tor

ed25519_cert.c (66056B)

---

/* ed25519_cert.c -- generated by Trunnel v1.5.3.
* https://gitweb.torproject.org/trunnel.git
* You probably shouldn't edit this file.
*/
#include <stdlib.h>
#include "trunnel-impl.h"

#include "ed25519_cert.h"

#define TRUNNEL_SET_ERROR_CODE(obj) \
 do {                              \
   (obj)->trunnel_error_code_ = 1; \
 } while (0)

#if defined(__COVERITY__) || defined(__clang_analyzer__)
/* If we're running a static analysis tool, we don't want it to complain
* that some of our remaining-bytes checks are dead-code. */
int edcert_deadcode_dummy__ = 0;
#define OR_DEADCODE_DUMMY || edcert_deadcode_dummy__
#else
#define OR_DEADCODE_DUMMY
#endif

#define CHECK_REMAINING(nbytes, label)                           \
 do {                                                           \
   if (remaining < (nbytes) OR_DEADCODE_DUMMY) {                \
     goto label;                                                \
   }                                                            \
 } while (0)

create2_cell_body_t *
create2_cell_body_new(void)
{
 create2_cell_body_t *val = trunnel_calloc(1, sizeof(create2_cell_body_t));
 if (NULL == val)
   return NULL;
 return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
*/
static void
create2_cell_body_clear(create2_cell_body_t *obj)
{
 (void) obj;
 TRUNNEL_DYNARRAY_WIPE(&obj->handshake_data);
 TRUNNEL_DYNARRAY_CLEAR(&obj->handshake_data);
}

void
create2_cell_body_free(create2_cell_body_t *obj)
{
 if (obj == NULL)
   return;
 create2_cell_body_clear(obj);
 trunnel_memwipe(obj, sizeof(create2_cell_body_t));
 trunnel_free_(obj);
}

uint16_t
create2_cell_body_get_handshake_type(const create2_cell_body_t *inp)
{
 return inp->handshake_type;
}
int
create2_cell_body_set_handshake_type(create2_cell_body_t *inp, uint16_t val)
{
 inp->handshake_type = val;
 return 0;
}
uint16_t
create2_cell_body_get_handshake_len(const create2_cell_body_t *inp)
{
 return inp->handshake_len;
}
int
create2_cell_body_set_handshake_len(create2_cell_body_t *inp, uint16_t val)
{
 inp->handshake_len = val;
 return 0;
}
size_t
create2_cell_body_getlen_handshake_data(const create2_cell_body_t *inp)
{
 return TRUNNEL_DYNARRAY_LEN(&inp->handshake_data);
}

uint8_t
create2_cell_body_get_handshake_data(create2_cell_body_t *inp, size_t idx)
{
 return TRUNNEL_DYNARRAY_GET(&inp->handshake_data, idx);
}

uint8_t
create2_cell_body_getconst_handshake_data(const create2_cell_body_t *inp, size_t idx)
{
 return create2_cell_body_get_handshake_data((create2_cell_body_t*)inp, idx);
}
int
create2_cell_body_set_handshake_data(create2_cell_body_t *inp, size_t idx, uint8_t elt)
{
 TRUNNEL_DYNARRAY_SET(&inp->handshake_data, idx, elt);
 return 0;
}
int
create2_cell_body_add_handshake_data(create2_cell_body_t *inp, uint8_t elt)
{
#if SIZE_MAX >= UINT16_MAX
 if (inp->handshake_data.n_ == UINT16_MAX)
   goto trunnel_alloc_failed;
#endif
 TRUNNEL_DYNARRAY_ADD(uint8_t, &inp->handshake_data, elt, {});
 return 0;
trunnel_alloc_failed:
 TRUNNEL_SET_ERROR_CODE(inp);
 return -1;
}

uint8_t *
create2_cell_body_getarray_handshake_data(create2_cell_body_t *inp)
{
 return inp->handshake_data.elts_;
}
const uint8_t  *
create2_cell_body_getconstarray_handshake_data(const create2_cell_body_t *inp)
{
 return (const uint8_t  *)create2_cell_body_getarray_handshake_data((create2_cell_body_t*)inp);
}
int
create2_cell_body_setlen_handshake_data(create2_cell_body_t *inp, size_t newlen)
{
 uint8_t *newptr;
#if UINT16_MAX < SIZE_MAX
 if (newlen > UINT16_MAX)
   goto trunnel_alloc_failed;
#endif
 newptr = trunnel_dynarray_setlen(&inp->handshake_data.allocated_,
                &inp->handshake_data.n_, inp->handshake_data.elts_, newlen,
                sizeof(inp->handshake_data.elts_[0]), (trunnel_free_fn_t) NULL,
                &inp->trunnel_error_code_);
 if (newlen != 0 && newptr == NULL)
   goto trunnel_alloc_failed;
 inp->handshake_data.elts_ = newptr;
 return 0;
trunnel_alloc_failed:
 TRUNNEL_SET_ERROR_CODE(inp);
 return -1;
}
const char *
create2_cell_body_check(const create2_cell_body_t *obj)
{
 if (obj == NULL)
   return "Object was NULL";
 if (obj->trunnel_error_code_)
   return "A set function failed on this object";
 if (TRUNNEL_DYNARRAY_LEN(&obj->handshake_data) != obj->handshake_len)
   return "Length mismatch for handshake_data";
 return NULL;
}

ssize_t
create2_cell_body_encoded_len(const create2_cell_body_t *obj)
{
 ssize_t result = 0;

 if (NULL != create2_cell_body_check(obj))
    return -1;


 /* Length of u16 handshake_type */
 result += 2;

 /* Length of u16 handshake_len */
 result += 2;

 /* Length of u8 handshake_data[handshake_len] */
 result += TRUNNEL_DYNARRAY_LEN(&obj->handshake_data);
 return result;
}
int
create2_cell_body_clear_errors(create2_cell_body_t *obj)
{
 int r = obj->trunnel_error_code_;
 obj->trunnel_error_code_ = 0;
 return r;
}
ssize_t
create2_cell_body_encode(uint8_t *output, const size_t avail, const create2_cell_body_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 = create2_cell_body_encoded_len(obj);
#endif

 if (NULL != (msg = create2_cell_body_check(obj)))
   goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
 trunnel_assert(encoded_len >= 0);
#endif

 /* Encode u16 handshake_type */
 trunnel_assert(written <= avail);
 if (avail - written < 2)
   goto truncated;
 trunnel_set_uint16(ptr, trunnel_htons(obj->handshake_type));
 written += 2; ptr += 2;

 /* Encode u16 handshake_len */
 trunnel_assert(written <= avail);
 if (avail - written < 2)
   goto truncated;
 trunnel_set_uint16(ptr, trunnel_htons(obj->handshake_len));
 written += 2; ptr += 2;

 /* Encode u8 handshake_data[handshake_len] */
 {
   size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->handshake_data);
   trunnel_assert(obj->handshake_len == elt_len);
   trunnel_assert(written <= avail);
   if (avail - written < elt_len)
     goto truncated;
   if (elt_len)
     memcpy(ptr, obj->handshake_data.elts_, elt_len);
   written += elt_len; ptr += elt_len;
 }


 trunnel_assert(ptr == output + written);
#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 create2_cell_body_parse(), but do not allocate the output
* object.
*/
static ssize_t
create2_cell_body_parse_into(create2_cell_body_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 u16 handshake_type */
 CHECK_REMAINING(2, truncated);
 obj->handshake_type = trunnel_ntohs(trunnel_get_uint16(ptr));
 remaining -= 2; ptr += 2;

 /* Parse u16 handshake_len */
 CHECK_REMAINING(2, truncated);
 obj->handshake_len = trunnel_ntohs(trunnel_get_uint16(ptr));
 remaining -= 2; ptr += 2;

 /* Parse u8 handshake_data[handshake_len] */
 CHECK_REMAINING(obj->handshake_len, truncated);
 TRUNNEL_DYNARRAY_EXPAND(uint8_t, &obj->handshake_data, obj->handshake_len, {});
 obj->handshake_data.n_ = obj->handshake_len;
 if (obj->handshake_len)
   memcpy(obj->handshake_data.elts_, ptr, obj->handshake_len);
 ptr += obj->handshake_len; remaining -= obj->handshake_len;
 trunnel_assert(ptr + remaining == input + len_in);
 return len_in - remaining;

truncated:
 return -2;
trunnel_alloc_failed:
 return -1;
}

ssize_t
create2_cell_body_parse(create2_cell_body_t **output, const uint8_t *input, const size_t len_in)
{
 ssize_t result;
 *output = create2_cell_body_new();
 if (NULL == *output)
   return -1;
 result = create2_cell_body_parse_into(*output, input, len_in);
 if (result < 0) {
   create2_cell_body_free(*output);
   *output = NULL;
 }
 return result;
}
ed25519_cert_extension_t *
ed25519_cert_extension_new(void)
{
 ed25519_cert_extension_t *val = trunnel_calloc(1, sizeof(ed25519_cert_extension_t));
 if (NULL == val)
   return NULL;
 return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
*/
static void
ed25519_cert_extension_clear(ed25519_cert_extension_t *obj)
{
 (void) obj;
 TRUNNEL_DYNARRAY_WIPE(&obj->un_unparsed);
 TRUNNEL_DYNARRAY_CLEAR(&obj->un_unparsed);
}

