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+# attest-tool
+
+`attest-tool` is a simple utility to exercise attestation-related operations on your system.
+
+## Building attest-tool
+
+If your system has git and a [Go 1.15+ compiler](https://golang.org/dl/) installed, you can
+install `attest-tool` from source by running the following commands:
+
+```shell
+git clone 'https://github.com/google/go-attestation' && cd go-attestation/attest/attest-tool
+go build -o attest-tool ./ # compiled to ./attest-tool
+```
+
+## Testing attestation readiness
+
+The main use-case of `attest-tool` is testing whether attestation works on the local system.
+
+Once `attest-tool` has been built, you can run it in self-test mode like this:
+
+```shell
+./attest-tool self-test
+```
+
+After a few seconds, it should print out a 'PASS' message, or a 'FAIL' message with a
+description of what went wrong.
+
+On Linux, `attest-tool` either needs to be run as root, or granted access to the TPM (`/dev/tpmrm0`) device
+& event log (`/sys/kernel/security/tpm0/binary_bios_measurements`)