mbedtls/tests/suites/test_suite_psa_crypto_util.function

/* BEGIN_HEADER */
#include <test/helpers.h>
#include <mbedtls/psa_util.h>
/* END_HEADER */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_UTIL_HAVE_ECDSA */
void ecdsa_raw_to_der(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;
    size_t ret_len;

    TEST_CALLOC(tmp_buf, tmp_buf_len);

    TEST_EQUAL(mbedtls_ecdsa_raw_to_der(key_bits, input->x, input->len,
                                        tmp_buf, tmp_buf_len, &ret_len), exp_ret);

    if (exp_ret == 0) {
        ASSERT_COMPARE(exp_result->x, exp_result->len, tmp_buf, ret_len);
    }

exit:
    mbedtls_free(tmp_buf);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_PSA_UTIL_HAVE_ECDSA */
void ecdsa_raw_to_der_incremental(int key_bits, data_t *input, data_t *exp_result)
{
    unsigned char *tmp_buf = NULL;
    size_t ret_len;
    size_t i;

    /* Test with an output buffer smaller than required (expexted to fail). */
    for (i = 1; i < exp_result->len; i++) {
        TEST_CALLOC(tmp_buf, i);
        TEST_ASSERT(mbedtls_ecdsa_raw_to_der(key_bits, input->x, input->len,
                                             tmp_buf, i, &ret_len) != 0);
        mbedtls_free(tmp_buf);
        tmp_buf = NULL;
    }
    /* Test with an output buffer larger/equal than required (expexted to
     * succeed). */
    for (i = exp_result->len; i < (2 * exp_result->len); i++) {
        TEST_CALLOC(tmp_buf, i);
        TEST_ASSERT(mbedtls_ecdsa_raw_to_der(key_bits, input->x, input->len,
                                             tmp_buf, i, &ret_len) == 0);
        mbedtls_free(tmp_buf);
        tmp_buf = NULL;
    }

exit:
    mbedtls_free(tmp_buf);
}
/* END_CASE */

/* 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 *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(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,
                                        out_buf, out_buf_len, &ret_len), exp_ret);

    if (exp_ret == 0) {
        ASSERT_COMPARE(exp_result->x, exp_result->len, out_buf, ret_len);
    }

exit:
    mbedtls_free(in_buf);
    mbedtls_free(out_buf);
}
/* END_CASE */