lib/asn1/main.c

   1 /*
   2  * Copyright (c) 1997-2005 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "gen_locl.h"
  35 #include <getarg.h>
  36 #include "lex.h"
  37
  38 extern FILE *yyin;
  39
  40 static getarg_strings preserve;
  41 static getarg_strings seq;
  42 static getarg_strings decorate;
  43
  44 int
  45 preserve_type(const char *p)
  46 {
  47     int i;
  48     for (i = 0; i < preserve.num_strings; i++)
  49         if (strcmp(preserve.strings[i], p) == 0)
  50             return 1;
  51     return 0;
  52 }
  53
  54 int
  55 seq_type(const char *p)
  56 {
  57     size_t i;
  58
  59     for (i = 0; i < seq.num_strings; i++)
  60         if (strcmp(seq.strings[i], p) == 0)
  61             return 1;
  62     return 0;
  63 }
  64
  65 int
  66 decorate_type(const char *p, char **field_type, char **field_name, int *opt)
  67 {
  68     size_t plen = strlen(p);
  69     size_t i;
  70
  71     *field_type = NULL;
  72     *field_name = NULL;
  73     *opt = 0;
  74
  75     for (i = 0; i < decorate.num_strings; i++) {
  76         const char *r;
  77         char *q;
  78
  79         if (strncmp(decorate.strings[i], p, plen) != 0)
  80             continue;
  81         if (decorate.strings[i][plen] != ':')
  82             errx(1, "--decorate argument missing field type");
  83
  84         p = &decorate.strings[i][plen + 1];
  85         if ((r = strchr(p, ':')) == NULL)
  86             errx(1, "--decorate argument missing field name");
  87         r++;
  88         *field_type = estrdup(p);
  89         *(strchr(*field_type, ':')) = '\0';
  90         *field_name = estrdup(r);
  91         if ((q = strchr(*field_name, '?'))) {
  92             *q = '\0';
  93             *opt = 1;
  94         }
  95         return 1;
  96     }
  97     return 0;
  98 }
  99
 100 static const char *
 101 my_basename(const char *fn)
 102 {
 103     const char *base, *p;
 104
 105     for (p = base = fn; *p; p++) {
 106 #ifdef WIN32
 107         if (*p == '/' || *p == '\\')
 108             base = p + 1;
 109 #else
 110         if (*p == '/')
 111             base = p + 1;
 112 #endif
 113     }
 114     return base;
 115 }
 116
 117 const char *fuzzer_string = "";
 118 const char *enum_prefix;
 119 const char *name;
 120 int prefix_enum;
 121 int fuzzer_flag;
 122 int support_ber;
 123 int template_flag;
 124 int rfc1510_bitstring;
 125 int one_code_file;
 126 char *option_file;
 127 int parse_units_flag = 1;
 128 char *type_file_string = "krb5-types.h";
 129 int original_order;
 130 int version_flag;
 131 int help_flag;
 132 struct getargs args[] = {
 133     { "fuzzer", 0, arg_flag, &fuzzer_flag, NULL, NULL },
 134     { "template", 0, arg_flag, &template_flag, NULL, NULL },
 135     { "prefix-enum", 0, arg_flag, &prefix_enum,
 136         "prefix C enum labels for ENUMERATED types and INTEGER types with the "
 137             "type's name", NULL },
 138     { "enum-prefix", 0, arg_string, &enum_prefix,
 139         "prefix for C enum labels for ENUMERATED types and INTEGER types with "
 140             "enumerated values", "PREFIX" },
 141     { "encode-rfc1510-bit-string", 0, arg_flag, &rfc1510_bitstring,
 142         "Use RFC1510 incorrect BIT STRING handling for all BIT STRING types "
 143             "in the module", NULL },
 144     { "decode-dce-ber", 0, arg_flag, &support_ber,
 145         "Allow DCE-style BER on decode", NULL },
 146     { "support-ber", 0, arg_flag, &support_ber, "Allow BER on decode", NULL },
 147     { "preserve-binary", 0, arg_strings, &preserve,
 148         "Names of types for which to generate _save fields, saving original "
 149             "encoding, in containing structures (useful for signature "
 150             "verification)", "TYPE-NAME" },
 151     { "sequence", 0, arg_strings, &seq,
 152         "Generate add/remove functions for SEQUENCE OF types", "TYPE-NAME" },
 153     { "decorate", 0, arg_strings, &decorate,
 154         "Generate private field for SEQUENCE/SET type", "TYPE-NAME:FIELD_TYPE:field_name[?]" },
 155     { "one-code-file", 0, arg_flag, &one_code_file, NULL, NULL },
 156     { "gen-name", 0, arg_string, &name,
 157         "Name of generated module", "NAME" },
 158     { "option-file", 0, arg_string, &option_file,
 159         "File with additional compiler CLI options", "FILE" },
 160     { "original-order", 0, arg_flag, &original_order,
 161         "Define C types and functions in the order in which they appear in "
 162             "the ASN.1 module instead of topologically sorting types.  This "
 163             "is useful for comparing output to earlier compiler versions.",
 164         NULL },
 165     { "parse-units", 0, arg_negative_flag, &parse_units_flag,
 166         "Do not generate roken-style units", NULL },
