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| 1 // Copyright (c) 2010 The Chromium OS 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 |
| 6 #ifndef VBOOT_REFERENCE_GBB_UTILITY_H_ |
| 7 #define VBOOT_REFERENCE_GBB_UTILITY_H_ |
| 8 |
| 9 #include <string> |
| 10 #include "gbb_header.h" |
| 11 |
| 12 namespace vboot_reference { |
| 13 |
| 14 class GoogleBinaryBlockUtil { |
| 15 public: |
| 16 GoogleBinaryBlockUtil(); |
| 17 ~GoogleBinaryBlockUtil(); |
| 18 |
| 19 // load GBB from a BIOS image file. |
| 20 // return true if a valid GBB was retrieved. |
| 21 bool load_from_file(const char *filename); |
| 22 |
| 23 // save loaded (and modified) GBB with BIOS image to new file |
| 24 // return true on success. |
| 25 bool save_to_file(const char *filename); |
| 26 |
| 27 // getters and setters of properties in GBB |
| 28 bool set_hwid(const char *hwid); // hwid is NUL-terminated. |
| 29 bool set_rootkey(const std::string &value); |
| 30 bool set_bmpfv(const std::string &value); |
| 31 std::string get_hwid() const { return get_property(PROP_HWID); } |
| 32 std::string get_rootkey() const { return get_property(PROP_ROOTKEY); } |
| 33 std::string get_bmpfv() const { return get_property(PROP_BMPFV); } |
| 34 |
| 35 private: |
| 36 // enumerate of available data fields |
| 37 enum PROPINDEX { |
| 38 PROP_HWID, // hardware id |
| 39 PROP_ROOTKEY, // root key |
| 40 PROP_BMPFV, // bitmap FV |
| 41 }; |
| 42 |
| 43 // clear all cached data and initialize to original state |
| 44 void initialize(); |
| 45 |
| 46 // search and count for GBB signatures in loaded image. |
| 47 // return the number of signatures found. |
| 48 int search_header_signatures(const std::string &image, long *poffset) const; |
| 49 |
| 50 // load and check header structure from image by given offset. |
| 51 // return true if a valid GBB header is loaded into *phdr. |
| 52 bool load_gbb_header(const std::string &image, long offset, |
| 53 GoogleBinaryBlockHeader *phdr) const; |
| 54 |
| 55 // retrieve a property from GBB data. |
| 56 // return the property value. |
| 57 std::string get_property(PROPINDEX i) const; |
| 58 |
| 59 // overwrite a property in GBB data. |
| 60 // return true on success. |
| 61 bool set_property(PROPINDEX i, const std::string &value); |
| 62 |
| 63 // find the size and offset information for given property |
| 64 // return true if the offset and size are assign to *poffset and *psize. |
| 65 bool find_property(PROPINDEX i, uint32_t *poffset, uint32_t *psize) const; |
| 66 |
| 67 GoogleBinaryBlockHeader header_; // copy of GBB header from image |
| 68 std::string file_content_; // complete image file content |
| 69 long header_offset_; // offset to GBB header in file_content_ |
| 70 bool is_valid_gbb; // if we are holding a valid GBB |
| 71 |
| 72 bool verbose; // provide verbose messages |
| 73 }; |
| 74 |
| 75 } // namespace vboot_reference |
| 76 |
| 77 #endif // VBOOT_REFERENCE_GBB_UTILITY_H_ |
| 78 |
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