net/spdy/hpack_input_stream_test.cc

   1 // Copyright 2014 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/spdy/hpack_input_stream.h"
   6
   7 #include <bitset>
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/logging.h"
  12 #include "base/strings/string_piece.h"
  13 #include "net/spdy/hpack_constants.h"
  14 #include "net/spdy/spdy_test_utils.h"
  15 #include "testing/gtest/include/gtest/gtest.h"
  16
  17 namespace net {
  18
  19 namespace {
  20
  21 using base::StringPiece;
  22 using std::string;
  23 using test::a2b_hex;
  24
  25 const size_t kLiteralBound = 1024;
  26
  27 class HpackInputStreamTest : public ::testing::Test {
  28  public:
  29   virtual void SetUp() {
  30     std::vector<HpackHuffmanSymbol> code = HpackHuffmanCode();
  31     EXPECT_TRUE(huffman_table_.Initialize(&code[0], code.size()));
  32   }
  33
  34  protected:
  35   HpackHuffmanTable huffman_table_;
  36 };
  37
  38 // Hex representation of encoded length and Huffman string.
  39 const char kEncodedHuffmanFixture[] = "2d"  // Length prefix.
  40   "94e7821dd7f2e6c7b335dfdfcd5b3960"
  41   "d5af27087f3672c1ab270fb5291f9587"
  42   "316065c003ed4ee5b1063d5007";
  43
  44 const char kDecodedHuffmanFixture[] =
  45   "foo=ASDJKHQKBZXOQWEOPIUAXQWEOIU; max-age=3600; version=1";
  46
  47 // Utility function to decode an assumed-valid uint32 with an N-bit
  48 // prefix.
  49 uint32 DecodeValidUint32(uint8 N, StringPiece str) {
  50   EXPECT_GT(N, 0);
  51   EXPECT_LE(N, 8);
  52   HpackInputStream input_stream(kLiteralBound, str);
  53   input_stream.SetBitOffsetForTest(8 - N);
  54   uint32 I;
  55   EXPECT_TRUE(input_stream.DecodeNextUint32(&I));
  56   return I;
  57 }
  58
  59 // Utility function to decode an assumed-invalid uint32 with an N-bit
  60 // prefix.
  61 void ExpectDecodeUint32Invalid(uint8 N, StringPiece str) {
  62   EXPECT_GT(N, 0);
  63   EXPECT_LE(N, 8);
  64   HpackInputStream input_stream(kLiteralBound, str);
  65   input_stream.SetBitOffsetForTest(8 - N);
  66   uint32 I;
  67   EXPECT_FALSE(input_stream.DecodeNextUint32(&I));
  68 }
  69
  70 uint32 bits32(const string& bitstring) {
  71   return std::bitset<32>(bitstring).to_ulong();
  72 }
  73
  74 // The {Number}ByteIntegersEightBitPrefix tests below test that
  75 // certain integers are decoded correctly with an 8-bit prefix in
  76 // exactly {Number} bytes.
  77
  78 TEST_F(HpackInputStreamTest, OneByteIntegersEightBitPrefix) {
  79   // Minimum.
  80   EXPECT_EQ(0x00u, DecodeValidUint32(8, string("\x00", 1)));
  81   EXPECT_EQ(0x7fu, DecodeValidUint32(8, "\x7f"));
  82   // Maximum.
  83   EXPECT_EQ(0xfeu, DecodeValidUint32(8, "\xfe"));
  84   // Invalid.
  85   ExpectDecodeUint32Invalid(8, "\xff");
  86 }
  87
  88 TEST_F(HpackInputStreamTest, TwoByteIntegersEightBitPrefix) {
  89   // Minimum.
  90   EXPECT_EQ(0xffu, DecodeValidUint32(8, string("\xff\x00", 2)));
  91   EXPECT_EQ(0x0100u, DecodeValidUint32(8, "\xff\x01"));
  92   // Maximum.
  93   EXPECT_EQ(0x017eu, DecodeValidUint32(8, "\xff\x7f"));
  94   // Invalid.
  95   ExpectDecodeUint32Invalid(8, "\xff\x80");
  96   ExpectDecodeUint32Invalid(8, "\xff\xff");
  97 }
  98
  99 TEST_F(HpackInputStreamTest, ThreeByteIntegersEightBitPrefix) {
 100   // Minimum.
 101   EXPECT_EQ(0x017fu, DecodeValidUint32(8, "\xff\x80\x01"));
 102   EXPECT_EQ(0x0fffu, DecodeValidUint32(8, "\xff\x80\x1e"));
 103   // Maximum.
 104   EXPECT_EQ(0x40feu, DecodeValidUint32(8, "\xff\xff\x7f"));
 105   // Invalid.
 106   ExpectDecodeUint32Invalid(8, "\xff\x80\x00");
 107   ExpectDecodeUint32Invalid(8, "\xff\xff\x00");
 108   ExpectDecodeUint32Invalid(8, "\xff\xff\x80");
 109   ExpectDecodeUint32Invalid(8, "\xff\xff\xff");
 110 }
 111
 112 TEST_F(HpackInputStreamTest, FourByteIntegersEightBitPrefix) {
 113   // Minimum.
 114   EXPECT_EQ(0x40ffu, DecodeValidUint32(8, "\xff\x80\x80\x01"));
 115   EXPECT_EQ(0xffffu, DecodeValidUint32(8, "\xff\x80\xfe\x03"));
 116   // Maximum.
 117   EXPECT_EQ(0x002000feu, DecodeValidUint32(8, "\xff\xff\xff\x7f"));
 118   // Invalid.
 119   ExpectDecodeUint32Invalid(8, "\xff\xff\x80\x00");
 120   ExpectDecodeUint32Invalid(8, "\xff\xff\xff\x00");
 121   ExpectDecodeUint32Invalid(8, "\xff\xff\xff\x80");
 122   ExpectDecodeUint32Invalid(8, "\xff\xff\xff\xff");
 123 }
 124
 125 TEST_F(HpackInputStreamTest, FiveByteIntegersEightBitPrefix) {
 126   // Minimum.
