1 files changed, 0 insertions, 737 deletions

diff --git a/lib/mbedtls-2.27.0/library/entropy.c b/lib/mbedtls-2.27.0/library/entropy.c
deleted file mode 100644
index 12fd3b9..0000000
--- a/lib/mbedtls-2.27.0/library/entropy.c
+++ /dev/null
@@ -1,737 +0,0 @@
-/*
- *  Entropy accumulator implementation
- *
- *  Copyright The Mbed TLS Contributors
- *  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.
- */
-
-#include "common.h"
-
-#if defined(MBEDTLS_ENTROPY_C)
-
-#if defined(MBEDTLS_TEST_NULL_ENTROPY)
-#warning "**** WARNING!  MBEDTLS_TEST_NULL_ENTROPY defined! "
-#warning "**** THIS BUILD HAS NO DEFINED ENTROPY SOURCES "
-#warning "**** THIS BUILD IS *NOT* SUITABLE FOR PRODUCTION USE "
-#endif
-
-#include "mbedtls/entropy.h"
-#include "mbedtls/entropy_poll.h"
-#include "mbedtls/platform_util.h"
-#include "mbedtls/error.h"
-
-#include <string.h>
-
-#if defined(MBEDTLS_FS_IO)
-#include <stdio.h>
-#endif
-
-#if defined(MBEDTLS_ENTROPY_NV_SEED)
-#include "mbedtls/platform.h"
-#endif
-
-#if defined(MBEDTLS_SELF_TEST)
-#if defined(MBEDTLS_PLATFORM_C)
-#include "mbedtls/platform.h"
-#else
-#include <stdio.h>
-#define mbedtls_printf     printf
-#endif /* MBEDTLS_PLATFORM_C */
-#endif /* MBEDTLS_SELF_TEST */
-
-#if defined(MBEDTLS_HAVEGE_C)
-#include "mbedtls/havege.h"
-#endif
-
-#define ENTROPY_MAX_LOOP    256     /**< Maximum amount to loop before error */
-
-void mbedtls_entropy_init( mbedtls_entropy_context *ctx )
-{
-    ctx->source_count = 0;
-    memset( ctx->source, 0, sizeof( ctx->source ) );
-
-#if defined(MBEDTLS_THREADING_C)
-    mbedtls_mutex_init( &ctx->mutex );
-#endif
-
-    ctx->accumulator_started = 0;
-#if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
-    mbedtls_sha512_init( &ctx->accumulator );
-#else
-    mbedtls_sha256_init( &ctx->accumulator );
-#endif
-#if defined(MBEDTLS_HAVEGE_C)
-    mbedtls_havege_init( &ctx->havege_data );
-#endif
-
-    /* Reminder: Update ENTROPY_HAVE_STRONG in the test files
-     *           when adding more strong entropy sources here. */
-
-#if defined(MBEDTLS_TEST_NULL_ENTROPY)
-    mbedtls_entropy_add_source( ctx, mbedtls_null_entropy_poll, NULL,
-                                1, MBEDTLS_ENTROPY_SOURCE_STRONG );
-#endif
-
-#if !defined(MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES)
-#if !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
-    mbedtls_entropy_add_source( ctx, mbedtls_platform_entropy_poll, NULL,
-                                MBEDTLS_ENTROPY_MIN_PLATFORM,
-                                MBEDTLS_ENTROPY_SOURCE_STRONG );
-#endif
-#if defined(MBEDTLS_TIMING_C)
-    mbedtls_entropy_add_source( ctx, mbedtls_hardclock_poll, NULL,
-                                MBEDTLS_ENTROPY_MIN_HARDCLOCK,
-                                MBEDTLS_ENTROPY_SOURCE_WEAK );
-#endif
-#if defined(MBEDTLS_HAVEGE_C)
-    mbedtls_entropy_add_source( ctx, mbedtls_havege_poll, &ctx->havege_data,
-                                MBEDTLS_ENTROPY_MIN_HAVEGE,
-                                MBEDTLS_ENTROPY_SOURCE_STRONG );
-#endif
-#if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
-    mbedtls_entropy_add_source( ctx, mbedtls_hardware_poll, NULL,
-                                MBEDTLS_ENTROPY_MIN_HARDWARE,
-                                MBEDTLS_ENTROPY_SOURCE_STRONG );
-#endif
-#if defined(MBEDTLS_ENTROPY_NV_SEED)
-    mbedtls_entropy_add_source( ctx, mbedtls_nv_seed_poll, NULL,
-                                MBEDTLS_ENTROPY_BLOCK_SIZE,
-                                MBEDTLS_ENTROPY_SOURCE_STRONG );
-    ctx->initial_entropy_run = 0;
-#endif
-#endif /* MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES */
-}
-
-void mbedtls_entropy_free( mbedtls_entropy_context *ctx )
-{
-    /* If the context was already free, don't call free() again.
