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
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/*
* Licensed Materials - Property of IBM
*
* trousers - An open source TCG Software Stack
*
* (C) Copyright International Business Machines Corp. 2006
*
*/
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "daa_structs.h"
#include "trousers/tss.h"
#include "trousers/trousers.h"
#include "spi_internal_types.h"
#include "spi_utils.h"
#include "obj.h"
#include "tsplog.h"
#include "daa_parameter.h"
#include "verifier.h"
#include "platform.h"
// for RSA Key
#include <openssl/rsa.h>
#define DEFAULT_CREDENTIAL_FILENAME "credential.txt"
#define DEFAULT_OWN_PASSWD "OWN_PWD"
int print_usage(char *exec) {
fprintf(stderr, "usage: %s\n", exec);
fprintf(stderr,
"\t-m,\t--message\n\t\tif define, the data is signed using this message\n\
\t\totherwise an AIK will be generated and used\n");
fprintf(stderr,
"\t-pw,\t--passwd\n\t\ttpm owner password (default: %s)\n",
DEFAULT_OWN_PASSWD);
fprintf(stderr,
"\t-cr,\t--credential\n\t\tcredential filename (default: %s)\n",
DEFAULT_CREDENTIAL_FILENAME);
return -1;
}
int main(int argc, char *argv[]) {
TSS_HCONTEXT hContext;
TSS_RESULT result;
TSS_HTPM hTPM;
TSS_HPOLICY hPolicy;
char *credential_filename = DEFAULT_CREDENTIAL_FILENAME;
UINT32 nonceVerifierLength;
BYTE *nonceVerifier;
TSS_HDAA hDAA;
TSS_DAA_CREDENTIAL *hDaaCredential;
TSS_DAA_SIGN_DATA signData;
TSS_DAA_SIGNATURE daaSignature;
TSS_DAA_SELECTED_ATTRIB revealAttributes;
char *szTpmPasswd = DEFAULT_OWN_PASSWD;
char *message = NULL;
BYTE **attributes = NULL;
FILE *file;
char *param;
int i, length, rv;
bi_ptr random = NULL;
TSS_BOOL isCorrect;
EVP_MD_CTX mdctx;
TSS_HKEY hKEY;
init_tss_version( &signData);
init_tss_version( &daaSignature);
init_tss_version( &revealAttributes);
i = 1;
while( i < argc) {
param = argv[ i];
if ( strcmp( param, "-m") == 0 || strcmp( param, "--message") == 0) {
i++;
if( i == argc) return print_usage( argv[0]);
message = argv[i];
} else if( strcmp( param, "-cr") == 0 || strcmp( param, "--credential") == 0){
i++;
if( i == argc) return print_usage( argv[0]);
credential_filename = argv[i];
} else if( strcmp( param, "-pw") == 0 || strcmp( param, "--passwd") == 0){
i++;
if( i == argc) return print_usage( argv[0]);
szTpmPasswd = argv[i];
} else {
fprintf(stderr, "%s:unrecognized option `%s'\n", argv[0], param);
return print_usage( argv[0]);
}
i++;
}
bi_init( NULL);
printf("Loading credential: %s ", credential_filename);
file = fopen( credential_filename, "r");
if( (hDaaCredential = load_TSS_DAA_CREDENTIAL( file)) == 0) {
LogError( "[test_join]: Error when loading \'%s\': %s\n",
credential_filename,
strerror( errno));
result = TSS_E_FAIL;
goto out_close;
}
fclose( file);
printf("Done\n");
// Create Context
LogDebug("Create Context");
result = Tspi_Context_Create( &hContext );
if ( result != TSS_SUCCESS )
{
LogError( "Tspi_Context_Create %d\n", result );
goto out;
}
// Connect to Context
result = Tspi_Context_Connect( hContext, NULL );
if ( result != TSS_SUCCESS) goto out_close;
printf("\nConnect to the context: %X\n", hContext);
if( (result = Tspi_Context_GetTpmObject( hContext, &hTPM)) != TSS_SUCCESS)
goto out_close;
// Get the correct policy using the TPM ownership PASSWD
if( (result = Tspi_GetPolicyObject( hTPM, TSS_POLICY_USAGE, &hPolicy)) != TSS_SUCCESS)
goto out_close;
if( (result = Tspi_Policy_SetSecret( hPolicy,
TSS_SECRET_MODE_PLAIN,
strlen( szTpmPasswd),
szTpmPasswd)) != TSS_SUCCESS)
goto out_close;
LogDebug("Tspi_Policy_SetSecret hPolicy received;%d", hPolicy);
//Create Object
result = obj_daa_add( hContext, &hDAA);
if (result != TSS_SUCCESS) {
LogError("Tspi_Context_CreateObject:%d", result);
Tspi_Context_Close(hContext);
LogError("%s: %s", argv[0], err_string(result));
exit(result);
}
LogDebug("created DAA object:%X", hDAA);
// TODO: verifier base name ??
