diff --git a/libstb/Makefile.inc b/libstb/Makefile.inc
index c727518c1..1434b3d44 100644
--- a/libstb/Makefile.inc
+++ b/libstb/Makefile.inc
@@ -9,7 +9,6 @@ LIBSTB_OBJS = $(LIBSTB_SRCS:%.c=%.o)
 LIBSTB = $(LIBSTB_DIR)/built-in.a
 
 include $(SRC)/$(LIBSTB_DIR)/secvar/Makefile.inc
-include $(SRC)/$(LIBSTB_DIR)/mbedtls/Makefile.inc
 include $(SRC)/$(LIBSTB_DIR)/drivers/Makefile.inc
 include $(SRC)/$(LIBSTB_DIR)/tss/Makefile.inc
 include $(SRC)/$(LIBSTB_DIR)/crypto/Makefile.inc
diff --git a/libstb/mbedtls/Makefile.inc b/libstb/mbedtls/Makefile.inc
deleted file mode 100644
index deacd26c1..000000000
--- a/libstb/mbedtls/Makefile.inc
+++ /dev/null
@@ -1,11 +0,0 @@
-# -*-Makefile-*-
-
-MBEDTLS_DIR = libstb/mbedtls
-
-SUBDIRS += $(MBEDTLS_DIR)
-
-MBEDTLS_SRCS = sha512.c
-MBEDTLS_OBJS = $(MBEDTLS_SRCS:%.c=%.o)
-MBEDTLS = $(MBEDTLS_DIR)/built-in.a
-
-$(MBEDTLS): $(MBEDTLS_OBJS:%=$(MBEDTLS_DIR)/%)
diff --git a/libstb/mbedtls/sha512.c b/libstb/mbedtls/sha512.c
deleted file mode 100644
index a13379545..000000000
--- a/libstb/mbedtls/sha512.c
+++ /dev/null
@@ -1,480 +0,0 @@
-/*
- *  FIPS-180-2 compliant SHA-384/512 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 TLS (https://tls.mbed.org)
- */
-/*
- *  The SHA-512 Secure Hash Standard was published by NIST in 2002.
- *
- *  http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
- */
-
-#include "sha512.h"
-
-#define UL64(x) x
-
-#include <string.h>
-#include <stdio.h>
-#define mbedtls_printf printf
-
-#if !defined(MBEDTLS_SHA512_ALT)
-
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
-    volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
-
-/*
- * 64-bit integer manipulation macros (big endian)
- */
-#ifndef GET_UINT64_BE
-#define GET_UINT64_BE(n,b,i)                            \
-{                                                       \
-    (n) = ( (uint64_t) (b)[(i)    ] << 56 )       \
-        | ( (uint64_t) (b)[(i) + 1] << 48 )       \
-        | ( (uint64_t) (b)[(i) + 2] << 40 )       \
-        | ( (uint64_t) (b)[(i) + 3] << 32 )       \
-        | ( (uint64_t) (b)[(i) + 4] << 24 )       \
-        | ( (uint64_t) (b)[(i) + 5] << 16 )       \
-        | ( (uint64_t) (b)[(i) + 6] <<  8 )       \
-        | ( (uint64_t) (b)[(i) + 7]       );      \
-}
-#endif /* GET_UINT64_BE */
-
-#ifndef PUT_UINT64_BE
-#define PUT_UINT64_BE(n,b,i)                            \
-{                                                       \
-    (b)[(i)    ] = (unsigned char) ( (n) >> 56 );       \
-    (b)[(i) + 1] = (unsigned char) ( (n) >> 48 );       \
-    (b)[(i) + 2] = (unsigned char) ( (n) >> 40 );       \
-    (b)[(i) + 3] = (unsigned char) ( (n) >> 32 );       \
-    (b)[(i) + 4] = (unsigned char) ( (n) >> 24 );       \
