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      1 // Copyright (c) 2012 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 <set>
      6 #include <string>
      7 
      8 #include "base/basictypes.h"
      9 #include "base/files/file_path.h"
     10 #include "content/browser/child_process_security_policy_impl.h"
     11 #include "content/public/common/url_constants.h"
     12 #include "content/test/test_content_browser_client.h"
     13 #include "storage/browser/fileapi/file_permission_policy.h"
     14 #include "storage/browser/fileapi/file_system_url.h"
     15 #include "storage/browser/fileapi/isolated_context.h"
     16 #include "storage/common/fileapi/file_system_types.h"
     17 #include "testing/gtest/include/gtest/gtest.h"
     18 #include "url/gurl.h"
     19 
     20 namespace content {
     21 namespace {
     22 
     23 const int kRendererID = 42;
     24 const int kWorkerRendererID = kRendererID + 1;
     25 
     26 #if defined(FILE_PATH_USES_DRIVE_LETTERS)
     27 #define TEST_PATH(x) FILE_PATH_LITERAL("c:") FILE_PATH_LITERAL(x)
     28 #else
     29 #define TEST_PATH(x) FILE_PATH_LITERAL(x)
     30 #endif
     31 
     32 class ChildProcessSecurityPolicyTestBrowserClient
     33     : public TestContentBrowserClient {
     34  public:
     35   ChildProcessSecurityPolicyTestBrowserClient() {}
     36 
     37   virtual bool IsHandledURL(const GURL& url) OVERRIDE {
     38     return schemes_.find(url.scheme()) != schemes_.end();
     39   }
     40 
     41   void ClearSchemes() {
     42     schemes_.clear();
     43   }
     44 
     45   void AddScheme(const std::string& scheme) {
     46     schemes_.insert(scheme);
     47   }
     48 
     49  private:
     50   std::set<std::string> schemes_;
     51 };
     52 
     53 }  // namespace
     54 
     55 class ChildProcessSecurityPolicyTest : public testing::Test {
     56  public:
     57   ChildProcessSecurityPolicyTest() : old_browser_client_(NULL) {
     58   }
     59 
     60   virtual void SetUp() {
     61     old_browser_client_ = SetBrowserClientForTesting(&test_browser_client_);
     62 
     63     // Claim to always handle chrome:// URLs because the CPSP's notion of
     64     // allowing WebUI bindings is hard-wired to this particular scheme.
     65     test_browser_client_.AddScheme(kChromeUIScheme);
     66 
     67     // Claim to always handle file:// URLs like the browser would.
     68     // net::URLRequest::IsHandledURL() no longer claims support for default
     69     // protocols as this is the responsibility of the browser (which is
     70     // responsible for adding the appropriate ProtocolHandler).
     71     test_browser_client_.AddScheme(url::kFileScheme);
     72   }
     73 
     74   virtual void TearDown() {
     75     test_browser_client_.ClearSchemes();
     76     SetBrowserClientForTesting(old_browser_client_);
     77   }
     78 
     79  protected:
     80   void RegisterTestScheme(const std::string& scheme) {
     81     test_browser_client_.AddScheme(scheme);
     82   }
     83 
     84   void GrantPermissionsForFile(ChildProcessSecurityPolicyImpl* p,
     85                                int child_id,
     86                                const base::FilePath& file,
     87                                int permissions) {
     88     p->GrantPermissionsForFile(child_id, file, permissions);
     89   }
     90 
     91   void CheckHasNoFileSystemPermission(ChildProcessSecurityPolicyImpl* p,
     92                                       const std::string& child_id) {
     93     EXPECT_FALSE(p->CanReadFileSystem(kRendererID, child_id));
     94     EXPECT_FALSE(p->CanReadWriteFileSystem(kRendererID, child_id));
     95     EXPECT_FALSE(p->CanCopyIntoFileSystem(kRendererID, child_id));
     96     EXPECT_FALSE(p->CanDeleteFromFileSystem(kRendererID, child_id));
     97   }
     98 
     99   void CheckHasNoFileSystemFilePermission(ChildProcessSecurityPolicyImpl* p,
    100                                           const base::FilePath& file,
    101                                           const storage::FileSystemURL& url) {
    102     EXPECT_FALSE(p->CanReadFile(kRendererID, file));
    103     EXPECT_FALSE(p->CanCreateReadWriteFile(kRendererID, file));
    104     EXPECT_FALSE(p->CanReadFileSystemFile(kRendererID, url));
    105     EXPECT_FALSE(p->CanWriteFileSystemFile(kRendererID, url));
