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1.1 misho 1: /*
2: * Copyright (C) 2011-2012 Sansar Choinyambuu
3: * Copyright (C) 2011-2014 Andreas Steffen
4: * HSR Hochschule fuer Technik Rapperswil
5: *
6: * This program is free software; you can redistribute it and/or modify it
7: * under the terms of the GNU General Public License as published by the
8: * Free Software Foundation; either version 2 of the License, or (at your
9: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
10: *
11: * This program is distributed in the hope that it will be useful, but
12: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14: * for more details.
15: */
16:
17: #include "tcg_pts_attr_get_aik.h"
18:
19: #include <pa_tnc/pa_tnc_msg.h>
20: #include <bio/bio_writer.h>
21: #include <bio/bio_reader.h>
22: #include <utils/debug.h>
23:
24: typedef struct private_tcg_pts_attr_get_aik_t private_tcg_pts_attr_get_aik_t;
25:
26: /**
27: * Get Attestation Identity Key
28: * see section 3.12 of PTS Protocol: Binding to TNC IF-M Specification
29: *
30: * 1 2 3
31: * 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
32: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
33: * | Reserved |
34: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
35: */
36:
37: #define PTS_GET_AIK_SIZE 4
38: #define PTS_GET_AIK_RESERVED 0x00000000
39:
40: /**
41: * Private data of an tcg_pts_attr_get_aik_t object.
42: */
43: struct private_tcg_pts_attr_get_aik_t {
44:
45: /**
46: * Public members of tcg_pts_attr_get_aik_t
47: */
48: tcg_pts_attr_get_aik_t public;
49:
50: /**
51: * Vendor-specific attribute type
52: */
53: pen_type_t type;
54:
55: /**
56: * Length of attribute value
57: */
58: size_t length;
59:
60: /**
61: * Attribute value or segment
62: */
63: chunk_t value;
64:
65: /**
66: * Noskip flag
67: */
68: bool noskip_flag;
69:
70: /**
71: * Reference count
72: */
73: refcount_t ref;
74: };
75:
76: METHOD(pa_tnc_attr_t, get_type, pen_type_t,
77: private_tcg_pts_attr_get_aik_t *this)
78: {
79: return this->type;
80: }
81:
82: METHOD(pa_tnc_attr_t, get_value, chunk_t,
83: private_tcg_pts_attr_get_aik_t *this)
84: {
85: return this->value;
86: }
87:
88: METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
89: private_tcg_pts_attr_get_aik_t *this)
90: {
91: return this->noskip_flag;
92: }
93:
94: METHOD(pa_tnc_attr_t, set_noskip_flag,void,
95: private_tcg_pts_attr_get_aik_t *this, bool noskip)
96: {
97: this->noskip_flag = noskip;
98: }
99:
100: METHOD(pa_tnc_attr_t, build, void,
101: private_tcg_pts_attr_get_aik_t *this)
102: {
103: bio_writer_t *writer;
104:
105: if (this->value.ptr)
106: {
107: return;
108: }
109: writer = bio_writer_create(PTS_GET_AIK_SIZE);
110: writer->write_uint32 (writer, PTS_GET_AIK_RESERVED);
111:
112: this->value = writer->extract_buf(writer);
113: this->length = this->value.len;
114: writer->destroy(writer);
115: }
116:
117: METHOD(pa_tnc_attr_t, add_segment, void,
118: private_tcg_pts_attr_get_aik_t *this, chunk_t segment)
119: {
120: this->value = chunk_cat("mc", this->value, segment);
121: }
122:
123: METHOD(pa_tnc_attr_t, process, status_t,
124: private_tcg_pts_attr_get_aik_t *this, uint32_t *offset)
125: {
126: bio_reader_t *reader;
127: uint32_t reserved;
128:
129: *offset = 0;
130:
131: if (this->value.len < this->length)
132: {
133: return NEED_MORE;
134: }
135: if (this->value.len < PTS_GET_AIK_SIZE)
136: {
137: DBG1(DBG_TNC, "insufficient data for Get AIK");
138: return FAILED;
139: }
140: reader = bio_reader_create(this->value);
141: reader->read_uint32 (reader, &reserved);
142: reader->destroy(reader);
143:
144: return SUCCESS;
145: }
146:
147: METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
148: private_tcg_pts_attr_get_aik_t *this)
149: {
150: ref_get(&this->ref);
151: return &this->public.pa_tnc_attribute;
152: }
153:
154: METHOD(pa_tnc_attr_t, destroy, void,
155: private_tcg_pts_attr_get_aik_t *this)
156: {
157: if (ref_put(&this->ref))
158: {
159: free(this->value.ptr);
160: free(this);
161: }
162: }
163:
164: /**
165: * Described in header.
166: */
167: pa_tnc_attr_t *tcg_pts_attr_get_aik_create()
168: {
169: private_tcg_pts_attr_get_aik_t *this;
170:
171: INIT(this,
172: .public = {
173: .pa_tnc_attribute = {
174: .get_type = _get_type,
175: .get_value = _get_value,
176: .get_noskip_flag = _get_noskip_flag,
177: .set_noskip_flag = _set_noskip_flag,
178: .build = _build,
179: .process = _process,
180: .add_segment = _add_segment,
181: .get_ref = _get_ref,
182: .destroy = _destroy,
183: },
184: },
185: .type = { PEN_TCG, TCG_PTS_GET_AIK },
186: .ref = 1,
187: );
188:
189: return &this->public.pa_tnc_attribute;
190: }
191:
192:
193: /**
194: * Described in header.
195: */
196: pa_tnc_attr_t *tcg_pts_attr_get_aik_create_from_data(size_t length,
197: chunk_t data)
198: {
199: private_tcg_pts_attr_get_aik_t *this;
200:
201: INIT(this,
202: .public = {
203: .pa_tnc_attribute = {
204: .get_type = _get_type,
205: .get_value = _get_value,
206: .get_noskip_flag = _get_noskip_flag,
207: .set_noskip_flag = _set_noskip_flag,
208: .build = _build,
209: .process = _process,
210: .add_segment = _add_segment,
211: .get_ref = _get_ref,
212: .destroy = _destroy,
213: },
214: },
215: .type = { PEN_TCG, TCG_PTS_GET_AIK },
216: .length = length,
217: .value = chunk_clone(data),
218: .ref = 1,
219: );
220:
221: return &this->public.pa_tnc_attribute;
222: }