1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/********************************************************************************/
/* */
/* IMA Routines */
/* Written by Ken Goldman */
/* IBM Thomas J. Watson Research Center */
/* */
/* (c) Copyright IBM Corporation 2016 - 2019 */
/* */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions are */
/* met: */
/* */
/* Redistributions of source code must retain the above copyright notice, */
/* this list of conditions and the following disclaimer. */
/* */
/* Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in the */
/* documentation and/or other materials provided with the distribution. */
/* */
/* Neither the names of the IBM Corporation nor the names of its */
/* contributors may be used to endorse or promote products derived from */
/* this software without specific prior written permission. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR */
/* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT */
/* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */
/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, */
/* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY */
/* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE */
/* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/********************************************************************************/
#ifndef IMA_H
#define IMA_H
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/param.h>
#include <ibmtss/TPM_Types.h>
/* FIXME meed OS independent value */
/* Debian/Hurd does not define MAXPATHLEN */
#ifndef MAXPATHLEN
#define MAXPATHLEN 4096
#endif
#define IMA_PCR 10
/* IMA currently supports only SHA-1 and SHA-256 */
#define IMA_PCR_BANKS 2
/* FIXME need verification */
#define TCG_EVENT_NAME_LEN_MAX 255
#define TCG_TEMPLATE_DATA_LEN_MAX (sizeof(ImaTemplateData))
/* from security/integrity/integrity.h: */
enum evm_ima_xattr_type {
IMA_XATTR_DIGEST = 0x01,
EVM_XATTR_HMAC,
EVM_IMA_XATTR_DIGSIG,
IMA_XATTR_DIGEST_NG,
IMA_XATTR_LAST
};
/* from include/uapi/linux/hash_info.h: */
enum hash_algo {
HASH_ALGO_MD4,
HASH_ALGO_MD5,
HASH_ALGO_SHA1,
HASH_ALGO_RIPE_MD_160,
HASH_ALGO_SHA256,
HASH_ALGO_SHA384,
HASH_ALGO_SHA512,
HASH_ALGO_SHA224,
HASH_ALGO_RIPE_MD_128,
HASH_ALGO_RIPE_MD_256,
HASH_ALGO_RIPE_MD_320,
HASH_ALGO_WP_256,
HASH_ALGO_WP_384,
HASH_ALGO_WP_512,
HASH_ALGO_TGR_128,
HASH_ALGO_TGR_160,
HASH_ALGO_TGR_192,
HASH_ALGO__LAST
};
/* IMA template names */
#define IMA_UNSUPPORTED 0
#define IMA_FORMAT_IMA_NG 1
#define IMA_FORMAT_IMA_SIG 2
#define IMA_FORMAT_IMA 3
#define IMA_FORMAT_MODSIG 4
#define IMA_FORMAT_BUF 5
//typedef TPM_DIGEST TPM_PCRVALUE; /* The value inside of the PCR */
typedef struct ImaEvent {
uint32_t pcrIndex;
uint8_t digest[SHA1_DIGEST_SIZE]; /* IMA hard coded to SHA-1 */
uint32_t name_len;
char name[TCG_EVENT_NAME_LEN_MAX + 1];
unsigned int nameInt; /* integer for template data handler */
struct ima_template_desc *template_desc; /* template descriptor */
uint32_t template_data_len;
uint8_t *template_data; /* template related data */
} ImaEvent;
typedef struct ImaTemplateDNG {
uint32_t hashLength;
char hashAlg[64+1]; /* FIXME need verification */
TPMI_ALG_HASH hashAlgId;
uint32_t fileDataHashLength;
uint8_t fileDataHash[SHA256_DIGEST_SIZE];
} ImaTemplateDNG;
typedef struct ImaTemplateNNG {
uint32_t fileNameLength;
uint8_t fileName[MAXPATHLEN+1];
} ImaTemplateNNG;
typedef struct ImaTemplateSIG {
uint32_t sigLength;
uint32_t sigHeaderLength;
uint8_t sigHeader[9]; /* FIXME need verification, length and contents */
uint16_t signatureSize;
uint8_t signature[256]; /* FIXME need verification */
} ImaTemplateSIG;
typedef struct ImaTemplateDMODSIG {
uint32_t dModSigHashLength;
char dModSigHashAlg[64+1]; /* FIXME need verification */
TPMI_ALG_HASH dModSigHashAlgId;
uint32_t dModSigFileDataHashLength;
uint8_t dModSigFileDataHash[SHA256_DIGEST_SIZE];
} ImaTemplateDMODSIG;
typedef struct ImaTemplateMODSIG {
uint32_t modSigLength;
uint8_t modSigData[4096]; /* FIXME guess */
} ImaTemplateMODSIG;
typedef struct ImaTemplateBUF {
uint32_t bufLength;
uint8_t bufData[4096]; /* FIXME guess */
} ImaTemplateBUF;
typedef struct ImaTemplateData {
/* d-ng */
ImaTemplateDNG imaTemplateDNG;
/* n-ng */
ImaTemplateNNG imaTemplateNNG;
/* sig */
ImaTemplateSIG imaTemplateSIG;
/* d-modsig */
ImaTemplateDMODSIG imaTemplateDMODSIG;
/* modsig */
ImaTemplateMODSIG imaTemplateMODSIG;
/* buf */
ImaTemplateBUF imaTemplateBUF;
} ImaTemplateData;
#ifdef __cplusplus
extern "C" {
#endif
void IMA_Event_Init(ImaEvent *imaEvent);
void IMA_Event_Free(ImaEvent *imaEvent);
void IMA_Event_Trace(ImaEvent *imaEvent, int traceTemplate);
void IMA_TemplateData_Init(ImaTemplateData *imaTemplateData);
void IMA_TemplateData_Trace(ImaTemplateData *imaTemplateData,
unsigned int nameInt);
uint32_t IMA_Event_ReadFile(ImaEvent *imaEvent,
int *endOfFile,
FILE *infile,
int littleEndian);
uint32_t IMA_Event_ReadBuffer(ImaEvent *imaEvent,
size_t *length,
uint8_t **buffer,
int *endOfBuffer,
int littleEndian,
int getTemplate);
uint32_t IMA_TemplateData_ReadBuffer(ImaTemplateData *imaTemplateData,
ImaEvent *imaEvent,
int littleEndian);
uint32_t IMA_Event_Write(ImaEvent *imaEvent,
FILE *outFile);
uint32_t IMA_Extend(TPMT_HA *imapcr,
ImaEvent *imaEvent,
TPMI_ALG_HASH hashAlg);
uint32_t IMA_VerifyImaDigest(uint32_t *badEvent,
ImaEvent *imaEvent,
int eventNum);
TPM_RC IMA_Event_Marshal(ImaEvent *source,
uint16_t *written, uint8_t **buffer, uint32_t *size);
uint32_t IMA_Event_PcrExtend(TPMT_HA pcrs[IMA_PCR_BANKS][IMPLEMENTATION_PCR],
ImaEvent *imaEvent);
#if 0
uint32_t IMA_Event_ToString(char **eventString,
ImaEvent *imaEvent);
#endif
#ifdef __cplusplus
}
#endif
#endif
|