 127   EXPECT_EQ(0x002000ffu, DecodeValidUint32(8, "\xff\x80\x80\x80\x01"));
 128   EXPECT_EQ(0x00ffffffu, DecodeValidUint32(8, "\xff\x80\xfe\xff\x07"));
 129   // Maximum.
 130   EXPECT_EQ(0x100000feu, DecodeValidUint32(8, "\xff\xff\xff\xff\x7f"));
 131   // Invalid.
 132   ExpectDecodeUint32Invalid(8, "\xff\xff\xff\x80\x00");
 133   ExpectDecodeUint32Invalid(8, "\xff\xff\xff\xff\x00");
 134   ExpectDecodeUint32Invalid(8, "\xff\xff\xff\xff\x80");
 135   ExpectDecodeUint32Invalid(8, "\xff\xff\xff\xff\xff");
 136 }
 137
 138 TEST_F(HpackInputStreamTest, SixByteIntegersEightBitPrefix) {
 139   // Minimum.
 140   EXPECT_EQ(0x100000ffu, DecodeValidUint32(8, "\xff\x80\x80\x80\x80\x01"));
 141   // Maximum.
 142   EXPECT_EQ(0xffffffffu, DecodeValidUint32(8, "\xff\x80\xfe\xff\xff\x0f"));
 143   // Invalid.
 144   ExpectDecodeUint32Invalid(8, "\xff\x80\x80\x80\x80\x00");
 145   ExpectDecodeUint32Invalid(8, "\xff\x80\xfe\xff\xff\x10");
 146   ExpectDecodeUint32Invalid(8, "\xff\xff\xff\xff\xff\xff");
 147 }
 148
 149 // There are no valid uint32 encodings that are greater than six
 150 // bytes.
 151 TEST_F(HpackInputStreamTest, SevenByteIntegersEightBitPrefix) {
 152   ExpectDecodeUint32Invalid(8, "\xff\x80\x80\x80\x80\x80\x00");
 153   ExpectDecodeUint32Invalid(8, "\xff\x80\x80\x80\x80\x80\x01");
 154   ExpectDecodeUint32Invalid(8, "\xff\xff\xff\xff\xff\xff\xff");
 155 }
 156
 157 // The {Number}ByteIntegersOneToSevenBitPrefix tests below test that
 158 // certain integers are encoded correctly with an N-bit prefix in
 159 // exactly {Number} bytes for N in {1, 2, ..., 7}.
 160
 161 TEST_F(HpackInputStreamTest, OneByteIntegersOneToSevenBitPrefixes) {
 162   // Minimums.
 163   EXPECT_EQ(0x00u, DecodeValidUint32(7, string("\x00", 1)));
 164   EXPECT_EQ(0x00u, DecodeValidUint32(7, string("\x80", 1)));
 165   EXPECT_EQ(0x00u, DecodeValidUint32(6, string("\x00", 1)));
 166   EXPECT_EQ(0x00u, DecodeValidUint32(6, string("\xc0", 1)));
 167   EXPECT_EQ(0x00u, DecodeValidUint32(5, string("\x00", 1)));
 168   EXPECT_EQ(0x00u, DecodeValidUint32(5, string("\xe0", 1)));
 169   EXPECT_EQ(0x00u, DecodeValidUint32(4, string("\x00", 1)));
 170   EXPECT_EQ(0x00u, DecodeValidUint32(4, string("\xf0", 1)));
 171   EXPECT_EQ(0x00u, DecodeValidUint32(3, string("\x00", 1)));
 172   EXPECT_EQ(0x00u, DecodeValidUint32(3, string("\xf8", 1)));
 173   EXPECT_EQ(0x00u, DecodeValidUint32(2, string("\x00", 1)));
 174   EXPECT_EQ(0x00u, DecodeValidUint32(2, string("\xfc", 1)));
 175   EXPECT_EQ(0x00u, DecodeValidUint32(1, string("\x00", 1)));
 176   EXPECT_EQ(0x00u, DecodeValidUint32(1, string("\xfe", 1)));
 177
 178   // Maximums.
 179   EXPECT_EQ(0x7eu, DecodeValidUint32(7, "\x7e"));
 180   EXPECT_EQ(0x7eu, DecodeValidUint32(7, "\xfe"));
 181   EXPECT_EQ(0x3eu, DecodeValidUint32(6, "\x3e"));
 182   EXPECT_EQ(0x3eu, DecodeValidUint32(6, "\xfe"));
 183   EXPECT_EQ(0x1eu, DecodeValidUint32(5, "\x1e"));
 184   EXPECT_EQ(0x1eu, DecodeValidUint32(5, "\xfe"));
 185   EXPECT_EQ(0x0eu, DecodeValidUint32(4, "\x0e"));
 186   EXPECT_EQ(0x0eu, DecodeValidUint32(4, "\xfe"));
 187   EXPECT_EQ(0x06u, DecodeValidUint32(3, "\x06"));
 188   EXPECT_EQ(0x06u, DecodeValidUint32(3, "\xfe"));
 189   EXPECT_EQ(0x02u, DecodeValidUint32(2, "\x02"));
 190   EXPECT_EQ(0x02u, DecodeValidUint32(2, "\xfe"));
 191   EXPECT_EQ(0x00u, DecodeValidUint32(1, string("\x00", 1)));
 192   EXPECT_EQ(0x00u, DecodeValidUint32(1, string("\xfe", 1)));
 193
 194   // Invalid.
