contrib/ldns/drill/drill_util.c

   1 /*
   2  * util.c
   3  * some handy function needed in drill and not implemented
   4  * in ldns
   5  * (c) 2005 NLnet Labs
   6  *
   7  * See the file LICENSE for the license
   8  *
   9  */
  10
  11 #include "drill.h"
  12 #include <ldns/ldns.h>
  13
  14 #include <errno.h>
  15
  16 static int
  17 read_line(FILE *input, char *line, size_t len)
  18 {
  19         int i;
  20
  21         char c;
  22         for (i = 0; i < (int)len-1; i++) {
  23                 c = (char)getc(input);
  24                 if (c == EOF) {
  25                         return -1;
  26                 } else if (c != '\n') {
  27                         line[i] = c;
  28                 } else {
  29                         break;
  30                 }
  31         }
  32         line[i] = '\0';
  33         return i;
  34 }
  35
  36 /* key_list must be initialized with ldns_rr_list_new() */
  37 ldns_status
  38 read_key_file(const char *filename, ldns_rr_list *key_list, bool silently)
  39 {
  40         int line_len = 0;
  41         int line_nr = 0;
  42         int key_count = 0;
  43         char line[LDNS_MAX_LINELEN];
  44         ldns_status status;
  45         FILE *input_file;
  46         ldns_rr *rr;
  47
  48         input_file = fopen(filename, "r");
  49         if (!input_file) {
  50                 if (! silently) {
  51                         fprintf(stderr, "Error opening %s: %s\n",
  52                                 filename, strerror(errno));
  53                 }
  54                 return LDNS_STATUS_ERR;
  55         }
  56         while (line_len >= 0) {
  57                 line_len = (int) read_line(input_file, line, sizeof(line));
  58                 line_nr++;
  59                 if (line_len > 0 && line[0] != ';') {
  60                         status = ldns_rr_new_frm_str(&rr, line, 0, NULL, NULL);
  61                         if (status != LDNS_STATUS_OK) {
  62                                 if (! silently) {
  63                                         fprintf(stderr,
  64                                                 "Error parsing DNSKEY RR "
  65                                                 "in line %d: %s\n", line_nr,
  66                                                 ldns_get_errorstr_by_id(status)
  67                                                 );
  68                                 }
  69                         } else if (ldns_rr_get_type(rr) == LDNS_RR_TYPE_DNSKEY ||
  70                                            ldns_rr_get_type(rr) == LDNS_RR_TYPE_DS) {
  71                                 ldns_rr_list_push_rr(key_list, rr);
  72                                 key_count++;
  73                         } else {
  74                                 ldns_rr_free(rr);
  75                         }
  76                 }
  77         }
  78         fclose(input_file);
  79         if (key_count > 0) {
  80                 return LDNS_STATUS_OK;
  81         } else {
  82                 /*fprintf(stderr, "No keys read\n");*/
  83                 return LDNS_STATUS_ERR;
  84         }
  85 }
  86
  87 ldns_rdf *
  88 ldns_rdf_new_addr_frm_str(char *str)
  89 {
  90         ldns_rdf *a;
  91
  92         a = ldns_rdf_new_frm_str(LDNS_RDF_TYPE_A, str);
  93         if (!a) {
  94                 /* maybe ip6 */
  95                 a = ldns_rdf_new_frm_str(LDNS_RDF_TYPE_AAAA, str);
  96                 if (!a) {
  97                         return NULL;
  98                 }
  99         }
 100         return a;
 101 }
 102
 103 static inline void
 104 local_print_ds(FILE* out, const char* pre, ldns_rr* ds)
 105 {
 106         if (out && ds) {
