Implement support for checking bad IPs aka MatchMalwareIP

components/safe_browsing_db/v4_protocol_manager_util_unittest.cc

Index: components/safe_browsing_db/v4_protocol_manager_util_unittest.cc
diff --git a/components/safe_browsing_db/v4_protocol_manager_util_unittest.cc b/components/safe_browsing_db/v4_protocol_manager_util_unittest.cc
index f3effaba41374b9759b7eae74be751070db02a86..0680d3cc060eea2bf1c9b9702abd8363667663dd 100644
--- a/components/safe_browsing_db/v4_protocol_manager_util_unittest.cc
+++ b/components/safe_browsing_db/v4_protocol_manager_util_unittest.cc
@@ -238,4 +238,35 @@ TEST_F(V4ProtocolManagerUtilTest, CanonicalizeUrl) {
   }
 }
 
+TEST_F(V4ProtocolManagerUtilTest, TestIPAddressToEncodedIPV6) {
+  // To verify the test values, here's the python code:
+  // >> import socket, hashlib, binascii
+  // >> hashlib.sha1(socket.inet_pton(socket.AF_INET6, input)).digest() +
+  // chr(128)
+  // For example:
+  // >>> hashlib.sha1(socket.inet_pton(socket.AF_INET6,
+  // '::ffff:192.168.1.1')).digest() + chr(128)
+  // 'X\xf8\xa1\x17I\xe6Pl\xfd\xdb\xbb\xa0\x0c\x02\x9d#\n|\xe7\xcd\x80'
+  std::vector<std::tuple<bool, std::string, std::string>> test_cases = {
+      std::make_tuple(false, "", ""),
+      std::make_tuple(
+          true, "192.168.1.1",
+          "X\xF8\xA1\x17I\xE6Pl\xFD\xDB\xBB\xA0\f\x2\x9D#\n|\xE7\xCD\x80"),
+      std::make_tuple(
+          true, "::",
+          "\xE1)\xF2|Q\x3\xBC\\\xC4K\xCD\xF0\xA1^\x16\rDPf\xFF\x80")};
+  for (size_t i = 0; i < test_cases.size(); i++) {
+    DVLOG(1) << "Running case: " << i;
+    bool success = std::get<0>(test_cases[i]);
+    const auto& input = std::get<1>(test_cases[i]);
+    const auto& expected_output = std::get<2>(test_cases[i]);
+    std::string encoded_ip;
+    ASSERT_EQ(success, V4ProtocolManagerUtil::IPAddressToEncodedIPV6Hash(
+                           input, &encoded_ip));
+    if (success) {
+      ASSERT_EQ(expected_output, encoded_ip);
+    }
+  }
+}
+
 }  // namespace safe_browsing