net/cert/ct_serialization_unittest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/cert/ct_serialization.h"
   6
   7 #include <string>
   8
   9 #include "base/files/file_path.h"
  10 #include "base/files/file_util.h"
  11 #include "net/base/test_completion_callback.h"
  12 #include "net/base/test_data_directory.h"
  13 #include "net/cert/x509_certificate.h"
  14 #include "net/log/net_log.h"
  15 #include "net/test/cert_test_util.h"
  16 #include "net/test/ct_test_util.h"
  17 #include "testing/gtest/include/gtest/gtest.h"
  18
  19 namespace net {
  20
  21 class CtSerializationTest : public ::testing::Test {
  22  public:
  23   void SetUp() override {
  24     test_digitally_signed_ = ct::GetTestDigitallySigned();
  25   }
  26
  27  protected:
  28   std::string test_digitally_signed_;
  29 };
  30
  31 TEST_F(CtSerializationTest, DecodesDigitallySigned) {
  32   base::StringPiece digitally_signed(test_digitally_signed_);
  33   ct::DigitallySigned parsed;
  34
  35   ASSERT_TRUE(ct::DecodeDigitallySigned(&digitally_signed, &parsed));
  36   EXPECT_EQ(
  37       ct::DigitallySigned::HASH_ALGO_SHA256,
  38       parsed.hash_algorithm);
  39
  40   EXPECT_EQ(
  41       ct::DigitallySigned::SIG_ALGO_ECDSA,
  42       parsed.signature_algorithm);
  43
  44   // The encoded data contains the signature itself from the 4th byte.
  45   // The first bytes are:
  46   // 1 byte of hash algorithm
  47   // 1 byte of signature algorithm
  48   // 2 bytes - prefix containing length of the signature data.
  49   EXPECT_EQ(
  50       test_digitally_signed_.substr(4),
  51       parsed.signature_data);
  52 }
  53
  54
  55 TEST_F(CtSerializationTest, FailsToDecodePartialDigitallySigned) {
  56   base::StringPiece digitally_signed(test_digitally_signed_);
  57   base::StringPiece partial_digitally_signed(
  58       digitally_signed.substr(0, test_digitally_signed_.size() - 5));
  59   ct::DigitallySigned parsed;
  60
  61   ASSERT_FALSE(ct::DecodeDigitallySigned(&partial_digitally_signed, &parsed));
  62 }
  63
  64
  65 TEST_F(CtSerializationTest, EncodesDigitallySigned) {
  66   ct::DigitallySigned digitally_signed;
  67   digitally_signed.hash_algorithm = ct::DigitallySigned::HASH_ALGO_SHA256;
  68   digitally_signed.signature_algorithm = ct::DigitallySigned::SIG_ALGO_ECDSA;
  69   digitally_signed.signature_data = test_digitally_signed_.substr(4);
  70
  71   std::string encoded;
  72
  73   ASSERT_TRUE(ct::EncodeDigitallySigned(digitally_signed, &encoded));
  74   EXPECT_EQ(test_digitally_signed_, encoded);
  75 }
  76
  77
  78 TEST_F(CtSerializationTest, EncodesLogEntryForX509Cert) {
  79   ct::LogEntry entry;
  80   GetX509CertLogEntry(&entry);
  81
  82   std::string encoded;
  83   ASSERT_TRUE(ct::EncodeLogEntry(entry, &encoded));
  84   EXPECT_EQ((718U + 5U), encoded.size());
  85   // First two bytes are log entry type. Next, length:
  86   // Length is 718 which is 512 + 206, which is 0x2ce
  87   std::string expected_prefix("\0\0\0\x2\xCE", 5);
  88   // Note we use std::string comparison rather than ASSERT_STREQ due
  89   // to null characters in the buffer.
  90   EXPECT_EQ(expected_prefix, encoded.substr(0, 5));
  91 }
  92
  93 TEST_F(CtSerializationTest, EncodesV1SCTSignedData) {
  94   base::Time timestamp = base::Time::UnixEpoch() +
  95       base::TimeDelta::FromMilliseconds(1348589665525);
  96   std::string dummy_entry("abc");
  97   std::string empty_extensions;
  98   // For now, no known failure cases.
