docker-tor-hidden-service

Setup

Setup hosts

From 2019, new conf to handle tor v3 address has been added. Here an example with docker-compose v2+:

version: "2"

services:
  tor:
    image: goldy/tor-hidden-service:0.3.5.8
    links:
      - hello
      - world
      - again
    environment:
        # Set mapping ports
        HELLO_TOR_SERVICE_HOSTS: 80:hello:80,800:hello:80,8888:hello:80
        # Set private key
        HELLO_TOR_SERVICE_KEY: |
            -----BEGIN RSA PRIVATE KEY-----
            MIICXQIBAAKBgQDR8TdQF9fDlGhy1SMgfhMBi9TaFeD12/FK27TZE/tYGhxXvs1C
            NmFJy1hjVxspF5unmUsCk0yEsvEdcAdp17Vynz6W41VdinETU9yXHlUJ6NyI32AH
            dnFnHEcsllSEqD1hPAAvMUWwSMJaNmBEFtl8DUMS9tPX5fWGX4w5Xx8dZwIDAQAB
            AoGBAMb20jMHxaZHWg2qTRYYJa8LdHgS0BZxkWYefnBUbZn7dOz7mM+tddpX6raK
            8OSqyQu3Tc1tB9GjPLtnVr9KfVwhUVM7YXC/wOZo+u72bv9+4OMrEK/R8xy30XWj
            GePXEu95yArE4NucYphxBLWMMu2E4RodjyJpczsl0Lohcn4BAkEA+XPaEKnNA3AL
            1DXRpSpaa0ukGUY/zM7HNUFMW3UP00nxNCpWLSBmrQ56Suy7iSy91oa6HWkDD/4C
            k0HslnMW5wJBANdz4ehByMJZmJu/b5y8wnFSqep2jmJ1InMvd18BfVoBTQJwGMAr
            +qwSwNXXK2YYl9VJmCPCfgN0o7h1AEzvdYECQAM5UxUqDKNBvHVmqKn4zShb1ugY
            t1RfS8XNbT41WhoB96MT9P8qTwlniX8UZiwUrvNp1Ffy9n4raz8Z+APNwvsCQQC9
            AuaOsReEmMFu8VTjNh2G+TQjgvqKmaQtVNjuOgpUKYv7tYehH3P7/T+62dcy7CRX
            cwbLaFbQhUUUD2DCHdkBAkB6CbB+qhu67oE4nnBCXllI9EXktXgFyXv/cScNvM9Y
            FDzzNAAfVc5Nmbmx28Nw+0w6pnpe/3m0Tudbq3nHdHfQ
            -----END RSA PRIVATE KEY-----            

        # hello and again will share the same onion v3 address
        FOO_TOR_SERVICE_HOSTS: 88:again:80,8000:world:80
        FOO_TOR_SERVICE_VERSION: '3'
        # tor v3 address private key base 64 encoded
        FOO_TOR_SERVICE_KEY: |
            PT0gZWQyNTUxOXYxLXNlY3JldDogdHlwZTAgPT0AAACArobDQYyZAWXei4QZwr++
            j96H1X/gq14NwLRZ2O5DXuL0EzYKkdhZSILY85q+kfwZH8z4ceqe7u1F+0pQi/sM            

  hello:
    image: tutum/hello-world
    hostname: hello

  world:
    image: tutum/hello-world
    hostname: world

  again:
    image: tutum/hello-world
    hostname: again

This configuration will output:

foo: xwjtp3mj427zdp4tljiiivg2l5ijfvmt5lcsfaygtpp6cw254kykvpyd.onion:88, xwjtp3mj427zdp4tljiiivg2l5ijfvmt5lcsfaygtpp6cw254kykvpyd.onion:8000
hello: 5azvyr7dvvr4cldn.onion:80, 5azvyr7dvvr4cldn.onion:800, 5azvyr7dvvr4cldn.onion:8888

Environment variables

{SERVICE}_TOR_SERVICE_HOSTS

The config patern for this variable is: {exposed_port}:{hostname}:{port}}

For example 80:hello:8080 will expose an onion service on port 80 to the port 8080 of hello hostname.

Unix sockets are supported too, 80:unix://path/to/socket.sock will expose an onion service on port 80 to the socket /path/to/socket.sock. See docker-compose.v2.socket.yml for an example.

You can concatenate services using comas.

Warning

: Using sockets and ports in the same service group can lead to issues

{SERVICE}_TOR_SERVICE_VERSION

Can be 2 or 3. Set the tor address type.

2 gives short addresses 5azvyr7dvvr4cldn.onion and 3 long addresses xwjtp3mj427zdp4tljiiivg2l5ijfvmt5lcsfaygtpp6cw254kykvpyd.onion

{SERVICE}_TOR_SERVICE_KEY

You can set the private key for the current service.

Tor v2 addresses uses RSA PEM keys like:

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

Tor v3 addresses uses ed25519 binary keys. It should be base64 encoded:

PT0gZWQyNTUxOXYxLXNlY3JldDogdHlwZTAgPT0AAACArobDQYyZAWXei4QZwr++j96H1X/gq14NwLRZ2O5DXuL0EzYKkdhZSILY85q+kfwZH8z4ceqe7u1F+0pQi/sM

Secrets

Secret key can be set through docker secrets, see docker-compose.v3.yml for example.

Tools

A command line tool onions is available in container to get .onion url when container is running.

