diff --git a/library/md4.c b/library/md4.c
new file mode 100644
index 0000000..6fb9d68
--- /dev/null
+++ b/library/md4.c
@@ -0,0 +1,468 @@
+/*
+ *  RFC 1186/1320 compliant MD4 implementation
+ *
+ *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of Mbed Crypto (https://tls.mbed.org)
+ */
+/*
+ *  The MD4 algorithm was designed by Ron Rivest in 1990.
+ *
+ *  http://www.ietf.org/rfc/rfc1186.txt
+ *  http://www.ietf.org/rfc/rfc1320.txt
+ */
+
+#if !defined(MBEDCRYPTO_CONFIG_FILE)
+#include "mbedcrypto/config.h"
+#else
+#include MBEDCRYPTO_CONFIG_FILE
+#endif
+
+#if defined(MBEDCRYPTO_MD4_C)
+
+#include "mbedcrypto/md4.h"
+#include "mbedcrypto/platform_util.h"
+
+#include <string.h>
+
+#if defined(MBEDCRYPTO_SELF_TEST)
+#if defined(MBEDCRYPTO_PLATFORM_C)
+#include "mbedcrypto/platform.h"
+#else
+#include <stdio.h>
+#define mbedcrypto_printf printf
+#endif /* MBEDCRYPTO_PLATFORM_C */
+#endif /* MBEDCRYPTO_SELF_TEST */
+
+#if !defined(MBEDCRYPTO_MD4_ALT)
+
+/*
+ * 32-bit integer manipulation macros (little endian)
+ */
+#ifndef GET_UINT32_LE
+#define GET_UINT32_LE(n,b,i)                            \
+{                                                       \
+    (n) = ( (uint32_t) (b)[(i)    ]       )             \
+        | ( (uint32_t) (b)[(i) + 1] <<  8 )             \
+        | ( (uint32_t) (b)[(i) + 2] << 16 )             \
+        | ( (uint32_t) (b)[(i) + 3] << 24 );            \
+}
+#endif
+
+#ifndef PUT_UINT32_LE
+#define PUT_UINT32_LE(n,b,i)                                    \
+{                                                               \
+    (b)[(i)    ] = (unsigned char) ( ( (n)       ) & 0xFF );    \
+    (b)[(i) + 1] = (unsigned char) ( ( (n) >>  8 ) & 0xFF );    \
+    (b)[(i) + 2] = (unsigned char) ( ( (n) >> 16 ) & 0xFF );    \
+    (b)[(i) + 3] = (unsigned char) ( ( (n) >> 24 ) & 0xFF );    \
+}
+#endif
+
+void mbedcrypto_md4_init( mbedcrypto_md4_context *ctx )
+{
+    memset( ctx, 0, sizeof( mbedcrypto_md4_context ) );
+}
+
+void mbedcrypto_md4_free( mbedcrypto_md4_context *ctx )
+{
+    if( ctx == NULL )
+        return;
+
+    mbedcrypto_platform_zeroize( ctx, sizeof( mbedcrypto_md4_context ) );
+}
+
+void mbedcrypto_md4_clone( mbedcrypto_md4_context *dst,
+                        const mbedcrypto_md4_context *src )
+{
+    *dst = *src;
+}
+
+/*
+ * MD4 context setup
+ */
+int mbedcrypto_md4_starts_ret( mbedcrypto_md4_context *ctx )
+{
+    ctx->total[0] = 0;
+    ctx->total[1] = 0;
+
+    ctx->state[0] = 0x67452301;
+    ctx->state[1] = 0xEFCDAB89;
+    ctx->state[2] = 0x98BADCFE;
+    ctx->state[3] = 0x10325476;
+
+    return( 0 );
+}
+
+#if !defined(MBEDCRYPTO_DEPRECATED_REMOVED)
+void mbedcrypto_md4_starts( mbedcrypto_md4_context *ctx )
+{
+    mbedcrypto_md4_starts_ret( ctx );
+}
+#endif
+
+#if !defined(MBEDCRYPTO_MD4_PROCESS_ALT)
+int mbedcrypto_internal_md4_process( mbedcrypto_md4_context *ctx,
+                                  const unsigned char data[64] )
+{
+    uint32_t X[16], A, B, C, D;