  99   std::string encoded;
 100   ASSERT_TRUE(ct::EncodeV1SCTSignedData(
 101       timestamp,
 102       dummy_entry,
 103       empty_extensions,
 104       &encoded));
 105   EXPECT_EQ((size_t) 15, encoded.size());
 106   // Byte 0 is version, byte 1 is signature type
 107   // Bytes 2-10 are timestamp
 108   // Bytes 11-14 are the log signature
 109   // Byte 15 is the empty extension
 110   //EXPECT_EQ(0, timestamp.ToTimeT());
 111   std::string expected_buffer(
 112       "\x0\x0\x0\x0\x1\x39\xFE\x35\x3C\xF5\x61\x62\x63\x0\x0", 15);
 113   EXPECT_EQ(expected_buffer, encoded);
 114 }
 115
 116 TEST_F(CtSerializationTest, DecodesSCTList) {
 117   // Two items in the list: "abc", "def"
 118   base::StringPiece encoded("\x0\xa\x0\x3\x61\x62\x63\x0\x3\x64\x65\x66", 12);
 119   std::vector<base::StringPiece> decoded;
 120
 121   ASSERT_TRUE(ct::DecodeSCTList(&encoded, &decoded));
 122   ASSERT_STREQ("abc", decoded[0].data());
 123   ASSERT_STREQ("def", decoded[1].data());
 124 }
 125
 126 TEST_F(CtSerializationTest, FailsDecodingInvalidSCTList) {
 127   // A list with one item that's too short
 128   base::StringPiece encoded("\x0\xa\x0\x3\x61\x62\x63\x0\x5\x64\x65\x66", 12);
 129   std::vector<base::StringPiece> decoded;
 130
 131   ASSERT_FALSE(ct::DecodeSCTList(&encoded, &decoded));
 132 }
 133
 134 TEST_F(CtSerializationTest, DecodesSignedCertificateTimestamp) {
 135   std::string encoded_test_sct(ct::GetTestSignedCertificateTimestamp());
 136   base::StringPiece encoded_sct(encoded_test_sct);
 137
 138   scoped_refptr<ct::SignedCertificateTimestamp> sct;
 139   ASSERT_TRUE(ct::DecodeSignedCertificateTimestamp(&encoded_sct, &sct));
 140   EXPECT_EQ(0, sct->version);
 141   EXPECT_EQ(ct::GetTestPublicKeyId(), sct->log_id);
 142   base::Time expected_time = base::Time::UnixEpoch() +
 143       base::TimeDelta::FromMilliseconds(1365181456089);
 144   EXPECT_EQ(expected_time, sct->timestamp);
 145   // Subtracting 4 bytes for signature data (hash & sig algs),
 146   // actual signature data should be 71 bytes.
 147   EXPECT_EQ((size_t) 71, sct->signature.signature_data.size());
 148   EXPECT_TRUE(sct->extensions.empty());
 149 }
 150
 151 TEST_F(CtSerializationTest, FailsDecodingInvalidSignedCertificateTimestamp) {
 152   // Invalid version
 153   base::StringPiece invalid_version_sct("\x2\x0", 2);
 154   scoped_refptr<ct::SignedCertificateTimestamp> sct;
 155
 156   ASSERT_FALSE(
 157       ct::DecodeSignedCertificateTimestamp(&invalid_version_sct, &sct));
 158
 159   // Valid version, invalid length (missing data)
 160   base::StringPiece invalid_length_sct("\x0\xa\xb\xc", 4);
 161   ASSERT_FALSE(
 162       ct::DecodeSignedCertificateTimestamp(&invalid_length_sct, &sct));
 163 }
 164
 165 TEST_F(CtSerializationTest, EncodesValidSignedTreeHead) {
 166   ct::SignedTreeHead signed_tree_head;
 167   GetSampleSignedTreeHead(&signed_tree_head);
 168
 169   std::string encoded;
 170   ct::EncodeTreeHeadSignature(signed_tree_head, &encoded);
 171   // Expected size is 50 bytes:
 172   // Byte 0 is version, byte 1 is signature type
 173   // Bytes 2-9 are timestamp
 174   // Bytes 10-17 are tree size
 175   // Bytes 18-49 are sha256 root hash
 176   ASSERT_EQ(50u, encoded.length());
 177   std::string expected_buffer(
 178       "\x0\x1\x0\x0\x1\x45\x3c\x5f\xb8\x35\x0\x0\x0\x0\x0\x0\x0\x15", 18);
 179   expected_buffer.append(ct::GetSampleSTHSHA256RootHash());
 180   ASSERT_EQ(expected_buffer, encoded);
 181 }
 182
 183 }  // namespace net
 184