diff options
Diffstat (limited to 'src/trunnel/link_handshake.c')
| -rw-r--r-- | src/trunnel/link_handshake.c | 1891 |
1 files changed, 1891 insertions, 0 deletions
diff --git a/src/trunnel/link_handshake.c b/src/trunnel/link_handshake.c new file mode 100644 index 0000000000..3ef7341ae9 --- /dev/null +++ b/src/trunnel/link_handshake.c @@ -0,0 +1,1891 @@ +/* link_handshake.c -- generated by Trunnel v1.4.4. + * https://gitweb.torproject.org/trunnel.git + * You probably shouldn't edit this file. + */ +#include <stdlib.h> +#include "trunnel-impl.h" + +#include "link_handshake.h" + +#define TRUNNEL_SET_ERROR_CODE(obj) \ + do { \ + (obj)->trunnel_error_code_ = 1; \ + } while (0) + +#if defined(__COVERITY__) || defined(__clang_analyzer__) +/* If we're runnning a static analysis tool, we don't want it to complain + * that some of our remaining-bytes checks are dead-code. */ +int linkhandshake_deadcode_dummy__ = 0; +#define OR_DEADCODE_DUMMY || linkhandshake_deadcode_dummy__ +#else +#define OR_DEADCODE_DUMMY +#endif + +#define CHECK_REMAINING(nbytes, label) \ + do { \ + if (remaining < (nbytes) OR_DEADCODE_DUMMY) { \ + goto label; \ + } \ + } while (0) + +auth_challenge_cell_t * +auth_challenge_cell_new(void) +{ + auth_challenge_cell_t *val = trunnel_calloc(1, sizeof(auth_challenge_cell_t)); + if (NULL == val) + return NULL; + return val; +} + +/** Release all storage held inside 'obj', but do not free 'obj'. + */ +static void +auth_challenge_cell_clear(auth_challenge_cell_t *obj) +{ + (void) obj; + TRUNNEL_DYNARRAY_WIPE(&obj->methods); + TRUNNEL_DYNARRAY_CLEAR(&obj->methods); +} + +void +auth_challenge_cell_free(auth_challenge_cell_t *obj) +{ + if (obj == NULL) + return; + auth_challenge_cell_clear(obj); + trunnel_memwipe(obj, sizeof(auth_challenge_cell_t)); + trunnel_free_(obj); +} + +size_t +auth_challenge_cell_getlen_challenge(const auth_challenge_cell_t *inp) +{ + (void)inp; return 32; +} + +uint8_t +auth_challenge_cell_get_challenge(const auth_challenge_cell_t *inp, size_t idx) +{ + trunnel_assert(idx < 32); + return inp->challenge[idx]; +} + +int +auth_challenge_cell_set_challenge(auth_challenge_cell_t *inp, size_t idx, uint8_t elt) +{ + trunnel_assert(idx < 32); + inp->challenge[idx] = elt; + return 0; +} + +uint8_t * +auth_challenge_cell_getarray_challenge(auth_challenge_cell_t *inp) +{ + return inp->challenge; +} +uint16_t +auth_challenge_cell_get_n_methods(auth_challenge_cell_t *inp) +{ + return inp->n_methods; +} +int +auth_challenge_cell_set_n_methods(auth_challenge_cell_t *inp, uint16_t val) +{ + inp->n_methods = val; + return 0; +} +size_t +auth_challenge_cell_getlen_methods(const auth_challenge_cell_t *inp) +{ + return TRUNNEL_DYNARRAY_LEN(&inp->methods); +} + +uint16_t +auth_challenge_cell_get_methods(auth_challenge_cell_t *inp, size_t idx) +{ + return TRUNNEL_DYNARRAY_GET(&inp->methods, idx); +} + +int +auth_challenge_cell_set_methods(auth_challenge_cell_t *inp, size_t idx, uint16_t elt) +{ + TRUNNEL_DYNARRAY_SET(&inp->methods, idx, elt); + return 0; +} +int +auth_challenge_cell_add_methods(auth_challenge_cell_t *inp, uint16_t elt) +{ +#if SIZE_MAX >= UINT16_MAX + if (inp->methods.n_ == UINT16_MAX) + goto trunnel_alloc_failed; +#endif + TRUNNEL_DYNARRAY_ADD(uint16_t, &inp->methods, elt, {}); + return 0; + trunnel_alloc_failed: + TRUNNEL_SET_ERROR_CODE(inp); + return -1; +} + +uint16_t * +auth_challenge_cell_getarray_methods(auth_challenge_cell_t *inp) +{ + return inp->methods.elts_; +} +int +auth_challenge_cell_setlen_methods(auth_challenge_cell_t *inp, size_t newlen) +{ + uint16_t *newptr; +#if UINT16_MAX < SIZE_MAX + if (newlen > UINT16_MAX) + goto trunnel_alloc_failed; +#endif + newptr = trunnel_dynarray_setlen(&inp->methods.allocated_, + &inp->methods.n_, inp->methods.elts_, newlen, + sizeof(inp->methods.elts_[0]), (trunnel_free_fn_t) NULL, + &inp->trunnel_error_code_); + if (newptr == NULL) + goto trunnel_alloc_failed; + inp->methods.elts_ = newptr; + return 0; + trunnel_alloc_failed: + TRUNNEL_SET_ERROR_CODE(inp); + return -1; +} +const char * +auth_challenge_cell_check(const auth_challenge_cell_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->methods) != obj->n_methods) + return "Length mismatch for methods"; + return NULL; +} + +ssize_t +auth_challenge_cell_encoded_len(const auth_challenge_cell_t *obj) +{ + ssize_t result = 0; + + if (NULL != auth_challenge_cell_check(obj)) + return -1; + + + /* Length of u8 challenge[32] */ + result += 32; + + /* Length of u16 n_methods */ + result += 2; + + /* Length of u16 methods[n_methods] */ + result += 2 * TRUNNEL_DYNARRAY_LEN(&obj->methods); + return result; +} +int +auth_challenge_cell_clear_errors(auth_challenge_cell_t *obj) +{ + int r = obj->trunnel_error_code_; + obj->trunnel_error_code_ = 0; + return r; +} +ssize_t +auth_challenge_cell_encode(uint8_t *output, const size_t avail, const auth_challenge_cell_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 = auth_challenge_cell_encoded_len(obj); +#endif + + if (NULL != (msg = auth_challenge_cell_check(obj))) + goto check_failed; + +#ifdef TRUNNEL_CHECK_ENCODED_LEN + trunnel_assert(encoded_len >= 0); +#endif + + /* Encode u8 challenge[32] */ + trunnel_assert(written <= avail); + if (avail - written < 32) + goto truncated; + memcpy(ptr, obj->challenge, 32); + written += 32; ptr += 32; + + /* Encode u16 n_methods */ + trunnel_assert(written <= avail); + if (avail - written < 2) + goto truncated; + trunnel_set_uint16(ptr, trunnel_htons(obj->n_methods)); + written += 2; ptr += 2; + + /* Encode u16 methods[n_methods] */ + { + + unsigned idx; + for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->methods); ++idx) { + trunnel_assert(written <= avail); + if (avail - written < 2) + goto truncated; + trunnel_set_uint16(ptr, trunnel_htons(TRUNNEL_DYNARRAY_GET(&obj->methods, idx))); + written += 2; ptr += 2; + } + } + + + 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 auth_challenge_cell_parse(), but do not allocate the output + * object. + */ +static ssize_t +auth_challenge_cell_parse_into(auth_challenge_cell_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 challenge[32] */ + CHECK_REMAINING(32, truncated); + memcpy(obj->challenge, ptr, 32); + remaining -= 32; ptr += 32; + + /* Parse u16 n_methods */ + CHECK_REMAINING(2, truncated); + obj->n_methods = trunnel_ntohs(trunnel_get_uint16(ptr)); + remaining -= 2; ptr += 2; + + /* Parse u16 methods[n_methods] */ + TRUNNEL_DYNARRAY_EXPAND(uint16_t, &obj->methods, obj->n_methods, {}); + { + uint16_t elt; + unsigned idx; + for (idx = 0; idx < obj->n_methods; ++idx) { + CHECK_REMAINING(2, truncated); + elt = trunnel_ntohs(trunnel_get_uint16(ptr)); + remaining -= 2; ptr += 2; + TRUNNEL_DYNARRAY_ADD(uint16_t, &obj->methods, elt, {}); + } + } + trunnel_assert(ptr + remaining == input + len_in); + return len_in - remaining; + + truncated: + return -2; + trunnel_alloc_failed: + return -1; +} + +ssize_t +auth_challenge_cell_parse(auth_challenge_cell_t **output, const uint8_t *input, const size_t len_in) +{ + ssize_t result; + *output = auth_challenge_cell_new(); + if (NULL == *output) + return -1; + result = auth_challenge_cell_parse_into(*output, input, len_in); + if (result < 0) { + auth_challenge_cell_free(*output); + *output = NULL; + } + return result; +} +auth_ctx_t * +auth_ctx_new(void) +{ + auth_ctx_t *val = trunnel_calloc(1, sizeof(auth_ctx_t)); + if (NULL == val) + return NULL; + return val; +} + +/** Release all storage held inside 'obj', but do not free 'obj'. + */ +static void +auth_ctx_clear(auth_ctx_t *obj) +{ + (void) obj; +} + +void +auth_ctx_free(auth_ctx_t *obj) +{ + if (obj == NULL) + return; + auth_ctx_clear(obj); + trunnel_memwipe(obj, sizeof(auth_ctx_t)); + trunnel_free_(obj); +} + +uint8_t +auth_ctx_get_is_ed(auth_ctx_t *inp) +{ + return inp->is_ed; +} +int +auth_ctx_set_is_ed(auth_ctx_t *inp, uint8_t val) +{ + inp->is_ed = val; + return 0; +} +certs_cell_cert_t * +certs_cell_cert_new(void) +{ + certs_cell_cert_t *val = trunnel_calloc(1, sizeof(certs_cell_cert_t)); + if (NULL == val) + return NULL; + return val; +} + +/** Release all storage held inside 'obj', but do not free 'obj'. + */ +static void +certs_cell_cert_clear(certs_cell_cert_t *obj) +{ + (void) obj; + TRUNNEL_DYNARRAY_WIPE(&obj->body); + TRUNNEL_DYNARRAY_CLEAR(&obj->body); +} + +void +certs_cell_cert_free(certs_cell_cert_t *obj) +{ + if (obj == NULL) + return; + certs_cell_cert_clear(obj); + trunnel_memwipe(obj, sizeof(certs_cell_cert_t)); + trunnel_free_(obj); +} + +uint8_t +certs_cell_cert_get_cert_type(certs_cell_cert_t *inp) +{ + return inp->cert_type; +} +int +certs_cell_cert_set_cert_type(certs_cell_cert_t *inp, uint8_t val) +{ + inp->cert_type = val; + return 0; +} +uint16_t +certs_cell_cert_get_cert_len(certs_cell_cert_t *inp) +{ + return inp->cert_len; +} +int +certs_cell_cert_set_cert_len(certs_cell_cert_t *inp, uint16_t val) +{ + inp->cert_len = val; + return 0; +} +size_t +certs_cell_cert_getlen_body(const certs_cell_cert_t *inp) +{ + return TRUNNEL_DYNARRAY_LEN(&inp->body); +} + +uint8_t +certs_cell_cert_get_body(certs_cell_cert_t *inp, size_t idx) +{ + return TRUNNEL_DYNARRAY_GET(&inp->body, idx); +} + +int +certs_cell_cert_set_body(certs_cell_cert_t *inp, size_t idx, uint8_t elt) +{ + TRUNNEL_DYNARRAY_SET(&inp->body, idx, elt); + return 0; +} +int +certs_cell_cert_add_body(certs_cell_cert_t *inp, uint8_t elt) +{ +#if SIZE_MAX >= UINT16_MAX + if (inp->body.n_ == UINT16_MAX) + goto trunnel_alloc_failed; +#endif + TRUNNEL_DYNARRAY_ADD(uint8_t, &inp->body, elt, {}); + return 0; + trunnel_alloc_failed: + TRUNNEL_SET_ERROR_CODE(inp); + return -1; +} + +uint8_t * +certs_cell_cert_getarray_body(certs_cell_cert_t *inp) +{ + return inp->body.elts_; +} +int +certs_cell_cert_setlen_body(certs_cell_cert_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->body.allocated_, + &inp->body.n_, inp->body.elts_, newlen, + sizeof(inp->body.elts_[0]), (trunnel_free_fn_t) NULL, + &inp->trunnel_error_code_); + if (newptr == NULL) + goto trunnel_alloc_failed; + inp->body.elts_ = newptr; + return 0; + trunnel_alloc_failed: + TRUNNEL_SET_ERROR_CODE(inp); + return -1; +} +const char * +certs_cell_cert_check(const certs_cell_cert_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->body) != obj->cert_len) + return "Length mismatch for body"; + return NULL; +} + +ssize_t +certs_cell_cert_encoded_len(const certs_cell_cert_t *obj) +{ + ssize_t result = 0; + + if (NULL != certs_cell_cert_check(obj)) + return -1; + + + /* Length of u8 cert_type */ + result += 1; + + /* Length of u16 cert_len */ + result += 2; + + /* Length of u8 body[cert_len] */ + result += TRUNNEL_DYNARRAY_LEN(&obj->body); + return result; +} +int +certs_cell_cert_clear_errors(certs_cell_cert_t *obj) +{ + int r = obj->trunnel_error_code_; + obj->trunnel_error_code_ = 0; + return r; +} +ssize_t +certs_cell_cert_encode(uint8_t *output, const size_t avail, const certs_cell_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 = certs_cell_cert_encoded_len(obj); +#endif + + if (NULL != (msg = certs_cell_cert_check(obj))) + goto check_failed; + +#ifdef TRUNNEL_CHECK_ENCODED_LEN + trunnel_assert(encoded_len >= 0); +#endif + + /* 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 u16 cert_len */ + trunnel_assert(written <= avail); + if (avail - written < 2) + goto truncated; + trunnel_set_uint16(ptr, trunnel_htons(obj->cert_len)); + written += 2; ptr += 2; + + /* Encode u8 body[cert_len] */ + { + size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->body); + trunnel_assert(obj->cert_len == elt_len); + trunnel_assert(written <= avail); + if (avail - written < elt_len) + goto truncated; + if (elt_len) + memcpy(ptr, obj->body.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 certs_cell_cert_parse(), but do not allocate the output object. + */ +static ssize_t +certs_cell_cert_parse_into(certs_cell_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 cert_type */ + CHECK_REMAINING(1, truncated); + obj->cert_type = (trunnel_get_uint8(ptr)); + remaining -= 1; ptr += 1; + + /* Parse u16 cert_len */ + CHECK_REMAINING(2, truncated); + obj->cert_len = trunnel_ntohs(trunnel_get_uint16(ptr)); + remaining -= 2; ptr += 2; + + /* Parse u8 body[cert_len] */ + CHECK_REMAINING(obj->cert_len, truncated); + TRUNNEL_DYNARRAY_EXPAND(uint8_t, &obj->body, obj->cert_len, {}); + obj->body.n_ = obj->cert_len; + if (obj->cert_len) + memcpy(obj->body.elts_, ptr, obj->cert_len); + ptr += obj->cert_len; remaining -= obj->cert_len; + trunnel_assert(ptr + remaining == input + len_in); + return len_in - remaining; + + truncated: + return -2; + trunnel_alloc_failed: + return -1; +} + +ssize_t +certs_cell_cert_parse(certs_cell_cert_t **output, const uint8_t *input, const size_t len_in) +{ + ssize_t result; + *output = certs_cell_cert_new(); + if (NULL == *output) + return -1; + result = certs_cell_cert_parse_into(*output, input, len_in); + if (result < 0) { + certs_cell_cert_free(*output); + *output = NULL; + } + return result; +} +rsa_ed_crosscert_t * +rsa_ed_crosscert_new(void) +{ + rsa_ed_crosscert_t *val = trunnel_calloc(1, sizeof(rsa_ed_crosscert_t)); + if (NULL == val) + return NULL; + return val; +} + +/** Release all storage held inside 'obj', but do not free 'obj'. + */ +static void +rsa_ed_crosscert_clear(rsa_ed_crosscert_t *obj) +{ + (void) obj; + TRUNNEL_DYNARRAY_WIPE(&obj->sig); + TRUNNEL_DYNARRAY_CLEAR(&obj->sig); +} + +void +rsa_ed_crosscert_free(rsa_ed_crosscert_t *obj) +{ + if (obj == NULL) + return; + rsa_ed_crosscert_clear(obj); + trunnel_memwipe(obj, sizeof(rsa_ed_crosscert_t)); + trunnel_free_(obj); +} + +size_t +rsa_ed_crosscert_getlen_ed_key(const rsa_ed_crosscert_t *inp) +{ + (void)inp; return 32; +} + +uint8_t +rsa_ed_crosscert_get_ed_key(const rsa_ed_crosscert_t *inp, size_t idx) +{ + trunnel_assert(idx < 32); + return inp->ed_key[idx]; +} + +int +rsa_ed_crosscert_set_ed_key(rsa_ed_crosscert_t *inp, size_t idx, uint8_t elt) +{ + trunnel_assert(idx < 32); + inp->ed_key[idx] = elt; + return 0; +} + +uint8_t * +rsa_ed_crosscert_getarray_ed_key(rsa_ed_crosscert_t *inp) +{ + return inp->ed_key; +} +uint32_t +rsa_ed_crosscert_get_expiration(rsa_ed_crosscert_t *inp) +{ + return inp->expiration; +} +int +rsa_ed_crosscert_set_expiration(rsa_ed_crosscert_t *inp, uint32_t val) +{ + inp->expiration = val; + return 0; +} +const uint8_t * +rsa_ed_crosscert_get_end_of_signed(const rsa_ed_crosscert_t *inp) +{ + return inp->end_of_signed; +} +uint8_t +rsa_ed_crosscert_get_sig_len(rsa_ed_crosscert_t *inp) +{ + return inp->sig_len; +} +int +rsa_ed_crosscert_set_sig_len(rsa_ed_crosscert_t *inp, uint8_t val) +{ + inp->sig_len = val; + return 0; +} +size_t +rsa_ed_crosscert_getlen_sig(const rsa_ed_crosscert_t *inp) +{ + return TRUNNEL_DYNARRAY_LEN(&inp->sig); +} + +uint8_t +rsa_ed_crosscert_get_sig(rsa_ed_crosscert_t *inp, size_t idx) +{ + return TRUNNEL_DYNARRAY_GET(&inp->sig, idx); +} + +int +rsa_ed_crosscert_set_sig(rsa_ed_crosscert_t *inp, size_t idx, uint8_t elt) +{ + TRUNNEL_DYNARRAY_SET(&inp->sig, idx, elt); + return 0; +} +int +rsa_ed_crosscert_add_sig(rsa_ed_crosscert_t *inp, uint8_t elt) +{ +#if SIZE_MAX >= UINT8_MAX + if (inp->sig.n_ == UINT8_MAX) + goto trunnel_alloc_failed; +#endif + TRUNNEL_DYNARRAY_ADD(uint8_t, &inp->sig, elt, {}); + return 0; + trunnel_alloc_failed: + TRUNNEL_SET_ERROR_CODE(inp); + return -1; +} + +uint8_t * +rsa_ed_crosscert_getarray_sig(rsa_ed_crosscert_t *inp) +{ + return inp->sig.elts_; +} +int +rsa_ed_crosscert_setlen_sig(rsa_ed_crosscert_t *inp, size_t newlen) +{ + uint8_t *newptr; +#if UINT8_MAX < SIZE_MAX + if (newlen > UINT8_MAX) + goto trunnel_alloc_failed; +#endif + newptr = trunnel_dynarray_setlen(&inp->sig.allocated_, + &inp->sig.n_, inp->sig.elts_, newlen, + sizeof(inp->sig.elts_[0]), (trunnel_free_fn_t) NULL, + &inp->trunnel_error_code_); + if (newptr == NULL) + goto trunnel_alloc_failed; + inp->sig.elts_ = newptr; + return 0; + trunnel_alloc_failed: + TRUNNEL_SET_ERROR_CODE(inp); + return -1; +} +const char * +rsa_ed_crosscert_check(const rsa_ed_crosscert_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->sig) != obj->sig_len) + return "Length mismatch for sig"; + return NULL; +} + +ssize_t +rsa_ed_crosscert_encoded_len(const rsa_ed_crosscert_t *obj) +{ + ssize_t result = 0; + + if (NULL != rsa_ed_crosscert_check(obj)) + return -1; + + + /* Length of u8 ed_key[32] */ + result += 32; + + /* Length of u32 expiration */ + result += 4; + + /* Length of u8 sig_len */ + result += 1; + + /* Length of u8 sig[sig_len] */ + result += TRUNNEL_DYNARRAY_LEN(&obj->sig); + return result; +} +int +rsa_ed_crosscert_clear_errors(rsa_ed_crosscert_t *obj) +{ + int r = obj->trunnel_error_code_; + obj->trunnel_error_code_ = 0; + return r; +} +ssize_t +rsa_ed_crosscert_encode(uint8_t *output, const size_t avail, const rsa_ed_crosscert_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 = rsa_ed_crosscert_encoded_len(obj); +#endif + + if (NULL != (msg = rsa_ed_crosscert_check(obj))) + goto check_failed; + +#ifdef TRUNNEL_CHECK_ENCODED_LEN + trunnel_assert(encoded_len >= 0); +#endif + + /* Encode u8 ed_key[32] */ + trunnel_assert(written <= avail); + if (avail - written < 32) + goto truncated; + memcpy(ptr, obj->ed_key, 32); + written += 32; ptr += 32; + + /* Encode u32 expiration */ + trunnel_assert(written <= avail); + if (avail - written < 4) + goto truncated; + trunnel_set_uint32(ptr, trunnel_htonl(obj->expiration)); + written += 4; ptr += 4; + + /* Encode u8 sig_len */ + trunnel_assert(written <= avail); + if (avail - written < 1) + goto truncated; + trunnel_set_uint8(ptr, (obj->sig_len)); + written += 1; ptr += 1; + + /* Encode u8 sig[sig_len] */ + { + size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->sig); + trunnel_assert(obj->sig_len == elt_len); + trunnel_assert(written <= avail); + if (avail - written < elt_len) + goto truncated; + if (elt_len) + memcpy(ptr, obj->sig.