1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2 /*
3 * Sample code to test CAP protocol
4 *
5 * This file is provided under a dual BSD/GPLv2 license. When using or
6 * redistributing this file, you may do so under either license.
7 *
8 * GPL LICENSE SUMMARY
9 *
10 * Copyright(c) 2016 Google Inc. All rights reserved.
11 * Copyright(c) 2016 Linaro Ltd. All rights reserved.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of version 2 of the GNU General Public License as
15 * published by the Free Software Foundation.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License version 2 for more details.
21 *
22 * BSD LICENSE
23 *
24 * Copyright(c) 2016 Google Inc. All rights reserved.
25 * Copyright(c) 2016 Linaro Ltd. All rights reserved.
26 *
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
29 * are met:
30 *
31 * * Redistributions of source code must retain the above copyright
32 * notice, this list of conditions and the following disclaimer.
33 * * Redistributions in binary form must reproduce the above copyright
34 * notice, this list of conditions and the following disclaimer in
35 * the documentation and/or other materials provided with the
36 * distribution.
37 * * Neither the name of Google Inc. or Linaro Ltd. nor the names of
38 * its contributors may be used to endorse or promote products
39 * derived from this software without specific prior written
40 * permission.
41 *
42 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
43 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
44 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
45 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE INC. OR
46 * LINARO LTD. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
47 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
48 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
49 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
50 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
51 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
52 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
53 */
54
55 #include <stdio.h>
56 #include <string.h>
57 #include <unistd.h>
58 #include <sys/ioctl.h>
59 #include <sys/stat.h>
60 #include <fcntl.h>
61
62 #include "../../greybus_authentication.h"
63
64 struct cap_ioc_get_endpoint_uid uid;
65 struct cap_ioc_get_ims_certificate cert = {
66 .certificate_class = 0,
67 .certificate_id = 0,
68 };
69
70 struct cap_ioc_authenticate authenticate = {
71 .auth_type = 0,
72 .challenge = {0},
73 };
74
main(int argc,char * argv[])75 int main(int argc, char *argv[])
76 {
77 unsigned int timeout = 10000;
78 char *capdev;
79 int fd, ret;
80
81 /* Make sure arguments are correct */
82 if (argc != 2) {
83 printf("\nUsage: ./firmware <Path of the gb-cap-X dev>\n");
84 return 0;
85 }
86
87 capdev = argv[1];
88
89 printf("Opening %s authentication device\n", capdev);
90
91 fd = open(capdev, O_RDWR);
92 if (fd < 0) {
93 printf("Failed to open: %s\n", capdev);
94 return -1;
95 }
96
97 /* Get UID */
98 printf("Get UID\n");
99
100 ret = ioctl(fd, CAP_IOC_GET_ENDPOINT_UID, &uid);
101 if (ret < 0) {
102 printf("Failed to get UID: %s (%d)\n", capdev, ret);
103 ret = -1;
104 goto close_fd;
105 }
106
107 printf("UID received: 0x%llx\n", *(unsigned long long int *)(uid.uid));
108
109 /* Get certificate */
110 printf("Get IMS certificate\n");
111
112 ret = ioctl(fd, CAP_IOC_GET_IMS_CERTIFICATE, &cert);
113 if (ret < 0) {
114 printf("Failed to get IMS certificate: %s (%d)\n", capdev, ret);
115 ret = -1;
116 goto close_fd;
117 }
118
119 printf("IMS Certificate size: %d\n", cert.cert_size);
120
121 /* Authenticate */
122 printf("Authenticate module\n");
123
124 memcpy(authenticate.uid, uid.uid, 8);
125
126 ret = ioctl(fd, CAP_IOC_AUTHENTICATE, &authenticate);
127 if (ret < 0) {
128 printf("Failed to authenticate module: %s (%d)\n", capdev, ret);
129 ret = -1;
130 goto close_fd;
131 }
132
133 printf("Authenticated, result (%02x), sig-size (%02x)\n",
134 authenticate.result_code, authenticate.signature_size);
135
136 close_fd:
137 close(fd);
138
139 return ret;
140 }
141
