Revert "Revert "Weaver HAL""

This reverts commit 66d499a26faa4603af9b8140cb1d620431b036a5.
Test: It builds

Change-Id: I204e46e7ab7c91454a4561ff44bf9920ca78d6a5

5 files changed, 420 insertions, 0 deletions

diff --git a/weaver/1.0/Android.bp b/weaver/1.0/Android.bp
new file mode 100644
index 0000000000..738da4f7b1
--- /dev/null
+++ b/weaver/1.0/Android.bp
@@ -0,0 +1,63 @@
+// This file is autogenerated by hidl-gen. Do not edit manually.
+
+filegroup {
+    name: "android.hardware.weaver@1.0_hal",
+    srcs: [
+        "types.hal",
+        "IWeaver.hal",
+    ],
+}
+
+genrule {
+    name: "android.hardware.weaver@1.0_genc++",
+    tools: ["hidl-gen"],
+    cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.weaver@1.0",
+    srcs: [
+        ":android.hardware.weaver@1.0_hal",
+    ],
+    out: [
+        "android/hardware/weaver/1.0/types.cpp",
+        "android/hardware/weaver/1.0/WeaverAll.cpp",
+    ],
+}
+
+genrule {
+    name: "android.hardware.weaver@1.0_genc++_headers",
+    tools: ["hidl-gen"],
+    cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces -randroid.hidl:system/libhidl/transport android.hardware.weaver@1.0",
+    srcs: [
+        ":android.hardware.weaver@1.0_hal",
+    ],
+    out: [
+        "android/hardware/weaver/1.0/types.h",
+        "android/hardware/weaver/1.0/hwtypes.h",
+        "android/hardware/weaver/1.0/IWeaver.h",
+        "android/hardware/weaver/1.0/IHwWeaver.h",
+        "android/hardware/weaver/1.0/BnHwWeaver.h",
+        "android/hardware/weaver/1.0/BpHwWeaver.h",
+        "android/hardware/weaver/1.0/BsWeaver.h",
+    ],
+}
+
+cc_library_shared {
+    name: "android.hardware.weaver@1.0",
+    generated_sources: ["android.hardware.weaver@1.0_genc++"],
+    generated_headers: ["android.hardware.weaver@1.0_genc++_headers"],
+    export_generated_headers: ["android.hardware.weaver@1.0_genc++_headers"],
+    shared_libs: [
+        "libhidlbase",
+        "libhidltransport",
+        "libhwbinder",
+        "liblog",
+        "libutils",
+        "libcutils",
+        "android.hidl.base@1.0",
+    ],
+    export_shared_lib_headers: [
+        "libhidlbase",
+        "libhidltransport",
+        "libhwbinder",
+        "libutils",
+        "android.hidl.base@1.0",
+    ],
+}
diff --git a/weaver/1.0/Android.mk b/weaver/1.0/Android.mk
new file mode 100644
index 0000000000..f8b08ac7c0
--- /dev/null
+++ b/weaver/1.0/Android.mk
@@ -0,0 +1,232 @@
+# This file is autogenerated by hidl-gen. Do not edit manually.
+
+LOCAL_PATH := $(call my-dir)
+
+################################################################################
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := android.hardware.weaver@1.0-java
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+
+intermediates := $(call local-generated-sources-dir, COMMON)
+
+HIDL := $(HOST_OUT_EXECUTABLES)/hidl-gen$(HOST_EXECUTABLE_SUFFIX)
+
+LOCAL_JAVA_LIBRARIES := \
+    android.hidl.base@1.0-java \
+
+
+#
+# Build types.hal (WeaverConfig)
+#
+GEN := $(intermediates)/android/hardware/weaver/V1_0/WeaverConfig.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.weaver@1.0::types.WeaverConfig
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (WeaverReadResponse)
+#
+GEN := $(intermediates)/android/hardware/weaver/V1_0/WeaverReadResponse.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.weaver@1.0::types.WeaverReadResponse
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (WeaverReadStatus)
+#
+GEN := $(intermediates)/android/hardware/weaver/V1_0/WeaverReadStatus.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.weaver@1.0::types.WeaverReadStatus
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (WeaverStatus)
+#
+GEN := $(intermediates)/android/hardware/weaver/V1_0/WeaverStatus.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.weaver@1.0::types.WeaverStatus
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build IWeaver.hal
+#
+GEN := $(intermediates)/android/hardware/weaver/V1_0/IWeaver.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/IWeaver.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
+$(GEN): $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.weaver@1.0::IWeaver
+
+$(GEN): $(LOCAL_PATH)/IWeaver.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+include $(BUILD_JAVA_LIBRARY)
+
+
+################################################################################
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := android.hardware.weaver@1.0-java-static
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+
+intermediates := $(call local-generated-sources-dir, COMMON)
+
+HIDL := $(HOST_OUT_EXECUTABLES)/hidl-gen$(HOST_EXECUTABLE_SUFFIX)
+
+LOCAL_STATIC_JAVA_LIBRARIES := \
+    android.hidl.base@1.0-java-static \
+
+
+#
+# Build types.hal (WeaverConfig)
+#
+GEN := $(intermediates)/android/hardware/weaver/V1_0/WeaverConfig.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.weaver@1.0::types.WeaverConfig
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (WeaverReadResponse)
+#
+GEN := $(intermediates)/android/hardware/weaver/V1_0/WeaverReadResponse.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.weaver@1.0::types.WeaverReadResponse
