RFC 2459 name comparison.

net/cert/internal/verify_name_match_unittest.cc

 // Copyright 2015 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/cert/internal/verify_name_match.h"
 
+#include "base/base_paths.h"
+#include "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/path_service.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
 #include "net/der/input.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
-
-TEST(VerifyNameMatchTest, Simple) {
-  // TODO(mattm): Use valid Names.
-  const uint8_t hello[] = {'h', 'e', 'l', 'l', 'o'};
-  const uint8_t aello[] = {'a', 'e', 'l', 'l', 'o'};
-  const uint8_t hello1[] = {'h', 'e', 'l', 'l', 'o', '1'};
-  EXPECT_TRUE(VerifyNameMatch(der::Input(hello), der::Input(hello)));
-  EXPECT_FALSE(VerifyNameMatch(der::Input(aello), der::Input(hello)));
-  EXPECT_FALSE(VerifyNameMatch(der::Input(hello), der::Input(hello1)));
-  EXPECT_FALSE(VerifyNameMatch(der::Input(hello1), der::Input(hello)));
+namespace {
+
+der::Input InputFromString(const std::string& s) {
+  return der::Input(reinterpret_cast<const uint8_t*>(s.data()), s.size());
+}
+
+std::string LoadTestData(const std::string& prefix,
+                         const std::string& value_type,
+                         const std::string& suffix) {
+  base::FilePath src_root;
+  PathService::Get(base::DIR_SOURCE_ROOT, &src_root);
+  std::string filename = prefix + "-" + value_type + "-" + suffix + ".der";
+  base::FilePath filepath =
+      src_root.Append("net/data/verify_name_match_unittest/names")
+          .Append(filename);
+  std::string result;
+  bool success = base::ReadFileToString(filepath, &result);
+  EXPECT_TRUE(success);
+  return result;
+}
+
+// All string types.
+static const char* kValueTypes[] = {"PRINTABLESTRING",
+                                    "T61STRING",
+                                    "UTF8",
+                                    "BMPSTRING",
+                                    "UNIVERSALSTRING"};
+// String types that can encode the Unicode Basic Multilingual Plane.
+static const char* kUnicodeBMPValueTypes[] = {"UTF8",
+                                              "BMPSTRING",
+                                              "UNIVERSALSTRING"};
+// String types that can encode the Unicode Supplementary Planes.
+static const char* kUnicodeSupplementaryValueTypes[] = {"UTF8",
+                                                        "UNIVERSALSTRING"};
+
+static const char* kMangleTypes[] = {"unmangled",
+                                     "case_swap",
+                                     "extra_whitespace"};
+
+}  // namespace
+
+class VerifyNameMatchSimpleTest
+    : public ::testing::TestWithParam<
+          ::testing::tuple<const char*, const char*>> {
+ public:
+  std::string value_type() const { return ::testing::get<0>(GetParam()); }
+  std::string suffix() const { return ::testing::get<1>(GetParam()); }
+};
+
+// Compare each input against itself, verifies that all input data is parsed
+// successfully.
+TEST_P(VerifyNameMatchSimpleTest, ExactEquality) {
+  std::string der = LoadTestData("ascii", value_type(), suffix());
+  EXPECT_TRUE(VerifyNameMatch(InputFromString(der), InputFromString(der)));
+
+  std::string der_extra_attr =
+      LoadTestData("ascii", value_type(), suffix() + "-extra_attr");
+  EXPECT_TRUE(VerifyNameMatch(InputFromString(der_extra_attr),
+                              InputFromString(der_extra_attr)));
+
+  std::string der_extra_rdn =
+      LoadTestData("ascii", value_type(), suffix() + "-extra_rdn");
+  EXPECT_TRUE(VerifyNameMatch(InputFromString(der_extra_rdn),
+                              InputFromString(der_extra_rdn)));
+}
+
+// Ensure that a Name does not match another Name which is exactly the same but
+// with an extra attribute in one Relative Distinguished Name.