    106     EXPECT_FALSE(p->CanCreateFileSystemFile(kRendererID, url));
    107     EXPECT_FALSE(p->CanCreateReadWriteFileSystemFile(kRendererID, url));
    108     EXPECT_FALSE(p->CanCopyIntoFileSystemFile(kRendererID, url));
    109     EXPECT_FALSE(p->CanDeleteFileSystemFile(kRendererID, url));
    110   }
    111 
    112  private:
    113   ChildProcessSecurityPolicyTestBrowserClient test_browser_client_;
    114   ContentBrowserClient* old_browser_client_;
    115 };
    116 
    117 
    118 TEST_F(ChildProcessSecurityPolicyTest, IsWebSafeSchemeTest) {
    119   ChildProcessSecurityPolicyImpl* p =
    120       ChildProcessSecurityPolicyImpl::GetInstance();
    121 
    122   EXPECT_TRUE(p->IsWebSafeScheme(url::kHttpScheme));
    123   EXPECT_TRUE(p->IsWebSafeScheme(url::kHttpsScheme));
    124   EXPECT_TRUE(p->IsWebSafeScheme(url::kFtpScheme));
    125   EXPECT_TRUE(p->IsWebSafeScheme(url::kDataScheme));
    126   EXPECT_TRUE(p->IsWebSafeScheme("feed"));
    127   EXPECT_TRUE(p->IsWebSafeScheme(url::kBlobScheme));
    128   EXPECT_TRUE(p->IsWebSafeScheme(url::kFileSystemScheme));
    129 
    130   EXPECT_FALSE(p->IsWebSafeScheme("registered-web-safe-scheme"));
    131   p->RegisterWebSafeScheme("registered-web-safe-scheme");
    132   EXPECT_TRUE(p->IsWebSafeScheme("registered-web-safe-scheme"));
    133 
    134   EXPECT_FALSE(p->IsWebSafeScheme(kChromeUIScheme));
    135 }
    136 
    137 TEST_F(ChildProcessSecurityPolicyTest, IsPseudoSchemeTest) {
    138   ChildProcessSecurityPolicyImpl* p =
    139       ChildProcessSecurityPolicyImpl::GetInstance();
    140 
    141   EXPECT_TRUE(p->IsPseudoScheme(url::kAboutScheme));
    142   EXPECT_TRUE(p->IsPseudoScheme(url::kJavaScriptScheme));
    143   EXPECT_TRUE(p->IsPseudoScheme(kViewSourceScheme));
    144 
    145   EXPECT_FALSE(p->IsPseudoScheme("registered-pseudo-scheme"));
    146   p->RegisterPseudoScheme("registered-pseudo-scheme");
    147   EXPECT_TRUE(p->IsPseudoScheme("registered-pseudo-scheme"));
    148 
    149   EXPECT_FALSE(p->IsPseudoScheme(kChromeUIScheme));
    150 }
    151 
    152 TEST_F(ChildProcessSecurityPolicyTest, StandardSchemesTest) {
    153   ChildProcessSecurityPolicyImpl* p =
    154       ChildProcessSecurityPolicyImpl::GetInstance();
    155 
    156   p->Add(kRendererID);
    157 
    158   // Safe
    159   EXPECT_TRUE(p->CanRequestURL(kRendererID, GURL("http://www.google.com/")));
    160   EXPECT_TRUE(p->CanRequestURL(kRendererID, GURL("https://www.paypal.com/")));
    161   EXPECT_TRUE(p->CanRequestURL(kRendererID, GURL("ftp://ftp.gnu.org/")));
    162   EXPECT_TRUE(p->CanRequestURL(kRendererID, GURL("data:text/html,<b>Hi</b>")));
    163   EXPECT_TRUE(p->CanRequestURL(kRendererID,
    164                                GURL("view-source:http://www.google.com/")));
    165   EXPECT_TRUE(p->CanRequestURL(
    166       kRendererID, GURL("filesystem:http://localhost/temporary/a.gif")));
    167 
    168   // Dangerous
    169   EXPECT_FALSE(p->CanRequestURL(kRendererID,
    170                                 GURL("file:///etc/passwd")));
    171   EXPECT_FALSE(p->CanRequestURL(kRendererID,
    172                                 GURL("chrome://foo/bar")));
    173 
    174   p->Remove(kRendererID);
    175 }
    176 
    177 TEST_F(ChildProcessSecurityPolicyTest, AboutTest) {
    178   ChildProcessSecurityPolicyImpl* p =
    179       ChildProcessSecurityPolicyImpl::GetInstance();
    180 
    181   p->Add(kRendererID);
    182 
    183   EXPECT_TRUE(p->CanRequestURL(kRendererID, GURL("about:blank")));
    184   EXPECT_TRUE(p->CanRequestURL(kRendererID, GURL("about:BlAnK")));
    185   EXPECT_TRUE(p->CanRequestURL(kRendererID, GURL("aBouT:BlAnK")));
    186   EXPECT_TRUE(p->CanRequestURL(kRendererID, GURL("aBouT:blank")));
    187 
    188   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("about:memory")));
    189   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("about:crash")));
    190   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("about:cache")));
    191   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("about:hang")));
    192 
    193   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("aBoUt:memory")));
    194   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("about:CrASh")));
    195   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("abOuT:cAChe")));
    196 
    197   // Requests for about: pages should be denied.
