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src/libdigidoc/openssl/crypto/asn1/asn1t.h
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00001 /* asn1t.h */
00002 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
00003  * project 2000.
00004  */
00005 /* ====================================================================
00006  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
00007  *
00008  * Redistribution and use in source and binary forms, with or without
00009  * modification, are permitted provided that the following conditions
00010  * are met:
00011  *
00012  * 1. Redistributions of source code must retain the above copyright
00013  *    notice, this list of conditions and the following disclaimer. 
00014  *
00015  * 2. Redistributions in binary form must reproduce the above copyright
00016  *    notice, this list of conditions and the following disclaimer in
00017  *    the documentation and/or other materials provided with the
00018  *    distribution.
00019  *
00020  * 3. All advertising materials mentioning features or use of this
00021  *    software must display the following acknowledgment:
00022  *    "This product includes software developed by the OpenSSL Project
00023  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
00024  *
00025  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
00026  *    endorse or promote products derived from this software without
00027  *    prior written permission. For written permission, please contact
00028  *    licensing@OpenSSL.org.
00029  *
00030  * 5. Products derived from this software may not be called "OpenSSL"
00031  *    nor may "OpenSSL" appear in their names without prior written
00032  *    permission of the OpenSSL Project.
00033  *
00034  * 6. Redistributions of any form whatsoever must retain the following
00035  *    acknowledgment:
00036  *    "This product includes software developed by the OpenSSL Project
00037  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
00038  *
00039  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
00040  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00041  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
00042  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
00043  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00044  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00045  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
00046  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00047  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
00048  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00049  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
00050  * OF THE POSSIBILITY OF SUCH DAMAGE.
00051  * ====================================================================
00052  *
00053  * This product includes cryptographic software written by Eric Young
00054  * (eay@cryptsoft.com).  This product includes software written by Tim
00055  * Hudson (tjh@cryptsoft.com).
00056  *
00057  */
00058 #ifndef HEADER_ASN1T_H
00059 #define HEADER_ASN1T_H
00060 
00061 #include <stddef.h>
00062 #include <openssl/e_os2.h>
00063 #include <openssl/asn1.h>
00064 
00065 #ifdef OPENSSL_BUILD_SHLIBCRYPTO
00066 # undef OPENSSL_EXTERN
00067 # define OPENSSL_EXTERN OPENSSL_EXPORT
00068 #endif
00069 
00070 /* ASN1 template defines, structures and functions */
00071 
00072 #ifdef  __cplusplus
00073 extern "C" {
00074 #endif
00075 
00076 
00077 #ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
00078 
00079 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
00080 #define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr))
00081 
00082 
00083 /* Macros for start and end of ASN1_ITEM definition */
00084 
00085 #define ASN1_ITEM_start(itname) \
00086         OPENSSL_GLOBAL const ASN1_ITEM itname##_it = {
00087 
00088 #define ASN1_ITEM_end(itname) \
00089                 };
00090 
00091 #else
00092 
00093 /* Macro to obtain ASN1_ADB pointer from a type (only used internally) */
00094 #define ASN1_ADB_ptr(iptr) ((const ASN1_ADB *)(iptr()))
00095 
00096 
00097 /* Macros for start and end of ASN1_ITEM definition */
00098 
00099 #define ASN1_ITEM_start(itname) \
00100         const ASN1_ITEM * itname##_it(void) \
00101         { \
00102                 static const ASN1_ITEM local_it = { 
00103 
00104 #define ASN1_ITEM_end(itname) \
00105                 }; \
00106         return &local_it; \
00107         }
00108 
00109 #endif
00110 
00111 
00112 /* Macros to aid ASN1 template writing */
00113 
00114 #define ASN1_ITEM_TEMPLATE(tname) \
00115         static const ASN1_TEMPLATE tname##_item_tt 
00116 
00117 #define ASN1_ITEM_TEMPLATE_END(tname) \
00118         ;\
00119         ASN1_ITEM_start(tname) \
00120                 ASN1_ITYPE_PRIMITIVE,\
00121                 -1,\
00122                 &tname##_item_tt,\
00123                 0,\
00124                 NULL,\
00125                 0,\
00126                 #tname \
00127         ASN1_ITEM_end(tname)
00128 
00129 
00130 /* This is a ASN1 type which just embeds a template */
00131  
00132 /* This pair helps declare a SEQUENCE. We can do:
00133  *
00134  *      ASN1_SEQUENCE(stname) = {
00135  *              ... SEQUENCE components ...
00136  *      } ASN1_SEQUENCE_END(stname)
00137  *
00138  *      This will produce an ASN1_ITEM called stname_it
00139  *      for a structure called stname.
