// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "verify_name_match.h"

#include "string_util.h"
#include "test_helpers.h"
#include <gtest/gtest.h>

namespace bssl {
namespace {

// Loads test data from file. The filename is constructed from the parameters:
// |prefix| describes the type of data being tested, e.g. "ascii",
// "unicode_bmp", "unicode_supplementary", and "invalid".
// |value_type| indicates what ASN.1 type is used to encode the data.
// |suffix| indicates any additional modifications, such as caseswapping,
// whitespace adding, etc.
::testing::AssertionResult LoadTestData(const std::string& prefix,
                                        const std::string& value_type,
                                        const std::string& suffix,
                                        std::string* result) {
  std::string path = "testdata/verify_name_match_unittest/names/" + prefix +
                     "-" + value_type + "-" + suffix + ".pem";

  const PemBlockMapping mappings[] = {
      {"NAME", result},
  };

  return ReadTestDataFromPemFile(path, mappings);
}

bool TypesAreComparable(const std::string& type_1, const std::string& type_2) {
  if (type_1 == type_2)
    return true;
  if ((type_1 == "PRINTABLESTRING" || type_1 == "UTF8" ||
       type_1 == "BMPSTRING" || type_1 == "UNIVERSALSTRING") &&
      (type_2 == "PRINTABLESTRING" || type_2 == "UTF8" ||
       type_2 == "BMPSTRING" || type_2 == "UNIVERSALSTRING")) {
    return true;
  }
  return false;
}

// 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;
  ASSERT_TRUE(LoadTestData("ascii", value_type(), suffix(), &der));
  EXPECT_TRUE(VerifyNameMatch(SequenceValueFromString(&der),
                              SequenceValueFromString(&der)));

  std::string der_extra_attr;
  ASSERT_TRUE(LoadTestData("ascii", value_type(), suffix() + "-extra_attr",
                           &der_extra_attr));
  EXPECT_TRUE(VerifyNameMatch(SequenceValueFromString(&der_extra_attr),
                              SequenceValueFromString(&der_extra_attr)));

  std::string der_extra_rdn;
  ASSERT_TRUE(LoadTestData("ascii", value_type(), suffix() + "-extra_rdn",
                           &der_extra_rdn));
  EXPECT_TRUE(VerifyNameMatch(SequenceValueFromString(&der_extra_rdn),
                              SequenceValueFromString(&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;
  ASSERT_TRUE(LoadTestData("ascii", value_type(), suffix(), &der));
  std::string der_extra_attr;
  ASSERT_TRUE(LoadTestData("ascii", value_type(), suffix() + "-extra_attr",
                           &der_extra_attr));
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&der),
                               SequenceValueFromString(&der_extra_attr)));
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&der_extra_attr),
                               SequenceValueFromString(&der)));
}

// Ensure that a Name does not match another Name which has the same number of
// RDNs and attributes, but where one of the attributes is duplicated in one of
// the names but not in the other.
TEST_P(VerifyNameMatchSimpleTest, DupeAttrDoesNotMatch) {
  std::string der_dupe_attr;
  ASSERT_TRUE(LoadTestData("ascii", value_type(), suffix() + "-dupe_attr",
                           &der_dupe_attr));
  std::string der_extra_attr;
  ASSERT_TRUE(LoadTestData("ascii", value_type(), suffix() + "-extra_attr",
                           &der_extra_attr));
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&der_dupe_attr),
                               SequenceValueFromString(&der_extra_attr)));
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&der_extra_attr),
                               SequenceValueFromString(&der_dupe_attr)));
  // However, the name with a dupe attribute should match itself.
  EXPECT_TRUE(VerifyNameMatch(SequenceValueFromString(&der_dupe_attr),
                              SequenceValueFromString(&der_dupe_attr)));
}

