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 <[email protected]> Signed-off-by: Herbert Xu <[email protected]>
rtvt123 · Feb 18, 2009 · c5b1e54 · c5b1e54
1 parent 563f346
commit c5b1e54
Showing 1 changed file with 6 additions and 0 deletions.
diff --git 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;
 			}