    198   p->GrantRequestURL(kRendererID, GURL("about:crash"));
    199   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("about:crash")));
    200 
    201   // These requests for chrome:// pages should be granted.
    202   GURL chrome_url("chrome://foo");
    203   p->GrantRequestURL(kRendererID, chrome_url);
    204   EXPECT_TRUE(p->CanRequestURL(kRendererID, chrome_url));
    205 
    206   p->Remove(kRendererID);
    207 }
    208 
    209 TEST_F(ChildProcessSecurityPolicyTest, JavaScriptTest) {
    210   ChildProcessSecurityPolicyImpl* p =
    211       ChildProcessSecurityPolicyImpl::GetInstance();
    212 
    213   p->Add(kRendererID);
    214 
    215   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("javascript:alert('xss')")));
    216   p->GrantRequestURL(kRendererID, GURL("javascript:alert('xss')"));
    217   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("javascript:alert('xss')")));
    218 
    219   p->Remove(kRendererID);
    220 }
    221 
    222 TEST_F(ChildProcessSecurityPolicyTest, RegisterWebSafeSchemeTest) {
    223   ChildProcessSecurityPolicyImpl* p =
    224       ChildProcessSecurityPolicyImpl::GetInstance();
    225 
    226   p->Add(kRendererID);
    227 
    228   // Currently, "asdf" is destined for ShellExecute, so it is allowed.
    229   EXPECT_TRUE(p->CanRequestURL(kRendererID, GURL("asdf:rockers")));
    230 
    231   // Once we register "asdf", we default to deny.
    232   RegisterTestScheme("asdf");
    233   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("asdf:rockers")));
    234 
    235   // We can allow new schemes by adding them to the whitelist.
    236   p->RegisterWebSafeScheme("asdf");
    237   EXPECT_TRUE(p->CanRequestURL(kRendererID, GURL("asdf:rockers")));
    238 
    239   // Cleanup.
    240   p->Remove(kRendererID);
    241 }
    242 
    243 TEST_F(ChildProcessSecurityPolicyTest, CanServiceCommandsTest) {
    244   ChildProcessSecurityPolicyImpl* p =
    245       ChildProcessSecurityPolicyImpl::GetInstance();
    246 
    247   p->Add(kRendererID);
    248 
    249   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("file:///etc/passwd")));
    250   p->GrantRequestURL(kRendererID, GURL("file:///etc/passwd"));
    251   EXPECT_TRUE(p->CanRequestURL(kRendererID, GURL("file:///etc/passwd")));
    252 
    253   // We should forget our state if we repeat a renderer id.
    254   p->Remove(kRendererID);
    255   p->Add(kRendererID);
    256   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("file:///etc/passwd")));
    257   p->Remove(kRendererID);
    258 }
    259 
    260 TEST_F(ChildProcessSecurityPolicyTest, ViewSource) {
    261   ChildProcessSecurityPolicyImpl* p =
    262       ChildProcessSecurityPolicyImpl::GetInstance();
    263 
    264   p->Add(kRendererID);
    265 
    266   // View source is determined by the embedded scheme.
