command: docker trust sign
short: Sign an image
long: '`docker trust sign` adds signatures to tags to create signed repositories.'
usage: docker trust sign IMAGE:TAG
pname: docker trust
plink: docker_trust.yaml
options:
- option: local
  value_type: bool
  default_value: "false"
  description: Sign a locally tagged image
  deprecated: false
  experimental: false
  experimentalcli: false
  kubernetes: false
  swarm: false
examples: |-
  ### Sign a tag as a repo admin

  Given an image:

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

  SIGNED TAG          DIGEST                                                             SIGNERS
  v1                  c24134c079c35e698060beabe110bb83ab285d0d978de7d92fed2c8c83570a41   (Repo Admin)

  Administrative keys for example/trust-demo:
  Repository Key: 36d4c3601102fa7c5712a343c03b94469e5835fb27c191b529c06fd19c14a942
  Root Key:       246d360f7c53a9021ee7d4259e3c5692f3f1f7ad4737b1ea8c7b8da741ad980b
  ```

  Sign a new tag with `docker trust sign`:

  ```bash
  $ docker trust sign example/trust-demo:v2

  Signing and pushing trust metadata for example/trust-demo:v2
  The push refers to a repository [docker.io/example/trust-demo]
  eed4e566104a: Layer already exists
  77edfb6d1e3c: Layer already exists
  c69f806905c2: Layer already exists
  582f327616f1: Layer already exists
  a3fbb648f0bd: Layer already exists
  5eac2de68a97: Layer already exists
  8d4d1ab5ff74: Layer already exists
  v2: digest: sha256:8f6f460abf0436922df7eb06d28b3cdf733d2cac1a185456c26debbff0839c56 size: 1787
  Signing and pushing trust metadata
  Enter passphrase for repository key with ID 36d4c36:
  Successfully signed docker.io/example/trust-demo:v2
  ```

  Use `docker trust inspect --pretty` to list the new signature:

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

  SIGNED TAG          DIGEST                                                             SIGNERS
  v1                  c24134c079c35e698060beabe110bb83ab285d0d978de7d92fed2c8c83570a41   (Repo Admin)
  v2                  8f6f460abf0436922df7eb06d28b3cdf733d2cac1a185456c26debbff0839c56   (Repo Admin)

  Administrative keys for example/trust-demo:
  Repository Key: 36d4c3601102fa7c5712a343c03b94469e5835fb27c191b529c06fd19c14a942
  Root Key:       246d360f7c53a9021ee7d4259e3c5692f3f1f7ad4737b1ea8c7b8da741ad980b
  ```

  ### Sign a tag as a signer

  Given an image:

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

  No signatures for example/trust-demo


  List of signers and their keys for example/trust-demo:

  SIGNER              KEYS
  alice               05e87edcaecb
  bob                 5600f5ab76a2

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

  Sign a new tag with `docker trust sign`:

  ```bash
  $ docker trust sign example/trust-demo:v1

  Signing and pushing trust metadata for example/trust-demo:v1
  The push refers to a repository [docker.io/example/trust-demo]
  26b126eb8632: Layer already exists
  220d34b5f6c9: Layer already exists
  8a5132998025: Layer already exists
  aca233ed29c3: Layer already exists
  e5d2f035d7a4: Layer already exists
  v1: digest: sha256:74d4bfa917d55d53c7df3d2ab20a8d926874d61c3da5ef6de15dd2654fc467c4 size: 1357
  Signing and pushing trust metadata
  Enter passphrase for delegation key with ID 27d42a8:
  Successfully signed docker.io/example/trust-demo:v1
  ```

  `docker trust inspect --pretty` lists the new signature:

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

  SIGNED TAG          DIGEST                                                             SIGNERS
  v1                  74d4bfa917d55d53c7df3d2ab20a8d926874d61c3da5ef6de15dd2654fc467c4   alice

  List of signers and their keys for example/trust-demo:

  SIGNER              KEYS
  alice               05e87edcaecb
  bob                 5600f5ab76a2

  Administrative keys for example/trust-demo:
  Repository Key: ecc457614c9fc399da523a5f4e24fe306a0a6ee1cc79a10e4555b3c6ab02f71e
  Root Key:       3cb2228f6561e58f46dbc4cda4fcaff9d5ef22e865a94636f82450d1d2234949
  ```
deprecated: false
experimental: false
experimentalcli: false
kubernetes: false
swarm: false

