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Add unit tests for weak key and key parity checks

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Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de>
(Merged from https://github.com/openssl/openssl/pull/16953)
This commit is contained in:
Pauli 2021-11-03 10:34:36 +10:00
parent 8db9d07508
commit cc350c8822
1 changed files with 69 additions and 0 deletions
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69
test/destest.c
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@ -771,6 +771,73 @@ static int test_des_key_wrap(int idx)
EVP_CIPHER_CTX_free(ctx);
return res;
}
/*-
* Weak and semi weak keys as taken from
* %A D.W. Davies
* %A W.L. Price
* %T Security for Computer Networks
* %I John Wiley & Sons
* %D 1984
*/
static struct {
const DES_cblock key;
int expect;
} weak_keys[] = {
/* weak keys */
{{0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}, 1 },
{{0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE}, 1 },
{{0x1F, 0x1F, 0x1F, 0x1F, 0x0E, 0x0E, 0x0E, 0x0E}, 1 },
{{0xE0, 0xE0, 0xE0, 0xE0, 0xF1, 0xF1, 0xF1, 0xF1}, 1 },
/* semi-weak keys */
{{0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE}, 1 },
{{0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01, 0xFE, 0x01}, 1 },
{{0x1F, 0xE0, 0x1F, 0xE0, 0x0E, 0xF1, 0x0E, 0xF1}, 1 },
{{0xE0, 0x1F, 0xE0, 0x1F, 0xF1, 0x0E, 0xF1, 0x0E}, 1 },
{{0x01, 0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1}, 1 },
{{0xE0, 0x01, 0xE0, 0x01, 0xF1, 0x01, 0xF1, 0x01}, 1 },
{{0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E, 0xFE}, 1 },
{{0xFE, 0x1F, 0xFE, 0x1F, 0xFE, 0x0E, 0xFE, 0x0E}, 1 },
{{0x01, 0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E}, 1 },
{{0x1F, 0x01, 0x1F, 0x01, 0x0E, 0x01, 0x0E, 0x01}, 1 },
{{0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1, 0xFE}, 1 },
{{0xFE, 0xE0, 0xFE, 0xE0, 0xFE, 0xF1, 0xFE, 0xF1}, 1 },
/* good key */
{{0x49, 0xE9, 0x5D, 0x6D, 0x4C, 0xA2, 0x29, 0xBF}, 0 }
};
static int test_des_weak_keys(int n)
{
const_DES_cblock *key = (unsigned char (*)[8])weak_keys[n].key;
return TEST_int_eq(DES_is_weak_key(key), weak_keys[n].expect);
}
static struct {
const DES_cblock key;
int expect;
} bad_parity_keys[] = {
{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, 0 },
{{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, 0 },
/* Perturb each byte in turn to create even parity */
{{0x48, 0xE9, 0x5D, 0x6D, 0x4C, 0xA2, 0x29, 0xBF}, 0 },
{{0x49, 0xE8, 0x5D, 0x6D, 0x4C, 0xA2, 0x29, 0xBF}, 0 },
{{0x49, 0xE9, 0x5C, 0x6D, 0x4C, 0xA2, 0x29, 0xBF}, 0 },
{{0x49, 0xE9, 0x5D, 0x7D, 0x4C, 0xA2, 0x29, 0xBF}, 0 },
{{0x49, 0xE9, 0x5D, 0x6D, 0x5C, 0xA2, 0x29, 0xBF}, 0 },
{{0x49, 0xE9, 0x5D, 0x6D, 0x4C, 0xA3, 0x29, 0xBF}, 0 },
{{0x49, 0xE9, 0x5D, 0x6D, 0x4C, 0xA2, 0x39, 0xBF}, 0 },
{{0x49, 0xE9, 0x5D, 0x6D, 0x4C, 0xA2, 0x29, 0xBE}, 0 },
/* Odd parity version of above */
{{0x49, 0xE9, 0x5D, 0x6D, 0x4C, 0xA2, 0x29, 0xBF}, 1 }
};
static int test_des_check_bad_parity(int n)
{
const_DES_cblock *key = (unsigned char (*)[8])bad_parity_keys[n].key;
return TEST_int_eq(DES_check_key_parity(key), bad_parity_keys[n].expect);
}
#endif
int setup_tests(void)
@ -797,6 +864,8 @@ int setup_tests(void)
ADD_ALL_TESTS(test_input_align, 4);
ADD_ALL_TESTS(test_output_align, 4);
ADD_ALL_TESTS(test_des_key_wrap, OSSL_NELEM(test_des_key_wrap_sizes));
ADD_ALL_TESTS(test_des_weak_keys, OSSL_NELEM(weak_keys));
ADD_ALL_TESTS(test_des_check_bad_parity, OSSL_NELEM(bad_parity_keys));
#endif
return 1;
}