-    (b)[(i) + 5] = (unsigned char) ( (n) >> 16 );       \
-    (b)[(i) + 6] = (unsigned char) ( (n) >>  8 );       \
-    (b)[(i) + 7] = (unsigned char) ( (n)       );       \
-}
-#endif /* PUT_UINT64_BE */
-
-void mbedtls_sha512_init( mbedtls_sha512_context *ctx )
-{
-    memset( ctx, 0, sizeof( mbedtls_sha512_context ) );
-}
-
-void mbedtls_sha512_free( mbedtls_sha512_context *ctx )
-{
-    if( ctx == NULL )
-        return;
-
-    mbedtls_zeroize( ctx, sizeof( mbedtls_sha512_context ) );
-}
-
-void mbedtls_sha512_clone( mbedtls_sha512_context *dst,
-                           const mbedtls_sha512_context *src )
-{
-    *dst = *src;
-}
-
-/*
- * SHA-512 context setup
- */
-void mbedtls_sha512_starts( mbedtls_sha512_context *ctx, int is384 )
-{
-    ctx->total[0] = 0;
-    ctx->total[1] = 0;
-
-    if( is384 == 0 )
-    {
-        /* SHA-512 */
-        ctx->state[0] = UL64(0x6A09E667F3BCC908);
-        ctx->state[1] = UL64(0xBB67AE8584CAA73B);
-        ctx->state[2] = UL64(0x3C6EF372FE94F82B);
-        ctx->state[3] = UL64(0xA54FF53A5F1D36F1);
-        ctx->state[4] = UL64(0x510E527FADE682D1);
-        ctx->state[5] = UL64(0x9B05688C2B3E6C1F);
-        ctx->state[6] = UL64(0x1F83D9ABFB41BD6B);
-        ctx->state[7] = UL64(0x5BE0CD19137E2179);
-    }
-    else
-    {
-        /* SHA-384 */
-        ctx->state[0] = UL64(0xCBBB9D5DC1059ED8);
-        ctx->state[1] = UL64(0x629A292A367CD507);
-        ctx->state[2] = UL64(0x9159015A3070DD17);
-        ctx->state[3] = UL64(0x152FECD8F70E5939);
-        ctx->state[4] = UL64(0x67332667FFC00B31);
-        ctx->state[5] = UL64(0x8EB44A8768581511);
-        ctx->state[6] = UL64(0xDB0C2E0D64F98FA7);
-        ctx->state[7] = UL64(0x47B5481DBEFA4FA4);
-    }
-
-    ctx->is384 = is384;
-}
-
-#if !defined(MBEDTLS_SHA512_PROCESS_ALT)
-
-/*
- * Round constants
- */
-static const uint64_t K[80] =
-{
-    UL64(0x428A2F98D728AE22),  UL64(0x7137449123EF65CD),
-    UL64(0xB5C0FBCFEC4D3B2F),  UL64(0xE9B5DBA58189DBBC),
-    UL64(0x3956C25BF348B538),  UL64(0x59F111F1B605D019),
-    UL64(0x923F82A4AF194F9B),  UL64(0xAB1C5ED5DA6D8118),
-    UL64(0xD807AA98A3030242),  UL64(0x12835B0145706FBE),
-    UL64(0x243185BE4EE4B28C),  UL64(0x550C7DC3D5FFB4E2),
-    UL64(0x72BE5D74F27B896F),  UL64(0x80DEB1FE3B1696B1),
-    UL64(0x9BDC06A725C71235),  UL64(0xC19BF174CF692694),
-    UL64(0xE49B69C19EF14AD2),  UL64(0xEFBE4786384F25E3),
-    UL64(0x0FC19DC68B8CD5B5),  UL64(0x240CA1CC77AC9C65),
-    UL64(0x2DE92C6F592B0275),  UL64(0x4A7484AA6EA6E483),
-    UL64(0x5CB0A9DCBD41FBD4),  UL64(0x76F988DA831153B5),
-    UL64(0x983E5152EE66DFAB),  UL64(0xA831C66D2DB43210),
-    UL64(0xB00327C898FB213F),  UL64(0xBF597FC7BEEF0EE4),
