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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| :: | ||
| :: Patch build files to remove non-deterministic properties for reproducible builds | ||
| :: This batch file complements ducible which does not fix .rscr section timestamps of sub tables | ||
| :: and the import table ordinals and DLL name capitalization that differ between machine versions | ||
| :: | ||
| :: Arguments: DLLFILE | ||
| :: | ||
| @ECHO OFF | ||
| SETLOCAL ENABLEDELAYEDEXPANSION | ||
| SET LC_ALL=en_US.utf8 | ||
|
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||
| :: Sanity check | ||
| IF [%1] == [] GOTO usage | ||
| SET "file=%~1" | ||
| SET filebase=%~n1 | ||
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| :: Use objdump to get a summary of the file to later compare patched bytes | ||
| objdump -x %file% > %file%.txt | ||
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| :: First: Zero out the hints and ordinal values in the import table | ||
|
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| :: Find image base | ||
| TYPE %file%.txt ^ | ||
| | grep -oiP "^ImageBase[[:blank:]]+[[:xdigit:]]+[[:space:]]?$" ^ | ||
| > base.txt | ||
| FOR /F "tokens=2" %%a IN (base.txt) DO ( | ||
| SET /A "image_base=0x%%a" | ||
| ) | ||
| DEL /Q base.txt | ||
|
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| ECHO ImageBase: %image_base% | ||
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| :: Find VMA and file offset of .idata section | ||
| objdump -h -j .idata %file% | findstr "\.idata" > header.txt 2>nul | ||
| FOR /F "tokens=3,4,6" %%a IN (header.txt) DO ( | ||
| SET /A "idata_size=0x%%a" | ||
| SET /A "idata_vma=0x%%b" | ||
| SET /A "idata_offset=0x%%c" | ||
| ) | ||
| DEL /Q header.txt | ||
|
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||
| :: Subtract image base from VMA for relative addresses | ||
| SET /A "idata_vma=idata_vma-image_base" | ||
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| ECHO Import table: %idata_vma% at offset %idata_offset% | ||
|
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| :: Find the addresses of IAT entries | ||
| TYPE %file%.txt ^ | ||
| | grep -zoiP "(?<=The Import Tables)(.|\r|\n)*(?=(?:0{8}\s){5})" ^ | ||
| | grep -aoiP "^[[:blank:]]+[[:xdigit:]]+[[:blank:]]+\d+[[:blank:]]+[\w\d@_]+[[:space:]]?$" ^ | ||
| > iat.txt | ||
| FOR /F "tokens=1" %%A IN (iat.txt) DO ( | ||
| :: Calculate the file offset from VMA | ||
| SET "hex=%%A" | ||
| SET /A "hex_dec=0x!hex!" | ||
| SET /A "addr=!hex_dec!-!idata_vma!+!idata_offset!" | ||
| :: Zero out ordinal number at address (WORD) | ||
| ECHO -n 0000 | xxd -r -p | dd of=%file% bs=1 seek=!addr! count=2 conv=notrunc > nul 2>&1 | ||
| ) | ||
| DEL /Q iat.txt | ||
|
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||
| :: Next: Change DLL names upper case for consistency | ||
|
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||
| :: First extract the list of DLL names | ||
| TYPE %file%.txt ^ | ||
| | grep -zoiP "(?<=The Import Tables)(.|\r|\n)*(?=(?:0{8}\s){5})" ^ | ||
| | grep -aoiP "^[[:blank:]]+Dll Name:[[:blank:]]\K.*[[:space:]]?$" ^ | ||
| > dllnames.txt | ||
| SET "dllnames=" | ||
| FOR /F "delims=" %%A IN (dllnames.txt) DO SET "dllnames=!dllnames! %%A" | ||
| DEL /Q dllnames.txt | ||
|
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||
| :: Then extract the import tables | ||
| TYPE %file%.txt ^ | ||
| | grep -zoiP "(?<=The Import Tables)(.|\r|\n)*(?=(?:0{8}\s){5})" ^ | ||
