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comparison: security/sandbox/win/src/registry_interception.cc
security/sandbox/win/src/registry_interception.cc
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:d193e9754327 |
|---|---|
| 1 // Copyright (c) 2006-2008 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 "sandbox/win/src/registry_interception.h" | |
| 6 | |
| 7 #include "sandbox/win/src/crosscall_client.h" | |
| 8 #include "sandbox/win/src/ipc_tags.h" | |
| 9 #include "sandbox/win/src/sandbox_factory.h" | |
| 10 #include "sandbox/win/src/sandbox_nt_util.h" | |
| 11 #include "sandbox/win/src/sharedmem_ipc_client.h" | |
| 12 #include "sandbox/win/src/target_services.h" | |
| 13 | |
| 14 namespace sandbox { | |
| 15 | |
| 16 NTSTATUS WINAPI TargetNtCreateKey(NtCreateKeyFunction orig_CreateKey, | |
| 17 PHANDLE key, ACCESS_MASK desired_access, | |
| 18 POBJECT_ATTRIBUTES object_attributes, | |
| 19 ULONG title_index, PUNICODE_STRING class_name, | |
| 20 ULONG create_options, PULONG disposition) { | |
| 21 // Check if the process can create it first. | |
| 22 NTSTATUS status = orig_CreateKey(key, desired_access, object_attributes, | |
| 23 title_index, class_name, create_options, | |
| 24 disposition); | |
| 25 if (NT_SUCCESS(status)) | |
| 26 return status; | |
| 27 | |
| 28 // We don't trust that the IPC can work this early. | |
| 29 if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) | |
| 30 return status; | |
| 31 | |
| 32 do { | |
| 33 if (!ValidParameter(key, sizeof(HANDLE), WRITE)) | |
| 34 break; | |
| 35 | |
| 36 if (disposition && !ValidParameter(disposition, sizeof(ULONG), WRITE)) | |
| 37 break; | |
| 38 | |
| 39 // At this point we don't support class_name. | |
| 40 if (class_name && class_name->Buffer && class_name->Length) | |
| 41 break; | |
| 42 | |
| 43 // We don't support creating link keys, volatile keys and backup/restore. | |
| 44 if (create_options) | |
| 45 break; | |
| 46 | |
| 47 void* memory = GetGlobalIPCMemory(); | |
| 48 if (NULL == memory) | |
| 49 break; | |
| 50 | |
| 51 wchar_t* name; | |
| 52 uint32 attributes = 0; | |
| 53 HANDLE root_directory = 0; | |
| 54 NTSTATUS ret = AllocAndCopyName(object_attributes, &name, &attributes, | |
| 55 &root_directory); | |
| 56 if (!NT_SUCCESS(ret) || NULL == name) | |
| 57 break; | |
| 58 | |
| 59 SharedMemIPCClient ipc(memory); | |
| 60 CrossCallReturn answer = {0}; | |
| 61 | |
| 62 ResultCode code = CrossCall(ipc, IPC_NTCREATEKEY_TAG, name, attributes, | |
| 63 root_directory, desired_access, title_index, | |
| 64 create_options, &answer); | |
| 65 | |
| 66 operator delete(name, NT_ALLOC); | |
| 67 | |
| 68 if (SBOX_ALL_OK != code) | |
| 69 break; | |
| 70 | |
| 71 if (!NT_SUCCESS(answer.nt_status)) | |
| 72 // TODO(nsylvain): We should return answer.nt_status here instead | |
| 73 // of status. We can do this only after we checked the policy. | |
| 74 // otherwise we will returns ACCESS_DENIED for all paths | |
| 75 // that are not specified by a policy, even though your token allows | |
| 76 // access to that path, and the original call had a more meaningful | |
| 77 // error. Bug 4369 | |
| 78 break; | |
| 79 | |
| 80 __try { | |
| 81 *key = answer.handle; | |
| 82 | |
| 83 if (disposition) | |
| 84 *disposition = answer.extended[0].unsigned_int; | |
| 85 | |
| 86 status = answer.nt_status; | |