-    UL64(0xC6E00BF33DA88FC2),  UL64(0xD5A79147930AA725),
-    UL64(0x06CA6351E003826F),  UL64(0x142929670A0E6E70),
-    UL64(0x27B70A8546D22FFC),  UL64(0x2E1B21385C26C926),
-    UL64(0x4D2C6DFC5AC42AED),  UL64(0x53380D139D95B3DF),
-    UL64(0x650A73548BAF63DE),  UL64(0x766A0ABB3C77B2A8),
-    UL64(0x81C2C92E47EDAEE6),  UL64(0x92722C851482353B),
-    UL64(0xA2BFE8A14CF10364),  UL64(0xA81A664BBC423001),
-    UL64(0xC24B8B70D0F89791),  UL64(0xC76C51A30654BE30),
-    UL64(0xD192E819D6EF5218),  UL64(0xD69906245565A910),
-    UL64(0xF40E35855771202A),  UL64(0x106AA07032BBD1B8),
-    UL64(0x19A4C116B8D2D0C8),  UL64(0x1E376C085141AB53),
-    UL64(0x2748774CDF8EEB99),  UL64(0x34B0BCB5E19B48A8),
-    UL64(0x391C0CB3C5C95A63),  UL64(0x4ED8AA4AE3418ACB),
-    UL64(0x5B9CCA4F7763E373),  UL64(0x682E6FF3D6B2B8A3),
-    UL64(0x748F82EE5DEFB2FC),  UL64(0x78A5636F43172F60),
-    UL64(0x84C87814A1F0AB72),  UL64(0x8CC702081A6439EC),
-    UL64(0x90BEFFFA23631E28),  UL64(0xA4506CEBDE82BDE9),
-    UL64(0xBEF9A3F7B2C67915),  UL64(0xC67178F2E372532B),
-    UL64(0xCA273ECEEA26619C),  UL64(0xD186B8C721C0C207),
-    UL64(0xEADA7DD6CDE0EB1E),  UL64(0xF57D4F7FEE6ED178),
-    UL64(0x06F067AA72176FBA),  UL64(0x0A637DC5A2C898A6),
-    UL64(0x113F9804BEF90DAE),  UL64(0x1B710B35131C471B),
-    UL64(0x28DB77F523047D84),  UL64(0x32CAAB7B40C72493),
-    UL64(0x3C9EBE0A15C9BEBC),  UL64(0x431D67C49C100D4C),
-    UL64(0x4CC5D4BECB3E42B6),  UL64(0x597F299CFC657E2A),
-    UL64(0x5FCB6FAB3AD6FAEC),  UL64(0x6C44198C4A475817)
-};
-
-void mbedtls_sha512_process( mbedtls_sha512_context *ctx, const unsigned char data[128] )
-{
-    int i;
-    uint64_t temp1, temp2, W[80];
-    uint64_t A, B, C, D, E, F, G, H;
-
-#define  SHR(x,n) (x >> n)
-#define ROTR(x,n) (SHR(x,n) | (x << (64 - n)))
-
-#define S0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^  SHR(x, 7))
-#define S1(x) (ROTR(x,19) ^ ROTR(x,61) ^  SHR(x, 6))
-
-#define S2(x) (ROTR(x,28) ^ ROTR(x,34) ^ ROTR(x,39))
-#define S3(x) (ROTR(x,14) ^ ROTR(x,18) ^ ROTR(x,41))
-
-#define F0(x,y,z) ((x & y) | (z & (x | y)))
-#define F1(x,y,z) (z ^ (x & (y ^ z)))
-
-#define P(a,b,c,d,e,f,g,h,x,K)                  \
-{                                               \
-    temp1 = h + S3(e) + F1(e,f,g) + K + x;      \
-    temp2 = S2(a) + F0(a,b,c);                  \
-    d += temp1; h = temp1 + temp2;              \
-}
-
-    for( i = 0; i < 16; i++ )
-    {
-        GET_UINT64_BE( W[i], data, i << 3 );
-    }
-
-    for( ; i < 80; i++ )
-    {
-        W[i] = S1(W[i -  2]) + W[i -  7] +
-               S0(W[i - 15]) + W[i - 16];
-    }
-
-    A = ctx->state[0];
-    B = ctx->state[1];
-    C = ctx->state[2];
-    D = ctx->state[3];
-    E = ctx->state[4];