 107                 fprintf(out, "%s", pre);
 108                 ldns_rr_print(out, ds);
 109                 ldns_rr_free(ds);
 110         }
 111 }
 112
 113 /*
 114  * For all keys in a packet print the DS
 115  */
 116 void
 117 print_ds_of_keys(ldns_pkt *p)
 118 {
 119         ldns_rr_list *keys;
 120         uint16_t i;
 121         ldns_rr *ds;
 122
 123         /* TODO fix the section stuff, here or in ldns */
 124         keys = ldns_pkt_rr_list_by_type(p, LDNS_RR_TYPE_DNSKEY,
 125                         LDNS_SECTION_ANSWER);
 126
 127         /* this also returns the question section rr, which does not
 128          * have any data.... and this inturn crashes everything */
 129
 130         if (keys) {
 131                 for (i = 0; i < ldns_rr_list_rr_count(keys); i++) {
 132                         fprintf(stdout, ";\n; equivalent DS records for key %u:\n",
 133                                 (unsigned int)ldns_calc_keytag(ldns_rr_list_rr(keys, i)));
 134
 135                         ds = ldns_key_rr2ds(ldns_rr_list_rr(keys, i), LDNS_SHA1);
 136                         local_print_ds(stdout, "; sha1: ", ds);
 137                         ds = ldns_key_rr2ds(ldns_rr_list_rr(keys, i), LDNS_SHA256);
 138                         local_print_ds(stdout, "; sha256: ", ds);
 139                 }
 140                 ldns_rr_list_deep_free(keys);
 141         }
 142 }
 143
 144 static void
 145 print_class_type(FILE *fp, ldns_rr *r)
 146 {
 147         ldns_lookup_table *lt;
 148         lt = ldns_lookup_by_id(ldns_rr_classes, ldns_rr_get_class(r));
 149         if (lt) {
 150                 fprintf(fp, " %s", lt->name);
 151         } else {
 152                 fprintf(fp, " CLASS%d", ldns_rr_get_class(r));
 153         }
 154         /* okay not THE way - but the quickest */
 155         switch (ldns_rr_get_type(r)) {
 156                 case LDNS_RR_TYPE_RRSIG:
 157                         fprintf(fp, " RRSIG ");
 158                         break;
 159                 case LDNS_RR_TYPE_DNSKEY:
 160                         fprintf(fp, " DNSKEY ");
 161                         break;
 162                 case LDNS_RR_TYPE_DS:
 163                         fprintf(fp, " DS ");
 164                         break;
 165                 default:
 166                         break;
 167         }
 168 }
 169
 170
 171 void
 172 print_ds_abbr(FILE *fp, ldns_rr *ds)
 173 {
 174         if (!ds || (ldns_rr_get_type(ds) != LDNS_RR_TYPE_DS)) {
 175                 return;
 176         }
 177
 178         ldns_rdf_print(fp, ldns_rr_owner(ds));
 179         fprintf(fp, " %d", (int)ldns_rr_ttl(ds));
 180         print_class_type(fp, ds);
 181         ldns_rdf_print(fp, ldns_rr_rdf(ds, 0)); fprintf(fp, " ");
 182         ldns_rdf_print(fp, ldns_rr_rdf(ds, 1)); fprintf(fp, " ");
 183         ldns_rdf_print(fp, ldns_rr_rdf(ds, 2)); fprintf(fp, " ");
 184         ldns_rdf_print(fp, ldns_rr_rdf(ds, 3)); fprintf(fp, " ");
 185 }
 186
 187 /* print some of the elements of a signature */
 188 void
 189 print_rrsig_abbr(FILE *fp, ldns_rr *sig) {
 190         if (!sig || (ldns_rr_get_type(sig) != LDNS_RR_TYPE_RRSIG)) {
 191                 return;
 192         }
 193
 194         ldns_rdf_print(fp, ldns_rr_owner(sig));
 195         fprintf(fp, " %d", (int)ldns_rr_ttl(sig));
 196         print_class_type(fp, sig);
 197
 198         /* print a number of rdf's */
 199         /* typecovered */
 200         ldns_rdf_print(fp, ldns_rr_rdf(sig, 0)); fprintf(fp, " ");
 201         /* algo */
 202         ldns_rdf_print(fp, ldns_rr_rdf(sig, 1)); fprintf(fp, " ");
 203         /* labels */
 204         ldns_rdf_print(fp, ldns_rr_rdf(sig, 2)); fprintf(fp, " (\n\t\t\t");
