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17 lines
512 B
Bash
Executable File
17 lines
512 B
Bash
Executable File
#!/usr/bin/env bash
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read_u8() {
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dd if=$1 bs=1 skip=$(($2)) count=1 2>/dev/null | od -An -tu1 | grep -Eo '[0-9]+'
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}
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read_u32() {
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dd if=$1 bs=1 skip=$(($2)) count=4 2>/dev/null | od -An -tu4 | grep -Eo '[0-9]+'
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}
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set -x
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setup_size=$(read_u8 $1 0x1f1)
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payload_offset=$(read_u32 $1 0x248)
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payload_length=$(read_u32 $1 0x24c)
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inner_pos=$((($setup_size + 1) * 512))
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tail -c+$(($inner_pos + 1)) $1 | tail -c+$(($payload_offset + 1)) | head -c $(($payload_length)) | head -c $(($payload_length - 4)) | unlzma >$2
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