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17 lines
517 B
Bash
Executable File
17 lines
517 B
Bash
Executable File
#!/bin/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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