+TEST_P(VerifyNameMatchSimpleTest, ExtraAttrDoesNotMatch) {
+  std::string der = LoadTestData("ascii", value_type(), suffix());
+  std::string der_extra_attr =
+      LoadTestData("ascii", value_type(), suffix() + "-extra_attr");
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(der), InputFromString(der_extra_attr)));
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(der_extra_attr), InputFromString(der)));
+}
+
+// Ensure that a Name does not match another Name which is exactly the same but
+// with an extra Relative Distinguished Name.
+TEST_P(VerifyNameMatchSimpleTest, ExtraRdnDoesNotMatch) {
+  std::string der = LoadTestData("ascii", value_type(), suffix());
+  std::string der_extra_rdn =
+      LoadTestData("ascii", value_type(), suffix() + "-extra_rdn");
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(der), InputFromString(der_extra_rdn)));
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(der_extra_rdn), InputFromString(der)));
+}
+
+INSTANTIATE_TEST_CASE_P(InstantiationName,
+                        VerifyNameMatchSimpleTest,
+                        ::testing::Combine(::testing::ValuesIn(kValueTypes),
+                                           ::testing::ValuesIn(kMangleTypes)));
+
+class VerifyNameMatchNormalizationTest
+    : public ::testing::TestWithParam<::testing::tuple<bool, const char*>> {
+ public:
+  bool expected_result() const { return ::testing::get<0>(GetParam()); }
+  std::string value_type() const { return ::testing::get<1>(GetParam()); }
+};
+
+// Verify matching is case insensitive (for the types which currently support
+// normalization).
+TEST_P(VerifyNameMatchNormalizationTest, CaseInsensitivity) {
+  std::string normal = LoadTestData("ascii", value_type(), "unmangled");
+  std::string case_swap = LoadTestData("ascii", value_type(), "case_swap");
+  EXPECT_EQ(expected_result(), VerifyNameMatch(InputFromString(normal),
+                                               InputFromString(case_swap)));
+  EXPECT_EQ(expected_result(), VerifyNameMatch(InputFromString(case_swap),
+                                               InputFromString(normal)));
+}
+
+// Verify matching folds whitespace (for the types which currently support
+// normalization).
+TEST_P(VerifyNameMatchNormalizationTest, CollapseWhitespace) {
+  std::string normal = LoadTestData("ascii", value_type(), "unmangled");
+  std::string whitespace =
+      LoadTestData("ascii", value_type(), "extra_whitespace");
+  EXPECT_EQ(expected_result(), VerifyNameMatch(InputFromString(normal),
+                                               InputFromString(whitespace)));
+  EXPECT_EQ(expected_result(), VerifyNameMatch(InputFromString(whitespace),
+                                               InputFromString(normal)));
+}
+
+INSTANTIATE_TEST_CASE_P(
+    InstantiationName,
+    VerifyNameMatchNormalizationTest,
+    ::testing::Values(::testing::make_tuple(true, "PRINTABLESTRING"),
+                      ::testing::make_tuple(false, "T61STRING"),
+                      ::testing::make_tuple(true, "UTF8"),
+                      ::testing::make_tuple(true, "BMPSTRING"),
+                      ::testing::make_tuple(true, "UNIVERSALSTRING")));
+
+class VerifyNameMatchDifferingTypesTest
+    : public ::testing::TestWithParam<
+          ::testing::tuple<const char*, const char*>> {
+ public:
+  std::string value_type_1() const { return ::testing::get<0>(GetParam()); }
+  std::string value_type_2() const { return ::testing::get<1>(GetParam()); }
+};
+
+TEST_P(VerifyNameMatchDifferingTypesTest, NormalizableTypesAreEqual) {
+  std::string der_1 = LoadTestData("ascii", value_type_1(), "unmangled");
+  std::string der_2 = LoadTestData("ascii", value_type_2(), "unmangled");