 195   ExpectDecodeUint32Invalid(7, "\x7f");
 196   ExpectDecodeUint32Invalid(7, "\xff");
 197   ExpectDecodeUint32Invalid(6, "\x3f");
 198   ExpectDecodeUint32Invalid(6, "\xff");
 199   ExpectDecodeUint32Invalid(5, "\x1f");
 200   ExpectDecodeUint32Invalid(5, "\xff");
 201   ExpectDecodeUint32Invalid(4, "\x0f");
 202   ExpectDecodeUint32Invalid(4, "\xff");
 203   ExpectDecodeUint32Invalid(3, "\x07");
 204   ExpectDecodeUint32Invalid(3, "\xff");
 205   ExpectDecodeUint32Invalid(2, "\x03");
 206   ExpectDecodeUint32Invalid(2, "\xff");
 207   ExpectDecodeUint32Invalid(1, "\x01");
 208   ExpectDecodeUint32Invalid(1, "\xff");
 209 }
 210
 211 TEST_F(HpackInputStreamTest, TwoByteIntegersOneToSevenBitPrefixes) {
 212   // Minimums.
 213   EXPECT_EQ(0x7fu, DecodeValidUint32(7, string("\x7f\x00", 2)));
 214   EXPECT_EQ(0x7fu, DecodeValidUint32(7, string("\xff\x00", 2)));
 215   EXPECT_EQ(0x3fu, DecodeValidUint32(6, string("\x3f\x00", 2)));
 216   EXPECT_EQ(0x3fu, DecodeValidUint32(6, string("\xff\x00", 2)));
 217   EXPECT_EQ(0x1fu, DecodeValidUint32(5, string("\x1f\x00", 2)));
 218   EXPECT_EQ(0x1fu, DecodeValidUint32(5, string("\xff\x00", 2)));
 219   EXPECT_EQ(0x0fu, DecodeValidUint32(4, string("\x0f\x00", 2)));
 220   EXPECT_EQ(0x0fu, DecodeValidUint32(4, string("\xff\x00", 2)));
 221   EXPECT_EQ(0x07u, DecodeValidUint32(3, string("\x07\x00", 2)));
 222   EXPECT_EQ(0x07u, DecodeValidUint32(3, string("\xff\x00", 2)));
 223   EXPECT_EQ(0x03u, DecodeValidUint32(2, string("\x03\x00", 2)));
 224   EXPECT_EQ(0x03u, DecodeValidUint32(2, string("\xff\x00", 2)));
 225   EXPECT_EQ(0x01u, DecodeValidUint32(1, string("\x01\x00", 2)));
 226   EXPECT_EQ(0x01u, DecodeValidUint32(1, string("\xff\x00", 2)));
 227
 228   // Maximums.
 229   EXPECT_EQ(0xfeu, DecodeValidUint32(7, "\x7f\x7f"));
 230   EXPECT_EQ(0xfeu, DecodeValidUint32(7, "\xff\x7f"));
 231   EXPECT_EQ(0xbeu, DecodeValidUint32(6, "\x3f\x7f"));
 232   EXPECT_EQ(0xbeu, DecodeValidUint32(6, "\xff\x7f"));
 233   EXPECT_EQ(0x9eu, DecodeValidUint32(5, "\x1f\x7f"));
 234   EXPECT_EQ(0x9eu, DecodeValidUint32(5, "\xff\x7f"));
 235   EXPECT_EQ(0x8eu, DecodeValidUint32(4, "\x0f\x7f"));
 236   EXPECT_EQ(0x8eu, DecodeValidUint32(4, "\xff\x7f"));
 237   EXPECT_EQ(0x86u, DecodeValidUint32(3, "\x07\x7f"));
 238   EXPECT_EQ(0x86u, DecodeValidUint32(3, "\xff\x7f"));
 239   EXPECT_EQ(0x82u, DecodeValidUint32(2, "\x03\x7f"));
 240   EXPECT_EQ(0x82u, DecodeValidUint32(2, "\xff\x7f"));
 241   EXPECT_EQ(0x80u, DecodeValidUint32(1, "\x01\x7f"));
 242   EXPECT_EQ(0x80u, DecodeValidUint32(1, "\xff\x7f"));
 243
 244   // Invalid.
 245   ExpectDecodeUint32Invalid(7, "\x7f\x80");
 246   ExpectDecodeUint32Invalid(7, "\xff\xff");
 247   ExpectDecodeUint32Invalid(6, "\x3f\x80");
 248   ExpectDecodeUint32Invalid(6, "\xff\xff");
 249   ExpectDecodeUint32Invalid(5, "\x1f\x80");
 250   ExpectDecodeUint32Invalid(5, "\xff\xff");
 251   ExpectDecodeUint32Invalid(4, "\x0f\x80");
 252   ExpectDecodeUint32Invalid(4, "\xff\xff");
 253   ExpectDecodeUint32Invalid(3, "\x07\x80");
 254   ExpectDecodeUint32Invalid(3, "\xff\xff");
 255   ExpectDecodeUint32Invalid(2, "\x03\x80");
 256   ExpectDecodeUint32Invalid(2, "\xff\xff");
 257   ExpectDecodeUint32Invalid(1, "\x01\x80");
 258   ExpectDecodeUint32Invalid(1, "\xff\xff");
 259 }
 260
 261 TEST_F(HpackInputStreamTest, ThreeByteIntegersOneToSevenBitPrefixes) {
 262   // Minimums.