00140  *
00141  *      If you want the same structure but a different
00142  *      name then use:
00143  *
00144  *      ASN1_SEQUENCE(itname) = {
00145  *              ... SEQUENCE components ...
00146  *      } ASN1_SEQUENCE_END_name(stname, itname)
00147  *
00148  *      This will create an item called itname_it using
00149  *      a structure called stname.
00150  */
00151 
00152 #define ASN1_SEQUENCE(tname) \
00153         static const ASN1_TEMPLATE tname##_seq_tt[] 
00154 
00155 #define ASN1_SEQUENCE_END(stname) ASN1_SEQUENCE_END_name(stname, stname)
00156 
00157 #define ASN1_SEQUENCE_END_name(stname, tname) \
00158         ;\
00159         ASN1_ITEM_start(tname) \
00160                 ASN1_ITYPE_SEQUENCE,\
00161                 V_ASN1_SEQUENCE,\
00162                 tname##_seq_tt,\
00163                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
00164                 NULL,\
00165                 sizeof(stname),\
00166                 #stname \
00167         ASN1_ITEM_end(tname)
00168 
00169 #define ASN1_NDEF_SEQUENCE(tname) \
00170         ASN1_SEQUENCE(tname)
00171 
00172 #define ASN1_NDEF_SEQUENCE_cb(tname, cb) \
00173         ASN1_SEQUENCE_cb(tname, cb)
00174 
00175 #define ASN1_SEQUENCE_cb(tname, cb) \
00176         static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
00177         ASN1_SEQUENCE(tname)
00178 
00179 #define ASN1_BROKEN_SEQUENCE(tname) \
00180         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_BROKEN, 0, 0, 0, 0}; \
00181         ASN1_SEQUENCE(tname)
00182 
00183 #define ASN1_SEQUENCE_ref(tname, cb, lck) \
00184         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_REFCOUNT, offsetof(tname, references), lck, cb, 0}; \
00185         ASN1_SEQUENCE(tname)
00186 
00187 #define ASN1_SEQUENCE_enc(tname, enc, cb) \
00188         static const ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
00189         ASN1_SEQUENCE(tname)
00190 
00191 #define ASN1_NDEF_SEQUENCE_END(tname) \
00192         ;\
00193         ASN1_ITEM_start(tname) \
00194                 ASN1_ITYPE_NDEF_SEQUENCE,\
00195                 V_ASN1_SEQUENCE,\
00196                 tname##_seq_tt,\
00197                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
00198                 NULL,\
00199                 sizeof(tname),\
00200                 #tname \
00201         ASN1_ITEM_end(tname)
00202 
00203 #define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
00204 
00205 #define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
00206 
00207 #define ASN1_SEQUENCE_END_cb(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
00208 
00209 #define ASN1_SEQUENCE_END_ref(stname, tname) \
00210         ;\
00211         ASN1_ITEM_start(tname) \
00212                 ASN1_ITYPE_SEQUENCE,\
00213                 V_ASN1_SEQUENCE,\
00214                 tname##_seq_tt,\
00215                 sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
00216                 &tname##_aux,\
00217                 sizeof(stname),\
00218                 #stname \
00219         ASN1_ITEM_end(tname)
00220 
00221 
00222 /* This pair helps declare a CHOICE type. We can do:
00223  *
00224  *      ASN1_CHOICE(chname) = {
00225  *              ... CHOICE options ...
00226  *      ASN1_CHOICE_END(chname)
00227  *
00228  *      This will produce an ASN1_ITEM called chname_it
00229  *      for a structure called chname. The structure
00230  *      definition must look like this:
00231  *      typedef struct {
00232  *              int type;
00233  *              union {
00234  *                      ASN1_SOMETHING *opt1;
00235  *                      ASN1_SOMEOTHER *opt2;
00236  *              } value;
00237  *      } chname;
00238  *      
00239  *      the name of the selector must be 'type'.
00240  *      to use an alternative selector name use the
00241  *      ASN1_CHOICE_END_selector() version.
