| /* BEGIN_HEADER */ |
| #include <stdint.h> |
| #include <string.h> |
| |
| #include <psa/crypto.h> |
| |
| #include "mbedtls/entropy.h" |
| #include "entropy_poll.h" |
| |
| /* Calculating the minimum allowed entropy size in bytes */ |
| #define MBEDTLS_PSA_INJECT_ENTROPY_MIN_SIZE MAX(MBEDTLS_ENTROPY_MIN_PLATFORM, \ |
| MBEDTLS_ENTROPY_BLOCK_SIZE) |
| |
| #if defined(MBEDTLS_PSA_INJECT_ENTROPY) |
| |
| #if defined(MBEDTLS_PSA_ITS_FILE_C) |
| #include <stdio.h> |
| #else |
| #include <psa/internal_trusted_storage.h> |
| #endif |
| |
| /* Remove the entropy seed file. Since the library does not expose a way |
| * to do this (it would be a security risk if such a function was ever |
| * accessible in production), implement this functionality in a white-box |
| * manner. */ |
| psa_status_t remove_seed_file(void) |
| { |
| #if defined(MBEDTLS_PSA_ITS_FILE_C) |
| if (remove("00000000ffffff52.psa_its") == 0) { |
| return PSA_SUCCESS; |
| } else { |
| return PSA_ERROR_DOES_NOT_EXIST; |
| } |
| #else |
| return psa_its_remove(PSA_CRYPTO_ITS_RANDOM_SEED_UID); |
| #endif |
| } |
| |
| #endif /* MBEDTLS_PSA_INJECT_ENTROPY */ |
| |
| /* END_HEADER */ |
| |
| /* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG */ |
| void external_rng_failure_generate() |
| { |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| psa_set_key_type(&attributes, PSA_KEY_TYPE_DERIVE); |
| psa_set_key_bits(&attributes, 128); |
| mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT; |
| uint8_t output[1]; |
| |
| PSA_ASSERT(psa_crypto_init()); |
| |
| PSA_ASSERT(psa_generate_random(output, sizeof(output))); |
| PSA_ASSERT(psa_generate_key(&attributes, &key)); |
| PSA_ASSERT(psa_destroy_key(key)); |
| |
| mbedtls_test_disable_insecure_external_rng(); |
| TEST_EQUAL(PSA_ERROR_INSUFFICIENT_ENTROPY, |
| psa_generate_random(output, sizeof(output))); |
| TEST_EQUAL(PSA_ERROR_INSUFFICIENT_ENTROPY, |
| psa_generate_key(&attributes, &key)); |
| |
| exit: |
| psa_destroy_key(key); |
| PSA_DONE(); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE depends_on:MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG */ |
| void external_rng_failure_sign(int key_type, data_t *key_data, int alg, |
| int input_size_arg) |
| { |
| /* This test case is only expected to pass if the signature mechanism |
| * requires randomness, either because it is a randomized signature |
| * or because the implementation uses blinding. */ |
| |
| psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT; |
| psa_set_key_type(&attributes, key_type); |
| psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_SIGN_HASH); |
| psa_set_key_algorithm(&attributes, alg); |
| mbedtls_svc_key_id_t key = MBEDTLS_SVC_KEY_ID_INIT; |
| size_t input_size = input_size_arg; |
| uint8_t *input = NULL; |
| uint8_t *signature = NULL; |
| size_t signature_size = PSA_SIGNATURE_MAX_SIZE; |
| size_t signature_length; |
| |
| ASSERT_ALLOC(input, input_size); |
| ASSERT_ALLOC(signature, signature_size); |
| |
| PSA_ASSERT(psa_crypto_init()); |
| PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len, |
