Philippe Reynes | cb69a81 | 2020-01-06 15:22:36 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Copyright (c) 2019 Philippe Reynes <philippe.reynes@softathome.com> |
| 4 | * |
| 5 | * Unit tests for aes functions |
| 6 | */ |
| 7 | |
Philippe Reynes | cb69a81 | 2020-01-06 15:22:36 +0100 | [diff] [blame] | 8 | #include <command.h> |
| 9 | #include <hexdump.h> |
Simon Glass | 274e0b0 | 2020-05-10 11:39:56 -0600 | [diff] [blame] | 10 | #include <rand.h> |
Philippe Reynes | cb69a81 | 2020-01-06 15:22:36 +0100 | [diff] [blame] | 11 | #include <uboot_aes.h> |
| 12 | #include <test/lib.h> |
| 13 | #include <test/test.h> |
| 14 | #include <test/ut.h> |
| 15 | |
| 16 | #define TEST_AES_ONE_BLOCK 0 |
| 17 | #define TEST_AES_CBC_CHAIN 1 |
| 18 | |
| 19 | struct test_aes_s { |
| 20 | int key_len; |
| 21 | int key_exp_len; |
| 22 | int type; |
| 23 | int num_block; |
| 24 | }; |
| 25 | |
| 26 | static struct test_aes_s test_aes[] = { |
| 27 | { AES128_KEY_LENGTH, AES128_EXPAND_KEY_LENGTH, TEST_AES_ONE_BLOCK, 1 }, |
| 28 | { AES128_KEY_LENGTH, AES128_EXPAND_KEY_LENGTH, TEST_AES_CBC_CHAIN, 16 }, |
Philippe Reynes | a6abf66 | 2020-01-06 15:22:37 +0100 | [diff] [blame] | 29 | { AES192_KEY_LENGTH, AES192_EXPAND_KEY_LENGTH, TEST_AES_ONE_BLOCK, 1 }, |
| 30 | { AES192_KEY_LENGTH, AES192_EXPAND_KEY_LENGTH, TEST_AES_CBC_CHAIN, 16 }, |
| 31 | { AES256_KEY_LENGTH, AES256_EXPAND_KEY_LENGTH, TEST_AES_ONE_BLOCK, 1 }, |
| 32 | { AES256_KEY_LENGTH, AES256_EXPAND_KEY_LENGTH, TEST_AES_CBC_CHAIN, 16 }, |
Philippe Reynes | cb69a81 | 2020-01-06 15:22:36 +0100 | [diff] [blame] | 33 | }; |
| 34 | |
| 35 | static void rand_buf(u8 *buf, int size) |
| 36 | { |
| 37 | int i; |
| 38 | |
| 39 | for (i = 0; i < size; i++) |
| 40 | buf[i] = rand() & 0xff; |
| 41 | } |
| 42 | |
| 43 | static int lib_test_aes_one_block(struct unit_test_state *uts, int key_len, |
| 44 | u8 *key_exp, u8 *iv, int num_block, |
| 45 | u8 *nocipher, u8 *ciphered, u8 *uncipher) |
| 46 | { |
| 47 | aes_encrypt(key_len, nocipher, key_exp, ciphered); |
| 48 | aes_decrypt(key_len, ciphered, key_exp, uncipher); |
| 49 | |
| 50 | ut_asserteq_mem(nocipher, uncipher, AES_BLOCK_LENGTH); |
| 51 | |
| 52 | /* corrupt the expanded key */ |
| 53 | key_exp[0]++; |
| 54 | aes_decrypt(key_len, ciphered, key_exp, uncipher); |
| 55 | ut_assertf(memcmp(nocipher, uncipher, AES_BLOCK_LENGTH), |
| 56 | "nocipher and uncipher should be different\n"); |
| 57 | |
| 58 | return 0; |
| 59 | } |
| 60 | |
| 61 | static int lib_test_aes_cbc_chain(struct unit_test_state *uts, int key_len, |
| 62 | u8 *key_exp, u8 *iv, int num_block, |
| 63 | u8 *nocipher, u8 *ciphered, u8 *uncipher) |
| 64 | { |
| 65 | aes_cbc_encrypt_blocks(key_len, key_exp, iv, |
| 66 | nocipher, ciphered, num_block); |
| 67 | aes_cbc_decrypt_blocks(key_len, key_exp, iv, |
| 68 | ciphered, uncipher, num_block); |
| 69 | |
| 70 | ut_asserteq_mem(nocipher, uncipher, num_block * AES_BLOCK_LENGTH); |
| 71 | |
| 72 | /* corrupt the expanded key */ |
| 73 | key_exp[0]++; |
| 74 | aes_cbc_decrypt_blocks(key_len, key_exp, iv, |
| 75 | ciphered, uncipher, num_block); |
| 76 | ut_assertf(memcmp(nocipher, uncipher, num_block * AES_BLOCK_LENGTH), |
| 77 | "nocipher and uncipher should be different\n"); |
| 78 | |
| 79 | return 0; |
| 80 | } |
| 81 | |
| 82 | static int _lib_test_aes_run(struct unit_test_state *uts, int key_len, |
