diff options
Diffstat (limited to 'src/or/onion.h')
| -rw-r--r-- | src/or/onion.h | 118 |
1 files changed, 94 insertions, 24 deletions
diff --git a/src/or/onion.h b/src/or/onion.h index e7626f9709..33bf341bbc 100644 --- a/src/or/onion.h +++ b/src/or/onion.h @@ -12,37 +12,107 @@ #ifndef TOR_ONION_H #define TOR_ONION_H -int onion_pending_add(or_circuit_t *circ, char *onionskin); -or_circuit_t *onion_next_task(char **onionskin_out); +struct create_cell_t; +int onion_pending_add(or_circuit_t *circ, struct create_cell_t *onionskin); +or_circuit_t *onion_next_task(struct create_cell_t **onionskin_out); void onion_pending_remove(or_circuit_t *circ); +void clear_pending_onions(void); + +typedef struct server_onion_keys_t { + uint8_t my_identity[DIGEST_LEN]; + crypto_pk_t *onion_key; + crypto_pk_t *last_onion_key; +#ifdef CURVE25519_ENABLED + di_digest256_map_t *curve25519_key_map; + curve25519_keypair_t *junk_keypair; +#endif +} server_onion_keys_t; -int onion_skin_create(crypto_pk_t *router_key, - crypto_dh_t **handshake_state_out, - char *onion_skin_out); +#define MAX_ONIONSKIN_CHALLENGE_LEN 255 +#define MAX_ONIONSKIN_REPLY_LEN 255 -int onion_skin_server_handshake(const char *onion_skin, - crypto_pk_t *private_key, - crypto_pk_t *prev_private_key, - char *handshake_reply_out, - char *key_out, - size_t key_out_len); +void setup_server_onion_keys(server_onion_keys_t *keys); +void release_server_onion_keys(server_onion_keys_t *keys); -int onion_skin_client_handshake(crypto_dh_t *handshake_state, - const char *handshake_reply, - char *key_out, - size_t key_out_len); +void onion_handshake_state_release(onion_handshake_state_t *state); -int fast_server_handshake(const uint8_t *key_in, - uint8_t *handshake_reply_out, - uint8_t *key_out, - size_t key_out_len); +int onion_skin_create(int type, + const extend_info_t *node, + onion_handshake_state_t *state_out, + uint8_t *onion_skin_out); +int onion_skin_server_handshake(int type, + const uint8_t *onion_skin, size_t onionskin_len, + const server_onion_keys_t *keys, + uint8_t *reply_out, + uint8_t *keys_out, size_t key_out_len, + uint8_t *rend_nonce_out); +int onion_skin_client_handshake(int type, + const onion_handshake_state_t *handshake_state, + const uint8_t *reply, size_t reply_len, + uint8_t *keys_out, size_t key_out_len, + uint8_t *rend_authenticator_out); -int fast_client_handshake(const uint8_t *handshake_state, - const uint8_t *handshake_reply_out, - uint8_t *key_out, - size_t key_out_len); +/** A parsed CREATE, CREATE_FAST, or CREATE2 cell. */ +typedef struct create_cell_t { + /** The cell command. One of CREATE{,_FAST,2} */ + uint8_t cell_type; + /** One of the ONION_HANDSHAKE_TYPE_* values */ + uint16_t handshake_type; + /** The number of bytes used in <b>onionskin</b>. */ + uint16_t handshake_len; + /** The client-side message for the circuit creation handshake. */ + uint8_t onionskin[CELL_PAYLOAD_SIZE - 4]; +} create_cell_t; -void clear_pending_onions(void); +/** A parsed CREATED, CREATED_FAST, or CREATED2 cell. */ +typedef struct created_cell_t { + /** The cell command. One of CREATED{,_FAST,2} */ + uint8_t cell_type; + /** The number of bytes used in <b>reply</b>. */ + uint16_t handshake_len; + /** The server-side message for the circuit creation handshake. */ + uint8_t reply[CELL_PAYLOAD_SIZE - 2]; +} created_cell_t; + +/** A parsed RELAY_EXTEND or RELAY_EXTEND2 cell */ +typedef struct extend_cell_t { + /** One of RELAY_EXTEND or RELAY_EXTEND2 */ + uint8_t cell_type; + /** An IPv4 address and port for the node we're connecting to. */ + tor_addr_port_t orport_ipv4; + /** An IPv6 address and port for the node we're connecting to. Not currently + * used. */ + tor_addr_port_t orport_ipv6; + /** Identity fingerprint of the node we're conecting to.*/ + uint8_t node_id[DIGEST_LEN]; + /** The "create cell" embedded in this extend cell. Note that unlike the + * create cells we generate ourself, this once can have a handshake type we + * don't recognize. */ + create_cell_t create_cell; +} extend_cell_t; + +/** A parsed RELAY_EXTEND or RELAY_EXTEND2 cell */ +typedef struct extended_cell_t { + /** One of RELAY_EXTENDED or RELAY_EXTENDED2. */ + uint8_t cell_type; + /** The "created cell" embedded in this extended cell. */ + created_cell_t created_cell; +} extended_cell_t; + +int create_cell_parse(create_cell_t *cell_out, const cell_t *cell_in); +int created_cell_parse(created_cell_t *cell_out, const cell_t *cell_in); +int extend_cell_parse(extend_cell_t *cell_out, uint8_t command, + const uint8_t *payload_in, size_t payload_len); +int extended_cell_parse(extended_cell_t *cell_out, uint8_t command, + const uint8_t *payload_in, size_t payload_len); + +int create_cell_format(cell_t *cell_out, const create_cell_t *cell_in); +int create_cell_format_relayed(cell_t *cell_out, const create_cell_t *cell_in); +int created_cell_format(cell_t *cell_out, const created_cell_t *cell_in); +int extend_cell_format(uint8_t *command_out, uint16_t *len_out, + uint8_t *payload_out, const extend_cell_t *cell_in); +int extended_cell_format(uint8_t *command_out, uint16_t *len_out, + uint8_t *payload_out, const extended_cell_t *cell_in); #endif |