diff --git a/Makefile b/Makefile
index 3b059203..d82be069 100644
--- a/Makefile
+++ b/Makefile
@@ -86,8 +86,11 @@ SHA_SRC =						ft_sha256.c 				\
 								ft_sha_print.c 				\
 								ft_sha_usage.c
 
-BASE64_SRC =					ft_base64_init.c 			\
+BASE64_SRC =					ft_base64.c 				\
+								ft_base64_init.c 			\
 								ft_base64_fill_buffer.c 	\
+								ft_base64_transform.c 		\
+								ft_base64_decode.c 			\
 								ft_base64_encode.c
 
 SRC =							main.c						\
@@ -163,10 +166,10 @@ CC :=							clang
 
 # rules
 
-$(NAME): $(LIBFT) $(OBJ)
+$(NAME): $(LIBFT) $(OBJ) $(HEADERS)
 	$(CC) $(OBJ) $(LINK_FLAGS) -o $(NAME)
 
-$(TEST_BIN): $(LIBFT) $(TEST_OBJ)
+$(TEST_BIN): $(LIBFT) $(TEST_OBJ) $(HEADERS)
 	$(CC) $(TEST_OBJ) $(LINK_FLAGS) -o $(TEST_BIN)
 
 $(TEST_OBJ) $(OBJ): | $(OBJ_DIR)
@@ -174,7 +177,7 @@ $(TEST_OBJ) $(OBJ): | $(OBJ_DIR)
 $(OBJ_DIR):
 	mkdir $(OBJ_DIR)
 
-$(OBJ_DIR)%.o: %.c $(HEADERS)
+$(OBJ_DIR)%.o: %.c
 	$(CC) -c $< -o $@ $(CC_FLAGS) $(HEADER_FLAGS)
 
 $(LIBFT):
diff --git a/inc/ft_base64.h b/inc/ft_base64.h
index 975d75d9..46f14f4d 100644
--- a/inc/ft_base64.h
+++ b/inc/ft_base64.h
@@ -24,15 +24,51 @@ typedef unsigned char	t_byte1;
 
 typedef struct			s_base64_ctx
 {
+	int					input_fd;
+	int					output_fd;
 	t_byte8				glue_block_bytes_count;
 	t_byte1				glue_block[FT_BASE64_GLUE_BLOCK_SIZE];
 	t_byte1				alphabet[FT_BASE64_ALPHABET_LENGTH];
 	t_byte1				chars[FT_BASE64_CHARS_SIZE];
 }						t_base64_ctx;
 
-void					ft_base64_init(t_base64_ctx *ctx);
-void					ft_base64_fill_buffer(
-							t_base64_ctx *ctx, t_byte1 *data, t_byte8 size);
-void					ft_base64_encode(t_base64_ctx *ctx, t_byte1 *data);
+typedef struct 			s_base64_flags
+{
+	int					decode;
+}						t_base64_flags;
+
+void					ft_base64
+(
+	int argc,
+	char **argv
+);
+
+void					ft_base64_init
+(
+	t_base64_ctx *ctx
+);
+
+void					ft_base64_decode
+(
+	t_base64_ctx *ctx
+);
+
+void					ft_base64_encode
+(
+	t_base64_ctx *ctx
+);
+
+void					ft_base64_fill_buffer
+(
+	t_base64_ctx *ctx,
+	t_byte1 *data,
+	t_byte8 size
+);
+
+void					ft_base64_transform
+(
+	t_base64_ctx *ctx,
+	t_byte1 *data
+);
 
 #endif
diff --git a/inc/tests.h b/inc/tests.h
index 1323f668..f8da8294 100644
--- a/inc/tests.h
+++ b/inc/tests.h
@@ -75,6 +75,6 @@ MunitResult	should_init_base64_ctx(const MunitParameter test_params[],
 MunitResult	should_fill_base64_buffer(const MunitParameter test_params[],
 			void *test_data);
 