00242  */
00243 
00244 #define ASN1_CHOICE(tname) \
00245         static const ASN1_TEMPLATE tname##_ch_tt[] 
00246 
00247 #define ASN1_CHOICE_cb(tname, cb) \
00248         static const ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
00249         ASN1_CHOICE(tname)
00250 
00251 #define ASN1_CHOICE_END(stname) ASN1_CHOICE_END_name(stname, stname)
00252 
00253 #define ASN1_CHOICE_END_name(stname, tname) ASN1_CHOICE_END_selector(stname, tname, type)
00254 
00255 #define ASN1_CHOICE_END_selector(stname, tname, selname) \
00256         ;\
00257         ASN1_ITEM_start(tname) \
00258                 ASN1_ITYPE_CHOICE,\
00259                 offsetof(stname,selname) ,\
00260                 tname##_ch_tt,\
00261                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
00262                 NULL,\
00263                 sizeof(stname),\
00264                 #stname \
00265         ASN1_ITEM_end(tname)
00266 
00267 #define ASN1_CHOICE_END_cb(stname, tname, selname) \
00268         ;\
00269         ASN1_ITEM_start(tname) \
00270                 ASN1_ITYPE_CHOICE,\
00271                 offsetof(stname,selname) ,\
00272                 tname##_ch_tt,\
00273                 sizeof(tname##_ch_tt) / sizeof(ASN1_TEMPLATE),\
00274                 &tname##_aux,\
00275                 sizeof(stname),\
00276                 #stname \
00277         ASN1_ITEM_end(tname)
00278 
00279 /* This helps with the template wrapper form of ASN1_ITEM */
00280 
00281 #define ASN1_EX_TEMPLATE_TYPE(flags, tag, name, type) { \
00282         (flags), (tag), 0,\
00283         #name, ASN1_ITEM_ref(type) }
00284 
00285 /* These help with SEQUENCE or CHOICE components */
00286 
00287 /* used to declare other types */
00288 
00289 #define ASN1_EX_TYPE(flags, tag, stname, field, type) { \
00290         (flags), (tag), offsetof(stname, field),\
00291         #field, ASN1_ITEM_ref(type) }
00292 
00293 /* used when the structure is combined with the parent */
00294 
00295 #define ASN1_EX_COMBINE(flags, tag, type) { \
00296         (flags)|ASN1_TFLG_COMBINE, (tag), 0, NULL, ASN1_ITEM_ref(type) }
00297 
00298 /* implicit and explicit helper macros */
00299 
00300 #define ASN1_IMP_EX(stname, field, type, tag, ex) \
00301                 ASN1_EX_TYPE(ASN1_TFLG_IMPLICIT | ex, tag, stname, field, type)
00302 
00303 #define ASN1_EXP_EX(stname, field, type, tag, ex) \
00304                 ASN1_EX_TYPE(ASN1_TFLG_EXPLICIT | ex, tag, stname, field, type)
00305 
00306 /* Any defined by macros: the field used is in the table itself */
00307 
00308 #ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
00309 #define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
00310 #define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, (const ASN1_ITEM *)&(tblname##_adb) }
00311 #else
00312 #define ASN1_ADB_OBJECT(tblname) { ASN1_TFLG_ADB_OID, -1, 0, #tblname, tblname##_adb }
00313 #define ASN1_ADB_INTEGER(tblname) { ASN1_TFLG_ADB_INT, -1, 0, #tblname, tblname##_adb }
00314 #endif
00315 /* Plain simple type */
00316 #define ASN1_SIMPLE(stname, field, type) ASN1_EX_TYPE(0,0, stname, field, type)
00317 
00318 /* OPTIONAL simple type */
00319 #define ASN1_OPT(stname, field, type) ASN1_EX_TYPE(ASN1_TFLG_OPTIONAL, 0, stname, field, type)
00320 
00321 /* IMPLICIT tagged simple type */
00322 #define ASN1_IMP(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, 0)
00323 
00324 /* IMPLICIT tagged OPTIONAL simple type */
00325 #define ASN1_IMP_OPT(stname, field, type, tag) ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
00326 
00327 /* Same as above but EXPLICIT */
00328 
00329 #define ASN1_EXP(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, 0)
00330 #define ASN1_EXP_OPT(stname, field, type, tag) ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL)
00331 
00332 /* SEQUENCE OF type */
00333 #define ASN1_SEQUENCE_OF(stname, field, type) \
00334                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, stname, field, type)
00335 
00336 /* OPTIONAL SEQUENCE OF */
00337 #define ASN1_SEQUENCE_OF_OPT(stname, field, type) \
00338                 ASN1_EX_TYPE(ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
00339 
00340 /* Same as above but for SET OF */
00341 
00342 #define ASN1_SET_OF(stname, field, type) \
00343                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF, 0, stname, field, type)
00344 
00345 #define ASN1_SET_OF_OPT(stname, field, type) \
00346                 ASN1_EX_TYPE(ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL, 0, stname, field, type)
00347 
00348 /* Finally compound types of SEQUENCE, SET, IMPLICIT, EXPLICIT and OPTIONAL */
00349 
00350 #define ASN1_IMP_SET_OF(stname, field, type, tag) \
00351                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
00352 
00353 #define ASN1_EXP_SET_OF(stname, field, type, tag) \
00354                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF)
00355 
00356 #define ASN1_IMP_SET_OF_OPT(stname, field, type, tag) \
