]>
Commit | Line | Data |
---|---|---|
8c71ec8f | 1 | /** @file\r |
2 | Helper functions for SecureBoot configuration module.\r | |
3 | \r | |
4 | Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include "SecureBootConfigImpl.h"\r | |
16 | \r | |
17 | /**\r | |
18 | Read file content into BufferPtr, the size of the allocate buffer \r | |
19 | is *FileSize plus AddtionAllocateSize.\r | |
20 | \r | |
21 | @param[in] FileHandle The file to be read.\r | |
22 | @param[in, out] BufferPtr Pointers to the pointer of allocated buffer.\r | |
23 | @param[out] FileSize Size of input file\r | |
24 | @param[in] AddtionAllocateSize Addtion size the buffer need to be allocated. \r | |
25 | In case the buffer need to contain others besides the file content.\r | |
26 | \r | |
27 | @retval EFI_SUCCESS The file was read into the buffer.\r | |
28 | @retval EFI_INVALID_PARAMETER A parameter was invalid.\r | |
29 | @retval EFI_OUT_OF_RESOURCES A memory allocation failed.\r | |
30 | @retval others Unexpected error.\r | |
31 | \r | |
32 | **/\r | |
33 | EFI_STATUS\r | |
34 | ReadFileContent (\r | |
35 | IN EFI_FILE_HANDLE FileHandle,\r | |
36 | IN OUT VOID **BufferPtr,\r | |
37 | OUT UINTN *FileSize,\r | |
38 | IN UINTN AddtionAllocateSize\r | |
39 | )\r | |
40 | \r | |
41 | {\r | |
42 | UINTN BufferSize;\r | |
43 | UINT64 SourceFileSize;\r | |
44 | VOID *Buffer;\r | |
45 | EFI_STATUS Status;\r | |
46 | \r | |
47 | if ((FileHandle == NULL) || (FileSize == NULL)) {\r | |
48 | return EFI_INVALID_PARAMETER;\r | |
49 | }\r | |
50 | \r | |
51 | Buffer = NULL;\r | |
52 | \r | |
53 | //\r | |
54 | // Get the file size\r | |
55 | //\r | |
56 | Status = FileHandle->SetPosition (FileHandle, (UINT64) -1);\r | |
57 | if (EFI_ERROR (Status)) {\r | |
58 | goto ON_EXIT;\r | |
59 | }\r | |
60 | \r | |
61 | Status = FileHandle->GetPosition (FileHandle, &SourceFileSize);\r | |
62 | if (EFI_ERROR (Status)) {\r | |
63 | goto ON_EXIT;\r | |
64 | }\r | |
65 | \r | |
66 | Status = FileHandle->SetPosition (FileHandle, 0);\r | |
67 | if (EFI_ERROR (Status)) {\r | |
68 | goto ON_EXIT;\r | |
69 | }\r | |
70 | \r | |
71 | BufferSize = (UINTN) SourceFileSize + AddtionAllocateSize;\r | |
72 | Buffer = AllocateZeroPool(BufferSize);\r | |
73 | if (Buffer == NULL) {\r | |
74 | return EFI_OUT_OF_RESOURCES;\r | |
75 | }\r | |
76 | \r | |
77 | BufferSize = (UINTN) SourceFileSize;\r | |
78 | *FileSize = BufferSize;\r | |
79 | \r | |
80 | Status = FileHandle->Read (FileHandle, &BufferSize, Buffer);\r | |
81 | if (EFI_ERROR (Status) || BufferSize != *FileSize) {\r | |
82 | FreePool (Buffer);\r | |
83 | Buffer = NULL;\r | |
84 | Status = EFI_BAD_BUFFER_SIZE;\r | |
85 | goto ON_EXIT;\r | |
86 | }\r | |
87 | \r | |
88 | ON_EXIT:\r | |
89 | \r | |
90 | *BufferPtr = Buffer;\r | |
91 | return Status;\r | |
92 | }\r | |
93 | \r | |
94 | /**\r | |
95 | Close an open file handle.\r | |
96 | \r | |
97 | @param[in] FileHandle The file handle to close.\r | |
98 | \r | |
99 | **/\r | |
100 | VOID\r | |
101 | CloseFile (\r | |
102 | IN EFI_FILE_HANDLE FileHandle\r | |
103 | )\r | |
104 | {\r | |
105 | if (FileHandle != NULL) {\r | |
106 | FileHandle->Close (FileHandle); \r | |
107 | }\r | |
108 | }\r | |
109 | \r | |
110 | /**\r | |
111 | Convert a nonnegative integer to an octet string of a specified length.\r | |
112 | \r | |
113 | @param[in] Integer Pointer to the nonnegative integer to be converted\r | |