+
+    GET_UINT32_LE( X[ 0], data,  0 );
+    GET_UINT32_LE( X[ 1], data,  4 );
+    GET_UINT32_LE( X[ 2], data,  8 );
+    GET_UINT32_LE( X[ 3], data, 12 );
+    GET_UINT32_LE( X[ 4], data, 16 );
+    GET_UINT32_LE( X[ 5], data, 20 );
+    GET_UINT32_LE( X[ 6], data, 24 );
+    GET_UINT32_LE( X[ 7], data, 28 );
+    GET_UINT32_LE( X[ 8], data, 32 );
+    GET_UINT32_LE( X[ 9], data, 36 );
+    GET_UINT32_LE( X[10], data, 40 );
+    GET_UINT32_LE( X[11], data, 44 );
+    GET_UINT32_LE( X[12], data, 48 );
+    GET_UINT32_LE( X[13], data, 52 );
+    GET_UINT32_LE( X[14], data, 56 );
+    GET_UINT32_LE( X[15], data, 60 );
+
+#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
+
+    A = ctx->state[0];
+    B = ctx->state[1];
+    C = ctx->state[2];
+    D = ctx->state[3];
+
+#define F(x, y, z) ((x & y) | ((~x) & z))
+#define P(a,b,c,d,x,s) { a += F(b,c,d) + x; a = S(a,s); }
+
+    P( A, B, C, D, X[ 0],  3 );
+    P( D, A, B, C, X[ 1],  7 );
+    P( C, D, A, B, X[ 2], 11 );
+    P( B, C, D, A, X[ 3], 19 );
+    P( A, B, C, D, X[ 4],  3 );
+    P( D, A, B, C, X[ 5],  7 );
+    P( C, D, A, B, X[ 6], 11 );
+    P( B, C, D, A, X[ 7], 19 );
+    P( A, B, C, D, X[ 8],  3 );
+    P( D, A, B, C, X[ 9],  7 );
+    P( C, D, A, B, X[10], 11 );
+    P( B, C, D, A, X[11], 19 );
+    P( A, B, C, D, X[12],  3 );
+    P( D, A, B, C, X[13],  7 );
+    P( C, D, A, B, X[14], 11 );
+    P( B, C, D, A, X[15], 19 );
+
+#undef P
+#undef F
+
+#define F(x,y,z) ((x & y) | (x & z) | (y & z))
+#define P(a,b,c,d,x,s) { a += F(b,c,d) + x + 0x5A827999; a = S(a,s); }
+
+    P( A, B, C, D, X[ 0],  3 );
+    P( D, A, B, C, X[ 4],  5 );
+    P( C, D, A, B, X[ 8],  9 );
+    P( B, C, D, A, X[12], 13 );
+    P( A, B, C, D, X[ 1],  3 );
+    P( D, A, B, C, X[ 5],  5 );
+    P( C, D, A, B, X[ 9],  9 );
+    P( B, C, D, A, X[13], 13 );
+    P( A, B, C, D, X[ 2],  3 );
+    P( D, A, B, C, X[ 6],  5 );
+    P( C, D, A, B, X[10],  9 );
+    P( B, C, D, A, X[14], 13 );
+    P( A, B, C, D, X[ 3],  3 );
+    P( D, A, B, C, X[ 7],  5 );
+    P( C, D, A, B, X[11],  9 );
+    P( B, C, D, A, X[15], 13 );
+
+#undef P
+#undef F
+
+#define F(x,y,z) (x ^ y ^ z)
+#define P(a,b,c,d,x,s) { a += F(b,c,d) + x + 0x6ED9EBA1; a = S(a,s); }
+
+    P( A, B, C, D, X[ 0],  3 );
+    P( D, A, B, C, X[ 8],  9 );
+    P( C, D, A, B, X[ 4], 11 );
+    P( B, C, D, A, X[12], 15 );
+    P( A, B, C, D, X[ 2],  3 );
+    P( D, A, B, C, X[10],  9 );
+    P( C, D, A, B, X[ 6], 11 );
+    P( B, C, D, A, X[14], 15 );
+    P( A, B, C, D, X[ 1],  3 );
+    P( D, A, B, C, X[ 9],  9 );
+    P( C, D, A, B, X[ 5], 11 );
+    P( B, C, D, A, X[13], 15 );
+    P( A, B, C, D, X[ 3],  3 );
+    P( D, A, B, C, X[11],  9 );
+    P( C, D, A, B, X[ 7], 11 );
+    P( B, C, D, A, X[15], 15 );
+
+#undef F
+#undef P
+
+    ctx->state[0] += A;
+    ctx->state[1] += B;
+    ctx->state[2] += C;
+    ctx->state[3] += D;
+
+    return( 0 );
+}
+
+#if !defined(MBEDCRYPTO_DEPRECATED_REMOVED)
+void mbedcrypto_md4_process( mbedcrypto_md4_context *ctx,
