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+# Google Chrome Content Analysis Connector Agent SDK
+
+The Google Chrome Content Analysis Connector provides an official mechanism
+allowing Data Loss Prevention (DLP) agents to more deeply integrate their
+services with Google Chrome.
+
+DLP agents are background processes on managed computers that allow enterprises
+to monitor locally running applications for data exfiltration events.  They can
+allow/block these activities based on customer defined DLP policies.
+
+This repository contains the SDK that DLP agents may use to become service
+providers for the Google Chrome Content Analysis Connector.  The code that must
+be compiled and linked into the content analysis agent is located in the `agent`
+subdirectory.
+
+A demo implementation of a service provider is located in the `demo` subdirectory.
+
+The code that must be compiled and linked into Google Chrome is located in
+the `browser` subdirectory.
+
+The Protocol Buffer serialization format is used to serialize messages between the
+browser and the agent. The protobuf definitions used can be found in the `proto`
+subdirectory.
+
+## Google Protocol Buffers
+
+This SDK depends on Google Protocol Buffers version 3.18 or later.  It may be
+installed from Google's [download page](https://developers.google.com/protocol-buffers/docs/downloads#release-packages)
+for your developement platform.  It may also be installed using a package
+manager.
+
+The included prepare_build scripts use the Microsoft [vcpkg](https://github.com/microsoft/vcpkg)
+package manager to install protobuf.  vcpkg is available on all supported
+platforms.
+
+## Build
+
+### Pre-requisites
+
+The following must be installed on the computer before building the demo:
+
+- [git](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git) version 2.33 or later.
+- [cmake](https://cmake.org/install/) version 3.23 or later.
+- A C++ compiler toolchain for your platform.
+- On linux, the `realpath` shell tool, available in the `coreutils` package.
+  In Debian-based distributions use `sudo apt intall coreutils`.
+  In Red Hat distributions use `sudo yum install coreutils`.
+- On Mac, use `brew install cmake coreutils pkg-config googletest` or an equivalent setup
+
+### Running prepare_build
+
+First get things ready by installing required dependencies:
+```
+$SDK_DIR/prepare_build <build-dir>
+```
+where `<build-dir>` is the path to a directory where the demo will be built.
+By default, if no argument is provided, a directory named `build` will be
+created in the project root. Any output within the `build/` directory will
+be ignored by version control.
+
+`prepare_build` performs the following steps:
+1. Downloads the vcpkg package manager.
+2. Downloads and builds the Google Protocol Buffers library.
+3. Creates build files for your specific platform.
+
+### Cmake Targets
+
+To build the demo run the command `cmake --build <build-dir>`.
+
+To build the protocol buffer targets run the command `cmake --build <build-dir> --target proto`