Make HSTS headers not clobber preloaded pins.

net/http/http_security_headers_unittest.cc

Index: net/http/http_security_headers_unittest.cc
diff --git a/net/http/http_security_headers_unittest.cc b/net/http/http_security_headers_unittest.cc
index 42a5ee9896062504e21575f23519983d5caa9652..ec17568123730047481299ce2df9c4b31402f3d9 100644
--- a/net/http/http_security_headers_unittest.cc
+++ b/net/http/http_security_headers_unittest.cc
@@ -455,8 +455,8 @@ TEST_F(HttpSecurityHeadersTest, UpdateDynamicPKPOnly) {
   // docs.google.com has preloaded pins.
   std::string domain = "docs.google.com";
   EXPECT_TRUE(state.GetDomainState(domain, true, &domain_state));
-  EXPECT_GT(domain_state.static_spki_hashes.size(), 1UL);
-  HashValueVector saved_hashes = domain_state.static_spki_hashes;
+  EXPECT_GT(domain_state.static_pkp.spki_hashes.size(), 1UL);
+  HashValueVector saved_hashes = domain_state.static_pkp.spki_hashes;
 
   // Add a header, which should only update the dynamic state.
   HashValue good_hash = GetTestHashValue(1, HASH_VALUE_SHA1);
@@ -480,40 +480,80 @@ TEST_F(HttpSecurityHeadersTest, UpdateDynamicPKPOnly) {
                                          &static_domain_state));
   for (size_t i = 0; i < saved_hashes.size(); ++i) {
     EXPECT_TRUE(HashValuesEqual(
-        saved_hashes[i])(static_domain_state.static_spki_hashes[i]));
+        saved_hashes[i])(static_domain_state.static_pkp.spki_hashes[i]));
   }
 
   // Expect the dynamic state to reflect the header.
   TransportSecurityState::DomainState dynamic_domain_state;
   EXPECT_TRUE(state.GetDynamicDomainState(domain, &dynamic_domain_state));
-  EXPECT_EQ(2UL, dynamic_domain_state.dynamic_spki_hashes.size());
+  EXPECT_EQ(2UL, dynamic_domain_state.dynamic_pkp.spki_hashes.size());
 
   HashValueVector::const_iterator hash = std::find_if(
-      dynamic_domain_state.dynamic_spki_hashes.begin(),
-      dynamic_domain_state.dynamic_spki_hashes.end(),
+      dynamic_domain_state.dynamic_pkp.spki_hashes.begin(),
+      dynamic_domain_state.dynamic_pkp.spki_hashes.end(),
       HashValuesEqual(good_hash));
-  EXPECT_NE(dynamic_domain_state.dynamic_spki_hashes.end(), hash);
+  EXPECT_NE(dynamic_domain_state.dynamic_pkp.spki_hashes.end(), hash);
 
   hash = std::find_if(
-      dynamic_domain_state.dynamic_spki_hashes.begin(),
-      dynamic_domain_state.dynamic_spki_hashes.end(),
+      dynamic_domain_state.dynamic_pkp.spki_hashes.begin(),
+      dynamic_domain_state.dynamic_pkp.spki_hashes.end(),
       HashValuesEqual(backup_hash));
-  EXPECT_NE(dynamic_domain_state.dynamic_spki_hashes.end(), hash);
+  EXPECT_NE(dynamic_domain_state.dynamic_pkp.spki_hashes.end(), hash);
 
   // Expect the overall state to reflect the header, too.
   EXPECT_TRUE(state.GetDomainState(domain, true, &domain_state));
-  EXPECT_EQ(2UL, domain_state.dynamic_spki_hashes.size());
+  EXPECT_EQ(2UL, domain_state.dynamic_pkp.spki_hashes.size());
 
-  hash = std::find_if(domain_state.dynamic_spki_hashes.begin(),
-                      domain_state.dynamic_spki_hashes.end(),
+  hash = std::find_if(domain_state.dynamic_pkp.spki_hashes.begin(),
+                      domain_state.dynamic_pkp.spki_hashes.end(),
                       HashValuesEqual(good_hash));
-  EXPECT_NE(domain_state.dynamic_spki_hashes.end(), hash);
+  EXPECT_NE(domain_state.dynamic_pkp.spki_hashes.end(), hash);
 
   hash = std::find_if(
-      domain_state.dynamic_spki_hashes.begin(),
-      domain_state.dynamic_spki_hashes.end(),
+      domain_state.dynamic_pkp.spki_hashes.begin(),
+      domain_state.dynamic_pkp.spki_hashes.end(),
       HashValuesEqual(backup_hash));
-  EXPECT_NE(domain_state.dynamic_spki_hashes.end(), hash);
+  EXPECT_NE(domain_state.dynamic_pkp.spki_hashes.end(), hash);
+}
+
+TEST_F(HttpSecurityHeadersTest, NoClobberPins) {
+  TransportSecurityState state;
+  TransportSecurityState::DomainState domain_state;
+
+  std::string domain("accounts.google.com");
+
+  // Retrieve the DomainState as it is by default, including its known good
+  // pins. Assert sanity.
+  EXPECT_TRUE(state.GetDomainState(domain, true, &domain_state));
+  HashValueVector saved_hashes = domain_state.static_pkp.spki_hashes;
+  EXPECT_TRUE(domain_state.ShouldUpgradeToSSL());
+  EXPECT_TRUE(domain_state.HasPublicKeyPins());
+
+  // Add a dynamic header. Due to bug crbug.com/29386, this will mask the
+  // static pins. However, we temporarily work around that in
+  // CheckPublicKeyPins (invoked below). CheckPublicKeyPins should still
+  // pass when given the original |saved_hashes|.
+  EXPECT_TRUE(state.AddHSTSHeader(domain, "includesubdomains; max-age=10000"));
+  EXPECT_TRUE(domain_state.ShouldUpgradeToSSL());
+  EXPECT_TRUE(state.GetDomainState(domain, true, &domain_state));
+  EXPECT_TRUE(domain_state.CheckPublicKeyPins(saved_hashes));
+
+  // Add a header, which should only update the dynamic state.
+  HashValue good_hash = GetTestHashValue(1, HASH_VALUE_SHA1);
+  std::string good_pin = GetTestPin(1, HASH_VALUE_SHA1);
+  std::string backup_pin = GetTestPin(2, HASH_VALUE_SHA1);
+  std::string header = "max-age = 10000; " + good_pin + "; " + backup_pin;
+
+  // Construct a fake SSLInfo that will pass AddHPKPHeader's checks.
+  SSLInfo ssl_info;
+  ssl_info.public_key_hashes.push_back(good_hash);
+  ssl_info.public_key_hashes.push_back(saved_hashes[0]);
+  EXPECT_TRUE(state.AddHPKPHeader(domain, header, ssl_info));
+
+  EXPECT_TRUE(state.AddHPKPHeader(domain, header, ssl_info));
+  EXPECT_TRUE(domain_state.ShouldUpgradeToSSL());
+  EXPECT_TRUE(state.GetDomainState(domain, true, &domain_state));
+  EXPECT_TRUE(domain_state.CheckPublicKeyPins(saved_hashes));
 }
 
 };    // namespace net