// 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;
  ASSERT_TRUE(LoadTestData("ascii", value_type(), suffix(), &der));
  std::string der_extra_rdn;
  ASSERT_TRUE(LoadTestData("ascii", value_type(), suffix() + "-extra_rdn",
                           &der_extra_rdn));
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&der),
                               SequenceValueFromString(&der_extra_rdn)));
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&der_extra_rdn),
                               SequenceValueFromString(&der)));
}

// Runs VerifyNameMatchSimpleTest for all combinations of value_type and and
// suffix.
INSTANTIATE_TEST_SUITE_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;
  ASSERT_TRUE(LoadTestData("ascii", value_type(), "unmangled", &normal));
  std::string case_swap;
  ASSERT_TRUE(LoadTestData("ascii", value_type(), "case_swap", &case_swap));
  EXPECT_EQ(expected_result(),
            VerifyNameMatch(SequenceValueFromString(&normal),
                            SequenceValueFromString(&case_swap)));
  EXPECT_EQ(expected_result(),
            VerifyNameMatch(SequenceValueFromString(&case_swap),
                            SequenceValueFromString(&normal)));
}

// Verify matching folds whitespace (for the types which currently support
// normalization).
TEST_P(VerifyNameMatchNormalizationTest, CollapseWhitespace) {
  std::string normal;
  ASSERT_TRUE(LoadTestData("ascii", value_type(), "unmangled", &normal));
  std::string whitespace;
  ASSERT_TRUE(
      LoadTestData("ascii", value_type(), "extra_whitespace", &whitespace));
  EXPECT_EQ(expected_result(),
            VerifyNameMatch(SequenceValueFromString(&normal),
                            SequenceValueFromString(&whitespace)));
  EXPECT_EQ(expected_result(),
            VerifyNameMatch(SequenceValueFromString(&whitespace),
                            SequenceValueFromString(&normal)));
}

// Runs VerifyNameMatchNormalizationTest for each (expected_result, value_type)
// tuple.
INSTANTIATE_TEST_SUITE_P(
    InstantiationName,
    VerifyNameMatchNormalizationTest,
    ::testing::Values(
        ::testing::make_tuple(true,
                              static_cast<const char*>("PRINTABLESTRING")),
        ::testing::make_tuple(false, static_cast<const char*>("T61STRING")),
        ::testing::make_tuple(true, static_cast<const char*>("UTF8")),
        ::testing::make_tuple(true, static_cast<const char*>("BMPSTRING")),
        ::testing::make_tuple(true,
                              static_cast<const char*>("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;
  ASSERT_TRUE(LoadTestData("ascii", value_type_1(), "unmangled", &der_1));
  std::string der_2;
  ASSERT_TRUE(LoadTestData("ascii", value_type_2(), "unmangled", &der_2));
  if (TypesAreComparable(value_type_1(), value_type_2())) {
    EXPECT_TRUE(VerifyNameMatch(SequenceValueFromString(&der_1),
                                SequenceValueFromString(&der_2)));
  } else {
    EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&der_1),
                                 SequenceValueFromString(&der_2)));
  }
}

TEST_P(VerifyNameMatchDifferingTypesTest, NormalizableTypesInSubtrees) {
  std::string der_1;
  ASSERT_TRUE(LoadTestData("ascii", value_type_1(), "unmangled", &der_1));
  std::string der_1_extra_rdn;
  ASSERT_TRUE(LoadTestData("ascii", value_type_1(), "unmangled-extra_rdn",
                           &der_1_extra_rdn));
  std::string der_1_extra_attr;
  ASSERT_TRUE(LoadTestData("ascii", value_type_1(), "unmangled-extra_attr",
                           &der_1_extra_attr));
  std::string der_2;
  ASSERT_TRUE(LoadTestData("ascii", value_type_2(), "unmangled", &der_2));
  std::string der_2_extra_rdn;
  ASSERT_TRUE(LoadTestData("ascii", value_type_2(), "unmangled-extra_rdn",
                           &der_2_extra_rdn));
  std::string der_2_extra_attr;
  ASSERT_TRUE(LoadTestData("ascii", value_type_2(), "unmangled-extra_attr",
                           &der_2_extra_attr));

