diff --git a/Makefile b/Makefile
index 1eb29e6a..65bc9e03 100644
--- a/Makefile
+++ b/Makefile
@@ -130,7 +130,8 @@ DES_SRC =						ft_des_initial_permutation.c 				\
 								ft_des_init_ctx.c 							\
 								ft_des_print_error.c 						\
 								ft_des_arg_parsers.c 						\
-								ft_des_ecb_process.c
+								ft_des_ecb_process.c 						\
+								ft_des_ecb_process_chunk.c
 
 SRC =							main.c										\
 								ft_ssl_usage.c
diff --git a/src/des/ft_des_arg_parsers.c b/src/des/ft_des_arg_parsers.c
index aee1afb4..3d42f628 100644
--- a/src/des/ft_des_arg_parsers.c
+++ b/src/des/ft_des_arg_parsers.c
@@ -8,9 +8,26 @@ int	ft_des_key_arg_parser
 	t_des_ctx *ctx
 )
 {
-	(void)ctx;
+	t_byte1 key[FT_DES_INITIAL_KEY_SIZE] = {
+		0, 1, 1, 0, 0, 0, 0, 1,
+		0, 1, 1, 0, 0, 0, 1, 0,
+		0, 1, 1, 0, 0, 0, 1, 1,
+		0, 1, 1, 0, 0, 1, 0, 0,
+		0, 1, 1, 0, 0, 0, 0, 1,
+		0, 1, 1, 0, 0, 0, 1, 0,
+		0, 1, 1, 0, 0, 0, 1, 1,
+		0, 1, 1, 0, 0, 1, 0, 0,
+	};
+	int i;
 	(void)argv;
 	if (position + 1 >= argc)
 		ft_des_print_error("there is no key after -k flag. type -h for help.");
+
+	i = 0;
+	while (i < FT_DES_INITIAL_KEY_SIZE)
+	{
+		ctx->key[i] = key[i];
+		i++;
+	}
 	return (position + 2);
 }
\ No newline at end of file
diff --git a/src/des/ft_des_ecb.c b/src/des/ft_des_ecb.c
index 36ef0648..88a37262 100644
--- a/src/des/ft_des_ecb.c
+++ b/src/des/ft_des_ecb.c
@@ -49,6 +49,6 @@ void		ft_des_ecb
 
 	ft_des_init_ctx(&ctx);
 	parse_args(argc, argv, &ctx);
-	// ft_des_ecb_process(&ctx);
+	ft_des_ecb_process(&ctx);
 	exit(0);
 }
\ No newline at end of file
diff --git a/src/des/ft_des_ecb_process.c b/src/des/ft_des_ecb_process.c
index afc4e8fa..325dc81c 100644
--- a/src/des/ft_des_ecb_process.c
+++ b/src/des/ft_des_ecb_process.c
@@ -6,11 +6,11 @@ void	ft_des_ecb_process
 	t_des_ctx *ctx
 )
 {
-	// t_byte1	buffer[FT_DES_READ_SIZE];
-	// t_byte8	readed;
+	t_byte1	buffer[FT_DES_READ_SIZE];
+	t_byte8	readed;
 
 	ft_des_generate_encryption_round_keys(ctx->key, ctx->round_keys);
-	// while((readed = read(ctx->input_fd, buffer, FT_DES_READ_SIZE)) > 0)
-	// 	ft_des_ecb_process_chunk(ctx, readed, buffer);
+	while((readed = read(ctx->input_fd, buffer, FT_DES_READ_SIZE)) > 0)
+		ft_des_ecb_process_chunk(ctx, readed, buffer);
 	// ft_des_ecb_finish_process(ctx);
 }
\ No newline at end of file
diff --git a/src/des/ft_des_ecb_process_chunk.c b/src/des/ft_des_ecb_process_chunk.c
index 9b470f34..c87eac93 100644
--- a/src/des/ft_des_ecb_process_chunk.c
+++ b/src/des/ft_des_ecb_process_chunk.c
@@ -1,10 +1,22 @@
+#include <unistd.h>
 #include "ft_des.h"
+#include "libft.h"
+
+static void	ft_des_ecb_write
+(
+	t_des_ctx *ctx
+)
+{
+	t_byte1 cyphertext[FT_DES_BYTE_BLOCK_SIZE];
+	ft_des_process_block(ctx->buffer, ctx->round_keys, cyphertext);
+	write(ctx->output_fd, cyphertext, FT_DES_BYTE_BLOCK_SIZE);
+}
 
 void	ft_des_ecb_process_chunk
 (
 	t_des_ctx *ctx,
 	t_byte8 readed,
-	t_byte8 buffer[FT_DES_READ_SIZE]
+	t_byte1 buffer[FT_DES_READ_SIZE]
 )
 {
 	t_byte8		free_space_in_buffer;
@@ -17,11 +29,11 @@ void	ft_des_ecb_process_chunk
 	if (readed >= free_space_in_buffer)
 	{
 		ft_memcpy(&ctx->buffer[buffer_index], buffer, free_space_in_buffer);
-		ft_base64_encode_write(ctx, ctx->buffer);
+		ft_des_ecb_write(ctx);
 		idx = free_space_in_buffer;
 		while(idx + FT_DES_BYTE_BLOCK_SIZE <= readed)
 		{
-			ft_base64_encode_write(ctx, &buffer[idx]);
+			ft_des_ecb_write(ctx);
 			idx += FT_DES_BYTE_BLOCK_SIZE;
 		}
 		buffer_index = 0;
diff --git a/t/cases/des_ecb_8_byte_text.txt b/t/cases/des_ecb_8_byte_text.txt
new file mode 100644
index 00000000..d675fa44
--- /dev/null
+++ b/t/cases/des_ecb_8_byte_text.txt
@@ -0,0 +1 @@
+foo bar