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test_suite_psa_crypto_util: improve ecdsa_der_to_raw()

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Check that the parsing always fails if the input is truncated.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
This commit is contained in:
Valerio Setti 2024-02-05 17:59:42 +01:00
parent 1792bb44a0
commit 0e60e93c12
1 changed files with 21 additions and 6 deletions
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27
tests/suites/test_suite_psa_crypto_util.function
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@ -58,20 +58,35 @@ exit:
/* BEGIN_CASE depends_on:MBEDTLS_PSA_UTIL_HAVE_ECDSA */
void ecdsa_der_to_raw(int key_bits, data_t *input, data_t *exp_result, int exp_ret)
{
unsigned char *tmp_buf = NULL;
size_t tmp_buf_len = exp_result->len;
unsigned char *in_buf = NULL;
size_t in_buf_len;
unsigned char *out_buf = NULL;
size_t out_buf_len = exp_result->len;
size_t ret_len;
TEST_CALLOC(tmp_buf, tmp_buf_len);
TEST_CALLOC(out_buf, out_buf_len);
/* Verify that parsing of truncated input always fails. */
for (in_buf_len = 1; in_buf_len < input->len; in_buf_len++) {
/* We alloc a copy of input buffer with limited length so that sanitizers
* can detect overreads. */
TEST_CALLOC(in_buf, in_buf_len);
memcpy(in_buf, input->x, in_buf_len);
TEST_ASSERT(mbedtls_ecdsa_der_to_raw(key_bits, in_buf, in_buf_len,
out_buf, out_buf_len, &ret_len) != 0);
mbedtls_free(in_buf);
in_buf = NULL;
}
TEST_EQUAL(mbedtls_ecdsa_der_to_raw(key_bits, input->x, input->len,
tmp_buf, tmp_buf_len, &ret_len), exp_ret);
out_buf, out_buf_len, &ret_len), exp_ret);
if (exp_ret == 0) {
ASSERT_COMPARE(exp_result->x, exp_result->len, tmp_buf, ret_len);
ASSERT_COMPARE(exp_result->x, exp_result->len, out_buf, ret_len);
}
exit:
mbedtls_free(tmp_buf);
mbedtls_free(in_buf);
mbedtls_free(out_buf);
}
/* END_CASE */