1 /** @file 2 This library class defines a set of interfaces to abstract the policy of 3 security measurement by managing the different security measurement services. 4 The library instances can be implemented according to the different security policy. 5 6 Copyright (c) 2009 - 2012, Intel Corporation. All rights reserved.<BR> 7 This program and the accompanying materials are licensed and made available under 8 the terms and conditions of the BSD License that accompanies this distribution. 9 The full text of the license may be found at 10 http://opensource.org/licenses/bsd-license.php. 11 12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 14 15 **/ 16 17 #ifndef __SECURITY_MANAGEMENT_LIB_H__ 18 #define __SECURITY_MANAGEMENT_LIB_H__ 19 20 // 21 // Authentication Operation defintions for User Identity (UID), Measured and Secure boot. 22 // 23 #define EFI_AUTH_OPERATION_NONE 0x00 24 #define EFI_AUTH_OPERATION_VERIFY_IMAGE 0x01 25 #define EFI_AUTH_OPERATION_DEFER_IMAGE_LOAD 0x02 26 #define EFI_AUTH_OPERATION_MEASURE_IMAGE 0x04 27 #define EFI_AUTH_OPERATION_CONNECT_POLICY 0x08 28 // 29 // Authentication State Operation will check the authentication status of a file. 30 // 31 #define EFI_AUTH_OPERATION_AUTHENTICATION_STATE 0x10 32 33 /// 34 /// Image buffer is required by the security handler. 35 /// 36 #define EFI_AUTH_OPERATION_IMAGE_REQUIRED 0x80000000 37 38 /** 39 The security handler is used to abstract platform-specific policy 40 from the DXE core response to an attempt to use a file that returns a 41 given status for the authentication check from the section extraction protocol. 42 43 The possible responses in a given SAP implementation may include locking 44 flash upon failure to authenticate, attestation logging for all signed drivers, 45 and other exception operations. The File parameter allows for possible logging 46 within the SAP of the driver. 47 48 If File is NULL, then EFI_INVALID_PARAMETER is returned. 49 50 If the file specified by File with an authentication status specified by 51 AuthenticationStatus is safe for the DXE Core to use, then EFI_SUCCESS is returned. 52 53 If the file specified by File with an authentication status specified by 54 AuthenticationStatus is not safe for the DXE Core to use under any circumstances, 55 then EFI_ACCESS_DENIED is returned. 56 57 If the file specified by File with an authentication status specified by 58 AuthenticationStatus is not safe for the DXE Core to use at the time, but it 59 might be possible to use it at a future time, then EFI_SECURITY_VIOLATION is 60 returned. 61 62 FileBuffer will be NULL and FileSize will be 0 if the handler being called 63 did not set EFI_AUTH_OPERATION_IMAGE_REQUIRED when it was registered. 64 65 @param[in] AuthenticationStatus 66 The authentication status returned from the security 67 measurement services for the input file. 68 @param[in] File The pointer to the device path of the file that is 69 being dispatched. This will optionally be used for logging. 70 @param[in] FileBuffer The file buffer matches the input file device path. 71 @param[in] FileSize The size of File buffer matches the input file device path. 72 73 @retval EFI_SUCCESS The file specified by File did authenticate, and the 74 platform policy dictates that the DXE Core may use File. 75 @retval EFI_INVALID_PARAMETER The file is NULL. 76 @retval EFI_SECURITY_VIOLATION The file specified by File did not authenticate, and 77 the platform policy dictates that File should be placed 78 in the untrusted state. A file may be promoted from 79 the untrusted to the trusted state at a future time 80 with a call to the Trust() DXE Service. 81 @retval EFI_ACCESS_DENIED The file specified by File did not authenticate, and 82 the platform policy dictates that File should not be 83 used for any purpose. 84 85 **/ 86 typedef 87 EFI_STATUS 88 (EFIAPI *SECURITY_FILE_AUTHENTICATION_STATE_HANDLER)( 89 IN OUT UINT32 AuthenticationStatus, 90 IN CONST EFI_DEVICE_PATH_PROTOCOL *File, 91 IN VOID *FileBuffer, 92 IN UINTN FileSize 93 ); 94 95 /** 96 Register security measurement handler with its operation type. Different 97 handlers with the same operation can all be registered. 98 99 If SecurityHandler is NULL, then ASSERT(). 