text: /* pwbox.c -- generated by Trunnel v1.4.3.
   * https://gitweb.torproject.org/trunnel.git
   * You probably shouldn't edit this file.
   */
  #include <stdlib.h>
  #include "trunnel-impl.h"
  
  #include "pwbox.h"
  
  #define TRUNNEL_SET_ERROR_CODE(obj) \
    do {                              \
      (obj)->trunnel_error_code_ = 1; \
    } while (0)
  
  #if defined(__COVERITY__) || defined(__clang_analyzer__)
  /* If we're runnning a static analysis tool, we don't want it to complain
   * that some of our remaining-bytes checks are dead-code. */
  int pwbox_deadcode_dummy__ = 0;
  #define OR_DEADCODE_DUMMY || pwbox_deadcode_dummy__
  #else
  #define OR_DEADCODE_DUMMY
  #endif
  
  #define CHECK_REMAINING(nbytes, label)                           \
    do {                                                           \
      if (remaining < (nbytes) OR_DEADCODE_DUMMY) {                \
        goto label;                                                \
      }                                                            \
    } while (0)
  
  pwbox_encoded_t *
  pwbox_encoded_new(void)
  {
    pwbox_encoded_t *val = trunnel_calloc(1, sizeof(pwbox_encoded_t));
    if (NULL == val)
      return NULL;
    val->fixedbytes0 = PWBOX0_CONST0;
    val->fixedbytes1 = PWBOX0_CONST1;
    return val;
  }
  
  /** Release all storage held inside 'obj', but do not free 'obj'.
   */
  static void
  pwbox_encoded_clear(pwbox_encoded_t *obj)
  {
    (void) obj;
    TRUNNEL_DYNARRAY_WIPE(&obj->skey_header);
    TRUNNEL_DYNARRAY_CLEAR(&obj->skey_header);
    TRUNNEL_DYNARRAY_WIPE(&obj->data);
    TRUNNEL_DYNARRAY_CLEAR(&obj->data);
  }
  
  void
  pwbox_encoded_free(pwbox_encoded_t *obj)
  {
    if (obj == NULL)
      return;
    pwbox_encoded_clear(obj);
    trunnel_memwipe(obj, sizeof(pwbox_encoded_t));
    trunnel_free_(obj);
  }
  
  uint32_t
  pwbox_encoded_get_fixedbytes0(pwbox_encoded_t *inp)
  {
    return inp->fixedbytes0;
  }
  int
  pwbox_encoded_set_fixedbytes0(pwbox_encoded_t *inp, uint32_t val)
  {
    if (! ((val == PWBOX0_CONST0))) {
       TRUNNEL_SET_ERROR_CODE(inp);
       return -1;
    }
    inp->fixedbytes0 = val;
    return 0;
  }
  uint32_t
  pwbox_encoded_get_fixedbytes1(pwbox_encoded_t *inp)
  {
    return inp->fixedbytes1;
  }
  int
  pwbox_encoded_set_fixedbytes1(pwbox_encoded_t *inp, uint32_t val)
  {
    if (! ((val == PWBOX0_CONST1))) {
       TRUNNEL_SET_ERROR_CODE(inp);
       return -1;
    }
    inp->fixedbytes1 = val;
    return 0;
  }
  uint8_t
  pwbox_encoded_get_header_len(pwbox_encoded_t *inp)
  {
    return inp->header_len;
  }
  int
  pwbox_encoded_set_header_len(pwbox_encoded_t *inp, uint8_t val)
  {
    inp->header_len = val;
    return 0;
  }
  size_t
  pwbox_encoded_getlen_skey_header(const pwbox_encoded_t *inp)
  {
    return TRUNNEL_DYNARRAY_LEN(&inp->skey_header);
  }
  
  uint8_t
  pwbox_encoded_get_skey_header(pwbox_encoded_t *inp, size_t idx)
  {
    return TRUNNEL_DYNARRAY_GET(&inp->skey_header, idx);
  }
  
  int
  pwbox_encoded_set_skey_header(pwbox_encoded_t *inp, size_t idx, uint8_t elt)
  {
    TRUNNEL_DYNARRAY_SET(&inp->skey_header, idx, elt);
    return 0;
  }
  int
  pwbox_encoded_add_skey_header(pwbox_encoded_t *inp, uint8_t elt)
  {
  #if SIZE_MAX >= UINT8_MAX
    if (inp->skey_header.n_ == UINT8_MAX)
      goto trunnel_alloc_failed;
  #endif
    TRUNNEL_DYNARRAY_ADD(uint8_t, &inp->skey_header, elt, {});
    return 0;
   trunnel_alloc_failed:
    TRUNNEL_SET_ERROR_CODE(inp);
    return -1;
  }
  