+  if (value_type_1() == value_type_2()) {
+    EXPECT_TRUE(
+        VerifyNameMatch(InputFromString(der_1), InputFromString(der_2)));
+  } else if ((value_type_1() == "PRINTABLESTRING" || value_type_1() == "UTF8" ||
+              value_type_1() == "BMPSTRING" ||
+              value_type_1() == "UNIVERSALSTRING") &&
+             (value_type_2() == "PRINTABLESTRING" || value_type_2() == "UTF8" ||
+              value_type_2() == "BMPSTRING" ||
+              value_type_2() == "UNIVERSALSTRING")) {
+    EXPECT_TRUE(
+        VerifyNameMatch(InputFromString(der_1), InputFromString(der_2)));
+  } else {
+    EXPECT_FALSE(
+        VerifyNameMatch(InputFromString(der_1), InputFromString(der_2)));
+  }
+}
+
+INSTANTIATE_TEST_CASE_P(InstantiationName,
+                        VerifyNameMatchDifferingTypesTest,
+                        ::testing::Combine(::testing::ValuesIn(kValueTypes),
+                                           ::testing::ValuesIn(kValueTypes)));
+
+class VerifyNameMatchUnicodeConversionTest
+    : public ::testing::TestWithParam<
+          ::testing::tuple<const char*,
+                           ::testing::tuple<const char*, const char*>>> {
+ public:
+  std::string prefix() const { return ::testing::get<0>(GetParam()); }
+  std::string value_type_1() const {
+    return ::testing::get<0>(::testing::get<1>(GetParam()));
+  }
+  std::string value_type_2() const {
+    return ::testing::get<1>(::testing::get<1>(GetParam()));
+  }
+};
+
+TEST_P(VerifyNameMatchUnicodeConversionTest, UnicodeConversionsAreEqual) {
+  std::string der_1 = LoadTestData(prefix(), value_type_1(), "unmangled");
+  std::string der_2 = LoadTestData(prefix(), value_type_2(), "unmangled");
+  EXPECT_TRUE(VerifyNameMatch(InputFromString(der_1), InputFromString(der_2)));
+}
+
+INSTANTIATE_TEST_CASE_P(
+    BMPConversion,
+    VerifyNameMatchUnicodeConversionTest,
+    ::testing::Combine(
+        ::testing::Values("unicode_bmp"),
+        ::testing::Combine(::testing::ValuesIn(kUnicodeBMPValueTypes),
+                           ::testing::ValuesIn(kUnicodeBMPValueTypes))));
+
+INSTANTIATE_TEST_CASE_P(
+    SMPConversion,
+    VerifyNameMatchUnicodeConversionTest,
+    ::testing::Combine(
+        ::testing::Values("unicode_supplementary"),
+        ::testing::Combine(
+            ::testing::ValuesIn(kUnicodeSupplementaryValueTypes),
+            ::testing::ValuesIn(kUnicodeSupplementaryValueTypes))));
+
+// Matching should fail if a PrintableString contains invalid characters.
+TEST(VerifyNameMatchInvalidDataTest, FailOnInvalidPrintableStringChars) {
+  std::string normal = LoadTestData("ascii", "PRINTABLESTRING", "unmangled");
+  // Find a known location inside a PrintableString in the DER-encoded data.
+  size_t replace_location = normal.find("0123456789");
+  ASSERT_NE(std::string::npos, replace_location);
+  for (int c = 0; c < 256; ++c) {
+    SCOPED_TRACE(base::IntToString(c));
+    if (IsAsciiAlpha(c) || IsAsciiDigit(c))
+      continue;
+    switch (c) {
+      case ' ':
+      case '\'':
+      case '(':
+      case ')':
+      case '*':
+      case '+':
+      case ',':
+      case '-':
+      case '.':
+      case '/':
+      case ':':
+      case '=':
+      case '?':
+        continue;
+    }
+    std::string invalid = normal.replace(replace_location, 1, 1, c);
+    // Verification should fail due to the invalid character.
+    EXPECT_FALSE(
+        VerifyNameMatch(InputFromString(invalid), InputFromString(invalid)));
+  }
+}
+
+TEST(VerifyNameMatchInvalidDataTest, FailOnAttributeTypeAndValueExtraData) {
+  std::string invalid =
+      LoadTestData("invalid", "AttributeTypeAndValue", "extradata");
+  // Verification should fail due to extra element in AttributeTypeAndValue
+  // sequence.
