tests/tests-c-compiler/check-src/check-119.-gen-PER.c

   1 /*
   2  * Mode of operation:
   3  * Each of the *.in files is XER-decoded, then converted into PER,
   4  * then decoded back from PER, then encoded into XER again,
   5  * and finally compared to the original encoding.
   6  */
   7 #undef  NDEBUG
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <sys/types.h>
  11 #include <unistd.h>     /* for chdir(2) */
  12 #include <string.h>
  13 #include <dirent.h>
  14 #include <assert.h>
  15 #include <ctype.h>
  16 #include <errno.h>
  17
  18 #include <PDU.h>
  19
  20 #ifndef SRCDIR
  21 #define SRCDIR_S ".."
  22 #else
  23 #define STRINGIFY_MACRO2(x) #x
  24 #define STRINGIFY_MACRO(x)  STRINGIFY_MACRO2(x)
  25 #define SRCDIR_S    STRINGIFY_MACRO(SRCDIR)
  26 #endif
  27
  28 enum expectation {
  29         EXP_OK,         /* Encoding/decoding must succeed */
  30         EXP_CXER_EXACT, /* Encoding/decoding using CXER must be exact */
  31         EXP_CXER_DIFF,  /* Encoding/decoding using CXER must be different */
  32         EXP_BROKEN,     /* Decoding must fail */
  33         EXP_DIFFERENT,  /* Reconstruction will yield different encoding */
  34         EXP_PER_NOCOMP, /* Not PER compatible */
  35 };
  36
  37 static unsigned char buf[4096];
  38 static size_t buf_offset;
  39
  40 static int
  41 _buf_writer(const void *buffer, size_t size, void *app_key) {
  42         (void)app_key;
  43         assert(buf_offset + size < sizeof(buf));
  44         memcpy(buf + buf_offset, buffer, size);
  45 #ifdef ASN_EMIT_DEBUG
  46         unsigned char *b, *bend;
  47         b = buf + buf_offset;
  48         bend = b + size;
  49         fprintf(stderr, "=> [");
  50         for(; b < bend; b++) {
  51                 if(*b >= 32 && *b < 127 && *b != '%')
  52                         fprintf(stderr, "%c", *b);
  53                 else
  54                         fprintf(stderr, "%%%02x", *b);
  55         }
  56         fprintf(stderr, "]:%zd\n", size);
  57 #endif
  58         buf_offset += size;
  59         return 0;
  60 }
  61
  62 enum enctype {
  63         AS_PER,
  64         AS_DER,
  65         AS_XER,
  66         AS_CXER,
  67 };
  68
  69 static void
  70 save_object_as(PDU_t *st, enum expectation exp, enum enctype how) {
  71         asn_enc_rval_t rval; /* Return value */
  72
  73         buf_offset = 0;
  74
  75         /*
  76          * Save object using specified method.
  77          */
  78         switch(how) {
  79         case AS_PER:
  80                 rval = uper_encode(&asn_DEF_PDU, 0, st,
  81                         _buf_writer, 0);
  82                 if(exp == EXP_PER_NOCOMP)
  83                         assert(rval.encoded == -1);
  84                 else
  85                         assert(rval.encoded > 0);
  86                 fprintf(stderr, "SAVED OBJECT IN SIZE %zd\n", buf_offset);
  87                 return;
  88         case AS_DER:
  89                 rval = der_encode(&asn_DEF_PDU, st,
  90                         _buf_writer, 0);
  91                 break;
  92         case AS_XER:
  93                 rval = xer_encode(&asn_DEF_PDU, st, XER_F_BASIC,
  94                         _buf_writer, 0);
  95                 break;
  96         case AS_CXER:
  97                 rval = xer_encode(&asn_DEF_PDU, st, XER_F_CANONICAL,
  98                         _buf_writer, 0);
  99                 break;
 100     default:
 101         assert(!"Unreachable");
 102         }
 103
 104         if (rval.encoded == -1) {
 105                 fprintf(stderr,
 106                         "Cannot encode %s: %s\n",
 107                         rval.failed_type->name, strerror(errno));
 108                 assert(rval.encoded != -1);
 109                 return;
 110         }
 111
 112         fprintf(stderr, "SAVED OBJECT IN SIZE %zd\n", buf_offset);
 113 }
 114
 115 static PDU_t *
 116 load_object_from(const char *fname, enum expectation expectation, unsigned char *fbuf, size_t size, enum enctype how) {
 117         asn_dec_rval_t rval;
 118         PDU_t *st = 0;
 119         size_t csize = 1;
 120
 121         if(getenv("INITIAL_CHUNK_SIZE"))
 122                 csize = atoi(getenv("INITIAL_CHUNK_SIZE"));
 123
 124         /* Perform multiple iterations with multiple chunks sizes */
 125         for(; csize < 20; csize += 1) {
 126                 int fbuf_offset = 0;
 127                 int fbuf_left = size;
 128                 int fbuf_chunk = csize;
 129
 130                 fprintf(stderr, "LOADING OBJECT OF SIZE %zd FROM [%s] as %s,"
 131                         " chunks %zd\n",
 132                         size, fname, how==AS_PER?"PER":"XER", csize);
 133
 134                 if(st) ASN_STRUCT_FREE(asn_DEF_PDU, st);
 135                 st = 0;
 136
 137                 do {
 138                         ASN_DEBUG("Decoding bytes %d..%d (left %d)",
 139                                 fbuf_offset,
 140                                         fbuf_chunk < fbuf_left