  uint8_t *
  pwbox_encoded_getarray_skey_header(pwbox_encoded_t *inp)
  {
    return inp->skey_header.elts_;
  }
  int
  pwbox_encoded_setlen_skey_header(pwbox_encoded_t *inp, size_t newlen)
  {
    uint8_t *newptr;
  #if UINT8_MAX < SIZE_MAX
    if (newlen > UINT8_MAX)
      goto trunnel_alloc_failed;
  #endif
    newptr = trunnel_dynarray_setlen(&inp->skey_header.allocated_,
                   &inp->skey_header.n_, inp->skey_header.elts_, newlen,
                   sizeof(inp->skey_header.elts_[0]), (trunnel_free_fn_t) NULL,
                   &inp->trunnel_error_code_);
    if (newptr == NULL)
      goto trunnel_alloc_failed;
    inp->skey_header.elts_ = newptr;
    return 0;
   trunnel_alloc_failed:
    TRUNNEL_SET_ERROR_CODE(inp);
    return -1;
  }
  size_t
  pwbox_encoded_getlen_iv(const pwbox_encoded_t *inp)
  {
    (void)inp;  return 16;
  }
  
  uint8_t
  pwbox_encoded_get_iv(const pwbox_encoded_t *inp, size_t idx)
  {
    trunnel_assert(idx < 16);
    return inp->iv[idx];
  }
  
  int
  pwbox_encoded_set_iv(pwbox_encoded_t *inp, size_t idx, uint8_t elt)
  {
    trunnel_assert(idx < 16);
    inp->iv[idx] = elt;
    return 0;
  }
  
  uint8_t *
  pwbox_encoded_getarray_iv(pwbox_encoded_t *inp)
  {
    return inp->iv;
  }
  size_t
  pwbox_encoded_getlen_data(const pwbox_encoded_t *inp)
  {
    return TRUNNEL_DYNARRAY_LEN(&inp->data);
  }
  
  uint8_t
  pwbox_encoded_get_data(pwbox_encoded_t *inp, size_t idx)
  {
    return TRUNNEL_DYNARRAY_GET(&inp->data, idx);
  }
  
  int
  pwbox_encoded_set_data(pwbox_encoded_t *inp, size_t idx, uint8_t elt)
  {
    TRUNNEL_DYNARRAY_SET(&inp->data, idx, elt);
    return 0;
  }
  int
  pwbox_encoded_add_data(pwbox_encoded_t *inp, uint8_t elt)
  {
    TRUNNEL_DYNARRAY_ADD(uint8_t, &inp->data, elt, {});
    return 0;
   trunnel_alloc_failed:
    TRUNNEL_SET_ERROR_CODE(inp);
    return -1;
  }
  
  uint8_t *
  pwbox_encoded_getarray_data(pwbox_encoded_t *inp)
  {
    return inp->data.elts_;
  }
  int
  pwbox_encoded_setlen_data(pwbox_encoded_t *inp, size_t newlen)
  {
    uint8_t *newptr;
    newptr = trunnel_dynarray_setlen(&inp->data.allocated_,
                   &inp->data.n_, inp->data.elts_, newlen,
                   sizeof(inp->data.elts_[0]), (trunnel_free_fn_t) NULL,
                   &inp->trunnel_error_code_);
    if (newptr == NULL)
      goto trunnel_alloc_failed;
    inp->data.elts_ = newptr;
    return 0;
   trunnel_alloc_failed:
    TRUNNEL_SET_ERROR_CODE(inp);
    return -1;
  }
  size_t
  pwbox_encoded_getlen_hmac(const pwbox_encoded_t *inp)
  {
    (void)inp;  return 32;
  }
  
  uint8_t
  pwbox_encoded_get_hmac(const pwbox_encoded_t *inp, size_t idx)
  {
    trunnel_assert(idx < 32);
    return inp->hmac[idx];
  }
  
