Annotation of embedaddon/strongswan/src/libcharon/encoding/payloads/auth_payload.c, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (C) 2005-2010 Martin Willi
3: * Copyright (C) 2010 revosec AG
4: * Copyright (C) 2005 Jan Hutter
5: * HSR Hochschule fuer Technik Rapperswil
6: *
7: * This program is free software; you can redistribute it and/or modify it
8: * under the terms of the GNU General Public License as published by the
9: * Free Software Foundation; either version 2 of the License, or (at your
10: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
11: *
12: * This program is distributed in the hope that it will be useful, but
13: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15: * for more details.
16: */
17:
18: #include "auth_payload.h"
19:
20: #include <encoding/payloads/encodings.h>
21:
22: typedef struct private_auth_payload_t private_auth_payload_t;
23:
24: /**
25: * Private data of an auth_payload_t object.
26: *
27: */
28: struct private_auth_payload_t {
29:
30: /**
31: * Public auth_payload_t interface.
32: */
33: auth_payload_t public;
34:
35: /**
36: * Next payload type.
37: */
38: uint8_t next_payload;
39:
40: /**
41: * Critical flag.
42: */
43: bool critical;
44:
45: /**
46: * Reserved bits
47: */
48: bool reserved_bit[7];
49:
50: /**
51: * Reserved bytes
52: */
53: uint8_t reserved_byte[3];
54:
55: /**
56: * Length of this payload.
57: */
58: uint16_t payload_length;
59:
60: /**
61: * Method of the AUTH Data.
62: */
63: uint8_t auth_method;
64:
65: /**
66: * The contained auth data value.
67: */
68: chunk_t auth_data;
69: };
70:
71: /**
72: * Encoding rules to parse or generate a AUTH payload
73: *
74: * The defined offsets are the positions in a object of type
75: * private_auth_payload_t.
76: */
77: static encoding_rule_t encodings[] = {
78: /* 1 Byte next payload type, stored in the field next_payload */
79: { U_INT_8, offsetof(private_auth_payload_t, next_payload) },
80: /* the critical bit */
81: { FLAG, offsetof(private_auth_payload_t, critical) },
82: /* 7 Bit reserved bits */
83: { RESERVED_BIT, offsetof(private_auth_payload_t, reserved_bit[0]) },
84: { RESERVED_BIT, offsetof(private_auth_payload_t, reserved_bit[1]) },
85: { RESERVED_BIT, offsetof(private_auth_payload_t, reserved_bit[2]) },
86: { RESERVED_BIT, offsetof(private_auth_payload_t, reserved_bit[3]) },
87: { RESERVED_BIT, offsetof(private_auth_payload_t, reserved_bit[4]) },
88: { RESERVED_BIT, offsetof(private_auth_payload_t, reserved_bit[5]) },
89: { RESERVED_BIT, offsetof(private_auth_payload_t, reserved_bit[6]) },
90: /* Length of the whole payload*/
91: { PAYLOAD_LENGTH, offsetof(private_auth_payload_t, payload_length) },
92: /* 1 Byte AUTH type*/
93: { U_INT_8, offsetof(private_auth_payload_t, auth_method) },
94: /* 3 reserved bytes */
95: { RESERVED_BYTE, offsetof(private_auth_payload_t, reserved_byte[0]) },
96: { RESERVED_BYTE, offsetof(private_auth_payload_t, reserved_byte[1]) },
97: { RESERVED_BYTE, offsetof(private_auth_payload_t, reserved_byte[2]) },
98: /* some auth data bytes, length is defined in PAYLOAD_LENGTH */
99: { CHUNK_DATA, offsetof(private_auth_payload_t, auth_data) }
100: };
101:
102: /*
103: 1 2 3
104: 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
105: +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
106: ! Next Payload !C! RESERVED ! Payload Length !
107: +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
108: ! Auth Method ! RESERVED !
109: +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
110: ! !
111: ~ Authentication Data ~
112: ! !
113: +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
114: */
115:
116: METHOD(payload_t, verify, status_t,
117: private_auth_payload_t *this)
118: {
119: return SUCCESS;
120: }
121:
122: METHOD(payload_t, get_encoding_rules, int,
123: private_auth_payload_t *this, encoding_rule_t **rules)
124: {
125: *rules = encodings;
126: return countof(encodings);
127: }
128:
129: METHOD(payload_t, get_header_length, int,
130: private_auth_payload_t *this)
131: {
132: return 8;
133: }
134:
135: METHOD(payload_t, get_type, payload_type_t,
136: private_auth_payload_t *this)
137: {
138: return PLV2_AUTH;
139: }
140:
141: METHOD(payload_t, get_next_type, payload_type_t,
142: private_auth_payload_t *this)
143: {
144: return this->next_payload;
145: }
146:
147: METHOD(payload_t, set_next_type, void,
148: private_auth_payload_t *this, payload_type_t type)
149: {
150: this->next_payload = type;
151: }
152:
153: METHOD(payload_t, get_length, size_t,
154: private_auth_payload_t *this)
155: {
156: return this->payload_length;
157: }
158:
159: METHOD(auth_payload_t, set_auth_method, void,
160: private_auth_payload_t *this, auth_method_t method)
161: {
162: this->auth_method = method;
163: }
164:
165: METHOD(auth_payload_t, get_auth_method, auth_method_t,
166: private_auth_payload_t *this)
167: {
168: return this->auth_method;
169: }
170:
171: METHOD(auth_payload_t, set_data, void,
172: private_auth_payload_t *this, chunk_t data)
173: {
174: free(this->auth_data.ptr);
175: this->auth_data = chunk_clone(data);
176: this->payload_length = get_header_length(this) + this->auth_data.len;
177: }
178:
179: METHOD(auth_payload_t, get_data, chunk_t,
180: private_auth_payload_t *this)
181: {
182: return this->auth_data;
183: }
184:
185: METHOD2(payload_t, auth_payload_t, destroy, void,
186: private_auth_payload_t *this)
187: {
188: free(this->auth_data.ptr);
189: free(this);
190: }
191:
192: /*
193: * Described in header
194: */
195: auth_payload_t *auth_payload_create()
196: {
197: private_auth_payload_t *this;
198:
199: INIT(this,
200: .public = {
201: .payload_interface = {
202: .verify = _verify,
203: .get_encoding_rules = _get_encoding_rules,
204: .get_header_length = _get_header_length,
205: .get_length = _get_length,
206: .get_next_type = _get_next_type,
207: .set_next_type = _set_next_type,
208: .get_type = _get_type,
209: .destroy = _destroy,
210: },
211: .set_auth_method = _set_auth_method,
212: .get_auth_method = _get_auth_method,
213: .set_data = _set_data,
214: .get_data = _get_data,
215: .destroy = _destroy,
216: },
217: .next_payload = PL_NONE,
218: .payload_length = get_header_length(this),
219: );
220: return &this->public;
221: }
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