void
ed25519_cert_extension_free(ed25519_cert_extension_t *obj)
{
 if (obj == NULL)
   return;
 ed25519_cert_extension_clear(obj);
 trunnel_memwipe(obj, sizeof(ed25519_cert_extension_t));
 trunnel_free_(obj);
}

uint16_t
ed25519_cert_extension_get_ext_length(const ed25519_cert_extension_t *inp)
{
 return inp->ext_length;
}
int
ed25519_cert_extension_set_ext_length(ed25519_cert_extension_t *inp, uint16_t val)
{
 inp->ext_length = val;
 return 0;
}
uint8_t
ed25519_cert_extension_get_ext_type(const ed25519_cert_extension_t *inp)
{
 return inp->ext_type;
}
int
ed25519_cert_extension_set_ext_type(ed25519_cert_extension_t *inp, uint8_t val)
{
 inp->ext_type = val;
 return 0;
}
uint8_t
ed25519_cert_extension_get_ext_flags(const ed25519_cert_extension_t *inp)
{
 return inp->ext_flags;
}
int
ed25519_cert_extension_set_ext_flags(ed25519_cert_extension_t *inp, uint8_t val)
{
 inp->ext_flags = val;
 return 0;
}
size_t
ed25519_cert_extension_getlen_un_signing_key(const ed25519_cert_extension_t *inp)
{
 (void)inp;  return 32;
}

uint8_t
ed25519_cert_extension_get_un_signing_key(ed25519_cert_extension_t *inp, size_t idx)
{
 trunnel_assert(idx < 32);
 return inp->un_signing_key[idx];
}

uint8_t
ed25519_cert_extension_getconst_un_signing_key(const ed25519_cert_extension_t *inp, size_t idx)
{
 return ed25519_cert_extension_get_un_signing_key((ed25519_cert_extension_t*)inp, idx);
}
int
ed25519_cert_extension_set_un_signing_key(ed25519_cert_extension_t *inp, size_t idx, uint8_t elt)
{
 trunnel_assert(idx < 32);
 inp->un_signing_key[idx] = elt;
 return 0;
}

uint8_t *
ed25519_cert_extension_getarray_un_signing_key(ed25519_cert_extension_t *inp)
{
 return inp->un_signing_key;
}
const uint8_t  *
ed25519_cert_extension_getconstarray_un_signing_key(const ed25519_cert_extension_t *inp)
{
 return (const uint8_t  *)ed25519_cert_extension_getarray_un_signing_key((ed25519_cert_extension_t*)inp);
}
size_t
ed25519_cert_extension_getlen_un_unparsed(const ed25519_cert_extension_t *inp)
{
 return TRUNNEL_DYNARRAY_LEN(&inp->un_unparsed);
}

uint8_t
ed25519_cert_extension_get_un_unparsed(ed25519_cert_extension_t *inp, size_t idx)
{
 return TRUNNEL_DYNARRAY_GET(&inp->un_unparsed, idx);
}

uint8_t
ed25519_cert_extension_getconst_un_unparsed(const ed25519_cert_extension_t *inp, size_t idx)
{
 return ed25519_cert_extension_get_un_unparsed((ed25519_cert_extension_t*)inp, idx);
}
int
ed25519_cert_extension_set_un_unparsed(ed25519_cert_extension_t *inp, size_t idx, uint8_t elt)
{
 TRUNNEL_DYNARRAY_SET(&inp->un_unparsed, idx, elt);
 return 0;
}
int
ed25519_cert_extension_add_un_unparsed(ed25519_cert_extension_t *inp, uint8_t elt)
{
 TRUNNEL_DYNARRAY_ADD(uint8_t, &inp->un_unparsed, elt, {});
 return 0;
trunnel_alloc_failed:
 TRUNNEL_SET_ERROR_CODE(inp);
 return -1;
}

uint8_t *
ed25519_cert_extension_getarray_un_unparsed(ed25519_cert_extension_t *inp)
{
 return inp->un_unparsed.elts_;
}
const uint8_t  *
ed25519_cert_extension_getconstarray_un_unparsed(const ed25519_cert_extension_t *inp)
{
 return (const uint8_t  *)ed25519_cert_extension_getarray_un_unparsed((ed25519_cert_extension_t*)inp);
}
int
ed25519_cert_extension_setlen_un_unparsed(ed25519_cert_extension_t *inp, size_t newlen)
{
 uint8_t *newptr;
 newptr = trunnel_dynarray_setlen(&inp->un_unparsed.allocated_,
                &inp->un_unparsed.n_, inp->un_unparsed.elts_, newlen,
                sizeof(inp->un_unparsed.elts_[0]), (trunnel_free_fn_t) NULL,
                &inp->trunnel_error_code_);
 if (newlen != 0 && newptr == NULL)
   goto trunnel_alloc_failed;
 inp->un_unparsed.elts_ = newptr;
 return 0;
trunnel_alloc_failed:
 TRUNNEL_SET_ERROR_CODE(inp);
 return -1;
}
const char *
ed25519_cert_extension_check(const ed25519_cert_extension_t *obj)
{
 if (obj == NULL)
   return "Object was NULL";
 if (obj->trunnel_error_code_)
   return "A set function failed on this object";
 switch (obj->ext_type) {

   case CERTEXT_SIGNED_WITH_KEY:
     break;

   default:
     break;
 }
 return NULL;
}

ssize_t
ed25519_cert_extension_encoded_len(const ed25519_cert_extension_t *obj)
{
 ssize_t result = 0;

 if (NULL != ed25519_cert_extension_check(obj))
    return -1;


 /* Length of u16 ext_length */
 result += 2;

 /* Length of u8 ext_type */
 result += 1;

 /* Length of u8 ext_flags */
 result += 1;
 switch (obj->ext_type) {

   case CERTEXT_SIGNED_WITH_KEY:

     /* Length of u8 un_signing_key[32] */
     result += 32;
     break;

   default:

     /* Length of u8 un_unparsed[] */
     result += TRUNNEL_DYNARRAY_LEN(&obj->un_unparsed);
     break;
 }
 return result;
}
int
ed25519_cert_extension_clear_errors(ed25519_cert_extension_t *obj)
{
 int r = obj->trunnel_error_code_;
 obj->trunnel_error_code_ = 0;
 return r;
}
ssize_t
ed25519_cert_extension_encode(uint8_t *output, const size_t avail, const ed25519_cert_extension_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 = ed25519_cert_extension_encoded_len(obj);
#endif

 uint8_t *backptr_ext_length = NULL;

 if (NULL != (msg = ed25519_cert_extension_check(obj)))
   goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
 trunnel_assert(encoded_len >= 0);
#endif

 /* Encode u16 ext_length */
 backptr_ext_length = ptr;
 trunnel_assert(written <= avail);
 if (avail - written < 2)
   goto truncated;
 trunnel_set_uint16(ptr, trunnel_htons(obj->ext_length));
 written += 2; ptr += 2;

 /* Encode u8 ext_type */
 trunnel_assert(written <= avail);
 if (avail - written < 1)
   goto truncated;
 trunnel_set_uint8(ptr, (obj->ext_type));
 written += 1; ptr += 1;

 /* Encode u8 ext_flags */
 trunnel_assert(written <= avail);
 if (avail - written < 1)
   goto truncated;
 trunnel_set_uint8(ptr, (obj->ext_flags));
 written += 1; ptr += 1;
 {
   size_t written_before_union = written;

   /* Encode union un[ext_type] */
   trunnel_assert(written <= avail);
   switch (obj->ext_type) {

     case CERTEXT_SIGNED_WITH_KEY:

       /* Encode u8 un_signing_key[32] */
       trunnel_assert(written <= avail);
       if (avail - written < 32)
         goto truncated;
       memcpy(ptr, obj->un_signing_key, 32);
       written += 32; ptr += 32;
       break;

     default:

       /* Encode u8 un_unparsed[] */
       {
         size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->un_unparsed);
         trunnel_assert(written <= avail);
         if (avail - written < elt_len)
           goto truncated;
         if (elt_len)
           memcpy(ptr, obj->un_unparsed.elts_, elt_len);
         written += elt_len; ptr += elt_len;
       }
       break;
   }
   /* Write the length field back to ext_length */
   trunnel_assert(written >= written_before_union);
#if UINT16_MAX < SIZE_MAX
   if (written - written_before_union > UINT16_MAX)
     goto check_failed;
#endif
   trunnel_set_uint16(backptr_ext_length, trunnel_htons(written - written_before_union));
 }


 trunnel_assert(ptr == output + written);
#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 ed25519_cert_extension_parse(), but do not allocate the output
* object.
*/
static ssize_t
ed25519_cert_extension_parse_into(ed25519_cert_extension_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 u16 ext_length */
 CHECK_REMAINING(2, truncated);
 obj->ext_length = trunnel_ntohs(trunnel_get_uint16(ptr));
 remaining -= 2; ptr += 2;

 /* Parse u8 ext_type */
 CHECK_REMAINING(1, truncated);
 obj->ext_type = (trunnel_get_uint8(ptr));
 remaining -= 1; ptr += 1;

 /* Parse u8 ext_flags */
 CHECK_REMAINING(1, truncated);
 obj->ext_flags = (trunnel_get_uint8(ptr));
 remaining -= 1; ptr += 1;
 {
   size_t remaining_after;
   CHECK_REMAINING(obj->ext_length, truncated);
   remaining_after = remaining - obj->ext_length;
   remaining = obj->ext_length;

