3DSaveTool can be used to find the XOR key used for encryption and use it to encrypt/decrypt EEPROM savefiles of 3DS games.
Usage:
3DSaveTool [-x|-f] in.bin out.bin key.bin
-x: decrypt/encrypt a savefile
-f: find XOR key
Example usage:
3DSaveTool -x savefile.bin [decrypted.bin|encrypted.bin] key.bin3DSaveTool -f savefile.bin key.bin
Usage:
3DSaveTool [-x|-f] in.bin out.bin key.bin
-x: decrypt/encrypt a savefile
-f: find XOR key
Example usage:
3DSaveTool -x savefile.bin [decrypted.bin|encrypted.bin] key.bin3DSaveTool -f savefile.bin key.bin