mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-10 13:13:44 +01:00
trunnel: INTRODUCE1 PoW cell extension
Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
parent
95445f49f1
commit
5ef811b7d0
@ -44,6 +44,325 @@ ssize_t link_specifier_encoded_len(const link_specifier_t *obj);
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ssize_t link_specifier_encode(uint8_t *output, size_t avail, const link_specifier_t *input);
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const char *link_specifier_check(const link_specifier_t *obj);
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int link_specifier_clear_errors(link_specifier_t *obj);
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trn_cell_extension_pow_t *
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trn_cell_extension_pow_new(void)
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{
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trn_cell_extension_pow_t *val = trunnel_calloc(1, sizeof(trn_cell_extension_pow_t));
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if (NULL == val)
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return NULL;
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val->pow_version = 1;
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return val;
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}
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/** Release all storage held inside 'obj', but do not free 'obj'.
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*/
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static void
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trn_cell_extension_pow_clear(trn_cell_extension_pow_t *obj)
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{
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(void) obj;
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}
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void
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trn_cell_extension_pow_free(trn_cell_extension_pow_t *obj)
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{
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if (obj == NULL)
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return;
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trn_cell_extension_pow_clear(obj);
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trunnel_memwipe(obj, sizeof(trn_cell_extension_pow_t));
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trunnel_free_(obj);
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}
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uint8_t
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trn_cell_extension_pow_get_pow_version(const trn_cell_extension_pow_t *inp)
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{
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return inp->pow_version;
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}
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int
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trn_cell_extension_pow_set_pow_version(trn_cell_extension_pow_t *inp, uint8_t val)
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{
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if (! ((val == 1))) {
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TRUNNEL_SET_ERROR_CODE(inp);
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return -1;
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}
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inp->pow_version = val;
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return 0;
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}
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size_t
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trn_cell_extension_pow_getlen_pow_nonce(const trn_cell_extension_pow_t *inp)
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{
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(void)inp; return TRUNNEL_POW_NONCE_LEN;
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}
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uint8_t
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trn_cell_extension_pow_get_pow_nonce(trn_cell_extension_pow_t *inp, size_t idx)
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{
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trunnel_assert(idx < TRUNNEL_POW_NONCE_LEN);
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return inp->pow_nonce[idx];
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}
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uint8_t
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trn_cell_extension_pow_getconst_pow_nonce(const trn_cell_extension_pow_t *inp, size_t idx)
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{
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return trn_cell_extension_pow_get_pow_nonce((trn_cell_extension_pow_t*)inp, idx);
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}
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int
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trn_cell_extension_pow_set_pow_nonce(trn_cell_extension_pow_t *inp, size_t idx, uint8_t elt)
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{
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trunnel_assert(idx < TRUNNEL_POW_NONCE_LEN);
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inp->pow_nonce[idx] = elt;
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return 0;
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}
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uint8_t *
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trn_cell_extension_pow_getarray_pow_nonce(trn_cell_extension_pow_t *inp)
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{
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return inp->pow_nonce;
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}
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const uint8_t *
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trn_cell_extension_pow_getconstarray_pow_nonce(const trn_cell_extension_pow_t *inp)
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{
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return (const uint8_t *)trn_cell_extension_pow_getarray_pow_nonce((trn_cell_extension_pow_t*)inp);
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}
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uint32_t
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trn_cell_extension_pow_get_pow_effort(const trn_cell_extension_pow_t *inp)
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{
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return inp->pow_effort;
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}
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int
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trn_cell_extension_pow_set_pow_effort(trn_cell_extension_pow_t *inp, uint32_t val)
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{
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inp->pow_effort = val;
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return 0;
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}
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uint32_t
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trn_cell_extension_pow_get_pow_seed(const trn_cell_extension_pow_t *inp)
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{
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return inp->pow_seed;
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}
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int
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trn_cell_extension_pow_set_pow_seed(trn_cell_extension_pow_t *inp, uint32_t val)
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{
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inp->pow_seed = val;
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return 0;
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}
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size_t
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trn_cell_extension_pow_getlen_pow_solution(const trn_cell_extension_pow_t *inp)
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{
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(void)inp; return TRUNNEL_POW_SOLUTION_LEN;
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}
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uint8_t
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trn_cell_extension_pow_get_pow_solution(trn_cell_extension_pow_t *inp, size_t idx)
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{
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trunnel_assert(idx < TRUNNEL_POW_SOLUTION_LEN);
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return inp->pow_solution[idx];
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}
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uint8_t
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trn_cell_extension_pow_getconst_pow_solution(const trn_cell_extension_pow_t *inp, size_t idx)
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{
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return trn_cell_extension_pow_get_pow_solution((trn_cell_extension_pow_t*)inp, idx);
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}
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int
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trn_cell_extension_pow_set_pow_solution(trn_cell_extension_pow_t *inp, size_t idx, uint8_t elt)
