1 // SPDX-License-Identifier: BSD-2-Clause
2 /* Copyright (c) 2018, Linaro Limited */
3
4 #include <compiler.h>
5 #include <crypto/crypto.h>
6 #include <kernel/panic.h>
7 #include <rng_support.h>
8 #include <tee/tee_cryp_utl.h>
9 #include <types_ext.h>
10
11 /* This is a HW RNG, no need for seeding */
crypto_rng_init(const void * data __unused,size_t dlen __unused)12 TEE_Result crypto_rng_init(const void *data __unused, size_t dlen __unused)
13 {
14 return TEE_SUCCESS;
15 }
16
17 /* This is a HW RNG, no need to add entropy */
crypto_rng_add_event(enum crypto_rng_src sid __unused,unsigned int * pnum __unused,const void * data __unused,size_t dlen __unused)18 void crypto_rng_add_event(enum crypto_rng_src sid __unused,
19 unsigned int *pnum __unused,
20 const void *data __unused,
21 size_t dlen __unused)
22 {
23 }
24
crypto_rng_read(void * buf,size_t blen)25 TEE_Result crypto_rng_read(void *buf, size_t blen)
26 {
27 if (!buf)
28 return TEE_ERROR_BAD_PARAMETERS;
29
30 return hw_get_random_bytes(buf, blen);
31 }
32