1 files changed, 112 insertions, 0 deletions
diff --git a/test/unit/nts_ntp_auth.c b/test/unit/nts_ntp_auth.c
new file mode 100644
index 0000000..307b93b
--- /dev/null
+++ b/test/unit/nts_ntp_auth.c
@@ -0,0 +1,112 @@
+/*
+ **********************************************************************
+ * Copyright (C) Miroslav Lichvar  2020
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ * 
+ **********************************************************************
+ */
+
+#include <config.h>
+#include "test.h"
+
+#ifdef FEAT_NTS
+
+#include <nts_ntp_auth.c>
+
+#include "ntp_ext.h"
+#include "siv.h"
+
+void
+test_unit(void)
+{
+  unsigned char key[SIV_MAX_KEY_LENGTH], nonce[256], plaintext[256], plaintext2[256];
+  NTP_PacketInfo info;
+  NTP_Packet packet;
+  SIV_Instance siv;
+  int i, j, r, packet_length, nonce_length, key_length;
+  int plaintext_length, plaintext2_length, min_ef_length;
+
+  siv = SIV_CreateInstance(AEAD_AES_SIV_CMAC_256);
+  TEST_CHECK(siv);
+
+  for (i = 0; i < 10000; i++) {
+    key_length = SIV_GetKeyLength(AEAD_AES_SIV_CMAC_256);
+    for (j = 0; j < key_length; j++)
+      key[j] = random() % 256;
+    TEST_CHECK(SIV_SetKey(siv, key, key_length));
+
+    nonce_length = random() % sizeof (nonce) + 1;
+    for (j = 0; j < nonce_length; j++)
+      nonce[j] = random() % 256;
+
+    plaintext_length = random() % (sizeof (plaintext) + 1);
+    for (j = 0; j < plaintext_length; j++)
+      plaintext[j] = random() % 256;
+
+    packet_length = NTP_HEADER_LENGTH + random() % 100 * 4;
+    min_ef_length = random() % (sizeof (packet) - packet_length);
+
+    memset(&packet, 0, sizeof (packet));
+    packet.lvm = NTP_LVM(0, 4, 0);
+    memset(&info, 0, sizeof (info));
+    info.version = 4;
+    info.length = packet_length;
+
+    DEBUG_LOG("packet_length=%d nonce_length=%d plaintext_length=%d min_ef_length=%d",
+              packet_length, nonce_length, plaintext_length, min_ef_length);
+
+    r = NNA_GenerateAuthEF(&packet, &info, siv, nonce, nonce_length, plaintext,
+                           -1, 0);
+    TEST_CHECK(!r);
+    r = NNA_GenerateAuthEF(&packet, &info, siv, nonce, 0, plaintext,
+                           plaintext_length, 0);
+    TEST_CHECK(!r);
+    r = NNA_GenerateAuthEF(&packet, &info, siv, nonce, nonce_length, plaintext,
+                           plaintext_length, sizeof (packet) - info.length + 1);
+    TEST_CHECK(!r);
+
+    r = NNA_GenerateAuthEF(&packet, &info, siv, nonce, nonce_length, plaintext,
+                           plaintext_length, min_ef_length);
+    TEST_CHECK(r);
+    TEST_CHECK(info.length - packet_length >= min_ef_length);
+
+    r = NNA_DecryptAuthEF(&packet, &info, siv, packet_length, plaintext2,
+                          -1, &plaintext2_length);
+    TEST_CHECK(!r);
+
+    r = NNA_DecryptAuthEF(&packet, &info, siv, packet_length, plaintext2,
+                          sizeof (plaintext2), &plaintext2_length);
+    TEST_CHECK(r);
+    TEST_CHECK(plaintext_length == plaintext2_length);
+    TEST_CHECK(memcmp(plaintext, plaintext2, plaintext_length) == 0);
+
+    j = random() % (packet_length + plaintext_length +
+                    nonce_length + SIV_GetTagLength(siv) + 8) / 4 * 4;
+    ((unsigned char *)&packet)[j]++;
+    r = NNA_DecryptAuthEF(&packet, &info, siv, packet_length, plaintext2,
+                          sizeof (plaintext2), &plaintext2_length);
+    TEST_CHECK(!r);
+    ((unsigned char *)&packet)[j]--;
+  }
+
+  SIV_DestroyInstance(siv);
+}
+#else
+void
+test_unit(void)
+{
+  TEST_REQUIRE(0);
+}
+#endif