    267   EXPECT_TRUE(p->CanRequestURL(kRendererID,
    268                                GURL("view-source:http://www.google.com/")));
    269   EXPECT_FALSE(p->CanRequestURL(kRendererID,
    270                                 GURL("view-source:file:///etc/passwd")));
    271   EXPECT_FALSE(p->CanRequestURL(kRendererID, GURL("file:///etc/passwd")));
    272   EXPECT_FALSE(p->CanRequestURL(
    273       kRendererID, GURL("view-source:view-source:http://www.google.com/")));
    274 
    275   p->GrantRequestURL(kRendererID, GURL("view-source:file:///etc/passwd"));
    276   // View source needs to be able to request the embedded scheme.
    277   EXPECT_TRUE(p->CanRequestURL(kRendererID,
    278                                GURL("view-source:file:///etc/passwd")));
    279   EXPECT_TRUE(p->CanRequestURL(kRendererID, GURL("file:///etc/passwd")));
    280 
    281   p->Remove(kRendererID);
    282 }
    283 
    284 TEST_F(ChildProcessSecurityPolicyTest, SpecificFile) {
    285   ChildProcessSecurityPolicyImpl* p =
    286       ChildProcessSecurityPolicyImpl::GetInstance();
    287 
    288   p->Add(kRendererID);
    289 
    290   GURL icon_url("file:///tmp/foo.png");
    291   GURL sensitive_url("file:///etc/passwd");
    292   EXPECT_FALSE(p->CanRequestURL(kRendererID, icon_url));
    293   EXPECT_FALSE(p->CanRequestURL(kRendererID, sensitive_url));
    294 
    295   p->GrantRequestSpecificFileURL(kRendererID, icon_url);
    296   EXPECT_TRUE(p->CanRequestURL(kRendererID, icon_url));
    297   EXPECT_FALSE(p->CanRequestURL(kRendererID, sensitive_url));
    298 
    299   p->GrantRequestURL(kRendererID, icon_url);
    300   EXPECT_TRUE(p->CanRequestURL(kRendererID, icon_url));
    301   EXPECT_TRUE(p->CanRequestURL(kRendererID, sensitive_url));
    302 
    303   p->Remove(kRendererID);
    304 }
    305 
    306 TEST_F(ChildProcessSecurityPolicyTest, FileSystemGrantsTest) {
    307   ChildProcessSecurityPolicyImpl* p =
    308       ChildProcessSecurityPolicyImpl::GetInstance();
    309 
    310   p->Add(kRendererID);
    311   std::string read_id =
    312       storage::IsolatedContext::GetInstance()->RegisterFileSystemForVirtualPath(
    313           storage::kFileSystemTypeTest, "read_filesystem", base::FilePath());
    314   std::string read_write_id =
    315       storage::IsolatedContext::GetInstance()->RegisterFileSystemForVirtualPath(
    316           storage::kFileSystemTypeTest,
    317           "read_write_filesystem",
    318           base::FilePath());
    319   std::string copy_into_id =
    320       storage::IsolatedContext::GetInstance()->RegisterFileSystemForVirtualPath(
    321           storage::kFileSystemTypeTest,
    322           "copy_into_filesystem",
    323           base::FilePath());
    324   std::string delete_from_id =
    325       storage::IsolatedContext::GetInstance()->RegisterFileSystemForVirtualPath(
    326           storage::kFileSystemTypeTest,
    327           "delete_from_filesystem",
    328           base::FilePath());
    329 
    330   // Test initially having no permissions.
    331   CheckHasNoFileSystemPermission(p, read_id);
    332   CheckHasNoFileSystemPermission(p, read_write_id);
    333   CheckHasNoFileSystemPermission(p, copy_into_id);
    334   CheckHasNoFileSystemPermission(p, delete_from_id);
    335 
    336   // Testing varying combinations of grants and checks.
