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cell_rendezvous.c (12525B)

      1 /* cell_rendezvous.c -- generated by Trunnel v1.5.3.
      2 * https://gitweb.torproject.org/trunnel.git
      3 * You probably shouldn't edit this file.
      4 */
      5 #include <stdlib.h>
      6 #include "trunnel-impl.h"
      7 
      8 #include "cell_rendezvous.h"
      9 
     10 #define TRUNNEL_SET_ERROR_CODE(obj) \
     11  do {                              \
     12    (obj)->trunnel_error_code_ = 1; \
     13  } while (0)
     14 
     15 #if defined(__COVERITY__) || defined(__clang_analyzer__)
     16 /* If we're running a static analysis tool, we don't want it to complain
     17 * that some of our remaining-bytes checks are dead-code. */
     18 int cellrendezvous_deadcode_dummy__ = 0;
     19 #define OR_DEADCODE_DUMMY || cellrendezvous_deadcode_dummy__
     20 #else
     21 #define OR_DEADCODE_DUMMY
     22 #endif
     23 
     24 #define CHECK_REMAINING(nbytes, label)                           \
     25  do {                                                           \
     26    if (remaining < (nbytes) OR_DEADCODE_DUMMY) {                \
     27      goto label;                                                \
     28    }                                                            \
     29  } while (0)
     30 
     31 trn_cell_rendezvous1_t *
     32 trn_cell_rendezvous1_new(void)
     33 {
     34  trn_cell_rendezvous1_t *val = trunnel_calloc(1, sizeof(trn_cell_rendezvous1_t));
     35  if (NULL == val)
     36    return NULL;
     37  return val;
     38 }
     39 
     40 /** Release all storage held inside 'obj', but do not free 'obj'.
     41 */
     42 static void
     43 trn_cell_rendezvous1_clear(trn_cell_rendezvous1_t *obj)
     44 {
     45  (void) obj;
     46  TRUNNEL_DYNARRAY_WIPE(&obj->handshake_info);
     47  TRUNNEL_DYNARRAY_CLEAR(&obj->handshake_info);
     48 }
     49 
     50 void
     51 trn_cell_rendezvous1_free(trn_cell_rendezvous1_t *obj)
     52 {
     53  if (obj == NULL)
     54    return;
     55  trn_cell_rendezvous1_clear(obj);
     56  trunnel_memwipe(obj, sizeof(trn_cell_rendezvous1_t));
     57  trunnel_free_(obj);
     58 }
     59 
     60 size_t
     61 trn_cell_rendezvous1_getlen_rendezvous_cookie(const trn_cell_rendezvous1_t *inp)
     62 {
     63  (void)inp;  return TRUNNEL_REND_COOKIE_LEN;
     64 }
     65 
     66 uint8_t
     67 trn_cell_rendezvous1_get_rendezvous_cookie(trn_cell_rendezvous1_t *inp, size_t idx)
     68 {
     69  trunnel_assert(idx < TRUNNEL_REND_COOKIE_LEN);
     70  return inp->rendezvous_cookie[idx];
     71 }
     72 
     73 uint8_t
     74 trn_cell_rendezvous1_getconst_rendezvous_cookie(const trn_cell_rendezvous1_t *inp, size_t idx)
     75 {
     76  return trn_cell_rendezvous1_get_rendezvous_cookie((trn_cell_rendezvous1_t*)inp, idx);
     77 }
     78 int
     79 trn_cell_rendezvous1_set_rendezvous_cookie(trn_cell_rendezvous1_t *inp, size_t idx, uint8_t elt)
     80 {
     81  trunnel_assert(idx < TRUNNEL_REND_COOKIE_LEN);
     82  inp->rendezvous_cookie[idx] = elt;
     83  return 0;
     84 }
     85 
     86 uint8_t *
     87 trn_cell_rendezvous1_getarray_rendezvous_cookie(trn_cell_rendezvous1_t *inp)
     88 {
     89  return inp->rendezvous_cookie;
     90 }
     91 const uint8_t  *
     92 trn_cell_rendezvous1_getconstarray_rendezvous_cookie(const trn_cell_rendezvous1_t *inp)
     93 {
     94  return (const uint8_t  *)trn_cell_rendezvous1_getarray_rendezvous_cookie((trn_cell_rendezvous1_t*)inp);
     95 }
     96 size_t
