Add Aes128GcmEncrypter and Aes128GcmDecrypter

net/quic/crypto/aes_128_gcm_encrypter_test.cc

+// Copyright (c) 2013 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/quic/crypto/aes_128_gcm_encrypter.h"
+
+#include "net/quic/test_tools/quic_test_utils.h"
+
+using base::StringPiece;
+
+namespace {
+
+// The AES GCM test vectors come from the file gcmEncryptExtIV128.rsp
+// downloaded from http://csrc.nist.gov/groups/STM/cavp/index.html on
+// 2013-02-01. The test vectors in that file look like this:
+//
+// [Keylen = 128]
+// [IVlen = 96]
+// [PTlen = 0]
+// [AADlen = 0]
+// [Taglen = 128]
+//
+// Count = 0
+// Key = 11754cd72aec309bf52f7687212e8957
+// IV = 3c819d9a9bed087615030b65
+// PT =
+// AAD =
+// CT =
+// Tag = 250327c674aaf477aef2675748cf6971
+//
+// Count = 1
+// Key = ca47248ac0b6f8372a97ac43508308ed
+// IV = ffd2b598feabc9019262d2be
+// PT =
+// AAD =
+// CT =
+// Tag = 60d20404af527d248d893ae495707d1a
+//
+// ...
+//
+// The gcmEncryptExtIV128.rsp file is huge (2.8 MB), so I selected just a
+// few test vectors for this unit test.
+
+// Describes a group of test vectors that all have a given key length, IV
+// length, plaintext length, AAD length, and tag length.
+struct TestGroupInfo {
+  size_t key_len;
+  size_t iv_len;
+  size_t pt_len;
+  size_t aad_len;
+  size_t tag_len;
+};
+
+// Each test vector consists of six strings of lowercase hexadecimal digits.
+// The strings may be empty (zero length). A test vector with a NULL |key|
+// marks the end of an array of test vectors.
+struct TestVector {
+  const char* key;
+  const char* iv;
+  const char* pt;
+  const char* aad;
+  const char* ct;
+  const char* tag;
+};
+
+const TestGroupInfo test_group_info[] = {
+  { 128, 96, 0, 0, 128 },
+  { 128, 96, 0, 128, 128 },
+  { 128, 96, 128, 0, 128 },
+  { 128, 96, 408, 160, 128 },
+  { 128, 96, 408, 720, 128 },
+  { 128, 96, 104, 0, 128 },
+};
+
+const TestVector test_group_0[] = {
+  { "11754cd72aec309bf52f7687212e8957",
+    "3c819d9a9bed087615030b65",
+    "",
+    "",
+    "",
+    "250327c674aaf477aef2675748cf6971"
+  },
+  { "ca47248ac0b6f8372a97ac43508308ed",
+    "ffd2b598feabc9019262d2be",
+    "",
+    "",
+    "",
+    "60d20404af527d248d893ae495707d1a"
+  },
+  { NULL }
+};
+
+const TestVector test_group_1[] = {
+  { "77be63708971c4e240d1cb79e8d77feb",
+    "e0e00f19fed7ba0136a797f3",
+    "",
+    "7a43ec1d9c0a5a78a0b16533a6213cab",
+    "",
+    "209fcc8d3675ed938e9c7166709dd946"
+  },
+  { "7680c5d3ca6154758e510f4d25b98820",
+    "f8f105f9c3df4965780321f8",
+    "",
+    "c94c410194c765e3dcc7964379758ed3",
+    "",
+    "94dca8edfcf90bb74b153c8d48a17930"
+  },
+  { NULL }
+};
+
+const TestVector test_group_2[] = {
+  { "7fddb57453c241d03efbed3ac44e371c",
+    "ee283a3fc75575e33efd4887",
+    "d5de42b461646c255c87bd2962d3b9a2",
+    "",
+    "2ccda4a5415cb91e135c2a0f78c9b2fd",
+    "b36d1df9b9d5e596f83e8b7f52971cb3"
+  },
+  { "ab72c77b97cb5fe9a382d9fe81ffdbed",
+    "54cc7dc2c37ec006bcc6d1da",
+    "007c5e5b3e59df24a7c355584fc1518d",
+    "",
+    "0e1bde206a07a9c2c1b65300f8c64997",
+    "2b4401346697138c7a4891ee59867d0c"
+  },
+  { NULL }
+};
+
+const TestVector test_group_3[] = {
+  { "fe47fcce5fc32665d2ae399e4eec72ba",
+    "5adb9609dbaeb58cbd6e7275",