00357                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
00358 
00359 #define ASN1_EXP_SET_OF_OPT(stname, field, type, tag) \
00360                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SET_OF|ASN1_TFLG_OPTIONAL)
00361 
00362 #define ASN1_IMP_SEQUENCE_OF(stname, field, type, tag) \
00363                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
00364 
00365 #define ASN1_IMP_SEQUENCE_OF_OPT(stname, field, type, tag) \
00366                         ASN1_IMP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
00367 
00368 #define ASN1_EXP_SEQUENCE_OF(stname, field, type, tag) \
00369                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF)
00370 
00371 #define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
00372                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
00373 
00374 /* EXPLICIT using indefinite length constructed form */
00375 #define ASN1_NDEF_EXP(stname, field, type, tag) \
00376                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_NDEF)
00377 
00378 /* EXPLICIT OPTIONAL using indefinite length constructed form */
00379 #define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \
00380                         ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF)
00381 
00382 /* Macros for the ASN1_ADB structure */
00383 
00384 #define ASN1_ADB(name) \
00385         static const ASN1_ADB_TABLE name##_adbtbl[] 
00386 
00387 #ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
00388 
00389 #define ASN1_ADB_END(name, flags, field, app_table, def, none) \
00390         ;\
00391         static const ASN1_ADB name##_adb = {\
00392                 flags,\
00393                 offsetof(name, field),\
00394                 app_table,\
00395                 name##_adbtbl,\
00396                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
00397                 def,\
00398                 none\
00399         }
00400 
00401 #else
00402 
00403 #define ASN1_ADB_END(name, flags, field, app_table, def, none) \
00404         ;\
00405         static const ASN1_ITEM *name##_adb(void) \
00406         { \
00407         static const ASN1_ADB internal_adb = \
00408                 {\
00409                 flags,\
00410                 offsetof(name, field),\
00411                 app_table,\
00412                 name##_adbtbl,\
00413                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
00414                 def,\
00415                 none\
00416                 }; \
00417                 return (const ASN1_ITEM *) &internal_adb; \
00418         } \
00419         void dummy_function(void)
00420 
00421 #endif
00422 
00423 #define ADB_ENTRY(val, template) {val, template}
00424 
00425 #define ASN1_ADB_TEMPLATE(name) \
00426         static const ASN1_TEMPLATE name##_tt 
00427 
00428 /* This is the ASN1 template structure that defines
00429  * a wrapper round the actual type. It determines the
00430  * actual position of the field in the value structure,
00431  * various flags such as OPTIONAL and the field name.
00432  */
00433 
00434 struct ASN1_TEMPLATE_st {
00435 unsigned long flags;            /* Various flags */
00436 long tag;                       /* tag, not used if no tagging */
00437 unsigned long offset;           /* Offset of this field in structure */
00438 #ifndef NO_ASN1_FIELD_NAMES
00439 const char *field_name;         /* Field name */
00440 #endif
00441 ASN1_ITEM_EXP *item;            /* Relevant ASN1_ITEM or ASN1_ADB */
00442 };
00443 
00444 /* Macro to extract ASN1_ITEM and ASN1_ADB pointer from ASN1_TEMPLATE */
00445 
00446 #define ASN1_TEMPLATE_item(t) (t->item_ptr)
00447 #define ASN1_TEMPLATE_adb(t) (t->item_ptr)
00448 
00449 typedef struct ASN1_ADB_TABLE_st ASN1_ADB_TABLE;
00450 typedef struct ASN1_ADB_st ASN1_ADB;
00451 
00452 struct ASN1_ADB_st {
00453         unsigned long flags;    /* Various flags */
00454         unsigned long offset;   /* Offset of selector field */
00455         STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
00456         const ASN1_ADB_TABLE *tbl;      /* Table of possible types */
00457         long tblcount;          /* Number of entries in tbl */
00458         const ASN1_TEMPLATE *default_tt;  /* Type to use if no match */
00459         const ASN1_TEMPLATE *null_tt;  /* Type to use if selector is NULL */
00460 };
00461 
00462 struct ASN1_ADB_TABLE_st {
00463         long value;             /* NID for an object or value for an int */
00464         const ASN1_TEMPLATE tt;         /* item for this value */
00465 };
00466 
00467 /* template flags */
00468 
00469 /* Field is optional */
00470 #define ASN1_TFLG_OPTIONAL      (0x1)
00471 
00472 /* Field is a SET OF */
00473 #define ASN1_TFLG_SET_OF        (0x1 << 1)
00474 
00475 /* Field is a SEQUENCE OF */
00476 #define ASN1_TFLG_SEQUENCE_OF   (0x2 << 1)
00477 
00478 /* Special case: this refers to a SET OF that
00479  * will be sorted into DER order when encoded *and*
00480  * the corresponding STACK will be modified to match
00481  * the new order.
