1 /*
2 * Copyright (c) 2025, SECO Mind Srl
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/kernel.h>
8 #include <zephyr/sys/uuid.h>
9
10 #include <zephyr/logging/log.h>
11 LOG_MODULE_REGISTER(uuid_sample, LOG_LEVEL_INF);
12
main(void)13 int main(void)
14 {
15 int result;
16 struct uuid uuid_v4 = {0};
17 struct uuid uuid_v5_namespace = {0};
18 struct uuid uuid_v5 = {0};
19 char uuid_v4_str[UUID_STR_LEN] = {0};
20 char uuid_v5_str[UUID_STR_LEN] = {0};
21 char uuid_v4_base64[UUID_BASE64_LEN] = {0};
22 char uuid_v4_base64url[UUID_BASE64URL_LEN] = {0};
23
24 /* Generate an UUID v4 from pseudo-random data */
25 result = uuid_generate_v4(&uuid_v4);
26 if (result != 0) {
27 LOG_ERR("UUID v4 generation failed, error: %s (%d)", strerror(result), result);
28 return -1;
29 }
30 /* Convert the UUID to string and to its base 64 and base 64 URL safe formats */
31 result = uuid_to_string(&uuid_v4, uuid_v4_str);
32 if (result != 0) {
33 LOG_ERR("UUID v4 to string failed, error: %s (%d)", strerror(result), result);
34 return -1;
35 }
36 LOG_INF("UUID v4: '%s'", uuid_v4_str);
37 result = uuid_to_base64(&uuid_v4, uuid_v4_base64);
38 if (result != 0) {
39 LOG_ERR("UUID v4 to base 64 failed, error: %s (%d)", strerror(result), result);
40 return -1;
41 }
42 LOG_INF("UUID v4 base 64: '%s'", uuid_v4_base64);
43 result = uuid_to_base64url(&uuid_v4, uuid_v4_base64url);
44 if (result != 0) {
45 LOG_ERR("UUID v4 to base 64 URL safe failed, error: %s (%d)", strerror(result),
46 result);
47 return -1;
48 }
49 LOG_INF("UUID v4 base 64 URL safe: '%s'", uuid_v4_base64url);
50
51 /* Generate an UUID v5 */
52 /* This UUID is the same as in RFC 9562 Appendix A.4: "Example of a UUIDv5 Value" */
53 result = uuid_from_string("6ba7b810-9dad-11d1-80b4-00c04fd430c8", &uuid_v5_namespace);
54 if (result != 0) {
55 LOG_ERR("Namespace string to UUID failed, error: %s (%d)", strerror(result),
56 result);
57 return -1;
58 }
59 result = uuid_generate_v5(&uuid_v5_namespace, "www.example.com", strlen("www.example.com"),
60 &uuid_v5);
61 if (result != 0) {
62 LOG_ERR("UUID v5 generation failed, error: %s (%d)", strerror(result), result);
63 return -1;
64 }
65 result = uuid_to_string(&uuid_v5, uuid_v5_str);
66 if (result != 0) {
67 LOG_ERR("UUID v4 to string failed, error: %s (%d)", strerror(result), result);
68 return -1;
69 }
70 LOG_INF("UUID v5: '%s'", uuid_v5_str);
71
72 LOG_INF("UUID sample completed successfully");
73
74 return 0;
75 }
76