  if (TypesAreComparable(value_type_1(), value_type_2())) {
    EXPECT_TRUE(VerifyNameInSubtree(SequenceValueFromString(&der_1),
                                    SequenceValueFromString(&der_2)));
    EXPECT_TRUE(VerifyNameInSubtree(SequenceValueFromString(&der_2),
                                    SequenceValueFromString(&der_1)));
    EXPECT_TRUE(VerifyNameInSubtree(SequenceValueFromString(&der_1_extra_rdn),
                                    SequenceValueFromString(&der_2)));
    EXPECT_TRUE(VerifyNameInSubtree(SequenceValueFromString(&der_2_extra_rdn),
                                    SequenceValueFromString(&der_1)));
  } else {
    EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&der_1),
                                     SequenceValueFromString(&der_2)));
    EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&der_2),
                                     SequenceValueFromString(&der_1)));
    EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&der_1_extra_rdn),
                                     SequenceValueFromString(&der_2)));
    EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&der_2_extra_rdn),
                                     SequenceValueFromString(&der_1)));
  }

  EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&der_1),
                                   SequenceValueFromString(&der_2_extra_rdn)));
  EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&der_2),
                                   SequenceValueFromString(&der_1_extra_rdn)));
  EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&der_1_extra_attr),
                                   SequenceValueFromString(&der_2)));
  EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&der_2_extra_attr),
                                   SequenceValueFromString(&der_1)));
  EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&der_1),
                                   SequenceValueFromString(&der_2_extra_attr)));
  EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&der_2),
                                   SequenceValueFromString(&der_1_extra_attr)));
}

// Runs VerifyNameMatchDifferingTypesTest for all combinations of value types in
// value_type1 and value_type_2.
INSTANTIATE_TEST_SUITE_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;
  ASSERT_TRUE(LoadTestData(prefix(), value_type_1(), "unmangled", &der_1));
  std::string der_2;
  ASSERT_TRUE(LoadTestData(prefix(), value_type_2(), "unmangled", &der_2));
  EXPECT_TRUE(VerifyNameMatch(SequenceValueFromString(&der_1),
                              SequenceValueFromString(&der_2)));
}

// Runs VerifyNameMatchUnicodeConversionTest with prefix="unicode_bmp" for all
// combinations of Basic Multilingual Plane-capable value types in value_type1
// and value_type_2.
INSTANTIATE_TEST_SUITE_P(
    BMPConversion,
    VerifyNameMatchUnicodeConversionTest,
    ::testing::Combine(
        ::testing::Values("unicode_bmp"),
        ::testing::Combine(::testing::ValuesIn(kUnicodeBMPValueTypes),
                           ::testing::ValuesIn(kUnicodeBMPValueTypes))));

// Runs VerifyNameMatchUnicodeConversionTest with prefix="unicode_supplementary"
// for all combinations of Unicode Supplementary Plane-capable value types in
// value_type1 and value_type_2.
INSTANTIATE_TEST_SUITE_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 der;
  ASSERT_TRUE(LoadTestData("ascii", "PRINTABLESTRING", "unmangled", &der));
  // Find a known location inside a PrintableString in the DER-encoded data.
  size_t replace_location = der.find("0123456789");
  ASSERT_NE(std::string::npos, replace_location);
  for (int c = 0; c < 256; ++c) {
    SCOPED_TRACE(c);
    if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') ||
        (c >= '0' && c <= '9')) {
      continue;
    }
    switch (c) {
      case ' ':
      case '\'':
      case '(':
      case ')':
      case '*':
      case '+':
      case ',':
      case '-':
      case '.':
      case '/':
      case ':':
      case '=':
      case '?':
        continue;
    }
    der.replace(replace_location, 1, 1, c);
    // Verification should fail due to the invalid character.
    EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&der),
                                 SequenceValueFromString(&der)));
    std::string normalized_der;
    CertErrors errors;
    EXPECT_FALSE(
        NormalizeName(SequenceValueFromString(&der), &normalized_der, &errors));
  }
}