-     * This is important for mutexes which don't allow double-free. */
-    if( ctx->accumulator_started == -1 )
-        return;
-
-#if defined(MBEDTLS_HAVEGE_C)
-    mbedtls_havege_free( &ctx->havege_data );
-#endif
-#if defined(MBEDTLS_THREADING_C)
-    mbedtls_mutex_free( &ctx->mutex );
-#endif
-#if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
-    mbedtls_sha512_free( &ctx->accumulator );
-#else
-    mbedtls_sha256_free( &ctx->accumulator );
-#endif
-#if defined(MBEDTLS_ENTROPY_NV_SEED)
-    ctx->initial_entropy_run = 0;
-#endif
-    ctx->source_count = 0;
-    mbedtls_platform_zeroize( ctx->source, sizeof( ctx->source ) );
-    ctx->accumulator_started = -1;
-}
-
-int mbedtls_entropy_add_source( mbedtls_entropy_context *ctx,
-                        mbedtls_entropy_f_source_ptr f_source, void *p_source,
-                        size_t threshold, int strong )
-{
-    int idx, ret = 0;
-
-#if defined(MBEDTLS_THREADING_C)
-    if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
-        return( ret );
-#endif
-
-    idx = ctx->source_count;
-    if( idx >= MBEDTLS_ENTROPY_MAX_SOURCES )
-    {
-        ret = MBEDTLS_ERR_ENTROPY_MAX_SOURCES;
-        goto exit;
-    }
-
-    ctx->source[idx].f_source  = f_source;
-    ctx->source[idx].p_source  = p_source;
-    ctx->source[idx].threshold = threshold;
-    ctx->source[idx].strong    = strong;
-
-    ctx->source_count++;
-
-exit:
-#if defined(MBEDTLS_THREADING_C)
-    if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
-        return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
-#endif
-
-    return( ret );
-}
-
-/*
- * Entropy accumulator update
- */
-static int entropy_update( mbedtls_entropy_context *ctx, unsigned char source_id,
-                           const unsigned char *data, size_t len )
-{
-    unsigned char header[2];
-    unsigned char tmp[MBEDTLS_ENTROPY_BLOCK_SIZE];
-    size_t use_len = len;
-    const unsigned char *p = data;
-    int ret = 0;
-
-    if( use_len > MBEDTLS_ENTROPY_BLOCK_SIZE )
-    {
-#if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
-        if( ( ret = mbedtls_sha512_ret( data, len, tmp, 0 ) ) != 0 )
-            goto cleanup;
-#else
-        if( ( ret = mbedtls_sha256_ret( data, len, tmp, 0 ) ) != 0 )
-            goto cleanup;
-#endif
-        p = tmp;
-        use_len = MBEDTLS_ENTROPY_BLOCK_SIZE;
-    }
-
-    header[0] = source_id;
-    header[1] = use_len & 0xFF;
-
-    /*
-     * Start the accumulator if this has not already happened. Note that
-     * it is sufficient to start the accumulator here only because all calls to
-     * gather entropy eventually execute this code.