   /* Parse union un[ext_type] */
   switch (obj->ext_type) {

     case CERTEXT_SIGNED_WITH_KEY:

       /* Parse u8 un_signing_key[32] */
       CHECK_REMAINING(32, fail);
       memcpy(obj->un_signing_key, ptr, 32);
       remaining -= 32; ptr += 32;
       break;

     default:

       /* Parse u8 un_unparsed[] */
       TRUNNEL_DYNARRAY_EXPAND(uint8_t, &obj->un_unparsed, remaining, {});
       obj->un_unparsed.n_ = remaining;
       if (remaining)
         memcpy(obj->un_unparsed.elts_, ptr, remaining);
       ptr += remaining; remaining -= remaining;
       break;
   }
   if (remaining != 0)
     goto fail;
   remaining = remaining_after;
 }
 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
ed25519_cert_extension_parse(ed25519_cert_extension_t **output, const uint8_t *input, const size_t len_in)
{
 ssize_t result;
 *output = ed25519_cert_extension_new();
 if (NULL == *output)
   return -1;
 result = ed25519_cert_extension_parse_into(*output, input, len_in);
 if (result < 0) {
   ed25519_cert_extension_free(*output);
   *output = NULL;
 }
 return result;
}
extend1_cell_body_t *
extend1_cell_body_new(void)
{
 extend1_cell_body_t *val = trunnel_calloc(1, sizeof(extend1_cell_body_t));
 if (NULL == val)
   return NULL;
 return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
*/
static void
extend1_cell_body_clear(extend1_cell_body_t *obj)
{
 (void) obj;
}

void
extend1_cell_body_free(extend1_cell_body_t *obj)
{
 if (obj == NULL)
   return;
 extend1_cell_body_clear(obj);
 trunnel_memwipe(obj, sizeof(extend1_cell_body_t));
 trunnel_free_(obj);
}

uint32_t
extend1_cell_body_get_ipv4addr(const extend1_cell_body_t *inp)
{
 return inp->ipv4addr;
}
int
extend1_cell_body_set_ipv4addr(extend1_cell_body_t *inp, uint32_t val)
{
 inp->ipv4addr = val;
 return 0;
}
uint16_t
extend1_cell_body_get_port(const extend1_cell_body_t *inp)
{
 return inp->port;
}
int
extend1_cell_body_set_port(extend1_cell_body_t *inp, uint16_t val)
{
 inp->port = val;
 return 0;
}
size_t
extend1_cell_body_getlen_onionskin(const extend1_cell_body_t *inp)
{
 (void)inp;  return 186;
}

uint8_t
extend1_cell_body_get_onionskin(extend1_cell_body_t *inp, size_t idx)
{
 trunnel_assert(idx < 186);
 return inp->onionskin[idx];
}

uint8_t
extend1_cell_body_getconst_onionskin(const extend1_cell_body_t *inp, size_t idx)
{
 return extend1_cell_body_get_onionskin((extend1_cell_body_t*)inp, idx);
}
int
extend1_cell_body_set_onionskin(extend1_cell_body_t *inp, size_t idx, uint8_t elt)
{
 trunnel_assert(idx < 186);
 inp->onionskin[idx] = elt;
 return 0;
}

uint8_t *
extend1_cell_body_getarray_onionskin(extend1_cell_body_t *inp)
{
 return inp->onionskin;
}
const uint8_t  *
extend1_cell_body_getconstarray_onionskin(const extend1_cell_body_t *inp)
{
 return (const uint8_t  *)extend1_cell_body_getarray_onionskin((extend1_cell_body_t*)inp);
}
size_t
extend1_cell_body_getlen_identity(const extend1_cell_body_t *inp)
{
 (void)inp;  return 20;
}

uint8_t
extend1_cell_body_get_identity(extend1_cell_body_t *inp, size_t idx)
{
 trunnel_assert(idx < 20);
 return inp->identity[idx];
}

uint8_t
extend1_cell_body_getconst_identity(const extend1_cell_body_t *inp, size_t idx)
{
 return extend1_cell_body_get_identity((extend1_cell_body_t*)inp, idx);
}
int
extend1_cell_body_set_identity(extend1_cell_body_t *inp, size_t idx, uint8_t elt)
{
 trunnel_assert(idx < 20);
 inp->identity[idx] = elt;
 return 0;
}

uint8_t *
extend1_cell_body_getarray_identity(extend1_cell_body_t *inp)
{
 return inp->identity;
}
const uint8_t  *
extend1_cell_body_getconstarray_identity(const extend1_cell_body_t *inp)
{
 return (const uint8_t  *)extend1_cell_body_getarray_identity((extend1_cell_body_t*)inp);
}
const char *
extend1_cell_body_check(const extend1_cell_body_t *obj)
{
 if (obj == NULL)
   return "Object was NULL";
 if (obj->trunnel_error_code_)
   return "A set function failed on this object";
 return NULL;
}

ssize_t
extend1_cell_body_encoded_len(const extend1_cell_body_t *obj)
{
 ssize_t result = 0;

 if (NULL != extend1_cell_body_check(obj))
    return -1;


 /* Length of u32 ipv4addr */
 result += 4;

 /* Length of u16 port */
 result += 2;

 /* Length of u8 onionskin[186] */
 result += 186;

 /* Length of u8 identity[20] */
 result += 20;
 return result;
}
int
extend1_cell_body_clear_errors(extend1_cell_body_t *obj)
{
 int r = obj->trunnel_error_code_;
 obj->trunnel_error_code_ = 0;
 return r;
}
ssize_t
extend1_cell_body_encode(uint8_t *output, const size_t avail, const extend1_cell_body_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 = extend1_cell_body_encoded_len(obj);
#endif

 if (NULL != (msg = extend1_cell_body_check(obj)))
   goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
 trunnel_assert(encoded_len >= 0);
#endif

 /* Encode u32 ipv4addr */
 trunnel_assert(written <= avail);
 if (avail - written < 4)
   goto truncated;
 trunnel_set_uint32(ptr, trunnel_htonl(obj->ipv4addr));
 written += 4; ptr += 4;

 /* Encode u16 port */
 trunnel_assert(written <= avail);
 if (avail - written < 2)
   goto truncated;
 trunnel_set_uint16(ptr, trunnel_htons(obj->port));
 written += 2; ptr += 2;

 /* Encode u8 onionskin[186] */
 trunnel_assert(written <= avail);
 if (avail - written < 186)
   goto truncated;
 memcpy(ptr, obj->onionskin, 186);
 written += 186; ptr += 186;

 /* Encode u8 identity[20] */
 trunnel_assert(written <= avail);
 if (avail - written < 20)
   goto truncated;
 memcpy(ptr, obj->identity, 20);
 written += 20; ptr += 20;


 trunnel_assert(ptr == output + written);
#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 extend1_cell_body_parse(), but do not allocate the output
* object.
*/
static ssize_t
extend1_cell_body_parse_into(extend1_cell_body_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 ipv4addr */
 CHECK_REMAINING(4, truncated);
 obj->ipv4addr = trunnel_ntohl(trunnel_get_uint32(ptr));
 remaining -= 4; ptr += 4;

 /* Parse u16 port */
 CHECK_REMAINING(2, truncated);
 obj->port = trunnel_ntohs(trunnel_get_uint16(ptr));
 remaining -= 2; ptr += 2;

 /* Parse u8 onionskin[186] */
 CHECK_REMAINING(186, truncated);
 memcpy(obj->onionskin, ptr, 186);
 remaining -= 186; ptr += 186;

 /* Parse u8 identity[20] */
 CHECK_REMAINING(20, truncated);
 memcpy(obj->identity, ptr, 20);
 remaining -= 20; ptr += 20;
 trunnel_assert(ptr + remaining == input + len_in);
 return len_in - remaining;

truncated:
 return -2;
}

ssize_t
extend1_cell_body_parse(extend1_cell_body_t **output, const uint8_t *input, const size_t len_in)
{
 ssize_t result;
 *output = extend1_cell_body_new();
 if (NULL == *output)
   return -1;
 result = extend1_cell_body_parse_into(*output, input, len_in);
 if (result < 0) {
   extend1_cell_body_free(*output);
   *output = NULL;
 }
 return result;
}
link_specifier_t *
link_specifier_new(void)
{
 link_specifier_t *val = trunnel_calloc(1, sizeof(link_specifier_t));
 if (NULL == val)
   return NULL;
 return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
*/
static void
link_specifier_clear(link_specifier_t *obj)
{
 (void) obj;
 TRUNNEL_DYNARRAY_WIPE(&obj->un_unrecognized);
 TRUNNEL_DYNARRAY_CLEAR(&obj->un_unrecognized);
}

void
link_specifier_free(link_specifier_t *obj)
{
 if (obj == NULL)
   return;
 link_specifier_clear(obj);
 trunnel_memwipe(obj, sizeof(link_specifier_t));
 trunnel_free_(obj);
}