114 | @param[in] IntSizeInWords Length of integer buffer in words\r | |
115 | @param[out] OctetString Converted octet string of the specified length \r | |
116 | @param[in] OSSizeInBytes Intended length of resulting octet string in bytes\r | |
117 | \r | |
118 | Returns:\r | |
119 | \r | |
120 | @retval EFI_SUCCESS Data conversion successfully\r | |
121 | @retval EFI_BUFFER_TOOL_SMALL Buffer is too small for output string\r | |
122 | \r | |
123 | **/\r | |
124 | EFI_STATUS\r | |
125 | EFIAPI\r | |
126 | Int2OctStr (\r | |
127 | IN CONST UINTN *Integer,\r | |
128 | IN UINTN IntSizeInWords,\r | |
129 | OUT UINT8 *OctetString,\r | |
130 | IN UINTN OSSizeInBytes\r | |
131 | )\r | |
132 | {\r | |
133 | CONST UINT8 *Ptr1;\r | |
134 | UINT8 *Ptr2;\r | |
135 | \r | |
136 | for (Ptr1 = (CONST UINT8 *)Integer, Ptr2 = OctetString + OSSizeInBytes - 1;\r | |
137 | Ptr1 < (UINT8 *)(Integer + IntSizeInWords) && Ptr2 >= OctetString;\r | |
138 | Ptr1++, Ptr2--) {\r | |
139 | *Ptr2 = *Ptr1;\r | |
140 | }\r | |
141 | \r | |
142 | for (; Ptr1 < (CONST UINT8 *)(Integer + IntSizeInWords) && *Ptr1 == 0; Ptr1++);\r | |
143 | \r | |
144 | if (Ptr1 < (CONST UINT8 *)(Integer + IntSizeInWords)) {\r | |
145 | return EFI_BUFFER_TOO_SMALL;\r | |
146 | }\r | |
147 | \r | |
148 | if (Ptr2 >= OctetString) {\r | |
149 | ZeroMem (OctetString, Ptr2 - OctetString + 1);\r | |
150 | }\r | |
151 | \r | |
152 | return EFI_SUCCESS;\r | |
153 | }\r | |
154 | \r | |
155 | \r | |
156 | \r | |
157 | /**\r | |
158 | Convert a String to Guid Value.\r | |
159 | \r | |
160 | @param[in] Str Specifies the String to be converted.\r | |
161 | @param[in] StrLen Number of Unicode Characters of String (exclusive \0)\r | |
162 | @param[out] Guid Return the result Guid value.\r | |
163 | \r | |
164 | @retval EFI_SUCCESS The operation is finished successfully.\r | |
165 | @retval EFI_NOT_FOUND Invalid string.\r | |
166 | \r | |
167 | **/\r | |
168 | EFI_STATUS\r | |
169 | StringToGuid (\r | |
170 | IN CHAR16 *Str, \r | |
171 | IN UINTN StrLen, \r | |
172 | OUT EFI_GUID *Guid\r | |
173 | )\r | |
174 | {\r | |
175 | CHAR16 *PtrBuffer;\r | |
176 | CHAR16 *PtrPosition;\r | |
177 | UINT16 *Buffer;\r | |
178 | UINTN Data;\r | |
179 | UINTN Index;\r | |
180 | UINT16 Digits[3];\r | |
181 | \r | |
182 | Buffer = (CHAR16 *) AllocateZeroPool (sizeof (CHAR16) * (StrLen + 1));\r | |
183 | if (Buffer == NULL) {\r | |
184 | return EFI_OUT_OF_RESOURCES;\r | |
185 | }\r | |
186 | \r | |
187 | StrCpy (Buffer, Str);\r | |
188 | \r | |
189 | //\r | |
190 | // Data1\r | |
191 | //\r | |
192 | PtrBuffer = Buffer;\r | |
193 | PtrPosition = PtrBuffer; \r | |
194 | while (*PtrBuffer != L'\0') {\r | |
195 | if (*PtrBuffer == L'-') {\r | |
196 | break;\r | |
197 | }\r | |
198 | PtrBuffer++;\r | |
199 | }\r | |
200 | if (*PtrBuffer == L'\0') {\r | |
201 | FreePool (Buffer);\r | |
202 | return EFI_NOT_FOUND;\r | |
203 | }\r | |
204 | \r | |
205 | *PtrBuffer = L'\0';\r | |
206 | Data = StrHexToUintn (PtrPosition);\r | |
207 | Guid->Data1 = (UINT32)Data;\r | |
208 | \r | |
209 | //\r | |
210 | // Data2\r | |
211 | //\r | |
212 | PtrBuffer++;\r | |
213 | PtrPosition = PtrBuffer;\r | |
214 | while (*PtrBuffer != L'\0') {\r | |
215 | if (*PtrBuffer == L'-') {\r | |
216 | break;\r | |
217 | }\r | |
218 | PtrBuffer++;\r | |
219 | }\r | |
220 | if (*PtrBuffer == L'\0') {\r | |