-     */
-#if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
-    if( ctx->accumulator_started == 0 &&
-        ( ret = mbedtls_sha512_starts_ret( &ctx->accumulator, 0 ) ) != 0 )
-        goto cleanup;
-    else
-        ctx->accumulator_started = 1;
-    if( ( ret = mbedtls_sha512_update_ret( &ctx->accumulator, header, 2 ) ) != 0 )
-        goto cleanup;
-    ret = mbedtls_sha512_update_ret( &ctx->accumulator, p, use_len );
-#else
-    if( ctx->accumulator_started == 0 &&
-        ( ret = mbedtls_sha256_starts_ret( &ctx->accumulator, 0 ) ) != 0 )
-        goto cleanup;
-    else
-        ctx->accumulator_started = 1;
-    if( ( ret = mbedtls_sha256_update_ret( &ctx->accumulator, header, 2 ) ) != 0 )
-        goto cleanup;
-    ret = mbedtls_sha256_update_ret( &ctx->accumulator, p, use_len );
-#endif
-
-cleanup:
-    mbedtls_platform_zeroize( tmp, sizeof( tmp ) );
-
-    return( ret );
-}
-
-int mbedtls_entropy_update_manual( mbedtls_entropy_context *ctx,
-                           const unsigned char *data, size_t len )
-{
-    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
-#if defined(MBEDTLS_THREADING_C)
-    if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
-        return( ret );
-#endif
-
-    ret = entropy_update( ctx, MBEDTLS_ENTROPY_SOURCE_MANUAL, data, len );
-
-#if defined(MBEDTLS_THREADING_C)
-    if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
-        return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
-#endif
-
-    return( ret );
-}
-
-/*
- * Run through the different sources to add entropy to our accumulator
- */
-static int entropy_gather_internal( mbedtls_entropy_context *ctx )
-{
-    int ret = MBEDTLS_ERR_ENTROPY_SOURCE_FAILED;
-    int i;
-    int have_one_strong = 0;
-    unsigned char buf[MBEDTLS_ENTROPY_MAX_GATHER];
-    size_t olen;
-
-    if( ctx->source_count == 0 )
-        return( MBEDTLS_ERR_ENTROPY_NO_SOURCES_DEFINED );
-
-    /*
-     * Run through our entropy sources
-     */
-    for( i = 0; i < ctx->source_count; i++ )
-    {
-        if( ctx->source[i].strong == MBEDTLS_ENTROPY_SOURCE_STRONG )
-            have_one_strong = 1;
-
-        olen = 0;
-        if( ( ret = ctx->source[i].f_source( ctx->source[i].p_source,
-                        buf, MBEDTLS_ENTROPY_MAX_GATHER, &olen ) ) != 0 )
-        {
-            goto cleanup;
-        }
-
-        /*
-         * Add if we actually gathered something
-         */
-        if( olen > 0 )
-        {
-            if( ( ret = entropy_update( ctx, (unsigned char) i,
-                                        buf, olen ) ) != 0 )
-                return( ret );
-            ctx->source[i].size += olen;
-        }
-    }
-
-    if( have_one_strong == 0 )
-        ret = MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE;
-
-cleanup:
-    mbedtls_platform_zeroize( buf, sizeof( buf ) );
-
-    return( ret );
-}
-
-/*
- * Thread-safe wrapper for entropy_gather_internal()
- */
-int mbedtls_entropy_gather( mbedtls_entropy_context *ctx )
-{
-    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-
-#if defined(MBEDTLS_THREADING_C)
-    if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
-        return( ret );
-#endif
-
-    ret = entropy_gather_internal( ctx );
-
-#if defined(MBEDTLS_THREADING_C)
-    if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
-        return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
-#endif
-
-    return( ret );
-}
-
-int mbedtls_entropy_func( void *data, unsigned char *output, size_t len )
-{
-    int ret, count = 0, i, thresholds_reached;
-    size_t strong_size;
-    mbedtls_entropy_context *ctx = (mbedtls_entropy_context *) data;
-    unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE];
-
-    if( len > MBEDTLS_ENTROPY_BLOCK_SIZE )
-        return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
-
-#if defined(MBEDTLS_ENTROPY_NV_SEED)
-    /* Update the NV entropy seed before generating any entropy for outside
-     * use.
-     */
-    if( ctx->initial_entropy_run == 0 )
-    {
-        ctx->initial_entropy_run = 1;
-        if( ( ret = mbedtls_entropy_update_nv_seed( ctx ) ) != 0 )
-            return( ret );
-    }
-#endif
-
-#if defined(MBEDTLS_THREADING_C)
-    if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
-        return( ret );
-#endif
-
-    /*
-     * Always gather extra entropy before a call
-     */
-    do
-    {
-        if( count++ > ENTROPY_MAX_LOOP )
-        {
-            ret = MBEDTLS_ERR_ENTROPY_SOURCE_FAILED;
-            goto exit;
-        }
-
-        if( ( ret = entropy_gather_internal( ctx ) ) != 0 )
-            goto exit;
-
-        thresholds_reached = 1;
-        strong_size = 0;
-        for( i = 0; i < ctx->source_count; i++ )
-        {
-            if( ctx->source[i].size < ctx->source[i].threshold )
-                thresholds_reached = 0;
-            if( ctx->source[i].strong == MBEDTLS_ENTROPY_SOURCE_STRONG )
-                strong_size += ctx->source[i].size;
-        }
-    }
-    while( ! thresholds_reached || strong_size < MBEDTLS_ENTROPY_BLOCK_SIZE );
-
-    memset( buf, 0, MBEDTLS_ENTROPY_BLOCK_SIZE );
-
-#if defined(MBEDTLS_ENTROPY_SHA512_ACCUMULATOR)
-    /*
-     * Note that at this stage it is assumed that the accumulator was started
-     * in a previous call to entropy_update(). If this is not guaranteed, the
-     * code below will fail.
