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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_tpm_version_info.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_tpm_version_info_t
25: private_tcg_pts_attr_get_tpm_version_info_t;
26:
27: /**
28: * Get TPM Version Information
29: * see section 3.10 of PTS Protocol: Binding to TNC IF-M Specification
30: *
31: * 1 2 3
32: * 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
33: *
34: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
35: * | Reserved |
36: * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
37: *
38: */
39:
40: #define PTS_GET_TPM_VER_INFO_SIZE 4
41: #define PTS_GET_TPM_VER_INFO_RESERVED 0x00
42:
43: /**
44: * Private data of an tcg_pts_attr_get_tpm_version_info_t object.
45: */
46: struct private_tcg_pts_attr_get_tpm_version_info_t {
47:
48: /**
49: * Public members of tcg_pts_attr_get_tpm_version_info_t
50: */
51: tcg_pts_attr_get_tpm_version_info_t public;
52:
53: /**
54: * Vendor-specific attribute type
55: */
56: pen_type_t type;
57:
58: /**
59: * Length of attribute value
60: */
61: size_t length;
62:
63: /**
64: * Attribute value or segment
65: */
66: chunk_t value;
67:
68: /**
69: * Noskip flag
70: */
71: bool noskip_flag;
72:
73: /**
74: * Reference count
75: */
76: refcount_t ref;
77: };
78:
79: METHOD(pa_tnc_attr_t, get_type, pen_type_t,
80: private_tcg_pts_attr_get_tpm_version_info_t *this)
81: {
82: return this->type;
83: }
84:
85: METHOD(pa_tnc_attr_t, get_value, chunk_t,
86: private_tcg_pts_attr_get_tpm_version_info_t *this)
87: {
88: return this->value;
89: }
90:
91: METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
92: private_tcg_pts_attr_get_tpm_version_info_t *this)
93: {
94: return this->noskip_flag;
95: }
96:
97: METHOD(pa_tnc_attr_t, set_noskip_flag,void,
98: private_tcg_pts_attr_get_tpm_version_info_t *this, bool noskip)
99: {
100: this->noskip_flag = noskip;
101: }
102:
103: METHOD(pa_tnc_attr_t, build, void,
104: private_tcg_pts_attr_get_tpm_version_info_t *this)
105: {
106: bio_writer_t *writer;
107:
108: if (this->value.ptr)
109: {
110: return;
111: }
112: writer = bio_writer_create(PTS_GET_TPM_VER_INFO_SIZE);
113: writer->write_uint32 (writer, PTS_GET_TPM_VER_INFO_RESERVED);
114:
115: this->value = writer->extract_buf(writer);
116: this->length = this->value.len;
117: writer->destroy(writer);
118: }
119:
120: METHOD(pa_tnc_attr_t, process, status_t,
121: private_tcg_pts_attr_get_tpm_version_info_t *this, uint32_t *offset)
122: {
123: bio_reader_t *reader;
124: uint32_t reserved;
125:
126: *offset = 0;
127:
128: if (this->value.len < this->length)
129: {
130: return NEED_MORE;
131: }
132: if (this->value.len < PTS_GET_TPM_VER_INFO_SIZE)
133: {
134: DBG1(DBG_TNC, "insufficient data for Get TPM Version Information");
135: return FAILED;
136: }
137: reader = bio_reader_create(this->value);
138: reader->read_uint32 (reader, &reserved);
139: reader->destroy(reader);
140:
141: return SUCCESS;
142: }
143:
144: METHOD(pa_tnc_attr_t, add_segment, void,
145: private_tcg_pts_attr_get_tpm_version_info_t *this, chunk_t segment)
146: {
147: this->value = chunk_cat("mc", this->value, segment);
148: }
149:
150: METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
151: private_tcg_pts_attr_get_tpm_version_info_t *this)
152: {
153: ref_get(&this->ref);
154: return &this->public.pa_tnc_attribute;
155: }
156:
157: METHOD(pa_tnc_attr_t, destroy, void,
158: private_tcg_pts_attr_get_tpm_version_info_t *this)
159: {
160: if (ref_put(&this->ref))
161: {
162: free(this->value.ptr);
163: free(this);
164: }
165: }
166:
167: /**
168: * Described in header.
169: */
170: pa_tnc_attr_t *tcg_pts_attr_get_tpm_version_info_create()
171: {
172: private_tcg_pts_attr_get_tpm_version_info_t *this;
173:
174: INIT(this,
175: .public = {
176: .pa_tnc_attribute = {
177: .get_type = _get_type,
178: .get_value = _get_value,
179: .get_noskip_flag = _get_noskip_flag,
180: .set_noskip_flag = _set_noskip_flag,
181: .build = _build,
182: .process = _process,
183: .add_segment = _add_segment,
184: .get_ref = _get_ref,
185: .destroy = _destroy,
186: },
187: },
188: .type = { PEN_TCG, TCG_PTS_GET_TPM_VERSION_INFO },
189: .ref = 1,
190: );
191:
192: return &this->public.pa_tnc_attribute;
193: }
194:
195:
196: /**
197: * Described in header.
198: */
199: pa_tnc_attr_t *tcg_pts_attr_get_tpm_version_info_create_from_data(size_t length,
200: chunk_t data)
201: {
202: private_tcg_pts_attr_get_tpm_version_info_t *this;
203:
204: INIT(this,
205: .public = {
206: .pa_tnc_attribute = {
207: .get_type = _get_type,
208: .get_value = _get_value,
209: .get_noskip_flag = _get_noskip_flag,
210: .set_noskip_flag = _set_noskip_flag,
211: .build = _build,
212: .process = _process,
213: .add_segment = _add_segment,
214: .get_ref = _get_ref,
215: .destroy = _destroy,
216: },
217: },
218: .type = { PEN_TCG, TCG_PTS_GET_TPM_VERSION_INFO },
219: .length = length,
220: .value = chunk_clone(data),
221: .ref = 1,
222: );
223:
224: return &this->public.pa_tnc_attribute;
225: }