27 void mbedtls_entropy_init(mbedtls_entropy_context *ctx)  in mbedtls_entropy_init()  argument
29     ctx->source_count = 0;  in mbedtls_entropy_init()
30     memset(ctx->source, 0, sizeof(ctx->source));  in mbedtls_entropy_init()
33     mbedtls_mutex_init(&ctx->mutex);  in mbedtls_entropy_init()
36     ctx->accumulator_started = 0;  in mbedtls_entropy_init()
37     mbedtls_md_init(&ctx->accumulator);  in mbedtls_entropy_init()
44     mbedtls_entropy_add_source(ctx, mbedtls_platform_entropy_poll, NULL,  in mbedtls_entropy_init()
49     mbedtls_entropy_add_source(ctx, mbedtls_hardware_poll, NULL,  in mbedtls_entropy_init()
54     mbedtls_entropy_add_source(ctx, mbedtls_nv_seed_poll, NULL,  in mbedtls_entropy_init()
57     ctx->initial_entropy_run = 0;  in mbedtls_entropy_init()
62 void mbedtls_entropy_free(mbedtls_entropy_context *ctx)  in mbedtls_entropy_free()  argument
64     if (ctx == NULL) {  in mbedtls_entropy_free()
70     if (ctx->accumulator_started == -1) {  in mbedtls_entropy_free()
75     mbedtls_mutex_free(&ctx->mutex);  in mbedtls_entropy_free()
77     mbedtls_md_free(&ctx->accumulator);  in mbedtls_entropy_free()
79     ctx->initial_entropy_run = 0;  in mbedtls_entropy_free()
81     ctx->source_count = 0;  in mbedtls_entropy_free()
82     mbedtls_platform_zeroize(ctx->source, sizeof(ctx->source));  in mbedtls_entropy_free()
83     ctx->accumulator_started = -1;  in mbedtls_entropy_free()
86 int mbedtls_entropy_add_source(mbedtls_entropy_context *ctx,  in mbedtls_entropy_add_source()  argument
93     if ((ret = mbedtls_mutex_lock(&ctx->mutex)) != 0) {  in mbedtls_entropy_add_source()
98     idx = ctx->source_count;  in mbedtls_entropy_add_source()
104     ctx->source[idx].f_source  = f_source;  in mbedtls_entropy_add_source()
105     ctx->source[idx].p_source  = p_source;  in mbedtls_entropy_add_source()
106     ctx->source[idx].threshold = threshold;  in mbedtls_entropy_add_source()
107     ctx->source[idx].strong    = strong;  in mbedtls_entropy_add_source()
109     ctx->source_count++;  in mbedtls_entropy_add_source()
113     if (mbedtls_mutex_unlock(&ctx->mutex) != 0) {  in mbedtls_entropy_add_source()
124 static int entropy_update(mbedtls_entropy_context *ctx, unsigned char source_id,  in entropy_update()  argument
150     if (ctx->accumulator_started == 0) {  in entropy_update()
151         ret = mbedtls_md_setup(&ctx->accumulator,  in entropy_update()
156         ret = mbedtls_md_starts(&ctx->accumulator);  in entropy_update()
160         ctx->accumulator_started = 1;  in entropy_update()
162     if ((ret = mbedtls_md_update(&ctx->accumulator, header, 2)) != 0) {  in entropy_update()
165     ret = mbedtls_md_update(&ctx->accumulator, p, use_len);  in entropy_update()
173 int mbedtls_entropy_update_manual(mbedtls_entropy_context *ctx,  in mbedtls_entropy_update_manual()  argument
179     if ((ret = mbedtls_mutex_lock(&ctx->mutex)) != 0) {  in mbedtls_entropy_update_manual()
184     ret = entropy_update(ctx, MBEDTLS_ENTROPY_SOURCE_MANUAL, data, len);  in mbedtls_entropy_update_manual()
187     if (mbedtls_mutex_unlock(&ctx->mutex) != 0) {  in mbedtls_entropy_update_manual()
198 static int entropy_gather_internal(mbedtls_entropy_context *ctx)  in entropy_gather_internal()  argument
206     if (ctx->source_count == 0) {  in entropy_gather_internal()
213     for (i = 0; i < ctx->source_count; i++) {  in entropy_gather_internal()
214         if (ctx->source[i].strong == MBEDTLS_ENTROPY_SOURCE_STRONG) {  in entropy_gather_internal()
219         if ((ret = ctx->source[i].f_source(ctx->source[i].p_source,  in entropy_gather_internal()
