69 void mbedtls_entropy_init( mbedtls_entropy_context *ctx )  in mbedtls_entropy_init()  argument
71     memset( ctx, 0, sizeof(mbedtls_entropy_context) );  in mbedtls_entropy_init()
74     mbedtls_mutex_init( &ctx->mutex );  in mbedtls_entropy_init()
78     mbedtls_sha512_starts( &ctx->accumulator, 0 );  in mbedtls_entropy_init()
80     mbedtls_sha256_starts( &ctx->accumulator, 0 );  in mbedtls_entropy_init()
83     mbedtls_havege_init( &ctx->havege_data );  in mbedtls_entropy_init()
87     mbedtls_entropy_add_source( ctx, mbedtls_null_entropy_poll, NULL,  in mbedtls_entropy_init()
93     mbedtls_entropy_add_source( ctx, mbedtls_platform_entropy_poll, NULL,  in mbedtls_entropy_init()
98     mbedtls_entropy_add_source( ctx, mbedtls_hardclock_poll, NULL,  in mbedtls_entropy_init()
103     mbedtls_entropy_add_source( ctx, mbedtls_havege_poll, &ctx->havege_data,  in mbedtls_entropy_init()
108     mbedtls_entropy_add_source( ctx, mbedtls_hardware_poll, NULL,  in mbedtls_entropy_init()
113     mbedtls_entropy_add_source( ctx, mbedtls_nv_seed_poll, NULL,  in mbedtls_entropy_init()
120 void mbedtls_entropy_free( mbedtls_entropy_context *ctx )  in mbedtls_entropy_free()  argument
123     mbedtls_havege_free( &ctx->havege_data );  in mbedtls_entropy_free()
126     mbedtls_mutex_free( &ctx->mutex );  in mbedtls_entropy_free()
128     mbedtls_zeroize( ctx, sizeof( mbedtls_entropy_context ) );  in mbedtls_entropy_free()
131 int mbedtls_entropy_add_source( mbedtls_entropy_context *ctx,  in mbedtls_entropy_add_source()  argument
138     if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )  in mbedtls_entropy_add_source()
142     index = ctx->source_count;  in mbedtls_entropy_add_source()
149     ctx->source[index].f_source  = f_source;  in mbedtls_entropy_add_source()
150     ctx->source[index].p_source  = p_source;  in mbedtls_entropy_add_source()
151     ctx->source[index].threshold = threshold;  in mbedtls_entropy_add_source()
152     ctx->source[index].strong    = strong;  in mbedtls_entropy_add_source()
154     ctx->source_count++;  in mbedtls_entropy_add_source()
158     if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )  in mbedtls_entropy_add_source()
168 static int entropy_update( mbedtls_entropy_context *ctx, unsigned char source_id,  in entropy_update()  argument
191     mbedtls_sha512_update( &ctx->accumulator, header, 2 );  in entropy_update()
192     mbedtls_sha512_update( &ctx->accumulator, p, use_len );  in entropy_update()
194     mbedtls_sha256_update( &ctx->accumulator, header, 2 );  in entropy_update()
195     mbedtls_sha256_update( &ctx->accumulator, p, use_len );  in entropy_update()
201 int mbedtls_entropy_update_manual( mbedtls_entropy_context *ctx,  in mbedtls_entropy_update_manual()  argument
207     if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )  in mbedtls_entropy_update_manual()
211     ret = entropy_update( ctx, MBEDTLS_ENTROPY_SOURCE_MANUAL, data, len );  in mbedtls_entropy_update_manual()
214     if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )  in mbedtls_entropy_update_manual()
224 static int entropy_gather_internal( mbedtls_entropy_context *ctx )  in entropy_gather_internal()  argument
230     if( ctx->source_count == 0 )  in entropy_gather_internal()
236     for( i = 0; i < ctx->source_count; i++ )  in entropy_gather_internal()
238         if( ctx->source[i].strong == MBEDTLS_ENTROPY_SOURCE_STRONG )  in entropy_gather_internal()
242         if( ( ret = ctx->source[i].f_source( ctx->source[i].p_source,  in entropy_gather_internal()
253             entropy_update( ctx, (unsigned char) i, buf, olen );  in entropy_gather_internal()
254             ctx->source[i].size += olen;  in entropy_gather_internal()