 263   EXPECT_EQ(0xffu, DecodeValidUint32(7, "\x7f\x80\x01"));
 264   EXPECT_EQ(0xffu, DecodeValidUint32(7, "\xff\x80\x01"));
 265   EXPECT_EQ(0xbfu, DecodeValidUint32(6, "\x3f\x80\x01"));
 266   EXPECT_EQ(0xbfu, DecodeValidUint32(6, "\xff\x80\x01"));
 267   EXPECT_EQ(0x9fu, DecodeValidUint32(5, "\x1f\x80\x01"));
 268   EXPECT_EQ(0x9fu, DecodeValidUint32(5, "\xff\x80\x01"));
 269   EXPECT_EQ(0x8fu, DecodeValidUint32(4, "\x0f\x80\x01"));
 270   EXPECT_EQ(0x8fu, DecodeValidUint32(4, "\xff\x80\x01"));
 271   EXPECT_EQ(0x87u, DecodeValidUint32(3, "\x07\x80\x01"));
 272   EXPECT_EQ(0x87u, DecodeValidUint32(3, "\xff\x80\x01"));
 273   EXPECT_EQ(0x83u, DecodeValidUint32(2, "\x03\x80\x01"));
 274   EXPECT_EQ(0x83u, DecodeValidUint32(2, "\xff\x80\x01"));
 275   EXPECT_EQ(0x81u, DecodeValidUint32(1, "\x01\x80\x01"));
 276   EXPECT_EQ(0x81u, DecodeValidUint32(1, "\xff\x80\x01"));
 277
 278   // Maximums.
 279   EXPECT_EQ(0x407eu, DecodeValidUint32(7, "\x7f\xff\x7f"));
 280   EXPECT_EQ(0x407eu, DecodeValidUint32(7, "\xff\xff\x7f"));
 281   EXPECT_EQ(0x403eu, DecodeValidUint32(6, "\x3f\xff\x7f"));
 282   EXPECT_EQ(0x403eu, DecodeValidUint32(6, "\xff\xff\x7f"));
 283   EXPECT_EQ(0x401eu, DecodeValidUint32(5, "\x1f\xff\x7f"));
 284   EXPECT_EQ(0x401eu, DecodeValidUint32(5, "\xff\xff\x7f"));
 285   EXPECT_EQ(0x400eu, DecodeValidUint32(4, "\x0f\xff\x7f"));
 286   EXPECT_EQ(0x400eu, DecodeValidUint32(4, "\xff\xff\x7f"));
 287   EXPECT_EQ(0x4006u, DecodeValidUint32(3, "\x07\xff\x7f"));
 288   EXPECT_EQ(0x4006u, DecodeValidUint32(3, "\xff\xff\x7f"));
 289   EXPECT_EQ(0x4002u, DecodeValidUint32(2, "\x03\xff\x7f"));
 290   EXPECT_EQ(0x4002u, DecodeValidUint32(2, "\xff\xff\x7f"));
 291   EXPECT_EQ(0x4000u, DecodeValidUint32(1, "\x01\xff\x7f"));
 292   EXPECT_EQ(0x4000u, DecodeValidUint32(1, "\xff\xff\x7f"));
 293
 294   // Invalid.
 295   ExpectDecodeUint32Invalid(7, "\x7f\xff\x80");
 296   ExpectDecodeUint32Invalid(7, "\xff\xff\xff");
 297   ExpectDecodeUint32Invalid(6, "\x3f\xff\x80");
 298   ExpectDecodeUint32Invalid(6, "\xff\xff\xff");
 299   ExpectDecodeUint32Invalid(5, "\x1f\xff\x80");
 300   ExpectDecodeUint32Invalid(5, "\xff\xff\xff");
 301   ExpectDecodeUint32Invalid(4, "\x0f\xff\x80");
 302   ExpectDecodeUint32Invalid(4, "\xff\xff\xff");
 303   ExpectDecodeUint32Invalid(3, "\x07\xff\x80");
 304   ExpectDecodeUint32Invalid(3, "\xff\xff\xff");
 305   ExpectDecodeUint32Invalid(2, "\x03\xff\x80");
 306   ExpectDecodeUint32Invalid(2, "\xff\xff\xff");
 307   ExpectDecodeUint32Invalid(1, "\x01\xff\x80");
 308   ExpectDecodeUint32Invalid(1, "\xff\xff\xff");
 309 }
 310
 311 TEST_F(HpackInputStreamTest, FourByteIntegersOneToSevenBitPrefixes) {
 312   // Minimums.
 313   EXPECT_EQ(0x407fu, DecodeValidUint32(7, "\x7f\x80\x80\x01"));
 314   EXPECT_EQ(0x407fu, DecodeValidUint32(7, "\xff\x80\x80\x01"));
 315   EXPECT_EQ(0x403fu, DecodeValidUint32(6, "\x3f\x80\x80\x01"));
 316   EXPECT_EQ(0x403fu, DecodeValidUint32(6, "\xff\x80\x80\x01"));
 317   EXPECT_EQ(0x401fu, DecodeValidUint32(5, "\x1f\x80\x80\x01"));
 318   EXPECT_EQ(0x401fu, DecodeValidUint32(5, "\xff\x80\x80\x01"));
 319   EXPECT_EQ(0x400fu, DecodeValidUint32(4, "\x0f\x80\x80\x01"));
 320   EXPECT_EQ(0x400fu, DecodeValidUint32(4, "\xff\x80\x80\x01"));
 321   EXPECT_EQ(0x4007u, DecodeValidUint32(3, "\x07\x80\x80\x01"));
 322   EXPECT_EQ(0x4007u, DecodeValidUint32(3, "\xff\x80\x80\x01"));
 323   EXPECT_EQ(0x4003u, DecodeValidUint32(2, "\x03\x80\x80\x01"));
 324   EXPECT_EQ(0x4003u, DecodeValidUint32(2, "\xff\x80\x80\x01"));
 325   EXPECT_EQ(0x4001u, DecodeValidUint32(1, "\x01\x80\x80\x01"));
 326   EXPECT_EQ(0x4001u, DecodeValidUint32(1, "\xff\x80\x80\x01"));
 327
 328   // Maximums.