// Matching should fail if an IA5String contains invalid characters.
TEST(VerifyNameMatchInvalidDataTest, FailOnInvalidIA5StringChars) {
  std::string der;
  ASSERT_TRUE(LoadTestData("ascii", "mixed", "rdn_dupetype_sorting_1", &der));
  // Find a known location inside an IA5String in the DER-encoded data.
  size_t replace_location = der.find("eXaMple");
  ASSERT_NE(std::string::npos, replace_location);
  for (int c = 0; c < 256; ++c) {
    SCOPED_TRACE(c);
    der.replace(replace_location, 1, 1, c);
    bool expected_result = (c <= 127);
    EXPECT_EQ(expected_result, VerifyNameMatch(SequenceValueFromString(&der),
                                               SequenceValueFromString(&der)));
    std::string normalized_der;
    CertErrors errors;
    EXPECT_EQ(expected_result, NormalizeName(SequenceValueFromString(&der),
                                             &normalized_der, &errors));
  }
}

TEST(VerifyNameMatchInvalidDataTest, FailOnAttributeTypeAndValueExtraData) {
  std::string invalid;
  ASSERT_TRUE(
      LoadTestData("invalid", "AttributeTypeAndValue", "extradata", &invalid));
  // Verification should fail due to extra element in AttributeTypeAndValue
  // sequence.
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&invalid),
                               SequenceValueFromString(&invalid)));
  std::string normalized_der;
  CertErrors errors;
  EXPECT_FALSE(NormalizeName(SequenceValueFromString(&invalid), &normalized_der,
                             &errors));
}

TEST(VerifyNameMatchInvalidDataTest, FailOnAttributeTypeAndValueShort) {
  std::string invalid;
  ASSERT_TRUE(LoadTestData("invalid", "AttributeTypeAndValue", "onlyOneElement",
                           &invalid));
  // Verification should fail due to AttributeTypeAndValue sequence having only
  // one element.
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&invalid),
                               SequenceValueFromString(&invalid)));
  std::string normalized_der;
  CertErrors errors;
  EXPECT_FALSE(NormalizeName(SequenceValueFromString(&invalid), &normalized_der,
                             &errors));
}

TEST(VerifyNameMatchInvalidDataTest, FailOnAttributeTypeAndValueEmpty) {
  std::string invalid;
  ASSERT_TRUE(
      LoadTestData("invalid", "AttributeTypeAndValue", "empty", &invalid));
  // Verification should fail due to empty AttributeTypeAndValue sequence.
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&invalid),
                               SequenceValueFromString(&invalid)));
  std::string normalized_der;
  CertErrors errors;
  EXPECT_FALSE(NormalizeName(SequenceValueFromString(&invalid), &normalized_der,
                             &errors));
}

TEST(VerifyNameMatchInvalidDataTest, FailOnBadAttributeType) {
  std::string invalid;
  ASSERT_TRUE(LoadTestData("invalid", "AttributeTypeAndValue",
                           "badAttributeType", &invalid));
  // Verification should fail due to Attribute Type not being an OID.
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&invalid),
                               SequenceValueFromString(&invalid)));
  std::string normalized_der;
  CertErrors errors;
  EXPECT_FALSE(NormalizeName(SequenceValueFromString(&invalid), &normalized_der,
                             &errors));
}

TEST(VerifyNameMatchInvalidDataTest, FailOnAttributeTypeAndValueNotSequence) {
  std::string invalid;
  ASSERT_TRUE(LoadTestData("invalid", "AttributeTypeAndValue", "setNotSequence",
                           &invalid));
  // Verification should fail due to AttributeTypeAndValue being a Set instead
  // of a Sequence.
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&invalid),
                               SequenceValueFromString(&invalid)));
  std::string normalized_der;
  CertErrors errors;
  EXPECT_FALSE(NormalizeName(SequenceValueFromString(&invalid), &normalized_der,
                             &errors));
}