uint8_t
link_specifier_get_ls_type(const link_specifier_t *inp)
{
 return inp->ls_type;
}
int
link_specifier_set_ls_type(link_specifier_t *inp, uint8_t val)
{
 inp->ls_type = val;
 return 0;
}
uint8_t
link_specifier_get_ls_len(const link_specifier_t *inp)
{
 return inp->ls_len;
}
int
link_specifier_set_ls_len(link_specifier_t *inp, uint8_t val)
{
 inp->ls_len = val;
 return 0;
}
uint32_t
link_specifier_get_un_ipv4_addr(const link_specifier_t *inp)
{
 return inp->un_ipv4_addr;
}
int
link_specifier_set_un_ipv4_addr(link_specifier_t *inp, uint32_t val)
{
 inp->un_ipv4_addr = val;
 return 0;
}
uint16_t
link_specifier_get_un_ipv4_port(const link_specifier_t *inp)
{
 return inp->un_ipv4_port;
}
int
link_specifier_set_un_ipv4_port(link_specifier_t *inp, uint16_t val)
{
 inp->un_ipv4_port = val;
 return 0;
}
size_t
link_specifier_getlen_un_ipv6_addr(const link_specifier_t *inp)
{
 (void)inp;  return 16;
}

uint8_t
link_specifier_get_un_ipv6_addr(link_specifier_t *inp, size_t idx)
{
 trunnel_assert(idx < 16);
 return inp->un_ipv6_addr[idx];
}

uint8_t
link_specifier_getconst_un_ipv6_addr(const link_specifier_t *inp, size_t idx)
{
 return link_specifier_get_un_ipv6_addr((link_specifier_t*)inp, idx);
}
int
link_specifier_set_un_ipv6_addr(link_specifier_t *inp, size_t idx, uint8_t elt)
{
 trunnel_assert(idx < 16);
 inp->un_ipv6_addr[idx] = elt;
 return 0;
}

uint8_t *
link_specifier_getarray_un_ipv6_addr(link_specifier_t *inp)
{
 return inp->un_ipv6_addr;
}
const uint8_t  *
link_specifier_getconstarray_un_ipv6_addr(const link_specifier_t *inp)
{
 return (const uint8_t  *)link_specifier_getarray_un_ipv6_addr((link_specifier_t*)inp);
}
uint16_t
link_specifier_get_un_ipv6_port(const link_specifier_t *inp)
{
 return inp->un_ipv6_port;
}
int
link_specifier_set_un_ipv6_port(link_specifier_t *inp, uint16_t val)
{
 inp->un_ipv6_port = val;
 return 0;
}
size_t
link_specifier_getlen_un_legacy_id(const link_specifier_t *inp)
{
 (void)inp;  return 20;
}

uint8_t
link_specifier_get_un_legacy_id(link_specifier_t *inp, size_t idx)
{
 trunnel_assert(idx < 20);
 return inp->un_legacy_id[idx];
}

uint8_t
link_specifier_getconst_un_legacy_id(const link_specifier_t *inp, size_t idx)
{
 return link_specifier_get_un_legacy_id((link_specifier_t*)inp, idx);
}
int
link_specifier_set_un_legacy_id(link_specifier_t *inp, size_t idx, uint8_t elt)
{
 trunnel_assert(idx < 20);
 inp->un_legacy_id[idx] = elt;
 return 0;
}

uint8_t *
link_specifier_getarray_un_legacy_id(link_specifier_t *inp)
{
 return inp->un_legacy_id;
}
const uint8_t  *
link_specifier_getconstarray_un_legacy_id(const link_specifier_t *inp)
{
 return (const uint8_t  *)link_specifier_getarray_un_legacy_id((link_specifier_t*)inp);
}
size_t
link_specifier_getlen_un_ed25519_id(const link_specifier_t *inp)
{
 (void)inp;  return 32;
}

uint8_t
link_specifier_get_un_ed25519_id(link_specifier_t *inp, size_t idx)
{
 trunnel_assert(idx < 32);
 return inp->un_ed25519_id[idx];
}

uint8_t
link_specifier_getconst_un_ed25519_id(const link_specifier_t *inp, size_t idx)
{
 return link_specifier_get_un_ed25519_id((link_specifier_t*)inp, idx);
}
int
link_specifier_set_un_ed25519_id(link_specifier_t *inp, size_t idx, uint8_t elt)
{
 trunnel_assert(idx < 32);
 inp->un_ed25519_id[idx] = elt;
 return 0;
}

uint8_t *
link_specifier_getarray_un_ed25519_id(link_specifier_t *inp)
{
 return inp->un_ed25519_id;
}
const uint8_t  *
link_specifier_getconstarray_un_ed25519_id(const link_specifier_t *inp)
{
 return (const uint8_t  *)link_specifier_getarray_un_ed25519_id((link_specifier_t*)inp);
}
size_t
link_specifier_getlen_un_unrecognized(const link_specifier_t *inp)
{
 return TRUNNEL_DYNARRAY_LEN(&inp->un_unrecognized);
}

uint8_t
link_specifier_get_un_unrecognized(link_specifier_t *inp, size_t idx)
{
 return TRUNNEL_DYNARRAY_GET(&inp->un_unrecognized, idx);
}

uint8_t
link_specifier_getconst_un_unrecognized(const link_specifier_t *inp, size_t idx)
{
 return link_specifier_get_un_unrecognized((link_specifier_t*)inp, idx);
}
int
link_specifier_set_un_unrecognized(link_specifier_t *inp, size_t idx, uint8_t elt)
{
 TRUNNEL_DYNARRAY_SET(&inp->un_unrecognized, idx, elt);
 return 0;
}
int
link_specifier_add_un_unrecognized(link_specifier_t *inp, uint8_t elt)
{
 TRUNNEL_DYNARRAY_ADD(uint8_t, &inp->un_unrecognized, elt, {});
 return 0;
trunnel_alloc_failed:
 TRUNNEL_SET_ERROR_CODE(inp);
 return -1;
}

uint8_t *
link_specifier_getarray_un_unrecognized(link_specifier_t *inp)
{
 return inp->un_unrecognized.elts_;
}
const uint8_t  *
link_specifier_getconstarray_un_unrecognized(const link_specifier_t *inp)
{
 return (const uint8_t  *)link_specifier_getarray_un_unrecognized((link_specifier_t*)inp);
}
int
link_specifier_setlen_un_unrecognized(link_specifier_t *inp, size_t newlen)
{
 uint8_t *newptr;
 newptr = trunnel_dynarray_setlen(&inp->un_unrecognized.allocated_,
                &inp->un_unrecognized.n_, inp->un_unrecognized.elts_, newlen,
                sizeof(inp->un_unrecognized.elts_[0]), (trunnel_free_fn_t) NULL,
                &inp->trunnel_error_code_);
 if (newlen != 0 && newptr == NULL)
   goto trunnel_alloc_failed;
 inp->un_unrecognized.elts_ = newptr;
 return 0;
trunnel_alloc_failed:
 TRUNNEL_SET_ERROR_CODE(inp);
 return -1;
}
const char *
link_specifier_check(const link_specifier_t *obj)
{
 if (obj == NULL)
   return "Object was NULL";
 if (obj->trunnel_error_code_)
   return "A set function failed on this object";
 switch (obj->ls_type) {

   case LS_IPV4:
     break;

   case LS_IPV6:
     break;

   case LS_LEGACY_ID:
     break;

   case LS_ED25519_ID:
     break;

   default:
     break;
 }
 return NULL;
}

ssize_t
link_specifier_encoded_len(const link_specifier_t *obj)
{
 ssize_t result = 0;

 if (NULL != link_specifier_check(obj))
    return -1;


 /* Length of u8 ls_type */
 result += 1;

 /* Length of u8 ls_len */
 result += 1;
 switch (obj->ls_type) {

   case LS_IPV4:

     /* Length of u32 un_ipv4_addr */
     result += 4;

     /* Length of u16 un_ipv4_port */
     result += 2;
     break;

   case LS_IPV6:

     /* Length of u8 un_ipv6_addr[16] */
     result += 16;

     /* Length of u16 un_ipv6_port */
     result += 2;
     break;

   case LS_LEGACY_ID:

     /* Length of u8 un_legacy_id[20] */
     result += 20;
     break;

   case LS_ED25519_ID:

     /* Length of u8 un_ed25519_id[32] */
     result += 32;
     break;

   default:

     /* Length of u8 un_unrecognized[] */
     result += TRUNNEL_DYNARRAY_LEN(&obj->un_unrecognized);
     break;
 }
 return result;
}
int
link_specifier_clear_errors(link_specifier_t *obj)
{
 int r = obj->trunnel_error_code_;
 obj->trunnel_error_code_ = 0;
 return r;
}
ssize_t
link_specifier_encode(uint8_t *output, const size_t avail, const link_specifier_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 = link_specifier_encoded_len(obj);
#endif

 uint8_t *backptr_ls_len = NULL;

 if (NULL != (msg = link_specifier_check(obj)))
   goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
 trunnel_assert(encoded_len >= 0);
#endif

 /* Encode u8 ls_type */
 trunnel_assert(written <= avail);
 if (avail - written < 1)
   goto truncated;
 trunnel_set_uint8(ptr, (obj->ls_type));
 written += 1; ptr += 1;

 /* Encode u8 ls_len */
 backptr_ls_len = ptr;
 trunnel_assert(written <= avail);
 if (avail - written < 1)
   goto truncated;
 trunnel_set_uint8(ptr, (obj->ls_len));
 written += 1; ptr += 1;
 {
   size_t written_before_union = written;

   /* Encode union un[ls_type] */
   trunnel_assert(written <= avail);
   switch (obj->ls_type) {

     case LS_IPV4:

       /* Encode u32 un_ipv4_addr */
       trunnel_assert(written <= avail);
       if (avail - written < 4)
         goto truncated;
       trunnel_set_uint32(ptr, trunnel_htonl(obj->un_ipv4_addr));
       written += 4; ptr += 4;

