- Create cbc.c & cbc.h
 - Create ecb.c & ecb.h

 - Create file des_key_schedule.c
 - Create functions "permute_block" & "des_key_schedule"
 - Create global tab "g_permute_tab" in des file

Next Change: 
 - Continue des try...
 - Continue the read of doc

 - Create printer for the permutation of bits
 - Update & testing the function permute_block (ok)

Next Change:
 - Slip block in 2 blocks of 32 bits
 - Create function for the cycle

 - Change function block-permute in des-permute
 - Slip the block of 64 bits in two block of 32 bits
 - Permute the second part of block 32 bits in 48 bits

Next Change: 
 - Slip the 48 part of block in tiny blocks of 4 bits
 - Permute the key of 64 bits in 56 bits and 48 bits...

 - Re-write the function des_key_schedule
 - Create structure for the des_key
 - Progress in the blocks cycle

[Next Change]:
 - Continue the des_key_schedule
 - Continue the blocks cycle

 - Duplicate the function des_key_schedule:
          - One return struct t_des_keys
          - Other one return pointer of uint32_t
 - Create while i < 16 for the cycle

[Next Change]:
 - Writing the xor of key and blocks
 - Inverse the left block with the right block