 329   EXPECT_EQ(0x20007eu, DecodeValidUint32(7, "\x7f\xff\xff\x7f"));
 330   EXPECT_EQ(0x20007eu, DecodeValidUint32(7, "\xff\xff\xff\x7f"));
 331   EXPECT_EQ(0x20003eu, DecodeValidUint32(6, "\x3f\xff\xff\x7f"));
 332   EXPECT_EQ(0x20003eu, DecodeValidUint32(6, "\xff\xff\xff\x7f"));
 333   EXPECT_EQ(0x20001eu, DecodeValidUint32(5, "\x1f\xff\xff\x7f"));
 334   EXPECT_EQ(0x20001eu, DecodeValidUint32(5, "\xff\xff\xff\x7f"));
 335   EXPECT_EQ(0x20000eu, DecodeValidUint32(4, "\x0f\xff\xff\x7f"));
 336   EXPECT_EQ(0x20000eu, DecodeValidUint32(4, "\xff\xff\xff\x7f"));
 337   EXPECT_EQ(0x200006u, DecodeValidUint32(3, "\x07\xff\xff\x7f"));
 338   EXPECT_EQ(0x200006u, DecodeValidUint32(3, "\xff\xff\xff\x7f"));
 339   EXPECT_EQ(0x200002u, DecodeValidUint32(2, "\x03\xff\xff\x7f"));
 340   EXPECT_EQ(0x200002u, DecodeValidUint32(2, "\xff\xff\xff\x7f"));
 341   EXPECT_EQ(0x200000u, DecodeValidUint32(1, "\x01\xff\xff\x7f"));
 342   EXPECT_EQ(0x200000u, DecodeValidUint32(1, "\xff\xff\xff\x7f"));
 343
 344   // Invalid.
 345   ExpectDecodeUint32Invalid(7, "\x7f\xff\xff\x80");
 346   ExpectDecodeUint32Invalid(7, "\xff\xff\xff\xff");
 347   ExpectDecodeUint32Invalid(6, "\x3f\xff\xff\x80");
 348   ExpectDecodeUint32Invalid(6, "\xff\xff\xff\xff");
 349   ExpectDecodeUint32Invalid(5, "\x1f\xff\xff\x80");
 350   ExpectDecodeUint32Invalid(5, "\xff\xff\xff\xff");
 351   ExpectDecodeUint32Invalid(4, "\x0f\xff\xff\x80");
 352   ExpectDecodeUint32Invalid(4, "\xff\xff\xff\xff");
 353   ExpectDecodeUint32Invalid(3, "\x07\xff\xff\x80");
 354   ExpectDecodeUint32Invalid(3, "\xff\xff\xff\xff");
 355   ExpectDecodeUint32Invalid(2, "\x03\xff\xff\x80");
 356   ExpectDecodeUint32Invalid(2, "\xff\xff\xff\xff");
 357   ExpectDecodeUint32Invalid(1, "\x01\xff\xff\x80");
 358   ExpectDecodeUint32Invalid(1, "\xff\xff\xff\xff");
 359 }
 360
 361 TEST_F(HpackInputStreamTest, FiveByteIntegersOneToSevenBitPrefixes) {
 362   // Minimums.
 363   EXPECT_EQ(0x20007fu, DecodeValidUint32(7, "\x7f\x80\x80\x80\x01"));
 364   EXPECT_EQ(0x20007fu, DecodeValidUint32(7, "\xff\x80\x80\x80\x01"));
 365   EXPECT_EQ(0x20003fu, DecodeValidUint32(6, "\x3f\x80\x80\x80\x01"));
 366   EXPECT_EQ(0x20003fu, DecodeValidUint32(6, "\xff\x80\x80\x80\x01"));
 367   EXPECT_EQ(0x20001fu, DecodeValidUint32(5, "\x1f\x80\x80\x80\x01"));
 368   EXPECT_EQ(0x20001fu, DecodeValidUint32(5, "\xff\x80\x80\x80\x01"));
 369   EXPECT_EQ(0x20000fu, DecodeValidUint32(4, "\x0f\x80\x80\x80\x01"));
 370   EXPECT_EQ(0x20000fu, DecodeValidUint32(4, "\xff\x80\x80\x80\x01"));
 371   EXPECT_EQ(0x200007u, DecodeValidUint32(3, "\x07\x80\x80\x80\x01"));
 372   EXPECT_EQ(0x200007u, DecodeValidUint32(3, "\xff\x80\x80\x80\x01"));
 373   EXPECT_EQ(0x200003u, DecodeValidUint32(2, "\x03\x80\x80\x80\x01"));
 374   EXPECT_EQ(0x200003u, DecodeValidUint32(2, "\xff\x80\x80\x80\x01"));
 375   EXPECT_EQ(0x200001u, DecodeValidUint32(1, "\x01\x80\x80\x80\x01"));
 376   EXPECT_EQ(0x200001u, DecodeValidUint32(1, "\xff\x80\x80\x80\x01"));
 377
 378   // Maximums.
 379   EXPECT_EQ(0x1000007eu, DecodeValidUint32(7, "\x7f\xff\xff\xff\x7f"));
 380   EXPECT_EQ(0x1000007eu, DecodeValidUint32(7, "\xff\xff\xff\xff\x7f"));
 381   EXPECT_EQ(0x1000003eu, DecodeValidUint32(6, "\x3f\xff\xff\xff\x7f"));
 382   EXPECT_EQ(0x1000003eu, DecodeValidUint32(6, "\xff\xff\xff\xff\x7f"));
 383   EXPECT_EQ(0x1000001eu, DecodeValidUint32(5, "\x1f\xff\xff\xff\x7f"));
 384   EXPECT_EQ(0x1000001eu, DecodeValidUint32(5, "\xff\xff\xff\xff\x7f"));
 385   EXPECT_EQ(0x1000000eu, DecodeValidUint32(4, "\x0f\xff\xff\xff\x7f"));
 386   EXPECT_EQ(0x1000000eu, DecodeValidUint32(4, "\xff\xff\xff\xff\x7f"));
 387   EXPECT_EQ(0x10000006u, DecodeValidUint32(3, "\x07\xff\xff\xff\x7f"));
 388   EXPECT_EQ(0x10000006u, DecodeValidUint32(3, "\xff\xff\xff\xff\x7f"));
 389   EXPECT_EQ(0x10000002u, DecodeValidUint32(2, "\x03\xff\xff\xff\x7f"));
 390   EXPECT_EQ(0x10000002u, DecodeValidUint32(2, "\xff\xff\xff\xff\x7f"));
 391   EXPECT_EQ(0x10000000u, DecodeValidUint32(1, "\x01\xff\xff\xff\x7f"));
 392   EXPECT_EQ(0x10000000u, DecodeValidUint32(1, "\xff\xff\xff\xff\x7f"));
 393
 394   // Invalid.
