Merge "Do Keymaster HMAC key agreement in vold." into pi-dev
diff --git a/Android.bp b/Android.bp
index b18d7c4..a8934fc 100644
--- a/Android.bp
+++ b/Android.bp
@@ -163,6 +163,7 @@
     required: [
         "mke2fs",
         "vold_prepare_subdirs",
+        "wait_for_keymaster",
     ],
 }
 
@@ -184,6 +185,28 @@
 }
 
 cc_binary {
+    name: "wait_for_keymaster",
+    defaults: ["vold_default_flags"],
+
+    srcs: [
+        "wait_for_keymaster.cpp",
+        "Keymaster.cpp",
+    ],
+    shared_libs: [
+        "libbase",
+        "libbinder",
+
+        "android.hardware.keymaster@3.0",
+        "android.hardware.keymaster@4.0",
+        "libhardware",
+        "libhardware_legacy",
+        "libhidlbase",
+        "libhwbinder",
+        "libkeymaster4support",
+    ],
+}
+
+cc_binary {
     name: "secdiscard",
     defaults: ["vold_default_flags"],
 
diff --git a/MetadataCrypt.cpp b/MetadataCrypt.cpp
index 4a847e3..c14b9a2 100644
--- a/MetadataCrypt.cpp
+++ b/MetadataCrypt.cpp
@@ -79,9 +79,10 @@
     }
     std::string key_dir = data_rec->key_dir;
     auto dir = key_dir + "/key";
-    LOG(DEBUG) << "key_dir/key: " << key;
-    if (!fs_mkdirs(dir.c_str(), 0700)) {
+    LOG(DEBUG) << "key_dir/key: " << dir;
+    if (fs_mkdirs(dir.c_str(), 0700)) {
         PLOG(ERROR) << "Creating directories: " << dir;
+        return false;
     }
     auto temp = key_dir + "/tmp";
     if (!android::vold::retrieveKey(create_if_absent, dir, temp, key)) return false;
diff --git a/wait_for_keymaster.cpp b/wait_for_keymaster.cpp
new file mode 100644
index 0000000..bf26518
--- /dev/null
+++ b/wait_for_keymaster.cpp
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <android-base/logging.h>
+
+#include "Keymaster.h"
+
+int main(int argc, char** argv) {
+    setenv("ANDROID_LOG_TAGS", "*:v", 1);
+    if (getppid() == 1) {
+        // If init is calling us then it's during boot and we should log to kmsg
+        android::base::InitLogging(argv, &android::base::KernelLogger);
+    } else {
+        android::base::InitLogging(argv, &android::base::StderrLogger);
+    }
+    LOG(INFO) << "Waiting for Keymaster device";
+    android::vold::Keymaster keymaster;
+    LOG(INFO) << "Keymaster device ready";
+    return 0;
+}