charles_convert_raw_hexdump_to_bin.sh

#!/usr/bin/env bash

# ex: ./charles_convert_raw_hexdump_to_bin.sh hexdumpraw.txt hexformatted.txt data.bin

# hexdumpraw.txt ex:
## 00000510  0a 6d 6f 64 65 6c 5f 6e 61 6d 65 12 07 4e 65 78    model_name  Nex
## 00000520  75 73 20 35 1a 20 0a 11 61 72 63 68 69 74 65 63   us 5    architec
## 00000530  74 75 72 65 5f 6e 61 6d 65 12 0b 61 72 6d 65 61   ture_name  armea
## 00000540  62 69 2d 76 37 61 1a 19 0a 0b 64 65 76 69 63 65   bi-v7a    device
## 00000550  5f 6e 61 6d 65 12 0a 68 61 6d 6d 65 72 68 65 61   _name  hammerhea
## 00000560  64 1a 1a 0a 0c 70 72 6f 64 75 63 74 5f 6e 61 6d   d    product_nam
## 00000570  65 12 0a 68 61 6d 6d 65 72 68 65 61 64 1a 51 0a   e  hammerhead Q 
## 00000580  0a 62 75 69 6c 64 5f 69 6e 66 6f 12 43 67 6f 6f    build_info Cgoo

# hexformatted.txt outputs to:
## 0a 6d 6f 64 65 6c 5f 6e 61 6d 65 12 07 4e 65 78
## 75 73 20 35 1a 20 0a 11 61 72 63 68 69 74 65 63
## 74 75 72 65 5f 6e 61 6d 65 12 0b 61 72 6d 65 61
## ....

# data.bin represents hex above

if [ "$#" -ne 3 ]; then
    echo "Incorrect inputs"
    echo "./charles_convert_raw_hexdump_to_bin.sh <input hex raw file> <output hex dump formatted> <output binary from formatted hex dump file>"
    echo "ex: ./charles_convert_raw_hexdump_to_bin.sh hexdumpraw.txt hexformatted.txt data.bin"
    exit 1
fi

echo "" > $2
cat $1 | while read line 
do
   # extracts 16 byte hex line from larger string
   newLine="${line:10:47}"
   echo $newLine >> $2
done

# remove blank first line from file
sed -i '1d' $2

# converts text hex values into binary
xxd -r -p $2 $3

echo "COMPLETE!"