+                          const unsigned char data[64] )
+{
+    mbedcrypto_internal_md4_process( ctx, data );
+}
+#endif
+#endif /* !MBEDCRYPTO_MD4_PROCESS_ALT */
+
+/*
+ * MD4 process buffer
+ */
+int mbedcrypto_md4_update_ret( mbedcrypto_md4_context *ctx,
+                            const unsigned char *input,
+                            size_t ilen )
+{
+    int ret;
+    size_t fill;
+    uint32_t left;
+
+    if( ilen == 0 )
+        return( 0 );
+
+    left = ctx->total[0] & 0x3F;
+    fill = 64 - left;
+
+    ctx->total[0] += (uint32_t) ilen;
+    ctx->total[0] &= 0xFFFFFFFF;
+
+    if( ctx->total[0] < (uint32_t) ilen )
+        ctx->total[1]++;
+
+    if( left && ilen >= fill )
+    {
+        memcpy( (void *) (ctx->buffer + left),
+                (void *) input, fill );
+
+        if( ( ret = mbedcrypto_internal_md4_process( ctx, ctx->buffer ) ) != 0 )
+            return( ret );
+
+        input += fill;
+        ilen  -= fill;
+        left = 0;
+    }
+
+    while( ilen >= 64 )
+    {
+        if( ( ret = mbedcrypto_internal_md4_process( ctx, input ) ) != 0 )
+            return( ret );
+
+        input += 64;
+        ilen  -= 64;
+    }
+
+    if( ilen > 0 )
+    {
+        memcpy( (void *) (ctx->buffer + left),
+                (void *) input, ilen );
+    }
+
+    return( 0 );
+}
+
+#if !defined(MBEDCRYPTO_DEPRECATED_REMOVED)
+void mbedcrypto_md4_update( mbedcrypto_md4_context *ctx,
+                         const unsigned char *input,
+                         size_t ilen )
+{
+    mbedcrypto_md4_update_ret( ctx, input, ilen );
+}
+#endif
+
+static const unsigned char md4_padding[64] =
+{
+ 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+/*
+ * MD4 final digest
+ */
+int mbedcrypto_md4_finish_ret( mbedcrypto_md4_context *ctx,
+                            unsigned char output[16] )
+{
+    int ret;
+    uint32_t last, padn;
+    uint32_t high, low;
+    unsigned char msglen[8];
+
+    high = ( ctx->total[0] >> 29 )
+         | ( ctx->total[1] <<  3 );
+    low  = ( ctx->total[0] <<  3 );
+
+    PUT_UINT32_LE( low,  msglen, 0 );
+    PUT_UINT32_LE( high, msglen, 4 );
+
+    last = ctx->total[0] & 0x3F;
+    padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
+
+    ret = mbedcrypto_md4_update_ret( ctx, (unsigned char *)md4_padding, padn );
+    if( ret != 0 )
+        return( ret );
+
+    if( ( ret = mbedcrypto_md4_update_ret( ctx, msglen, 8 ) ) != 0 )
+        return( ret );
+
+
+    PUT_UINT32_LE( ctx->state[0], output,  0 );
+    PUT_UINT32_LE( ctx->state[1], output,  4 );
+    PUT_UINT32_LE( ctx->state[2], output,  8 );
+    PUT_UINT32_LE( ctx->state[3], output, 12 );
+
+    return( 0 );
+}
+
+#if !defined(MBEDCRYPTO_DEPRECATED_REMOVED)
+void mbedcrypto_md4_finish( mbedcrypto_md4_context *ctx,
+                         unsigned char output[16] )
+{
+    mbedcrypto_md4_finish_ret( ctx, output );
+}
+#endif
+
+#endif /* !MBEDCRYPTO_MD4_ALT */
+
+/*
+ * output = MD4( input buffer )
