diff --git a/Makefile b/Makefile
index f6656a2a..67302c1c 100644
--- a/Makefile
+++ b/Makefile
@@ -36,8 +36,10 @@ MUINUT_INC :=					-I $(MUINUT_DIR)
 
 # project source files
 
-SRC =							main.c
+MD5_SRC =						ft_md5_init.c
 
+SRC =							main.c
+SRC +=							$(MD5_SRC)
 # project object files
 
 OBJ =							$(addprefix $(OBJ_DIR), $(SRC:.c=.o))
@@ -47,10 +49,12 @@ OBJ =							$(addprefix $(OBJ_DIR), $(SRC:.c=.o))
 
 TEST_BIN =						ft_ssl_test
 
-TEST_SRC =						main_test.c		\
-								test_tests.c
+MD5_TESTS =						md5_tests.c
+MD5_TESTS +=					$(MD5_SRC)
 
-TEST_SRC +=						munit.c
+TEST_SRC =						tests.c		\
+								munit.c
+TEST_SRC +=						$(MD5_TESTS)
 
 TEST_OBJ =						$(addprefix $(OBJ_DIR), $(TEST_SRC:.c=.o))
 
@@ -80,12 +84,13 @@ endif
 
 # linking flags
 
-LINK_FLAGS = ""
+LINK_FLAGS =					$(LIBFT_LIB)
 
 # header flags
 
 HEADER_FLAGS =					-I $(INC_DIR)		\
-								$(MUINUT_INC)
+								$(MUINUT_INC)		\
+								$(LIBFT_INC)
 
 # compiler
 
diff --git a/inc/ft_md5.h b/inc/ft_md5.h
new file mode 100644
index 00000000..459c76a8
--- /dev/null
+++ b/inc/ft_md5.h
@@ -0,0 +1,26 @@
+#ifndef FT_MD5_H
+# define FT_MD5_H
+
+# include <stdint.h>
+
+# define FT_MD5_BUFFER_SIZE 64 
+
+typedef unsigned int BYTE4;
+typedef unsigned char BYTE1;
+
+typedef struct  s_md5_ctx
+{
+    BYTE4       a;
+    BYTE4       b;
+    BYTE4       c;
+    BYTE4       d;
+    BYTE1       buffer[FT_MD5_BUFFER_SIZE];
+    uint64_t    message_len;
+}               t_md5_ctx;
+
+void            ft_md5_init(t_md5_ctx *ctx);
+void            ft_md5_update(t_md5_ctx *ctx, BYTE1 *chunk, BYTE4 len);
+void            ft_md5_transform(t_md5_ctx *ctx, BYTE1 buffer[64]);
+void            ft_md5_final(t_md5_ctx *ctx, BYTE1 *chunk, BYTE4 len);
+
+#endif
diff --git a/inc/tests.h b/inc/tests.h
index 8eb40f1a..1a14465f 100644
--- a/inc/tests.h
+++ b/inc/tests.h
@@ -6,8 +6,6 @@
 #include "tests_macros.h"
 
 // test tests
-CASE(should_pass);
-CASE(should_skip);
-CASE(should_fail);
+CASE(should_init_ctx);
 
 #endif
\ No newline at end of file
diff --git a/src/ft_md5_init.c b/src/ft_md5_init.c
new file mode 100644
index 00000000..53aab185
--- /dev/null
+++ b/src/ft_md5_init.c
@@ -0,0 +1,10 @@
+#include "ft_md5.h"
+#include "libft.h"
+void ft_md5_init(t_md5_ctx *ctx)
+{
+    ctx->a = 0x67452301;
+    ctx->a = 0xefcdab89;
+    ctx->a = 0x98badcfe;
+    ctx->a = 0x10325476;
+    ft_bzero(ctx->buffer, FT_MD5_BUFFER_SIZE);
+}
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
index c9adfd03..dc7332de 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,9 +1,10 @@
 #include <stdio.h>
 #include <time.h>
 #include <string.h>
+#include "libft.h"
 
 #ifndef PROTOTYPES
-#define PROTOTYPES 0
+#define PROTOTYPES 1
 #endif
 
 /* PROTO_LIST is defined depending on how PROTOTYPES is defined above.
@@ -46,7 +47,7 @@ typedef unsigned char *POINTER;
 typedef unsigned short int UINT2;
 
 /* UINT4 defines a four byte word */
-typedef unsigned long int UINT4;
+typedef unsigned int UINT4;
 
 /* MD5 context. */
 typedef struct
@@ -66,7 +67,6 @@ void MD5Final PROTO_LIST((unsigned char[16], MD5_CTX *));
 #define TEST_BLOCK_COUNT 1000
 
 static void MDString PROTO_LIST((char *));
-static void MDTimeTrial PROTO_LIST((void));
 static void MDTestSuite PROTO_LIST((void));
 static void MDFile PROTO_LIST((char *));
 static void MDFilter PROTO_LIST((void));
@@ -127,8 +127,7 @@ Rotation is separate from addition to prevent recomputation.
 