 141                                                 ? fbuf_chunk : fbuf_left,
 142                                         fbuf_left);
 143 #ifdef  ASN_EMIT_DEBUG
 144                         if(st) {
 145                                 fprintf(stderr, "=== currently ===\n");
 146                                 asn_fprint(stderr, &asn_DEF_PDU, st);
 147                                 fprintf(stderr, "=== end ===\n");
 148                         }
 149 #endif
 150                         switch(how) {
 151                         case AS_XER:
 152                                 rval = xer_decode(0, &asn_DEF_PDU, (void **)&st,
 153                                         fbuf + fbuf_offset,
 154                                         fbuf_chunk < fbuf_left
 155                                         ? fbuf_chunk : fbuf_left);
 156                                 break;
 157                         case AS_PER:
 158                                 rval = uper_decode(0, &asn_DEF_PDU,
 159                                         (void **)&st, fbuf + fbuf_offset,
 160                                         fbuf_chunk < fbuf_left
 161                                         ? fbuf_chunk : fbuf_left, 0, 0);
 162                                 if(rval.code == RC_WMORE) {
 163                                         rval.consumed = 0; /* Not restartable */
 164                                         ASN_STRUCT_FREE(asn_DEF_PDU, st);
 165                                         st = 0;
 166                                         ASN_DEBUG("-> PER wants more");
 167                                 } else {
 168                                         ASN_DEBUG("-> PER ret %d/%zd",
 169                                                 rval.code, rval.consumed);
 170                                         /* uper_decode() returns _bits_ */
 171                                         rval.consumed += 7;
 172                                         rval.consumed /= 8;
 173                                 }
 174                                 break;
 175             case AS_DER:
 176             case AS_CXER:
 177                 assert(!"Unexpected DER or CXER load request");
 178             default:
 179                 assert(!"Unreachable");
 180                         }
 181                         fbuf_offset += rval.consumed;
 182                         fbuf_left -= rval.consumed;
 183                         if(rval.code == RC_WMORE)
 184                                 fbuf_chunk += 1;        /* Give little more */
 185                         else
 186                                 fbuf_chunk = csize;     /* Back off */
 187                 } while(fbuf_left && rval.code == RC_WMORE);
 188
 189                 if(expectation != EXP_BROKEN) {
 190                         assert(rval.code == RC_OK);
 191                         if(how == AS_PER) {
 192                                 fprintf(stderr, "[left %d, off %d, size %zd]\n",
 193                                         fbuf_left, fbuf_offset, size);
 194                                 assert(fbuf_offset == (ssize_t)size);
 195                         } else {
 196                                 assert((fbuf_offset + 1 /* "\n" */  == (ssize_t)size
 197                                         && fbuf[size - 1] == '\n')
 198                                 || (fbuf_offset + 2 /* "\r\n" */  == (ssize_t)size
 199                                         && fbuf[size - 2] == '\r'
 200                                         && fbuf[size - 1] == '\n')
 201                                 );
 202                         }
 203                 } else {
 204                         assert(rval.code != RC_OK);
 205                         fprintf(stderr, "Failed, but this was expected\n");
 206                         ASN_STRUCT_FREE(asn_DEF_PDU, st);
 207                         st = 0; /* ignore leak for now */
 208                 }
 209         }
 210
 211         if(st) asn_fprint(stderr, &asn_DEF_PDU, st);
 212         return st;
 213 }
 214
 215 static int
 216 xer_encoding_equal(void *obufp, size_t osize, void *nbufp, size_t nsize) {
 217     char *obuf = obufp;
 218     char *nbuf = nbufp;
 219         char *oend = obuf + osize;
 220         char *nend = nbuf + nsize;
 221
 222         if((osize && !nsize) || (!osize && nsize))
 223                 return 0;       /* not equal apriori */
 224
 225         while(1) {
 226                 while(obuf < oend && isspace(*obuf)) obuf++;
 227                 while(nbuf < nend && isspace(*nbuf)) nbuf++;
 228
 229                 if(obuf == oend || nbuf == nend) {
 230                         if(obuf == oend && nbuf == nend)
 231                                 break;
 232                         fprintf(stderr, "%s data in reconstructed encoding\n",
 233                                 (obuf == oend) ? "More" : "Less");
 234                         return 0;
 235                 }
 236
 237                 if(*obuf != *nbuf) {