| 87 } __except(EXCEPTION_EXECUTE_HANDLER) { | |
| 88 break; | |
| 89 } | |
| 90 } while (false); | |
| 91 | |
| 92 return status; | |
| 93 } | |
| 94 | |
| 95 NTSTATUS WINAPI CommonNtOpenKey(NTSTATUS status, PHANDLE key, | |
| 96 ACCESS_MASK desired_access, | |
| 97 POBJECT_ATTRIBUTES object_attributes) { | |
| 98 // We don't trust that the IPC can work this early. | |
| 99 if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) | |
| 100 return status; | |
| 101 | |
| 102 do { | |
| 103 if (!ValidParameter(key, sizeof(HANDLE), WRITE)) | |
| 104 break; | |
| 105 | |
| 106 void* memory = GetGlobalIPCMemory(); | |
| 107 if (NULL == memory) | |
| 108 break; | |
| 109 | |
| 110 wchar_t* name; | |
| 111 uint32 attributes; | |
| 112 HANDLE root_directory; | |
| 113 NTSTATUS ret = AllocAndCopyName(object_attributes, &name, &attributes, | |
| 114 &root_directory); | |
| 115 if (!NT_SUCCESS(ret) || NULL == name) | |
| 116 break; | |
| 117 | |
| 118 SharedMemIPCClient ipc(memory); | |
| 119 CrossCallReturn answer = {0}; | |
| 120 ResultCode code = CrossCall(ipc, IPC_NTOPENKEY_TAG, name, attributes, | |
| 121 root_directory, desired_access, &answer); | |
| 122 | |
| 123 operator delete(name, NT_ALLOC); | |
| 124 | |
| 125 if (SBOX_ALL_OK != code) | |
| 126 break; | |
| 127 | |
| 128 if (!NT_SUCCESS(answer.nt_status)) | |
| 129 // TODO(nsylvain): We should return answer.nt_status here instead | |
| 130 // of status. We can do this only after we checked the policy. | |
| 131 // otherwise we will returns ACCESS_DENIED for all paths | |
| 132 // that are not specified by a policy, even though your token allows | |
| 133 // access to that path, and the original call had a more meaningful | |
| 134 // error. Bug 4369 | |
| 135 break; | |
| 136 | |
| 137 __try { | |
| 138 *key = answer.handle; | |
| 139 status = answer.nt_status; | |
| 140 } __except(EXCEPTION_EXECUTE_HANDLER) { | |
| 141 break; | |
| 142 } | |
| 143 } while (false); | |
| 144 | |
| 145 return status; | |
| 146 } | |
| 147 | |
| 148 NTSTATUS WINAPI TargetNtOpenKey(NtOpenKeyFunction orig_OpenKey, PHANDLE key, | |
| 149 ACCESS_MASK desired_access, | |
| 150 POBJECT_ATTRIBUTES object_attributes) { | |
| 151 // Check if the process can open it first. | |
| 152 NTSTATUS status = orig_OpenKey(key, desired_access, object_attributes); | |
| 153 if (NT_SUCCESS(status)) | |
| 154 return status; | |
| 155 | |
| 156 return CommonNtOpenKey(status, key, desired_access, object_attributes); | |
| 157 } | |
| 158 | |
| 159 NTSTATUS WINAPI TargetNtOpenKeyEx(NtOpenKeyExFunction orig_OpenKeyEx, | |
| 160 PHANDLE key, ACCESS_MASK desired_access, | |
| 161 POBJECT_ATTRIBUTES object_attributes, | |
| 162 ULONG open_options) { | |
| 163 // Check if the process can open it first. | |
| 164 NTSTATUS status = orig_OpenKeyEx(key, desired_access, object_attributes, | |
| 165 open_options); | |
| 166 | |
| 167 // We do not support open_options at this time. The 2 current known values | |
| 168 // are REG_OPTION_CREATE_LINK, to open a symbolic link, and | |
| 169 // REG_OPTION_BACKUP_RESTORE to open the key with special privileges. | |
| 170 if (NT_SUCCESS(status) || open_options != 0) | |
| 171 return status; | |
| 172 | |
| 173 return CommonNtOpenKey(status, key, desired_access, object_attributes); | |
| 174 } | |
| 175 | |
| 176 } // namespace sandbox |