    337   p->GrantReadFileSystem(kRendererID, read_id);
    338   EXPECT_TRUE(p->CanReadFileSystem(kRendererID, read_id));
    339   EXPECT_FALSE(p->CanReadWriteFileSystem(kRendererID, read_id));
    340   EXPECT_FALSE(p->CanCopyIntoFileSystem(kRendererID, read_id));
    341   EXPECT_FALSE(p->CanDeleteFromFileSystem(kRendererID, read_id));
    342 
    343   p->GrantReadFileSystem(kRendererID, read_write_id);
    344   p->GrantWriteFileSystem(kRendererID, read_write_id);
    345   EXPECT_TRUE(p->CanReadFileSystem(kRendererID, read_write_id));
    346   EXPECT_TRUE(p->CanReadWriteFileSystem(kRendererID, read_write_id));
    347   EXPECT_FALSE(p->CanCopyIntoFileSystem(kRendererID, read_write_id));
    348   EXPECT_FALSE(p->CanDeleteFromFileSystem(kRendererID, read_write_id));
    349 
    350   p->GrantCopyIntoFileSystem(kRendererID, copy_into_id);
    351   EXPECT_FALSE(p->CanReadFileSystem(kRendererID, copy_into_id));
    352   EXPECT_FALSE(p->CanReadWriteFileSystem(kRendererID, copy_into_id));
    353   EXPECT_TRUE(p->CanCopyIntoFileSystem(kRendererID, copy_into_id));
    354   EXPECT_FALSE(p->CanDeleteFromFileSystem(kRendererID, copy_into_id));
    355 
    356   p->GrantDeleteFromFileSystem(kRendererID, delete_from_id);
    357   EXPECT_FALSE(p->CanReadFileSystem(kRendererID, delete_from_id));
    358   EXPECT_FALSE(p->CanReadWriteFileSystem(kRendererID, delete_from_id));
    359   EXPECT_FALSE(p->CanCopyIntoFileSystem(kRendererID, delete_from_id));
    360   EXPECT_TRUE(p->CanDeleteFromFileSystem(kRendererID, delete_from_id));
    361 
    362   // Test revoke permissions on renderer ID removal.
    363   p->Remove(kRendererID);
    364   CheckHasNoFileSystemPermission(p, read_id);
    365   CheckHasNoFileSystemPermission(p, read_write_id);
    366   CheckHasNoFileSystemPermission(p, copy_into_id);
    367   CheckHasNoFileSystemPermission(p, delete_from_id);
    368 
    369   // Test having no permissions upon re-adding same renderer ID.
    370   p->Add(kRendererID);
    371   CheckHasNoFileSystemPermission(p, read_id);
    372   CheckHasNoFileSystemPermission(p, read_write_id);
    373   CheckHasNoFileSystemPermission(p, copy_into_id);
    374   CheckHasNoFileSystemPermission(p, delete_from_id);
    375 
    376   // Cleanup.
    377   p->Remove(kRendererID);
    378   storage::IsolatedContext::GetInstance()->RevokeFileSystem(read_id);
    379   storage::IsolatedContext::GetInstance()->RevokeFileSystem(read_write_id);
    380   storage::IsolatedContext::GetInstance()->RevokeFileSystem(copy_into_id);
    381   storage::IsolatedContext::GetInstance()->RevokeFileSystem(delete_from_id);
    382 }
    383 
    384 TEST_F(ChildProcessSecurityPolicyTest, FilePermissionGrantingAndRevoking) {
    385   ChildProcessSecurityPolicyImpl* p =
    386       ChildProcessSecurityPolicyImpl::GetInstance();
    387 
    388   p->RegisterFileSystemPermissionPolicy(
    389       storage::kFileSystemTypeTest,
    390       storage::FILE_PERMISSION_USE_FILE_PERMISSION);
    391 
    392   p->Add(kRendererID);
    393   base::FilePath file(TEST_PATH("/dir/testfile"));
    394   file = file.NormalizePathSeparators();
    395   storage::FileSystemURL url = storage::FileSystemURL::CreateForTest(
    396       GURL("http://foo/"), storage::kFileSystemTypeTest, file);
    397 
    398   // Test initially having no permissions.
    399   CheckHasNoFileSystemFilePermission(p, file, url);
    400 
    401   // Testing every combination of permissions granting and revoking.
