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Code Activity

Modified dlopen.c and tfpsacrypto_dlopen.c so that they use PSA API-only dynamic loading

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- Replaced soon-deprecated mbedtls_md_list() in dlopen.c with psa_hash_compute()
- Added tfpsacrypto_dlopen.c as a PSA-only shared-library loading test
- Enabled -fPIC for tf-psa-crypto builtins to support shared linking
- Confirmed clean builds and successful dlopen() test execution.

Signed-off-by: Ari Weiler-Ofek <ari.weiler-ofek@arm.com>
This commit is contained in:
Ari Weiler-Ofek
2025-06-17 15:18:20 +01:00
committed by Ari Weiler-Ofek
parent ba2376c580
commit abcfd4c160
1 changed files with 34 additions and 8 deletions
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42
programs/test/dlopen.c
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@@ -98,16 +98,42 @@ int main(void)
* "gcc -std=c99 -pedantic" complains about it, but it is perfectly
* fine on platforms that have dlsym(). */
#pragma GCC diagnostic ignored "-Wpedantic"
const int *(*md_list)(void) =
dlsym(crypto_so, "mbedtls_md_list");
psa_status_t (*dyn_psa_crypto_init)(void) =
dlsym(crypto_so, "psa_crypto_init");
psa_status_t (*dyn_psa_hash_compute)(psa_algorithm_t, const uint8_t *, size_t, uint8_t *,
size_t, size_t *) =
dlsym(crypto_so, "psa_hash_compute");
#pragma GCC diagnostic pop
CHECK_DLERROR("dlsym", "mbedtls_md_list");
const int *mds = md_list();
for (n = 0; mds[n] != 0; n++) {/* nothing to do, we're just counting */
;
/* Use psa_hash_compute from PSA Crypto API instead of deprecated mbedtls_md_list()
* to demonstrate runtime linking of libmbedcrypto / libtfpsacrypto */
CHECK_DLERROR("dlsym", "psa_crypto_init");
CHECK_DLERROR("dlsym", "psa_hash_compute");
psa_status_t status = dyn_psa_crypto_init();
if (status != PSA_SUCCESS) {
mbedtls_fprintf(stderr, "psa_crypto_init failed: %d\n", (int) status);
mbedtls_exit(MBEDTLS_EXIT_FAILURE);
}
mbedtls_printf("dlopen(%s): %u hashes\n",
crypto_so_filename, n);
const uint8_t input[] = "hello world";
uint8_t hash[32]; // Buffer to hold the output hash
size_t hash_len = 0;
status = dyn_psa_hash_compute(PSA_ALG_SHA_256,
input, sizeof(input) - 1,
hash, sizeof(hash),
&hash_len);
if (status != PSA_SUCCESS) {
mbedtls_fprintf(stderr, "psa_hash_compute failed: %d\n", (int) status);
mbedtls_exit(MBEDTLS_EXIT_FAILURE);
}
mbedtls_printf("dlopen(%s): psa_hash_compute succeeded. SHA-256 output length: %zu\n",
crypto_so_filename, hash_len);
dlclose(crypto_so);
CHECK_DLERROR("dlclose", crypto_so_filename);
#endif /* MBEDTLS_MD_C */