From 361d18a20836b790e6ffebaf8f7223f686811290 Mon Sep 17 00:00:00 2001
From: "Dr. Stephen Henson" <steve@openssl.org>
Date: Mon, 12 Sep 2011 18:45:05 +0000
Subject: [PATCH] Check length of additional input in DRBG generate function.

---
 fips/rand/fips_drbg_lib.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fips/rand/fips_drbg_lib.c b/fips/rand/fips_drbg_lib.c
index 98bd10bce3..015b95a972 100644
--- a/fips/rand/fips_drbg_lib.c
+++ b/fips/rand/fips_drbg_lib.c
@@ -377,6 +377,12 @@ int FIPS_drbg_generate(DRBG_CTX *dctx, unsigned char *out, size_t outlen,
 		return 0;
 		}
 
+	if (adinlen > dctx->max_adin)
+		{
+		r = FIPS_R_ADDITIONAL_INPUT_TOO_LONG;
+		goto end;
+		}
+
 	if (dctx->flags & DRBG_CUSTOM_RESEED)
 		dctx->generate(dctx, NULL, outlen, NULL, 0);
 	else if (dctx->reseed_counter >= dctx->reseed_interval)
-- 
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