    402   p->GrantReadFile(kRendererID, file);
    403   EXPECT_TRUE(p->CanReadFile(kRendererID, file));
    404   EXPECT_FALSE(p->CanCreateReadWriteFile(kRendererID, file));
    405   EXPECT_TRUE(p->CanReadFileSystemFile(kRendererID, url));
    406   EXPECT_FALSE(p->CanWriteFileSystemFile(kRendererID, url));
    407   EXPECT_FALSE(p->CanCreateFileSystemFile(kRendererID, url));
    408   EXPECT_FALSE(p->CanCreateReadWriteFileSystemFile(kRendererID, url));
    409   EXPECT_FALSE(p->CanCopyIntoFileSystemFile(kRendererID, url));
    410   EXPECT_FALSE(p->CanDeleteFileSystemFile(kRendererID, url));
    411   p->RevokeAllPermissionsForFile(kRendererID, file);
    412   CheckHasNoFileSystemFilePermission(p, file, url);
    413 
    414   p->GrantCreateReadWriteFile(kRendererID, file);
    415   EXPECT_TRUE(p->CanReadFile(kRendererID, file));
    416   EXPECT_TRUE(p->CanCreateReadWriteFile(kRendererID, file));
    417   EXPECT_TRUE(p->CanReadFileSystemFile(kRendererID, url));
    418   EXPECT_TRUE(p->CanWriteFileSystemFile(kRendererID, url));
    419   EXPECT_TRUE(p->CanCreateFileSystemFile(kRendererID, url));
    420   EXPECT_TRUE(p->CanCreateReadWriteFileSystemFile(kRendererID, url));
    421   EXPECT_TRUE(p->CanCopyIntoFileSystemFile(kRendererID, url));
    422   EXPECT_TRUE(p->CanDeleteFileSystemFile(kRendererID, url));
    423   p->RevokeAllPermissionsForFile(kRendererID, file);
    424   CheckHasNoFileSystemFilePermission(p, file, url);
    425 
    426   // Test revoke permissions on renderer ID removal.
    427   p->GrantCreateReadWriteFile(kRendererID, file);
    428   EXPECT_TRUE(p->CanReadFile(kRendererID, file));
    429   EXPECT_TRUE(p->CanCreateReadWriteFile(kRendererID, file));
    430   EXPECT_TRUE(p->CanReadFileSystemFile(kRendererID, url));
    431   EXPECT_TRUE(p->CanWriteFileSystemFile(kRendererID, url));
    432   EXPECT_TRUE(p->CanCreateFileSystemFile(kRendererID, url));
    433   EXPECT_TRUE(p->CanCreateReadWriteFileSystemFile(kRendererID, url));
    434   EXPECT_TRUE(p->CanCopyIntoFileSystemFile(kRendererID, url));
    435   EXPECT_TRUE(p->CanDeleteFileSystemFile(kRendererID, url));
    436   p->Remove(kRendererID);
    437   CheckHasNoFileSystemFilePermission(p, file, url);
    438 
    439   // Test having no permissions upon re-adding same renderer ID.
    440   p->Add(kRendererID);
    441   CheckHasNoFileSystemFilePermission(p, file, url);
    442 
    443   // Cleanup.
    444   p->Remove(kRendererID);
    445 }
    446 
    447 TEST_F(ChildProcessSecurityPolicyTest, FilePermissions) {
    448   base::FilePath granted_file = base::FilePath(TEST_PATH("/home/joe"));
    449   base::FilePath sibling_file = base::FilePath(TEST_PATH("/home/bob"));
    450   base::FilePath child_file = base::FilePath(TEST_PATH("/home/joe/file"));
    451   base::FilePath parent_file = base::FilePath(TEST_PATH("/home"));
    452   base::FilePath parent_slash_file = base::FilePath(TEST_PATH("/home/"));
    453   base::FilePath child_traversal1 =
    454       base::FilePath(TEST_PATH("/home/joe/././file"));
    455   base::FilePath child_traversal2 = base::FilePath(
    456       TEST_PATH("/home/joe/file/../otherfile"));
    457   base::FilePath evil_traversal1 =
    458       base::FilePath(TEST_PATH("/home/joe/../../etc/passwd"));
    459   base::FilePath evil_traversal2 = base::FilePath(
    460       TEST_PATH("/home/joe/./.././../etc/passwd"));
    461   base::FilePath self_traversal =
    462       base::FilePath(TEST_PATH("/home/joe/../joe/file"));
    463   base::FilePath relative_file = base::FilePath(FILE_PATH_LITERAL("home/joe"));
    464 
    465   ChildProcessSecurityPolicyImpl* p =
    466       ChildProcessSecurityPolicyImpl::GetInstance();
    467 
    468   // Grant permissions for a file.
