tests: Construct two bad packages at runtime for VerifierTest.

For the BadPackage tests from VerifierTest: one alters the footer, and
the other alters the metadata. Move the two tests to be based on
otasigned_v3.zip (they're based on otasigned_v1.zip previously). Also
construct the testdata files dynamically (to save the space and for
better readability).

Test: recovery_component_test
Change-Id: I7604d563f8b4fa0c55fec8730c063384158e3abc
(cherry picked from commit 217d9f9)

tests/component/verifier_test.cpp

@@ -117,6 +117,51 @@ TEST(VerifierTest, load_keys_invalid_keys) {
   ASSERT_FALSE(load_keys(key_file5.path, certs));
 }
 
+TEST(VerifierTest, BadPackage_AlteredFooter) {
+  std::string testkey_v3;
+  ASSERT_TRUE(android::base::ReadFileToString(from_testdata_base("testkey_v3.txt"), &testkey_v3));
+  TemporaryFile key_file1;
+  ASSERT_TRUE(android::base::WriteStringToFile(testkey_v3, key_file1.path));
+  std::vector<Certificate> certs;
+  ASSERT_TRUE(load_keys(key_file1.path, certs));
+
+  std::string package;
+  ASSERT_TRUE(android::base::ReadFileToString(from_testdata_base("otasigned_v3.zip"), &package));
+  ASSERT_EQ(std::string("\xc0\x06\xff\xff\xd2\x06", 6), package.substr(package.size() - 6, 6));
+
+  // Alter the footer.
+  package[package.size() - 5] = '\x05';
+  ASSERT_EQ(VERIFY_FAILURE,
+            verify_file(reinterpret_cast<const unsigned char*>(package.data()), package.size(),
+                        certs));
+}
+
+TEST(VerifierTest, BadPackage_AlteredContent) {
+  std::string testkey_v3;
+  ASSERT_TRUE(android::base::ReadFileToString(from_testdata_base("testkey_v3.txt"), &testkey_v3));
+  TemporaryFile key_file1;
+  ASSERT_TRUE(android::base::WriteStringToFile(testkey_v3, key_file1.path));
+  std::vector<Certificate> certs;
+  ASSERT_TRUE(load_keys(key_file1.path, certs));
+
+  std::string package;
+  ASSERT_TRUE(android::base::ReadFileToString(from_testdata_base("otasigned_v3.zip"), &package));
+  ASSERT_GT(package.size(), static_cast<size_t>(100));
+
+  // Alter the content.
+  std::string altered1(package);
+  altered1[50] += 1;
+  ASSERT_EQ(VERIFY_FAILURE,
+            verify_file(reinterpret_cast<const unsigned char*>(altered1.data()), altered1.size(),
+                        certs));
+
+  std::string altered2(package);
+  altered2[10] += 1;
+  ASSERT_EQ(VERIFY_FAILURE,
+            verify_file(reinterpret_cast<const unsigned char*>(altered2.data()), altered2.size(),
+                        certs));
+}
+
 TEST(VerifierTest, BadPackage_SignatureStartOutOfBounds) {
   std::string testkey_v3;
   ASSERT_TRUE(android::base::ReadFileToString(from_testdata_base("testkey_v3.txt"), &testkey_v3));
@@ -174,6 +219,4 @@ INSTANTIATE_TEST_CASE_P(WrongHash, VerifierFailureTest,
 INSTANTIATE_TEST_CASE_P(BadPackage, VerifierFailureTest,
     ::testing::Values(
       std::vector<std::string>({"random.zip", "v1"}),
-      std::vector<std::string>({"fake-eocd.zip", "v1"}),
-      std::vector<std::string>({"alter-metadata.zip", "v1"}),
-      std::vector<std::string>({"alter-footer.zip", "v1"})));
+      std::vector<std::string>({"fake-eocd.zip", "v1"})));