RATSD

A RATS conceptual message collection daemon

Building

The binary ratsd is built by using make using the following steps:

• Install golang version specified in go.mod
• Ensure GOPATH is available in the shell path (export GOPATH="$HOME/go"; export PATH=$PATH:$GOPATH/bin)
• Install build tools using make install-tools.
• Build RATSd using make

(Optional) Regenerate ratsd core code from OpenAPI spec

Regeneration of the code for ratsd requires the installation of various protobuf packages beforehand. Use the following commands to install them:

make install-tools

Then generate the code with make generate

Building ratsd core and leaf attesters

Use the 'make build' command to build both the ratsd core and the leaf attesters. To build only the ratsd core, run make build-la. Run make build-sa to build only the leaf attesters.

$ make build
go build -o ratsd -buildmode=pie ./cmd
make -C attesters/
make[1]: Entering directory '/builddir/build/BUILD/ratsd-1.0.3+la3/attesters'
make -C tsm
make[2]: Entering directory '/builddir/build/BUILD/ratsd-1.0.3+la3/attesters/tsm'
make -C plugin
make[3]: Entering directory '/builddir/build/BUILD/ratsd-1.0.3+la3/attesters/tsm/plugin'
CGO_ENABLED=1 go build  -o ../../bin/tsm.plugin
make[3]: Leaving directory '/builddir/build/BUILD/ratsd-1.0.3+la3/attesters/tsm/plugin'
make[2]: Leaving directory '/builddir/build/BUILD/ratsd-1.0.3+la3/attesters/tsm'
make -C mocktsm
make[2]: Entering directory '/builddir/build/BUILD/ratsd-1.0.3+la3/attesters/mocktsm'
make -C plugin
make[3]: Entering directory '/builddir/build/BUILD/ratsd-1.0.3+la3/attesters/mocktsm/plugin'
CGO_ENABLED=1 go build  -o ../../bin/mocktsm.plugin
make[3]: Leaving directory '/builddir/build/BUILD/ratsd-1.0.3+la3/attesters/mocktsm/plugin'
make[2]: Leaving directory '/builddir/build/BUILD/ratsd-1.0.3+la3/attesters/mocktsm'
make[1]: Leaving directory '/builddir/build/BUILD/ratsd-1.0.3+la3/attesters'

Query ratsd

By default, ratsd core listens on port 8895. Use POST /ratsd/chares to retrieve a CMW collection containing evidence from each sub-attester. This API call requires the request body to be the JSON object {"nonce": $(Base64 string of 64-byte data)} replacing the placeholder with a proper base64 string. See the following example:

$ curl -X POST http://localhost:8895/ratsd/chares -H "Content-type: application/vnd.veraison.chares+json" -d '{"nonce": "TUlEQk5IMjhpaW9pc2pQeXh4eHh4eHh4eHh4eHh4eHhNSURCTkgyOGlpb2lzalB5eHh4eHh4eHh4eHh4eHh4eA"}' 
{"cmw":"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","eat_nonce":"TUlEQk5IMjhpaW9pc2pQeXh4eHh4eHh4eHh4eHh4eHhNSURCTkgyOGlpb2lzalB5eHh4eHh4eHh4eHh4eHh4eA","eat_profile":"tag:github.com,2024:veraison/ratsd"}

Get available attesters

Use endpoint GET /ratsd/subattesters to query all available leaf attesters and their available options. The usage can be found in the following

$ curl http://localhost:8895/ratsd/subattesters
[{"name":"mock-tsm","options":[{"data-type":"string","name":"privilege_level"}]},{"name":"tsm-report","options":[{"data-type":"string","name":"privilege_level"}]}]

Complex queries

Ratsd currently supports the Trusted Secure Module tsm attester. You can specify the privilege_level for configfs-TSM in the query.

curl -X POST http://localhost:8895/ratsd/chares -H "Content-type: application/vnd.veraison.chares+json" -d '{"nonce": "TUlEQk5IMjhpaW9pc2pQeXh4eHh4eHh4eHh4eHh4eHhNSURCTkgyOGlpb2lzalB5eHh4eHh4eHh4eHh4eHh4eA", tsm-report:{"privilege_level": "$level"}}' # Replace $level with a number from 0 to 3

Get evidence from the selected attester only

If more than one leaf attesters present, ratsd adds the evidence generated by all attesters to the response of /ratsd/chares. To limit the output to the selected attester, add list-options: selected to config.yaml, then specify the name of each attester along with the associated options in attester-selection. If the user does not wish to specify the attester-specific option, "$attester_name": "null" should be specified. The following is an example of the request:

"nonce": "base64urlencoded",

"attester-selection": {
  "attester-id-1": {
    "param11name": "param11value",
    "param12name": "param12value"
  },
  "attester-id-2": {
    "param21name": "param21value"
  },
  "attester-id-3": null
}

If list-options is not set, or if it's set to all in config.yaml, ratsd populates the EAT with CMW from all available attesters as the default behavior.

Content type selection

Pick the desired output content type of each sub-attester by specifying field "content-type" in "attester-selection" as shown in the following example:

"attester-selection": {
    "mock-tsm":{
        "content-type": "application/vnd.veraison.configfs-tsm+json",
        "privilege_level": "3"
    }
}