100 If no enough resources available to register new handler, then ASSERT(). 101 If AuthenticationOperation is not recongnized, then ASSERT(). 102 If the previous register handler can't be executed before the later register handler, then ASSERT(). 103 104 @param[in] SecurityHandler The security measurement service handler to be registered. 105 @param[in] AuthenticationOperation Theoperation type is specified for the registered handler. 106 107 @retval EFI_SUCCESS The handlers were registered successfully. 108 **/ 109 EFI_STATUS 110 EFIAPI 111 RegisterSecurityHandler ( 112 IN SECURITY_FILE_AUTHENTICATION_STATE_HANDLER SecurityHandler, 113 IN UINT32 AuthenticationOperation 114 ); 115 116 /** 117 Execute registered handlers until one returns an error and that error is returned. 118 If none of the handlers return an error, then EFI_SUCCESS is returned. 119 120 Before exectue handler, get the image buffer by file device path if a handler 121 requires the image file. And return the image buffer to each handler when exectue handler. 122 123 The handlers are executed in same order to their registered order. 124 125 @param[in] AuthenticationStatus 126 This is the authentication type returned from the Section 127 Extraction protocol. See the Section Extraction Protocol 128 Specification for details on this type. 129 @param[in] FilePath This is a pointer to the device path of the file that is 130 being dispatched. This will optionally be used for logging. 131 132 @retval EFI_SUCCESS The file specified by File authenticated when more 133 than one security handler services were registered, 134 or the file did not authenticate when no security 135 handler service was registered. And the platform policy 136 dictates that the DXE Core may use File. 137 @retval EFI_INVALID_PARAMETER File is NULL. 138 @retval EFI_SECURITY_VIOLATION The file specified by File did not authenticate, and 139 the platform policy dictates that File should be placed 140 in the untrusted state. A file may be promoted from 141 the untrusted to the trusted state at a future time 142 with a call to the Trust() DXE Service. 143 @retval EFI_ACCESS_DENIED The file specified by File did not authenticate, and 144 the platform policy dictates that File should not be 145 used for any purpose. 146 **/ 147 EFI_STATUS 148 EFIAPI 149 ExecuteSecurityHandlers ( 150 IN UINT32 AuthenticationStatus, 151 IN CONST EFI_DEVICE_PATH_PROTOCOL *FilePath 152 ); 153 154 /** 155 The security handler is used to abstracts security-specific functions from the DXE 156 Foundation of UEFI Image Verification, Trusted Computing Group (TCG) measured boot, 157 User Identity policy for image loading and consoles, and for purposes of 158 handling GUIDed section encapsulations. 159 160 @param[in] AuthenticationStatus 161 The authentication status for the input file. 162 @param[in] File The pointer to the device path of the file that is 163 being dispatched. This will optionally be used for logging. 164 @param[in] FileBuffer A pointer to the buffer with the UEFI file image 165 @param[in] FileSize The size of File buffer. 166 @param[in] BootPolicy A boot policy that was used to call LoadImage() UEFI service. 167 168 @retval EFI_SUCCESS The file specified by DevicePath and non-NULL 169 FileBuffer did authenticate, and the platform policy dictates 170 that the DXE Foundation may use the file. 171 @retval EFI_SUCCESS The device path specified by NULL device path DevicePath 172 and non-NULL FileBuffer did authenticate, and the platform 173 policy dictates that the DXE Foundation may execute the image in 174 FileBuffer. 175 @retval EFI_SUCCESS FileBuffer is NULL and current user has permission to start 176 UEFI device drivers on the device path specified by DevicePath. 177 @retval EFI_SECURITY_VIOLATION The file specified by DevicePath and FileBuffer did not 178 authenticate, and the platform policy dictates that the file should be 179 placed in the untrusted state. The image has been added to the file 180 execution table. 181 @retval EFI_ACCESS_DENIED The file specified by File and FileBuffer did not 182 authenticate, and the platform policy dictates that the DXE 183 Foundation may not use File. 184 @retval EFI_SECURITY_VIOLATION FileBuffer is NULL and the user has no 185 permission to start UEFI device drivers on the device path specified 186 by DevicePath. 