# Get services
$ docker exec -ti torhiddenproxy_tor_1 onions
hello: vegm3d7q64gutl75.onion:80
world: b2sflntvdne63amj.onion:80

# Get json
$ docker exec -ti torhiddenproxy_tor_1 onions --json
{"hello": ["b2sflntvdne63amj.onion:80"], "world": ["vegm3d7q64gutl75.onion:80"]}

Auto reload

Changing /etc/tor/torrc file triggers a SIGHUP signal to tor to reload configuration.

To disable this behavior, add ENTRYPOINT_DISABLE_RELOAD in environment.

Versions

Container version will follow tor release versions.

pyentrypoint

This container uses pyentrypoint to generate its setup.

If you need to use the legacy version, please checkout the legacy branch or pull goldy/tor-hidden-service:legacy.

pytor

This containner uses pytor to mannages tor cryptography, generate keys and compute onion urls.

Legacy deprecated doc

Warning

: ALL THE DOC BELLOW IS LEGACY, IT'S STILL WORKING BUT IT'S NOT RECOMMENDED ANYMORE AND COULD BE DROPPED IN FUTURE RELEASES.

Create a tor hidden service with a link

# run a container with a network application
$ docker run -d --name hello_world tutum/hello-world

# and just link it to this container
$ docker run -ti --link hello_world goldy/tor-hidden-service

The .onion URLs are displayed to stdout at startup.

To keep onion keys, just mount volume /var/lib/tor/hidden_service/

$ docker run -ti --link something --volume /path/to/keys:/var/lib/tor/hidden_service/ goldy/tor-hidden-service

Look at the docker-compose.yml file to see how to use it.

Set private key

Private key is settable by environment or by copying file in hostname/private_key in docket volume (hostname is the link name).

It's easier to pass key in environment with docker-compose.

    links:
      - hello
      - world
    environment:
        # Set private key
        HELLO_KEY: |
            -----BEGIN RSA PRIVATE KEY-----
            MIICXQIBAAKBgQDR8TdQF9fDlGhy1SMgfhMBi9TaFeD12/FK27TZE/tYGhxXvs1C
            NmFJy1hjVxspF5unmUsCk0yEsvEdcAdp17Vynz6W41VdinETU9yXHlUJ6NyI32AH
            dnFnHEcsllSEqD1hPAAvMUWwSMJaNmBEFtl8DUMS9tPX5fWGX4w5Xx8dZwIDAQAB
            AoGBAMb20jMHxaZHWg2qTRYYJa8LdHgS0BZxkWYefnBUbZn7dOz7mM+tddpX6raK
            8OSqyQu3Tc1tB9GjPLtnVr9KfVwhUVM7YXC/wOZo+u72bv9+4OMrEK/R8xy30XWj
            GePXEu95yArE4NucYphxBLWMMu2E4RodjyJpczsl0Lohcn4BAkEA+XPaEKnNA3AL
            1DXRpSpaa0ukGUY/zM7HNUFMW3UP00nxNCpWLSBmrQ56Suy7iSy91oa6HWkDD/4C
            k0HslnMW5wJBANdz4ehByMJZmJu/b5y8wnFSqep2jmJ1InMvd18BfVoBTQJwGMAr
            +qwSwNXXK2YYl9VJmCPCfgN0o7h1AEzvdYECQAM5UxUqDKNBvHVmqKn4zShb1ugY
            t1RfS8XNbT41WhoB96MT9P8qTwlniX8UZiwUrvNp1Ffy9n4raz8Z+APNwvsCQQC9
            AuaOsReEmMFu8VTjNh2G+TQjgvqKmaQtVNjuOgpUKYv7tYehH3P7/T+62dcy7CRX
            cwbLaFbQhUUUD2DCHdkBAkB6CbB+qhu67oE4nnBCXllI9EXktXgFyXv/cScNvM9Y
            FDzzNAAfVc5Nmbmx28Nw+0w6pnpe/3m0Tudbq3nHdHfQ
            -----END RSA PRIVATE KEY-----            

Options are set using the following pattern: LINKNAME_KEY

Setup port

Caution: Using PORT_MAP with multiple ports on single service will cause tor to fail.

Use link setting in environment with the following pattern: LINKNAME_PORTS.

Like docker, first port is exposed port and the second one is service internal port.

links:
  - hello
  - world
  - hey
environment:
    # Set mapping ports
    HELLO_PORTS: 80:80

    # Multiple ports can be coma separated
    WORLD_PORTS: 8000:80,8888:80,22:22

    # Socket mapping is supported
    HEY_PORTS: 80:unix:/var/run/socket.sock

DEPRECATED: By default, ports are the same as linked containers, but a default port can be mapped using PORT_MAP environment variable.

Socket

To increase security, it's possible to setup your service through socket between containers and turn off network in your app container. See docker-compose.v2.sock.yml for an example.

Warning: Due to a bug in tor configuration parser, it's not possible to mix network link and socket link in the same tor configuration.

Group services

Multiple services can be hosted behind the same onion address.

links:
  - hello
  - world
  - hey
environment:
    # Set mapping ports
    HELLO_PORTS: 80:80

    # Multiple ports can be coma separated
    WORLD_PORTS: 8000:80,8888:80,22:22

    # Socket mapping is supported
    HEY_PORTS: 80:unix:/var/run/socket.sock

    # hello and world will share the same onion address
    # Service name can be any string as long there is not special char
    HELLO_SERVICE_NAME: foo
    WORLD_SERVICE_NAME: foo

Warning: Be carefull to not use the same exposed ports for grouped services.

Compose v2 support

Links setting are required when using docker-compose v2. See docker-compose.v2.yml for example.

Copose v3 support and secrets

Links setting are required when using docker-compose v3. See docker-compose.v3.yml for example.