 395   ExpectDecodeUint32Invalid(7, "\x7f\xff\xff\xff\x80");
 396   ExpectDecodeUint32Invalid(7, "\xff\xff\xff\xff\xff");
 397   ExpectDecodeUint32Invalid(6, "\x3f\xff\xff\xff\x80");
 398   ExpectDecodeUint32Invalid(6, "\xff\xff\xff\xff\xff");
 399   ExpectDecodeUint32Invalid(5, "\x1f\xff\xff\xff\x80");
 400   ExpectDecodeUint32Invalid(5, "\xff\xff\xff\xff\xff");
 401   ExpectDecodeUint32Invalid(4, "\x0f\xff\xff\xff\x80");
 402   ExpectDecodeUint32Invalid(4, "\xff\xff\xff\xff\xff");
 403   ExpectDecodeUint32Invalid(3, "\x07\xff\xff\xff\x80");
 404   ExpectDecodeUint32Invalid(3, "\xff\xff\xff\xff\xff");
 405   ExpectDecodeUint32Invalid(2, "\x03\xff\xff\xff\x80");
 406   ExpectDecodeUint32Invalid(2, "\xff\xff\xff\xff\xff");
 407   ExpectDecodeUint32Invalid(1, "\x01\xff\xff\xff\x80");
 408   ExpectDecodeUint32Invalid(1, "\xff\xff\xff\xff\xff");
 409 }
 410
 411 TEST_F(HpackInputStreamTest, SixByteIntegersOneToSevenBitPrefixes) {
 412   // Minimums.
 413   EXPECT_EQ(0x1000007fu, DecodeValidUint32(7, "\x7f\x80\x80\x80\x80\x01"));
 414   EXPECT_EQ(0x1000007fu, DecodeValidUint32(7, "\xff\x80\x80\x80\x80\x01"));
 415   EXPECT_EQ(0x1000003fu, DecodeValidUint32(6, "\x3f\x80\x80\x80\x80\x01"));
 416   EXPECT_EQ(0x1000003fu, DecodeValidUint32(6, "\xff\x80\x80\x80\x80\x01"));
 417   EXPECT_EQ(0x1000001fu, DecodeValidUint32(5, "\x1f\x80\x80\x80\x80\x01"));
 418   EXPECT_EQ(0x1000001fu, DecodeValidUint32(5, "\xff\x80\x80\x80\x80\x01"));
 419   EXPECT_EQ(0x1000000fu, DecodeValidUint32(4, "\x0f\x80\x80\x80\x80\x01"));
 420   EXPECT_EQ(0x1000000fu, DecodeValidUint32(4, "\xff\x80\x80\x80\x80\x01"));
 421   EXPECT_EQ(0x10000007u, DecodeValidUint32(3, "\x07\x80\x80\x80\x80\x01"));
 422   EXPECT_EQ(0x10000007u, DecodeValidUint32(3, "\xff\x80\x80\x80\x80\x01"));
 423   EXPECT_EQ(0x10000003u, DecodeValidUint32(2, "\x03\x80\x80\x80\x80\x01"));
 424   EXPECT_EQ(0x10000003u, DecodeValidUint32(2, "\xff\x80\x80\x80\x80\x01"));
 425   EXPECT_EQ(0x10000001u, DecodeValidUint32(1, "\x01\x80\x80\x80\x80\x01"));
 426   EXPECT_EQ(0x10000001u, DecodeValidUint32(1, "\xff\x80\x80\x80\x80\x01"));
 427
 428   // Maximums.
 429   EXPECT_EQ(0xffffffffu, DecodeValidUint32(7, "\x7f\x80\xff\xff\xff\x0f"));
 430   EXPECT_EQ(0xffffffffu, DecodeValidUint32(7, "\xff\x80\xff\xff\xff\x0f"));
 431   EXPECT_EQ(0xffffffffu, DecodeValidUint32(6, "\x3f\xc0\xff\xff\xff\x0f"));
 432   EXPECT_EQ(0xffffffffu, DecodeValidUint32(6, "\xff\xc0\xff\xff\xff\x0f"));
 433   EXPECT_EQ(0xffffffffu, DecodeValidUint32(5, "\x1f\xe0\xff\xff\xff\x0f"));
 434   EXPECT_EQ(0xffffffffu, DecodeValidUint32(5, "\xff\xe0\xff\xff\xff\x0f"));
 435   EXPECT_EQ(0xffffffffu, DecodeValidUint32(4, "\x0f\xf0\xff\xff\xff\x0f"));
 436   EXPECT_EQ(0xffffffffu, DecodeValidUint32(4, "\xff\xf0\xff\xff\xff\x0f"));
 437   EXPECT_EQ(0xffffffffu, DecodeValidUint32(3, "\x07\xf8\xff\xff\xff\x0f"));
 438   EXPECT_EQ(0xffffffffu, DecodeValidUint32(3, "\xff\xf8\xff\xff\xff\x0f"));
 439   EXPECT_EQ(0xffffffffu, DecodeValidUint32(2, "\x03\xfc\xff\xff\xff\x0f"));
 440   EXPECT_EQ(0xffffffffu, DecodeValidUint32(2, "\xff\xfc\xff\xff\xff\x0f"));
 441   EXPECT_EQ(0xffffffffu, DecodeValidUint32(1, "\x01\xfe\xff\xff\xff\x0f"));
 442   EXPECT_EQ(0xffffffffu, DecodeValidUint32(1, "\xff\xfe\xff\xff\xff\x0f"));
 443
 444   // Invalid.
