| From: |
| Andy Lutomirski <luto@amacapital.net> |
| To: |
| Theodore Ts'o <tytso@mit.edu>, Greg Price <price@MIT.EDU> |
| Subject: |
| [PATCH resend 0/2] random: Use DRBG sources |
| Date: |
| Mon, 14 Apr 2014 08:49:58 -0700 |
| Message-ID: |
| <cover.1397487345.git.luto@amacapital.net> |
| Cc: |
| Matt Mackall <mpm@selenic.com>, Herbert Xu <herbert@gondor.apana.org.au>, tpmdd-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Andy Lutomirski <luto@amacapital.net> |
| Archive‑link: | |
Article |
[Resent because I forgot to email lkml. This also surreptitiously
fixes a silly typo on a patch description.]
This is my attempt to come up with a workable way to use so-called
entropy sources like a TPM to feed /dev/urandom.
Arguably we should be feeding the input pool as well, but if the
/dev/random algorithm is correct, this shouldn't matter. I don't want
sensible use of TPMs for /dev/urandom to block on a long debate about
/dev/random, so these patches have no effect on /dev/random.
Andy Lutomirski (2):
random: Add add_drbg_randomness to safely seed urandom from crypto hw
tpm,random: Call add_drbg_randomness after selftest
drivers/char/random.c | 56 +++++++++++++++++++++++++++++++++++-----
drivers/char/tpm/tpm-interface.c | 15 ++++++++++-
include/linux/random.h | 1 +
include/trace/events/random.h | 19 ++++++++++++++
4 files changed, 83 insertions(+), 8 deletions(-)
--
1.9.0
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