Am 17.03.2017 um 13:30 schrieb Sascha Hauer:
> On Thu, Mar 16, 2017 at 06:31:45AM +0100, Oleksij Rempel wrote:
>> From: Steffen Trumtrar <s.trumtrar@xxxxxxxxxxxxxx>
>>
>> Instead of generating pseudo random numbers, get random bytes
>> from an optional HW generator, if enabled and registered.
>>
>> Signed-off-by: Steffen Trumtrar <s.trumtrar@xxxxxxxxxxxxxx>
>> Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
>> ---
>> lib/random.c | 19 +++++++++++++++++++
>> 1 file changed, 19 insertions(+)
>>
>> diff --git a/lib/random.c b/lib/random.c
>> index 210fea994..42c0f83b7 100644
>> --- a/lib/random.c
>> +++ b/lib/random.c
>> @@ -1,5 +1,6 @@
>> #include <common.h>
>> #include <stdlib.h>
>> +#include <linux/hw_random.h>
>>
>> static unsigned int random_seed;
>>
>> @@ -22,6 +23,24 @@ void get_random_bytes(void *_buf, int len)
>> {
>> char *buf = _buf;
>>
>> + if (IS_ENABLED(CONFIG_HWRNG)) {
>> + struct hwrng *rng;
>> + int bytes;
>> +
>> + rng = hwrng_get_first();
>> + if (!IS_ERR(rng)) {
>> + while (len) {
>> + bytes = hwrng_get_data(rng, _buf, len, 1);
>> + if (!bytes)
>> + goto sw_fallback;
>
> hwrng_get_data() looks like it could return a negative error code.
hm.. good point.
--
Regards,
Oleksij
Attachment:
signature.asc
Description: OpenPGP digital signature
_______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