-    F = ctx->state[5];
-    G = ctx->state[6];
-    H = ctx->state[7];
-    i = 0;
-
-    do
-    {
-        P( A, B, C, D, E, F, G, H, W[i], K[i] ); i++;
-        P( H, A, B, C, D, E, F, G, W[i], K[i] ); i++;
-        P( G, H, A, B, C, D, E, F, W[i], K[i] ); i++;
-        P( F, G, H, A, B, C, D, E, W[i], K[i] ); i++;
-        P( E, F, G, H, A, B, C, D, W[i], K[i] ); i++;
-        P( D, E, F, G, H, A, B, C, W[i], K[i] ); i++;
-        P( C, D, E, F, G, H, A, B, W[i], K[i] ); i++;
-        P( B, C, D, E, F, G, H, A, W[i], K[i] ); i++;
-    }
-    while( i < 80 );
-
-    ctx->state[0] += A;
-    ctx->state[1] += B;
-    ctx->state[2] += C;
-    ctx->state[3] += D;
-    ctx->state[4] += E;
-    ctx->state[5] += F;
-    ctx->state[6] += G;
-    ctx->state[7] += H;
-}
-#endif /* !MBEDTLS_SHA512_PROCESS_ALT */
-
-/*
- * SHA-512 process buffer
- */
-void mbedtls_sha512_update( mbedtls_sha512_context *ctx, const unsigned char *input,
-                    size_t ilen )
-{
-    size_t fill;
-    unsigned int left;
-
-    if( ilen == 0 )
-        return;
-
-    left = (unsigned int) (ctx->total[0] & 0x7F);
-    fill = 128 - left;
-
-    ctx->total[0] += (uint64_t) ilen;
-
-    if( ctx->total[0] < (uint64_t) ilen )
-        ctx->total[1]++;
-
-    if( left && ilen >= fill )
-    {
-        memcpy( (void *) (ctx->buffer + left), input, fill );
-        mbedtls_sha512_process( ctx, ctx->buffer );
-        input += fill;
-        ilen  -= fill;
-        left = 0;
-    }
-
-    while( ilen >= 128 )
-    {
-        mbedtls_sha512_process( ctx, input );
-        input += 128;
-        ilen  -= 128;
-    }
-
-    if( ilen > 0 )
-        memcpy( (void *) (ctx->buffer + left), input, ilen );
-}
-
-static const unsigned char sha512_padding[128] =
-{
- 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,
-    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, 0
-};
-
-/*
- * SHA-512 final digest
- */
-void mbedtls_sha512_finish( mbedtls_sha512_context *ctx, unsigned char output[64] )
-{
-    size_t last, padn;
-    uint64_t high, low;
-    unsigned char msglen[16];
-
-    high = ( ctx->total[0] >> 61 )
-         | ( ctx->total[1] <<  3 );
-    low  = ( ctx->total[0] <<  3 );
-
-    PUT_UINT64_BE( high, msglen, 0 );
-    PUT_UINT64_BE( low,  msglen, 8 );
-
-    last = (size_t)( ctx->total[0] & 0x7F );
-    padn = ( last < 112 ) ? ( 112 - last ) : ( 240 - last );
-
-    mbedtls_sha512_update( ctx, sha512_padding, padn );
-    mbedtls_sha512_update( ctx, msglen, 16 );
-
-    PUT_UINT64_BE( ctx->state[0], output,  0 );
-    PUT_UINT64_BE( ctx->state[1], output,  8 );
-    PUT_UINT64_BE( ctx->state[2], output, 16 );
-    PUT_UINT64_BE( ctx->state[3], output, 24 );