187 @retval EFI_SECURITY_VIOLATION FileBuffer is not NULL and the user has no permission to load 188 drivers from the device path specified by DevicePath. The 189 image has been added into the list of the deferred images. 190 **/ 191 typedef 192 EFI_STATUS 193 (EFIAPI *SECURITY2_FILE_AUTHENTICATION_HANDLER) ( 194 IN UINT32 AuthenticationStatus, 195 IN CONST EFI_DEVICE_PATH_PROTOCOL *File, 196 IN VOID *FileBuffer, 197 IN UINTN FileSize, 198 IN BOOLEAN BootPolicy 199 ); 200 201 /** 202 Register security measurement handler with its operation type. Different 203 handlers with the same operation can all be registered. 204 205 If SecurityHandler is NULL, then ASSERT(). 206 If no enough resources available to register new handler, then ASSERT(). 207 If AuthenticationOperation is not recongnized, then ASSERT(). 208 If AuthenticationOperation is EFI_AUTH_OPERATION_NONE, then ASSERT(). 209 If the previous register handler can't be executed before the later register handler, then ASSERT(). 210 211 @param[in] Security2Handler The security measurement service handler to be registered. 212 @param[in] AuthenticationOperation The operation type is specified for the registered handler. 213 214 @retval EFI_SUCCESS The handlers were registered successfully. 215 **/ 216 EFI_STATUS 217 EFIAPI 218 RegisterSecurity2Handler ( 219 IN SECURITY2_FILE_AUTHENTICATION_HANDLER Security2Handler, 220 IN UINT32 AuthenticationOperation 221 ); 222 223 /** 224 Execute registered handlers based on input AuthenticationOperation until 225 one returns an error and that error is returned. 226 227 If none of the handlers return an error, then EFI_SUCCESS is returned. 228 The handlers those satisfy AuthenticationOperation will only be executed. 229 The handlers are executed in same order to their registered order. 230 231 @param[in] AuthenticationOperation 232 The operation type specifies which handlers will be executed. 233 @param[in] AuthenticationStatus 234 The authentication status for the input file. 235 @param[in] File This is a pointer to the device path of the file that is 236 being dispatched. This will optionally be used for logging. 237 @param[in] FileBuffer A pointer to the buffer with the UEFI file image 238 @param[in] FileSize The size of File buffer. 239 @param[in] BootPolicy A boot policy that was used to call LoadImage() UEFI service. 240 241 @retval EFI_SUCCESS The file specified by DevicePath and non-NULL 242 FileBuffer did authenticate, and the platform policy dictates 243 that the DXE Foundation may use the file. 244 @retval EFI_SUCCESS The device path specified by NULL device path DevicePath 245 and non-NULL FileBuffer did authenticate, and the platform 246 policy dictates that the DXE Foundation may execute the image in 247 FileBuffer. 248 @retval EFI_SUCCESS FileBuffer is NULL and current user has permission to start 249 UEFI device drivers on the device path specified by DevicePath. 250 @retval EFI_SECURITY_VIOLATION The file specified by DevicePath and FileBuffer did not 251 authenticate, and the platform policy dictates that the file should be 252 placed in the untrusted state. The image has been added to the file 253 execution table. 254 @retval EFI_ACCESS_DENIED The file specified by File and FileBuffer did not 255 authenticate, and the platform policy dictates that the DXE 256 Foundation may not use File. 257 @retval EFI_SECURITY_VIOLATION FileBuffer is NULL and the user has no 258 permission to start UEFI device drivers on the device path specified 259 by DevicePath. 260 @retval EFI_SECURITY_VIOLATION FileBuffer is not NULL and the user has no permission to load 261 drivers from the device path specified by DevicePath. The 262 image has been added into the list of the deferred images. 263 @retval EFI_INVALID_PARAMETER File and FileBuffer are both NULL. 264 **/ 265 EFI_STATUS 266 EFIAPI 267 ExecuteSecurity2Handlers ( 268 IN UINT32 AuthenticationOperation, 269 IN UINT32 AuthenticationStatus, 270 IN CONST EFI_DEVICE_PATH_PROTOCOL *File, 271 IN VOID *FileBuffer, 272 IN UINTN FileSize, 273 IN BOOLEAN BootPolicy 274 ); 275 276 #endif 277