| | grep -aoiP "^[[:blank:]]+([[:xdigit:]]{8}[[:blank:]]+){5}[[:xdigit:]]{8}[[:space:]]?$" ^ | ||
| > dlltables.txt | ||
|
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||
| SET /A dll_count=0 | ||
| FOR /F "tokens=5" %%A IN (dlltables.txt) DO ( | ||
| SET /A dll_count=dll_count+1 | ||
| :: Calculate the file offset from VMA | ||
| SET "hex=%%A" | ||
| SET /A "hex_dec=0x!hex!" | ||
| SET /A "addr=!hex_dec!-!idata_vma!+!idata_offset!" | ||
| :: Find the length of the DLL name | ||
| SET /A name_idx=0 | ||
| FOR %%N IN (%dllnames%) DO ( | ||
| SET /A name_idx=name_idx+1 | ||
| IF !name_idx! EQU !dll_count! SET "name=%%N" | ||
| ) | ||
| CALL :strlen name len | ||
| :: Convert name to uppercase | ||
| dd if=%file% of=%file% bs=1 seek=!addr! skip=!addr! count=!len! conv=ucase,notrunc > nul 2>&1 | ||
| ) | ||
| DEL /Q dlltables.txt | ||
|
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| :: Next: Remove time stamps from resource table | ||
|
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| :: Find size and offset of .rsrc section | ||
| objdump -h -j .rsrc %file% | findstr "\.rsrc" > header.txt | ||
| FOR /F "tokens=3,6" %%a IN (header.txt) DO ( | ||
| SET /A "rsrc_size=0x%%a" | ||
| SET /A "rsrc_offset=0x%%b" | ||
| ) | ||
| DEL /Q header.txt | ||
|
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||
| :: Better safe than sorry: Assert the section size | ||
| IF "%rsrc_size%" == "" GOTO :CLEANUP | ||
| IF "%rsrc_size%" NEQ "768" ECHO Warning: Resource directory sections is of unexpected size: %rsrc_size%. Cannot make build reproducible.&& GOTO :CLEANUP | ||
|
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||
| :: CAUTION the following is hard-coded to match the offsets of the resource (see Makefile) | ||
|
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| :: Type Table Time | ||
| SET /A "timestamp_offset=rsrc_offset + 4" | ||
| ECHO -n 003b3d4b | xxd -r -p | dd of=%file% bs=1 seek=%timestamp_offset% count=4 conv=notrunc > nul 2>&1 | ||
|
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| :: Name Table Time | ||
| SET /A "timestamp_offset=rsrc_offset + 28" | ||
| ECHO -n 003b3d4b | xxd -r -p | dd of=%file% bs=1 seek=%timestamp_offset% count=4 conv=notrunc > nul 2>&1 | ||
|
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| :: Language Table Time | ||
| SET /A "timestamp_offset=rsrc_offset + 52" | ||
| ECHO -n 003b3d4b | xxd -r -p | dd of=%file% bs=1 seek=%timestamp_offset% count=4 conv=notrunc > nul 2>&1 | ||
|
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| :CLEANUP | ||
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| :: Show the differences | ||
| objdump -x %file% > %file%_patched.txt | ||
| FC %file%.txt %file%_patched.txt | ||
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| :: Cleanup | ||
| DEL /Q %file%.txt | ||
| DEL /Q %file%_patched.txt | ||
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| EXIT /B 0 | ||
|
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| :usage | ||
| ECHO Usage: %~nx0 DLLFILE | ||
| EXIT /B 0 | ||
|
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||
| :: Source: https://ss64.com/nt/syntax-strlen.html | ||
| :strlen StrVar [RtnVar] | ||
| SETLOCAL ENABLEDELAYEDEXPANSION | ||
| SET "s=#!%~1!" | ||
| SET "len=0" | ||
| FOR %%N IN (4096 2048 1024 512 256 128 64 32 16 8 4 2 1) DO ( | ||
| IF "!s:~%%N,1!" NEQ "" ( | ||
| SET /A "len+=%%N" | ||
| SET "s=!s:~%%N!" | ||
| ) | ||
| ) | ||
| ENDLOCAL&if "%~2" NEQ "" (SET %~2=%len%) ELSE ECHO %len% | ||
| EXIT /B |
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