     97 trn_cell_rendezvous1_getlen_handshake_info(const trn_cell_rendezvous1_t *inp)
     98 {
     99  return TRUNNEL_DYNARRAY_LEN(&inp->handshake_info);
    100 }
    101 
    102 uint8_t
    103 trn_cell_rendezvous1_get_handshake_info(trn_cell_rendezvous1_t *inp, size_t idx)
    104 {
    105  return TRUNNEL_DYNARRAY_GET(&inp->handshake_info, idx);
    106 }
    107 
    108 uint8_t
    109 trn_cell_rendezvous1_getconst_handshake_info(const trn_cell_rendezvous1_t *inp, size_t idx)
    110 {
    111  return trn_cell_rendezvous1_get_handshake_info((trn_cell_rendezvous1_t*)inp, idx);
    112 }
    113 int
    114 trn_cell_rendezvous1_set_handshake_info(trn_cell_rendezvous1_t *inp, size_t idx, uint8_t elt)
    115 {
    116  TRUNNEL_DYNARRAY_SET(&inp->handshake_info, idx, elt);
    117  return 0;
    118 }
    119 int
    120 trn_cell_rendezvous1_add_handshake_info(trn_cell_rendezvous1_t *inp, uint8_t elt)
    121 {
    122  TRUNNEL_DYNARRAY_ADD(uint8_t, &inp->handshake_info, elt, {});
    123  return 0;
    124 trunnel_alloc_failed:
    125  TRUNNEL_SET_ERROR_CODE(inp);
    126  return -1;
    127 }
    128 
    129 uint8_t *
    130 trn_cell_rendezvous1_getarray_handshake_info(trn_cell_rendezvous1_t *inp)
    131 {
    132  return inp->handshake_info.elts_;
    133 }
    134 const uint8_t  *
    135 trn_cell_rendezvous1_getconstarray_handshake_info(const trn_cell_rendezvous1_t *inp)
    136 {
    137  return (const uint8_t  *)trn_cell_rendezvous1_getarray_handshake_info((trn_cell_rendezvous1_t*)inp);
    138 }
    139 int
    140 trn_cell_rendezvous1_setlen_handshake_info(trn_cell_rendezvous1_t *inp, size_t newlen)
    141 {
    142  uint8_t *newptr;
    143  newptr = trunnel_dynarray_setlen(&inp->handshake_info.allocated_,
    144                 &inp->handshake_info.n_, inp->handshake_info.elts_, newlen,
    145                 sizeof(inp->handshake_info.elts_[0]), (trunnel_free_fn_t) NULL,
    146                 &inp->trunnel_error_code_);
    147  if (newlen != 0 && newptr == NULL)
    148    goto trunnel_alloc_failed;
    149  inp->handshake_info.elts_ = newptr;
    150  return 0;
    151 trunnel_alloc_failed:
    152  TRUNNEL_SET_ERROR_CODE(inp);
    153  return -1;
    154 }
    155 const char *
    156 trn_cell_rendezvous1_check(const trn_cell_rendezvous1_t *obj)
    157 {
    158  if (obj == NULL)
    159    return "Object was NULL";
    160  if (obj->trunnel_error_code_)
    161    return "A set function failed on this object";
    162  return NULL;
    163 }
    164 
    165 ssize_t
    166 trn_cell_rendezvous1_encoded_len(const trn_cell_rendezvous1_t *obj)
    167 {
    168  ssize_t result = 0;
    169 
    170  if (NULL != trn_cell_rendezvous1_check(obj))
    171     return -1;
    172 
    173 
    174  /* Length of u8 rendezvous_cookie[TRUNNEL_REND_COOKIE_LEN] */
    175  result += TRUNNEL_REND_COOKIE_LEN;
    176 
    177  /* Length of u8 handshake_info[] */
    178  result += TRUNNEL_DYNARRAY_LEN(&obj->handshake_info);
    179  return result;
    180 }
    181 int
    182 trn_cell_rendezvous1_clear_errors(trn_cell_rendezvous1_t *obj)
    183 {
    184  int r = obj->trunnel_error_code_;
    185  obj->trunnel_error_code_ = 0;
    186  return r;
    187 }
    188 ssize_t
    189 trn_cell_rendezvous1_encode(uint8_t *output, const size_t avail, const trn_cell_rendezvous1_t *obj)
    190 {
    191  ssize_t result = 0;
    192  size_t written = 0;
    193  uint8_t *ptr = output;
    194  const char *msg;
    195 #ifdef TRUNNEL_CHECK_ENCODED_LEN
    196  const ssize_t encoded_len = trn_cell_rendezvous1_encoded_len(obj);