TEST(VerifyNameMatchInvalidDataTest, FailOnRdnNotSet) {
  std::string invalid;
  ASSERT_TRUE(LoadTestData("invalid", "RDN", "sequenceInsteadOfSet", &invalid));
  // Verification should fail due to RDN being a Sequence instead of a Set.
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&invalid),
                               SequenceValueFromString(&invalid)));
  std::string normalized_der;
  CertErrors errors;
  EXPECT_FALSE(NormalizeName(SequenceValueFromString(&invalid), &normalized_der,
                             &errors));
}

TEST(VerifyNameMatchInvalidDataTest, FailOnEmptyRdn) {
  std::string invalid;
  ASSERT_TRUE(LoadTestData("invalid", "RDN", "empty", &invalid));
  // Verification should fail due to RDN having zero AttributeTypeAndValues.
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&invalid),
                               SequenceValueFromString(&invalid)));
  std::string normalized_der;
  CertErrors errors;
  EXPECT_FALSE(NormalizeName(SequenceValueFromString(&invalid), &normalized_der,
                             &errors));
}

// Matching should fail if a BMPString contains surrogates.
TEST(VerifyNameMatchInvalidDataTest, FailOnBmpStringSurrogates) {
  std::string normal;
  ASSERT_TRUE(LoadTestData("unicode_bmp", "BMPSTRING", "unmangled", &normal));
  // 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, std::string("\xd8\x35\xdc\x00", 4));
  // Verification should fail due to the invalid codepoints.
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&invalid),
                               SequenceValueFromString(&invalid)));
  std::string normalized_der;
  CertErrors errors;
  EXPECT_FALSE(NormalizeName(SequenceValueFromString(&invalid), &normalized_der,
                             &errors));
}

TEST(VerifyNameMatchTest, EmptyNameMatching) {
  std::string empty;
  ASSERT_TRUE(LoadTestData("valid", "Name", "empty", &empty));
  // Empty names are equal.
  EXPECT_TRUE(VerifyNameMatch(SequenceValueFromString(&empty),
                              SequenceValueFromString(&empty)));
  // An empty name normalized is unchanged.
  std::string normalized_empty_der;
  CertErrors errors;
  EXPECT_TRUE(NormalizeName(SequenceValueFromString(&empty),
                            &normalized_empty_der, &errors));
  EXPECT_EQ(SequenceValueFromString(&empty), der::Input(&normalized_empty_der));

  // An empty name is not equal to non-empty name.
  std::string non_empty;
  ASSERT_TRUE(
      LoadTestData("ascii", "PRINTABLESTRING", "unmangled", &non_empty));
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&empty),
                               SequenceValueFromString(&non_empty)));
  EXPECT_FALSE(VerifyNameMatch(SequenceValueFromString(&non_empty),
                               SequenceValueFromString(&empty)));
}

// Matching should succeed when the RDNs are sorted differently but are still
// equal after normalizing.
TEST(VerifyNameMatchRDNSorting, Simple) {
  std::string a;
  ASSERT_TRUE(LoadTestData("ascii", "PRINTABLESTRING", "rdn_sorting_1", &a));
  std::string b;
  ASSERT_TRUE(LoadTestData("ascii", "PRINTABLESTRING", "rdn_sorting_2", &b));
  EXPECT_TRUE(VerifyNameMatch(SequenceValueFromString(&a),
                              SequenceValueFromString(&b)));
  EXPECT_TRUE(VerifyNameMatch(SequenceValueFromString(&b),
                              SequenceValueFromString(&a)));
}