| &key)); |
| PSA_ASSERT(psa_sign_hash(key, alg, |
| input, input_size, |
| signature, signature_size, |
| &signature_length)); |
| PSA_ASSERT(psa_destroy_key(key)); |
| |
| mbedtls_test_disable_insecure_external_rng(); |
| /* Import the key again, because for RSA Mbed TLS caches blinding values |
| * in the key object and this could perturb the test. */ |
| PSA_ASSERT(psa_import_key(&attributes, key_data->x, key_data->len, |
| &key)); |
| TEST_EQUAL(PSA_ERROR_INSUFFICIENT_ENTROPY, |
| psa_sign_hash(key, alg, |
| input, input_size, |
| signature, signature_size, |
| &signature_length)); |
| PSA_ASSERT(psa_destroy_key(key)); |
| |
| exit: |
| psa_destroy_key(key); |
| PSA_DONE(); |
| mbedtls_free(input); |
| mbedtls_free(signature); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE depends_on:MBEDTLS_PSA_INJECT_ENTROPY */ |
| void validate_entropy_seed_injection(int seed_length_a, |
| int expected_status_a, |
| int seed_length_b, |
| int expected_status_b) |
| { |
| psa_status_t status; |
| uint8_t output[32] = { 0 }; |
| uint8_t zeros[32] = { 0 }; |
| uint8_t *seed = NULL; |
| int i; |
| int seed_size; |
| if (seed_length_a > seed_length_b) { |
| seed_size = seed_length_a; |
| } else { |
| seed_size = seed_length_b; |
| } |
| ASSERT_ALLOC(seed, seed_size); |
| /* fill seed with some data */ |
| for (i = 0; i < seed_size; ++i) { |
| seed[i] = i; |
| } |
| status = remove_seed_file(); |
| TEST_ASSERT((status == PSA_SUCCESS) || |
| (status == PSA_ERROR_DOES_NOT_EXIST)); |
| status = mbedtls_psa_inject_entropy(seed, seed_length_a); |
| TEST_EQUAL(status, expected_status_a); |
| status = mbedtls_psa_inject_entropy(seed, seed_length_b); |
| TEST_EQUAL(status, expected_status_b); |
| PSA_ASSERT(psa_crypto_init()); |
| PSA_ASSERT(psa_generate_random(output, |
| sizeof(output))); |
| TEST_ASSERT(memcmp(output, zeros, sizeof(output)) != 0); |
| exit: |
| mbedtls_free(seed); |
| remove_seed_file(); |
| PSA_DONE(); |
| } |
| /* END_CASE */ |
| |
| /* BEGIN_CASE depends_on:MBEDTLS_PSA_INJECT_ENTROPY */ |
| void run_entropy_inject_with_crypto_init() |
| { |
| psa_status_t status; |
| size_t i; |
| uint8_t seed[MBEDTLS_PSA_INJECT_ENTROPY_MIN_SIZE] = { 0 }; |
| /* fill seed with some data */ |
| for (i = 0; i < sizeof(seed); ++i) { |
| seed[i] = i; |
| } |
| status = remove_seed_file(); |
| TEST_ASSERT((status == PSA_SUCCESS) || |
| (status == PSA_ERROR_DOES_NOT_EXIST)); |
| status = mbedtls_psa_inject_entropy(seed, sizeof(seed)); |
| PSA_ASSERT(status); |
| status = remove_seed_file(); |
| TEST_EQUAL(status, PSA_SUCCESS); |
| status = psa_crypto_init(); |
| TEST_EQUAL(status, PSA_ERROR_INSUFFICIENT_ENTROPY); |
| status = mbedtls_psa_inject_entropy(seed, sizeof(seed)); |
| PSA_ASSERT(status); |
| status = psa_crypto_init(); |
| PSA_ASSERT(status); |
| PSA_DONE(); |
| /* The seed is written by nv_seed callback functions therefore the injection will fail */ |
| status = mbedtls_psa_inject_entropy(seed, sizeof(seed)); |
| TEST_EQUAL(status, PSA_ERROR_NOT_PERMITTED); |
| exit: |
| remove_seed_file(); |
| PSA_DONE(); |
| } |
| /* END_CASE */ |