       /* Encode u16 un_ipv4_port */
       trunnel_assert(written <= avail);
       if (avail - written < 2)
         goto truncated;
       trunnel_set_uint16(ptr, trunnel_htons(obj->un_ipv4_port));
       written += 2; ptr += 2;
       break;

     case LS_IPV6:

       /* Encode u8 un_ipv6_addr[16] */
       trunnel_assert(written <= avail);
       if (avail - written < 16)
         goto truncated;
       memcpy(ptr, obj->un_ipv6_addr, 16);
       written += 16; ptr += 16;

       /* Encode u16 un_ipv6_port */
       trunnel_assert(written <= avail);
       if (avail - written < 2)
         goto truncated;
       trunnel_set_uint16(ptr, trunnel_htons(obj->un_ipv6_port));
       written += 2; ptr += 2;
       break;

     case LS_LEGACY_ID:

       /* Encode u8 un_legacy_id[20] */
       trunnel_assert(written <= avail);
       if (avail - written < 20)
         goto truncated;
       memcpy(ptr, obj->un_legacy_id, 20);
       written += 20; ptr += 20;
       break;

     case LS_ED25519_ID:

       /* Encode u8 un_ed25519_id[32] */
       trunnel_assert(written <= avail);
       if (avail - written < 32)
         goto truncated;
       memcpy(ptr, obj->un_ed25519_id, 32);
       written += 32; ptr += 32;
       break;

     default:

       /* Encode u8 un_unrecognized[] */
       {
         size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->un_unrecognized);
         trunnel_assert(written <= avail);
         if (avail - written < elt_len)
           goto truncated;
         if (elt_len)
           memcpy(ptr, obj->un_unrecognized.elts_, elt_len);
         written += elt_len; ptr += elt_len;
       }
       break;
   }
   /* Write the length field back to ls_len */
   trunnel_assert(written >= written_before_union);
#if UINT8_MAX < SIZE_MAX
   if (written - written_before_union > UINT8_MAX)
     goto check_failed;
#endif
   trunnel_set_uint8(backptr_ls_len, (written - written_before_union));
 }


 trunnel_assert(ptr == output + written);
#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 link_specifier_parse(), but do not allocate the output object.
*/
static ssize_t
link_specifier_parse_into(link_specifier_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 u8 ls_type */
 CHECK_REMAINING(1, truncated);
 obj->ls_type = (trunnel_get_uint8(ptr));
 remaining -= 1; ptr += 1;

 /* Parse u8 ls_len */
 CHECK_REMAINING(1, truncated);
 obj->ls_len = (trunnel_get_uint8(ptr));
 remaining -= 1; ptr += 1;
 {
   size_t remaining_after;
   CHECK_REMAINING(obj->ls_len, truncated);
   remaining_after = remaining - obj->ls_len;
   remaining = obj->ls_len;

   /* Parse union un[ls_type] */
   switch (obj->ls_type) {

     case LS_IPV4:

       /* Parse u32 un_ipv4_addr */
       CHECK_REMAINING(4, fail);
       obj->un_ipv4_addr = trunnel_ntohl(trunnel_get_uint32(ptr));
       remaining -= 4; ptr += 4;

       /* Parse u16 un_ipv4_port */
       CHECK_REMAINING(2, fail);
       obj->un_ipv4_port = trunnel_ntohs(trunnel_get_uint16(ptr));
       remaining -= 2; ptr += 2;
       break;

     case LS_IPV6:

       /* Parse u8 un_ipv6_addr[16] */
       CHECK_REMAINING(16, fail);
       memcpy(obj->un_ipv6_addr, ptr, 16);
       remaining -= 16; ptr += 16;

       /* Parse u16 un_ipv6_port */
       CHECK_REMAINING(2, fail);
       obj->un_ipv6_port = trunnel_ntohs(trunnel_get_uint16(ptr));
       remaining -= 2; ptr += 2;
       break;

     case LS_LEGACY_ID:

       /* Parse u8 un_legacy_id[20] */
       CHECK_REMAINING(20, fail);
       memcpy(obj->un_legacy_id, ptr, 20);
       remaining -= 20; ptr += 20;
       break;

     case LS_ED25519_ID:

       /* Parse u8 un_ed25519_id[32] */
       CHECK_REMAINING(32, fail);
       memcpy(obj->un_ed25519_id, ptr, 32);
       remaining -= 32; ptr += 32;
       break;

     default:

       /* Parse u8 un_unrecognized[] */
       TRUNNEL_DYNARRAY_EXPAND(uint8_t, &obj->un_unrecognized, remaining, {});
       obj->un_unrecognized.n_ = remaining;
       if (remaining)
         memcpy(obj->un_unrecognized.elts_, ptr, remaining);
       ptr += remaining; remaining -= remaining;
       break;
   }
   if (remaining != 0)
     goto fail;
   remaining = remaining_after;
 }
 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
link_specifier_parse(link_specifier_t **output, const uint8_t *input, const size_t len_in)
{
 ssize_t result;
 *output = link_specifier_new();
 if (NULL == *output)
   return -1;
 result = link_specifier_parse_into(*output, input, len_in);
 if (result < 0) {
   link_specifier_free(*output);
   *output = NULL;
 }
 return result;
}
ed25519_cert_t *
ed25519_cert_new(void)
{
 ed25519_cert_t *val = trunnel_calloc(1, sizeof(ed25519_cert_t));
 if (NULL == val)
   return NULL;
 val->version = 1;
 return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
*/
static void
ed25519_cert_clear(ed25519_cert_t *obj)
{
 (void) obj;
 {

   unsigned idx;
   for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->ext); ++idx) {
     ed25519_cert_extension_free(TRUNNEL_DYNARRAY_GET(&obj->ext, idx));
   }
 }
 TRUNNEL_DYNARRAY_WIPE(&obj->ext);
 TRUNNEL_DYNARRAY_CLEAR(&obj->ext);
}

void
ed25519_cert_free(ed25519_cert_t *obj)
{
 if (obj == NULL)
   return;
 ed25519_cert_clear(obj);
 trunnel_memwipe(obj, sizeof(ed25519_cert_t));
 trunnel_free_(obj);
}

uint8_t
ed25519_cert_get_version(const ed25519_cert_t *inp)
{
 return inp->version;
}
int
ed25519_cert_set_version(ed25519_cert_t *inp, uint8_t val)
{
 if (! ((val == 1))) {
    TRUNNEL_SET_ERROR_CODE(inp);
    return -1;
 }
 inp->version = val;
 return 0;
}
uint8_t
ed25519_cert_get_cert_type(const ed25519_cert_t *inp)
{
 return inp->cert_type;
}
int
ed25519_cert_set_cert_type(ed25519_cert_t *inp, uint8_t val)
{
 inp->cert_type = val;
 return 0;
}
uint32_t
ed25519_cert_get_exp_field(const ed25519_cert_t *inp)
{
 return inp->exp_field;
}
int
ed25519_cert_set_exp_field(ed25519_cert_t *inp, uint32_t val)
{
 inp->exp_field = val;
 return 0;
}
uint8_t
ed25519_cert_get_cert_key_type(const ed25519_cert_t *inp)
{
 return inp->cert_key_type;
}
int
ed25519_cert_set_cert_key_type(ed25519_cert_t *inp, uint8_t val)
{
 inp->cert_key_type = val;
 return 0;
}
size_t
ed25519_cert_getlen_certified_key(const ed25519_cert_t *inp)
{
 (void)inp;  return 32;
}

uint8_t
ed25519_cert_get_certified_key(ed25519_cert_t *inp, size_t idx)
{
 trunnel_assert(idx < 32);
 return inp->certified_key[idx];
}

uint8_t
ed25519_cert_getconst_certified_key(const ed25519_cert_t *inp, size_t idx)
{
 return ed25519_cert_get_certified_key((ed25519_cert_t*)inp, idx);
}
int
ed25519_cert_set_certified_key(ed25519_cert_t *inp, size_t idx, uint8_t elt)
{
 trunnel_assert(idx < 32);
 inp->certified_key[idx] = elt;
 return 0;
}

uint8_t *
ed25519_cert_getarray_certified_key(ed25519_cert_t *inp)
{
 return inp->certified_key;
}
const uint8_t  *
ed25519_cert_getconstarray_certified_key(const ed25519_cert_t *inp)
{
 return (const uint8_t  *)ed25519_cert_getarray_certified_key((ed25519_cert_t*)inp);
}
uint8_t
ed25519_cert_get_n_extensions(const ed25519_cert_t *inp)
{
 return inp->n_extensions;
}
int
ed25519_cert_set_n_extensions(ed25519_cert_t *inp, uint8_t val)
{
 inp->n_extensions = val;
 return 0;
}
size_t
ed25519_cert_getlen_ext(const ed25519_cert_t *inp)
{
 return TRUNNEL_DYNARRAY_LEN(&inp->ext);
}

struct ed25519_cert_extension_st *
ed25519_cert_get_ext(ed25519_cert_t *inp, size_t idx)
{
 return TRUNNEL_DYNARRAY_GET(&inp->ext, idx);
}

