Annotation of embedaddon/strongswan/src/libcharon/encoding/payloads/hash_payload.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2011 Martin Willi
! 3: * Copyright (C) 2011 revosec AG
! 4: *
! 5: * This program is free software; you can redistribute it and/or modify it
! 6: * under the terms of the GNU General Public License as published by the
! 7: * Free Software Foundation; either version 2 of the License, or (at your
! 8: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
! 9: *
! 10: * This program is distributed in the hope that it will be useful, but
! 11: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 12: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
! 13: * for more details.
! 14: */
! 15:
! 16: #include <stddef.h>
! 17:
! 18: #include "hash_payload.h"
! 19:
! 20: #include <encoding/payloads/encodings.h>
! 21:
! 22: typedef struct private_hash_payload_t private_hash_payload_t;
! 23:
! 24: /**
! 25: * Private data of an hash_payload_t object.
! 26: */
! 27: struct private_hash_payload_t {
! 28:
! 29: /**
! 30: * Public hash_payload_t interface.
! 31: */
! 32: hash_payload_t public;
! 33:
! 34: /**
! 35: * Next payload type.
! 36: */
! 37: uint8_t next_payload;
! 38:
! 39: /**
! 40: * Reserved byte
! 41: */
! 42: uint8_t reserved;
! 43:
! 44: /**
! 45: * Length of this payload.
! 46: */
! 47: uint16_t payload_length;
! 48:
! 49: /**
! 50: * The contained hash value.
! 51: */
! 52: chunk_t hash;
! 53:
! 54: /**
! 55: * either PLV1_HASH or PLV1_NAT_D
! 56: */
! 57: payload_type_t type;
! 58: };
! 59:
! 60: /**
! 61: * Encoding rules for an IKEv1 hash payload
! 62: */
! 63: static encoding_rule_t encodings[] = {
! 64: /* 1 Byte next payload type, stored in the field next_payload */
! 65: { U_INT_8, offsetof(private_hash_payload_t, next_payload) },
! 66: { RESERVED_BYTE, offsetof(private_hash_payload_t, reserved) },
! 67: /* Length of the whole payload*/
! 68: { PAYLOAD_LENGTH, offsetof(private_hash_payload_t, payload_length) },
! 69: /* Hash Data is from variable size */
! 70: { CHUNK_DATA, offsetof(private_hash_payload_t, hash) },
! 71: };
! 72:
! 73: /*
! 74: 1 2 3
! 75: 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
! 76: +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 77: ! Next Payload ! RESERVED ! Payload Length !
! 78: +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 79: ! !
! 80: ~ Hash Data ~
! 81: ! !
! 82: +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! 83: */
! 84:
! 85: METHOD(payload_t, verify, status_t,
! 86: private_hash_payload_t *this)
! 87: {
! 88: return SUCCESS;
! 89: }
! 90:
! 91: METHOD(payload_t, get_encoding_rules, int,
! 92: private_hash_payload_t *this, encoding_rule_t **rules)
! 93: {
! 94: *rules = encodings;
! 95: return countof(encodings);
! 96: }
! 97:
! 98: METHOD(payload_t, get_header_length, int,
! 99: private_hash_payload_t *this)
! 100: {
! 101: return 4;
! 102: }
! 103:
! 104: METHOD(payload_t, get_type, payload_type_t,
! 105: private_hash_payload_t *this)
! 106: {
! 107: return this->type;
! 108: }
! 109:
! 110: METHOD(payload_t, get_next_type, payload_type_t,
! 111: private_hash_payload_t *this)
! 112: {
! 113: return this->next_payload;
! 114: }
! 115:
! 116: METHOD(payload_t, set_next_type, void,
! 117: private_hash_payload_t *this, payload_type_t type)
! 118: {
! 119: this->next_payload = type;
! 120: }
! 121:
! 122: METHOD(payload_t, get_length, size_t,
! 123: private_hash_payload_t *this)
! 124: {
! 125: return this->payload_length;
! 126: }
! 127:
! 128: METHOD(hash_payload_t, set_hash, void,
! 129: private_hash_payload_t *this, chunk_t hash)
! 130: {
! 131: free(this->hash.ptr);
! 132: this->hash = chunk_clone(hash);
! 133: this->payload_length = get_header_length(this) + hash.len;
! 134: }
! 135:
! 136: METHOD(hash_payload_t, get_hash, chunk_t,
! 137: private_hash_payload_t *this)
! 138: {
! 139: return this->hash;
! 140: }
! 141:
! 142: METHOD2(payload_t, hash_payload_t, destroy, void,
! 143: private_hash_payload_t *this)
! 144: {
! 145: free(this->hash.ptr);
! 146: free(this);
! 147: }
! 148:
! 149: /*
! 150: * Described in header
! 151: */
! 152: hash_payload_t *hash_payload_create(payload_type_t type)
! 153: {
! 154: private_hash_payload_t *this;
! 155:
! 156: INIT(this,
! 157: .public = {
! 158: .payload_interface = {
! 159: .verify = _verify,
! 160: .get_encoding_rules = _get_encoding_rules,
! 161: .get_header_length = _get_header_length,
! 162: .get_length = _get_length,
! 163: .get_next_type = _get_next_type,
! 164: .set_next_type = _set_next_type,
! 165: .get_type = _get_type,
! 166: .destroy = _destroy,
! 167: },
! 168: .set_hash = _set_hash,
! 169: .get_hash = _get_hash,
! 170: .destroy = _destroy,
! 171: },
! 172: .next_payload = PL_NONE,
! 173: .payload_length = get_header_length(this),
! 174: .type = type,
! 175: );
! 176: return &this->public;
! 177: }
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