1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2 /*
3  * Sample code to test CAP protocol
4  *
5  * Copyright(c) 2016 Google Inc. All rights reserved.
6  * Copyright(c) 2016 Linaro Ltd. All rights reserved.
7  */
8 
9 #include <stdio.h>
10 #include <string.h>
11 #include <unistd.h>
12 #include <sys/ioctl.h>
13 #include <sys/stat.h>
14 #include <fcntl.h>
15 
16 #include "../../greybus_authentication.h"
17 
18 struct cap_ioc_get_endpoint_uid uid;
19 struct cap_ioc_get_ims_certificate cert = {
20 	.certificate_class = 0,
21 	.certificate_id = 0,
22 };
23 
24 struct cap_ioc_authenticate authenticate = {
25 	.auth_type = 0,
26 	.challenge = {0},
27 };
28 
29 int main(int argc, char *argv[])
30 {
31 	unsigned int timeout = 10000;
32 	char *capdev;
33 	int fd, ret;
34 
35 	/* Make sure arguments are correct */
36 	if (argc != 2) {
37 		printf("\nUsage: ./firmware <Path of the gb-cap-X dev>\n");
38 		return 0;
39 	}
40 
41 	capdev = argv[1];
42 
43 	printf("Opening %s authentication device\n", capdev);
44 
45 	fd = open(capdev, O_RDWR);
46 	if (fd < 0) {
47 		printf("Failed to open: %s\n", capdev);
48 		return -1;
49 	}
50 
51 	/* Get UID */
52 	printf("Get UID\n");
53 
54 	ret = ioctl(fd, CAP_IOC_GET_ENDPOINT_UID, &uid);
55 	if (ret < 0) {
56 		printf("Failed to get UID: %s (%d)\n", capdev, ret);
57 		ret = -1;
58 		goto close_fd;
59 	}
60 
61 	printf("UID received: 0x%llx\n", *(unsigned long long int *)(uid.uid));
62 
63 	/* Get certificate */
64 	printf("Get IMS certificate\n");
65 
66 	ret = ioctl(fd, CAP_IOC_GET_IMS_CERTIFICATE, &cert);
67 	if (ret < 0) {
68 		printf("Failed to get IMS certificate: %s (%d)\n", capdev, ret);
69 		ret = -1;
70 		goto close_fd;
71 	}
72 
73 	printf("IMS Certificate size: %d\n", cert.cert_size);
74 
75 	/* Authenticate */
76 	printf("Authenticate module\n");
77 
78 	memcpy(authenticate.uid, uid.uid, 8);
79 
80 	ret = ioctl(fd, CAP_IOC_AUTHENTICATE, &authenticate);
81 	if (ret < 0) {
82 		printf("Failed to authenticate module: %s (%d)\n", capdev, ret);
83 		ret = -1;
84 		goto close_fd;
85 	}
86 
87 	printf("Authenticated, result (%02x), sig-size (%02x)\n",
88 		authenticate.result_code, authenticate.signature_size);
89 
90 close_fd:
91 	close(fd);
92 
93 	return ret;
94 }
95