diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index a034c34..e9c1fac 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -3353,17 +3353,20 @@
 
 psa_status_t psa_asymmetric_encrypt(mbedtls_svc_key_id_t key,
                                     psa_algorithm_t alg,
-                                    const uint8_t *input,
+                                    const uint8_t *input_external,
                                     size_t input_length,
-                                    const uint8_t *salt,
+                                    const uint8_t *salt_external,
                                     size_t salt_length,
-                                    uint8_t *output,
+                                    uint8_t *output_external,
                                     size_t output_size,
                                     size_t *output_length)
 {
     psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
     psa_status_t unlock_status = PSA_ERROR_CORRUPTION_DETECTED;
     psa_key_slot_t *slot;
+    LOCAL_INPUT_DECLARE(input_external, input);
+    LOCAL_INPUT_DECLARE(salt_external, salt);
+    LOCAL_OUTPUT_DECLARE(output_external, output);
 
     (void) input;
     (void) input_length;
@@ -3406,6 +3409,9 @@
         }
 #endif /* defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PKCS1V15_CRYPT) ||
         * defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_OAEP) */
+        LOCAL_INPUT_ALLOC(input_external, input_length, input);
+        LOCAL_INPUT_ALLOC(salt_external, salt_length, salt);
+        LOCAL_OUTPUT_ALLOC(output_external, output_size, output);
         if (alg == PSA_ALG_RSA_PKCS1V15_CRYPT) {
 #if defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PKCS1V15_CRYPT)
             status = mbedtls_to_psa_error(
@@ -3456,22 +3462,29 @@
 exit:
     unlock_status = psa_unlock_key_slot(slot);
 
+    LOCAL_INPUT_FREE(input_external, input);
+    LOCAL_INPUT_FREE(salt_external, salt);
+    LOCAL_OUTPUT_FREE(output_external, output);
+
     return (status == PSA_SUCCESS) ? unlock_status : status;
 }
 
 psa_status_t psa_asymmetric_decrypt(mbedtls_svc_key_id_t key,
                                     psa_algorithm_t alg,
-                                    const uint8_t *input,
+                                    const uint8_t *input_external,
                                     size_t input_length,
-                                    const uint8_t *salt,
+                                    const uint8_t *salt_external,
                                     size_t salt_length,
-                                    uint8_t *output,
+                                    uint8_t *output_external,
                                     size_t output_size,
                                     size_t *output_length)
 {
     psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
     psa_status_t unlock_status = PSA_ERROR_CORRUPTION_DETECTED;
     psa_key_slot_t *slot;
+    LOCAL_INPUT_DECLARE(input_external, input);
+    LOCAL_INPUT_DECLARE(salt_external, salt);
+    LOCAL_OUTPUT_DECLARE(output_external, output);
 
     (void) input;
     (void) input_length;
@@ -3513,7 +3526,9 @@
         }
 #endif /* defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PKCS1V15_CRYPT) ||
         * defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_OAEP) */
-
+        LOCAL_INPUT_ALLOC(input_external, input_length, input);
+        LOCAL_INPUT_ALLOC(salt_external, salt_length, salt);
+        LOCAL_OUTPUT_ALLOC(output_external, output_size, output);
         if (alg == PSA_ALG_RSA_PKCS1V15_CRYPT) {
 #if defined(MBEDTLS_PSA_BUILTIN_ALG_RSA_PKCS1V15_CRYPT)
             status = mbedtls_to_psa_error(
@@ -3563,6 +3578,10 @@
 exit:
     unlock_status = psa_unlock_key_slot(slot);
 
+    LOCAL_INPUT_FREE(input_external, input);
+    LOCAL_INPUT_FREE(salt_external, salt);
+    LOCAL_OUTPUT_FREE(output_external, output);
+
     return (status == PSA_SUCCESS) ? unlock_status : status;
 }
 
diff --git a/tests/scripts/generate_psa_wrappers.py b/tests/scripts/generate_psa_wrappers.py
index e3842bf..12d34f9 100755
--- a/tests/scripts/generate_psa_wrappers.py
+++ b/tests/scripts/generate_psa_wrappers.py
@@ -179,6 +179,9 @@
                              'psa_mac_compute',
                              'psa_mac_verify'):
             return True
+        if function_name in ('psa_asymmetric_encrypt',
+                             'psa_asymmetric_decrypt'):
+            return True
         return False
 
     def _write_function_call(self, out: typing_util.Writable,
diff --git a/tests/src/psa_test_wrappers.c b/tests/src/psa_test_wrappers.c
index 1eaa36b..0f13cf5 100644
--- a/tests/src/psa_test_wrappers.c
+++ b/tests/src/psa_test_wrappers.c
@@ -124,7 +124,17 @@
     size_t arg7_output_size,
     size_t *arg8_output_length)
 {
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_POISON(arg2_input, arg3_input_length);
+    MBEDTLS_TEST_MEMORY_POISON(arg4_salt, arg5_salt_length);
+    MBEDTLS_TEST_MEMORY_POISON(arg6_output, arg7_output_size);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     psa_status_t status = (psa_asymmetric_decrypt)(arg0_key, arg1_alg, arg2_input, arg3_input_length, arg4_salt, arg5_salt_length, arg6_output, arg7_output_size, arg8_output_length);
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg2_input, arg3_input_length);
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg4_salt, arg5_salt_length);
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg6_output, arg7_output_size);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     return status;
 }
 
@@ -140,7 +150,17 @@
     size_t arg7_output_size,
     size_t *arg8_output_length)
 {
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_POISON(arg2_input, arg3_input_length);
+    MBEDTLS_TEST_MEMORY_POISON(arg4_salt, arg5_salt_length);
+    MBEDTLS_TEST_MEMORY_POISON(arg6_output, arg7_output_size);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     psa_status_t status = (psa_asymmetric_encrypt)(arg0_key, arg1_alg, arg2_input, arg3_input_length, arg4_salt, arg5_salt_length, arg6_output, arg7_output_size, arg8_output_length);
+#if defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS)
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg2_input, arg3_input_length);
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg4_salt, arg5_salt_length);
+    MBEDTLS_TEST_MEMORY_UNPOISON(arg6_output, arg7_output_size);
+#endif /* defined(MBEDTLS_PSA_COPY_CALLER_BUFFERS) */
     return status;
 }