Refactor keystore.
This CL isn't nearly as big as it looks. It doesn't change keystore
functionality, it just moves all of the classes out of the former
keystore.cpp into their own .h and .cpp files.
Change-Id: I29a1ce21bff574be56128b32fc417e5a3d3c55fb
diff --git a/keystore/entropy.cpp b/keystore/entropy.cpp
new file mode 100644
index 0000000..1bfe9a1
--- /dev/null
+++ b/keystore/entropy.cpp
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#define LOG_TAG "keystore"
+
+#include "entropy.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <cutils/log.h>
+
+#include "keystore_utils.h"
+
+Entropy::~Entropy() {
+ if (mRandom >= 0) {
+ close(mRandom);
+ }
+}
+
+bool Entropy::open() {
+ const char* randomDevice = "/dev/urandom";
+ mRandom = TEMP_FAILURE_RETRY(::open(randomDevice, O_RDONLY));
+ if (mRandom < 0) {
+ ALOGE("open: %s: %s", randomDevice, strerror(errno));
+ return false;
+ }
+ return true;
+}
+
+bool Entropy::generate_random_data(uint8_t* data, size_t size) const {
+ return (readFully(mRandom, data, size) == size);
+}