228             if ((ret = entropy_update(ctx, (unsigned char) i,  in entropy_gather_internal()
232             ctx->source[i].size += olen;  in entropy_gather_internal()
249 int mbedtls_entropy_gather(mbedtls_entropy_context *ctx)  in mbedtls_entropy_gather()  argument
254     if ((ret = mbedtls_mutex_lock(&ctx->mutex)) != 0) {  in mbedtls_entropy_gather()
259     ret = entropy_gather_internal(ctx);  in mbedtls_entropy_gather()
262     if (mbedtls_mutex_unlock(&ctx->mutex) != 0) {  in mbedtls_entropy_gather()
274     mbedtls_entropy_context *ctx = (mbedtls_entropy_context *) data;  in mbedtls_entropy_func()  local
285     if (ctx->initial_entropy_run == 0) {  in mbedtls_entropy_func()
286         ctx->initial_entropy_run = 1;  in mbedtls_entropy_func()
287         if ((ret = mbedtls_entropy_update_nv_seed(ctx)) != 0) {  in mbedtls_entropy_func()
294     if ((ret = mbedtls_mutex_lock(&ctx->mutex)) != 0) {  in mbedtls_entropy_func()
308         if ((ret = entropy_gather_internal(ctx)) != 0) {  in mbedtls_entropy_func()
314         for (i = 0; i < ctx->source_count; i++) {  in mbedtls_entropy_func()
315             if (ctx->source[i].size < ctx->source[i].threshold) {  in mbedtls_entropy_func()
318             if (ctx->source[i].strong == MBEDTLS_ENTROPY_SOURCE_STRONG) {  in mbedtls_entropy_func()
319                 strong_size += ctx->source[i].size;  in mbedtls_entropy_func()
331     if ((ret = mbedtls_md_finish(&ctx->accumulator, buf)) != 0) {  in mbedtls_entropy_func()
338     mbedtls_md_free(&ctx->accumulator);  in mbedtls_entropy_func()
339     mbedtls_md_init(&ctx->accumulator);  in mbedtls_entropy_func()
340     ret = mbedtls_md_setup(&ctx->accumulator,  in mbedtls_entropy_func()
345     ret = mbedtls_md_starts(&ctx->accumulator);  in mbedtls_entropy_func()
349     if ((ret = mbedtls_md_update(&ctx->accumulator, buf,  in mbedtls_entropy_func()
362     for (i = 0; i < ctx->source_count; i++) {  in mbedtls_entropy_func()
363         ctx->source[i].size = 0;  in mbedtls_entropy_func()
374     if (mbedtls_mutex_unlock(&ctx->mutex) != 0) {  in mbedtls_entropy_func()
383 int mbedtls_entropy_update_nv_seed(mbedtls_entropy_context *ctx)  in mbedtls_entropy_update_nv_seed()  argument
389     if ((ret = mbedtls_entropy_func(ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE)) != 0) {  in mbedtls_entropy_update_nv_seed()
399     ret = mbedtls_entropy_update_manual(ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE);  in mbedtls_entropy_update_nv_seed()
406 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()
442 int mbedtls_entropy_update_seed_file(mbedtls_entropy_context *ctx, const char *path)  in mbedtls_entropy_update_seed_file()  argument
467         ret = mbedtls_entropy_update_manual(ctx, buf, n);  in mbedtls_entropy_update_seed_file()
478     return mbedtls_entropy_write_seed_file(ctx, path);  in mbedtls_entropy_update_seed_file()
606     mbedtls_entropy_context ctx;  in mbedtls_entropy_self_test()  local
615     mbedtls_entropy_init(&ctx);  in mbedtls_entropy_self_test()
618     if ((ret = mbedtls_entropy_gather(&ctx)) != 0) {  in mbedtls_entropy_self_test()
622     ret = mbedtls_entropy_add_source(&ctx, entropy_dummy_source, NULL, 16,  in mbedtls_entropy_self_test()
628     if ((ret = mbedtls_entropy_update_manual(&ctx, buf, sizeof(buf))) != 0) {  in mbedtls_entropy_self_test()
641         if ((ret = mbedtls_entropy_func(&ctx, buf, sizeof(buf))) != 0) {  in mbedtls_entropy_self_test()
664     mbedtls_entropy_free(&ctx);  in mbedtls_entropy_self_test()