Cryptlib/OpenSSL/crypto/asn1/asn1_par.c

   1 /* crypto/asn1/asn1_par.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "cryptlib.h"
  61 #include <openssl/buffer.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/asn1.h>
  64
  65 #ifndef ASN1_PARSE_MAXDEPTH
  66 #define ASN1_PARSE_MAXDEPTH 128
  67 #endif
  68
  69 static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
  70                            int indent);
  71 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
  72                        int offset, int depth, int indent, int dump);
  73 static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
  74                            int indent)
  75 {
  76     static const char fmt[] = "%-18s";
  77     char str[128];
  78     const char *p;
  79
  80     if (constructed & V_ASN1_CONSTRUCTED)
  81         p = "cons: ";
  82     else
  83         p = "prim: ";
  84     if (BIO_write(bp, p, 6) < 6)
  85         goto err;
  86     BIO_indent(bp, indent, 128);
  87
  88     p = str;
  89     if ((xclass & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
  90         BIO_snprintf(str, sizeof str, "priv [ %d ] ", tag);
  91     else if ((xclass & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
  92         BIO_snprintf(str, sizeof str, "cont [ %d ]", tag);
  93     else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
  94         BIO_snprintf(str, sizeof str, "appl [ %d ]", tag);
  95     else if (tag > 30)
  96         BIO_snprintf(str, sizeof str, "<ASN1 %d>", tag);
  97     else
  98         p = ASN1_tag2str(tag);
  99
 100     if (BIO_printf(bp, fmt, p) <= 0)
 101         goto err;
 102     return (1);
 103  err:
 104     return (0);
 105 }
 106
 107 int ASN1_parse(BIO *bp, const unsigned char *pp, long len, int indent)
 108 {
 109     return (asn1_parse2(bp, &pp, len, 0, 0, indent, 0));
 110 }
 111
 112 int ASN1_parse_dump(BIO *bp, const unsigned char *pp, long len, int indent,
 113                     int dump)
 114 {
 115     return (asn1_parse2(bp, &pp, len, 0, 0, indent, dump));
 116 }
 117
 118 static int asn1_parse2(BIO *bp, const unsigned char **pp, long length,
 119                        int offset, int depth, int indent, int dump)
 120 {
 121     const unsigned char *p, *ep, *tot, *op, *opp;
 122     long len;
 123     int tag, xclass, ret = 0;
 124     int nl, hl, j, r;
 125     ASN1_OBJECT *o = NULL;
 126     ASN1_OCTET_STRING *os = NULL;
 127     /* ASN1_BMPSTRING *bmp=NULL; */
 128     int dump_indent;
 129
 130 #if 0
 131     dump_indent = indent;
 132 #else
 133     dump_indent = 6;            /* Because we know BIO_dump_indent() */
 134 #endif
 135
 136     if (depth > ASN1_PARSE_MAXDEPTH) {
 137             BIO_puts(bp, "BAD RECURSION DEPTH\n");
 138             return 0;
 139     }
 140
 141     p = *pp;
 142     tot = p + length;
 143     op = p - 1;
 144     while ((p < tot) && (op < p)) {
 145         op = p;
 146         j = ASN1_get_object(&p, &len, &tag, &xclass, length);
 147 #ifdef LINT
 148         j = j;
 149 #endif
 150         if (j & 0x80) {
 151             if (BIO_write(bp, "Error in encoding\n", 18) <= 0)
 152                 goto end;
 153             ret = 0;
 154             goto end;
 155         }
 156         hl = (p - op);
 157         length -= hl;
 158         /*
 159          * if j == 0x21 it is a constructed indefinite length object
 160          */
 161         if (BIO_printf(bp, "%5ld:", (long)offset + (long)(op - *pp))
 162             <= 0)
 163             goto end;
 164
 165         if (j != (V_ASN1_CONSTRUCTED | 1)) {
 166             if (BIO_printf(bp, "d=%-2d hl=%ld l=%4ld ",
 167                            depth, (long)hl, len) <= 0)
 168                 goto end;
 169         } else {
 170             if (BIO_printf(bp, "d=%-2d hl=%ld l=inf  ", depth, (long)hl) <= 0)
 171                 goto end;
 172         }
 173         if (!asn1_print_info(bp, tag, xclass, j, (indent) ? depth : 0))
 174             goto end;
 175         if (j & V_ASN1_CONSTRUCTED) {
 176             const unsigned char *sp;
 177
 178             ep = p + len;
 179             if (BIO_write(bp, "\n", 1) <= 0)
 180                 goto end;
 181             if (len > length) {
 182                 BIO_printf(bp, "length is greater than %ld\n", length);
 183                 ret = 0;
 184                 goto end;
 185             }
 186             if ((j == 0x21) && (len == 0)) {
 187                 sp = p;
 188                 for (;;) {
 189                     r = asn1_parse2(bp, &p, (long)(tot - p),
 190                                     offset + (p - *pp), depth + 1,
 191                                     indent, dump);
 192                     if (r == 0) {
 193                         ret = 0;
 194                         goto end;
 195                     }
