root/drivers/staging/greybus/Documentation/firmware/authenticate.c

DEFINITIONS

1. main

   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 }