diff options
| author | Robbie Zhang <robbie.zhang@intel.com> | 2017-02-13 13:44:14 -0800 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2017-02-20 04:46:10 +0100 |
| commit | 18792314d7b8dde596a9c378b2d47516cbd871f4 (patch) | |
| tree | 6fd011d1f959d84f1253268db2d192cf55190f65 /src/include | |
| parent | f296ce91b90ba845b1ff5ca35e98e52e884694cf (diff) | |
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 <robbie.zhang@intel.com>
Reviewed-on: https://review.coreboot.org/18362
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/random.h | 27 |
1 files changed, 27 insertions, 0 deletions
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 <stdint.h> + +/* + * 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_ */ |