 205         /* expir */
 206         ldns_rdf_print(fp, ldns_rr_rdf(sig, 4)); fprintf(fp, " ");
 207         /* incep */
 208         ldns_rdf_print(fp, ldns_rr_rdf(sig, 5)); fprintf(fp, " ");
 209         /* key-id */
 210         ldns_rdf_print(fp, ldns_rr_rdf(sig, 6)); fprintf(fp, " ");
 211         /* key owner */
 212         ldns_rdf_print(fp, ldns_rr_rdf(sig, 7)); fprintf(fp, ")");
 213 }
 214
 215 void
 216 print_dnskey_abbr(FILE *fp, ldns_rr *key)
 217 {
 218         if (!key || (ldns_rr_get_type(key) != LDNS_RR_TYPE_DNSKEY)) {
 219                 return;
 220         }
 221
 222         ldns_rdf_print(fp, ldns_rr_owner(key));
 223         fprintf(fp, " %d", (int)ldns_rr_ttl(key));
 224         print_class_type(fp, key);
 225
 226         /* print a number of rdf's */
 227         /* flags */
 228         ldns_rdf_print(fp, ldns_rr_rdf(key, 0)); fprintf(fp, " ");
 229         /* proto */
 230         ldns_rdf_print(fp, ldns_rr_rdf(key, 1)); fprintf(fp, " ");
 231         /* algo */
 232         ldns_rdf_print(fp, ldns_rr_rdf(key, 2));
 233
 234         if (ldns_rdf2native_int16(ldns_rr_rdf(key, 0)) == 256) {
 235                 fprintf(fp, " ;{id = %u (zsk), size = %db}", (unsigned int)ldns_calc_keytag(key),
 236                                 (int)ldns_rr_dnskey_key_size(key));
 237                 return;
 238         }
 239         if (ldns_rdf2native_int16(ldns_rr_rdf(key, 0)) == 257) {
 240                 fprintf(fp, " ;{id = %u (ksk), size = %db}", (unsigned int)ldns_calc_keytag(key),
 241                                 (int)ldns_rr_dnskey_key_size(key));
 242                 return;
 243         }
 244         fprintf(fp, " ;{id = %u, size = %db}", (unsigned int)ldns_calc_keytag(key),
 245                         (int)ldns_rr_dnskey_key_size(key));
 246 }
 247
 248 void
 249 print_rr_list_abbr(FILE *fp, ldns_rr_list *rrlist, const char *usr)
 250 {
 251         size_t i;
 252         ldns_rr_type tp;
 253
 254         for(i = 0; i < ldns_rr_list_rr_count(rrlist); i++) {
 255                 tp = ldns_rr_get_type(ldns_rr_list_rr(rrlist, i));
 256                 if (i == 0 && tp != LDNS_RR_TYPE_RRSIG) {
 257                         if (usr) {
 258                                 fprintf(fp, "%s ", usr);
 259                         }
 260                 }
 261                 switch(tp) {
 262                 case LDNS_RR_TYPE_DNSKEY:
 263                         print_dnskey_abbr(fp, ldns_rr_list_rr(rrlist, i));
 264                         break;
 265                 case LDNS_RR_TYPE_RRSIG:
 266                         print_rrsig_abbr(fp, ldns_rr_list_rr(rrlist, i));
 267                         break;
 268                 case LDNS_RR_TYPE_DS:
 269                         print_ds_abbr(fp, ldns_rr_list_rr(rrlist, i));
 270                         break;
 271                 default:
 272                         /* not handled */
 273                         break;
 274                 }
 275                 fputs("\n", fp);
 276         }
 277 }
 278
 279 void *
 280 xmalloc(size_t s)
 281 {
 282         void *p;
 283
 284         p = malloc(s);
 285         if (!p) {
 286                 printf("Mem failure\n");
 287                 exit(EXIT_FAILURE);
 288         }
 289         return p;
 290 }
 291
 292 void *
 293 xrealloc(void *p, size_t size)
 294 {
 295         void *q;
 296
 297         q = realloc(p, size);
 298         if (!q) {
 299                 printf("Mem failure\n");
 300                 exit(EXIT_FAILURE);
 301         }
 302         return q;
 303 }
 304
 305 void
 306 xfree(void *p)
 307 {
 308         if (p) {
 309                 free(p);
 310         }
 311 }