512/* This is the actual ASN1 item itself */ 513 514struct ASN1_ITEM_st { 515char itype; /* The item type, primitive, SEQUENCE, CHOICE or extern */ 516long utype; /* underlying type */ 517const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains the contents */ 518long tcount; /* Number of templates if SEQUENCE or CHOICE */ 519const void *funcs; /* functions that handle this type */ 520long size; /* Structure size (usually)*/ 521#ifndef NO_ASN1_FIELD_NAMES 522const char *sname; /* Structure name */ 523#endif 524}; 525 526/* These are values for the itype field and 527 * determine how the type is interpreted. 528 * 529 * For PRIMITIVE types the underlying type 530 * determines the behaviour if items is NULL. 531 * 532 * Otherwise templates must contain a single 533 * template and the type is treated in the 534 * same way as the type specified in the template. 535 * 536 * For SEQUENCE types the templates field points 537 * to the members, the size field is the 538 * structure size. 539 * 540 * For CHOICE types the templates field points 541 * to each possible member (typically a union) 542 * and the 'size' field is the offset of the 543 * selector. 544 * 545 * The 'funcs' field is used for application 546 * specific functions. 547 * 548 * For COMPAT types the funcs field gives a 549 * set of functions that handle this type, this 550 * supports the old d2i, i2d convention. 551 * 552 * The EXTERN type uses a new style d2i/i2d. 553 * The new style should be used where possible 554 * because it avoids things like the d2i IMPLICIT 555 * hack. 556 * 557 * MSTRING is a multiple string type, it is used 558 * for a CHOICE of character strings where the 559 * actual strings all occupy an ASN1_STRING 560 * structure. In this case the 'utype' field 561 * has a special meaning, it is used as a mask 562 * of acceptable types using the B_ASN1 constants. 563 * 564 * NDEF_SEQUENCE is the same as SEQUENCE except 565 * that it will use indefinite length constructed 566 * encoding if requested. 567 * 568 */ 569 570#define ASN1_ITYPE_PRIMITIVE 0x0 571 572#define ASN1_ITYPE_SEQUENCE 0x1 573 574#define ASN1_ITYPE_CHOICE 0x2 575 576#define ASN1_ITYPE_COMPAT 0x3 577 578#define ASN1_ITYPE_EXTERN 0x4 579 580#define ASN1_ITYPE_MSTRING 0x5 581 582#define ASN1_ITYPE_NDEF_SEQUENCE 0x6 583 584/* Cache for ASN1 tag and length, so we 585 * don't keep re-reading it for things 586 * like CHOICE 587 */ 588 589struct ASN1_TLC_st{ 590 char valid; /* Values below are valid */ 591 int ret; /* return value */ 592 long plen; /* length */ 593 int ptag; /* class value */ 594 int pclass; /* class value */ 595 int hdrlen; /* header length */ 596}; 597 598/* Typedefs for ASN1 function pointers */ 599 600typedef ASN1_VALUE * ASN1_new_func(void); 601typedef void ASN1_free_func(ASN1_VALUE *a); 602typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, const unsigned char ** in, long length); 603typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in); 604 605typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it, 606 int tag, int aclass, char opt, ASN1_TLC *ctx); 607 608typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass); 609typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it); 610typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it); 611 612typedef int ASN1_ex_print_func(BIO *out, ASN1_VALUE **pval, 613 int indent, const char *fname, 614 const ASN1_PCTX *pctx); 615 616typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it); 617typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it); 618typedef int ASN1_primitive_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent, const ASN1_PCTX *pctx); 619 620typedef struct ASN1_COMPAT_FUNCS_st { 621 ASN1_new_func *asn1_new; 622 ASN1_free_func *asn1_free; 623 ASN1_d2i_func *asn1_d2i; 624 ASN1_i2d_func *asn1_i2d; 625} ASN1_COMPAT_FUNCS; 626 627typedef struct ASN1_EXTERN_FUNCS_st { 628 void *app_data; 629 ASN1_ex_new_func *asn1_ex_new; 630 ASN1_ex_free_func *asn1_ex_free; 631 ASN1_ex_free_func *asn1_ex_clear; 632 ASN1_ex_d2i *asn1_ex_d2i; 633 ASN1_ex_i2d *asn1_ex_i2d; 634 ASN1_ex_print_func *asn1_ex_print; 635} ASN1_EXTERN_FUNCS; 636 637typedef struct ASN1_PRIMITIVE_FUNCS_st { 638 void *app_data; 639 unsigned long flags; 640 ASN1_ex_new_func *prim_new; 641 ASN1_ex_free_func *prim_free; 642 ASN1_ex_free_func *prim_clear; 643 ASN1_primitive_c2i *prim_c2i; 644 ASN1_primitive_i2c *prim_i2c; 645 ASN1_primitive_print *prim_print; 646} ASN1_PRIMITIVE_FUNCS; 647 648/* This is the ASN1_AUX structure: it handles various 649 * miscellaneous requirements. For example the use of 650 * reference counts and an informational callback. 