    469   p->Add(kRendererID);
    470   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, granted_file,
    471                                         base::File::FLAG_OPEN));
    472 
    473   GrantPermissionsForFile(p, kRendererID, granted_file,
    474                              base::File::FLAG_OPEN |
    475                              base::File::FLAG_OPEN_TRUNCATED |
    476                              base::File::FLAG_READ |
    477                              base::File::FLAG_WRITE);
    478   EXPECT_TRUE(p->HasPermissionsForFile(kRendererID, granted_file,
    479                                        base::File::FLAG_OPEN |
    480                                        base::File::FLAG_OPEN_TRUNCATED |
    481                                        base::File::FLAG_READ |
    482                                        base::File::FLAG_WRITE));
    483   EXPECT_TRUE(p->HasPermissionsForFile(kRendererID, granted_file,
    484                                        base::File::FLAG_OPEN |
    485                                        base::File::FLAG_READ));
    486   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, granted_file,
    487                                         base::File::FLAG_CREATE));
    488   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, granted_file, 0));
    489   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, granted_file,
    490                                         base::File::FLAG_CREATE |
    491                                         base::File::FLAG_OPEN_TRUNCATED |
    492                                         base::File::FLAG_READ |
    493                                         base::File::FLAG_WRITE));
    494   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, sibling_file,
    495                                         base::File::FLAG_OPEN |
    496                                         base::File::FLAG_READ));
    497   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, parent_file,
    498                                         base::File::FLAG_OPEN |
    499                                         base::File::FLAG_READ));
    500   EXPECT_TRUE(p->HasPermissionsForFile(kRendererID, child_file,
    501                                         base::File::FLAG_OPEN |
    502                                         base::File::FLAG_READ));
    503   EXPECT_TRUE(p->HasPermissionsForFile(kRendererID, child_traversal1,
    504                                         base::File::FLAG_OPEN |
    505                                         base::File::FLAG_READ));
    506   EXPECT_TRUE(p->HasPermissionsForFile(kRendererID, child_traversal2,
    507                                         base::File::FLAG_OPEN |
    508                                         base::File::FLAG_READ));
    509   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, evil_traversal1,
    510                                         base::File::FLAG_OPEN |
    511                                         base::File::FLAG_READ));
    512   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, evil_traversal2,
    513                                         base::File::FLAG_OPEN |
    514                                         base::File::FLAG_READ));
    515   // CPSP doesn't allow this case for the sake of simplicity.
    516   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, self_traversal,
    517                                         base::File::FLAG_OPEN |
    518                                         base::File::FLAG_READ));
    519   p->Remove(kRendererID);
    520 
    521   // Grant permissions for the directory the file is in.
    522   p->Add(kRendererID);
    523   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, granted_file,
    524                                         base::File::FLAG_OPEN));
    525   GrantPermissionsForFile(p, kRendererID, parent_file,
    526                              base::File::FLAG_OPEN |
    527                              base::File::FLAG_READ);
    528   EXPECT_TRUE(p->HasPermissionsForFile(kRendererID, granted_file,
    529                                         base::File::FLAG_OPEN));
    530   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, granted_file,
    531                                         base::File::FLAG_READ |
    532                                         base::File::FLAG_WRITE));
    533   p->Remove(kRendererID);
    534 
    535   // Grant permissions for the directory the file is in (with trailing '/').
    536   p->Add(kRendererID);
    537   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, granted_file,
    538                                         base::File::FLAG_OPEN));
    539   GrantPermissionsForFile(p, kRendererID, parent_slash_file,
    540                              base::File::FLAG_OPEN |
    541                              base::File::FLAG_READ);
    542   EXPECT_TRUE(p->HasPermissionsForFile(kRendererID, granted_file,
    543                                         base::File::FLAG_OPEN));
    544   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, granted_file,
    545                                         base::File::FLAG_READ |
    546                                         base::File::FLAG_WRITE));
    547 
    548   // Grant permissions for the file (should overwrite the permissions granted
    549   // for the directory).
    550   GrantPermissionsForFile(p, kRendererID, granted_file,
    551                              base::File::FLAG_TEMPORARY);
    552   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, granted_file,
    553                                         base::File::FLAG_OPEN));
    554   EXPECT_TRUE(p->HasPermissionsForFile(kRendererID, granted_file,
    555                                        base::File::FLAG_TEMPORARY));
    556 
    557   // Revoke all permissions for the file (it should inherit its permissions
    558   // from the directory again).
