DockerCLI/docs/reference/commandline/trust_signer_add.md

trust signer add

Add a signer

Options

Name	Type	Default	Description
--key	list		Path to the signer's public key file

Description

docker trust signer add adds signers to signed repositories.

Examples

Add a signer to a repo

To add a new signer, alice, to this repository:

$ docker trust inspect --pretty example/trust-demo

No signatures for example/trust-demo


List of signers and their keys:

SIGNER              KEYS
bob                 5600f5ab76a2

Administrative keys for example/trust-demo:
Repository Key: 642692c14c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4555b3c6ab02f71e
Root Key:       3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949

Add alice with docker trust signer add:

$ docker trust signer add alice example/trust-demo --key alice.crt
  Adding signer "alice" to example/trust-demo...
  Enter passphrase for repository key with ID 642692c:
Successfully added signer: alice to example/trust-demo

docker trust inspect --pretty now lists alice as a valid signer:

$ docker trust inspect --pretty example/trust-demo

No signatures for example/trust-demo


List of signers and their keys:

SIGNER              KEYS
alice               05e87edcaecb
bob                 5600f5ab76a2

Administrative keys for example/trust-demo:
Repository Key: 642692c14c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4555b3c6ab02f71e
Root Key:       3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949

Initialize a new repo and add a signer

When adding a signer on a repo for the first time, docker trust signer add sets up a new repo if it doesn't exist.

$ docker trust inspect --pretty example/trust-demo

no signatures or cannot access example/trust-demo

$ docker trust signer add alice example/trust-demo --key alice.crt

Initializing signed repository for example/trust-demo...
Enter passphrase for root key with ID 748121c:
Enter passphrase for new repository key with ID 95b9e55:
Repeat passphrase for new repository key with ID 95b9e55:
Successfully initialized "example/trust-demo"

Adding signer "alice" to example/trust-demo...
Successfully added signer: alice to example/trust-demo

$ docker trust inspect --pretty example/trust-demo

No signatures for example/trust-demo


SIGNED TAG          DIGEST                                                             SIGNERS

List of signers and their keys:

SIGNER              KEYS
alice               6d52b29d940f

Administrative keys for example/trust-demo:
Repository Key: 95b9e5565eac3ef5ec01406801bdfb70feb40c17808d2222427c18046eb63beb
Root Key:       748121c14bd1461f6c58cb3ef39087c8fdc7633bb11a98af844fd9a04e208103

Add a signer to multiple repos

To add a signer, alice, to multiple repositories:

$ docker trust inspect --pretty example/trust-demo

SIGNED TAG          DIGEST                                                             SIGNERS
v1                  74d4bfa917d55d53c7df3d2ab20a8d926874d61c3da5ef6de15dd2654fc467c4   bob

List of signers and their keys:

SIGNER              KEYS
bob                 5600f5ab76a2

Administrative keys for example/trust-demo:
Repository Key: ecc457614c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4555b3c6ab02f71e
Root Key:       3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949

$ docker trust inspect --pretty example/trust-demo2

SIGNED TAG          DIGEST                                                             SIGNERS
v1                  74d4bfa917d55d53c7df3d2ab20a8d926874d61c3da5ef6de15dd2654fc467c4   bob

List of signers and their keys:

SIGNER              KEYS
bob                 5600f5ab76a2

Administrative keys for example/trust-demo2:
Repository Key: ece554f14c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4553d2ab20a8d9268
Root Key:       3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949

Add alice to both repositories with a single docker trust signer add command:

$ docker trust signer add alice example/trust-demo example/trust-demo2 --key alice.crt

Adding signer "alice" to example/trust-demo...
Enter passphrase for repository key with ID 95b9e55:
Successfully added signer: alice to example/trust-demo

Adding signer "alice" to example/trust-demo2...
Enter passphrase for repository key with ID ece554f:
Successfully added signer: alice to example/trust-demo2

docker trust inspect --pretty now lists alice as a valid signer of both example/trust-demo and example/trust-demo2:

$ docker trust inspect --pretty example/trust-demo

SIGNED TAG          DIGEST                                                             SIGNERS
v1                  74d4bfa917d55d53c7df3d2ab20a8d926874d61c3da5ef6de15dd2654fc467c4   bob

List of signers and their keys:

SIGNER              KEYS
alice               05e87edcaecb
bob                 5600f5ab76a2

Administrative keys for example/trust-demo:
Repository Key: 95b9e5514c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4555b3c6ab02f71e
Root Key:       3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949

$ docker trust inspect --pretty example/trust-demo2

SIGNED TAG          DIGEST                                                             SIGNERS
v1                  74d4bfa917d55d53c7df3d2ab20a8d926874d61c3da5ef6de15dd2654fc467c4   bob

List of signers and their keys:

SIGNER              KEYS
alice               05e87edcaecb
bob                 5600f5ab76a2

Administrative keys for example/trust-demo2:
Repository Key: ece554f14c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4553d2ab20a8d9268
Root Key:       3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949

docker trust signer add adds signers to repositories on a best effort basis, so it will continue to add the signer to subsequent repositories if one attempt fails:

$ docker trust signer add alice example/unauthorized example/authorized --key alice.crt

Adding signer "alice" to example/unauthorized...
you are not authorized to perform this operation: server returned 401.

Adding signer "alice" to example/authorized...
Enter passphrase for repository key with ID c6772a0:
Successfully added signer: alice to example/authorized

failed to add signer to: example/unauthorized