1 #include <zephyr/kernel.h>
2 #include <zephyr/device.h>
3 #include <zephyr/drivers/entropy.h>
4 #include <mbedtls/entropy.h>
5 #include <entropy_poll.h>
6
mbedtls_hardware_poll(void * data,unsigned char * output,size_t len,size_t * olen)7 int mbedtls_hardware_poll(void *data, unsigned char *output, size_t len,
8 size_t *olen)
9 {
10 // const struct device *dev;
11 // size_t chunk_size;
12
13 (void)data;
14
15 if (output == NULL) {
16 return -1;
17 }
18
19 if (olen == NULL) {
20 return -1;
21 }
22
23 if (len == 0) {
24 return -1;
25 }
26
27 // dev = device_get_binding(DT_CHOSEN_ZEPHYR_ENTROPY_LABEL);
28
29 // if (!dev) {
30 // return MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED;
31 // }
32
33 // while (len > 0) {
34 // chunk_size = MIN(MBEDTLS_ENTROPY_MAX_GATHER, len);
35
36 // if (entropy_get_entropy(dev, output, chunk_size) < 0) {
37 // return MBEDTLS_ERR_ENTROPY_SOURCE_FAILED;
38 // }
39
40 // *olen += chunk_size;
41 // output += chunk_size;
42 // len -= chunk_size;
43 // }
44
45 /*We don't get real random numbers*/
46 for (size_t i = 0; i < len; i++) {
47 output[i] = i;
48 }
49
50 *olen = len;
51
52 return 0;
53 }
54
55 #if defined(unix) || defined(__linux__) || defined(__unix__) || \
56 defined(__unix) | (defined(__APPLE__) && defined(__MACH__)) || \
57 defined(uECC_POSIX)
58 /*use the entropy source as provided in /tinycrypt/lib/source/ecc_platform_specific.c*/
59 #else
default_CSPRNG(uint8_t * dest,unsigned int size)60 int default_CSPRNG(uint8_t *dest, unsigned int size)
61 {
62 return 1;
63 }
64 #endif
