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patterns: Added Ubiquiti firmware pattern (#145)
* Ubiquiti firmware pattern * Added padding and crc32 fields * Added unit test file + Renamed fields in partition struct
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| #pragma endian big | ||
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| #include <std/mem.pat> | ||
| #include <std/sys.pat> | ||
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| // Ubiquiti Firmware related structs | ||
| // More information here: https://dl.ubnt.com/firmwares/XN-fw/v5.6.3/GPL.UBNT.v5.6.3.tar.bz2 | ||
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| /* | ||
| * Block types of a default firmware file file: | ||
| * - UBNT := header | ||
| * - PART := partition | ||
| * - EXEC := additional data block | ||
| * - END. := default end block | ||
| * - ENDS := signed end block using RSA 2048 bit | ||
| */ | ||
| #define TYPE_UBNT "UBNT" | ||
| #define TYPE_PART "PART" | ||
| #define TYPE_EXEC "EXEC" | ||
| #define TYPE_END "END." | ||
| #define TYPE_SIGNED_END "ENDS" | ||
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| namespace ubnt { | ||
| struct UBNT { | ||
| char version[256]; | ||
| u32 crc32; | ||
| }; | ||
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| struct PART { | ||
| char name[16]; | ||
| padding[12]; | ||
| u32 memaddr; | ||
| u32 index; | ||
| u32 baseaddr; | ||
| u32 entryaddr; | ||
| u32 data_size; | ||
| u32 part_size; | ||
| u8 data[this.data_size]; | ||
| u32 crc32; | ||
| }; | ||
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| struct EXEC { | ||
| char name[16]; | ||
| u8 reserved[28]; | ||
| u32 size; | ||
| u32 size2; | ||
| u32 crc32; | ||
| u8 data[this.size]; | ||
| }; | ||
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| struct END { | ||
| u32 crc32; | ||
| }; | ||
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| struct ENDS { | ||
| u8 data[256]; | ||
| }; | ||
| } | ||
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| struct Block { | ||
| char type[4]; | ||
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| if (type == TYPE_UBNT) { | ||
| ubnt::UBNT header; | ||
| } | ||
| else if (type == TYPE_PART) { | ||
| ubnt::PART partition; | ||
| } | ||
| else if (type == TYPE_EXEC) { | ||
| ubnt::EXEC data; | ||
| } | ||
| else if (type == TYPE_END) { | ||
| ubnt::END end; | ||
| } | ||
| else if (type == TYPE_SIGNED_END) { | ||
| ubnt::ENDS end; | ||
| } | ||
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| // REVISIT: change the type to u32 | ||
| padding[4]; | ||
| }; | ||
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| // Greedy parsing of Block structs | ||
| Block blocks[while(!std::mem::eof())] @ 0x00; | ||
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| std::assert(blocks[0].type == TYPE_UBNT, | ||
| "File is not a valid Ubiquiti firmare file!"); | ||
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| std::print("Version: {}", blocks[0].header.version); |
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