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| 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 <stdint.h> | |
| 8 | |
| 9 #include "sandbox/win/src/crosscall_client.h" | |
| 10 #include "sandbox/win/src/ipc_tags.h" | |
| 11 #include "sandbox/win/src/policy_params.h" | |
| 12 #include "sandbox/win/src/policy_target.h" | |
| 13 #include "sandbox/win/src/sandbox_factory.h" | |
| 14 #include "sandbox/win/src/sandbox_nt_util.h" | |
| 15 #include "sandbox/win/src/sharedmem_ipc_client.h" | |
| 16 #include "sandbox/win/src/target_services.h" | |
| 17 | |
| 18 namespace sandbox { | |
| 19 | |
| 20 NTSTATUS WINAPI TargetNtCreateKey(NtCreateKeyFunction orig_CreateKey, | |
| 21 PHANDLE key, ACCESS_MASK desired_access, | |
| 22 POBJECT_ATTRIBUTES object_attributes, | |
| 23 ULONG title_index, PUNICODE_STRING class_name, | |
| 24 ULONG create_options, PULONG disposition) { | |
| 25 // Check if the process can create it first. | |
| 26 NTSTATUS status = orig_CreateKey(key, desired_access, object_attributes, | |
| 27 title_index, class_name, create_options, | |
| 28 disposition); | |
| 29 if (NT_SUCCESS(status)) | |
| 30 return status; | |
| 31 | |
| 32 // We don't trust that the IPC can work this early. | |
| 33 if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) | |
| 34 return status; | |
| 35 | |
| 36 do { | |
| 37 if (!ValidParameter(key, sizeof(HANDLE), WRITE)) | |
| 38 break; | |
| 39 | |
| 40 if (disposition && !ValidParameter(disposition, sizeof(ULONG), WRITE)) | |
| 41 break; | |
| 42 | |
| 43 // At this point we don't support class_name. | |
| 44 if (class_name && class_name->Buffer && class_name->Length) | |
| 45 break; | |
| 46 | |
| 47 // We don't support creating link keys, volatile keys and backup/restore. | |
| 48 if (create_options) | |
| 49 break; | |
| 50 | |
| 51 void* memory = GetGlobalIPCMemory(); | |
| 52 if (NULL == memory) | |
| 53 break; | |
| 54 | |
| 55 wchar_t* name; | |
| 56 uint32_t attributes = 0; | |
| 57 HANDLE root_directory = 0; | |
| 58 NTSTATUS ret = AllocAndCopyName(object_attributes, &name, &attributes, | |
| 59 &root_directory); | |
| 60 if (!NT_SUCCESS(ret) || NULL == name) | |
| 61 break; | |
| 62 | |
| 63 uint32_t desired_access_uint32 = desired_access; | |
| 64 CountedParameterSet<OpenKey> params; | |
| 65 params[OpenKey::ACCESS] = ParamPickerMake(desired_access_uint32); | |
| 66 | |
| 67 wchar_t* full_name = NULL; | |
| 68 | |
| 69 if (root_directory) { | |
| 70 ret = sandbox::AllocAndGetFullPath(root_directory, name, &full_name); | |
| 71 if (!NT_SUCCESS(ret) || NULL == full_name) | |
| 72 break; | |
| 73 params[OpenKey::NAME] = ParamPickerMake(full_name); | |
| 74 } else { | |
| 75 params[OpenKey::NAME] = ParamPickerMake(name); | |
| 76 } | |
| 77 | |
| 78 bool query_broker = QueryBroker(IPC_NTCREATEKEY_TAG, params.GetBase()); | |
| 79 | |
| 80 if (full_name != NULL) | |
| 81 operator delete(full_name, NT_ALLOC); | |
| 82 | |
| 83 if (!query_broker) | |
| 84 break; | |
| 85 | |
| 86 SharedMemIPCClient ipc(memory); | |
| 87 CrossCallReturn answer = {0}; | |
| 88 | |
| 89 ResultCode code = CrossCall(ipc, IPC_NTCREATEKEY_TAG, name, attributes, | |
| 90 root_directory, desired_access, title_index, | |
| 91 create_options, &answer); | |
| 92 | |
| 93 operator delete(name, NT_ALLOC); | |
| 94 | |
| 95 if (SBOX_ALL_OK != code) | |
| 96 break; | |
| 97 | |
| 98 if (!NT_SUCCESS(answer.nt_status)) | |
| 99 // TODO(nsylvain): We should return answer.nt_status here instead | |
| 100 // of status. We can do this only after we checked the policy. | |
| 101 // otherwise we will returns ACCESS_DENIED for all paths | |
| 102 // that are not specified by a policy, even though your token allows | |
| 103 // access to that path, and the original call had a more meaningful | |
| 104 // error. Bug 4369 | |
| 105 break; | |
| 106 | |
| 107 __try { | |
| 108 *key = answer.handle; | |
| 109 | |
| 110 if (disposition) | |
| 111 *disposition = answer.extended[0].unsigned_int; | |
| 112 | |
| 113 status = answer.nt_status; | |
| 114 } __except(EXCEPTION_EXECUTE_HANDLER) { | |
| 115 break; | |
| 116 } | |
| 117 } while (false); | |
| 118 | |
| 119 return status; | |
| 120 } | |
| 121 | |