-MunitResult should_encode_base64_data(const MunitParameter test_params[],
+MunitResult should_transform_base64_block(const MunitParameter test_params[],
 			void *test_data);
 #endif
diff --git a/src/base64/ft_base64.c b/src/base64/ft_base64.c
new file mode 100644
index 00000000..19f7b98f
--- /dev/null
+++ b/src/base64/ft_base64.c
@@ -0,0 +1,64 @@
+#include "libft.h"
+#include "ft_base64.h"
+
+static void	open_input_stream(t_base64_ctx *ctx, char *filename)
+{
+	(void)ctx;
+	(void)filename;
+}
+
+static void	open_output_stream(t_base64_ctx *ctx, char *filename)
+{
+	(void)ctx;
+	(void)filename;
+}
+
+static void	init_flags(t_base64_flags *flags)
+{
+	flags->decode = 0;
+}
+
+static void read_args
+(
+	int argc,
+	char **argv,
+	t_base64_flags *flags,
+	t_base64_ctx *ctx
+)
+{
+	int i;
+	char *current_arg;
+	char *next_arg;
+
+	i = 0;
+	while(i < argc)
+	{
+		current_arg = argv[i];
+		next_arg = i + 1 < argc ? argv[i + 1] : NULL;
+		if (ft_strcmp(current_arg, "-d") == 0)
+			flags->decode = 1;
+		else if (ft_strcmp(current_arg, "-e") == 0 && i++)
+			continue;
+		else if (ft_strcmp(current_arg, "-i") == 0)
+			open_input_stream(ctx, next_arg);
+		else if (ft_strcmp(current_arg, "-o") == 0)
+			open_output_stream(ctx, next_arg);
+		else if (i++)
+			continue;
+		i++;
+	}
+}
+
+void		ft_base64(int argc, char **argv)
+{
+	t_base64_flags	flags;
+	t_base64_ctx	ctx;
+
+	init_flags(&flags);
+	read_args(argc, argv, &flags, &ctx);
+	if (flags.decode)
+		ft_base64_decode(&ctx);
+	else
+		ft_base64_encode(&ctx);
+	exit(0);
+}
\ No newline at end of file
diff --git a/src/base64/ft_base64_decode.c b/src/base64/ft_base64_decode.c
new file mode 100644
index 00000000..aed29d83
--- /dev/null
+++ b/src/base64/ft_base64_decode.c
@@ -0,0 +1,6 @@
+#include "ft_base64.h"
+
+void	ft_base64_decode(t_base64_ctx *ctx)
+{
+	(void)ctx;
+}
\ No newline at end of file
diff --git a/src/base64/ft_base64_encode.c b/src/base64/ft_base64_encode.c
index 8b7736e1..f0efb1aa 100644
--- a/src/base64/ft_base64_encode.c
+++ b/src/base64/ft_base64_encode.c
@@ -1,31 +1,6 @@
-/* ************************************************************************** */
-/*                                                                            */
-/*                                                        :::      ::::::::   */
-/*   ft_base64_encode.c                                 :+:      :+:    :+:   */
-/*                                                    +:+ +:+         +:+     */
-/*   By: gtertysh <marvin@42.fr>                    +#+  +:+       +#+        */
-/*                                                +#+#+#+#+#+   +#+           */
-/*   Created: 2019/02/02 18:26:32 by gtertysh          #+#    #+#             */
-/*   Updated: 2019/02/02 18:26:51 by gtertysh         ###   ########.fr       */
-/*                                                                            */
-/* ************************************************************************** */
-
-#include "libft.h"
 #include "ft_base64.h"
 
-void	ft_base64_encode(t_base64_ctx *ctx, t_byte1 *data)
+void	ft_base64_encode(t_base64_ctx *ctx)
 {
-	t_byte1		first_char;
-	t_byte1		second_char;
-	t_byte1		third_char;
-	t_byte1		fourth_char;
-
-	first_char = (data[0] >> 2) & 0x3f;
-	second_char = ((data[0] << 4) & 0x30) | ((data[1] >> 4) & 0xf);
-	third_char = ((data[1] << 2) & 0x3c) | ((data[2] >> 6) & 0x3);
-	fourth_char = data[2] & 0x3F;
-	ctx->chars[0] = ctx->alphabet[first_char];
-	ctx->chars[1] = ctx->alphabet[second_char];
-	ctx->chars[2] = ctx->alphabet[third_char];
-	ctx->chars[3] = ctx->alphabet[fourth_char];
-}
+	(void)ctx;
+}
\ No newline at end of file
diff --git a/src/base64/ft_base64_init.c b/src/base64/ft_base64_init.c
index 675055b3..f47cc6e3 100644
--- a/src/base64/ft_base64_init.c
+++ b/src/base64/ft_base64_init.c
@@ -12,10 +12,13 @@
 
