1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Damien P. George
*
* use of the TRNG by
* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
* Copyright (c) 2019 Artur Pacholec
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/runtime.h"
#include "py/mphal.h"
#if defined(MIMXRT117x_SERIES)
#include "fsl_caam.h"
#else
#include "fsl_trng.h"
#endif
static bool initialized = false;
#if defined(MIMXRT117x_SERIES)
STATIC caam_handle_t caam_handle;
STATIC caam_rng_state_handle_t caam_state_handle = kCAAM_RngStateHandle0;
#if defined(FSL_FEATURE_HAS_L1CACHE) || defined(__DCACHE_PRESENT)
AT_NONCACHEABLE_SECTION(static caam_job_ring_interface_t s_jrif0);
#else
static caam_job_ring_interface_t s_jrif0;
#endif
STATIC void trng_start(void) {
caam_config_t config;
if (!initialized) {
CAAM_GetDefaultConfig(&config);
config.jobRingInterface[0] = &s_jrif0;
CAAM_Init(CAAM, &config);
initialized = true;
}
}
void trng_random_data(unsigned char *output, size_t len) {
trng_start();
CAAM_RNG_GetRandomData(CAAM, &caam_handle, caam_state_handle, output, len,
kCAAM_RngDataAny, NULL);
}
#else
STATIC void trng_start(void) {
trng_config_t trngConfig;
if (!initialized) {
TRNG_GetDefaultConfig(&trngConfig);
trngConfig.sampleMode = kTRNG_SampleModeVonNeumann;
TRNG_Init(TRNG, &trngConfig);
initialized = true;
}
}
void trng_random_data(unsigned char *output, size_t len) {
trng_start();
TRNG_GetRandomData(TRNG, output, len);
}
#endif
uint32_t trng_random_u32(void) {
uint32_t rngval;
trng_start();
trng_random_data((uint8_t *)&rngval, 4);
return rngval;
}
#if MICROPY_PY_UOS_URANDOM
STATIC mp_obj_t mp_os_urandom(mp_obj_t num) {
mp_int_t n = mp_obj_get_int(num);
vstr_t vstr;
vstr_init_len(&vstr, n);
trng_start();
trng_random_data((uint8_t *)vstr.buf, n);
return mp_obj_new_bytes_from_vstr(&vstr);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_os_urandom_obj, mp_os_urandom);
#endif
#if MICROPY_PY_UOS_DUPTERM_NOTIFY
STATIC mp_obj_t mp_os_dupterm_notify(mp_obj_t obj_in) {
(void)obj_in;
for (;;) {
int c = mp_os_dupterm_rx_chr();
if (c < 0) {
break;
}
ringbuf_put(&stdin_ringbuf, c);
}
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_os_dupterm_notify_obj, mp_os_dupterm_notify);
#endif
|
