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878ddf1f | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | Security.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | EFI PEI Core Security services\r | |
19 | \r | |
20 | --*/\r | |
21 | \r | |
22 | #include <PeiMain.h>\r | |
23 | \r | |
24 | EFI_STATUS\r | |
25 | EFIAPI\r | |
26 | SecurityPpiNotifyCallback (\r | |
27 | IN EFI_PEI_SERVICES **PeiServices,\r | |
28 | IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,\r | |
29 | IN VOID *Ppi\r | |
30 | );\r | |
31 | \r | |
32 | static EFI_PEI_NOTIFY_DESCRIPTOR mNotifyList = {\r | |
33 | EFI_PEI_PPI_DESCRIPTOR_NOTIFY_DISPATCH | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,\r | |
34 | &gEfiPeiSecurityPpiGuid,\r | |
35 | SecurityPpiNotifyCallback\r | |
36 | };\r | |
37 | \r | |
38 | VOID\r | |
39 | InitializeSecurityServices (\r | |
40 | IN EFI_PEI_SERVICES **PeiServices,\r | |
41 | IN PEI_CORE_INSTANCE *OldCoreData\r | |
42 | )\r | |
43 | /*++\r | |
44 | \r | |
45 | Routine Description:\r | |
46 | \r | |
47 | Initialize the security services.\r | |
48 | \r | |
49 | Arguments:\r | |
50 | \r | |
51 | PeiServices - The PEI core services table.\r | |
52 | OldCoreData - Pointer to the old core data.\r | |
53 | NULL if being run in non-permament memory mode.\r | |
54 | Returns:\r | |
55 | \r | |
56 | None\r | |
57 | \r | |
58 | --*/\r | |
59 | {\r | |
60 | if (OldCoreData == NULL) {\r | |
61 | PeiCoreNotifyPpi (&mNotifyList);\r | |
62 | }\r | |
63 | return;\r | |
64 | }\r | |
65 | \r | |
66 | EFI_STATUS\r | |
67 | EFIAPI\r | |
68 | SecurityPpiNotifyCallback (\r | |
69 | IN EFI_PEI_SERVICES **PeiServices,\r | |
70 | IN EFI_PEI_NOTIFY_DESCRIPTOR *NotifyDescriptor,\r | |
71 | IN VOID *Ppi\r | |
72 | )\r | |
73 | /*++\r | |
74 | \r | |
75 | Routine Description:\r | |
76 | \r | |
77 | Provide a callback for when the security PPI is installed.\r | |
78 | \r | |
79 | Arguments:\r | |
80 | \r | |
81 | PeiServices - The PEI core services table.\r | |
82 | NotifyDescriptor - The descriptor for the notification event.\r | |
83 | Ppi - Pointer to the PPI in question.\r | |
84 | \r | |
85 | Returns:\r | |
86 | \r | |
87 | EFI_SUCCESS - The function is successfully processed.\r | |
88 | \r | |
89 | --*/\r | |
90 | {\r | |
91 | PEI_CORE_INSTANCE *PrivateData;\r | |
92 | \r | |
93 | //\r | |
94 | // Get PEI Core private data\r | |
95 | //\r | |
96 | PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);\r | |
97 | \r | |
98 | //\r | |
99 | // If there isn't a security PPI installed, use the one from notification\r | |
100 | //\r | |
101 | if (PrivateData->PrivateSecurityPpi == NULL) {\r | |
102 | PrivateData->PrivateSecurityPpi = (EFI_PEI_SECURITY_PPI *)Ppi;\r | |
103 | }\r | |
104 | return EFI_SUCCESS;\r | |
105 | }\r | |
106 | \r | |
107 | EFI_STATUS\r | |
108 | VerifyPeim (\r | |
109 | IN EFI_PEI_SERVICES **PeiServices,\r | |
110 | IN EFI_FFS_FILE_HEADER *CurrentPeimAddress\r | |
111 | )\r | |
112 | /*++\r | |
113 | \r | |
114 | Routine Description:\r | |
115 | \r | |
116 | Provide a callout to the security verification service.\r | |
117 | \r | |
118 | Arguments:\r | |
119 | \r | |
120 | PeiServices - The PEI core services table.\r | |
121 | CurrentPeimAddress - Pointer to the Firmware File under investigation.\r | |
122 | \r | |
123 | Returns:\r | |
124 | \r | |
125 | EFI_SUCCESS - Image is OK\r | |
126 | EFI_SECURITY_VIOLATION - Image is illegal\r | |
127 | \r | |
128 | --*/\r | |
129 | {\r | |
130 | PEI_CORE_INSTANCE *PrivateData;\r | |
131 | EFI_STATUS Status;\r | |
132 | UINT32 AuthenticationStatus;\r | |
133 | BOOLEAN StartCrisisRecovery;\r | |
134 | \r | |
135 | //\r | |
136 | // Set a default authentication state\r | |
137 | //\r | |
138 | AuthenticationStatus = 0;\r | |
139 | \r | |
140 | //\r | |
141 | // get security PPI instance from PEI private data\r | |
142 | //\r | |
143 | PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);\r | |
144 | \r | |
145 | if (PrivateData->PrivateSecurityPpi == NULL) {\r | |
146 | Status = EFI_NOT_FOUND;\r | |
147 | } else {\r | |
148 | //\r | |
149 | // Check to see if the image is OK\r | |
150 | //\r | |
151 | Status = PrivateData->PrivateSecurityPpi->AuthenticationState (\r | |
152 | PeiServices,\r | |
153 | PrivateData->PrivateSecurityPpi,\r | |
154 | AuthenticationStatus,\r | |
155 | CurrentPeimAddress,\r | |
156 | &StartCrisisRecovery\r | |
157 | );\r | |
158 | if (StartCrisisRecovery) {\r | |
159 | Status = EFI_SECURITY_VIOLATION;\r | |
160 | }\r | |
161 | }\r | |
162 | return Status;\r | |
163 | }\r | |
164 | \r | |
165 | \r | |
166 | EFI_STATUS\r | |
167 | VerifyFv (\r | |
168 | IN EFI_FIRMWARE_VOLUME_HEADER *CurrentFvAddress\r | |
169 | )\r | |
170 | /*++\r | |
171 | \r | |
172 | Routine Description:\r | |
173 | \r | |
174 | Verify a Firmware volume\r | |
175 | \r | |
176 | Arguments:\r | |
177 | \r | |
178 | CurrentFvAddress - Pointer to the current Firmware Volume under consideration\r | |
179 | \r | |
180 | Returns:\r | |
181 | \r | |
182 | EFI_SUCCESS - Firmware Volume is legal\r | |
183 | EFI_SECURITY_VIOLATION - Firmware Volume fails integrity test\r | |
184 | \r | |
185 | --*/\r | |
186 | {\r | |
187 | //\r | |
188 | // Right now just pass the test. Future can authenticate and/or check the\r | |
189 | // FV-header or other metric for goodness of binary.\r | |
190 | //\r | |
191 | return EFI_SUCCESS;\r | |
192 | }\r |