 #include "ft_base64.h"
 #include "libft.h"
+#include <unistd.h>
 
 void	ft_base64_init(t_base64_ctx *ctx)
 {
 	ctx->glue_block_bytes_count = 0;
+	ctx->input_fd = STDIN_FILENO;
+	ctx->output_fd = STDOUT_FILENO;
 	ft_bzero(ctx->glue_block, FT_BASE64_GLUE_BLOCK_SIZE);
 	ft_bzero(ctx->chars, FT_BASE64_CHARS_SIZE);
 	ft_memcpy(ctx->alphabet, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", 26);
diff --git a/src/base64/ft_base64_transform.c b/src/base64/ft_base64_transform.c
new file mode 100644
index 00000000..05fa48be
--- /dev/null
+++ b/src/base64/ft_base64_transform.c
@@ -0,0 +1,31 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_base64_transform.c                              :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: gtertysh <marvin@42.fr>                    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2019/02/02 18:26:32 by gtertysh          #+#    #+#             */
+/*   Updated: 2019/02/02 18:26:51 by gtertysh         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+#include "ft_base64.h"
+
+void	ft_base64_transform(t_base64_ctx *ctx, t_byte1 *data)
+{
+	t_byte1		first_char;
+	t_byte1		second_char;
+	t_byte1		third_char;
+	t_byte1		fourth_char;
+
+	first_char = (data[0] >> 2) & 0x3f;
+	second_char = ((data[0] << 4) & 0x30) | ((data[1] >> 4) & 0xf);
+	third_char = ((data[1] << 2) & 0x3c) | ((data[2] >> 6) & 0x3);
+	fourth_char = data[2] & 0x3F;
+	ctx->chars[0] = ctx->alphabet[first_char];
+	ctx->chars[1] = ctx->alphabet[second_char];
+	ctx->chars[2] = ctx->alphabet[third_char];
+	ctx->chars[3] = ctx->alphabet[fourth_char];
+}
diff --git a/src/main.c b/src/main.c
index 887aff4c..7a7ebf17 100644
--- a/src/main.c
+++ b/src/main.c
@@ -13,6 +13,7 @@
 #include "ft_ssl.h"
 #include "ft_md5.h"
 #include "ft_sha.h"
+#include "ft_base64.h"
 #include "libft.h"
 
 t_algorithm g_algorithms[] = {
@@ -28,6 +29,10 @@ t_algorithm g_algorithms[] = {
 		"sha224",
 		ft_sha224,
 	},
+	{
+		"base64",
+		ft_base64,
+	},
 	{NULL, NULL}
 };
 
diff --git a/t/base64_tests.c b/t/base64_tests.c
index 59f1828f..ca1513aa 100644
--- a/t/base64_tests.c
+++ b/t/base64_tests.c
@@ -1,3 +1,4 @@
+#include <unistd.h>
 #include "tests.h"
 #include "tests_macros.h"
 #include "ft_base64.h"
@@ -12,6 +13,9 @@ abcdefghijklmnopqrstuvwxyz0123456789+/";
 
 	ft_base64_init(&ctx);
 
+	munit_assert_true(ctx.input_fd == STDIN_FILENO);
+	munit_assert_true(ctx.output_fd == STDOUT_FILENO);
+
 	for (int i = 0; i < FT_BASE64_GLUE_BLOCK_SIZE; i++)
 		munit_assert_uchar(ctx.glue_block[i], ==, 0);
 
@@ -43,7 +47,7 @@ TEST_RESULT should_fill_base64_buffer(TEST_PARAMS, TEST_DATA)
 	return MUNIT_OK;
 }
 
-TEST_RESULT should_encode_base64_data(TEST_PARAMS, TEST_DATA)
+TEST_RESULT should_transform_base64_block(TEST_PARAMS, TEST_DATA)
 {
 	UNUSED(test_params);
 	UNUSED(test_data);
@@ -52,10 +56,10 @@ TEST_RESULT should_encode_base64_data(TEST_PARAMS, TEST_DATA)
 
 	ft_base64_init(&ctx);
 
-	ft_base64_encode(&ctx, (t_byte1 *)"Man");
+	ft_base64_transform(&ctx, (t_byte1 *)"Man");
 	munit_assert_string_equal((char *)ctx.chars, "TWFu");
 
-	ft_base64_encode(&ctx, (t_byte1 *)"LOL");
+	ft_base64_transform(&ctx, (t_byte1 *)"LOL");
 	munit_assert_string_equal((char *)ctx.chars, "TE9M");
 	return MUNIT_OK;
 }
\ No newline at end of file
diff --git a/t/tests.c b/t/tests.c
index 9999ab95..3a691cdd 100644
--- a/t/tests.c
+++ b/t/tests.c
@@ -43,7 +43,7 @@ MunitTest g_sha_tests[] = {
 MunitTest g_base64_tests[] = {
 	IT("/init_ctx", should_init_base64_ctx, NULL, NULL, 0, NULL),
 	IT("/fills_buffer", should_fill_base64_buffer, NULL, NULL, 0, NULL),
-	IT("/encodes_data", should_encode_base64_data, NULL, NULL, 0, NULL),
+	IT("/transform_block", should_transform_base64_block, NULL, NULL, 0, NULL),
 	END_IT
 };