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| 1 | +/* |
| 2 | + * Copyright (c) 2016 Intel Corporation |
| 3 | + * |
| 4 | + * SPDX-License-Identifier: Apache-2.0 |
| 5 | + */ |
| 6 | + |
| 7 | +#include <zephyr/ztest.h> |
| 8 | + |
| 9 | +#include <psa/crypto.h> |
| 10 | +#include <zephyr/bluetooth/bluetooth.h> |
| 11 | +#include <zephyr/sys/reboot.h> |
| 12 | +#include <zephyr/logging/log.h> |
| 13 | + |
| 14 | +#define SAMPLE_KEY_ID PSA_KEY_ID_USER_MIN |
| 15 | +#define SAMPLE_KEY_TYPE PSA_KEY_TYPE_AES |
| 16 | +#define SAMPLE_ALG PSA_ALG_CTR |
| 17 | +#define SAMPLE_KEY_BITS 256 |
| 18 | + |
| 19 | +LOG_MODULE_REGISTER(psa_hci_integration_tests); |
| 20 | + |
| 21 | +psa_status_t generate_key_helper(psa_key_id_t* key_id, psa_algorithm_t algorithm, size_t key_bits); |
| 22 | + |
| 23 | +void setup_pre_reboot(){ |
| 24 | + // Use this function as a setup for the next testsuite that should simulate reboot |
| 25 | + psa_status_t ret; |
| 26 | + psa_key_id_t key_id; |
| 27 | + ret = generate_key_helper(&key_id, SAMPLE_ALG, SAMPLE_KEY_BITS); |
| 28 | + zassert_equal(ret, PSA_SUCCESS, "Key generation failed: %d", ret); |
| 29 | + |
| 30 | + // Don't destroy the key, but purge it for good measure |
| 31 | + ret = psa_purge_key(SAMPLE_KEY_ID); |
| 32 | + zassert_equal(ret, PSA_SUCCESS, "Failed to purge the key: %d", ret); |
| 33 | +} |
| 34 | + |
| 35 | +ZTEST_SUITE(psa_hci_integration_tests, NULL, NULL, NULL, NULL, setup_pre_reboot); |
| 36 | + |
| 37 | +static uint8_t plaintext[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xDE, 0xAD, 0xBE, 0xEF}; |
| 38 | +static uint8_t ciphertext[PSA_CIPHER_ENCRYPT_OUTPUT_SIZE(SAMPLE_KEY_TYPE, SAMPLE_ALG, |
| 39 | + sizeof(plaintext))]; |
| 40 | +static size_t ct_len; |
| 41 | + |
| 42 | +psa_status_t generate_key_helper(psa_key_id_t* key_id, psa_algorithm_t algorithm, size_t key_bits) { |
| 43 | + psa_key_attributes_t key_attributes = PSA_KEY_ATTRIBUTES_INIT; |
| 44 | + |
| 45 | + psa_set_key_lifetime(&key_attributes, PSA_KEY_LIFETIME_PERSISTENT); |
| 46 | + psa_set_key_usage_flags(&key_attributes, PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT); |
| 47 | + psa_set_key_id(&key_attributes, SAMPLE_KEY_ID); |
| 48 | + psa_set_key_type(&key_attributes, SAMPLE_KEY_TYPE); |
| 49 | + psa_set_key_algorithm(&key_attributes, algorithm); |
| 50 | + psa_set_key_bits(&key_attributes, key_bits); |
| 51 | + |
| 52 | + // //HACK: remove when the test is ready |
| 53 | + // psa_destroy_key(SAMPLE_KEY_ID); |
| 54 | + |
| 55 | + return psa_generate_key(&key_attributes, key_id); |
| 56 | +} |
| 57 | + |
| 58 | +ZTEST(psa_hci_integration_tests, test_psa_persistence_encrypt_decrypt) { |
| 59 | + psa_status_t ret; |
| 60 | + psa_key_id_t key_id; |
| 61 | + |
| 62 | + // Create a persistent signing key |
| 63 | + ret = generate_key_helper(&key_id, SAMPLE_ALG, SAMPLE_KEY_BITS); |
| 64 | + zassert_equal(ret, PSA_SUCCESS, "Key gen failed: %d", ret); |
| 65 | + |
| 66 | + ret = psa_cipher_encrypt(key_id, SAMPLE_ALG, plaintext, sizeof(plaintext), ciphertext, sizeof(ciphertext), &ct_len); |
| 67 | + |
| 68 | + LOG_INF("Encrypted %d bytes", ct_len); |
| 69 | + |
| 70 | + zassert_equal(ret, PSA_SUCCESS, "Encryption failed: %d", ret); |
| 71 | + |
| 72 | + // Purge key from volatile storage |
| 73 | + ret = psa_purge_key(SAMPLE_KEY_ID); |
| 74 | + zassert_equal(ret, PSA_SUCCESS, "Failed to purge the key: %d", ret); |
| 75 | + |
| 76 | + /* Open persisted key */ |
| 77 | + ret = psa_open_key(SAMPLE_KEY_ID, &key_id); |
| 78 | + zassert_equal(ret, PSA_SUCCESS, "Open failed: %d", ret); |
