add the impementation of delete_key, delete_all_key for Legacy HAL

the new layer (Keymaster2PassthroughContext) will call the related function
operation, however, currently it’s null so it will have null pointer reference
issue and we need to provide them in the keymater legacy HAL.

Bug: 113084196
Change-Id: Id1b0df47c03d341aedc7a0634cb101966143641c

2 files changed, 43 insertions, 2 deletions

diff --git a/trusty/keymaster/include/trusty_keymaster/legacy/trusty_keymaster_device.h b/trusty/keymaster/include/trusty_keymaster/legacy/trusty_keymaster_device.h
index 5a80795e3..a483c0db6 100644
--- a/trusty/keymaster/include/trusty_keymaster/legacy/trusty_keymaster_device.h
+++ b/trusty/keymaster/include/trusty_keymaster/legacy/trusty_keymaster_device.h
@@ -80,6 +80,8 @@ class TrustyKeymasterDevice {
                              const keymaster_blob_t* input, const keymaster_blob_t* signature,
                              keymaster_key_param_set_t* out_params, keymaster_blob_t* output);
     keymaster_error_t abort(keymaster_operation_handle_t operation_handle);
+    keymaster_error_t delete_key(const keymaster_key_blob_t* key);
+    keymaster_error_t delete_all_keys();
 
   private:
     keymaster_error_t Send(uint32_t command, const Serializable& request,
diff --git a/trusty/keymaster/legacy/trusty_keymaster_device.cpp b/trusty/keymaster/legacy/trusty_keymaster_device.cpp
index ea00a92e0..6c0752275 100644
--- a/trusty/keymaster/legacy/trusty_keymaster_device.cpp
+++ b/trusty/keymaster/legacy/trusty_keymaster_device.cpp
@@ -70,8 +70,8 @@ TrustyKeymasterDevice::TrustyKeymasterDevice(const hw_module_t* module) {
     device_.export_key = export_key;
     device_.attest_key = attest_key;
     device_.upgrade_key = upgrade_key;
-    device_.delete_key = nullptr;
-    device_.delete_all_keys = nullptr;
+    device_.delete_key = delete_key;
+    device_.delete_all_keys = delete_all_keys;
     device_.begin = begin;
     device_.update = update;
     device_.finish = finish;
@@ -606,6 +606,34 @@ keymaster_error_t TrustyKeymasterDevice::abort(keymaster_operation_handle_t oper
     return trusty_keymaster_send(KM_ABORT_OPERATION, request, &response);
 }
 
+keymaster_error_t TrustyKeymasterDevice::delete_key(const keymaster_key_blob_t* key) {
+    ALOGD("Device received delete_key");
+
+    if (error_ != KM_ERROR_OK) {
+        return error_;
+    }
+
+    if (!key || !key->key_material)
+        return KM_ERROR_UNEXPECTED_NULL_POINTER;
+
+    DeleteKeyRequest request(message_version_);
+    request.SetKeyMaterial(*key);
+    DeleteKeyResponse response(message_version_);
+    return trusty_keymaster_send(KM_DELETE_KEY, request, &response);
+}
+
+keymaster_error_t TrustyKeymasterDevice::delete_all_keys() {
+    ALOGD("Device received delete_all_key");
+
+    if (error_ != KM_ERROR_OK) {
+        return error_;
+    }
+
+    DeleteAllKeysRequest request(message_version_);
+    DeleteAllKeysResponse response(message_version_);
+    return trusty_keymaster_send(KM_DELETE_ALL_KEYS, request, &response);
+}
+
 hw_device_t* TrustyKeymasterDevice::hw_device() {
     return &device_.common;
 }
@@ -719,4 +747,15 @@ keymaster_error_t TrustyKeymasterDevice::abort(const keymaster2_device_t* dev,
     return convert_device(dev)->abort(operation_handle);
 }
 
+/* static */
+keymaster_error_t TrustyKeymasterDevice::delete_key(const keymaster2_device_t* dev,
+                                               const keymaster_key_blob_t* key) {
+   return convert_device(dev)->delete_key(key);
+}
+
+/* static */
+keymaster_error_t TrustyKeymasterDevice::delete_all_keys(const keymaster2_device_t* dev) {
+   return convert_device(dev)->delete_all_keys();
+}
+
 }  // namespace keymaster