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{
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trunnel_assert(idx < TRUNNEL_POW_SOLUTION_LEN);
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inp->pow_solution[idx] = elt;
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return 0;
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}
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uint8_t *
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trn_cell_extension_pow_getarray_pow_solution(trn_cell_extension_pow_t *inp)
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{
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return inp->pow_solution;
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}
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const uint8_t *
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trn_cell_extension_pow_getconstarray_pow_solution(const trn_cell_extension_pow_t *inp)
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{
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return (const uint8_t *)trn_cell_extension_pow_getarray_pow_solution((trn_cell_extension_pow_t*)inp);
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}
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const char *
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trn_cell_extension_pow_check(const trn_cell_extension_pow_t *obj)
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{
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if (obj == NULL)
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return "Object was NULL";
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if (obj->trunnel_error_code_)
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return "A set function failed on this object";
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if (! (obj->pow_version == 1))
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return "Integer out of bounds";
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return NULL;
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}
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ssize_t
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trn_cell_extension_pow_encoded_len(const trn_cell_extension_pow_t *obj)
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{
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ssize_t result = 0;
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if (NULL != trn_cell_extension_pow_check(obj))
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return -1;
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/* Length of u8 pow_version IN [1] */
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result += 1;
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/* Length of u8 pow_nonce[TRUNNEL_POW_NONCE_LEN] */
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result += TRUNNEL_POW_NONCE_LEN;
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/* Length of u32 pow_effort */
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result += 4;
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/* Length of u32 pow_seed */
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result += 4;
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/* Length of u8 pow_solution[TRUNNEL_POW_SOLUTION_LEN] */
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result += TRUNNEL_POW_SOLUTION_LEN;
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return result;
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}
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int
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trn_cell_extension_pow_clear_errors(trn_cell_extension_pow_t *obj)
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{
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int r = obj->trunnel_error_code_;
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obj->trunnel_error_code_ = 0;
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return r;
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}
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ssize_t
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trn_cell_extension_pow_encode(uint8_t *output, const size_t avail, const trn_cell_extension_pow_t *obj)
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{
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ssize_t result = 0;
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size_t written = 0;
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uint8_t *ptr = output;
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const char *msg;
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#ifdef TRUNNEL_CHECK_ENCODED_LEN
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const ssize_t encoded_len = trn_cell_extension_pow_encoded_len(obj);
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#endif
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if (NULL != (msg = trn_cell_extension_pow_check(obj)))
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goto check_failed;
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#ifdef TRUNNEL_CHECK_ENCODED_LEN
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trunnel_assert(encoded_len >= 0);
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#endif
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/* Encode u8 pow_version IN [1] */
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trunnel_assert(written <= avail);
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if (avail - written < 1)
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goto truncated;
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trunnel_set_uint8(ptr, (obj->pow_version));
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written += 1; ptr += 1;
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/* Encode u8 pow_nonce[TRUNNEL_POW_NONCE_LEN] */
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trunnel_assert(written <= avail);
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if (avail - written < TRUNNEL_POW_NONCE_LEN)
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goto truncated;
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memcpy(ptr, obj->pow_nonce, TRUNNEL_POW_NONCE_LEN);
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written += TRUNNEL_POW_NONCE_LEN; ptr += TRUNNEL_POW_NONCE_LEN;
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/* Encode u32 pow_effort */
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trunnel_assert(written <= avail);
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if (avail - written < 4)
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goto truncated;
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trunnel_set_uint32(ptr, trunnel_htonl(obj->pow_effort));
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written += 4; ptr += 4;
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/* Encode u32 pow_seed */
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trunnel_assert(written <= avail);
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if (avail - written < 4)
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goto truncated;
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trunnel_set_uint32(ptr, trunnel_htonl(obj->pow_seed));
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written += 4; ptr += 4;
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/* Encode u8 pow_solution[TRUNNEL_POW_SOLUTION_LEN] */
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trunnel_assert(written <= avail);
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if (avail - written < TRUNNEL_POW_SOLUTION_LEN)
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goto truncated;
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memcpy(ptr, obj->pow_solution, TRUNNEL_POW_SOLUTION_LEN);
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written += TRUNNEL_POW_SOLUTION_LEN; ptr += TRUNNEL_POW_SOLUTION_LEN;
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trunnel_assert(ptr == output + written);
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#ifdef TRUNNEL_CHECK_ENCODED_LEN
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{
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trunnel_assert(encoded_len >= 0);
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trunnel_assert((size_t)encoded_len == written);
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}
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#endif
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return written;
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truncated:
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result = -2;
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goto fail;
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check_failed:
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(void)msg;
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result = -1;
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goto fail;
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fail:
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trunnel_assert(result < 0);
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return result;
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}
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/** As trn_cell_extension_pow_parse(), but do not allocate the output
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* object.