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 rsa_ed_crosscert_parse(), but do not allocate the output + * object. + */ +static ssize_t +rsa_ed_crosscert_parse_into(rsa_ed_crosscert_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 ed_key[32] */ + CHECK_REMAINING(32, truncated); + memcpy(obj->ed_key, ptr, 32); + remaining -= 32; ptr += 32; + + /* Parse u32 expiration */ + CHECK_REMAINING(4, truncated); + obj->expiration = trunnel_ntohl(trunnel_get_uint32(ptr)); + remaining -= 4; ptr += 4; + obj->end_of_signed = ptr; + + /* Parse u8 sig_len */ + CHECK_REMAINING(1, truncated); + obj->sig_len = (trunnel_get_uint8(ptr)); + remaining -= 1; ptr += 1; + + /* Parse u8 sig[sig_len] */ + CHECK_REMAINING(obj->sig_len, truncated); + TRUNNEL_DYNARRAY_EXPAND(uint8_t, &obj->sig, obj->sig_len, {}); + obj->sig.n_ = obj->sig_len; + if (obj->sig_len) + memcpy(obj->sig.elts_, ptr, obj->sig_len); + ptr += obj->sig_len; remaining -= obj->sig_len; + trunnel_assert(ptr + remaining == input + len_in); + return len_in - remaining; + + truncated: + return -2; + trunnel_alloc_failed: + return -1; +} + +ssize_t +rsa_ed_crosscert_parse(rsa_ed_crosscert_t **output, const uint8_t *input, const size_t len_in) +{ + ssize_t result; + *output = rsa_ed_crosscert_new(); + if (NULL == *output) + return -1; + result = rsa_ed_crosscert_parse_into(*output, input, len_in); + if (result < 0) { + rsa_ed_crosscert_free(*output); + *output = NULL; + } + return result; +} +auth1_t * +auth1_new(void) +{ + auth1_t *val = trunnel_calloc(1, sizeof(auth1_t)); + if (NULL == val) + return NULL; + return val; +} + +/** Release all storage held inside 'obj', but do not free 'obj'. + */ +static void +auth1_clear(auth1_t *obj) +{ + (void) obj; + TRUNNEL_DYNARRAY_WIPE(&obj->sig); + TRUNNEL_DYNARRAY_CLEAR(&obj->sig); +} + +void +auth1_free(auth1_t *obj) +{ + if (obj == NULL) + return; + auth1_clear(obj); + trunnel_memwipe(obj, sizeof(auth1_t)); + trunnel_free_(obj); +} + +size_t +auth1_getlen_type(const auth1_t *inp) +{ + (void)inp; return 8; +} + +uint8_t +auth1_get_type(const auth1_t *inp, size_t idx) +{ + trunnel_assert(idx < 8); + return inp->type[idx]; +} + +int +auth1_set_type(auth1_t *inp, size_t idx, uint8_t elt) +{ + trunnel_assert(idx < 8); + inp->type[idx] = elt; + return 0; +} + +uint8_t * +auth1_getarray_type(auth1_t *inp) +{ + return inp->type; +} +size_t +auth1_getlen_cid(const auth1_t *inp) +{ + (void)inp; return 32; +} + +uint8_t +auth1_get_cid(const auth1_t *inp, size_t idx) +{ + trunnel_assert(idx < 32); + return inp->cid[idx]; +} + +int +auth1_set_cid(auth1_t *inp, size_t idx, uint8_t elt) +{ + trunnel_assert(idx < 32); + inp->cid[idx] = elt; + return 0; +} + +uint8_t * +auth1_getarray_cid(auth1_t *inp) +{ + return inp->cid; +} +size_t +auth1_getlen_sid(const auth1_t *inp) +{ + (void)inp; return 32; +} + +uint8_t +auth1_get_sid(const auth1_t *inp, size_t idx) +{ + trunnel_assert(idx < 32); + return inp->sid[idx]; +} + +int +auth1_set_sid(auth1_t *inp, size_t idx, uint8_t elt) +{ + trunnel_assert(idx < 32); + inp->sid[idx] = elt; + return 0; +} + +uint8_t * +auth1_getarray_sid(auth1_t *inp) +{ + return inp->sid; +} +size_t +auth1_getlen_u1_cid_ed(const auth1_t *inp) +{ + (void)inp; return 32; +} + +uint8_t +auth1_get_u1_cid_ed(const auth1_t *inp, size_t idx) +{ + trunnel_assert(idx < 32); + return inp->u1_cid_ed[idx]; +} + +int +auth1_set_u1_cid_ed(auth1_t *inp, size_t idx, uint8_t elt) +{ + trunnel_assert(idx < 32); + inp->u1_cid_ed[idx] = elt; + return 0; +} + +uint8_t * +auth1_getarray_u1_cid_ed(auth1_t *inp) +{ + return inp->u1_cid_ed; +} +size_t +auth1_getlen_u1_sid_ed(const auth1_t *inp) +{ + (void)inp; return 32; +} + +uint8_t +auth1_get_u1_sid_ed(const auth1_t *inp, size_t idx) +{ + trunnel_assert(idx < 32); + return inp->u1_sid_ed[idx]; +} + +int +auth1_set_u1_sid_ed(auth1_t *inp, size_t idx, uint8_t elt) +{ + trunnel_assert(idx < 32); + inp->u1_sid_ed[idx] = elt; + return 0; +} + +uint8_t * +auth1_getarray_u1_sid_ed(auth1_t *inp) +{ + return inp->u1_sid_ed; +} +size_t +auth1_getlen_slog(const auth1_t *inp) +{ + (void)inp; return 32; +} + +uint8_t +auth1_get_slog(const auth1_t *inp, size_t idx) +{ + trunnel_assert(idx < 32); + return inp->slog[idx]; +} + +int +auth1_set_slog(auth1_t *inp, size_t idx, uint8_t elt) +{ + trunnel_assert(idx < 32); + inp->slog[idx] = elt; + return 0; +} + +uint8_t * +auth1_getarray_slog(auth1_t *inp) +{ + return inp->slog; +} +size_t +auth1_getlen_clog(const auth1_t *inp) +{ + (void)inp; return 32; +} + +uint8_t +auth1_get_clog(const auth1_t *inp, size_t idx) +{ + trunnel_assert(idx < 32); + return inp->clog[idx]; +} + +int +auth1_set_clog(auth1_t *inp, size_t idx, uint8_t elt) +{ + trunnel_assert(idx < 32); + inp->clog[idx] = elt; + return 0; +} + +uint8_t * +auth1_getarray_clog(auth1_t *inp) +{ + return inp->clog; +} +size_t +auth1_getlen_scert(const auth1_t *inp) +{ + (void)inp; return 32; +} + +uint8_t +auth1_get_scert(const auth1_t *inp, size_t idx) +{ + trunnel_assert(idx < 32); + return inp->scert[idx]; +} + +int +auth1_set_scert(auth1_t *inp, size_t idx, uint8_t elt) +{ + trunnel_assert(idx < 32); + inp->scert[idx] = elt; + return 0; +} + +uint8_t * +auth1_getarray_scert(auth1_t *inp) +{ + return inp->scert; +} +size_t +auth1_getlen_tlssecrets(const auth1_t *inp) +{ + (void)inp; return 32; +} + +uint8_t +auth1_get_tlssecrets(const auth1_t *inp, size_t idx) +{ + trunnel_assert(idx < 32); + return inp->tlssecrets[idx]; +} + +int +auth1_set_tlssecrets(auth1_t *inp, size_t idx, uint8_t elt) +{ + trunnel_assert(idx < 32); + inp->tlssecrets[idx] = elt; + return 0; +} + +uint8_t * +auth1_getarray_tlssecrets(auth1_t *inp) +{ + return inp->tlssecrets; +} +const uint8_t * +auth1_get_end_of_fixed_part(const auth1_t *inp) +{ + return inp->end_of_fixed_part; +} +size_t +auth1_getlen_rand(const auth1_t *inp) +{ + (void)inp; return 24; +} + +uint8_t +auth1_get_rand(const auth1_t *inp, size_t idx) +{ + trunnel_assert(idx < 24); + return inp->rand[idx]; +} + +int +auth1_set_rand(auth1_t *inp, size_t idx, uint8_t elt) +{ + trunnel_assert(idx < 24); + inp->rand[idx] = elt; + return 0; +} + +uint8_t * +auth1_getarray_rand(auth1_t *inp) +{ + return inp->rand; +} +const uint8_t * +auth1_get_end_of_signed(const auth1_t *inp) +{ + return inp->end_of_signed; +} +size_t +auth1_getlen_sig(const auth1_t *inp) +{ + return TRUNNEL_DYNARRAY_LEN(&inp->sig); +} + +uint8_t +auth1_get_sig(auth1_t *inp, size_t idx) +{ + return TRUNNEL_DYNARRAY_GET(&inp->sig, idx); +} + +int +auth1_set_sig(auth1_t *inp, size_t idx, uint8_t elt) +{ + TRUNNEL_DYNARRAY_SET(&inp->sig, idx, elt); + return 0; +} +int +auth1_add_sig(auth1_t *inp, uint8_t elt) +{ + TRUNNEL_DYNARRAY_ADD(uint8_t, &inp->sig, elt, {}); + return 0; + trunnel_alloc_failed: + TRUNNEL_SET_ERROR_CODE(inp); + return -1; +} + +uint8_t * +auth1_getarray_sig(auth1_t *inp) +{ + return inp->sig.elts_; +} +int +auth1_setlen_sig(auth1_t *inp, size_t newlen) +{ + uint8_t *newptr; + newptr = trunnel_dynarray_setlen(&inp->sig.allocated_, + &inp->sig.n_, inp->sig.elts_, newlen, + sizeof(inp->sig.elts_[0]), (trunnel_free_fn_t) NULL, + &inp->trunnel_error_code_); + if (newptr == NULL) + goto trunnel_alloc_failed; + inp->sig.elts_ = newptr; + return 0; + trunnel_alloc_failed: + TRUNNEL_SET_ERROR_CODE(inp); + return -1; +} +const char * +auth1_check(const auth1_t *obj, const auth_ctx_t *auth_ctx_ctx) +{ + if (obj == NULL) + return "Object was NULL"; + if (obj->trunnel_error_code_) + return "A set function failed on this object"; + if (auth_ctx_ctx == NULL) + return "Context was NULL"; + switch (auth_ctx_ctx->is_ed) { + + case 0: + break; + + case 1: + break; + + default: + return "Bad tag for union"; + break; + } + return NULL; +} + +ssize_t +auth1_encoded_len(const auth1_t *obj, const auth_ctx_t *auth_ctx_ctx) +{ + ssize_t result = 0; + + if (NULL != auth1_check(obj, auth_ctx_ctx)) + return -1; + + + /* Length of u8 type[8] */ + result += 8; + + /* Length of u8 cid[32] */ + result += 32; + + /* Length of u8 sid[32] */ + result += 32; + switch (auth_ctx_ctx->is_ed) { + + case 0: + break; + + case 1: + + /* Length of u8 u1_cid_ed[32] */ + result += 32; + + /* Length of u8 u1_sid_ed[32] */ + result += 32; + break; + + default: + trunnel_assert(0); + break; + } + + /* Length of u8 slog[32] */ + result += 32; + + /* Length of u8 clog[32] */ + result += 32; + + /* Length of u8 scert[32] */ + result += 32; + + /* Length of u8 tlssecrets[32] */ + result += 32; + + /* Length of u8 rand[24] */ + result += 24; + + /* Length of u8 sig[] */ + result += TRUNNEL_DYNARRAY_LEN(&obj->sig); + return result; +} +int +auth1_clear_errors(auth1_t *obj) +{ + int r = obj->trunnel_error_code_; + obj->trunnel_error_code_ = 0; + return r; +} +ssize_t +auth1_encode(uint8_t *output, const size_t avail, const auth1_t *obj, const auth_ctx_t *auth_ctx_ctx) +{ + 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 = auth1_encoded_len(obj, auth_ctx_ctx); +#endif + + if (NULL != (msg = auth1_check(obj, auth_ctx_ctx))) + goto check_failed; + +#ifdef TRUNNEL_CHECK_ENCODED_LEN + trunnel_assert(encoded_len >= 0); +#endif + + /* Encode u8 type[8] */ + trunnel_assert(written <= avail); + if (avail - written < 8) + goto truncated; + memcpy(ptr, obj->type, 8); + written += 8; ptr += 8; + + /* Encode u8 cid[32] */ + trunnel_assert(written <= avail); + if (avail - written < 32) + goto truncated; + memcpy(ptr, obj->cid, 32); + written += 32; ptr += 32; + + /* Encode u8 sid[32] */ + trunnel_assert(written <= avail); + if (avail - written < 32) + goto truncated; + memcpy(ptr, obj->sid, 32); + written += 32; ptr += 32; + + /* Encode union u1[auth_ctx.is_ed] */ + trunnel_assert(written <= avail); + switch (auth_ctx_ctx->is_ed) { + + case 0: + break; + + case 1: + + /* Encode u8 u1_cid_ed[32] */ + trunnel_assert(written <= avail); + if (avail - written < 32) + goto truncated; + memcpy(ptr, obj->u1_cid_ed, 32); + written += 32; ptr += 