-    PUT_UINT64_BE( ctx->state[4], output, 32 );
-    PUT_UINT64_BE( ctx->state[5], output, 40 );
-
-    if( ctx->is384 == 0 )
-    {
-        PUT_UINT64_BE( ctx->state[6], output, 48 );
-        PUT_UINT64_BE( ctx->state[7], output, 56 );
-    }
-}
-
-#endif /* !MBEDTLS_SHA512_ALT */
-
-/*
- * output = SHA-512( input buffer )
- */
-void mbedtls_sha512( const unsigned char *input, size_t ilen,
-             unsigned char output[64], int is384 )
-{
-    mbedtls_sha512_context ctx;
-
-    mbedtls_sha512_init( &ctx );
-    mbedtls_sha512_starts( &ctx, is384 );
-    mbedtls_sha512_update( &ctx, input, ilen );
-    mbedtls_sha512_finish( &ctx, output );
-    mbedtls_sha512_free( &ctx );
-}
-
-#if defined(MBEDTLS_SELF_TEST)
-
-/*
- * FIPS-180-2 test vectors
- */
-static const unsigned char sha512_test_buf[3][113] =
-{
-    { "abc" },
-    { "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"
-      "hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu" },
-    { "" }
-};
-
-static const int sha512_test_buflen[3] =
-{
-    3, 112, 1000
-};
-
-static const unsigned char sha512_test_sum[6][64] =
-{
-    /*
-     * SHA-384 test vectors
-     */
-    { 0xCB, 0x00, 0x75, 0x3F, 0x45, 0xA3, 0x5E, 0x8B,
-      0xB5, 0xA0, 0x3D, 0x69, 0x9A, 0xC6, 0x50, 0x07,
-      0x27, 0x2C, 0x32, 0xAB, 0x0E, 0xDE, 0xD1, 0x63,
-      0x1A, 0x8B, 0x60, 0x5A, 0x43, 0xFF, 0x5B, 0xED,
-      0x80, 0x86, 0x07, 0x2B, 0xA1, 0xE7, 0xCC, 0x23,
-      0x58, 0xBA, 0xEC, 0xA1, 0x34, 0xC8, 0x25, 0xA7 },
-    { 0x09, 0x33, 0x0C, 0x33, 0xF7, 0x11, 0x47, 0xE8,
-      0x3D, 0x19, 0x2F, 0xC7, 0x82, 0xCD, 0x1B, 0x47,
-      0x53, 0x11, 0x1B, 0x17, 0x3B, 0x3B, 0x05, 0xD2,
-      0x2F, 0xA0, 0x80, 0x86, 0xE3, 0xB0, 0xF7, 0x12,
-      0xFC, 0xC7, 0xC7, 0x1A, 0x55, 0x7E, 0x2D, 0xB9,
-      0x66, 0xC3, 0xE9, 0xFA, 0x91, 0x74, 0x60, 0x39 },
-    { 0x9D, 0x0E, 0x18, 0x09, 0x71, 0x64, 0x74, 0xCB,
-      0x08, 0x6E, 0x83, 0x4E, 0x31, 0x0A, 0x4A, 0x1C,
-      0xED, 0x14, 0x9E, 0x9C, 0x00, 0xF2, 0x48, 0x52,
-      0x79, 0x72, 0xCE, 0xC5, 0x70, 0x4C, 0x2A, 0x5B,
-      0x07, 0xB8, 0xB3, 0xDC, 0x38, 0xEC, 0xC4, 0xEB,
-      0xAE, 0x97, 0xDD, 0xD8, 0x7F, 0x3D, 0x89, 0x85 },
-
-    /*
-     * SHA-512 test vectors
-     */
-    { 0xDD, 0xAF, 0x35, 0xA1, 0x93, 0x61, 0x7A, 0xBA,
-      0xCC, 0x41, 0x73, 0x49, 0xAE, 0x20, 0x41, 0x31,
-      0x12, 0xE6, 0xFA, 0x4E, 0x89, 0xA9, 0x7E, 0xA2,
-      0x0A, 0x9E, 0xEE, 0xE6, 0x4B, 0x55, 0xD3, 0x9A,
-      0x21, 0x92, 0x99, 0x2A, 0x27, 0x4F, 0xC1, 0xA8,
-      0x36, 0xBA, 0x3C, 0x23, 0xA3, 0xFE, 0xEB, 0xBD,
-      0x45, 0x4D, 0x44, 0x23, 0x64, 0x3C, 0xE8, 0x0E,
-      0x2A, 0x9A, 0xC9, 0x4F, 0xA5, 0x4C, 0xA4, 0x9F },
-    { 0x8E, 0x95, 0x9B, 0x75, 0xDA, 0xE3, 0x13, 0xDA,