+    "7c0e88c88899a779228465074797cd4c2e1498d259b54390b85e3eef1c02df60e743f1"
+    "b840382c4bccaf3bafb4ca8429bea063",
+    "88319d6e1d3ffa5f987199166c8a9b56c2aeba5a",
+    "98f4826f05a265e6dd2be82db241c0fbbbf9ffb1c173aa83964b7cf539304373636525"
+    "3ddbc5db8778371495da76d269e5db3e",
+    "291ef1982e4defedaa2249f898556b47"
+  },
+  { "ec0c2ba17aa95cd6afffe949da9cc3a8",
+    "296bce5b50b7d66096d627ef",
+    "b85b3753535b825cbe5f632c0b843c741351f18aa484281aebec2f45bb9eea2d79d987"
+    "b764b9611f6c0f8641843d5d58f3a242",
+    "f8d00f05d22bf68599bcdeb131292ad6e2df5d14",
+    "a7443d31c26bdf2a1c945e29ee4bd344a99cfaf3aa71f8b3f191f83c2adfc7a0716299"
+    "5506fde6309ffc19e716eddf1a828c5a",
+    "890147971946b627c40016da1ecf3e77"
+  },
+  { NULL }
+};
+
+const TestVector test_group_4[] = {
+  { "2c1f21cf0f6fb3661943155c3e3d8492",
+    "23cb5ff362e22426984d1907",
+    "42f758836986954db44bf37c6ef5e4ac0adaf38f27252a1b82d02ea949c8a1a2dbc0d6"
+    "8b5615ba7c1220ff6510e259f06655d8",
+    "5d3624879d35e46849953e45a32a624d6a6c536ed9857c613b572b0333e701557a713e"
+    "3f010ecdf9a6bd6c9e3e44b065208645aff4aabee611b391528514170084ccf587177f"
+    "4488f33cfb5e979e42b6e1cfc0a60238982a7aec",
+    "81824f0e0d523db30d3da369fdc0d60894c7a0a20646dd015073ad2732bd989b14a222"
+    "b6ad57af43e1895df9dca2a5344a62cc",
+    "57a3ee28136e94c74838997ae9823f3a"
+  },
+  { "d9f7d2411091f947b4d6f1e2d1f0fb2e",
+    "e1934f5db57cc983e6b180e7",
+    "73ed042327f70fe9c572a61545eda8b2a0c6e1d6c291ef19248e973aee6c312012f490"
+    "c2c6f6166f4a59431e182663fcaea05a",
+    "0a8a18a7150e940c3d87b38e73baee9a5c049ee21795663e264b694a949822b639092d"
+    "0e67015e86363583fcf0ca645af9f43375f05fdb4ce84f411dcbca73c2220dea03a201"
+    "15d2e51398344b16bee1ed7c499b353d6c597af8",
+    "aaadbd5c92e9151ce3db7210b8714126b73e43436d242677afa50384f2149b831f1d57"
+    "3c7891c2a91fbc48db29967ec9542b23",
+    "21b51ca862cb637cdd03b99a0f93b134"
+  },
+  { NULL }
+};
+
+const TestVector test_group_5[] = {
+  { "fe9bb47deb3a61e423c2231841cfd1fb",
+    "4d328eb776f500a2f7fb47aa",
+    "f1cc3818e421876bb6b8bbd6c9",
+    "",
+    "b88c5c1977b35b517b0aeae967",
+    "43fd4727fe5cdb4b5b42818dea7ef8c9"
+  },
+  { "6703df3701a7f54911ca72e24dca046a",
+    "12823ab601c350ea4bc2488c",
+    "793cd125b0b84a043e3ac67717",
+    "",
+    "b2051c80014f42f08735a7b0cd",
+    "38e6bcd29962e5f2c13626b85a877101"
+  },
+  { NULL }
+};
+
+const TestVector* const test_group_array[] = {
+  test_group_0,
+  test_group_1,
+  test_group_2,
+  test_group_3,
+  test_group_4,
+  test_group_5,
+};
+
+// Returns true if |ch| is a lowercase hexadecimal digit.
+bool IsHexDigit(char ch) {
+  return ('0' <= ch && ch <= '9') || ('a' <= ch && ch <= 'f');
+}
+
+// Converts a lowercase hexadecimal digit to its integer value.
+int HexDigitToInt(char ch) {
+  if ('0' <= ch && ch <= '9') {
+    return ch - '0';
+  }
+  return ch - 'a' + 10;
+}
+
+// |in| is a string consisting of lowercase hexadecimal digits, where
+// every two digits represent one byte. |out| is a buffer of size |max_len|.
+// Converts |in| to bytes and stores the bytes in the |out| buffer. The
+// number of bytes converted is returned in |*out_len|. Returns true on
+// success, false on failure.
