From: Andreas Steffen <andreas.steffen@strongswan.org>
Date: Fri, 6 Dec 2013 23:21:28 +0000 (+0100)
Subject: Streamlined DRBG and MGF1 debug output
X-Git-Tag: 5.1.2dr3~23
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a978a8194deba47087c06c2d13ff93e25a3e84ec;p=thirdparty%2Fstrongswan.git

Streamlined DRBG and MGF1 debug output
---

diff --git a/src/libstrongswan/plugins/ntru/ntru_crypto/ntru_crypto_ntru_mgftp1.c b/src/libstrongswan/plugins/ntru/ntru_crypto/ntru_crypto_ntru_mgftp1.c
index d0427982bc..1d3362625f 100644
--- a/src/libstrongswan/plugins/ntru/ntru_crypto/ntru_crypto_ntru_mgftp1.c
+++ b/src/libstrongswan/plugins/ntru/ntru_crypto/ntru_crypto_ntru_mgftp1.c
@@ -71,6 +71,7 @@ ntru_mgftp1(
 	ntru_mgf1_t *mgf1;
 
 	/* generate minimum MGF1 output */
+	DBG2(DBG_LIB, "MGF1 is seeded with %u octets", seed_len);
 	mgf1 = ntru_mgf1_create(hash_algid, chunk_create(seed, seed_len), TRUE);
 	if (!mgf1)
 	{
@@ -80,7 +81,8 @@ ntru_mgftp1(
 	octets = buf;
 	octets_available = min_calls * md_len;
 
-	DBG2(DBG_LIB, "MGF1 generates %u octets", octets_available);
+	DBG2(DBG_LIB, "MGF1 generates %u octets to extract %d trits",
+				   octets_available, num_trits_needed);
 	if (!mgf1->get_mask(mgf1, octets_available, octets))
 	{
 		mgf1->destroy(mgf1);
@@ -96,7 +98,8 @@ ntru_mgftp1(
 			octets = buf;
 			octets_available = md_len;
 
-			DBG2(DBG_LIB, "MGF1 generates another %u octets", octets_available);
+			DBG2(DBG_LIB, "MGF1 generates another %u octets for the remaining "
+						  "%u trits", octets_available, num_trits_needed);
 			if (!mgf1->get_mask(mgf1, octets_available, octets))
 			{
 				mgf1->destroy(mgf1);
@@ -125,7 +128,8 @@ ntru_mgftp1(
 			octets = buf;
 			octets_available = md_len;
 
-			DBG2(DBG_LIB, "MGF1 generates another %u octets", octets_available);
+			DBG2(DBG_LIB, "MGF1 generates another %u octets for the remaining "
+						  "%u trits", octets_available, num_trits_needed);
 			if (!mgf1->get_mask(mgf1, octets_available, octets))
 			{
 				mgf1->destroy(mgf1);
diff --git a/src/libstrongswan/plugins/ntru/ntru_crypto/ntru_crypto_ntru_poly.c b/src/libstrongswan/plugins/ntru/ntru_crypto/ntru_crypto_ntru_poly.c
index 955544f2f8..e1f4f04a45 100644
--- a/src/libstrongswan/plugins/ntru/ntru_crypto/ntru_crypto_ntru_poly.c
+++ b/src/libstrongswan/plugins/ntru/ntru_crypto/ntru_crypto_ntru_poly.c
@@ -93,6 +93,7 @@ ntru_gen_poly(
 	ntru_mgf1_t *mgf1;
 
     /* generate minimum MGF1 output */
+	DBG2(DBG_LIB, "MGF1 is seeded with %u octets", seed_len);
 	mgf1 = ntru_mgf1_create(hash_algid, chunk_create(seed, seed_len), TRUE);
 	if (!mgf1)
 	{
@@ -102,13 +103,6 @@ ntru_gen_poly(
     octets = buf;
     octets_available = min_calls * md_len;
 
-	DBG2(DBG_LIB, "MGF1 generates %u octets", octets_available);
-	if (!mgf1->get_mask(mgf1, octets_available, octets))
-	{
-		mgf1->destroy(mgf1);
-		return NTRU_MGF1_FAIL;
-	}
-
     /* init indices counts for number of polynomials being generated */
     if (is_product_form) {
 
@@ -134,6 +128,13 @@ ntru_gen_poly(
     memset(used, 0, N);
 
     /* generate indices (IGF-2) for all polynomials */
+	DBG2(DBG_LIB, "MGF1 generates %u octets for %u indices",
+				   octets_available, num_indices);
+	if (!mgf1->get_mask(mgf1, octets_available, octets))
+	{
+		mgf1->destroy(mgf1);
+		return NTRU_MGF1_FAIL;
+	}
 
     while (num_polys > 0) {
 
@@ -166,8 +167,9 @@ ntru_gen_poly(
                         octets = buf;
                         octets_available = md_len;
 
-						DBG2(DBG_LIB, "MGF1 generates another %u octets",
-									   octets_available);
+						DBG2(DBG_LIB, "MGF1 generates another %u octets for the "
+									  "remaining %u indices", octets_available,
+									   num_indices - index_cnt);
 						if (!mgf1->get_mask(mgf1, octets_available, octets))
 						{
 							mgf1->destroy(mgf1);
diff --git a/src/libstrongswan/plugins/ntru/ntru_drbg.c b/src/libstrongswan/plugins/ntru/ntru_drbg.c
index bf8d7fda26..0081223c92 100644
--- a/src/libstrongswan/plugins/ntru/ntru_drbg.c
+++ b/src/libstrongswan/plugins/ntru/ntru_drbg.c
@@ -119,7 +119,7 @@ METHOD(ntru_drbg_t, reseed, bool,
 	chunk_t seed;
 
 	seed = chunk_alloc(this->strength / BITS_PER_BYTE);
-	DBG2(DBG_LIB, "DBRG requesting %u bytes of entropy", seed.len);
+	DBG2(DBG_LIB, "DRG requests %u bytes of entropy", seed.len);
 
 	if (!this->entropy->get_bytes(this->entropy, seed.len, seed.ptr))
 	{
@@ -254,7 +254,7 @@ ntru_drbg_t *ntru_drbg_create(u_int32_t strength, chunk_t pers_str,
 
 	entropy_len = (strength + strength/2) / BITS_PER_BYTE;
 	seed = chunk_alloc(entropy_len + pers_str.len);
-	DBG2(DBG_LIB, "DBRG requesting %u bytes of entropy", entropy_len);
+	DBG2(DBG_LIB, "DRBG requests %u bytes of entropy", entropy_len);
 
 	if (!this->entropy->get_bytes(this->entropy, entropy_len, seed.ptr))
 	{