ForceTLS: hash hostnames, handle subdomains, canonicalise.

net/base/dns_util_unittest.cc

+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/base/dns_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+
+class DNSUtilTest : public testing::Test {
+};
+
+TEST_F(DNSUtilTest, DNSDomainFromDot) {
+  std::string out;
+
+  EXPECT_TRUE(DNSDomainFromDot("", &out));
+  EXPECT_EQ(out, "");
+  EXPECT_TRUE(DNSDomainFromDot("com", &out));
+  EXPECT_EQ(out, "\003com");
+  EXPECT_TRUE(DNSDomainFromDot("google.com", &out));
+  EXPECT_EQ(out, "\x006google\003com");
+  EXPECT_TRUE(DNSDomainFromDot("www.google.com", &out));
+  EXPECT_EQ(out, "\003www\006google\003com");
+
+  // Label is 63 chars: still valid
+  EXPECT_TRUE(DNSDomainFromDot("123456789a123456789a123456789a123456789a123456789a123456789a123", &out));
+  EXPECT_EQ(out, "\077123456789a123456789a123456789a123456789a123456789a123456789a123");
+
+  // Label is too long: invalid
+  EXPECT_FALSE(DNSDomainFromDot("123456789a123456789a123456789a123456789a123456789a123456789a1234", &out));
+
+  // 253 characters in the name: still valid
+  EXPECT_TRUE(DNSDomainFromDot("123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123", &out));
+  EXPECT_EQ(out, "\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\011123456789\003123");
+
+  // 254 characters in the name: invalid
+  EXPECT_FALSE(DNSDomainFromDot("123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.1234", &out));
+
+  // Zero length labels should be dropped.
+  EXPECT_TRUE(DNSDomainFromDot("www.google.com.", &out));
+  EXPECT_EQ(out, "\003www\006google\003com");
+
+  EXPECT_TRUE(DNSDomainFromDot(".google.com", &out));
+  EXPECT_EQ(out, "\006google\003com");
+}
+
+TEST_F(DNSUtilTest, STD3ASCII) {
+  EXPECT_TRUE(IsSTD3ASCIIValidCharacter('a'));
+  EXPECT_TRUE(IsSTD3ASCIIValidCharacter('b'));
+  EXPECT_TRUE(IsSTD3ASCIIValidCharacter('c'));
+  EXPECT_TRUE(IsSTD3ASCIIValidCharacter('1'));
+  EXPECT_TRUE(IsSTD3ASCIIValidCharacter('2'));
+  EXPECT_TRUE(IsSTD3ASCIIValidCharacter('3'));
+
+  EXPECT_FALSE(IsSTD3ASCIIValidCharacter('.'));
+  EXPECT_FALSE(IsSTD3ASCIIValidCharacter('/'));
+  EXPECT_FALSE(IsSTD3ASCIIValidCharacter('\x00'));
+}
+
+}  // namespace net