221 | FreePool (Buffer);\r | |
222 | return EFI_NOT_FOUND;\r | |
223 | }\r | |
224 | *PtrBuffer = L'\0';\r | |
225 | Data = StrHexToUintn (PtrPosition);\r | |
226 | Guid->Data2 = (UINT16)Data;\r | |
227 | \r | |
228 | //\r | |
229 | // Data3\r | |
230 | //\r | |
231 | PtrBuffer++;\r | |
232 | PtrPosition = PtrBuffer;\r | |
233 | while (*PtrBuffer != L'\0') {\r | |
234 | if (*PtrBuffer == L'-') {\r | |
235 | break;\r | |
236 | }\r | |
237 | PtrBuffer++;\r | |
238 | }\r | |
239 | if (*PtrBuffer == L'\0') {\r | |
240 | FreePool (Buffer);\r | |
241 | return EFI_NOT_FOUND;\r | |
242 | }\r | |
243 | *PtrBuffer = L'\0';\r | |
244 | Data = StrHexToUintn (PtrPosition);\r | |
245 | Guid->Data3 = (UINT16)Data;\r | |
246 | \r | |
247 | //\r | |
248 | // Data4[0..1]\r | |
249 | //\r | |
250 | for ( Index = 0 ; Index < 2 ; Index++) {\r | |
251 | PtrBuffer++;\r | |
252 | if ((*PtrBuffer == L'\0') || ( *(PtrBuffer + 1) == L'\0')) {\r | |
253 | FreePool (Buffer);\r | |
254 | return EFI_NOT_FOUND;\r | |
255 | }\r | |
256 | Digits[0] = *PtrBuffer;\r | |
257 | PtrBuffer++;\r | |
258 | Digits[1] = *PtrBuffer;\r | |
259 | Digits[2] = L'\0';\r | |
260 | Data = StrHexToUintn (Digits);\r | |
261 | Guid->Data4[Index] = (UINT8)Data;\r | |
262 | }\r | |
263 | \r | |
264 | //\r | |
265 | // skip the '-'\r | |
266 | //\r | |
267 | PtrBuffer++;\r | |
268 | if ((*PtrBuffer != L'-' ) || ( *PtrBuffer == L'\0')) {\r | |
269 | return EFI_NOT_FOUND;\r | |
270 | }\r | |
271 | \r | |
272 | //\r | |
273 | // Data4[2..7]\r | |
274 | //\r | |
275 | for ( ; Index < 8; Index++) {\r | |
276 | PtrBuffer++;\r | |
277 | if ((*PtrBuffer == L'\0') || ( *(PtrBuffer + 1) == L'\0')) {\r | |
278 | FreePool (Buffer);\r | |
279 | return EFI_NOT_FOUND;\r | |
280 | }\r | |
281 | Digits[0] = *PtrBuffer;\r | |
282 | PtrBuffer++;\r | |
283 | Digits[1] = *PtrBuffer;\r | |
284 | Digits[2] = L'\0';\r | |
285 | Data = StrHexToUintn (Digits);\r | |
286 | Guid->Data4[Index] = (UINT8)Data;\r | |
287 | }\r | |
288 | \r | |
289 | FreePool (Buffer);\r | |
290 | \r | |
291 | return EFI_SUCCESS;\r | |
292 | }\r | |
293 | \r | |
294 | /**\r | |
295 | Worker function that prints an EFI_GUID into specified Buffer.\r | |
296 | \r | |
297 | @param[in] Guid Pointer to GUID to print.\r | |
298 | @param[in] Buffer Buffer to print Guid into.\r | |
299 | @param[in] BufferSize Size of Buffer.\r | |
300 | \r | |
301 | @retval Number of characters printed.\r | |
302 | \r | |
303 | **/\r | |
304 | UINTN\r | |
305 | GuidToString (\r | |
306 | IN EFI_GUID *Guid,\r | |
307 | IN CHAR16 *Buffer,\r | |
308 | IN UINTN BufferSize\r | |
309 | )\r | |
310 | {\r | |
311 | UINTN Size;\r | |
312 | \r | |
313 | Size = UnicodeSPrint (\r | |
314 | Buffer,\r | |
315 | BufferSize, \r | |
316 | L"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",\r | |
317 | (UINTN)Guid->Data1, \r | |
318 | (UINTN)Guid->Data2,\r | |
319 | (UINTN)Guid->Data3,\r | |
320 | (UINTN)Guid->Data4[0],\r | |
321 | (UINTN)Guid->Data4[1],\r | |
322 | (UINTN)Guid->Data4[2],\r | |
323 | (UINTN)Guid->Data4[3],\r | |
324 | (UINTN)Guid->Data4[4],\r | |
325 | (UINTN)Guid->Data4[5],\r | |
326 | (UINTN)Guid->Data4[6],\r | |
327 | (UINTN)Guid->Data4[7]\r | |
328 | );\r | |
329 | \r | |
330 | //\r | |
331 | // SPrint will null terminate the string. The -1 skips the null\r | |
332 | //\r | |
333 | return Size - 1;\r | |
334 | }\r |