result = Tspi_DAA_VerifyInit(
hDAA, // in
&nonceVerifierLength, // out
&nonceVerifier, // out
0, //baseNameLength, // out
NULL //baseName // out
);
if (result != TSS_SUCCESS) goto out_close;
LogDebug("Verify Init return nonceVerifier [%s]",
dump_byte_array( nonceVerifierLength, nonceVerifier));
create_TSS_DAA_SELECTED_ATTRIB( &revealAttributes, 5, 0, 1, 1, 0, 0);
// create the TSS_DAA_SIGN_DATA struct
// .selector: 0 -> payload contains a handle to an AIK
// 1 -> payload contains a hashed message
if( message != NULL) {
signData.selector = TSS_FLAG_DAA_SIGN_MESSAGE_HASH;
signData.payloadFlag = TSS_FLAG_DAA_SIGN_MESSAGE_HASH;
EVP_DigestInit(&mdctx, DAA_PARAM_get_message_digest());
EVP_DigestUpdate(&mdctx, (BYTE *)message, strlen( message));
signData.payloadLength = EVP_MD_CTX_size(&mdctx);
signData.payload = (BYTE *)malloc( EVP_MD_CTX_size(&mdctx));
EVP_DigestFinal(&mdctx, signData.payload, NULL);
} else {
signData.selector = TSS_FLAG_DAA_SIGN_IDENTITY_KEY;
result = Tspi_Context_CreateObject(
hContext, // in
TSS_OBJECT_TYPE_RSAKEY, // in
TSS_KEY_SIZE_2048, // in
&hKEY // out
);
if( result != TSS_SUCCESS) goto out_close;
}
result = Tspi_TPM_DAA_Sign(
hDAA, // in
hTPM, // in
(TSS_HKEY)hDaaCredential, // in
revealAttributes, // in
0, // verifierBaseNameLength, // in
NULL, // verifierBaseName, // in
nonceVerifierLength, // in
nonceVerifier, // in
signData, // in
&daaSignature // out
);
if (result != TSS_SUCCESS) goto out_close;
LogDebug("TPM_DAA_Sign return daaSignature [%s]",
dump_byte_array( nonceVerifierLength, nonceVerifier));
// generate attributes list but without copying the not revealed ones
attributes = malloc( sizeof(BYTE *) * hDaaCredential->attributesLength);
for( i=0; i < (int)(hDaaCredential->attributesLength); i++) {
if( revealAttributes.indicesList[i]) {
attributes[i] = (BYTE *)malloc( DAA_PARAM_SIZE_F_I / 8);
memcpy( attributes[i],
hDaaCredential->attributes[i],
DAA_PARAM_SIZE_F_I / 8);
} else {
attributes[i] = NULL;
}
}
result = Tspi_DAA_VerifySignature(
hDAA, // in
daaSignature, // in
(TSS_HKEY)&(hDaaCredential->issuerPK), // in
signData, // in
hDaaCredential->attributesLength, // in
attributes, // in
nonceVerifierLength, // in
nonceVerifier, // in
0, //baseNameLength, //in
NULL, // in
&isCorrect // out
);
printf("Signature correct:%s\n", ( isCorrect ? "yes" : "no"));
out_close:
if( attributes != NULL) {
for( i=0; i<(int)hDaaCredential->attributesLength; i++) {
if( attributes[i] != NULL) free( attributes[i]);
}
free( attributes);
}
if( random != NULL) bi_free_ptr( random);
Tspi_Context_FreeMemory( hContext, NULL );
Tspi_Context_Close( hContext );
out:
bi_release();
LogDebug("THE END result=%d:%s",result, err_string( result) );;
return result;
}
|