 167     { "type-file", 0, arg_string, &type_file_string,
 168         "Name of a C header file to generate includes of for base types",
 169         "C-HEADER-FILE" },
 170     { "version", 0, arg_flag, &version_flag, NULL, NULL },
 171     { "help", 0, arg_flag, &help_flag, NULL, NULL }
 172 };
 173 int num_args = sizeof(args) / sizeof(args[0]);
 174
 175 static void
 176 usage(int code)
 177 {
 178     arg_printusage(args, num_args, NULL, "[asn1-file [name]]");
 179     exit(code);
 180 }
 181
 182 int error_flag;
 183
 184 int
 185 main(int argc, char **argv)
 186 {
 187     int ret;
 188     const char *file;
 189     FILE *opt = NULL;
 190     int optidx = 0;
 191     char **arg = NULL;
 192     size_t len = 0;
 193     size_t sz = 0;
 194     int i;
 195
 196     setprogname(argv[0]);
 197     if (getarg(args, num_args, argc, argv, &optidx))
 198         usage(1);
 199     if (help_flag)
 200         usage(0);
 201     if (version_flag) {
 202         print_version(NULL);
 203         exit(0);
 204     }
 205     if (argc == optidx) {
 206         /* Compile the module on stdin */
 207         file = "stdin";
 208         name = "stdin";
 209         yyin = stdin;
 210     } else {
 211         /* Compile a named module */
 212         file = argv[optidx];
 213
 214         /*
 215          * If the .asn1 stem is not given, then assume it, and also assume
 216          * --option-file was given if the .opt file exists
 217          */
 218         if (strchr(file, '.') == NULL) {
 219             char *s = NULL;
 220
 221             if (asprintf(&s, "%s.opt", file) == -1 || s == NULL)
 222                 err(1, "Out of memory");
 223             if ((opt = fopen(s, "r")))
 224                 option_file = s;
 225             else
 226                 free(s);
 227             if (asprintf(&s, "%s.asn1", file) == -1 || s == NULL)
 228                 err(1, "Out of memory");
 229             file = s;
 230         }
 231         yyin = fopen (file, "r");
 232         if (yyin == NULL)
 233             err (1, "open %s", file);
 234         if (argc == optidx + 1) {
 235             char *p;
 236
 237             /* C module name substring not given; derive from file name */
 238             name = my_basename(estrdup(file));
 239             p = strrchr(name, '.');
 240             if (p)
 241                 *p = '\0';
 242         } else
 243             name = argv[optidx + 1];
 244     }
 245
 246     /*
 247      * Parse extra options file
 248      */
 249     if (option_file) {
 250         char buf[1024];
 251
 252         if (opt == NULL &&
 253             (opt = fopen(option_file, "r")) == NULL)
 254             err(1, "Could not open given option file %s", option_file);
 255
 256         arg = calloc(2, sizeof(arg[0]));
 257         if (arg == NULL) {
 258             perror("calloc");
 259             exit(1);
 260         }
 261         arg[0] = option_file;
 262         arg[1] = NULL;
 263         len = 1;
 264         sz = 2;
 265
 266         while (fgets(buf, sizeof(buf), opt) != NULL) {
 267             buf[strcspn(buf, "\n\r")] = '\0';
 268
 269             if (len + 1 >= sz) {
 270                 arg = realloc(arg, (sz + (sz>>1) + 2) * sizeof(arg[0]));
 271                 if (arg == NULL) {
 272                     perror("malloc");
 273                     exit(1);
 274                 }
 275                 sz += (sz>>1) + 2;
 276             }
 277             arg[len] = strdup(buf);
 278             if (arg[len] == NULL) {
 279                 perror("strdup");
 280                 exit(1);
 281             }
 282             arg[len + 1] = NULL;
 283             len++;
 284         }
 285         fclose(opt);
 286
 287         optidx = 0;
 288         if(getarg(args, num_args, len, arg, &optidx))
 289             usage(1);
 290
 291         if (len != optidx) {
 292             fprintf(stderr, "extra args");
 293             exit(1);
 294         }
 295     }
 296
 297     if (fuzzer_flag) {
 298         if (!template_flag) {
 299             printf("can't do fuzzer w/o --template");
 300             exit(1);
 301         }
 302 #ifdef ASN1_FUZZER
 303         fuzzer_string = "_fuzzer";
 304 #endif
 305     }
 306
 307
 308     init_generate(file, name);
 309
 310     if (one_code_file)
 311         generate_header_of_codefile(name);
 312
 313     initsym ();
 314     ret = yyparse ();
 315     if(ret != 0 || error_flag != 0)
 316         exit(1);
 317     if (!original_order)
 318         generate_types();
 319     close_generate ();
 320     if (argc != optidx)
 321         fclose(yyin);
 322
 323     if (one_code_file)
 324         close_codefile();
 325
 326     if (arg) {
 327         for (i = 1; i < len; i++)
 328             free(arg[i]);
 329         free(arg);
 330     }
 331
 332     return 0;
 333 }