 445   ExpectDecodeUint32Invalid(7, "\x7f\x80\xff\xff\xff\x10");
 446   ExpectDecodeUint32Invalid(7, "\xff\x80\xff\xff\xff\xff");
 447   ExpectDecodeUint32Invalid(6, "\x3f\xc0\xff\xff\xff\x10");
 448   ExpectDecodeUint32Invalid(6, "\xff\xc0\xff\xff\xff\xff");
 449   ExpectDecodeUint32Invalid(5, "\x1f\xe0\xff\xff\xff\x10");
 450   ExpectDecodeUint32Invalid(5, "\xff\xe0\xff\xff\xff\xff");
 451   ExpectDecodeUint32Invalid(4, "\x0f\xf0\xff\xff\xff\x10");
 452   ExpectDecodeUint32Invalid(4, "\xff\xf0\xff\xff\xff\xff");
 453   ExpectDecodeUint32Invalid(3, "\x07\xf8\xff\xff\xff\x10");
 454   ExpectDecodeUint32Invalid(3, "\xff\xf8\xff\xff\xff\xff");
 455   ExpectDecodeUint32Invalid(2, "\x03\xfc\xff\xff\xff\x10");
 456   ExpectDecodeUint32Invalid(2, "\xff\xfc\xff\xff\xff\xff");
 457   ExpectDecodeUint32Invalid(1, "\x01\xfe\xff\xff\xff\x10");
 458   ExpectDecodeUint32Invalid(1, "\xff\xfe\xff\xff\xff\xff");
 459 }
 460
 461 // There are no valid uint32 encodings that are greater than six
 462 // bytes.
 463 TEST_F(HpackInputStreamTest, SevenByteIntegersOneToSevenBitPrefixes) {
 464   ExpectDecodeUint32Invalid(7, "\x7f\x80\x80\x80\x80\x80\x00");
 465   ExpectDecodeUint32Invalid(7, "\x7f\x80\x80\x80\x80\x80\x01");
 466   ExpectDecodeUint32Invalid(7, "\xff\xff\xff\xff\xff\xff\xff");
 467   ExpectDecodeUint32Invalid(6, "\x3f\x80\x80\x80\x80\x80\x00");
 468   ExpectDecodeUint32Invalid(6, "\x3f\x80\x80\x80\x80\x80\x01");
 469   ExpectDecodeUint32Invalid(6, "\xff\xff\xff\xff\xff\xff\xff");
 470   ExpectDecodeUint32Invalid(5, "\x1f\x80\x80\x80\x80\x80\x00");
 471   ExpectDecodeUint32Invalid(5, "\x1f\x80\x80\x80\x80\x80\x01");
 472   ExpectDecodeUint32Invalid(5, "\xff\xff\xff\xff\xff\xff\xff");
 473   ExpectDecodeUint32Invalid(4, "\x0f\x80\x80\x80\x80\x80\x00");
 474   ExpectDecodeUint32Invalid(4, "\x0f\x80\x80\x80\x80\x80\x01");
 475   ExpectDecodeUint32Invalid(4, "\xff\xff\xff\xff\xff\xff\xff");
 476   ExpectDecodeUint32Invalid(3, "\x07\x80\x80\x80\x80\x80\x00");
 477   ExpectDecodeUint32Invalid(3, "\x07\x80\x80\x80\x80\x80\x01");
 478   ExpectDecodeUint32Invalid(3, "\xff\xff\xff\xff\xff\xff\xff");
 479   ExpectDecodeUint32Invalid(2, "\x03\x80\x80\x80\x80\x80\x00");
 480   ExpectDecodeUint32Invalid(2, "\x03\x80\x80\x80\x80\x80\x01");
 481   ExpectDecodeUint32Invalid(2, "\xff\xff\xff\xff\xff\xff\xff");
 482   ExpectDecodeUint32Invalid(1, "\x01\x80\x80\x80\x80\x80\x00");
 483   ExpectDecodeUint32Invalid(1, "\x01\x80\x80\x80\x80\x80\x01");
 484   ExpectDecodeUint32Invalid(1, "\xff\xff\xff\xff\xff\xff\xff");
 485 }
 486
 487 // Decoding a valid encoded string literal should work.
 488 TEST_F(HpackInputStreamTest, DecodeNextIdentityString) {
 489   HpackInputStream input_stream(kLiteralBound, "\x0estring literal");
 490
 491   EXPECT_TRUE(input_stream.HasMoreData());
 492   StringPiece string_piece;
 493   EXPECT_TRUE(input_stream.DecodeNextIdentityString(&string_piece));
 494   EXPECT_EQ("string literal", string_piece);
 495   EXPECT_FALSE(input_stream.HasMoreData());
 496 }
 497
 498 // Decoding an encoded string literal with size larger than
 499 // |max_string_literal_size_| should fail.
 500 TEST_F(HpackInputStreamTest, DecodeNextIdentityStringSizeLimit) {
 501   HpackInputStream input_stream(13, "\x0estring literal");
 502
 503   EXPECT_TRUE(input_stream.HasMoreData());
 504   StringPiece string_piece;
 505   EXPECT_FALSE(input_stream.DecodeNextIdentityString(&string_piece));
 506 }
 507
 508 // Decoding an encoded string literal with size larger than the
 509 // remainder of the buffer should fail.
 510 TEST_F(HpackInputStreamTest, DecodeNextIdentityStringNotEnoughInput) {
 511   // Set the length to be one more than it should be.