 238                         printf("%c%c != %c%c\n",
 239                                 obuf[0], obuf[1],
 240                                 nbuf[0], nbuf[1]);
 241                         return 0;
 242                 }
 243                 obuf++, nbuf++;
 244         }
 245
 246         return 1;
 247 }
 248
 249 static void
 250 process_XER_data(const char *fname, enum expectation expectation, unsigned char *fbuf, ssize_t size) {
 251         PDU_t *st;
 252
 253         st = load_object_from(fname, expectation, fbuf, size, AS_XER);
 254         if(!st) return;
 255
 256         /* Save and re-load as PER */
 257         save_object_as(st, expectation, AS_PER);
 258         ASN_STRUCT_FREE(asn_DEF_PDU, st);
 259
 260         if(expectation == EXP_PER_NOCOMP)
 261                 return; /* Already checked */
 262         st = load_object_from("buffer", expectation, buf, buf_offset, AS_PER);
 263         assert(st);
 264
 265         save_object_as(st,
 266                         expectation,
 267                         (expectation == EXP_CXER_EXACT
 268                         || expectation == EXP_CXER_DIFF)
 269                         ? AS_CXER : AS_XER);
 270         fprintf(stderr, "=== original ===\n");
 271         fwrite(fbuf, 1, size, stderr);
 272         fprintf(stderr, "=== re-encoded ===\n");
 273         fwrite(buf, 1, buf_offset, stderr);
 274         fprintf(stderr, "=== end ===\n");
 275
 276         switch(expectation) {
 277         case EXP_DIFFERENT:
 278                 assert(!xer_encoding_equal(fbuf, size, buf, buf_offset));
 279                 break;
 280         case EXP_BROKEN:
 281                 assert(!xer_encoding_equal(fbuf, size, buf, buf_offset));
 282                 break;
 283         case EXP_CXER_EXACT:
 284                 buf[buf_offset++] = '\n';
 285                 assert((ssize_t)size == (ssize_t)buf_offset);
 286                 assert(memcmp(fbuf, buf, size) == 0);
 287                 break;
 288         case EXP_CXER_DIFF:
 289                 buf[buf_offset++] = '\n';
 290                 assert((ssize_t)size != (ssize_t)buf_offset
 291                         || memcmp(fbuf, buf, size));
 292                 break;
 293         case EXP_OK:
 294         case EXP_PER_NOCOMP:
 295                 assert(xer_encoding_equal(fbuf, size, buf, buf_offset));
 296                 break;
 297         }
 298
 299         ASN_STRUCT_FREE(asn_DEF_PDU, st);
 300 }
 301
 302 /*
 303  * Decode the .der files and try to regenerate them.
 304  */
 305 static int
 306 process(const char *fname) {
 307         unsigned char fbuf[4096];
 308         char *ext = strrchr(fname, '.');
 309         enum expectation expectation;
 310         int rd;
 311         FILE *fp;
 312
 313         if(ext == 0 || strcmp(ext, ".in"))
 314                 return 0;
 315
 316         switch(ext[-1]) {
 317         case 'B':       /* The file is intentionally broken */
 318                 expectation = EXP_BROKEN; break;
 319         case 'D':       /* Reconstructing should yield different data */
 320                 expectation = EXP_DIFFERENT; break;
 321         case 'E':       /* Byte to byte exact reconstruction */
 322                 expectation = EXP_CXER_EXACT; break;
 323         case 'X':       /* Should fail byte-to-byte comparison */
 324                 expectation = EXP_CXER_DIFF; break;
 325         case 'P':       /* Incompatible with PER */
 326                 expectation = EXP_PER_NOCOMP; break;
 327         default:
 328                 expectation = EXP_OK; break;
 329         }
 330
 331         fprintf(stderr, "\nProcessing file [../%s]\n", fname);
 332
 333         snprintf((char *)fbuf, sizeof(fbuf), SRCDIR_S "/data-119/%s", fname);
 334         fp = fopen((char *)fbuf, "r");
 335         assert(fp);
 336
 337         rd = fread(fbuf, 1, sizeof(fbuf), fp);
 338         fclose(fp);
 339
 340         assert(rd < (ssize_t)sizeof(fbuf));     /* expect small files */
 341
 342         process_XER_data(fname, expectation, fbuf, rd);
 343
 344         fprintf(stderr, "Finished [%s]\n", fname);
 345
 346         return 1;
 347 }
 348
 349 int
 350 main() {
 351         DIR *dir;
 352         struct dirent *dent;
 353         int processed_files = 0;
 354         char *str;
 355
 356         /* Process a specific test file */
 357         str = getenv("DATA_119_FILE");
 358         if(str && strncmp(str, "data-119-", 9) == 0) {
 359                 process(str);
 360                 return 0;
 361         }
 362
 363         dir = opendir(SRCDIR_S "/data-119");
 364         assert(dir);
 365
 366         /*
 367          * Process each file in that directory.
 368          */
 369         while((dent = readdir(dir))) {
 370                 if(strncmp(dent->d_name, "data-119-", 9) == 0)
 371                         if(process(dent->d_name))
 372                                 processed_files++;
 373         }
 374
 375         assert(processed_files);
 376         closedir(dir);
 377
 378         return 0;
 379 }
 380