const struct ed25519_cert_extension_st *
ed25519_cert_getconst_ext(const ed25519_cert_t *inp, size_t idx)
{
 return ed25519_cert_get_ext((ed25519_cert_t*)inp, idx);
}
int
ed25519_cert_set_ext(ed25519_cert_t *inp, size_t idx, struct ed25519_cert_extension_st * elt)
{
 ed25519_cert_extension_t *oldval = TRUNNEL_DYNARRAY_GET(&inp->ext, idx);
 if (oldval && oldval != elt)
   ed25519_cert_extension_free(oldval);
 return ed25519_cert_set0_ext(inp, idx, elt);
}
int
ed25519_cert_set0_ext(ed25519_cert_t *inp, size_t idx, struct ed25519_cert_extension_st * elt)
{
 TRUNNEL_DYNARRAY_SET(&inp->ext, idx, elt);
 return 0;
}
int
ed25519_cert_add_ext(ed25519_cert_t *inp, struct ed25519_cert_extension_st * elt)
{
#if SIZE_MAX >= UINT8_MAX
 if (inp->ext.n_ == UINT8_MAX)
   goto trunnel_alloc_failed;
#endif
 TRUNNEL_DYNARRAY_ADD(struct ed25519_cert_extension_st *, &inp->ext, elt, {});
 return 0;
trunnel_alloc_failed:
 TRUNNEL_SET_ERROR_CODE(inp);
 return -1;
}

struct ed25519_cert_extension_st * *
ed25519_cert_getarray_ext(ed25519_cert_t *inp)
{
 return inp->ext.elts_;
}
const struct ed25519_cert_extension_st *  const  *
ed25519_cert_getconstarray_ext(const ed25519_cert_t *inp)
{
 return (const struct ed25519_cert_extension_st *  const  *)ed25519_cert_getarray_ext((ed25519_cert_t*)inp);
}
int
ed25519_cert_setlen_ext(ed25519_cert_t *inp, size_t newlen)
{
 struct ed25519_cert_extension_st * *newptr;
#if UINT8_MAX < SIZE_MAX
 if (newlen > UINT8_MAX)
   goto trunnel_alloc_failed;
#endif
 newptr = trunnel_dynarray_setlen(&inp->ext.allocated_,
                &inp->ext.n_, inp->ext.elts_, newlen,
                sizeof(inp->ext.elts_[0]), (trunnel_free_fn_t) ed25519_cert_extension_free,
                &inp->trunnel_error_code_);
 if (newlen != 0 && newptr == NULL)
   goto trunnel_alloc_failed;
 inp->ext.elts_ = newptr;
 return 0;
trunnel_alloc_failed:
 TRUNNEL_SET_ERROR_CODE(inp);
 return -1;
}
size_t
ed25519_cert_getlen_signature(const ed25519_cert_t *inp)
{
 (void)inp;  return 64;
}

uint8_t
ed25519_cert_get_signature(ed25519_cert_t *inp, size_t idx)
{
 trunnel_assert(idx < 64);
 return inp->signature[idx];
}

uint8_t
ed25519_cert_getconst_signature(const ed25519_cert_t *inp, size_t idx)
{
 return ed25519_cert_get_signature((ed25519_cert_t*)inp, idx);
}
int
ed25519_cert_set_signature(ed25519_cert_t *inp, size_t idx, uint8_t elt)
{
 trunnel_assert(idx < 64);
 inp->signature[idx] = elt;
 return 0;
}

uint8_t *
ed25519_cert_getarray_signature(ed25519_cert_t *inp)
{
 return inp->signature;
}
const uint8_t  *
ed25519_cert_getconstarray_signature(const ed25519_cert_t *inp)
{
 return (const uint8_t  *)ed25519_cert_getarray_signature((ed25519_cert_t*)inp);
}
const char *
ed25519_cert_check(const ed25519_cert_t *obj)
{
 if (obj == NULL)
   return "Object was NULL";
 if (obj->trunnel_error_code_)
   return "A set function failed on this object";
 if (! (obj->version == 1))
   return "Integer out of bounds";
 {
   const char *msg;

   unsigned idx;
   for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->ext); ++idx) {
     if (NULL != (msg = ed25519_cert_extension_check(TRUNNEL_DYNARRAY_GET(&obj->ext, idx))))
       return msg;
   }
 }
 if (TRUNNEL_DYNARRAY_LEN(&obj->ext) != obj->n_extensions)
   return "Length mismatch for ext";
 return NULL;
}

ssize_t
ed25519_cert_encoded_len(const ed25519_cert_t *obj)
{
 ssize_t result = 0;

 if (NULL != ed25519_cert_check(obj))
    return -1;


 /* Length of u8 version IN [1] */
 result += 1;

 /* Length of u8 cert_type */
 result += 1;

 /* Length of u32 exp_field */
 result += 4;

 /* Length of u8 cert_key_type */
 result += 1;

 /* Length of u8 certified_key[32] */
 result += 32;

 /* Length of u8 n_extensions */
 result += 1;

 /* Length of struct ed25519_cert_extension ext[n_extensions] */
 {

   unsigned idx;
   for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->ext); ++idx) {
     result += ed25519_cert_extension_encoded_len(TRUNNEL_DYNARRAY_GET(&obj->ext, idx));
   }
 }

 /* Length of u8 signature[64] */
 result += 64;
 return result;
}
int
ed25519_cert_clear_errors(ed25519_cert_t *obj)
{
 int r = obj->trunnel_error_code_;
 obj->trunnel_error_code_ = 0;
 return r;
}
ssize_t
ed25519_cert_encode(uint8_t *output, const size_t avail, const ed25519_cert_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 = ed25519_cert_encoded_len(obj);
#endif

 if (NULL != (msg = ed25519_cert_check(obj)))
   goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
 trunnel_assert(encoded_len >= 0);
#endif

 /* Encode u8 version IN [1] */
 trunnel_assert(written <= avail);
 if (avail - written < 1)
   goto truncated;
 trunnel_set_uint8(ptr, (obj->version));
 written += 1; ptr += 1;

 /* Encode u8 cert_type */
 trunnel_assert(written <= avail);
 if (avail - written < 1)
   goto truncated;
 trunnel_set_uint8(ptr, (obj->cert_type));
 written += 1; ptr += 1;

 /* Encode u32 exp_field */
 trunnel_assert(written <= avail);
 if (avail - written < 4)
   goto truncated;
 trunnel_set_uint32(ptr, trunnel_htonl(obj->exp_field));
 written += 4; ptr += 4;

 /* Encode u8 cert_key_type */
 trunnel_assert(written <= avail);
 if (avail - written < 1)
   goto truncated;
 trunnel_set_uint8(ptr, (obj->cert_key_type));
 written += 1; ptr += 1;

 /* Encode u8 certified_key[32] */
 trunnel_assert(written <= avail);
 if (avail - written < 32)
   goto truncated;
 memcpy(ptr, obj->certified_key, 32);
 written += 32; ptr += 32;

 /* Encode u8 n_extensions */
 trunnel_assert(written <= avail);
 if (avail - written < 1)
   goto truncated;
 trunnel_set_uint8(ptr, (obj->n_extensions));
 written += 1; ptr += 1;

 /* Encode struct ed25519_cert_extension ext[n_extensions] */
 {

   unsigned idx;
   for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->ext); ++idx) {
     trunnel_assert(written <= avail);
     result = ed25519_cert_extension_encode(ptr, avail - written, TRUNNEL_DYNARRAY_GET(&obj->ext, idx));
     if (result < 0)
       goto fail; /* XXXXXXX !*/
     written += result; ptr += result;
   }
 }

 /* Encode u8 signature[64] */
 trunnel_assert(written <= avail);
 if (avail - written < 64)
   goto truncated;
 memcpy(ptr, obj->signature, 64);
 written += 64; ptr += 64;


 trunnel_assert(ptr == output + written);
#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 ed25519_cert_parse(), but do not allocate the output object.
*/
static ssize_t
ed25519_cert_parse_into(ed25519_cert_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 u8 version IN [1] */
 CHECK_REMAINING(1, truncated);
 obj->version = (trunnel_get_uint8(ptr));
 remaining -= 1; ptr += 1;
 if (! (obj->version == 1))
   goto fail;

 /* Parse u8 cert_type */
 CHECK_REMAINING(1, truncated);
 obj->cert_type = (trunnel_get_uint8(ptr));
 remaining -= 1; ptr += 1;

 /* Parse u32 exp_field */
 CHECK_REMAINING(4, truncated);
 obj->exp_field = trunnel_ntohl(trunnel_get_uint32(ptr));
 remaining -= 4; ptr += 4;

 /* Parse u8 cert_key_type */
 CHECK_REMAINING(1, truncated);
 obj->cert_key_type = (trunnel_get_uint8(ptr));
 remaining -= 1; ptr += 1;

 /* Parse u8 certified_key[32] */
 CHECK_REMAINING(32, truncated);
 memcpy(obj->certified_key, ptr, 32);
 remaining -= 32; ptr += 32;

 /* Parse u8 n_extensions */
 CHECK_REMAINING(1, truncated);
 obj->n_extensions = (trunnel_get_uint8(ptr));
 remaining -= 1; ptr += 1;

 /* Parse struct ed25519_cert_extension ext[n_extensions] */
 TRUNNEL_DYNARRAY_EXPAND(ed25519_cert_extension_t *, &obj->ext, obj->n_extensions, {});
 {
   ed25519_cert_extension_t * elt;
   unsigned idx;
   for (idx = 0; idx < obj->n_extensions; ++idx) {
     result = ed25519_cert_extension_parse(&elt, ptr, remaining);
     if (result < 0)
       goto relay_fail;
     trunnel_assert((size_t)result <= remaining);
     remaining -= result; ptr += result;
     TRUNNEL_DYNARRAY_ADD(ed25519_cert_extension_t *, &obj->ext, elt, {ed25519_cert_extension_free(elt);});
   }
 }

