decrypt_kernel

#!/bin/bash

source common

kernelcache_decrypted="$out_dir"/kernelcache.decrypted
if test -f "$kernelcache_decrypted"; then
    if_no_exit "Decrypted kernelcache file $kernelcache_decrypted already exists, a previous decryption may have already taken place."
fi

kernelcache_files=("$out_dir"/kernelcache.release*)
num=${#kernelcache_files[@]}
if test "$num" -eq 0; then
    error "No kernelcache.release files in $out_dir"
    exit 1
elif test ${#kernelcache_files[@]} -eq 1; then
    kernelcache_crypted=${kernelcache_files[0]}
else
    info "More than one kernelcache files in $out_dir. Using the last one."
    num=$((${#kernelcache_files[@]}-1))
    kernelcache_crypted=${kernelcache_files[$num]}
fi

iv=$(cat "$metadata" | grep '^kernelcache_iv:' | sed 's/^[^:]*://' | tr -d ' ')
key=$(cat "$metadata" | grep '^kernelcache_key:' | sed 's/^[^:]*://' | tr -d ' ')

debug "Change working directory to bin/"
cd ../bin
debug "./decrypt_kernel $kernelcache_crypted $iv $key"
./decrypt_kernel "$kernelcache_crypted" "$iv" "$key"