+ */
+int mbedcrypto_md4_ret( const unsigned char *input,
+                     size_t ilen,
+                     unsigned char output[16] )
+{
+    int ret;
+    mbedcrypto_md4_context ctx;
+
+    mbedcrypto_md4_init( &ctx );
+
+    if( ( ret = mbedcrypto_md4_starts_ret( &ctx ) ) != 0 )
+        goto exit;
+
+    if( ( ret = mbedcrypto_md4_update_ret( &ctx, input, ilen ) ) != 0 )
+        goto exit;
+
+    if( ( ret = mbedcrypto_md4_finish_ret( &ctx, output ) ) != 0 )
+        goto exit;
+
+exit:
+    mbedcrypto_md4_free( &ctx );
+
+    return( ret );
+}
+
+#if !defined(MBEDCRYPTO_DEPRECATED_REMOVED)
+void mbedcrypto_md4( const unsigned char *input,
+                  size_t ilen,
+                  unsigned char output[16] )
+{
+    mbedcrypto_md4_ret( input, ilen, output );
+}
+#endif
+
+#if defined(MBEDCRYPTO_SELF_TEST)
+
+/*
+ * RFC 1320 test vectors
+ */
+static const unsigned char md4_test_str[7][81] =
+{
+    { "" },
+    { "a" },
+    { "abc" },
+    { "message digest" },
+    { "abcdefghijklmnopqrstuvwxyz" },
+    { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" },
+    { "12345678901234567890123456789012345678901234567890123456789012"
+      "345678901234567890" }
+};
+
+static const size_t md4_test_strlen[7] =
+{
+    0, 1, 3, 14, 26, 62, 80
+};
+
+static const unsigned char md4_test_sum[7][16] =
+{
+    { 0x31, 0xD6, 0xCF, 0xE0, 0xD1, 0x6A, 0xE9, 0x31,
+      0xB7, 0x3C, 0x59, 0xD7, 0xE0, 0xC0, 0x89, 0xC0 },
+    { 0xBD, 0xE5, 0x2C, 0xB3, 0x1D, 0xE3, 0x3E, 0x46,
+      0x24, 0x5E, 0x05, 0xFB, 0xDB, 0xD6, 0xFB, 0x24 },
+    { 0xA4, 0x48, 0x01, 0x7A, 0xAF, 0x21, 0xD8, 0x52,
+      0x5F, 0xC1, 0x0A, 0xE8, 0x7A, 0xA6, 0x72, 0x9D },
+    { 0xD9, 0x13, 0x0A, 0x81, 0x64, 0x54, 0x9F, 0xE8,
+      0x18, 0x87, 0x48, 0x06, 0xE1, 0xC7, 0x01, 0x4B },
+    { 0xD7, 0x9E, 0x1C, 0x30, 0x8A, 0xA5, 0xBB, 0xCD,
+      0xEE, 0xA8, 0xED, 0x63, 0xDF, 0x41, 0x2D, 0xA9 },
+    { 0x04, 0x3F, 0x85, 0x82, 0xF2, 0x41, 0xDB, 0x35,
+      0x1C, 0xE6, 0x27, 0xE1, 0x53, 0xE7, 0xF0, 0xE4 },
+    { 0xE3, 0x3B, 0x4D, 0xDC, 0x9C, 0x38, 0xF2, 0x19,
+      0x9C, 0x3E, 0x7B, 0x16, 0x4F, 0xCC, 0x05, 0x36 }
+};
+
+/*
+ * Checkup routine
+ */
+int mbedcrypto_md4_self_test( int verbose )
+{
+    int i, ret = 0;
+    unsigned char md4sum[16];
+
+    for( i = 0; i < 7; i++ )
+    {
+        if( verbose != 0 )
+            mbedcrypto_printf( "  MD4 test #%d: ", i + 1 );
+
+        ret = mbedcrypto_md4_ret( md4_test_str[i], md4_test_strlen[i], md4sum );
+        if( ret != 0 )
+            goto fail;
+
+        if( memcmp( md4sum, md4_test_sum[i], 16 ) != 0 )
+        {
+            ret = 1;
+            goto fail;
+        }
+
+        if( verbose != 0 )
+            mbedcrypto_printf( "passed\n" );
+    }
+
+    if( verbose != 0 )
+        mbedcrypto_printf( "\n" );
+
+    return( 0 );
+
+fail:
+    if( verbose != 0 )
+        mbedcrypto_printf( "failed\n" );
+
+    return( ret );
+}
+
+#endif /* MBEDCRYPTO_SELF_TEST */
+
+#endif /* MBEDCRYPTO_MD4_C */