Gitweb: http://git.kernel.org/linus/c5b1e545a567c52081239bd5d187669640d0146f
Commit: c5b1e545a567c52081239bd5d187669640d0146f
Parent: 563f346d04e8373739240604a51ce8529dd9f07e
Author: Neil Horman <nhorman@tuxdriver.com>
AuthorDate: Thu Feb 5 16:01:38 2009 +1100
Committer: Herbert Xu <herbert@gondor.apana.org.au>
CommitDate: Wed Feb 18 16:48:07 2009 +0800
crypto: ansi_cprng - Panic on CPRNG test failure when in FIPS mode
FIPS 140-2 specifies that all access to various cryptographic modules be
prevented in the event that any of the provided self tests fail on the various
implemented algorithms. We already panic when any of the test in testmgr.c
fail when we are operating in fips mode. The continuous test in the cprng here
was missed when that was implmented. This code simply checks for the
fips_enabled flag if the test fails, and warns us via syslog or panics the box
accordingly.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
crypto/ansi_cprng.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/crypto/ansi_cprng.c b/crypto/ansi_cprng.c
index 7447806..d80ed4c 100644
--- a/crypto/ansi_cprng.c
+++ b/crypto/ansi_cprng.c
@@ -132,9 +132,15 @@ static int _get_more_prng_bytes(struct prng_context *ctx)
*/
if (!memcmp(ctx->rand_data, ctx->last_rand_data,
DEFAULT_BLK_SZ)) {
+ if (fips_enabled) {
+ panic("cprng %p Failed repetition check!\n",
+ ctx);
+ }
+
printk(KERN_ERR
"ctx %p Failed repetition check!\n",
ctx);
+
ctx->flags |= PRNG_NEED_RESET;
return -EINVAL;
}
--
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