    197 #endif
    198 
    199  if (NULL != (msg = trn_cell_rendezvous1_check(obj)))
    200    goto check_failed;
    201 
    202 #ifdef TRUNNEL_CHECK_ENCODED_LEN
    203  trunnel_assert(encoded_len >= 0);
    204 #endif
    205 
    206  /* Encode u8 rendezvous_cookie[TRUNNEL_REND_COOKIE_LEN] */
    207  trunnel_assert(written <= avail);
    208  if (avail - written < TRUNNEL_REND_COOKIE_LEN)
    209    goto truncated;
    210  memcpy(ptr, obj->rendezvous_cookie, TRUNNEL_REND_COOKIE_LEN);
    211  written += TRUNNEL_REND_COOKIE_LEN; ptr += TRUNNEL_REND_COOKIE_LEN;
    212 
    213  /* Encode u8 handshake_info[] */
    214  {
    215    size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->handshake_info);
    216    trunnel_assert(written <= avail);
    217    if (avail - written < elt_len)
    218      goto truncated;
    219    if (elt_len)
    220      memcpy(ptr, obj->handshake_info.elts_, elt_len);
    221    written += elt_len; ptr += elt_len;
    222  }
    223 
    224 
    225  trunnel_assert(ptr == output + written);
    226 #ifdef TRUNNEL_CHECK_ENCODED_LEN
    227  {
    228    trunnel_assert(encoded_len >= 0);
    229    trunnel_assert((size_t)encoded_len == written);
    230  }
    231 
    232 #endif
    233 
    234  return written;
    235 
    236 truncated:
    237  result = -2;
    238  goto fail;
    239 check_failed:
    240  (void)msg;
    241  result = -1;
    242  goto fail;
    243 fail:
    244  trunnel_assert(result < 0);
    245  return result;
    246 }
    247 
    248 /** As trn_cell_rendezvous1_parse(), but do not allocate the output
    249 * object.
    250 */
    251 static ssize_t
    252 trn_cell_rendezvous1_parse_into(trn_cell_rendezvous1_t *obj, const uint8_t *input, const size_t len_in)
    253 {
    254  const uint8_t *ptr = input;
    255  size_t remaining = len_in;
    256  ssize_t result = 0;
    257  (void)result;
    258 
    259  /* Parse u8 rendezvous_cookie[TRUNNEL_REND_COOKIE_LEN] */
    260  CHECK_REMAINING(TRUNNEL_REND_COOKIE_LEN, truncated);
    261  memcpy(obj->rendezvous_cookie, ptr, TRUNNEL_REND_COOKIE_LEN);
    262  remaining -= TRUNNEL_REND_COOKIE_LEN; ptr += TRUNNEL_REND_COOKIE_LEN;
    263 
    264  /* Parse u8 handshake_info[] */
    265  TRUNNEL_DYNARRAY_EXPAND(uint8_t, &obj->handshake_info, remaining, {});
    266  obj->handshake_info.n_ = remaining;
    267  if (remaining)
    268    memcpy(obj->handshake_info.elts_, ptr, remaining);
    269  ptr += remaining; remaining -= remaining;
    270  trunnel_assert(ptr + remaining == input + len_in);
    271  return len_in - remaining;
    272 
    273 truncated:
    274  return -2;
    275 trunnel_alloc_failed:
    276  return -1;
    277 }
    278 
    279 ssize_t
    280 trn_cell_rendezvous1_parse(trn_cell_rendezvous1_t **output, const uint8_t *input, const size_t len_in)
    281 {
    282  ssize_t result;
    283  *output = trn_cell_rendezvous1_new();
    284  if (NULL == *output)
    285    return -1;
    286  result = trn_cell_rendezvous1_parse_into(*output, input, len_in);
    287  if (result < 0) {
    288    trn_cell_rendezvous1_free(*output);
    289    *output = NULL;
    290  }
    291  return result;
    292 }
    293 trn_cell_rendezvous2_t *
    294 trn_cell_rendezvous2_new(void)
    295 {
    296  trn_cell_rendezvous2_t *val = trunnel_calloc(1, sizeof(trn_cell_rendezvous2_t));
    297  if (NULL == val)
    298    return NULL;
    299  return val;
    300 }
    301 
    302 /** Release all storage held inside 'obj', but do not free 'obj'.
