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Ian Skinner 2023-08-20 20:55:48 -04:00 committed by GitHub
parent 83aadd766a
commit ef37aa6d64
1 changed files with 28 additions and 25 deletions
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extract-updater-rofs.sh
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@ -1,6 +1,6 @@
# extract-updater-rofs # extract-updater-rofs
# Extracts firmware CIAs from ROFS containers for some gigaleak SystemUpdaters. # Extracts firmware CIAs from ROFS containers for some gigaleak SystemUpdaters.
# Place in same directory as ROFS named "romfs.bin" # Place in same directory as an extracted "romfs.bin" OR "Contents.cnt"
echo "Finding CIA headers in file..." echo "Finding CIA headers in file..."
od -t x -A d romfs.bin | grep "00002020 00000000 00000a00 00000350" | sed 's/ .*//' | sed 's/^0*//' > romfs-dir.txt od -t x -A d romfs.bin | grep "00002020 00000000 00000a00 00000350" | sed 's/ .*//' | sed 's/^0*//' > romfs-dir.txt
@ -76,6 +76,7 @@ START_HEADER=$( tail -n 1 romfs-dir.txt )
NEXT_HEADER=$((16#$(xxd romfs.bin | grep "226e 6f6e 6522" | sed 's/: .*//' | sed 's/^0*//'))); NEXT_HEADER=$((16#$(xxd romfs.bin | grep "226e 6f6e 6522" | sed 's/: .*//' | sed 's/^0*//')));
# Find "226e 6f6e 6522" as it is the last predictable data to mark the end of Contents.cnt and the last CIA. # Find "226e 6f6e 6522" as it is the last predictable data to mark the end of Contents.cnt and the last CIA.
# Upsettingly I have to use xxd because od wouldn't turn up any results for this... I liked od's formatting more :despair: # Upsettingly I have to use xxd because od wouldn't turn up any results for this... I liked od's formatting more :despair:
if [ $NEXT_HEADER != "" ]; then
echo " Check CIA length" echo " Check CIA length"
echo "Final CIA header at ${START_HEADER}" echo "Final CIA header at ${START_HEADER}"
echo "Contents.cnt end at ${NEXT_HEADER}" echo "Contents.cnt end at ${NEXT_HEADER}"
@ -100,3 +101,5 @@ dd skip=${START_HEADER} count=${CIA_LENGTH} if=romfs.bin of="0.cia" bs=1
echo "Final CIA output as '0.cia', ${CIA_LENGTH} bytes." echo "Final CIA output as '0.cia', ${CIA_LENGTH} bytes."
echo "=================================================" echo "================================================="
echo "All CIAs extracted from RomFS!" echo "All CIAs extracted from RomFS!"
else
echo "Could not find end of last CIA! For extracting manually, start address is ${START_HEADER} (decimal)"