651 * 652 * The "informational callback" is called at various 653 * points during the ASN1 encoding and decoding. It can 654 * be used to provide minor customisation of the structures 655 * used. This is most useful where the supplied routines 656 * *almost* do the right thing but need some extra help 657 * at a few points. If the callback returns zero then 658 * it is assumed a fatal error has occurred and the 659 * main operation should be abandoned. 660 * 661 * If major changes in the default behaviour are required 662 * then an external type is more appropriate. 663 */ 664 665typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it, 666 void *exarg); 667 668typedef struct ASN1_AUX_st { 669 void *app_data; 670 int flags; 671 int ref_offset; /* Offset of reference value */ 672 ASN1_aux_cb *asn1_cb; 673 int enc_offset; /* Offset of ASN1_ENCODING structure */ 674} ASN1_AUX; 675 676/* For print related callbacks exarg points to this structure */ 677typedef struct ASN1_PRINT_ARG_st { 678 BIO *out; 679 int indent; 680 const ASN1_PCTX *pctx; 681} ASN1_PRINT_ARG; 682 683/* For streaming related callbacks exarg points to this structure */ 684typedef struct ASN1_STREAM_ARG_st { 685 /* BIO to stream through */ 686 BIO *out; 687 /* BIO with filters appended */ 688 BIO *ndef_bio; 689 /* Streaming I/O boundary */ 690 unsigned char **boundary; 691} ASN1_STREAM_ARG; 692 693/* Flags in ASN1_AUX */ 694 695/* Use a reference count */ 696#define ASN1_AFLG_REFCOUNT 1 697/* Save the encoding of structure (useful for signatures) */ 698#define ASN1_AFLG_ENCODING 2 699/* The Sequence length is invalid */ 700#define ASN1_AFLG_BROKEN 4 701 702/* operation values for asn1_cb */ 703 704#define ASN1_OP_NEW_PRE 0 705#define ASN1_OP_NEW_POST 1 706#define ASN1_OP_FREE_PRE 2 707#define ASN1_OP_FREE_POST 3 708#define ASN1_OP_D2I_PRE 4 709#define ASN1_OP_D2I_POST 5 710#define ASN1_OP_I2D_PRE 6 711#define ASN1_OP_I2D_POST 7 712#define ASN1_OP_PRINT_PRE 8 713#define ASN1_OP_PRINT_POST 9 714#define ASN1_OP_STREAM_PRE 10 715#define ASN1_OP_STREAM_POST 11 716#define ASN1_OP_DETACHED_PRE 12 717#define ASN1_OP_DETACHED_POST 13 718 719/* Macro to implement a primitive type */ 720#define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0) 721#define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \ 722 ASN1_ITEM_start(itname) \ 723 ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \ 724 ASN1_ITEM_end(itname) 725 726/* Macro to implement a multi string type */ 727#define IMPLEMENT_ASN1_MSTRING(itname, mask) \ 728 ASN1_ITEM_start(itname) \ 729 ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \ 730 ASN1_ITEM_end(itname) 731 732/* Macro to implement an ASN1_ITEM in terms of old style funcs */ 733 734#define IMPLEMENT_COMPAT_ASN1(sname) IMPLEMENT_COMPAT_ASN1_type(sname, V_ASN1_SEQUENCE) 735 736#define IMPLEMENT_COMPAT_ASN1_type(sname, tag) \ 737 static const ASN1_COMPAT_FUNCS sname##_ff = { \ 738 (ASN1_new_func *)sname##_new, \ 739 (ASN1_free_func *)sname##_free, \ 740 (ASN1_d2i_func *)d2i_##sname, \ 741 (ASN1_i2d_func *)i2d_##sname, \ 742 }; \ 743 ASN1_ITEM_start(sname) \ 744 ASN1_ITYPE_COMPAT, \ 745 tag, \ 746 NULL, \ 747 0, \ 748 &sname##_ff, \ 749 0, \ 750 #sname \ 751 ASN1_ITEM_end(sname) 752 753#define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \ 754 ASN1_ITEM_start(sname) \ 755 ASN1_ITYPE_EXTERN, \ 756 tag, \ 757 NULL, \ 758 0, \ 759 &fptrs, \ 760 0, \ 761 #sname \ 762 ASN1_ITEM_end(sname) 763 764/* Macro to implement standard functions in terms of ASN1_ITEM structures */ 765 766#define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname) 767 768#define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname) 769 770#define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \ 771 IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname) 772 773#define IMPLEMENT_STATIC_ASN1_ALLOC_FUNCTIONS(stname) \ 774 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(static, stname, stname, stname) 775 