programs: remove usage of mbedtls_pk_wrap_as_opaque() from tests

This is replaced with: mbedtls_pk_get_psa_attributes() +
mbedtls_pk_import_into_psa() + mbedtls_pk_setup_opaque().

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>

programs/ssl/ssl_client2.c

@@ -1711,11 +1711,10 @@ usage:
                                      &psa_alg, &psa_alg2,
                                      &usage,
                                      mbedtls_pk_get_type(&pkey)) == 0) {
-            ret = mbedtls_pk_wrap_as_opaque(&pkey, &key_slot, psa_alg,
+            ret = pk_wrap_as_opaque(&pkey, psa_alg, psa_alg2, usage, &key_slot);
-                                            usage, psa_alg2);
             if (ret != 0) {
                 mbedtls_printf(" failed\n  !  "
-                               "mbedtls_pk_wrap_as_opaque returned -0x%x\n\n",
+                               "mbedtls_pk_get_psa_attributes returned -0x%x\n\n",
                                (unsigned int)  -ret);
                 goto exit;
             }

programs/ssl/ssl_server2.c

@@ -2708,12 +2708,10 @@ usage:
                                      &psa_alg, &psa_alg2,
                                      &psa_usage,
                                      mbedtls_pk_get_type(&pkey)) == 0) {
-            ret = mbedtls_pk_wrap_as_opaque(&pkey, &key_slot,
+            ret = pk_wrap_as_opaque(&pkey, psa_alg, psa_alg2, psa_usage, &key_slot);
-                                            psa_alg, psa_usage, psa_alg2);
-
             if (ret != 0) {
                 mbedtls_printf(" failed\n  !  "
-                               "mbedtls_pk_wrap_as_opaque returned -0x%x\n\n",
+                               "pk_wrap_as_opaque returned -0x%x\n\n",
                                (unsigned int)  -ret);
                 goto exit;
             }
@@ -2727,12 +2725,10 @@ usage:
                                      &psa_alg, &psa_alg2,
                                      &psa_usage,
                                      mbedtls_pk_get_type(&pkey2)) == 0) {
-            ret = mbedtls_pk_wrap_as_opaque(&pkey2, &key_slot2,
+            ret = pk_wrap_as_opaque(&pkey2, psa_alg, psa_alg2, psa_usage, &key_slot2);
-                                            psa_alg, psa_usage, psa_alg2);
-
             if (ret != 0) {
                 mbedtls_printf(" failed\n  !  "
-                               "mbedtls_pk_wrap_as_opaque returned -0x%x\n\n",
+                               "mbedtls_pk_get_psa_attributes returned -0x%x\n\n",
                                (unsigned int)  -ret);
                 goto exit;
             }

programs/ssl/ssl_test_lib.c

@@ -274,6 +274,35 @@ int key_opaque_set_alg_usage(const char *alg1, const char *alg2,
 
     return 0;
 }
+
+int pk_wrap_as_opaque(mbedtls_pk_context *pk, psa_algorithm_t psa_alg, psa_algorithm_t psa_alg2,
+                      psa_key_usage_t psa_usage, mbedtls_svc_key_id_t *key_id)
+{
+    int ret;
+    psa_key_attributes_t key_attr = PSA_KEY_ATTRIBUTES_INIT;
+
+    ret = mbedtls_pk_get_psa_attributes(pk, PSA_KEY_USAGE_SIGN_HASH, &key_attr);
+    if (ret != 0) {
+        return ret;
+    }
+    psa_set_key_usage_flags(&key_attr, psa_usage);
+    psa_set_key_algorithm(&key_attr, psa_alg);
+    if (psa_alg2 != PSA_ALG_NONE) {
+        psa_set_key_enrollment_algorithm(&key_attr, psa_alg2);
+    }
+    ret = mbedtls_pk_import_into_psa(pk, &key_attr, key_id);
+    if (ret != 0) {
+        return ret;
+    }
+    mbedtls_pk_free(pk);
+    mbedtls_pk_init(pk);
+    ret = mbedtls_pk_setup_opaque(pk, *key_id);
+    if (ret != 0) {
+        return ret;
+    }
+
+    return 0;
+}
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
 #if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)

programs/ssl/ssl_test_lib.h

@@ -235,6 +235,29 @@ int key_opaque_set_alg_usage(const char *alg1, const char *alg2,
                              psa_algorithm_t *psa_alg2,
                              psa_key_usage_t *usage,
                              mbedtls_pk_type_t key_type);
+
+/** Turn a non-opaque PK context into an opaque one with folowing steps:
+ * - extract the key data and attributes from the PK context.
+ * - import the key material into PSA.
+ * - free the provided PK context and re-initilize it as an opaque PK context
+ *   wrapping the PSA key imported in the above step.
+ *
+ * \param[in/out] pk    On input the non-opaque PK context which contains the
+ *                      key to be wrapped. On output the re-initialized PK
+ *                      context which represents the opaque version of the one
+ *                      provided as input.
+ * \param[in] psa_alg   The primary algorithm that will be associated to the
+ *                      PSA key.
+ * \param[in] psa_alg2  The enrollment algorithm that will be associated to the
+ *                      PSA key.
+ * \param[in] psa_usage The PSA key usage policy.
+ * \param[out] key_id   The PSA key identifier of the imported key.
+ *
+ * \return              \c 0 on sucess.
+ * \return              \c -1 on failure.
+ */
+int pk_wrap_as_opaque(mbedtls_pk_context *pk, psa_algorithm_t psa_alg, psa_algorithm_t psa_alg2,
+                      psa_key_usage_t psa_usage, mbedtls_svc_key_id_t *key_id);
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO) && defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)