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trusty: keymaster: Implement export_key 

Test: builds
Change-Id: I47d1ed4144014fca47fdf67f9f4d2eb0d9b1eb8f
This commit is contained in:
Jocelyn Bohr 2017-02-09 17:29:59 -08:00
parent 2d768669fa
commit 4cbfa7f2f0
1 changed files with 31 additions and 0 deletions
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31
trusty/keymaster/trusty_keymaster_device.cpp
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@ -323,6 +323,37 @@ keymaster_error_t TrustyKeymasterDevice::export_key(keymaster_key_format_t expor
const keymaster_blob_t* app_data,
keymaster_blob_t* export_data) {
ALOGD("Device received export_key");
if (error_ != KM_ERROR_OK) {
return error_;
}
if (!key_to_export || !key_to_export->key_material) {
return KM_ERROR_UNEXPECTED_NULL_POINTER;
}
if (!export_data) {
return KM_ERROR_OUTPUT_PARAMETER_NULL;
}
export_data->data = nullptr;
export_data->data_length = 0;
ExportKeyRequest request(message_version_);
request.key_format = export_format;
request.SetKeyMaterial(*key_to_export);
AddClientAndAppData(client_id, app_data, &request);
ExportKeyResponse response(message_version_);
keymaster_error_t err = Send(KM_EXPORT_KEY, request, &response);
if (err != KM_ERROR_OK) {
return err;
}
export_data->data_length = response.key_data_length;
export_data->data = DuplicateBuffer(response.key_data, response.key_data_length);
if (!export_data->data) {
return KM_ERROR_MEMORY_ALLOCATION_FAILED;
}
return KM_ERROR_OK;
}