 196                     if ((r == 2) || (p >= tot)) {
 197                         len = p - sp;
 198                         break;
 199                     }
 200                 }
 201             } else {
 202                 long tmp = len;
 203
 204                 while (p < ep) {
 205                     sp = p;
 206                     r = asn1_parse2(bp, &p, tmp, offset + (p - *pp), depth + 1,
 207                                     indent, dump);
 208                     if (r == 0) {
 209                         ret = 0;
 210                         goto end;
 211                     }
 212                     tmp -= p - sp;
 213                 }
 214             }
 215         } else if (xclass != 0) {
 216             p += len;
 217             if (BIO_write(bp, "\n", 1) <= 0)
 218                 goto end;
 219         } else {
 220             nl = 0;
 221             if ((tag == V_ASN1_PRINTABLESTRING) ||
 222                 (tag == V_ASN1_T61STRING) ||
 223                 (tag == V_ASN1_IA5STRING) ||
 224                 (tag == V_ASN1_VISIBLESTRING) ||
 225                 (tag == V_ASN1_NUMERICSTRING) ||
 226                 (tag == V_ASN1_UTF8STRING) ||
 227                 (tag == V_ASN1_UTCTIME) || (tag == V_ASN1_GENERALIZEDTIME)) {
 228                 if (BIO_write(bp, ":", 1) <= 0)
 229                     goto end;
 230                 if ((len > 0) && BIO_write(bp, (const char *)p, (int)len)
 231                     != (int)len)
 232                     goto end;
 233             } else if (tag == V_ASN1_OBJECT) {
 234                 opp = op;
 235                 if (d2i_ASN1_OBJECT(&o, &opp, len + hl) != NULL) {
 236                     if (BIO_write(bp, ":", 1) <= 0)
 237                         goto end;
 238                     i2a_ASN1_OBJECT(bp, o);
 239                 } else {
 240                     if (BIO_write(bp, ":BAD OBJECT", 11) <= 0)
 241                         goto end;
 242                 }
 243             } else if (tag == V_ASN1_BOOLEAN) {
 244                 int ii;
 245
 246                 opp = op;
 247                 ii = d2i_ASN1_BOOLEAN(NULL, &opp, len + hl);
 248                 if (ii < 0) {
 249                     if (BIO_write(bp, "Bad boolean\n", 12) <= 0)
 250                         goto end;
 251                 }
 252                 BIO_printf(bp, ":%d", ii);
 253             } else if (tag == V_ASN1_BMPSTRING) {
 254                 /* do the BMP thang */
 255             } else if (tag == V_ASN1_OCTET_STRING) {
 256                 int i, printable = 1;
 257
 258                 opp = op;
 259                 os = d2i_ASN1_OCTET_STRING(NULL, &opp, len + hl);
 260                 if (os != NULL && os->length > 0) {
 261                     opp = os->data;
 262                     /*
 263                      * testing whether the octet string is printable
 264                      */
 265                     for (i = 0; i < os->length; i++) {
 266                         if (((opp[i] < ' ') &&
 267                              (opp[i] != '\n') &&
 268                              (opp[i] != '\r') &&
 269                              (opp[i] != '\t')) || (opp[i] > '~')) {
 270                             printable = 0;
 271                             break;
 272                         }
 273                     }
 274                     if (printable)
 275                         /* printable string */
 276                     {
 277                         if (BIO_write(bp, ":", 1) <= 0)
 278                             goto end;
 279                         if (BIO_write(bp, (const char *)opp, os->length) <= 0)
 280                             goto end;
 281                     } else if (!dump)
 282                         /*
 283                          * not printable => print octet string as hex dump
 284                          */
 285                     {
 286                         if (BIO_write(bp, "[HEX DUMP]:", 11) <= 0)
 287                             goto end;
 288                         for (i = 0; i < os->length; i++) {
 289                             if (BIO_printf(bp, "%02X", opp[i]) <= 0)
 290                                 goto end;
 291                         }
 292                     } else
 293                         /* print the normal dump */
 294                     {
 295                         if (!nl) {
 296                             if (BIO_write(bp, "\n", 1) <= 0)
 297                                 goto end;
 298                         }
 299                         if (BIO_dump_indent(bp,
 300                                             (const char *)opp,
 301                                             ((dump == -1 || dump >
 302                                               os->