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(invalid), InputFromString(invalid)));
+}
+
+TEST(VerifyNameMatchInvalidDataTest, FailOnAttributeTypeAndValueShort) {
+  std::string invalid =
+      LoadTestData("invalid", "AttributeTypeAndValue", "onlyOneElement");
+  // Verification should fail due to AttributeTypeAndValue sequence having only
+  // one element.
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(invalid), InputFromString(invalid)));
+}
+
+TEST(VerifyNameMatchInvalidDataTest, FailOnAttributeTypeAndValueEmpty) {
+  std::string invalid =
+      LoadTestData("invalid", "AttributeTypeAndValue", "empty");
+  // Verification should fail due to empty AttributeTypeAndValue sequence.
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(invalid), InputFromString(invalid)));
+}
+
+TEST(VerifyNameMatchInvalidDataTest, FailOnBadAttributeType) {
+  std::string invalid =
+      LoadTestData("invalid", "AttributeTypeAndValue", "badAttributeType");
+  // Verification should fail due to Attribute Type not being an OID.
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(invalid), InputFromString(invalid)));
+}
+
+TEST(VerifyNameMatchInvalidDataTest, FailOnAttributeTypeAndValueNotSequence) {
+  std::string invalid =
+      LoadTestData("invalid", "AttributeTypeAndValue", "setNotSequence");
+  // Verification should fail due to AttributeTypeAndValue being a Set instead
+  // of a Sequence.
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(invalid), InputFromString(invalid)));
+}
+
+TEST(VerifyNameMatchInvalidDataTest, FailOnRdnNotSet) {
+  std::string invalid = LoadTestData("invalid", "RDN", "sequenceInsteadOfSet");
+  // Verification should fail due to RDN being a Sequence instead of a Set.
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(invalid), InputFromString(invalid)));
+}
+
+TEST(VerifyNameMatchInvalidDataTest, FailOnEmptyRdn) {
+  std::string invalid = LoadTestData("invalid", "RDN", "empty");
+  // Verification should fail due to RDN having zero AttributeTypeAndValues.
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(invalid), InputFromString(invalid)));
+}
+
+TEST(VerifyNameMatchInvalidDataTest, FailOnNameNotSequence) {
+  std::string invalid = LoadTestData("invalid", "Name", "setInsteadOfSequence");
+  // Verification should fail due to Name being a Set instead of a Sequence.
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(invalid), InputFromString(invalid)));
+}
+
+TEST(VerifyNameMatchInvalidDataTest, FailOnEmptyName) {
+  std::string invalid = LoadTestData("invalid", "Name", "empty");
+  // Verification should fail due to Name having zero RDNs.
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(invalid), InputFromString(invalid)));
+}
+
+TEST(VerifyNameMatchInvalidDataTest, FailOnTrailingData) {
+  std::string invalid =
+      LoadTestData("ascii", "PRINTABLESTRING", "unmangled") + "X";
+  // Verification should fail due to the appended character.
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(invalid), InputFromString(invalid)));
+}
+
+// Matching should fail if a BMPString contains surrogates.
+TEST(VerifyNameMatchInvalidDataTest, FailOnBmpStringSurrogates) {
+  std::string normal = LoadTestData("unicode_bmp", "BMPSTRING", "unmangled");
+  // Find a known location inside a BMPSTRING in the DER-encoded data.
+  size_t replace_location = normal.find("\x67\x71\x4e\xac");
+  ASSERT_NE(std::string::npos, replace_location);
+  // Replace with U+1D400 MATHEMATICAL BOLD CAPITAL A, which requires surrogates
+  // to represent.
+  std::string invalid = normal.replace(replace_location, 4, "\xd8\x35\xdc\x00");
+  // Verification should fail due to the invalid codepoints.
+  EXPECT_FALSE(
+      VerifyNameMatch(InputFromString(invalid), InputFromString(invalid)));
 }
 
 }  // namespace net