lib/asn1/asn1_gen.c

   1 /*
   2  * Copyright (c) 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 "der_locl.h"
  35 #include <com_err.h>
  36 #include <sys/types.h>
  37 #include <sys/stat.h>
  38 #include <ctype.h>
  39 #include <getarg.h>
  40 #include <hex.h>
  41 #include <err.h>
  42
  43 RCSID("$Id$");
  44
  45 static int
  46 doit(const char *fn)
  47 {
  48     char buf[2048];
  49     char *fnout = NULL;
  50     const char *bname;
  51     unsigned long line = 0;
  52     FILE *f, *fout;
  53     size_t offset = 0;
  54
  55     f = fopen(fn, "r");
  56     if (f == NULL)
  57         err(1, "fopen");
  58
  59     bname = strrchr(fn, '/');
  60     if (bname)
  61         bname++;
  62     else
  63         bname = fn;
  64
  65     if (asprintf(&fnout, "%s.out", bname) < 0 || fnout == NULL)
  66         errx(1, "malloc");
  67
  68     fout = fopen(fnout, "w");
  69     if (fout == NULL)
  70         err(1, "fopen: output file");
  71
  72     while (fgets(buf, sizeof(buf), f) != NULL) {
  73         char *ptr, *class, *type, *tag, *length, *data, *foo;
  74         int ret, l, c, ty, ta;
  75         unsigned char p[6], *pdata;
  76         size_t sz;
  77
  78         line++;
  79
  80         buf[strcspn(buf, "\r\n")] = '\0';
  81         if (buf[0] == '#' || buf[0] == '\0')
  82             continue;
  83
  84         ptr = buf;
  85         while (isspace((unsigned char)*ptr))
  86                ptr++;
  87
  88         class = strtok_r(ptr, " \t\n", &foo);
  89         if (class == NULL) errx(1, "class missing on line %lu", line);
  90         type = strtok_r(NULL, " \t\n", &foo);
  91         if (type == NULL) errx(1, "type missing on line %lu", line);
  92         tag = strtok_r(NULL, " \t\n", &foo);
  93         if (tag == NULL) errx(1, "tag missing on line %lu", line);
  94         length = strtok_r(NULL, " \t\n", &foo);
  95         if (length == NULL) errx(1, "length missing on line %lu", line);
  96         data = strtok_r(NULL, " \t\n", &foo);
  97
  98         c = der_get_class_num(class);
  99         if (c == -1) errx(1, "no valid class on line %lu", line);
 100         ty = der_get_type_num(type);
 101         if (ty == -1) errx(1, "no valid type on line %lu", line);
 102         ta = der_get_tag_num(tag);
 103         if (ta == -1)
 104             ta = atoi(tag);
 105
 106         l = atoi(length);
 107
 108         printf("line: %3lu offset: %3lu class: %d type: %d "
 109                "tag: %3d length: %3d %s\n",
 110                line, (unsigned long)offset, c, ty, ta, l,
 111                data ? "<have data>" : "<no data>");
 112
 113         ret = der_put_length_and_tag(p + sizeof(p) - 1, sizeof(p),
 114                                      l,
 115                                      c,
 116                                      ty,
 117                                      ta,
 118                                      &sz);
 119         if (ret)
 120             errx(1, "der_put_length_and_tag: %d", ret);
 121
 122         if (fwrite(p + sizeof(p) - sz , sz, 1, fout) != 1)
 123             err(1, "fwrite length/tag failed");
 124         offset += sz;
 125
 126         if (data) {
 127             size_t datalen;
 128
 129             datalen = strlen(data) / 2;
 130             pdata = emalloc(sz);
 131
 132             if (hex_decode(data, pdata, datalen) != datalen)
 133                 errx(1, "failed to decode data");
 134
 135             if (fwrite(pdata, datalen, 1, fout) != 1)
 136                 err(1, "fwrite data failed");
 137             offset += datalen;
 138
 139             free(pdata);
 140         }
 141     }
 142     printf("line: eof offset: %lu\n", (unsigned long)offset);
 143
 144     if (fclose(fout) == EOF)
 145         err(1, "writes to file %s failed", fnout);
 146     fclose(f);
 147     return 0;
 148 }
 149
 150
 151 static int version_flag;
 152 static int help_flag;
 153 struct getargs args[] = {
 154     { "version", 0, arg_flag, &version_flag, NULL, NULL },
 155     { "help", 0, arg_flag, &help_flag, NULL, NULL }
 156 };
 157 int num_args = sizeof(args) / sizeof(args[0]);
 158
 159 static void
 160 usage(int code)
 161 {
 162     arg_printusage(args, num_args, NULL, "parse-file");
 163     exit(code);
 164 }
 165
 166 int
 167 main(int argc, char **argv)
 168 {
 169     int optidx = 0;
 170
 171     setprogname (argv[0]);
 172
 173     if(getarg(args, num_args, argc, argv, &optidx))
 174         usage(1);
 175     if(help_flag)
 176         usage(0);
 177     if(version_flag) {
 178         print_version(NULL);
 179         exit(0);
 180     }
 181     argv += optidx;
 182     argc -= optidx;
 183     if (argc != 1)
 184         usage (1);
 185
 186     return doit (argv[0]);
 187 }