00482  */
00483 #define ASN1_TFLG_SET_ORDER     (0x3 << 1)
00484 
00485 /* Mask for SET OF or SEQUENCE OF */
00486 #define ASN1_TFLG_SK_MASK       (0x3 << 1)
00487 
00488 /* These flags mean the tag should be taken from the
00489  * tag field. If EXPLICIT then the underlying type
00490  * is used for the inner tag.
00491  */
00492 
00493 /* IMPLICIT tagging */
00494 #define ASN1_TFLG_IMPTAG        (0x1 << 3)
00495 
00496 
00497 /* EXPLICIT tagging, inner tag from underlying type */
00498 #define ASN1_TFLG_EXPTAG        (0x2 << 3)
00499 
00500 #define ASN1_TFLG_TAG_MASK      (0x3 << 3)
00501 
00502 /* context specific IMPLICIT */
00503 #define ASN1_TFLG_IMPLICIT      ASN1_TFLG_IMPTAG|ASN1_TFLG_CONTEXT
00504 
00505 /* context specific EXPLICIT */
00506 #define ASN1_TFLG_EXPLICIT      ASN1_TFLG_EXPTAG|ASN1_TFLG_CONTEXT
00507 
00508 /* If tagging is in force these determine the
00509  * type of tag to use. Otherwise the tag is
00510  * determined by the underlying type. These 
00511  * values reflect the actual octet format.
00512  */
00513 
00514 /* Universal tag */ 
00515 #define ASN1_TFLG_UNIVERSAL     (0x0<<6)
00516 /* Application tag */ 
00517 #define ASN1_TFLG_APPLICATION   (0x1<<6)
00518 /* Context specific tag */ 
00519 #define ASN1_TFLG_CONTEXT       (0x2<<6)
00520 /* Private tag */ 
00521 #define ASN1_TFLG_PRIVATE       (0x3<<6)
00522 
00523 #define ASN1_TFLG_TAG_CLASS     (0x3<<6)
00524 
00525 /* These are for ANY DEFINED BY type. In this case
00526  * the 'item' field points to an ASN1_ADB structure
00527  * which contains a table of values to decode the
00528  * relevant type
00529  */
00530 
00531 #define ASN1_TFLG_ADB_MASK      (0x3<<8)
00532 
00533 #define ASN1_TFLG_ADB_OID       (0x1<<8)
00534 
00535 #define ASN1_TFLG_ADB_INT       (0x1<<9)
00536 
00537 /* This flag means a parent structure is passed
00538  * instead of the field: this is useful is a
00539  * SEQUENCE is being combined with a CHOICE for
00540  * example. Since this means the structure and
00541  * item name will differ we need to use the
00542  * ASN1_CHOICE_END_name() macro for example.
00543  */
00544 
00545 #define ASN1_TFLG_COMBINE       (0x1<<10)
00546 
00547 /* This flag when present in a SEQUENCE OF, SET OF
00548  * or EXPLICIT causes indefinite length constructed
00549  * encoding to be used if required.
00550  */
00551 
00552 #define ASN1_TFLG_NDEF          (0x1<<11)
00553 
00554 /* This is the actual ASN1 item itself */
00555 
00556 struct ASN1_ITEM_st {
00557 char itype;                     /* The item type, primitive, SEQUENCE, CHOICE or extern */
00558 long utype;                     /* underlying type */
00559 const ASN1_TEMPLATE *templates; /* If SEQUENCE or CHOICE this contains the contents */
00560 long tcount;                    /* Number of templates if SEQUENCE or CHOICE */
00561 const void *funcs;              /* functions that handle this type */
00562 long size;                      /* Structure size (usually)*/
00563 #ifndef NO_ASN1_FIELD_NAMES
00564 const char *sname;              /* Structure name */
00565 #endif
00566 };
00567 
00568 /* These are values for the itype field and
00569  * determine how the type is interpreted.
00570  *
00571  * For PRIMITIVE types the underlying type
00572  * determines the behaviour if items is NULL.