 512   HpackInputStream input_stream(kLiteralBound, "\x0fstring literal");
 513
 514   EXPECT_TRUE(input_stream.HasMoreData());
 515   StringPiece string_piece;
 516   EXPECT_FALSE(input_stream.DecodeNextIdentityString(&string_piece));
 517 }
 518
 519 TEST_F(HpackInputStreamTest, DecodeNextHuffmanString) {
 520   string output, input(a2b_hex(kEncodedHuffmanFixture));
 521   HpackInputStream input_stream(arraysize(kDecodedHuffmanFixture)-1, input);
 522
 523   EXPECT_TRUE(input_stream.HasMoreData());
 524   EXPECT_TRUE(input_stream.DecodeNextHuffmanString(huffman_table_, &output));
 525   EXPECT_EQ(kDecodedHuffmanFixture, output);
 526   EXPECT_FALSE(input_stream.HasMoreData());
 527 }
 528
 529 TEST_F(HpackInputStreamTest, DecodeNextHuffmanStringSizeLimit) {
 530   string output, input(a2b_hex(kEncodedHuffmanFixture));
 531   // Max string literal is one byte shorter than the decoded fixture.
 532   HpackInputStream input_stream(arraysize(kDecodedHuffmanFixture)-2, input);
 533
 534   // Decoded string overflows the max string literal.
 535   EXPECT_TRUE(input_stream.HasMoreData());
 536   EXPECT_FALSE(input_stream.DecodeNextHuffmanString(huffman_table_, &output));
 537 }
 538
 539 TEST_F(HpackInputStreamTest, DecodeNextHuffmanStringNotEnoughInput) {
 540   string output, input(a2b_hex(kEncodedHuffmanFixture));
 541   input[0]++;  // Input prefix is one byte larger than available input.
 542   HpackInputStream input_stream(arraysize(kDecodedHuffmanFixture)-1, input);
 543
 544   // Not enough buffer for declared encoded length.
 545   EXPECT_TRUE(input_stream.HasMoreData());
 546   EXPECT_FALSE(input_stream.DecodeNextHuffmanString(huffman_table_, &output));
 547 }
 548
 549 TEST_F(HpackInputStreamTest, PeekBitsAndConsume) {
 550   HpackInputStream input_stream(kLiteralBound, "\xad\xab\xad\xab\xad");
 551
 552   uint32 bits = 0;
 553   size_t peeked_count = 0;
 554
 555   // Read 0xad.
 556   EXPECT_TRUE(input_stream.PeekBits(&peeked_count, &bits));
 557   EXPECT_EQ(bits32("10101101000000000000000000000000"), bits);
 558   EXPECT_EQ(8u, peeked_count);
 559
 560   // Read 0xab.
 561   EXPECT_TRUE(input_stream.PeekBits(&peeked_count, &bits));
 562   EXPECT_EQ(bits32("10101101101010110000000000000000"), bits);
 563   EXPECT_EQ(16u, peeked_count);
 564
 565   input_stream.ConsumeBits(5);
 566   bits = bits << 5;
 567   peeked_count -= 5;
 568   EXPECT_EQ(bits32("10110101011000000000000000000000"), bits);
 569   EXPECT_EQ(11u, peeked_count);
 570
 571   // Read 0xad.
 572   EXPECT_TRUE(input_stream.PeekBits(&peeked_count, &bits));
 573   EXPECT_EQ(bits32("10110101011101011010000000000000"), bits);
 574   EXPECT_EQ(19u, peeked_count);
 575
 576   // Read 0xab.
 577   EXPECT_TRUE(input_stream.PeekBits(&peeked_count, &bits));
 578   EXPECT_EQ(bits32("10110101011101011011010101100000"), bits);
 579   EXPECT_EQ(27u, peeked_count);
 580
 581   // Read 0xa, and 1 bit of 0xd
 582   EXPECT_TRUE(input_stream.PeekBits(&peeked_count, &bits));
 583   EXPECT_EQ(bits32("10110101011101011011010101110101"), bits);
 584   EXPECT_EQ(32u, peeked_count);
 585
 586   // |bits| is full, and doesn't change.
 587   EXPECT_FALSE(input_stream.PeekBits(&peeked_count, &bits));
 588   EXPECT_EQ(bits32("10110101011101011011010101110101"), bits);
 589   EXPECT_EQ(32u, peeked_count);
 590
 591   input_stream.ConsumeBits(27);
 592   bits = bits << 27;
 593   peeked_count -= 27;
 594   EXPECT_EQ(bits32("10101000000000000000000000000000"), bits);
 595   EXPECT_EQ(5u, peeked_count);
 596
 597   // Read remaining 3 bits of 0xd.
 598   EXPECT_TRUE(input_stream.PeekBits(&peeked_count, &bits));
 599   EXPECT_EQ(bits32("10101101000000000000000000000000"), bits);
 600   EXPECT_EQ(8u, peeked_count);
 601
 602   // EOF.
 603   EXPECT_FALSE(input_stream.PeekBits(&peeked_count, &bits));
 604   EXPECT_EQ(bits32("10101101000000000000000000000000"), bits);
 605   EXPECT_EQ(8u, peeked_count);
 606
 607   input_stream.ConsumeBits(8);
 608   EXPECT_FALSE(input_stream.HasMoreData());
 609 }
 610
 611 TEST_F(HpackInputStreamTest, ConsumeByteRemainder) {
 612   HpackInputStream input_stream(kLiteralBound, "\xad\xab");
 613   // Does nothing.
 614   input_stream.ConsumeByteRemainder();
 615
 616   // Consumes one byte.
 617   input_stream.ConsumeBits(3);
 618   input_stream.ConsumeByteRemainder();
 619   EXPECT_TRUE(input_stream.HasMoreData());
 620
 621   input_stream.ConsumeBits(6);
 622   EXPECT_TRUE(input_stream.HasMoreData());
 623   input_stream.ConsumeByteRemainder();
 624   EXPECT_FALSE(input_stream.HasMoreData());
 625 }
 626
 627 }  // namespace
 628
 629 }  // namespace net