-     */
-    if( ( ret = mbedtls_sha512_finish_ret( &ctx->accumulator, buf ) ) != 0 )
-        goto exit;
-
-    /*
-     * Reset accumulator and counters and recycle existing entropy
-     */
-    mbedtls_sha512_free( &ctx->accumulator );
-    mbedtls_sha512_init( &ctx->accumulator );
-    if( ( ret = mbedtls_sha512_starts_ret( &ctx->accumulator, 0 ) ) != 0 )
-        goto exit;
-    if( ( ret = mbedtls_sha512_update_ret( &ctx->accumulator, buf,
-                                           MBEDTLS_ENTROPY_BLOCK_SIZE ) ) != 0 )
-        goto exit;
-
-    /*
-     * Perform second SHA-512 on entropy
-     */
-    if( ( ret = mbedtls_sha512_ret( buf, MBEDTLS_ENTROPY_BLOCK_SIZE,
-                                    buf, 0 ) ) != 0 )
-        goto exit;
-#else /* MBEDTLS_ENTROPY_SHA512_ACCUMULATOR */
-    if( ( ret = mbedtls_sha256_finish_ret( &ctx->accumulator, buf ) ) != 0 )
-        goto exit;
-
-    /*
-     * Reset accumulator and counters and recycle existing entropy
-     */
-    mbedtls_sha256_free( &ctx->accumulator );
-    mbedtls_sha256_init( &ctx->accumulator );
-    if( ( ret = mbedtls_sha256_starts_ret( &ctx->accumulator, 0 ) ) != 0 )
-        goto exit;
-    if( ( ret = mbedtls_sha256_update_ret( &ctx->accumulator, buf,
-                                           MBEDTLS_ENTROPY_BLOCK_SIZE ) ) != 0 )
-        goto exit;
-
-    /*
-     * Perform second SHA-256 on entropy
-     */
-    if( ( ret = mbedtls_sha256_ret( buf, MBEDTLS_ENTROPY_BLOCK_SIZE,
-                                    buf, 0 ) ) != 0 )
-        goto exit;
-#endif /* MBEDTLS_ENTROPY_SHA512_ACCUMULATOR */
-
-    for( i = 0; i < ctx->source_count; i++ )
-        ctx->source[i].size = 0;
-
-    memcpy( output, buf, len );
-
-    ret = 0;
-
-exit:
-    mbedtls_platform_zeroize( buf, sizeof( buf ) );
-
-#if defined(MBEDTLS_THREADING_C)
-    if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
-        return( MBEDTLS_ERR_THREADING_MUTEX_ERROR );
-#endif
-
-    return( ret );
-}
-
-#if defined(MBEDTLS_ENTROPY_NV_SEED)
-int mbedtls_entropy_update_nv_seed( mbedtls_entropy_context *ctx )
-{
-    int ret = MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR;
-    unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE];
-
-    /* Read new seed  and write it to NV */
-    if( ( ret = mbedtls_entropy_func( ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE ) ) != 0 )
-        return( ret );
-
-    if( mbedtls_nv_seed_write( buf, MBEDTLS_ENTROPY_BLOCK_SIZE ) < 0 )
-        return( MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR );
-
-    /* Manually update the remaining stream with a separator value to diverge */
-    memset( buf, 0, MBEDTLS_ENTROPY_BLOCK_SIZE );
-    ret = mbedtls_entropy_update_manual( ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE );
-
-    return( ret );
-}
-#endif /* MBEDTLS_ENTROPY_NV_SEED */
-
-#if defined(MBEDTLS_FS_IO)
-int mbedtls_entropy_write_seed_file( mbedtls_entropy_context *ctx, const char *path )
-{
-    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
-    FILE *f = NULL;
-    unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE];
-
-    if( ( ret = mbedtls_entropy_func( ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE ) ) != 0 )
-    {
-        ret = MBEDTLS_ERR_ENTROPY_SOURCE_FAILED;
-        goto exit;
-    }
-
-    if( ( f = fopen( path, "wb" ) ) == NULL )