| 83 | int key_exp_len, int type, int num_block) |
| 84 | { |
| 85 | u8 *key, *key_exp, *iv; |
| 86 | u8 *nocipher, *ciphered, *uncipher; |
| 87 | int ret; |
| 88 | |
| 89 | /* Allocate all the buffer */ |
| 90 | key = malloc(key_len); |
Philippe Reynes | cb69a81 | 2020-01-06 15:22:36 +0100 | [diff] [blame] | 91 | key_exp = malloc(key_exp_len); |
Philippe Reynes | cb69a81 | 2020-01-06 15:22:36 +0100 | [diff] [blame] | 92 | iv = malloc(AES_BLOCK_LENGTH); |
Philippe Reynes | cb69a81 | 2020-01-06 15:22:36 +0100 | [diff] [blame] | 93 | nocipher = malloc(num_block * AES_BLOCK_LENGTH); |
Philippe Reynes | cb69a81 | 2020-01-06 15:22:36 +0100 | [diff] [blame] | 94 | ciphered = malloc((num_block + 1) * AES_BLOCK_LENGTH); |
Philippe Reynes | cb69a81 | 2020-01-06 15:22:36 +0100 | [diff] [blame] | 95 | uncipher = malloc((num_block + 1) * AES_BLOCK_LENGTH); |
Philippe Reynes | 08bb9b7 | 2020-02-06 17:12:59 +0100 | [diff] [blame] | 96 | |
| 97 | if (!key || !key_exp || !iv || !nocipher || !ciphered || !uncipher) { |
| 98 | printf("%s: can't allocate memory\n", __func__); |
| 99 | ret = -1; |
| 100 | goto out; |
| 101 | } |
Philippe Reynes | cb69a81 | 2020-01-06 15:22:36 +0100 | [diff] [blame] | 102 | |
| 103 | /* Initialize all buffer */ |
| 104 | rand_buf(key, key_len); |
| 105 | rand_buf(iv, AES_BLOCK_LENGTH); |
| 106 | rand_buf(nocipher, num_block * AES_BLOCK_LENGTH); |
| 107 | memset(ciphered, 0, (num_block + 1) * AES_BLOCK_LENGTH); |
| 108 | memset(uncipher, 0, (num_block + 1) * AES_BLOCK_LENGTH); |
| 109 | |
| 110 | /* Expand the key */ |
| 111 | aes_expand_key(key, key_len, key_exp); |
| 112 | |
| 113 | /* Encrypt and decrypt */ |
| 114 | switch (type) { |
| 115 | case TEST_AES_ONE_BLOCK: |
| 116 | ret = lib_test_aes_one_block(uts, key_len, key_exp, iv, |
| 117 | num_block, nocipher, |
| 118 | ciphered, uncipher); |
| 119 | break; |
| 120 | case TEST_AES_CBC_CHAIN: |
| 121 | ret = lib_test_aes_cbc_chain(uts, key_len, key_exp, iv, |
| 122 | num_block, nocipher, |
| 123 | ciphered, uncipher); |
| 124 | break; |
| 125 | default: |
| 126 | printf("%s: unknown type (type=%d)\n", __func__, type); |
| 127 | ret = -1; |
| 128 | }; |
| 129 | |
Philippe Reynes | 08bb9b7 | 2020-02-06 17:12:59 +0100 | [diff] [blame] | 130 | out: |
Philippe Reynes | cb69a81 | 2020-01-06 15:22:36 +0100 | [diff] [blame] | 131 | /* Free all the data */ |
| 132 | free(key); |
| 133 | free(key_exp); |
| 134 | free(iv); |
| 135 | free(nocipher); |
| 136 | free(ciphered); |
| 137 | free(uncipher); |
| 138 | |
| 139 | return ret; |
| 140 | } |
| 141 | |
| 142 | static int lib_test_aes_run(struct unit_test_state *uts, |
| 143 | struct test_aes_s *test) |
| 144 | { |
| 145 | int key_len = test->key_len; |
| 146 | int key_exp_len = test->key_exp_len; |
| 147 | int type = test->type; |
| 148 | int num_block = test->num_block; |
| 149 | |
| 150 | return _lib_test_aes_run(uts, key_len, key_exp_len, |
| 151 | type, num_block); |
| 152 | } |
| 153 | |
| 154 | static int lib_test_aes(struct unit_test_state *uts) |
| 155 | { |
| 156 | int i, ret = 0; |
| 157 | |
| 158 | for (i = 0; i < ARRAY_SIZE(test_aes); i++) { |
| 159 | ret = lib_test_aes_run(uts, &test_aes[i]); |
| 160 | if (ret) |
| 161 | break; |
| 162 | } |
| 163 | |
| 164 | return ret; |
| 165 | } |
| 166 | |
| 167 | LIB_TEST(lib_test_aes, 0); |