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*/
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static ssize_t
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trn_cell_extension_pow_parse_into(trn_cell_extension_pow_t *obj, const uint8_t *input, const size_t len_in)
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{
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const uint8_t *ptr = input;
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size_t remaining = len_in;
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ssize_t result = 0;
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(void)result;
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/* Parse u8 pow_version IN [1] */
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CHECK_REMAINING(1, truncated);
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obj->pow_version = (trunnel_get_uint8(ptr));
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remaining -= 1; ptr += 1;
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if (! (obj->pow_version == 1))
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goto fail;
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/* Parse u8 pow_nonce[TRUNNEL_POW_NONCE_LEN] */
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CHECK_REMAINING(TRUNNEL_POW_NONCE_LEN, truncated);
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memcpy(obj->pow_nonce, ptr, TRUNNEL_POW_NONCE_LEN);
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remaining -= TRUNNEL_POW_NONCE_LEN; ptr += TRUNNEL_POW_NONCE_LEN;
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/* Parse u32 pow_effort */
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CHECK_REMAINING(4, truncated);
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obj->pow_effort = trunnel_ntohl(trunnel_get_uint32(ptr));
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remaining -= 4; ptr += 4;
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/* Parse u32 pow_seed */
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CHECK_REMAINING(4, truncated);
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obj->pow_seed = trunnel_ntohl(trunnel_get_uint32(ptr));
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remaining -= 4; ptr += 4;
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/* Parse u8 pow_solution[TRUNNEL_POW_SOLUTION_LEN] */
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CHECK_REMAINING(TRUNNEL_POW_SOLUTION_LEN, truncated);
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memcpy(obj->pow_solution, ptr, TRUNNEL_POW_SOLUTION_LEN);
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remaining -= TRUNNEL_POW_SOLUTION_LEN; ptr += TRUNNEL_POW_SOLUTION_LEN;
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trunnel_assert(ptr + remaining == input + len_in);
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return len_in - remaining;
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truncated:
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return -2;
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fail:
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result = -1;
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return result;
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}
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ssize_t
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trn_cell_extension_pow_parse(trn_cell_extension_pow_t **output, const uint8_t *input, const size_t len_in)
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{
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ssize_t result;
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*output = trn_cell_extension_pow_new();
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if (NULL == *output)
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return -1;
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result = trn_cell_extension_pow_parse_into(*output, input, len_in);
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if (result < 0) {
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trn_cell_extension_pow_free(*output);
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*output = NULL;
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}
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return result;
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}
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trn_cell_introduce1_t *
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trn_cell_introduce1_new(void)
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{
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@ -19,6 +19,21 @@ struct link_specifier_st;
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#define TRUNNEL_HS_INTRO_AUTH_KEY_TYPE_LEGACY1 1
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#define TRUNNEL_HS_INTRO_AUTH_KEY_TYPE_ED25519 2
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#define TRUNNEL_HS_INTRO_ONION_KEY_TYPE_NTOR 1
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#define TRUNNEL_CELL_EXTENSION_TYPE_POW 1
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#define TRUNNEL_POW_NONCE_LEN 16
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#define TRUNNEL_POW_SOLUTION_LEN 16
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#define TRUNNEL_POW_EQUIX 1
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#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_TRN_CELL_EXTENSION_POW)
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struct trn_cell_extension_pow_st {
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uint8_t pow_version;
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uint8_t pow_nonce[TRUNNEL_POW_NONCE_LEN];
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uint32_t pow_effort;
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uint32_t pow_seed;
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uint8_t pow_solution[TRUNNEL_POW_SOLUTION_LEN];
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uint8_t trunnel_error_code_;
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};
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#endif
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typedef struct trn_cell_extension_pow_st trn_cell_extension_pow_t;
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#if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_TRN_CELL_INTRODUCE1)
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struct trn_cell_introduce1_st {
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uint8_t legacy_key_id[TRUNNEL_SHA1_LEN];
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@ -53,6 +68,119 @@ struct trn_cell_introduce_encrypted_st {
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};
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#endif
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typedef struct trn_cell_introduce_encrypted_st trn_cell_introduce_encrypted_t;
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/** Return a newly allocated trn_cell_extension_pow with all elements
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* set to zero.