 /* Parse u8 signature[64] */
 CHECK_REMAINING(64, truncated);
 memcpy(obj->signature, ptr, 64);
 remaining -= 64; ptr += 64;
 trunnel_assert(ptr + remaining == input + len_in);
 return len_in - remaining;

truncated:
 return -2;
relay_fail:
 trunnel_assert(result < 0);
 return result;
trunnel_alloc_failed:
 return -1;
fail:
 result = -1;
 return result;
}

ssize_t
ed25519_cert_parse(ed25519_cert_t **output, const uint8_t *input, const size_t len_in)
{
 ssize_t result;
 *output = ed25519_cert_new();
 if (NULL == *output)
   return -1;
 result = ed25519_cert_parse_into(*output, input, len_in);
 if (result < 0) {
   ed25519_cert_free(*output);
   *output = NULL;
 }
 return result;
}
extend2_cell_body_t *
extend2_cell_body_new(void)
{
 extend2_cell_body_t *val = trunnel_calloc(1, sizeof(extend2_cell_body_t));
 if (NULL == val)
   return NULL;
 return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
*/
static void
extend2_cell_body_clear(extend2_cell_body_t *obj)
{
 (void) obj;
 {

   unsigned idx;
   for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->ls); ++idx) {
     link_specifier_free(TRUNNEL_DYNARRAY_GET(&obj->ls, idx));
   }
 }
 TRUNNEL_DYNARRAY_WIPE(&obj->ls);
 TRUNNEL_DYNARRAY_CLEAR(&obj->ls);
 create2_cell_body_free(obj->create2);
 obj->create2 = NULL;
}

void
extend2_cell_body_free(extend2_cell_body_t *obj)
{
 if (obj == NULL)
   return;
 extend2_cell_body_clear(obj);
 trunnel_memwipe(obj, sizeof(extend2_cell_body_t));
 trunnel_free_(obj);
}

uint8_t
extend2_cell_body_get_n_spec(const extend2_cell_body_t *inp)
{
 return inp->n_spec;
}
int
extend2_cell_body_set_n_spec(extend2_cell_body_t *inp, uint8_t val)
{
 inp->n_spec = val;
 return 0;
}
size_t
extend2_cell_body_getlen_ls(const extend2_cell_body_t *inp)
{
 return TRUNNEL_DYNARRAY_LEN(&inp->ls);
}

struct link_specifier_st *
extend2_cell_body_get_ls(extend2_cell_body_t *inp, size_t idx)
{
 return TRUNNEL_DYNARRAY_GET(&inp->ls, idx);
}

const struct link_specifier_st *
extend2_cell_body_getconst_ls(const extend2_cell_body_t *inp, size_t idx)
{
 return extend2_cell_body_get_ls((extend2_cell_body_t*)inp, idx);
}
int
extend2_cell_body_set_ls(extend2_cell_body_t *inp, size_t idx, struct link_specifier_st * elt)
{
 link_specifier_t *oldval = TRUNNEL_DYNARRAY_GET(&inp->ls, idx);
 if (oldval && oldval != elt)
   link_specifier_free(oldval);
 return extend2_cell_body_set0_ls(inp, idx, elt);
}
int
extend2_cell_body_set0_ls(extend2_cell_body_t *inp, size_t idx, struct link_specifier_st * elt)
{
 TRUNNEL_DYNARRAY_SET(&inp->ls, idx, elt);
 return 0;
}
int
extend2_cell_body_add_ls(extend2_cell_body_t *inp, struct link_specifier_st * elt)
{
#if SIZE_MAX >= UINT8_MAX
 if (inp->ls.n_ == UINT8_MAX)
   goto trunnel_alloc_failed;
#endif
 TRUNNEL_DYNARRAY_ADD(struct link_specifier_st *, &inp->ls, elt, {});
 return 0;
trunnel_alloc_failed:
 TRUNNEL_SET_ERROR_CODE(inp);
 return -1;
}

struct link_specifier_st * *
extend2_cell_body_getarray_ls(extend2_cell_body_t *inp)
{
 return inp->ls.elts_;
}
const struct link_specifier_st *  const  *
extend2_cell_body_getconstarray_ls(const extend2_cell_body_t *inp)
{
 return (const struct link_specifier_st *  const  *)extend2_cell_body_getarray_ls((extend2_cell_body_t*)inp);
}
int
extend2_cell_body_setlen_ls(extend2_cell_body_t *inp, size_t newlen)
{
 struct link_specifier_st * *newptr;
#if UINT8_MAX < SIZE_MAX
 if (newlen > UINT8_MAX)
   goto trunnel_alloc_failed;
#endif
 newptr = trunnel_dynarray_setlen(&inp->ls.allocated_,
                &inp->ls.n_, inp->ls.elts_, newlen,
                sizeof(inp->ls.elts_[0]), (trunnel_free_fn_t) link_specifier_free,
                &inp->trunnel_error_code_);
 if (newlen != 0 && newptr == NULL)
   goto trunnel_alloc_failed;
 inp->ls.elts_ = newptr;
 return 0;
trunnel_alloc_failed:
 TRUNNEL_SET_ERROR_CODE(inp);
 return -1;
}
struct create2_cell_body_st *
extend2_cell_body_get_create2(extend2_cell_body_t *inp)
{
 return inp->create2;
}
const struct create2_cell_body_st *
extend2_cell_body_getconst_create2(const extend2_cell_body_t *inp)
{
 return extend2_cell_body_get_create2((extend2_cell_body_t*) inp);
}
int
extend2_cell_body_set_create2(extend2_cell_body_t *inp, struct create2_cell_body_st *val)
{
 if (inp->create2 && inp->create2 != val)
   create2_cell_body_free(inp->create2);
 return extend2_cell_body_set0_create2(inp, val);
}
int
extend2_cell_body_set0_create2(extend2_cell_body_t *inp, struct create2_cell_body_st *val)
{
 inp->create2 = val;
 return 0;
}
const char *
extend2_cell_body_check(const extend2_cell_body_t *obj)
{
 if (obj == NULL)
   return "Object was NULL";
 if (obj->trunnel_error_code_)
   return "A set function failed on this object";
 {
   const char *msg;

   unsigned idx;
   for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->ls); ++idx) {
     if (NULL != (msg = link_specifier_check(TRUNNEL_DYNARRAY_GET(&obj->ls, idx))))
       return msg;
   }
 }
 if (TRUNNEL_DYNARRAY_LEN(&obj->ls) != obj->n_spec)
   return "Length mismatch for ls";
 {
   const char *msg;
   if (NULL != (msg = create2_cell_body_check(obj->create2)))
     return msg;
 }
 return NULL;
}

ssize_t
extend2_cell_body_encoded_len(const extend2_cell_body_t *obj)
{
 ssize_t result = 0;

 if (NULL != extend2_cell_body_check(obj))
    return -1;


 /* Length of u8 n_spec */
 result += 1;

 /* Length of struct link_specifier ls[n_spec] */
 {

   unsigned idx;
   for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->ls); ++idx) {
     result += link_specifier_encoded_len(TRUNNEL_DYNARRAY_GET(&obj->ls, idx));
   }
 }

 /* Length of struct create2_cell_body create2 */
 result += create2_cell_body_encoded_len(obj->create2);
 return result;
}
int
extend2_cell_body_clear_errors(extend2_cell_body_t *obj)
{
 int r = obj->trunnel_error_code_;
 obj->trunnel_error_code_ = 0;
 return r;
}
ssize_t
extend2_cell_body_encode(uint8_t *output, const size_t avail, const extend2_cell_body_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 = extend2_cell_body_encoded_len(obj);
#endif

 if (NULL != (msg = extend2_cell_body_check(obj)))
   goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
 trunnel_assert(encoded_len >= 0);
#endif

 /* Encode u8 n_spec */
 trunnel_assert(written <= avail);
 if (avail - written < 1)
   goto truncated;
 trunnel_set_uint8(ptr, (obj->n_spec));
 written += 1; ptr += 1;

 /* Encode struct link_specifier ls[n_spec] */
 {

   unsigned idx;
   for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->ls); ++idx) {
     trunnel_assert(written <= avail);
     result = link_specifier_encode(ptr, avail - written, TRUNNEL_DYNARRAY_GET(&obj->ls, idx));
     if (result < 0)
       goto fail; /* XXXXXXX !*/
     written += result; ptr += result;
   }
 }

 /* Encode struct create2_cell_body create2 */
 trunnel_assert(written <= avail);
 result = create2_cell_body_encode(ptr, avail - written, obj->create2);
 if (result < 0)
   goto fail; /* XXXXXXX !*/
 written += result; ptr += result;


 trunnel_assert(ptr == output + written);
#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 extend2_cell_body_parse(), but do not allocate the output
* object.
*/
static ssize_t
extend2_cell_body_parse_into(extend2_cell_body_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 u8 n_spec */
 CHECK_REMAINING(1, truncated);
 obj->n_spec = (trunnel_get_uint8(ptr));
 remaining -= 1; ptr += 1;

