diff options
Diffstat (limited to 'src/libcharon/encoding/payloads/hash_payload.c')
| -rw-r--r-- | src/libcharon/encoding/payloads/hash_payload.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/src/libcharon/encoding/payloads/hash_payload.c b/src/libcharon/encoding/payloads/hash_payload.c new file mode 100644 index 000000000..0cf63ba67 --- /dev/null +++ b/src/libcharon/encoding/payloads/hash_payload.c @@ -0,0 +1,177 @@ +/* + * Copyright (C) 2011 Martin Willi + * Copyright (C) 2011 revosec AG + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#include <stddef.h> + +#include "hash_payload.h" + +#include <encoding/payloads/encodings.h> + +typedef struct private_hash_payload_t private_hash_payload_t; + +/** + * Private data of an hash_payload_t object. + */ +struct private_hash_payload_t { + + /** + * Public hash_payload_t interface. + */ + hash_payload_t public; + + /** + * Next payload type. + */ + u_int8_t next_payload; + + /** + * Reserved byte + */ + u_int8_t reserved; + + /** + * Length of this payload. + */ + u_int16_t payload_length; + + /** + * The contained hash value. + */ + chunk_t hash; + + /** + * either HASH_V1 or NAT_D_V1 + */ + payload_type_t type; +}; + +/** + * Encoding rules for an IKEv1 hash payload + */ +static encoding_rule_t encodings[] = { + /* 1 Byte next payload type, stored in the field next_payload */ + { U_INT_8, offsetof(private_hash_payload_t, next_payload) }, + { RESERVED_BYTE, offsetof(private_hash_payload_t, reserved) }, + /* Length of the whole payload*/ + { PAYLOAD_LENGTH, offsetof(private_hash_payload_t, payload_length) }, + /* Hash Data is from variable size */ + { CHUNK_DATA, offsetof(private_hash_payload_t, hash) }, +}; + +/* + 1 2 3 + 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! Next Payload ! RESERVED ! Payload Length ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! ! + ~ Hash Data ~ + ! ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +*/ + +METHOD(payload_t, verify, status_t, + private_hash_payload_t *this) +{ + return SUCCESS; +} + +METHOD(payload_t, get_encoding_rules, int, + private_hash_payload_t *this, encoding_rule_t **rules) +{ + *rules = encodings; + return countof(encodings); +} + +METHOD(payload_t, get_header_length, int, + private_hash_payload_t *this) +{ + return 4; +} + +METHOD(payload_t, get_type, payload_type_t, + private_hash_payload_t *this) +{ + return this->type; +} + +METHOD(payload_t, get_next_type, payload_type_t, + private_hash_payload_t *this) +{ + return this->next_payload; +} + +METHOD(payload_t, set_next_type, void, + private_hash_payload_t *this, payload_type_t type) +{ + this->next_payload = type; +} + +METHOD(payload_t, get_length, size_t, + private_hash_payload_t *this) +{ + return this->payload_length; +} + +METHOD(hash_payload_t, set_hash, void, + private_hash_payload_t *this, chunk_t hash) +{ + free(this->hash.ptr); + this->hash = chunk_clone(hash); + this->payload_length = get_header_length(this) + hash.len; +} + +METHOD(hash_payload_t, get_hash, chunk_t, + private_hash_payload_t *this) +{ + return this->hash; +} + +METHOD2(payload_t, hash_payload_t, destroy, void, + private_hash_payload_t *this) +{ + free(this->hash.ptr); + free(this); +} + +/* + * Described in header + */ +hash_payload_t *hash_payload_create(payload_type_t type) +{ + private_hash_payload_t *this; + + INIT(this, + .public = { + .payload_interface = { + .verify = _verify, + .get_encoding_rules = _get_encoding_rules, + .get_header_length = _get_header_length, + .get_length = _get_length, + .get_next_type = _get_next_type, + .set_next_type = _set_next_type, + .get_type = _get_type, + .destroy = _destroy, + }, + .set_hash = _set_hash, + .get_hash = _get_hash, + .destroy = _destroy, + }, + .next_payload = NO_PAYLOAD, + .payload_length = get_header_length(this), + .type = type, + ); + return &this->public; +} |