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*/
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trn_cell_extension_pow_t *trn_cell_extension_pow_new(void);
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/** Release all storage held by the trn_cell_extension_pow in
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* 'victim'. (Do nothing if 'victim' is NULL.)
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*/
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void trn_cell_extension_pow_free(trn_cell_extension_pow_t *victim);
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/** Try to parse a trn_cell_extension_pow from the buffer in 'input',
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* using up to 'len_in' bytes from the input buffer. On success,
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* return the number of bytes consumed and set *output to the newly
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* allocated trn_cell_extension_pow_t. On failure, return -2 if the
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* input appears truncated, and -1 if the input is otherwise invalid.
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*/
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ssize_t trn_cell_extension_pow_parse(trn_cell_extension_pow_t **output, const uint8_t *input, const size_t len_in);
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/** Return the number of bytes we expect to need to encode the
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* trn_cell_extension_pow in 'obj'. On failure, return a negative
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* value. Note that this value may be an overestimate, and can even be
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* an underestimate for certain unencodeable objects.
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*/
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ssize_t trn_cell_extension_pow_encoded_len(const trn_cell_extension_pow_t *obj);
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/** Try to encode the trn_cell_extension_pow from 'input' into the
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* buffer at 'output', using up to 'avail' bytes of the output buffer.
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* On success, return the number of bytes used. On failure, return -2
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* if the buffer was not long enough, and -1 if the input was invalid.
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*/
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ssize_t trn_cell_extension_pow_encode(uint8_t *output, size_t avail, const trn_cell_extension_pow_t *input);
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/** Check whether the internal state of the trn_cell_extension_pow in
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* 'obj' is consistent. Return NULL if it is, and a short message if
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* it is not.
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*/
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const char *trn_cell_extension_pow_check(const trn_cell_extension_pow_t *obj);
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/** Clear any errors that were set on the object 'obj' by its setter
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* functions. Return true iff errors were cleared.
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*/
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int trn_cell_extension_pow_clear_errors(trn_cell_extension_pow_t *obj);
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/** Return the value of the pow_version field of the
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* trn_cell_extension_pow_t in 'inp'
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*/
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uint8_t trn_cell_extension_pow_get_pow_version(const trn_cell_extension_pow_t *inp);
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/** Set the value of the pow_version field of the
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* trn_cell_extension_pow_t in 'inp' to 'val'. Return 0 on success;
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* return -1 and set the error code on 'inp' on failure.
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*/
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int trn_cell_extension_pow_set_pow_version(trn_cell_extension_pow_t *inp, uint8_t val);
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/** Return the (constant) length of the array holding the pow_nonce
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* field of the trn_cell_extension_pow_t in 'inp'.
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*/
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size_t trn_cell_extension_pow_getlen_pow_nonce(const trn_cell_extension_pow_t *inp);
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/** Return the element at position 'idx' of the fixed array field
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* pow_nonce of the trn_cell_extension_pow_t in 'inp'.
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*/
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uint8_t trn_cell_extension_pow_get_pow_nonce(trn_cell_extension_pow_t *inp, size_t idx);
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/** As trn_cell_extension_pow_get_pow_nonce, but take and return a
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* const pointer
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*/
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uint8_t trn_cell_extension_pow_getconst_pow_nonce(const trn_cell_extension_pow_t *inp, size_t idx);
|
||||
/** Change the element at position 'idx' of the fixed array field
|
||||
* pow_nonce of the trn_cell_extension_pow_t in 'inp', so that it will
|
||||
* hold the value 'elt'.
|
||||
*/
|
||||
int trn_cell_extension_pow_set_pow_nonce(trn_cell_extension_pow_t *inp, size_t idx, uint8_t elt);
|
||||
/** Return a pointer to the TRUNNEL_POW_NONCE_LEN-element array field
|
||||
* pow_nonce of 'inp'.
|
||||
*/
|
||||
uint8_t * trn_cell_extension_pow_getarray_pow_nonce(trn_cell_extension_pow_t *inp);
|
||||
/** As trn_cell_extension_pow_get_pow_nonce, but take and return a
|
||||
* const pointer
|
||||
*/
|
||||
const uint8_t * trn_cell_extension_pow_getconstarray_pow_nonce(const trn_cell_extension_pow_t *inp);
|
||||
/** Return the value of the pow_effort field of the
|
||||
* trn_cell_extension_pow_t in 'inp'
|
||||
*/
|
||||
uint32_t trn_cell_extension_pow_get_pow_effort(const trn_cell_extension_pow_t *inp);
|
||||
/** Set the value of the pow_effort field of the
|
||||
* trn_cell_extension_pow_t in 'inp' to 'val'. Return 0 on success;
|
||||
* return -1 and set the error code on 'inp' on failure.