00573  *
00574  * Otherwise templates must contain a single 
00575  * template and the type is treated in the
00576  * same way as the type specified in the template.
00577  *
00578  * For SEQUENCE types the templates field points
00579  * to the members, the size field is the
00580  * structure size.
00581  *
00582  * For CHOICE types the templates field points
00583  * to each possible member (typically a union)
00584  * and the 'size' field is the offset of the
00585  * selector.
00586  *
00587  * The 'funcs' field is used for application
00588  * specific functions. 
00589  *
00590  * For COMPAT types the funcs field gives a
00591  * set of functions that handle this type, this
00592  * supports the old d2i, i2d convention.
00593  *
00594  * The EXTERN type uses a new style d2i/i2d.
00595  * The new style should be used where possible
00596  * because it avoids things like the d2i IMPLICIT
00597  * hack.
00598  *
00599  * MSTRING is a multiple string type, it is used
00600  * for a CHOICE of character strings where the
00601  * actual strings all occupy an ASN1_STRING
00602  * structure. In this case the 'utype' field
00603  * has a special meaning, it is used as a mask
00604  * of acceptable types using the B_ASN1 constants.
00605  *
00606  * NDEF_SEQUENCE is the same as SEQUENCE except
00607  * that it will use indefinite length constructed
00608  * encoding if requested.
00609  *
00610  */
00611 
00612 #define ASN1_ITYPE_PRIMITIVE            0x0
00613 
00614 #define ASN1_ITYPE_SEQUENCE             0x1
00615 
00616 #define ASN1_ITYPE_CHOICE               0x2
00617 
00618 #define ASN1_ITYPE_COMPAT               0x3
00619 
00620 #define ASN1_ITYPE_EXTERN               0x4
00621 
00622 #define ASN1_ITYPE_MSTRING              0x5
00623 
00624 #define ASN1_ITYPE_NDEF_SEQUENCE        0x6
00625 
00626 /* Cache for ASN1 tag and length, so we
00627  * don't keep re-reading it for things
00628  * like CHOICE
00629  */
00630 
00631 struct ASN1_TLC_st{
00632         char valid;     /* Values below are valid */
00633         int ret;        /* return value */
00634         long plen;      /* length */
00635         int ptag;       /* class value */
00636         int pclass;     /* class value */
00637         int hdrlen;     /* header length */
00638 };
00639 
00640 /* Typedefs for ASN1 function pointers */
00641 
00642 typedef ASN1_VALUE * ASN1_new_func(void);
00643 typedef void ASN1_free_func(ASN1_VALUE *a);
00644 typedef ASN1_VALUE * ASN1_d2i_func(ASN1_VALUE **a, const unsigned char ** in, long length);
00645 typedef int ASN1_i2d_func(ASN1_VALUE * a, unsigned char **in);
00646 
00647 typedef int ASN1_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
00648                                         int tag, int aclass, char opt, ASN1_TLC *ctx);
00649 
00650 typedef int ASN1_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
00651 typedef int ASN1_ex_new_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
00652 typedef void ASN1_ex_free_func(ASN1_VALUE **pval, const ASN1_ITEM *it);
00653 
00654 typedef int ASN1_primitive_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
00655 typedef int ASN1_primitive_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
00656 
00657 typedef struct ASN1_COMPAT_FUNCS_st {
00658         ASN1_new_func *asn1_new;
00659         ASN1_free_func *asn1_free;
00660         ASN1_d2i_func *asn1_d2i;
00661         ASN1_i2d_func *asn1_i2d;
00662 } ASN1_COMPAT_FUNCS;
00663 
00664 typedef struct ASN1_EXTERN_FUNCS_st {
00665         void *app_data;
00666         ASN1_ex_new_func *asn1_ex_new;
00667         ASN1_ex_free_func *asn1_ex_free;
00668         ASN1_ex_free_func *asn1_ex_clear;
00669         ASN1_ex_d2i *asn1_ex_d2i;
00670         ASN1_ex_i2d *asn1_ex_i2d;
00671 } ASN1_EXTERN_FUNCS;
00672 
00673 typedef struct ASN1_PRIMITIVE_FUNCS_st {
00674         void *app_data;
00675         unsigned long flags;
00676         ASN1_ex_new_func *prim_new;
00677         ASN1_ex_free_func *prim_free;
00678         ASN1_ex_free_func *prim_clear;
00679         ASN1_primitive_c2i *prim_c2i;
00680         ASN1_primitive_i2c *prim_i2c;
00681 } ASN1_PRIMITIVE_FUNCS;
00682 
00683 /* This is the ASN1_AUX structure: it handles various
00684  * miscellaneous requirements. For example the use of
00685  * reference counts and an informational callback.