 /* MD5 initialization. Begins an MD5 operation, writing a new context.
  */
-void MD5Init(context)
-	MD5_CTX *context; /* context */
+void MD5Init(MD5_CTX *context)
 {
 	context->count[0] = context->count[1] = 0;
 	/* Load magic initialization constants.*/
@@ -136,16 +135,14 @@ void MD5Init(context)
 	context->state[1] = 0xefcdab89;
 	context->state[2] = 0x98badcfe;
 	context->state[3] = 0x10325476;
+	ft_bzero(context->buffer, 64);
 }
 
 /* MD5 block update operation. Continues an MD5 message-digest
   operation, processing another message block, and updating the
   context.
  */
-void MD5Update(context, input, inputLen)
-	MD5_CTX *context;  /* context */
-	unsigned char *input;  /* input block */
-	unsigned int inputLen; /* length of input block */
+void MD5Update(MD5_CTX *context, unsigned char *input, unsigned int inputLen)
 {
 	unsigned int i, index, partLen;
 
@@ -181,9 +178,7 @@ void MD5Update(context, input, inputLen)
 /* MD5 finalization. Ends an MD5 message-digest operation, writing the
   the message digest and zeroizing the context.
  */
-void MD5Final(digest, context) 
-unsigned char digest[16]; 								 /* message digest */
-MD5_CTX *context;										 /* context */
+void MD5Final(unsigned char digest[16], MD5_CTX *context)
 {
 	unsigned char bits[8];
 	unsigned int index, padLen;
@@ -202,15 +197,14 @@ MD5_CTX *context;										 /* context */
 	/* Store state in digest */
 	Encode(digest, context->state, 16);
 
-	/* Zeroize sensitive information.
-*/
+	/* Zeroize sensitive information.*/
 	MD5_memset((POINTER)context, 0, sizeof(*context));
 }
 
 /* MD5 basic transformation. Transforms state based on block.
  */
 static void MD5Transform(state, block)
-	UINT4 state[4];
+UINT4 state[4];
 unsigned char block[64];
 {
 	UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
@@ -341,7 +335,7 @@ unsigned int len;
 		output[i] = input[i];
 }
 
-/* Note: Replace "for loop" with standard memset if possible.
+/* Note: Replace "for l
  */
 static void MD5_memset(output, value, len)
 	POINTER output;
@@ -363,7 +357,7 @@ static void MDString(string) char *string;
 	unsigned int len = strlen(string);
 
 	MDInit(&context);
-	MDUpdate(&context, string, len);
+	MDUpdate(&context, (unsigned char *)string, len);
 	MDFinal(digest, &context);
 
 	printf("MD5 (\"%s\") = ", string);
@@ -371,24 +365,88 @@ static void MDString(string) char *string;
 	printf("\n");
 }
 
-int main(argc, argv) 
-int argc;
-char *argv[];
+/* Digests the standard input and prints the result.
+ */
+static void MDFilter()
 {
-	int i;
+	MD_CTX context;
+	int len;
+	unsigned char buffer[16], digest[16];
+
+	MDInit(&context);
+	while ((len = fread(buffer, 1, 16, stdin)))
+		MDUpdate(&context, buffer, len);
+	MDFinal(digest, &context);
+
+	MDPrint(digest);
+	printf("\n");
+}
+
+/* Prints a message digest in hexadecimal.
+ */
+static void MDPrint(digest) unsigned char digest[16];
+{
+	unsigned int i;
+
+	for (i = 0; i < 16; i++)
+		printf("%02x", digest[i]);
+}
+
+static void MDFile(filename) char *filename;
+{
+	FILE *file;
+	MD_CTX context;
+	int len;
+	unsigned char buffer[1024], digest[16];
+
+	if ((file = fopen(filename, "rb")) == NULL)
+		printf("%s can't be opened\n", filename);
 
-	if (argc > 1)
-		for (i = 1; i < argc; i++)
-			if (argv[i][0] == '-' && argv[i][1] == 's')
-				MDString(argv[i] + 2);
-			else if (strcmp(argv[i], "-t") == 0)
-				MDTimeTrial();
-			else if (strcmp(argv[i], "-x") == 0)
-				MDTestSuite();
-			else
-				MDFile(argv[i]);
 	else
-		MDFilter();
+	{
+		MDInit(&context);
+		while ((len = fread(buffer, 1, 1024, file)))
+			MDUpdate(&context, buffer, len);
+		MDFinal(digest, &context);
 