 /* Parse struct link_specifier ls[n_spec] */
 TRUNNEL_DYNARRAY_EXPAND(link_specifier_t *, &obj->ls, obj->n_spec, {});
 {
   link_specifier_t * elt;
   unsigned idx;
   for (idx = 0; idx < obj->n_spec; ++idx) {
     result = link_specifier_parse(&elt, ptr, remaining);
     if (result < 0)
       goto relay_fail;
     trunnel_assert((size_t)result <= remaining);
     remaining -= result; ptr += result;
     TRUNNEL_DYNARRAY_ADD(link_specifier_t *, &obj->ls, elt, {link_specifier_free(elt);});
   }
 }

 /* Parse struct create2_cell_body create2 */
 result = create2_cell_body_parse(&obj->create2, ptr, remaining);
 if (result < 0)
   goto relay_fail;
 trunnel_assert((size_t)result <= remaining);
 remaining -= result; ptr += result;
 trunnel_assert(ptr + remaining == input + len_in);
 return len_in - remaining;

truncated:
 return -2;
relay_fail:
 trunnel_assert(result < 0);
 return result;
trunnel_alloc_failed:
 return -1;
}

ssize_t
extend2_cell_body_parse(extend2_cell_body_t **output, const uint8_t *input, const size_t len_in)
{
 ssize_t result;
 *output = extend2_cell_body_new();
 if (NULL == *output)
   return -1;
 result = extend2_cell_body_parse_into(*output, input, len_in);
 if (result < 0) {
   extend2_cell_body_free(*output);
   *output = NULL;
 }
 return result;
}
link_specifier_list_t *
link_specifier_list_new(void)
{
 link_specifier_list_t *val = trunnel_calloc(1, sizeof(link_specifier_list_t));
 if (NULL == val)
   return NULL;
 return val;
}

/** Release all storage held inside 'obj', but do not free 'obj'.
*/
static void
link_specifier_list_clear(link_specifier_list_t *obj)
{
 (void) obj;
 {

   unsigned idx;
   for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->spec); ++idx) {
     link_specifier_free(TRUNNEL_DYNARRAY_GET(&obj->spec, idx));
   }
 }
 TRUNNEL_DYNARRAY_WIPE(&obj->spec);
 TRUNNEL_DYNARRAY_CLEAR(&obj->spec);
}

void
link_specifier_list_free(link_specifier_list_t *obj)
{
 if (obj == NULL)
   return;
 link_specifier_list_clear(obj);
 trunnel_memwipe(obj, sizeof(link_specifier_list_t));
 trunnel_free_(obj);
}

uint8_t
link_specifier_list_get_n_spec(const link_specifier_list_t *inp)
{
 return inp->n_spec;
}
int
link_specifier_list_set_n_spec(link_specifier_list_t *inp, uint8_t val)
{
 inp->n_spec = val;
 return 0;
}
size_t
link_specifier_list_getlen_spec(const link_specifier_list_t *inp)
{
 return TRUNNEL_DYNARRAY_LEN(&inp->spec);
}

struct link_specifier_st *
link_specifier_list_get_spec(link_specifier_list_t *inp, size_t idx)
{
 return TRUNNEL_DYNARRAY_GET(&inp->spec, idx);
}

const struct link_specifier_st *
link_specifier_list_getconst_spec(const link_specifier_list_t *inp, size_t idx)
{
 return link_specifier_list_get_spec((link_specifier_list_t*)inp, idx);
}
int
link_specifier_list_set_spec(link_specifier_list_t *inp, size_t idx, struct link_specifier_st * elt)
{
 link_specifier_t *oldval = TRUNNEL_DYNARRAY_GET(&inp->spec, idx);
 if (oldval && oldval != elt)
   link_specifier_free(oldval);
 return link_specifier_list_set0_spec(inp, idx, elt);
}
int
link_specifier_list_set0_spec(link_specifier_list_t *inp, size_t idx, struct link_specifier_st * elt)
{
 TRUNNEL_DYNARRAY_SET(&inp->spec, idx, elt);
 return 0;
}
int
link_specifier_list_add_spec(link_specifier_list_t *inp, struct link_specifier_st * elt)
{
#if SIZE_MAX >= UINT8_MAX
 if (inp->spec.n_ == UINT8_MAX)
   goto trunnel_alloc_failed;
#endif
 TRUNNEL_DYNARRAY_ADD(struct link_specifier_st *, &inp->spec, elt, {});
 return 0;
trunnel_alloc_failed:
 TRUNNEL_SET_ERROR_CODE(inp);
 return -1;
}

struct link_specifier_st * *
link_specifier_list_getarray_spec(link_specifier_list_t *inp)
{
 return inp->spec.elts_;
}
const struct link_specifier_st *  const  *
link_specifier_list_getconstarray_spec(const link_specifier_list_t *inp)
{
 return (const struct link_specifier_st *  const  *)link_specifier_list_getarray_spec((link_specifier_list_t*)inp);
}
int
link_specifier_list_setlen_spec(link_specifier_list_t *inp, size_t newlen)
{
 struct link_specifier_st * *newptr;
#if UINT8_MAX < SIZE_MAX
 if (newlen > UINT8_MAX)
   goto trunnel_alloc_failed;
#endif
 newptr = trunnel_dynarray_setlen(&inp->spec.allocated_,
                &inp->spec.n_, inp->spec.elts_, newlen,
                sizeof(inp->spec.elts_[0]), (trunnel_free_fn_t) link_specifier_free,
                &inp->trunnel_error_code_);
 if (newlen != 0 && newptr == NULL)
   goto trunnel_alloc_failed;
 inp->spec.elts_ = newptr;
 return 0;
trunnel_alloc_failed:
 TRUNNEL_SET_ERROR_CODE(inp);
 return -1;
}
const char *
link_specifier_list_check(const link_specifier_list_t *obj)
{
 if (obj == NULL)
   return "Object was NULL";
 if (obj->trunnel_error_code_)
   return "A set function failed on this object";
 {
   const char *msg;

   unsigned idx;
   for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->spec); ++idx) {
     if (NULL != (msg = link_specifier_check(TRUNNEL_DYNARRAY_GET(&obj->spec, idx))))
       return msg;
   }
 }
 if (TRUNNEL_DYNARRAY_LEN(&obj->spec) != obj->n_spec)
   return "Length mismatch for spec";
 return NULL;
}

ssize_t
link_specifier_list_encoded_len(const link_specifier_list_t *obj)
{
 ssize_t result = 0;

 if (NULL != link_specifier_list_check(obj))
    return -1;


 /* Length of u8 n_spec */
 result += 1;

 /* Length of struct link_specifier spec[n_spec] */
 {

   unsigned idx;
   for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->spec); ++idx) {
     result += link_specifier_encoded_len(TRUNNEL_DYNARRAY_GET(&obj->spec, idx));
   }
 }
 return result;
}
int
link_specifier_list_clear_errors(link_specifier_list_t *obj)
{
 int r = obj->trunnel_error_code_;
 obj->trunnel_error_code_ = 0;
 return r;
}
ssize_t
link_specifier_list_encode(uint8_t *output, const size_t avail, const link_specifier_list_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 = link_specifier_list_encoded_len(obj);
#endif

 if (NULL != (msg = link_specifier_list_check(obj)))
   goto check_failed;

#ifdef TRUNNEL_CHECK_ENCODED_LEN
 trunnel_assert(encoded_len >= 0);
#endif

 /* Encode u8 n_spec */
 trunnel_assert(written <= avail);
 if (avail - written < 1)
   goto truncated;
 trunnel_set_uint8(ptr, (obj->n_spec));
 written += 1; ptr += 1;

 /* Encode struct link_specifier spec[n_spec] */
 {

   unsigned idx;
   for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->spec); ++idx) {
     trunnel_assert(written <= avail);
     result = link_specifier_encode(ptr, avail - written, TRUNNEL_DYNARRAY_GET(&obj->spec, idx));
     if (result < 0)
       goto fail; /* XXXXXXX !*/
     written += result; ptr += result;
   }
 }


 trunnel_assert(ptr == output + written);
#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 link_specifier_list_parse(), but do not allocate the output
* object.
*/
static ssize_t
link_specifier_list_parse_into(link_specifier_list_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 u8 n_spec */
 CHECK_REMAINING(1, truncated);
 obj->n_spec = (trunnel_get_uint8(ptr));
 remaining -= 1; ptr += 1;

 /* Parse struct link_specifier spec[n_spec] */
 TRUNNEL_DYNARRAY_EXPAND(link_specifier_t *, &obj->spec, obj->n_spec, {});
 {
   link_specifier_t * elt;
   unsigned idx;
   for (idx = 0; idx < obj->n_spec; ++idx) {
     result = link_specifier_parse(&elt, ptr, remaining);
     if (result < 0)
       goto relay_fail;
     trunnel_assert((size_t)result <= remaining);
     remaining -= result; ptr += result;
     TRUNNEL_DYNARRAY_ADD(link_specifier_t *, &obj->spec, elt, {link_specifier_free(elt);});
   }
 }
 trunnel_assert(ptr + remaining == input + len_in);
 return len_in - remaining;

truncated:
 return -2;
relay_fail:
 trunnel_assert(result < 0);
 return result;
trunnel_alloc_failed:
 return -1;
}

ssize_t
link_specifier_list_parse(link_specifier_list_t **output, const uint8_t *input, const size_t len_in)
{
 ssize_t result;
 *output = link_specifier_list_new();
 if (NULL == *output)
   return -1;
 result = link_specifier_list_parse_into(*output, input, len_in);
 if (result < 0) {
   link_specifier_list_free(*output);
   *output = NULL;
 }
 return result;
}