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Encoder Application

The encoder application allows to encript or decript HEX files for microcontroller. The encription is implemented by using XTEA algorithm. You can also browse the recent source code online at "encoder source code".

The encoder application supports the following commands (Table 8.1, “Encoder commands”):


Table 8.1. Encoder commands

Short Command Full Command Parameter Value Description
-h -help   Displays the supported commands and options description.
-e -encode PASSWORD Encode the input file with PASSWORD and save it to output file. PASSWORD is used as an encryption key. PASSWORD has to be provided as string of two hex digits per byte (like 01202040ac).
-d -decode PASSWORD Decode the input file with PASSWORD and save it to output file. PASSWORD is used as an encryption key. PASSWORD has to be provided as string of two hex digits per byte (like 01202040ac).
-c -convert   Convert the file from one format to another.

 

The encoder application supports the following options(Table 8.2, “Encoder options”):


Table 8.2. Encoder options

Short Option Full Option Parameter Value Description
-ix -input_hex FILENAME Input file in Intel Hex Format.
-ib -input_bin FILENAME Input file in Binary Format.
-id -input_data DATA Immediate mode - actual byte(s) specified in the command line as string of two hex digits per byte (like 01202040ac).
-ox -output_hex FILENAME Output file in Intel Hex Format.
-ob -output_bin FILENAME Output file in Binary Format.


For instance, we need to perform the "example.hex" file encryption using Intel Hex file format and "0102030405060708090a0b0c0d0e0f10" encription key. The command line for this operation is:

encoder -e 0102030405060708090a0b0c0d0e0f10 
-ix example.hex -ox example_encrypted.hex

To decrypt "example_encrypted.hex" use following command line:

encoder -d 0102030405060708090a0b0c0d0e0f10 
-ix example_encrypted.hex -ox example_decrypted.hex