32; + + /* Encode u8 u1_sid_ed[32] */ + trunnel_assert(written <= avail); + if (avail - written < 32) + goto truncated; + memcpy(ptr, obj->u1_sid_ed, 32); + written += 32; ptr += 32; + break; + + default: + trunnel_assert(0); + break; + } + + /* Encode u8 slog[32] */ + trunnel_assert(written <= avail); + if (avail - written < 32) + goto truncated; + memcpy(ptr, obj->slog, 32); + written += 32; ptr += 32; + + /* Encode u8 clog[32] */ + trunnel_assert(written <= avail); + if (avail - written < 32) + goto truncated; + memcpy(ptr, obj->clog, 32); + written += 32; ptr += 32; + + /* Encode u8 scert[32] */ + trunnel_assert(written <= avail); + if (avail - written < 32) + goto truncated; + memcpy(ptr, obj->scert, 32); + written += 32; ptr += 32; + + /* Encode u8 tlssecrets[32] */ + trunnel_assert(written <= avail); + if (avail - written < 32) + goto truncated; + memcpy(ptr, obj->tlssecrets, 32); + written += 32; ptr += 32; + + /* Encode u8 rand[24] */ + trunnel_assert(written <= avail); + if (avail - written < 24) + goto truncated; + memcpy(ptr, obj->rand, 24); + written += 24; ptr += 24; + + /* Encode u8 sig[] */ + { + size_t elt_len = TRUNNEL_DYNARRAY_LEN(&obj->sig); + trunnel_assert(written <= avail); + if (avail - written < elt_len) + goto truncated; + if (elt_len) + memcpy(ptr, obj->sig.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 auth1_parse(), but do not allocate the output object. + */ +static ssize_t +auth1_parse_into(auth1_t *obj, const uint8_t *input, const size_t len_in, const auth_ctx_t *auth_ctx_ctx) +{ + const uint8_t *ptr = input; + size_t remaining = len_in; + ssize_t result = 0; + (void)result; + if (auth_ctx_ctx == NULL) + return -1; + + /* Parse u8 type[8] */ + CHECK_REMAINING(8, truncated); + memcpy(obj->type, ptr, 8); + remaining -= 8; ptr += 8; + + /* Parse u8 cid[32] */ + CHECK_REMAINING(32, truncated); + memcpy(obj->cid, ptr, 32); + remaining -= 32; ptr += 32; + + /* Parse u8 sid[32] */ + CHECK_REMAINING(32, truncated); + memcpy(obj->sid, ptr, 32); + remaining -= 32; ptr += 32; + + /* Parse union u1[auth_ctx.is_ed] */ + switch (auth_ctx_ctx->is_ed) { + + case 0: + break; + + case 1: + + /* Parse u8 u1_cid_ed[32] */ + CHECK_REMAINING(32, truncated); + memcpy(obj->u1_cid_ed, ptr, 32); + remaining -= 32; ptr += 32; + + /* Parse u8 u1_sid_ed[32] */ + CHECK_REMAINING(32, truncated); + memcpy(obj->u1_sid_ed, ptr, 32); + remaining -= 32; ptr += 32; + break; + + default: + goto fail; + break; + } + + /* Parse u8 slog[32] */ + CHECK_REMAINING(32, truncated); + memcpy(obj->slog, ptr, 32); + remaining -= 32; ptr += 32; + + /* Parse u8 clog[32] */ + CHECK_REMAINING(32, truncated); + memcpy(obj->clog, ptr, 32); + remaining -= 32; ptr += 32; + + /* Parse u8 scert[32] */ + CHECK_REMAINING(32, truncated); + memcpy(obj->scert, ptr, 32); + remaining -= 32; ptr += 32; + + /* Parse u8 tlssecrets[32] */ + CHECK_REMAINING(32, truncated); + memcpy(obj->tlssecrets, ptr, 32); + remaining -= 32; ptr += 32; + obj->end_of_fixed_part = ptr; + + /* Parse u8 rand[24] */ + CHECK_REMAINING(24, truncated); + memcpy(obj->rand, ptr, 24); + remaining -= 24; ptr += 24; + obj->end_of_signed = ptr; + + /* Parse u8 sig[] */ + TRUNNEL_DYNARRAY_EXPAND(uint8_t, &obj->sig, remaining, {}); + obj->sig.n_ = remaining; + if (remaining) + memcpy(obj->sig.elts_, ptr, remaining); + ptr += remaining; remaining -= remaining; + 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 +auth1_parse(auth1_t **output, const uint8_t *input, const size_t len_in, const auth_ctx_t *auth_ctx_ctx) +{ + ssize_t result; + *output = auth1_new(); + if (NULL == *output) + return -1; + result = auth1_parse_into(*output, input, len_in, auth_ctx_ctx); + if (result < 0) { + auth1_free(*output); + *output = NULL; + } + return result; +} +certs_cell_t * +certs_cell_new(void) +{ + certs_cell_t *val = trunnel_calloc(1, sizeof(certs_cell_t)); + if (NULL == val) + return NULL; + return val; +} + +/** Release all storage held inside 'obj', but do not free 'obj'. + */ +static void +certs_cell_clear(certs_cell_t *obj) +{ + (void) obj; + { + + unsigned idx; + for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->certs); ++idx) { + certs_cell_cert_free(TRUNNEL_DYNARRAY_GET(&obj->certs, idx)); + } + } + TRUNNEL_DYNARRAY_WIPE(&obj->certs); + TRUNNEL_DYNARRAY_CLEAR(&obj->certs); +} + +void +certs_cell_free(certs_cell_t *obj) +{ + if (obj == NULL) + return; + certs_cell_clear(obj); + trunnel_memwipe(obj, sizeof(certs_cell_t)); + trunnel_free_(obj); +} + +uint8_t +certs_cell_get_n_certs(certs_cell_t *inp) +{ + return inp->n_certs; +} +int +certs_cell_set_n_certs(certs_cell_t *inp, uint8_t val) +{ + inp->n_certs = val; + return 0; +} +size_t +certs_cell_getlen_certs(const certs_cell_t *inp) +{ + return TRUNNEL_DYNARRAY_LEN(&inp->certs); +} + +struct certs_cell_cert_st * +certs_cell_get_certs(certs_cell_t *inp, size_t idx) +{ + return TRUNNEL_DYNARRAY_GET(&inp->certs, idx); +} + +int +certs_cell_set_certs(certs_cell_t *inp, size_t idx, struct certs_cell_cert_st * elt) +{ + certs_cell_cert_t *oldval = TRUNNEL_DYNARRAY_GET(&inp->certs, idx); + if (oldval && oldval != elt) + certs_cell_cert_free(oldval); + return certs_cell_set0_certs(inp, idx, elt); +} +int +certs_cell_set0_certs(certs_cell_t *inp, size_t idx, struct certs_cell_cert_st * elt) +{ + TRUNNEL_DYNARRAY_SET(&inp->certs, idx, elt); + return 0; +} +int +certs_cell_add_certs(certs_cell_t *inp, struct certs_cell_cert_st * elt) +{ +#if SIZE_MAX >= UINT8_MAX + if (inp->certs.n_ == UINT8_MAX) + goto trunnel_alloc_failed; +#endif + TRUNNEL_DYNARRAY_ADD(struct certs_cell_cert_st *, &inp->certs, elt, {}); + return 0; + trunnel_alloc_failed: + TRUNNEL_SET_ERROR_CODE(inp); + return -1; +} + +struct certs_cell_cert_st * * +certs_cell_getarray_certs(certs_cell_t *inp) +{ + return inp->certs.elts_; +} +int +certs_cell_setlen_certs(certs_cell_t *inp, size_t newlen) +{ + struct certs_cell_cert_st * *newptr; +#if UINT8_MAX < SIZE_MAX + if (newlen > UINT8_MAX) + goto trunnel_alloc_failed; +#endif + newptr = trunnel_dynarray_setlen(&inp->certs.allocated_, + &inp->certs.n_, inp->certs.elts_, newlen, + sizeof(inp->certs.elts_[0]), (trunnel_free_fn_t) certs_cell_cert_free, + &inp->trunnel_error_code_); + if (newptr == NULL) + goto trunnel_alloc_failed; + inp->certs.elts_ = newptr; + return 0; + trunnel_alloc_failed: + TRUNNEL_SET_ERROR_CODE(inp); + return -1; +} +const char * +certs_cell_check(const certs_cell_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->certs); ++idx) { + if (NULL != (msg = certs_cell_cert_check(TRUNNEL_DYNARRAY_GET(&obj->certs, idx)))) + return msg; + } + } + if (TRUNNEL_DYNARRAY_LEN(&obj->certs) != obj->n_certs) + return "Length mismatch for certs"; + return NULL; +} + +ssize_t +certs_cell_encoded_len(const certs_cell_t *obj) +{ + ssize_t result = 0; + + if (NULL != certs_cell_check(obj)) + return -1; + + + /* Length of u8 n_certs */ + result += 1; + + /* Length of struct certs_cell_cert certs[n_certs] */ + { + + unsigned idx; + for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->certs); ++idx) { + result += certs_cell_cert_encoded_len(TRUNNEL_DYNARRAY_GET(&obj->certs, idx)); + } + } + return result; +} +int +certs_cell_clear_errors(certs_cell_t *obj) +{ + int r = obj->trunnel_error_code_; + obj->trunnel_error_code_ = 0; + return r; +} +ssize_t +certs_cell_encode(uint8_t *output, const size_t avail, const certs_cell_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 = certs_cell_encoded_len(obj); +#endif + + if (NULL != (msg = certs_cell_check(obj))) + goto check_failed; + +#ifdef TRUNNEL_CHECK_ENCODED_LEN + trunnel_assert(encoded_len >= 0); +#endif + + /* Encode u8 n_certs */ + trunnel_assert(written <= avail); + if (avail - written < 1) + goto truncated; + trunnel_set_uint8(ptr, (obj->n_certs)); + written += 1; ptr += 1; + + /* Encode struct certs_cell_cert certs[n_certs] */ + { + + unsigned idx; + for (idx = 0; idx < TRUNNEL_DYNARRAY_LEN(&obj->certs); ++idx) { + trunnel_assert(written <= avail); + result = certs_cell_cert_encode(ptr, avail - written, TRUNNEL_DYNARRAY_GET(&obj->certs, 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 certs_cell_parse(), but do not allocate the output object. + */ +static ssize_t +certs_cell_parse_into(certs_cell_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_certs */ + CHECK_REMAINING(1, truncated); + obj->n_certs = (trunnel_get_uint8(ptr)); + remaining -= 1; ptr += 1; + + /* Parse struct certs_cell_cert certs[n_certs] */ + TRUNNEL_DYNARRAY_EXPAND(certs_cell_cert_t *, &obj->certs, obj->n_certs, {}); + { + certs_cell_cert_t * elt; + unsigned idx; + for (idx = 0; idx < obj->n_certs; ++idx) { + result = certs_cell_cert_parse(&elt, ptr, remaining); + if (result < 0) + goto relay_fail; + trunnel_assert((size_t)result <= remaining); + remaining -= result; ptr += result; + TRUNNEL_DYNARRAY_ADD(certs_cell_cert_t *, &obj->certs, elt, {certs_cell_cert_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 +certs_cell_parse(certs_cell_t **output, const uint8_t *input, const size_t len_in) +{ + ssize_t result; + *output = certs_cell_new(); + if (NULL == *output) + return -1; + result = certs_cell_parse_into(*output, input, len_in); + if (result < 0) { + certs_cell_free(*output); + *output = NULL; + } + return result; +} |