    303 */
    304 static void
    305 trn_cell_rendezvous2_clear(trn_cell_rendezvous2_t *obj)
    306 {
    307  (void) obj;
    308 }
    309 
    310 void
    311 trn_cell_rendezvous2_free(trn_cell_rendezvous2_t *obj)
    312 {
    313  if (obj == NULL)
    314    return;
    315  trn_cell_rendezvous2_clear(obj);
    316  trunnel_memwipe(obj, sizeof(trn_cell_rendezvous2_t));
    317  trunnel_free_(obj);
    318 }
    319 
    320 size_t
    321 trn_cell_rendezvous2_getlen_handshake_info(const trn_cell_rendezvous2_t *inp)
    322 {
    323  (void)inp;  return TRUNNEL_HANDSHAKE_INFO_LEN;
    324 }
    325 
    326 uint8_t
    327 trn_cell_rendezvous2_get_handshake_info(trn_cell_rendezvous2_t *inp, size_t idx)
    328 {
    329  trunnel_assert(idx < TRUNNEL_HANDSHAKE_INFO_LEN);
    330  return inp->handshake_info[idx];
    331 }
    332 
    333 uint8_t
    334 trn_cell_rendezvous2_getconst_handshake_info(const trn_cell_rendezvous2_t *inp, size_t idx)
    335 {
    336  return trn_cell_rendezvous2_get_handshake_info((trn_cell_rendezvous2_t*)inp, idx);
    337 }
    338 int
    339 trn_cell_rendezvous2_set_handshake_info(trn_cell_rendezvous2_t *inp, size_t idx, uint8_t elt)
    340 {
    341  trunnel_assert(idx < TRUNNEL_HANDSHAKE_INFO_LEN);
    342  inp->handshake_info[idx] = elt;
    343  return 0;
    344 }
    345 
    346 uint8_t *
    347 trn_cell_rendezvous2_getarray_handshake_info(trn_cell_rendezvous2_t *inp)
    348 {
    349  return inp->handshake_info;
    350 }
    351 const uint8_t  *
    352 trn_cell_rendezvous2_getconstarray_handshake_info(const trn_cell_rendezvous2_t *inp)
    353 {
    354  return (const uint8_t  *)trn_cell_rendezvous2_getarray_handshake_info((trn_cell_rendezvous2_t*)inp);
    355 }
    356 const char *
    357 trn_cell_rendezvous2_check(const trn_cell_rendezvous2_t *obj)
    358 {
    359  if (obj == NULL)
    360    return "Object was NULL";
    361  if (obj->trunnel_error_code_)
    362    return "A set function failed on this object";
    363  return NULL;
    364 }
    365 
    366 ssize_t
    367 trn_cell_rendezvous2_encoded_len(const trn_cell_rendezvous2_t *obj)
    368 {
    369  ssize_t result = 0;
    370 
    371  if (NULL != trn_cell_rendezvous2_check(obj))
    372     return -1;
    373 
    374 
    375  /* Length of u8 handshake_info[TRUNNEL_HANDSHAKE_INFO_LEN] */
    376  result += TRUNNEL_HANDSHAKE_INFO_LEN;
    377  return result;
    378 }
    379 int
    380 trn_cell_rendezvous2_clear_errors(trn_cell_rendezvous2_t *obj)
    381 {
    382  int r = obj->trunnel_error_code_;
    383  obj->trunnel_error_code_ = 0;
    384  return r;
    385 }
    386 ssize_t
    387 trn_cell_rendezvous2_encode(uint8_t *output, const size_t avail, const trn_cell_rendezvous2_t *obj)