00686  *
00687  * The "informational callback" is called at various
00688  * points during the ASN1 encoding and decoding. It can
00689  * be used to provide minor customisation of the structures
00690  * used. This is most useful where the supplied routines
00691  * *almost* do the right thing but need some extra help
00692  * at a few points. If the callback returns zero then
00693  * it is assumed a fatal error has occurred and the 
00694  * main operation should be abandoned.
00695  *
00696  * If major changes in the default behaviour are required
00697  * then an external type is more appropriate.
00698  */
00699 
00700 typedef int ASN1_aux_cb(int operation, ASN1_VALUE **in, const ASN1_ITEM *it);
00701 
00702 typedef struct ASN1_AUX_st {
00703         void *app_data;
00704         int flags;
00705         int ref_offset;         /* Offset of reference value */
00706         int ref_lock;           /* Lock type to use */
00707         ASN1_aux_cb *asn1_cb;
00708         int enc_offset;         /* Offset of ASN1_ENCODING structure */
00709 } ASN1_AUX;
00710 
00711 /* Flags in ASN1_AUX */
00712 
00713 /* Use a reference count */
00714 #define ASN1_AFLG_REFCOUNT      1
00715 /* Save the encoding of structure (useful for signatures) */
00716 #define ASN1_AFLG_ENCODING      2
00717 /* The Sequence length is invalid */
00718 #define ASN1_AFLG_BROKEN        4
00719 
00720 /* operation values for asn1_cb */
00721 
00722 #define ASN1_OP_NEW_PRE         0
00723 #define ASN1_OP_NEW_POST        1
00724 #define ASN1_OP_FREE_PRE        2
00725 #define ASN1_OP_FREE_POST       3
00726 #define ASN1_OP_D2I_PRE         4
00727 #define ASN1_OP_D2I_POST        5
00728 #define ASN1_OP_I2D_PRE         6
00729 #define ASN1_OP_I2D_POST        7
00730 
00731 /* Macro to implement a primitive type */
00732 #define IMPLEMENT_ASN1_TYPE(stname) IMPLEMENT_ASN1_TYPE_ex(stname, stname, 0)
00733 #define IMPLEMENT_ASN1_TYPE_ex(itname, vname, ex) \
00734                                 ASN1_ITEM_start(itname) \
00735                                         ASN1_ITYPE_PRIMITIVE, V_##vname, NULL, 0, NULL, ex, #itname \
00736                                 ASN1_ITEM_end(itname)
00737 
00738 /* Macro to implement a multi string type */
00739 #define IMPLEMENT_ASN1_MSTRING(itname, mask) \
00740                                 ASN1_ITEM_start(itname) \
00741                                         ASN1_ITYPE_MSTRING, mask, NULL, 0, NULL, sizeof(ASN1_STRING), #itname \
00742                                 ASN1_ITEM_end(itname)
00743 
00744 /* Macro to implement an ASN1_ITEM in terms of old style funcs */
00745 
00746 #define IMPLEMENT_COMPAT_ASN1(sname) IMPLEMENT_COMPAT_ASN1_type(sname, V_ASN1_SEQUENCE)
00747 
00748 #define IMPLEMENT_COMPAT_ASN1_type(sname, tag) \
00749         static const ASN1_COMPAT_FUNCS sname##_ff = { \
00750                 (ASN1_new_func *)sname##_new, \
00751                 (ASN1_free_func *)sname##_free, \
00752                 (ASN1_d2i_func *)d2i_##sname, \
00753                 (ASN1_i2d_func *)i2d_##sname, \
00754         }; \
00755         ASN1_ITEM_start(sname) \
00756                 ASN1_ITYPE_COMPAT, \
00757                 tag, \
00758                 NULL, \
00759                 0, \
00760                 &sname##_ff, \
00761                 0, \
00762                 #sname \
00763         ASN1_ITEM_end(sname)
00764 
00765 #define IMPLEMENT_EXTERN_ASN1(sname, tag, fptrs) \
00766         ASN1_ITEM_start(sname) \
00767                 ASN1_ITYPE_EXTERN, \
00768                 tag, \
00769                 NULL, \
00770                 0, \
00771                 &fptrs, \
00772                 0, \
00773                 #sname \
00774         ASN1_ITEM_end(sname)
00775 
00776 /* Macro to implement standard functions in terms of ASN1_ITEM structures */
00777 
00778 #define IMPLEMENT_ASN1_FUNCTIONS(stname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, stname, stname)
00779 
00780 #define IMPLEMENT_ASN1_FUNCTIONS_name(stname, itname) IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, itname)
00781 
00782 #define IMPLEMENT_ASN1_FUNCTIONS_ENCODE_name(stname, itname) \
00783                         IMPLEMENT_ASN1_FUNCTIONS_ENCODE_fname(stname, itname, itname)
00784 
00785 #define IMPLEMENT_ASN1_ALLOC_FUNCTIONS(stname) \
00786                 IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, stname, stname)
00787 
00788 #define IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname) \
00789         stname *fname##_new(void) \
00790         { \
00791                 return (stname *)ASN1_item_new(ASN1_ITEM_rptr(itname)); \