 303                                               length) ? os->length : dump),
 304                                             dump_indent) <= 0)
 305                             goto end;
 306                         nl = 1;
 307                     }
 308                 }
 309                 if (os != NULL) {
 310                     M_ASN1_OCTET_STRING_free(os);
 311                     os = NULL;
 312                 }
 313             } else if (tag == V_ASN1_INTEGER) {
 314                 ASN1_INTEGER *bs;
 315                 int i;
 316
 317                 opp = op;
 318                 bs = d2i_ASN1_INTEGER(NULL, &opp, len + hl);
 319                 if (bs != NULL) {
 320                     if (BIO_write(bp, ":", 1) <= 0)
 321                         goto end;
 322                     if (bs->type == V_ASN1_NEG_INTEGER)
 323                         if (BIO_write(bp, "-", 1) <= 0)
 324                             goto end;
 325                     for (i = 0; i < bs->length; i++) {
 326                         if (BIO_printf(bp, "%02X", bs->data[i]) <= 0)
 327                             goto end;
 328                     }
 329                     if (bs->length == 0) {
 330                         if (BIO_write(bp, "00", 2) <= 0)
 331                             goto end;
 332                     }
 333                 } else {
 334                     if (BIO_write(bp, "BAD INTEGER", 11) <= 0)
 335                         goto end;
 336                 }
 337                 M_ASN1_INTEGER_free(bs);
 338             } else if (tag == V_ASN1_ENUMERATED) {
 339                 ASN1_ENUMERATED *bs;
 340                 int i;
 341
 342                 opp = op;
 343                 bs = d2i_ASN1_ENUMERATED(NULL, &opp, len + hl);
 344                 if (bs != NULL) {
 345                     if (BIO_write(bp, ":", 1) <= 0)
 346                         goto end;
 347                     if (bs->type == V_ASN1_NEG_ENUMERATED)
 348                         if (BIO_write(bp, "-", 1) <= 0)
 349                             goto end;
 350                     for (i = 0; i < bs->length; i++) {
 351                         if (BIO_printf(bp, "%02X", bs->data[i]) <= 0)
 352                             goto end;
 353                     }
 354                     if (bs->length == 0) {
 355                         if (BIO_write(bp, "00", 2) <= 0)
 356                             goto end;
 357                     }
 358                 } else {
 359                     if (BIO_write(bp, "BAD ENUMERATED", 14) <= 0)
 360                         goto end;
 361                 }
 362                 M_ASN1_ENUMERATED_free(bs);
 363             } else if (len > 0 && dump) {
 364                 if (!nl) {
 365                     if (BIO_write(bp, "\n", 1) <= 0)
 366                         goto end;
 367                 }
 368                 if (BIO_dump_indent(bp, (const char *)p,
 369                                     ((dump == -1 || dump > len) ? len : dump),
 370                                     dump_indent) <= 0)
 371                     goto end;
 372                 nl = 1;
 373             }
 374
 375             if (!nl) {
 376                 if (BIO_write(bp, "\n", 1) <= 0)
 377                     goto end;
 378             }
 379             p += len;
 380             if ((tag == V_ASN1_EOC) && (xclass == 0)) {
 381                 ret = 2;        /* End of sequence */
 382                 goto end;
 383             }
 384         }
 385         length -= len;
 386     }
 387     ret = 1;
 388  end:
 389     if (o != NULL)
 390         ASN1_OBJECT_free(o);
 391     if (os != NULL)
 392         M_ASN1_OCTET_STRING_free(os);
 393     *pp = p;
 394     return (ret);
 395 }
 396
 397 const char *ASN1_tag2str(int tag)
 398 {
 399     static const char *const tag2str[] = {
 400         /* 0-4 */
 401         "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING",
 402         /* 5-9 */
 403         "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL",
 404         /* 10-13 */
 405         "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>",
 406         /* 15-17 */
 407         "<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET",
 408         /* 18-20 */
 409         "NUMERICSTRING", "PRINTABLESTRING", "T61STRING",
 410         /* 21-24 */
 411         "VIDEOTEXSTRING", "IA5STRING", "UTCTIME", "GENERALIZEDTIME",
 412         /* 25-27 */
 413         "GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",
 414         /* 28-30 */
 415         "UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"
 416     };
 417
 418     if ((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
 419         tag &= ~0x100;
 420
 421     if (tag < 0 || tag > 30)
 422         return "(unknown)";
 423     return tag2str[tag];
 424 }