match-cli

match-cli

An open-source Command Line Interface (CLI) utility written in Golang to allow any partner of an Optable Data Connectivity Node (DCN) user to perform secure matches with the DCN.

The match-cli tool enables anyone without access to an Optable DCN (external partners) to create and run a secure private set intersection (PSI) match with an Optable DCN customer using the open-source match library. Both parties will run the DHPSI protocol by default to ensure that non-overlapping data is protected during the match.

Build

You can build the latest match-cli binary by running the following comamnd:

# clone the repo and go to the directory
git clone https://github.com/Optable/match-cli.git && cd match-cli

# compile:
make

# or more specifically:
make build

The successfully compiled binary will be located in bin/match-cli.

Example

Preparing the Match File

The input file that you provide to the match-cli utility should contain a line-separated list of type-prefixed and matchable identifiers recognizable by the partner's Optable DCN. The current list of supported matchable ID types and their associated normalization requirements and prefixes is documented here and here.

Performing the Secure Match

To perform a secure PSI match with a DCN, you must first obtain an <invite-code> from the DCN's operator. The <partner-name> below is used to identify the DCN you are connecting with for subsequent match operations.

$ bin/match-cli partner connect <partner-name> "<invite-code>"

After successful partnering, a match can be created. You can use <match-name> to identify and manage matches. A match_uuid will be displayed in a JSON-formatted output once the match is succefully created.

$ bin/match-cli match create <partner-name> <match-name>
$ {"match_uuid":"UUID"}

Note that you are not required to save the <match_uuid>, you can run the following command to retrieve it later:

$ bin/match-cli match list <partner-name>
$ {"match_uuid":"UUID","name":"<match-name>"}

You can then run a match with an input file that contains matchable identifiers as follows:

$ bin/match-cli match run <partner-name> <match_uuid> <path-to-file>

Upon successful execution of the match, the number of the matching identifiers will be returned by the remote DCN in a JSON-formatted string.

{"time":"YYYY-MM-DDTHH:MM:SS.000000Z","id":"UUID","state":"completed","results":{"emails":<intersection-size>}}

Commands

The match-cli utility provides two subcommands. The partner subcommand connects to a DCN to match with and identifies the sender (match-cli operator) as an external partner. The match subcommand creates a match attempt and performs the secure intersection protocol. For each subcommand, use the --help flag to see detailed help messages and available options. match run subcommand has useful flags that can configure the connection timeout and the PSI match timeout, as well as select a preferred PSI protocol.

Note that it's not currently possible to be a secure match receiver using the match-cli utility. To receive secure matches you currently must have access to an Optable DCN.

Additional documentation is available here.

Local Configuration

The match-cli utility stores information about connected DCNs to $HOME/.config/optable. This directory is created with the proper file permissions to prevent snooping since it will contain private keys associated with each of the partners that you successfully connect to using match-cli.