-	return (0);
-}
\ No newline at end of file
+		fclose(file);
+
+		printf("MD5 (%s) = ", filename);
+		MDPrint(digest);
+		printf("\n");
+	}
+	}
+
+	/* Digests a reference suite of strings and prints the results.
+ */
+	static void MDTestSuite()
+	{
+		printf("MD5 test suite:\n");
+
+		MDString((char *)"");
+		MDString((char *)"a");
+		MDString((char *)"abc");
+		MDString((char *)"message digest");
+		MDString((char *)"abcdefghijklmnopqrstuvwxyz");
+		MDString((char *)"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789");
+		MDString((char *)"1234567890123456789012345678901234567890\
+1234567890123456789012345678901234567890");
+	}
+
+	int main(int argc, char **argv)
+	{
+		int i;
+
+		if (argc > 1)
+			for (i = 1; i < argc; i++)
+				if (argv[i][0] == '-' && argv[i][1] == 's')
+					MDString(argv[i] + 2);
+				else if (strcmp(argv[i], "-x") == 0)
+					MDTestSuite();
+				else
+					MDFile(argv[i]);
+		else
+			MDFilter();
+
+		return (0);
+	}
\ No newline at end of file
diff --git a/t/main_test.c b/t/main_test.c
deleted file mode 100644
index c4289b43..00000000
--- a/t/main_test.c
+++ /dev/null
@@ -1,21 +0,0 @@
-#include "tests.h"
-
-MunitTest test_tests[] = {
-	IT("/should_pass", should_pass, NULL, NULL, MUNIT_TEST_OPTION_NONE, NULL),
-	IT("/should_fail", should_fail, NULL, NULL, MUNIT_TEST_OPTION_NONE, NULL),
-	IT("/should_skip", should_skip, NULL, NULL, MUNIT_TEST_OPTION_NONE, NULL),
-	END_IT
-};
-
-static const MunitSuite suite = {
-	(char *)"/test_tests_suite",   	/* name */
-	test_tests,						/* tests */
-	NULL,							/* suites */
-	1,								/* iterations */
-	MUNIT_SUITE_OPTION_NONE			/* options */
-};
-
-int main(int argc, char** argv) 
-{
-	return munit_suite_main(&suite, NULL, argc, argv);
-}
diff --git a/t/md5_tests.c b/t/md5_tests.c
new file mode 100644
index 00000000..f398d29b
--- /dev/null
+++ b/t/md5_tests.c
@@ -0,0 +1,20 @@
+#include "tests.h"
+#include "ft_md5.h"
+
+TEST_RESULT should_init_ctx(TEST_PARAMS, TEST_DATA)
+{
+    UNUSED(test_params);
+    UNUSED(test_data);
+    t_md5_ctx ctx;
+
+    ft_md5_init(&ctx);
+
+    // munit_assert_true(ctx.a == 0x67452301);
+    // munit_assert_uint(ctx.b, ==, 0xefcdab89);
+    // munit_assert_uint(ctx.c, ==, 0x98badcfe);
+    // munit_assert_uint(ctx.d, ==, 0x10325476);
+    for (int i = 0; i < 64; i++)
+        munit_assert_uchar(ctx.buffer[i], ==, 0);
+
+    return MUNIT_OK;
+}
\ No newline at end of file
diff --git a/t/test_tests.c b/t/test_tests.c
deleted file mode 100644
index f1a3b833..00000000
--- a/t/test_tests.c
+++ /dev/null
@@ -1,23 +0,0 @@
-#include "tests.h"
-
-TEST_RESULT should_pass(TEST_PARAMS, TEST_DATA)
-{
-    UNUSED(test_params);
-    UNUSED(test_data);
-    return MUNIT_OK;
-}
-
-TEST_RESULT should_fail(TEST_PARAMS, TEST_DATA)
-{
-    UNUSED(test_params);
-    UNUSED(test_data);
-    return MUNIT_SKIP;
-    return MUNIT_FAIL;
-}
-
-TEST_RESULT should_skip(TEST_PARAMS, TEST_DATA)
-{
-    UNUSED(test_params);
-    UNUSED(test_data);
-    return MUNIT_SKIP;
-}
\ No newline at end of file
diff --git a/t/tests.c b/t/tests.c
new file mode 100644
index 00000000..efc0c3ae
--- /dev/null
+++ b/t/tests.c
@@ -0,0 +1,19 @@
+#include "tests.h"
+
+MunitTest md5_tests[] = {
+	IT("/zeroes_ctx", should_init_ctx, NULL, NULL, 0, NULL),
+	END_IT
+};
+
+static const MunitSuite suite = {
+	(char *)"/md5_suite",   		/* name */
+	md5_tests,						/* tests */
+	NULL,							/* suites */
+	1,								/* iterations */
+	MUNIT_SUITE_OPTION_NONE			/* options */
+};
+
+int main(int argc, char** argv) 
+{
+	return munit_suite_main(&suite, NULL, argc, argv);
+}
\ No newline at end of file