From 18792314d7b8dde596a9c378b2d47516cbd871f4 Mon Sep 17 00:00:00 2001 From: Robbie Zhang Date: Mon, 13 Feb 2017 13:44:14 -0800 Subject: arch/x86: add functions to generate random numbers Using x86 RDRAND instruction, two functions are supplied to generate a 32bit or 64bit number. One potential usage is the sealing key generation for SGX. BUG=chrome-os-partner:62438 BRANCH=NONE TEST=Tested on Eve to generate a 64bit random number. Change-Id: I50cbeda4de17ccf2fc5efc1fe04f6b1a31ec268c Signed-off-by: Robbie Zhang Reviewed-on: https://review.coreboot.org/18362 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/include/random.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 src/include/random.h (limited to 'src/include') diff --git a/src/include/random.h b/src/include/random.h new file mode 100644 index 0000000000..cdb44151e0 --- /dev/null +++ b/src/include/random.h @@ -0,0 +1,27 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2017 Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#ifndef _RANDOM_H_ +#define _RANDOM_H_ + +#include + +/* + * Generates a 32/64 bit random number respectively. + * return 0 on success and -1 on error. + */ +int get_random_number_32(uint32_t *rand); +int get_random_number_64(uint64_t *rand); + +#endif /* _RANDOM_H_ */ -- cgit v1.2.3