  int
  pwbox_encoded_set_hmac(pwbox_encoded_t *inp, size_t idx, uint8_t elt)
  {
    trunnel_assert(idx < 32);
    inp->hmac[idx] = elt;
    return 0;
  }
  
  uint8_t *
  pwbox_encoded_getarray_hmac(pwbox_encoded_t *inp)
  {
    return inp->hmac;
  }
  const char *
  pwbox_encoded_check(const pwbox_encoded_t *obj)
  {
    if (obj == NULL)
      return "Object was NULL";
    if (obj->trunnel_error_code_)
      return "A set function failed on this object";
    if (! (obj->fixedbytes0 == PWBOX0_CONST0))
      return "Integer out of bounds";
    if (! (obj->fixedbytes1 == PWBOX0_CONST1))
      return "Integer out of bounds";
    if (TRUNNEL_DYNARRAY_LEN(&obj->skey_header) != obj->header_len)
      return "Length mismatch for skey_header";
    return NULL;
  }
  
  ssize_t
  pwbox_encoded_encoded_len(const pwbox_encoded_t *obj)
  {
    ssize_t result = 0;
  
    if (NULL != pwbox_encoded_check(obj))
       return -1;
  
  
    /* Length of u32 fixedbytes0 IN [PWBOX0_CONST0] */
    result += 4;
  
    /* Length of u32 fixedbytes1 IN [PWBOX0_CONST1] */
    result += 4;
  
    /* Length of u8 header_len */
    result += 1;
  
    /* Length of u8 skey_header[header_len] */
    result += TRUNNEL_DYNARRAY_LEN(&obj->skey_header);
  
    /* Length of u8 iv[16] */
    result += 16;
  
    /* Length of u8 data[] */
    result += TRUNNEL_DYNARRAY_LEN(&obj->data);
  
    /* Length of u8 hmac[32] */
    result += 32;
    return result;
  }
  int
  pwbox_encoded_clear_errors(pwbox_encoded_t *obj)
  {
    int r = obj->trunnel_error_code_;
    obj->trunnel_error_code_ = 0;
    return r;
  }
  ssize_t
  pwbox_encoded_encode(uint8_t *output, size_t avail, const pwbox_encoded_t *obj)
  {
    ssize_t result = 0;
    size_t written = 0;
    uint8_t *ptr = output;
    const char *msg;
  #ifdef TRUNNEL_CHECK_ENCODED_LEN
    const ssize_t encoded_len = pwbox_encoded_encoded_len(obj);
  #endif
    int enforce_avail = 0;
    const size_t avail_orig = avail;
  
    if (NULL != (msg = pwbox_encoded_check(obj)))
      goto check_failed;
  
  #ifdef TRUNNEL_CHECK_ENCODED_LEN
    trunnel_assert(encoded_len >= 0);
  #endif
  
    /* Encode u32 fixedbytes0 IN [PWBOX0_CONST0] */
    trunnel_assert(written <= avail);
    if (avail - written < 4)
      goto truncated;
    trunnel_set_uint32(ptr, trunnel_htonl(obj->fixedbytes0));
    written += 4; ptr += 4;
  
    /* Encode u32 fixedbytes1 IN [PWBOX0_CONST1] */
    trunnel_assert(written <= avail);
    if (avail - written < 4)
      goto truncated;
    trunnel_set_uint32(ptr, trunnel_htonl(obj->fixedbytes1));
    written += 4; ptr += 4;
  
    /* Encode u8 header_len */
    trunnel_assert(written <= avail);
    if (avail - written < 1)
      goto truncated;
    trunnel_set_uint8(ptr, (obj->header_len));
    written += 1; ptr += 1;
  
    /* Encode u8 skey_header[header_len] */
    {
      size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->skey_header);
      trunnel_assert(obj->header_len == elt_len);
      trunnel_assert(written <= avail);
      if (avail - written < elt_len)
        goto truncated;
      memcpy(ptr, obj->skey_header.elts_, elt_len);
      written += elt_len; ptr += elt_len;
    }
  
    /* Encode u8 iv[16] */
    trunnel_assert(written <= avail);
    if (avail - written < 16)
      goto truncated;
    memcpy(ptr, obj->iv, 16);
    written += 16; ptr += 16;
    {
  