// Matching should succeed when the RDNs are sorted differently but are still
// equal after normalizing, even in malformed RDNs that contain multiple
// elements with the same type.
TEST(VerifyNameMatchRDNSorting, DuplicateTypes) {
  std::string a;
  ASSERT_TRUE(LoadTestData("ascii", "mixed", "rdn_dupetype_sorting_1", &a));
  std::string b;
  ASSERT_TRUE(LoadTestData("ascii", "mixed", "rdn_dupetype_sorting_2", &b));
  EXPECT_TRUE(VerifyNameMatch(SequenceValueFromString(&a),
                              SequenceValueFromString(&b)));
  EXPECT_TRUE(VerifyNameMatch(SequenceValueFromString(&b),
                              SequenceValueFromString(&a)));
}

TEST(VerifyNameInSubtreeInvalidDataTest, FailOnEmptyRdn) {
  std::string valid;
  ASSERT_TRUE(LoadTestData("ascii", "PRINTABLESTRING", "unmangled", &valid));
  std::string invalid;
  ASSERT_TRUE(LoadTestData("invalid", "RDN", "empty", &invalid));
  // For both |name| and |parent|, a RelativeDistinguishedName must have at
  // least one AttributeTypeAndValue.
  EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&valid),
                                   SequenceValueFromString(&invalid)));
  EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&invalid),
                                   SequenceValueFromString(&valid)));
  EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&invalid),
                                   SequenceValueFromString(&invalid)));
}

TEST(VerifyNameInSubtreeTest, EmptyNameMatching) {
  std::string empty;
  ASSERT_TRUE(LoadTestData("valid", "Name", "empty", &empty));
  std::string non_empty;
  ASSERT_TRUE(
      LoadTestData("ascii", "PRINTABLESTRING", "unmangled", &non_empty));
  // Empty name is in the subtree defined by empty name.
  EXPECT_TRUE(VerifyNameInSubtree(SequenceValueFromString(&empty),
                                  SequenceValueFromString(&empty)));
  // Any non-empty name is in the subtree defined by empty name.
  EXPECT_TRUE(VerifyNameInSubtree(SequenceValueFromString(&non_empty),
                                  SequenceValueFromString(&empty)));
  // Empty name is not in the subtree defined by non-empty name.
  EXPECT_FALSE(VerifyNameInSubtree(SequenceValueFromString(&empty),
                                   SequenceValueFromString(&non_empty)));
}

// Verify that the normalized output matches the pre-generated expected value
// for a single larger input that exercises all of the string types, unicode
// (basic and supplemental planes), whitespace collapsing, case folding, as
// well as SET sorting.
TEST(NameNormalizationTest, TestEverything) {
  std::string expected_normalized_der;
  ASSERT_TRUE(
      LoadTestData("unicode", "mixed", "normalized", &expected_normalized_der));

  std::string raw_der;
  ASSERT_TRUE(LoadTestData("unicode", "mixed", "unnormalized", &raw_der));
  std::string normalized_der;
  CertErrors errors;
  ASSERT_TRUE(NormalizeName(SequenceValueFromString(&raw_der), &normalized_der,
                            &errors));
  EXPECT_EQ(SequenceValueFromString(&expected_normalized_der),
            der::Input(&normalized_der));
  // Re-normalizing an already normalized Name should not change it.
  std::string renormalized_der;
  ASSERT_TRUE(
      NormalizeName(der::Input(&normalized_der), &renormalized_der, &errors));
  EXPECT_EQ(normalized_der, renormalized_der);
}

// Unknown AttributeValue types normalize as-is, even non-primitive tags.
TEST(NameNormalizationTest, NormalizeCustom) {
  std::string raw_der;
  ASSERT_TRUE(LoadTestData("custom", "custom", "normalized", &raw_der));

  std::string normalized_der;
  CertErrors errors;
  ASSERT_TRUE(NormalizeName(SequenceValueFromString(&raw_der), &normalized_der,
                            &errors));
  EXPECT_EQ(SequenceValueFromString(&raw_der), der::Input(&normalized_der));
}

}  // namespace net