| 122 NTSTATUS WINAPI CommonNtOpenKey(NTSTATUS status, PHANDLE key, | |
| 123 ACCESS_MASK desired_access, | |
| 124 POBJECT_ATTRIBUTES object_attributes) { | |
| 125 // We don't trust that the IPC can work this early. | |
| 126 if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) | |
| 127 return status; | |
| 128 | |
| 129 do { | |
| 130 if (!ValidParameter(key, sizeof(HANDLE), WRITE)) | |
| 131 break; | |
| 132 | |
| 133 void* memory = GetGlobalIPCMemory(); | |
| 134 if (NULL == memory) | |
| 135 break; | |
| 136 | |
| 137 wchar_t* name; | |
| 138 uint32_t attributes; | |
| 139 HANDLE root_directory; | |
| 140 NTSTATUS ret = AllocAndCopyName(object_attributes, &name, &attributes, | |
| 141 &root_directory); | |
| 142 if (!NT_SUCCESS(ret) || NULL == name) | |
| 143 break; | |
| 144 | |
| 145 uint32_t desired_access_uint32 = desired_access; | |
| 146 CountedParameterSet<OpenKey> params; | |
| 147 params[OpenKey::ACCESS] = ParamPickerMake(desired_access_uint32); | |
| 148 | |
| 149 wchar_t* full_name = NULL; | |
| 150 | |
| 151 if (root_directory) { | |
| 152 ret = sandbox::AllocAndGetFullPath(root_directory, name, &full_name); | |
| 153 if (!NT_SUCCESS(ret) || NULL == full_name) | |
| 154 break; | |
| 155 params[OpenKey::NAME] = ParamPickerMake(full_name); | |
| 156 } else { | |
| 157 params[OpenKey::NAME] = ParamPickerMake(name); | |
| 158 } | |
| 159 | |
| 160 bool query_broker = QueryBroker(IPC_NTOPENKEY_TAG, params.GetBase()); | |
| 161 | |
| 162 if (full_name != NULL) | |
| 163 operator delete(full_name, NT_ALLOC); | |
| 164 | |
| 165 if (!query_broker) | |
| 166 break; | |
| 167 | |
| 168 SharedMemIPCClient ipc(memory); | |
| 169 CrossCallReturn answer = {0}; | |
| 170 ResultCode code = CrossCall(ipc, IPC_NTOPENKEY_TAG, name, attributes, | |
| 171 root_directory, desired_access, &answer); | |
| 172 | |
| 173 operator delete(name, NT_ALLOC); | |
| 174 | |
| 175 if (SBOX_ALL_OK != code) | |
| 176 break; | |
| 177 | |
| 178 if (!NT_SUCCESS(answer.nt_status)) | |
| 179 // TODO(nsylvain): We should return answer.nt_status here instead | |
| 180 // of status. We can do this only after we checked the policy. | |
| 181 // otherwise we will returns ACCESS_DENIED for all paths | |
| 182 // that are not specified by a policy, even though your token allows | |
| 183 // access to that path, and the original call had a more meaningful | |
| 184 // error. Bug 4369 | |
| 185 break; | |
| 186 | |
| 187 __try { | |
| 188 *key = answer.handle; | |
| 189 status = answer.nt_status; | |
| 190 } __except(EXCEPTION_EXECUTE_HANDLER) { | |
| 191 break; | |
| 192 } | |
| 193 } while (false); | |
| 194 | |
| 195 return status; | |
| 196 } | |
| 197 | |
| 198 NTSTATUS WINAPI TargetNtOpenKey(NtOpenKeyFunction orig_OpenKey, PHANDLE key, | |
| 199 ACCESS_MASK desired_access, | |
| 200 POBJECT_ATTRIBUTES object_attributes) { | |
| 201 // Check if the process can open it first. | |
| 202 NTSTATUS status = orig_OpenKey(key, desired_access, object_attributes); | |
| 203 if (NT_SUCCESS(status)) | |
| 204 return status; | |
| 205 | |
| 206 return CommonNtOpenKey(status, key, desired_access, object_attributes); | |
| 207 } | |
| 208 | |
| 209 NTSTATUS WINAPI TargetNtOpenKeyEx(NtOpenKeyExFunction orig_OpenKeyEx, | |
| 210 PHANDLE key, ACCESS_MASK desired_access, | |
| 211 POBJECT_ATTRIBUTES object_attributes, | |
| 212 ULONG open_options) { | |
| 213 // Check if the process can open it first. | |
| 214 NTSTATUS status = orig_OpenKeyEx(key, desired_access, object_attributes, | |
| 215 open_options); | |
| 216 | |
| 217 // We do not support open_options at this time. The 2 current known values | |
| 218 // are REG_OPTION_CREATE_LINK, to open a symbolic link, and | |
| 219 // REG_OPTION_BACKUP_RESTORE to open the key with special privileges. | |
| 220 if (NT_SUCCESS(status) || open_options != 0) | |
| 221 return status; | |
| 222 | |
| 223 return CommonNtOpenKey(status, key, desired_access, object_attributes); | |
| 224 } | |
| 225 | |
| 226 } // namespace sandbox | |
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Chromium Code Reviews
Issue 1851213002:
Remove sandbox on Windows. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master