mirror of
https://github.com/WasserEsser/mattermost-patched-enterprise.git
synced 2026-03-06 21:00:28 +00:00
39 lines
1.0 KiB
Bash
39 lines
1.0 KiB
Bash
#!/bin/bash
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BINARY_FILE=$1
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PATTERN="48 89 C1 48 8B 84 24 ?? ?? ?? ?? E8 ?? ?? ?? ?? 48 85 C0 74 53"
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REPLACEMENT="75"
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OFFSET=19
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SEARCH_PATTERN=$(echo "$PATTERN" | tr -d ' ' | tr '?' '.' | tr 'A-Z' 'a-z')
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echo "Dumping hexcode of original binary"
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hexdump -ve '1/1 "%.2x"' "$BINARY_FILE" > temp_hex_dump
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echo "Searching for rsa.VerifyPKCS1v15 call inside LicenseValidatorImpl.ValidateLicense()"
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FOUND_OFFSET=$(grep -Eo -b "$SEARCH_PATTERN" temp_hex_dump | awk -F: '{print $1}' | head -n 1)
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if [ -z "$FOUND_OFFSET" ]; then
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echo "Call not found!"
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rm temp_hex_dump
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exit 1
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fi
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BYTE_OFFSET=$((FOUND_OFFSET / 2 + OFFSET))
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BYTE_OFFSET_HEX=$(printf "%x" "$BYTE_OFFSET")
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if [ "$BYTE_OFFSET" -lt 0 ]; then
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echo "Error: Calculated offset is before the start of the file!"
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rm temp_hex_dump
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exit 1
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fi
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echo "Call found, patching jz at offset 0x$BYTE_OFFSET_HEX with jnz"
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printf "$REPLACEMENT" | xxd -r -p | dd of="$BINARY_FILE" bs=1 seek="$BYTE_OFFSET" conv=notrunc > /dev/null 2>&1
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rm temp_hex_dump
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echo "Licensing code patched!" |