776#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \ 777 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname) 778 779#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_pfname(pre, stname, itname, fname) \ 780 pre stname *fname##_new(void) \ 781 { \ 782 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \ 783 } \ 784 pre void fname##_free(stname *a) \ 785 { \ 786 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \ 787 } 788 789#define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \ 790 stname *fname##_new(void) \ 791 { \ 792 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \ 793 } \ 794 void fname##_free(stname *a) \ 795 { \ 796 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \ 797 } 798 799#define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \ 800 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \ 801 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) 802 803#define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \ 804 stname *d2i_##fname(stname **a, const unsigned char **in, long len) \ 805 { \ 806 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\ 807 } \ 808 int i2d_##fname(stname *a, unsigned char **out) \ 809 { \ 810 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\ 811 } 812 813#define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \ 814 int i2d_##stname##_NDEF(stname *a, unsigned char **out) \ 815 { \ 816 return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\ 817 } 818 819/* This includes evil casts to remove const: they will go away when full 820 * ASN1 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_PRINT_FUNCTION(stname) \ 839 IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, stname, stname) 840 841#define IMPLEMENT_ASN1_PRINT_FUNCTION_fname(stname, itname, fname) \ 842 int fname##_print_ctx(BIO *out, stname *x, int indent, \ 843 const ASN1_PCTX *pctx) \ 844 { \ 845 return ASN1_item_print(out, (ASN1_VALUE *)x, indent, \ 846 ASN1_ITEM_rptr(itname), pctx); \ 847 } 848 849#define IMPLEMENT_ASN1_FUNCTIONS_const(name) \ 850 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name) 851 852#define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \ 853 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \ 854 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) 855 856/* external definitions for primitive types */ 857 858DECLARE_ASN1_ITEM(ASN1_BOOLEAN) 859DECLARE_ASN1_ITEM(ASN1_TBOOLEAN) 860DECLARE_ASN1_ITEM(ASN1_FBOOLEAN) 861DECLARE_ASN1_ITEM(ASN1_SEQUENCE) 862DECLARE_ASN1_ITEM(CBIGNUM) 863DECLARE_ASN1_ITEM(BIGNUM) 864DECLARE_ASN1_ITEM(LONG) 865DECLARE_ASN1_ITEM(ZLONG) 866 867DECLARE_STACK_OF(ASN1_VALUE) 868 869/* Functions used internally by the ASN1 code */ 870 871int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it); 872void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it); 873int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt); 874int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it); 875 876void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt); 877int ASN1_template_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_TEMPLATE *tt); 878int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it, 879 int tag, int aclass, char opt, ASN1_TLC *ctx); 880 881int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass); 882int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt); 883void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it); 884 885int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it); 886int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it); 887 888int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it); 889int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it); 890 891ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt); 892 893const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr); 894 895void asn1_refcount_set_one(ASN1_VALUE **pval, const ASN1_ITEM *it); 896int asn1_refcount_dec_and_test_zero(ASN1_VALUE **pval, const ASN1_ITEM *it); 897 898void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it); 899void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it); 900int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it); 901int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, const ASN1_ITEM *it); 902 903#ifdef __cplusplus 904} 905#endif 906#endif 907