00792         } \
00793         void fname##_free(stname *a) \
00794         { \
00795                 ASN1_item_free((ASN1_VALUE *)a, ASN1_ITEM_rptr(itname)); \
00796         }
00797 
00798 #define IMPLEMENT_ASN1_FUNCTIONS_fname(stname, itname, fname) \
00799         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
00800         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
00801 
00802 #define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(stname, itname, fname) \
00803         stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
00804         { \
00805                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
00806         } \
00807         int i2d_##fname(stname *a, unsigned char **out) \
00808         { \
00809                 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
00810         } 
00811 
00812 #define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \
00813         int i2d_##stname##_NDEF(stname *a, unsigned char **out) \
00814         { \
00815                 return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\
00816         } 
00817 
00818 /* This includes evil casts to remove const: they will go away when full
00819  * ASN1 constification is done.
00820  */
00821 #define IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
00822         stname *d2i_##fname(stname **a, const unsigned char **in, long len) \
00823         { \
00824                 return (stname *)ASN1_item_d2i((ASN1_VALUE **)a, in, len, ASN1_ITEM_rptr(itname));\
00825         } \
00826         int i2d_##fname(const stname *a, unsigned char **out) \
00827         { \
00828                 return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
00829         } 
00830 
00831 #define IMPLEMENT_ASN1_DUP_FUNCTION(stname) \
00832         stname * stname##_dup(stname *x) \
00833         { \
00834         return ASN1_item_dup(ASN1_ITEM_rptr(stname), x); \
00835         }
00836 
00837 #define IMPLEMENT_ASN1_FUNCTIONS_const(name) \
00838                 IMPLEMENT_ASN1_FUNCTIONS_const_fname(name, name, name)
00839 
00840 #define IMPLEMENT_ASN1_FUNCTIONS_const_fname(stname, itname, fname) \
00841         IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(stname, itname, fname) \
00842         IMPLEMENT_ASN1_ALLOC_FUNCTIONS_fname(stname, itname, fname)
00843 
00844 /* external definitions for primitive types */
00845 
00846 DECLARE_ASN1_ITEM(ASN1_BOOLEAN)
00847 DECLARE_ASN1_ITEM(ASN1_TBOOLEAN)
00848 DECLARE_ASN1_ITEM(ASN1_FBOOLEAN)
00849 DECLARE_ASN1_ITEM(ASN1_SEQUENCE)
00850 DECLARE_ASN1_ITEM(CBIGNUM)
00851 DECLARE_ASN1_ITEM(BIGNUM)
00852 DECLARE_ASN1_ITEM(LONG)
00853 DECLARE_ASN1_ITEM(ZLONG)
00854 
00855 DECLARE_STACK_OF(ASN1_VALUE)
00856 
00857 /* Functions used internally by the ASN1 code */
00858 
00859 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
00860 void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
00861 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
00862 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
00863 
00864 void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
00865 int ASN1_template_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_TEMPLATE *tt);
00866 int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len, const ASN1_ITEM *it,
00867                                 int tag, int aclass, char opt, ASN1_TLC *ctx);
00868 
00869 int ASN1_item_ex_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_ITEM *it, int tag, int aclass);
00870 int ASN1_template_i2d(ASN1_VALUE **pval, unsigned char **out, const ASN1_TEMPLATE *tt);
00871 void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
00872 
00873 int asn1_ex_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
00874 int asn1_ex_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
00875 
00876 int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it);
00877 int asn1_set_choice_selector(ASN1_VALUE **pval, int value, const ASN1_ITEM *it);
00878 
00879 ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
00880 
00881 const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt, int nullerr);
00882 
00883 int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it);
00884 
00885 void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it);
00886 void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
00887 int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval, const ASN1_ITEM *it);
00888 int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen, const ASN1_ITEM *it);
00889 
00890 #ifdef  __cplusplus
00891 }
00892 #endif
00893 #endif
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