| 79 | + |
| 80 | + uint8_t decrypted[sizeof(plaintext)]; |
| 81 | + size_t dlen; |
| 82 | + |
| 83 | + /* Verify key usability */ |
| 84 | + ret = psa_cipher_decrypt( |
| 85 | + key_id, SAMPLE_ALG, |
| 86 | + ciphertext, ct_len, |
| 87 | + decrypted, sizeof(decrypted), &dlen |
| 88 | + ); |
| 89 | + zassert_equal(ret, PSA_SUCCESS, "Decrypt failed: %d", ret); |
| 90 | + zassert_mem_equal(plaintext, decrypted, sizeof(plaintext), |
| 91 | + "Data corrupted"); |
| 92 | + |
| 93 | + /* Cleanup */ |
| 94 | + psa_destroy_key(key_id); |
| 95 | +} |
| 96 | + |
| 97 | + |
| 98 | +ZTEST(psa_hci_integration_tests, test_psa_key_deletion_and_regeneration) { |
| 99 | + psa_status_t ret; |
| 100 | + psa_key_id_t key_id; |
| 101 | + |
| 102 | + // Generate the key |
| 103 | + ret = generate_key_helper(&key_id, SAMPLE_ALG, SAMPLE_KEY_BITS); |
| 104 | + zassert_equal(ret, PSA_SUCCESS, "Key generation failed: %d", ret); |
| 105 | + |
| 106 | + // Encrypt some data with the key |
| 107 | + ret = psa_cipher_encrypt(key_id, SAMPLE_ALG, plaintext, sizeof(plaintext), ciphertext, sizeof(ciphertext), &ct_len); |
| 108 | + zassert_equal(ret, PSA_SUCCESS, "Encryption failed: %d", ret); |
| 109 | + |
| 110 | + // Destroy the key |
| 111 | + ret = psa_destroy_key(key_id); |
| 112 | + zassert_equal(ret, PSA_SUCCESS, "Failed to destroy key: %d", ret); |
| 113 | + |
| 114 | + // Attempt to re-generate the key |
| 115 | + ret = generate_key_helper(&key_id, SAMPLE_ALG, SAMPLE_KEY_BITS); |
| 116 | + zassert_equal(ret, PSA_SUCCESS, "Key re-generation failed: %d", ret); |
| 117 | + |
| 118 | + // Attempt to decrypt the ciphertext encrypted using the different key (should fail) |
| 119 | + uint8_t decrypted[sizeof(plaintext)]; |
| 120 | + size_t dlen; |
| 121 | + ret = psa_cipher_decrypt(key_id, SAMPLE_ALG, ciphertext, ct_len, decrypted, sizeof(decrypted), &dlen); |
| 122 | + zassert_equal(ret, PSA_SUCCESS, "Decryption failed: %d", ret); |
| 123 | + zassert_true(memcmp(plaintext, decrypted, sizeof(plaintext)) != 0, "Decryption succeeded with a different key!"); |
| 124 | + |
| 125 | + // Cleanup |
| 126 | + psa_destroy_key(key_id); |
| 127 | +} |
| 128 | + |
| 129 | +ZTEST(psa_hci_integration_tests, test_psa_invalid_key_usage) { |
| 130 | + psa_status_t ret; |
| 131 | + |
| 132 | + // Try using an ungenerated key (should fail) |
| 133 | + psa_key_id_t bad_key_id = (psa_key_id_t)0xBAADBEEF; |
| 134 | + ret = psa_cipher_encrypt(bad_key_id, SAMPLE_ALG, plaintext, sizeof(plaintext), ciphertext, sizeof(ciphertext), &ct_len); |
| 135 | + zassert_equal(ret, PSA_ERROR_INVALID_HANDLE, "Expected failure due to invalid key handle"); |
| 136 | + |
| 137 | + // Try using a destroyed key |
| 138 | + psa_key_id_t key_id; |
| 139 | + ret = generate_key_helper(&key_id, SAMPLE_ALG, SAMPLE_KEY_BITS); |
| 140 | + zassert_equal(ret, PSA_SUCCESS, "Key generation failed: %d", ret); |
| 141 | + |
| 142 | + // Destroy the key |
| 143 | + ret = psa_destroy_key(key_id); |
| 144 | + zassert_equal(ret, PSA_SUCCESS, "Failed to destroy key: %d", ret); |
| 145 | + |
| 146 | + // Attempt to use the destroyed key (should fail) |
| 147 | + uint8_t decrypted[sizeof(plaintext)]; |
| 148 | + size_t dlen; |
| 149 | + ret = psa_cipher_decrypt(key_id, SAMPLE_ALG, ciphertext, ct_len, decrypted, sizeof(decrypted), &dlen); |
| 150 | + zassert_equal(ret, PSA_ERROR_INVALID_HANDLE, "Decryption should fail with invalid key"); |
| 151 | + |
| 152 | + // Cleanup |
| 153 | + psa_destroy_key(key_id); |
| 154 | +} |
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