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (WeaverReadStatus)
+#
+GEN := $(intermediates)/android/hardware/weaver/V1_0/WeaverReadStatus.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.weaver@1.0::types.WeaverReadStatus
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (WeaverStatus)
+#
+GEN := $(intermediates)/android/hardware/weaver/V1_0/WeaverStatus.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.weaver@1.0::types.WeaverStatus
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build IWeaver.hal
+#
+GEN := $(intermediates)/android/hardware/weaver/V1_0/IWeaver.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/IWeaver.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
+$(GEN): $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.weaver@1.0::IWeaver
+
+$(GEN): $(LOCAL_PATH)/IWeaver.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+
+
+include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/weaver/1.0/IWeaver.hal b/weaver/1.0/IWeaver.hal
new file mode 100644
index 0000000000..2362c29508
--- /dev/null
+++ b/weaver/1.0/IWeaver.hal
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+package android.hardware.weaver@1.0;
+
+/**
+ * Weaver provides secure storage of secret values that can only be read if the
+ * corresponding key has been presented.
+ *
+ * The storage must be secure as the device's user authentication and encryption
+ * relies on the security of these values. The cardinality of the domains of the
+ * key and value must be suitably large such that they cannot be easily guessed.
+ *
+ * Weaver is structured as an array of slots, each containing a key-value pair.
+ * Slots are uniquely identified by an ID in the range [0, `getConfig().slots`).
+ */
+interface IWeaver {
+    /**
+     * Retrieves the config information for this implementation of Weaver.
+     *
+     * The config is static i.e. every invocation returns the same information.
+     *
+     * @return status is OK if the config was successfuly obtained.
+     * @return config data for this implementation of Weaver if status is OK,
+     *         otherwise undefined.
+     */
+    getConfig() generates (WeaverStatus status, WeaverConfig config);
+
+    /**
+     * Overwrites the identified slot with the provided key and value.
+     *
+     * The new values are written regardless of the current state of the slot in
+     * order to remain idempotent.
+     *
+     * @param slotId of the slot to write to.
+     * @param key to write to the slot.
+     * @param value to write to slot.
+     * @return status is OK if the write was successfully completed.
+     */
+    write(uint32_t slotId, vec<uint8_t> key, vec<uint8_t> value)
+                generates (WeaverStatus status);
+
+    /**
+     * Attempts to retrieve the value stored in the identified slot.
+     *
+     * The value is only returned if the provided key matches the key stored in
+     * the slot. The value is never returned if the wrong key is provided.
+     *
+     * Throttling is used to limit the frequency of failed read attempts. The
+     * value is only returned when throttling is not active, even if the correct
+     * key is provided. If called when throttling is active, the time until the
+     * next attempt can be made is returned.
+     *
+     * @param slotId of the slot to read from.
+     * @param key that is stored in the slot.
+     * @return status is OK if the value was successfully read, INCORRECT_KEY if
+     *         the key does not match the key in the slot or THROTTLE if
+     *         throttling is active.
+     * @return readResponse contains the value read and the timeout to wait
+     *         before making the next request. The value is undefined if the
+     *         status is not OK and the timeout is undefined if the status is
+     *         FAILED.
+     */
+    read(uint32_t slotId, vec<uint8_t> key)
+                generates (WeaverReadStatus status,
+                           WeaverReadResponse readResponse);
+};
diff --git a/weaver/1.0/types.hal b/weaver/1.0/types.hal
new file mode 100644
index 0000000000..49e5c04d47
--- /dev/null
+++ b/weaver/1.0/types.hal
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+package android.hardware.weaver@1.0;
+
+enum WeaverStatus : uint32_t {
+    OK,
+    FAILED,
+};
+
+struct WeaverConfig {
+    /** The number of slots available. */
+    uint32_t slots;
+    /** The number of bytes used for a key. */
+    uint32_t keySize;
+    /** The number of bytes used for a value. */
+    uint32_t valueSize;
+};
+
+enum WeaverReadStatus : WeaverStatus {
+    INCORRECT_KEY,
+    THROTTLE,
+};
+
+struct WeaverReadResponse {
+    /** The time to wait, in milliseconds, before making the next request. */
+    uint32_t timeout;
+    /** The value read from the slot or empty if the value was not read. */
+    vec<uint8_t> value;
+};
diff --git a/weaver/Android.bp b/weaver/Android.bp
new file mode 100644
index 0000000000..bbb3e4bac0
--- /dev/null
+++ b/weaver/Android.bp
@@ -0,0 +1,4 @@
+// This is an autogenerated file, do not edit.
+subdirs = [
+    "1.0",
+]