|
||||
*/
|
||||
int trn_cell_extension_pow_set_pow_effort(trn_cell_extension_pow_t *inp, uint32_t val);
|
||||
/** Return the value of the pow_seed field of the
|
||||
* trn_cell_extension_pow_t in 'inp'
|
||||
*/
|
||||
uint32_t trn_cell_extension_pow_get_pow_seed(const trn_cell_extension_pow_t *inp);
|
||||
/** Set the value of the pow_seed field of the
|
||||
* trn_cell_extension_pow_t in 'inp' to 'val'. Return 0 on success;
|
||||
* return -1 and set the error code on 'inp' on failure.
|
||||
*/
|
||||
int trn_cell_extension_pow_set_pow_seed(trn_cell_extension_pow_t *inp, uint32_t val);
|
||||
/** Return the (constant) length of the array holding the pow_solution
|
||||
* field of the trn_cell_extension_pow_t in 'inp'.
|
||||
*/
|
||||
size_t trn_cell_extension_pow_getlen_pow_solution(const trn_cell_extension_pow_t *inp);
|
||||
/** Return the element at position 'idx' of the fixed array field
|
||||
* pow_solution of the trn_cell_extension_pow_t in 'inp'.
|
||||
*/
|
||||
uint8_t trn_cell_extension_pow_get_pow_solution(trn_cell_extension_pow_t *inp, size_t idx);
|
||||
/** As trn_cell_extension_pow_get_pow_solution, but take and return a
|
||||
* const pointer
|
||||
*/
|
||||
uint8_t trn_cell_extension_pow_getconst_pow_solution(const trn_cell_extension_pow_t *inp, size_t idx);
|
||||
/** Change the element at position 'idx' of the fixed array field
|
||||
* pow_solution of the trn_cell_extension_pow_t in 'inp', so that it
|
||||
* will hold the value 'elt'.
|
||||
*/
|
||||
int trn_cell_extension_pow_set_pow_solution(trn_cell_extension_pow_t *inp, size_t idx, uint8_t elt);
|
||||
/** Return a pointer to the TRUNNEL_POW_SOLUTION_LEN-element array
|
||||
* field pow_solution of 'inp'.
|
||||
*/
|
||||
uint8_t * trn_cell_extension_pow_getarray_pow_solution(trn_cell_extension_pow_t *inp);
|
||||
/** As trn_cell_extension_pow_get_pow_solution, but take and return a
|
||||
* const pointer
|
||||
*/
|
||||
const uint8_t * trn_cell_extension_pow_getconstarray_pow_solution(const trn_cell_extension_pow_t *inp);
|
||||
/** Return a newly allocated trn_cell_introduce1 with all elements set
|
||||
* to zero.
|
||||
*/
|
||||
|
@ -73,3 +73,36 @@ struct trn_cell_introduce_encrypted {
|
||||
/* Optional padding. This might be empty or not. */
|
||||
u8 pad[];
|
||||
};
|
||||
|
||||
/*
|
||||
* INTRODUCE1 cell (encrypted section) extensions.
|
||||
*/
|
||||
|
||||
/* Cell extension type PoW. */
|
||||
const TRUNNEL_CELL_EXTENSION_TYPE_POW = 0x01;
|
||||
|
||||
/*
|
||||
* HRPR: PoW Solution Extension. Proposal 327.
|
||||
*/
|
||||
|
||||
const TRUNNEL_POW_NONCE_LEN = 16;
|
||||
const TRUNNEL_POW_SOLUTION_LEN = 16;
|
||||
/* Version 1 is based on Equi-X scheme. */
|
||||
const TRUNNEL_POW_EQUIX = 0x01;
|
||||
|
||||
struct trn_cell_extension_pow {
|
||||
/* Type of PoW system used. */
|
||||
u8 pow_version IN [0x01];
|
||||
|
||||
/* Nonce */
|
||||
u8 pow_nonce[TRUNNEL_POW_NONCE_LEN];
|
||||
|
||||
/* Effort */
|
||||
u32 pow_effort;
|
||||
|
||||
/* First 4 bytes of the seed. */
|
||||
u32 pow_seed;
|
||||
|
||||
/* Solution. */
|
||||
u8 pow_solution[TRUNNEL_POW_SOLUTION_LEN];
|
||||
};
|
||||
|
Loading…
Reference in New Issue
Block a user