      /* Encode u8 data[] */
      {
        size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->data);
        trunnel_assert(written <= avail);
        if (avail - written < elt_len)
          goto truncated;
        memcpy(ptr, obj->data.elts_, elt_len);
        written += elt_len; ptr += elt_len;
      }
      trunnel_assert(written <= avail);
      if (avail - written < 32)
        goto truncated;
      avail = written + 32;
      enforce_avail = 1;
    }
  
    /* Encode u8 hmac[32] */
    trunnel_assert(written <= avail);
    if (avail - written < 32) {
      if (avail_orig - written < 32)
        goto truncated;
      else
        goto check_failed;
    }
    memcpy(ptr, obj->hmac, 32);
    written += 32; ptr += 32;
  
  
    trunnel_assert(ptr == output + written);
    if (enforce_avail && avail != written)
      goto check_failed;
  #ifdef TRUNNEL_CHECK_ENCODED_LEN
    {
      trunnel_assert(encoded_len >= 0);
      trunnel_assert((size_t)encoded_len == written);
    }
  
  #endif
  
    return written;
  
   truncated:
    result = -2;
    goto fail;
   check_failed:
    (void)msg;
    result = -1;
    goto fail;
   fail:
    trunnel_assert(result < 0);
    return result;
  }
  
  /** As pwbox_encoded_parse(), but do not allocate the output object.
   */
  static ssize_t
  pwbox_encoded_parse_into(pwbox_encoded_t *obj, const uint8_t *input, const size_t len_in)
  {
    const uint8_t *ptr = input;
    size_t remaining = len_in;
    ssize_t result = 0;
    (void)result;
  
    /* Parse u32 fixedbytes0 IN [PWBOX0_CONST0] */
    CHECK_REMAINING(4, truncated);
    obj->fixedbytes0 = trunnel_ntohl(trunnel_get_uint32(ptr));
    remaining -= 4; ptr += 4;
    if (! (obj->fixedbytes0 == PWBOX0_CONST0))
      goto fail;
  
    /* Parse u32 fixedbytes1 IN [PWBOX0_CONST1] */
    CHECK_REMAINING(4, truncated);
    obj->fixedbytes1 = trunnel_ntohl(trunnel_get_uint32(ptr));
    remaining -= 4; ptr += 4;
    if (! (obj->fixedbytes1 == PWBOX0_CONST1))
      goto fail;
  
    /* Parse u8 header_len */
    CHECK_REMAINING(1, truncated);
    obj->header_len = (trunnel_get_uint8(ptr));
    remaining -= 1; ptr += 1;
  
    /* Parse u8 skey_header[header_len] */
    CHECK_REMAINING(obj->header_len, truncated);
    TRUNNEL_DYNARRAY_EXPAND(uint8_t, &obj->skey_header, obj->header_len, {});
    obj->skey_header.n_ = obj->header_len;
    memcpy(obj->skey_header.elts_, ptr, obj->header_len);
    ptr += obj->header_len; remaining -= obj->header_len;
  
    /* Parse u8 iv[16] */
    CHECK_REMAINING(16, truncated);
    memcpy(obj->iv, ptr, 16);
    remaining -= 16; ptr += 16;
    {
      size_t remaining_after;
      CHECK_REMAINING(32, truncated);
      remaining_after = 32;
      remaining = remaining - 32;
  
      /* Parse u8 data[] */
      TRUNNEL_DYNARRAY_EXPAND(uint8_t, &obj->data, remaining, {});
      obj->data.n_ = remaining;
      memcpy(obj->data.elts_, ptr, remaining);
      ptr += remaining; remaining -= remaining;
      if (remaining != 0)
        goto fail;
      remaining = remaining_after;
    }
  
    /* Parse u8 hmac[32] */
    CHECK_REMAINING(32, truncated);
    memcpy(obj->hmac, ptr, 32);
    remaining -= 32; ptr += 32;
    trunnel_assert(ptr + remaining == input + len_in);
    return len_in - remaining;
  
   truncated:
    return -2;
   trunnel_alloc_failed:
    return -1;
   fail:
    result = -1;
    return result;
  }
  
  ssize_t
  pwbox_encoded_parse(pwbox_encoded_t **output, const uint8_t *input, const size_t len_in)
  {
    ssize_t result;
    *output = pwbox_encoded_new();
    if (NULL == *output)
      return -1;
    result = pwbox_encoded_parse_into(*output, input, len_in);
    if (result < 0) {
      pwbox_encoded_free(*output);
      *output = NULL;
    }
    return result;
  }
  