267 int mbedtls_entropy_gather( mbedtls_entropy_context *ctx )  in mbedtls_entropy_gather()  argument
272     if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )  in mbedtls_entropy_gather()
276     ret = entropy_gather_internal( ctx );  in mbedtls_entropy_gather()
279     if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )  in mbedtls_entropy_gather()
289     mbedtls_entropy_context *ctx = (mbedtls_entropy_context *) data;  in mbedtls_entropy_func()  local
299     if( ctx->initial_entropy_run == 0 )  in mbedtls_entropy_func()
301         ctx->initial_entropy_run = 1;  in mbedtls_entropy_func()
302         if( ( ret = mbedtls_entropy_update_nv_seed( ctx ) ) != 0 )  in mbedtls_entropy_func()
308     if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )  in mbedtls_entropy_func()
323         if( ( ret = entropy_gather_internal( ctx ) ) != 0 )  in mbedtls_entropy_func()
327         for( i = 0; i < ctx->source_count; i++ )  in mbedtls_entropy_func()
328             if( ctx->source[i].size < ctx->source[i].threshold )  in mbedtls_entropy_func()
336     mbedtls_sha512_finish( &ctx->accumulator, buf );  in mbedtls_entropy_func()
341     memset( &ctx->accumulator, 0, sizeof( mbedtls_sha512_context ) );  in mbedtls_entropy_func()
342     mbedtls_sha512_starts( &ctx->accumulator, 0 );  in mbedtls_entropy_func()
343     mbedtls_sha512_update( &ctx->accumulator, buf, MBEDTLS_ENTROPY_BLOCK_SIZE );  in mbedtls_entropy_func()
350     mbedtls_sha256_finish( &ctx->accumulator, buf );  in mbedtls_entropy_func()
355     memset( &ctx->accumulator, 0, sizeof( mbedtls_sha256_context ) );  in mbedtls_entropy_func()
356     mbedtls_sha256_starts( &ctx->accumulator, 0 );  in mbedtls_entropy_func()
357     mbedtls_sha256_update( &ctx->accumulator, buf, MBEDTLS_ENTROPY_BLOCK_SIZE );  in mbedtls_entropy_func()
365     for( i = 0; i < ctx->source_count; i++ )  in mbedtls_entropy_func()
366         ctx->source[i].size = 0;  in mbedtls_entropy_func()
374     if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )  in mbedtls_entropy_func()
382 int mbedtls_entropy_update_nv_seed( mbedtls_entropy_context *ctx )  in mbedtls_entropy_update_nv_seed()  argument
388     if( ( ret = mbedtls_entropy_func( ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE ) ) != 0 )  in mbedtls_entropy_update_nv_seed()
396     mbedtls_entropy_update_manual( ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE );  in mbedtls_entropy_update_nv_seed()
403 int mbedtls_entropy_write_seed_file( mbedtls_entropy_context *ctx, const char *path )  in mbedtls_entropy_write_seed_file()  argument
412     if( ( ret = mbedtls_entropy_func( ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE ) ) != 0 )  in mbedtls_entropy_write_seed_file()
428 int mbedtls_entropy_update_seed_file( mbedtls_entropy_context *ctx, const char *path )  in mbedtls_entropy_update_seed_file()  argument
452     mbedtls_entropy_update_manual( ctx, buf, n );  in mbedtls_entropy_update_seed_file()
454     return( mbedtls_entropy_write_seed_file( ctx, path ) );  in mbedtls_entropy_update_seed_file()
582     mbedtls_entropy_context ctx;  in mbedtls_entropy_self_test()  local
592     mbedtls_entropy_init( &ctx );  in mbedtls_entropy_self_test()
595     if( ( ret = mbedtls_entropy_gather( &ctx ) ) != 0 )  in mbedtls_entropy_self_test()
598     ret = mbedtls_entropy_add_source( &ctx, entropy_dummy_source, NULL, 16,  in mbedtls_entropy_self_test()
603     if( ( ret = mbedtls_entropy_update_manual( &ctx, buf, sizeof buf ) ) != 0 )  in mbedtls_entropy_self_test()
616         if( ( ret = mbedtls_entropy_func( &ctx, buf, sizeof( buf ) ) ) != 0 )  in mbedtls_entropy_self_test()
638     mbedtls_entropy_free( &ctx );  in mbedtls_entropy_self_test()