    559   p->RevokeAllPermissionsForFile(kRendererID, granted_file);
    560   EXPECT_TRUE(p->HasPermissionsForFile(kRendererID, granted_file,
    561                                        base::File::FLAG_OPEN |
    562                                        base::File::FLAG_READ));
    563   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, granted_file,
    564                                         base::File::FLAG_TEMPORARY));
    565   p->Remove(kRendererID);
    566 
    567   // Grant file permissions for the file to main thread renderer process,
    568   // make sure its worker thread renderer process inherits those.
    569   p->Add(kRendererID);
    570   GrantPermissionsForFile(p, kRendererID, granted_file,
    571                              base::File::FLAG_OPEN |
    572                              base::File::FLAG_READ);
    573   EXPECT_TRUE(p->HasPermissionsForFile(kRendererID, granted_file,
    574                                        base::File::FLAG_OPEN |
    575                                        base::File::FLAG_READ));
    576   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, granted_file,
    577                                        base::File::FLAG_WRITE));
    578   p->AddWorker(kWorkerRendererID, kRendererID);
    579   EXPECT_TRUE(p->HasPermissionsForFile(kWorkerRendererID, granted_file,
    580                                        base::File::FLAG_OPEN |
    581                                        base::File::FLAG_READ));
    582   EXPECT_FALSE(p->HasPermissionsForFile(kWorkerRendererID, granted_file,
    583                                         base::File::FLAG_WRITE));
    584   p->Remove(kRendererID);
    585   EXPECT_FALSE(p->HasPermissionsForFile(kWorkerRendererID, granted_file,
    586                                         base::File::FLAG_OPEN |
    587                                         base::File::FLAG_READ));
    588   p->Remove(kWorkerRendererID);
    589 
    590   p->Add(kRendererID);
    591   GrantPermissionsForFile(p, kRendererID, relative_file,
    592                              base::File::FLAG_OPEN);
    593   EXPECT_FALSE(p->HasPermissionsForFile(kRendererID, relative_file,
    594                                         base::File::FLAG_OPEN));
    595   p->Remove(kRendererID);
    596 }
    597 
    598 TEST_F(ChildProcessSecurityPolicyTest, CanServiceWebUIBindings) {
    599   ChildProcessSecurityPolicyImpl* p =
    600       ChildProcessSecurityPolicyImpl::GetInstance();
    601 
    602   GURL url("chrome://thumb/http://www.google.com/");
    603 
    604   p->Add(kRendererID);
    605 
    606   EXPECT_FALSE(p->HasWebUIBindings(kRendererID));
    607   EXPECT_FALSE(p->CanRequestURL(kRendererID, url));
    608   p->GrantWebUIBindings(kRendererID);
    609   EXPECT_TRUE(p->HasWebUIBindings(kRendererID));
    610   EXPECT_TRUE(p->CanRequestURL(kRendererID, url));
    611 
    612   p->Remove(kRendererID);
    613 }
    614 
    615 TEST_F(ChildProcessSecurityPolicyTest, RemoveRace) {
    616   ChildProcessSecurityPolicyImpl* p =
    617       ChildProcessSecurityPolicyImpl::GetInstance();
    618 
    619   GURL url("file:///etc/passwd");
    620   base::FilePath file(TEST_PATH("/etc/passwd"));
    621 
    622   p->Add(kRendererID);
    623 
    624   p->GrantRequestURL(kRendererID, url);
    625   p->GrantReadFile(kRendererID, file);
    626   p->GrantWebUIBindings(kRendererID);
    627 
    628   EXPECT_TRUE(p->CanRequestURL(kRendererID, url));
    629   EXPECT_TRUE(p->CanReadFile(kRendererID, file));
    630   EXPECT_TRUE(p->HasWebUIBindings(kRendererID));
    631 
    632   p->Remove(kRendererID);
    633 
    634   // Renderers are added and removed on the UI thread, but the policy can be
    635   // queried on the IO thread.  The ChildProcessSecurityPolicy needs to be
    636   // prepared to answer policy questions about renderers who no longer exist.
    637 
    638   // In this case, we default to secure behavior.
    639   EXPECT_FALSE(p->CanRequestURL(kRendererID, url));
    640   EXPECT_FALSE(p->CanReadFile(kRendererID, file));
    641   EXPECT_FALSE(p->HasWebUIBindings(kRendererID));
    642 }
    643 
    644 }  // namespace content
    645