+bool DecodeHexString(const char* in,
+                     char* out,
+                     size_t* out_len,
+                     size_t max_len) {
+  *out_len = 0;
+  while (*in != '\0') {
+    if (!IsHexDigit(*in) || !IsHexDigit(*(in + 1))) {
+      return false;
+    }
+    if (*out_len >= max_len) {
+      return false;
+    }
+    out[*out_len] = HexDigitToInt(*in) * 16 + HexDigitToInt(*(in + 1));
+    (*out_len)++;
+    in += 2;
+  }
+  return true;
+}
+
+}  // namespace
+
+namespace net {
+namespace test {
+
+class Aes128GcmEncrypterPeer {
+ public:
+  static QuicData* Encrypt(Aes128GcmEncrypter* encrypter,
+                           StringPiece nonce,
+                           StringPiece associated_data,
+                           StringPiece plaintext) {
+    return encrypter->EncryptWithNonce(nonce, associated_data, plaintext);
+  }
+};
+
+TEST(Aes128GcmEncrypterTest, Encrypt) {
+  if (!Aes128GcmEncrypter::IsSupported()) {
+    LOG(INFO) << "AES GCM not supported. Test skipped.";
+    return;
+  }
+
+  char key[1024];
+  size_t key_len;
+  char iv[1024];
+  size_t iv_len;
+  char pt[1024];
+  size_t pt_len;
+  char aad[1024];
+  size_t aad_len;
+  char ct[1024];
+  size_t ct_len;
+  char tag[1024];
+  size_t tag_len;
+
+  for (size_t i = 0; i < arraysize(test_group_array); i++) {
+    const TestVector* test_vector = test_group_array[i];
+    const TestGroupInfo& test_info = test_group_info[i];
+    for (size_t j = 0; test_vector[j].key != NULL; j++) {
+      // Decode the test vector.
+      ASSERT_TRUE(DecodeHexString(test_vector[j].key, key, &key_len,
+                                  sizeof(key)));
+      ASSERT_TRUE(DecodeHexString(test_vector[j].iv, iv, &iv_len,
+                                  sizeof(iv)));
+      ASSERT_TRUE(DecodeHexString(test_vector[j].pt, pt, &pt_len,
+                                  sizeof(pt)));
+      ASSERT_TRUE(DecodeHexString(test_vector[j].aad, aad, &aad_len,
+                                  sizeof(aad)));
+      ASSERT_TRUE(DecodeHexString(test_vector[j].ct, ct, &ct_len,
+                                  sizeof(ct)));
+      ASSERT_TRUE(DecodeHexString(test_vector[j].tag, tag, &tag_len,
+                                  sizeof(tag)));
+
+      // The test vector's lengths should look sane. Note that the lengths
+      // in |test_info| are in bits.
+      EXPECT_EQ(test_info.key_len, key_len * 8);
+      EXPECT_EQ(test_info.iv_len, iv_len * 8);
+      EXPECT_EQ(test_info.pt_len, pt_len * 8);
+      EXPECT_EQ(test_info.aad_len, aad_len * 8);
+      EXPECT_EQ(test_info.pt_len, ct_len * 8);
+      EXPECT_EQ(test_info.tag_len, tag_len * 8);
+
+      Aes128GcmEncrypter encrypter;
+      ASSERT_TRUE(encrypter.SetKey(StringPiece(key, key_len)));
+      scoped_ptr<QuicData> encrypted(Aes128GcmEncrypterPeer::Encrypt(
+          &encrypter, StringPiece(iv, iv_len), StringPiece(aad, aad_len),
+          StringPiece(pt, pt_len)));
+      ASSERT_TRUE(encrypted.get());
+      ASSERT_EQ(ct_len + tag_len, encrypted->length());
+      test::CompareCharArraysWithHexError(
+          "ciphertext", encrypted->data(), ct_len,
+          ct, ct_len);
+      test::CompareCharArraysWithHexError(
+          "authentication tag", encrypted->data() + ct_len, tag_len,
+          tag, tag_len);
+    }
+  }
+}
+
+TEST(Aes128GcmEncrypterTest, GetMaxPlaintextSize) {
+  Aes128GcmEncrypter encrypter;
+  EXPECT_EQ(1000u, encrypter.GetMaxPlaintextSize(1016));
+  EXPECT_EQ(100u, encrypter.GetMaxPlaintextSize(116));
+  EXPECT_EQ(10u, encrypter.GetMaxPlaintextSize(26));
+}
+
+TEST(Aes128GcmEncrypterTest, GetCiphertextSize) {
+  Aes128GcmEncrypter encrypter;
+  EXPECT_EQ(1016u, encrypter.GetCiphertextSize(1000));
+  EXPECT_EQ(116u, encrypter.GetCiphertextSize(100));
+  EXPECT_EQ(26u, encrypter.GetCiphertextSize(10));
+}
+
+}  // namespace test
+}  // namespace net