-    {
-        ret = MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR;
-        goto exit;
-    }
-
-    if( fwrite( buf, 1, MBEDTLS_ENTROPY_BLOCK_SIZE, f ) != MBEDTLS_ENTROPY_BLOCK_SIZE )
-    {
-        ret = MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR;
-        goto exit;
-    }
-
-    ret = 0;
-
-exit:
-    mbedtls_platform_zeroize( buf, sizeof( buf ) );
-
-    if( f != NULL )
-        fclose( f );
-
-    return( ret );
-}
-
-int mbedtls_entropy_update_seed_file( mbedtls_entropy_context *ctx, const char *path )
-{
-    int ret = 0;
-    FILE *f;
-    size_t n;
-    unsigned char buf[ MBEDTLS_ENTROPY_MAX_SEED_SIZE ];
-
-    if( ( f = fopen( path, "rb" ) ) == NULL )
-        return( MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR );
-
-    fseek( f, 0, SEEK_END );
-    n = (size_t) ftell( f );
-    fseek( f, 0, SEEK_SET );
-
-    if( n > MBEDTLS_ENTROPY_MAX_SEED_SIZE )
-        n = MBEDTLS_ENTROPY_MAX_SEED_SIZE;
-
-    if( fread( buf, 1, n, f ) != n )
-        ret = MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR;
-    else
-        ret = mbedtls_entropy_update_manual( ctx, buf, n );
-
-    fclose( f );
-
-    mbedtls_platform_zeroize( buf, sizeof( buf ) );
-
-    if( ret != 0 )
-        return( ret );
-
-    return( mbedtls_entropy_write_seed_file( ctx, path ) );
-}
-#endif /* MBEDTLS_FS_IO */
-
-#if defined(MBEDTLS_SELF_TEST)
-#if !defined(MBEDTLS_TEST_NULL_ENTROPY)
-/*
- * Dummy source function
- */
-static int entropy_dummy_source( void *data, unsigned char *output,
-                                 size_t len, size_t *olen )
-{
-    ((void) data);
-
-    memset( output, 0x2a, len );
-    *olen = len;
-
-    return( 0 );
-}
-#endif /* !MBEDTLS_TEST_NULL_ENTROPY */
-
-#if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
-
-static int mbedtls_entropy_source_self_test_gather( unsigned char *buf, size_t buf_len )
-{
-    int ret = 0;
-    size_t entropy_len = 0;
-    size_t olen = 0;
-    size_t attempts = buf_len;
-
-    while( attempts > 0 && entropy_len < buf_len )
-    {
-        if( ( ret = mbedtls_hardware_poll( NULL, buf + entropy_len,
-            buf_len - entropy_len, &olen ) ) != 0 )
-            return( ret );
-
-        entropy_len += olen;
-        attempts--;
-    }
-
-    if( entropy_len < buf_len )
-    {
-        ret = 1;
-    }
-
-    return( ret );
-}
-
-
-static int mbedtls_entropy_source_self_test_check_bits( const unsigned char *buf,
-                                                        size_t buf_len )
-{
-    unsigned char set= 0xFF;
-    unsigned char unset = 0x00;
-    size_t i;
-
-    for( i = 0; i < buf_len; i++ )
-    {
-        set &= buf[i];
-        unset |= buf[i];
-    }
-
-    return( set == 0xFF || unset == 0x00 );
-}
-
-/*
- * A test to ensure hat the entropy sources are functioning correctly
- * and there is no obvious failure. The test performs the following checks:
- *  - The entropy source is not providing only 0s (all bits unset) or 1s (all
- *    bits set).
- *  - The entropy source is not providing values in a pattern. Because the
- *    hardware could be providing data in an arbitrary length, this check polls
- *    the hardware entropy source twice and compares the result to ensure they
- *    are not equal.
- *  - The error code returned by the entropy source is not an error.