-      0x8C, 0xF4, 0xF7, 0x28, 0x14, 0xFC, 0x14, 0x3F,
-      0x8F, 0x77, 0x79, 0xC6, 0xEB, 0x9F, 0x7F, 0xA1,
-      0x72, 0x99, 0xAE, 0xAD, 0xB6, 0x88, 0x90, 0x18,
-      0x50, 0x1D, 0x28, 0x9E, 0x49, 0x00, 0xF7, 0xE4,
-      0x33, 0x1B, 0x99, 0xDE, 0xC4, 0xB5, 0x43, 0x3A,
-      0xC7, 0xD3, 0x29, 0xEE, 0xB6, 0xDD, 0x26, 0x54,
-      0x5E, 0x96, 0xE5, 0x5B, 0x87, 0x4B, 0xE9, 0x09 },
-    { 0xE7, 0x18, 0x48, 0x3D, 0x0C, 0xE7, 0x69, 0x64,
-      0x4E, 0x2E, 0x42, 0xC7, 0xBC, 0x15, 0xB4, 0x63,
-      0x8E, 0x1F, 0x98, 0xB1, 0x3B, 0x20, 0x44, 0x28,
-      0x56, 0x32, 0xA8, 0x03, 0xAF, 0xA9, 0x73, 0xEB,
-      0xDE, 0x0F, 0xF2, 0x44, 0x87, 0x7E, 0xA6, 0x0A,
-      0x4C, 0xB0, 0x43, 0x2C, 0xE5, 0x77, 0xC3, 0x1B,
-      0xEB, 0x00, 0x9C, 0x5C, 0x2C, 0x49, 0xAA, 0x2E,
-      0x4E, 0xAD, 0xB2, 0x17, 0xAD, 0x8C, 0xC0, 0x9B }
-};
-
-/*
- * Checkup routine
- */
-int mbedtls_sha512_self_test( int verbose )
-{
-    int i, j, k, buflen, ret = 0;
-    unsigned char buf[1024];
-    unsigned char sha512sum[64];
-    mbedtls_sha512_context ctx;
-
-    mbedtls_sha512_init( &ctx );
-
-    for( i = 0; i < 6; i++ )
-    {
-        j = i % 3;
-        k = i < 3;
-
-        if( verbose != 0 )
-            mbedtls_printf( "  SHA-%d test #%d: ", 512 - k * 128, j + 1 );
-
-        mbedtls_sha512_starts( &ctx, k );
-
-        if( j == 2 )
-        {
-            memset( buf, 'a', buflen = 1000 );
-
-            for( j = 0; j < 1000; j++ )
-                mbedtls_sha512_update( &ctx, buf, buflen );
-        }
-        else
-            mbedtls_sha512_update( &ctx, sha512_test_buf[j],
-                                 sha512_test_buflen[j] );
-
-        mbedtls_sha512_finish( &ctx, sha512sum );
-
-        if( memcmp( sha512sum, sha512_test_sum[i], 64 - k * 16 ) != 0 )
-        {
-            if( verbose != 0 )
-                mbedtls_printf( "failed\n" );
-
-            ret = 1;
-            goto exit;
-        }
-
-        if( verbose != 0 )
-            mbedtls_printf( "passed\n" );
-    }
-
-    if( verbose != 0 )
-        mbedtls_printf( "\n" );
-
-exit:
-    mbedtls_sha512_free( &ctx );
-
-    return( ret );
-}
-
-#endif /* MBEDTLS_SELF_TEST */
diff --git a/libstb/mbedtls/sha512.h b/libstb/mbedtls/sha512.h
deleted file mode 100644
index 627694f42..000000000
--- a/libstb/mbedtls/sha512.h
+++ /dev/null
@@ -1,141 +0,0 @@
-/**
- * \file sha512.h
- *
- * \brief SHA-384 and SHA-512 cryptographic hash function
- *
- *  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 TLS (https://tls.mbed.org)
- */
-#ifndef MBEDTLS_SHA512_H
-#define MBEDTLS_SHA512_H
-
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-#include <stddef.h>
-#include <stdint.h>
-
-#if !defined(MBEDTLS_SHA512_ALT)
-// Regular implementation
