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 */ 12 TEE_Result __weak crypto_rng_init(const void *data __unused, 13 size_t dlen __unused) 14 { 15 return TEE_SUCCESS; 16 } 17 18 /* This is a HW RNG, no need to add entropy */ 19 void __weak crypto_rng_add_event(enum crypto_rng_src sid __unused, 20 unsigned int *pnum __unused, 21 const void *data __unused, 22 size_t dlen __unused) 23 { 24 } 25 26 TEE_Result __weak crypto_rng_read(void *buf, size_t blen) 27 { 28 if (!buf) 29 return TEE_ERROR_BAD_PARAMETERS; 30 31 return hw_get_random_bytes(buf, blen); 32 } 33