diff --git a/Keymaster.cpp b/Keymaster.cpp
index abee9b2..c3f2912 100644
--- a/Keymaster.cpp
+++ b/Keymaster.cpp
@@ -138,6 +138,27 @@
     return true;
 }
 
+bool Keymaster::exportKey(const KeyBuffer& kmKey, std::string* key) {
+    auto kmKeyBlob = km::support::blob2hidlVec(std::string(kmKey.data(), kmKey.size()));
+    km::ErrorCode km_error;
+    auto hidlCb = [&](km::ErrorCode ret, const hidl_vec<uint8_t>& exportedKeyBlob) {
+        km_error = ret;
+        if (km_error != km::ErrorCode::OK) return;
+        if (key)
+            key->assign(reinterpret_cast<const char*>(&exportedKeyBlob[0]), exportedKeyBlob.size());
+    };
+    auto error = mDevice->exportKey(km::KeyFormat::RAW, kmKeyBlob, {}, {}, hidlCb);
+    if (!error.isOk()) {
+        LOG(ERROR) << "export_key failed: " << error.description();
+        return false;
+    }
+    if (km_error != km::ErrorCode::OK) {
+        LOG(ERROR) << "export_key failed, code " << int32_t(km_error);
+        return false;
+    }
+    return true;
+}
+
 bool Keymaster::deleteKey(const std::string& key) {
     auto keyBlob = km::support::blob2hidlVec(key);
     auto error = mDevice->deleteKey(keyBlob);