- */
-int mbedtls_entropy_source_self_test( int verbose )
-{
-    int ret = 0;
-    unsigned char buf0[2 * sizeof( unsigned long long int )];
-    unsigned char buf1[2 * sizeof( unsigned long long int )];
-
-    if( verbose != 0 )
-        mbedtls_printf( "  ENTROPY_BIAS test: " );
-
-    memset( buf0, 0x00, sizeof( buf0 ) );
-    memset( buf1, 0x00, sizeof( buf1 ) );
-
-    if( ( ret = mbedtls_entropy_source_self_test_gather( buf0, sizeof( buf0 ) ) ) != 0 )
-        goto cleanup;
-    if( ( ret = mbedtls_entropy_source_self_test_gather( buf1, sizeof( buf1 ) ) ) != 0 )
-        goto cleanup;
-
-    /* Make sure that the returned values are not all 0 or 1 */
-    if( ( ret = mbedtls_entropy_source_self_test_check_bits( buf0, sizeof( buf0 ) ) ) != 0 )
-        goto cleanup;
-    if( ( ret = mbedtls_entropy_source_self_test_check_bits( buf1, sizeof( buf1 ) ) ) != 0 )
-        goto cleanup;
-
-    /* Make sure that the entropy source is not returning values in a
-     * pattern */
-    ret = memcmp( buf0, buf1, sizeof( buf0 ) ) == 0;
-
-cleanup:
-    if( verbose != 0 )
-    {
-        if( ret != 0 )
-            mbedtls_printf( "failed\n" );
-        else
-            mbedtls_printf( "passed\n" );
-
-        mbedtls_printf( "\n" );
-    }
-
-    return( ret != 0 );
-}
-
-#endif /* MBEDTLS_ENTROPY_HARDWARE_ALT */
-
-/*
- * The actual entropy quality is hard to test, but we can at least
- * test that the functions don't cause errors and write the correct
- * amount of data to buffers.
- */
-int mbedtls_entropy_self_test( int verbose )
-{
-    int ret = 1;
-#if !defined(MBEDTLS_TEST_NULL_ENTROPY)
-    mbedtls_entropy_context ctx;
-    unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE] = { 0 };
-    unsigned char acc[MBEDTLS_ENTROPY_BLOCK_SIZE] = { 0 };
-    size_t i, j;
-#endif /* !MBEDTLS_TEST_NULL_ENTROPY */
-
-    if( verbose != 0 )
-        mbedtls_printf( "  ENTROPY test: " );
-
-#if !defined(MBEDTLS_TEST_NULL_ENTROPY)
-    mbedtls_entropy_init( &ctx );
-
-    /* First do a gather to make sure we have default sources */
-    if( ( ret = mbedtls_entropy_gather( &ctx ) ) != 0 )
-        goto cleanup;
-
-    ret = mbedtls_entropy_add_source( &ctx, entropy_dummy_source, NULL, 16,
-                                      MBEDTLS_ENTROPY_SOURCE_WEAK );
-    if( ret != 0 )
-        goto cleanup;
-
-    if( ( ret = mbedtls_entropy_update_manual( &ctx, buf, sizeof buf ) ) != 0 )
-        goto cleanup;
-
-    /*
-     * To test that mbedtls_entropy_func writes correct number of bytes:
-     * - use the whole buffer and rely on ASan to detect overruns
-     * - collect entropy 8 times and OR the result in an accumulator:
-     *   any byte should then be 0 with probably 2^(-64), so requiring
-     *   each of the 32 or 64 bytes to be non-zero has a false failure rate
-     *   of at most 2^(-58) which is acceptable.
-     */
-    for( i = 0; i < 8; i++ )
-    {
-        if( ( ret = mbedtls_entropy_func( &ctx, buf, sizeof( buf ) ) ) != 0 )
-            goto cleanup;
-
-        for( j = 0; j < sizeof( buf ); j++ )
-            acc[j] |= buf[j];
-    }
-
-    for( j = 0; j < sizeof( buf ); j++ )
-    {
-        if( acc[j] == 0 )
-        {
-            ret = 1;
-            goto cleanup;
-        }
-    }
-
-#if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
-    if( ( ret = mbedtls_entropy_source_self_test( 0 ) ) != 0 )
-        goto cleanup;
-#endif
-
-cleanup:
-    mbedtls_entropy_free( &ctx );
-#endif /* !MBEDTLS_TEST_NULL_ENTROPY */
-
-    if( verbose != 0 )
-    {
-        if( ret != 0 )
-            mbedtls_printf( "failed\n" );
-        else
-            mbedtls_printf( "passed\n" );
-
-        mbedtls_printf( "\n" );
-    }
-
-    return( ret != 0 );
-}
-#endif /* MBEDTLS_SELF_TEST */
-
-#endif /* MBEDTLS_ENTROPY_C */