    388 {
    389  ssize_t result = 0;
    390  size_t written = 0;
    391  uint8_t *ptr = output;
    392  const char *msg;
    393 #ifdef TRUNNEL_CHECK_ENCODED_LEN
    394  const ssize_t encoded_len = trn_cell_rendezvous2_encoded_len(obj);
    395 #endif
    396 
    397  if (NULL != (msg = trn_cell_rendezvous2_check(obj)))
    398    goto check_failed;
    399 
    400 #ifdef TRUNNEL_CHECK_ENCODED_LEN
    401  trunnel_assert(encoded_len >= 0);
    402 #endif
    403 
    404  /* Encode u8 handshake_info[TRUNNEL_HANDSHAKE_INFO_LEN] */
    405  trunnel_assert(written <= avail);
    406  if (avail - written < TRUNNEL_HANDSHAKE_INFO_LEN)
    407    goto truncated;
    408  memcpy(ptr, obj->handshake_info, TRUNNEL_HANDSHAKE_INFO_LEN);
    409  written += TRUNNEL_HANDSHAKE_INFO_LEN; ptr += TRUNNEL_HANDSHAKE_INFO_LEN;
    410 
    411 
    412  trunnel_assert(ptr == output + written);
    413 #ifdef TRUNNEL_CHECK_ENCODED_LEN
    414  {
    415    trunnel_assert(encoded_len >= 0);
    416    trunnel_assert((size_t)encoded_len == written);
    417  }
    418 
    419 #endif
    420 
    421  return written;
    422 
    423 truncated:
    424  result = -2;
    425  goto fail;
    426 check_failed:
    427  (void)msg;
    428  result = -1;
    429  goto fail;
    430 fail:
    431  trunnel_assert(result < 0);
    432  return result;
    433 }
    434 
    435 /** As trn_cell_rendezvous2_parse(), but do not allocate the output
    436 * object.
    437 */
    438 static ssize_t
    439 trn_cell_rendezvous2_parse_into(trn_cell_rendezvous2_t *obj, const uint8_t *input, const size_t len_in)
    440 {
    441  const uint8_t *ptr = input;
    442  size_t remaining = len_in;
    443  ssize_t result = 0;
    444  (void)result;
    445 
    446  /* Parse u8 handshake_info[TRUNNEL_HANDSHAKE_INFO_LEN] */
    447  CHECK_REMAINING(TRUNNEL_HANDSHAKE_INFO_LEN, truncated);
    448  memcpy(obj->handshake_info, ptr, TRUNNEL_HANDSHAKE_INFO_LEN);
    449  remaining -= TRUNNEL_HANDSHAKE_INFO_LEN; ptr += TRUNNEL_HANDSHAKE_INFO_LEN;
    450  trunnel_assert(ptr + remaining == input + len_in);
    451  return len_in - remaining;
    452 
    453 truncated:
    454  return -2;
    455 }
    456 
    457 ssize_t
    458 trn_cell_rendezvous2_parse(trn_cell_rendezvous2_t **output, const uint8_t *input, const size_t len_in)
    459 {
    460  ssize_t result;
    461  *output = trn_cell_rendezvous2_new();
    462  if (NULL == *output)
    463    return -1;
    464  result = trn_cell_rendezvous2_parse_into(*output, input, len_in);
    465  if (result < 0) {
    466    trn_cell_rendezvous2_free(*output);
    467    *output = NULL;
    468  }
    469  return result;
    470 }