-//
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief          SHA-512 context structure
- */
-typedef struct
-{
-    uint64_t total[2];          /*!< number of bytes processed  */
-    uint64_t state[8];          /*!< intermediate digest state  */
-    unsigned char buffer[128];  /*!< data block being processed */
-    int is384;                  /*!< 0 => SHA-512, else SHA-384 */
-}
-mbedtls_sha512_context;
-
-/**
- * \brief          Initialize SHA-512 context
- *
- * \param ctx      SHA-512 context to be initialized
- */
-void mbedtls_sha512_init( mbedtls_sha512_context *ctx );
-
-/**
- * \brief          Clear SHA-512 context
- *
- * \param ctx      SHA-512 context to be cleared
- */
-void mbedtls_sha512_free( mbedtls_sha512_context *ctx );
-
-/**
- * \brief          Clone (the state of) a SHA-512 context
- *
- * \param dst      The destination context
- * \param src      The context to be cloned
- */
-void mbedtls_sha512_clone( mbedtls_sha512_context *dst,
-                           const mbedtls_sha512_context *src );
-
-/**
- * \brief          SHA-512 context setup
- *
- * \param ctx      context to be initialized
- * \param is384    0 = use SHA512, 1 = use SHA384
- */
-void mbedtls_sha512_starts( mbedtls_sha512_context *ctx, int is384 );
-
-/**
- * \brief          SHA-512 process buffer
- *
- * \param ctx      SHA-512 context
- * \param input    buffer holding the  data
- * \param ilen     length of the input data
- */
-void mbedtls_sha512_update( mbedtls_sha512_context *ctx, const unsigned char *input,
-                    size_t ilen );
-
-/**
- * \brief          SHA-512 final digest
- *
- * \param ctx      SHA-512 context
- * \param output   SHA-384/512 checksum result
- */
-void mbedtls_sha512_finish( mbedtls_sha512_context *ctx, unsigned char output[64] );
-
-#ifdef __cplusplus
-}
-#endif
-
-#else  /* MBEDTLS_SHA512_ALT */
-#include "sha512_alt.h"
-#endif /* MBEDTLS_SHA512_ALT */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * \brief          Output = SHA-512( input buffer )
- *
- * \param input    buffer holding the  data
- * \param ilen     length of the input data
- * \param output   SHA-384/512 checksum result
- * \param is384    0 = use SHA512, 1 = use SHA384
- */
-void mbedtls_sha512( const unsigned char *input, size_t ilen,
-             unsigned char output[64], int is384 );
-
-/**
- * \brief          Checkup routine
- *
- * \return         0 if successful, or 1 if the test failed
- */
-int mbedtls_sha512_self_test( int verbose );
-
-/* Internal use */
-void mbedtls_sha512_process( mbedtls_sha512_context *ctx, const unsigned char data[128] );
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* mbedtls_sha512.h */
