NAME

       podman-image-trust - Manage container registry image trust policy

SYNOPSIS

       podman image trust set|show [options] registry[/repository]

DESCRIPTION

       Manages  which registries to trust as a source of container images  based on its location.
       (This option is not available with the remote Podman client,  including  Mac  and  Windows
       (excluding WSL2) machines)

       The  location  is  determined  by the transport and the registry host of the image.  Using
       this container image docker://docker.io/library/busybox  as  an  example,  docker  is  the
       transport and docker.io is the registry host.

       Trust  is  defined  in /etc/containers/policy.json and is enforced when a user attempts to
       pull a remote image from a registry.  The trust policy in policy.json describes a registry
       scope  (registry  and/or  repository)  for  the trust.  This trust can use public keys for
       signed images.

       The scope of the trust is evaluated from most specific to the  least  specific.  In  other
       words, a policy may be:

              • Defined to an entire registry.

              • Defined to a particular repository in that registry.

              • Defined to a specific signed image inside of the registry.

       The  following  list  are  examples  of  valid  scope values used in policy.json from most
       specific to the least specific:

       docker.io/library/busybox:notlatest

       docker.io/library/busybox

       docker.io/library

       docker.io

       If no configuration is found for any of these scopes,  the  default  value  (specified  by
       using "default" instead of REGISTRY[/REPOSITORY]) is used.

       Trust type provides a way to:

       Allowlist  ("accept")  or  Denylist  ("reject")  registries  or  Require  a simple signing
       signature (“signedBy”), Require a sigstore signature ("sigstoreSigned").

       Trust may be updated using the command podman image trust set for an existing trust scope.

OPTIONS

   --help, -h
       Print usage statement.

   set OPTIONS
   --pubkeysfile, -f=KEY1
       A path to an exported public key on the local system. Key paths
         are referenced in policy.json. Any path to a file may be used but locating the  file  in
       /etc/pki/containers is recommended. Options may be used multiple times to
         require  an  image be signed by multiple keys.  The --pubkeysfile option is required for
       the signedBy and sigstoreSigned types.

   --type, -t=value
       The trust type for this policy entry.
         Accepted values:
           signedBy (default): Require simple signing signatures with corresponding list of
                               public keys
           sigstoreSigned: Require sigstore signatures with corresponding list of
                               public keys
           accept: do not require any signatures for this
                   registry scope
           reject: do not accept images for this registry scope

   show OPTIONS
   --json, -j
       Output trust as JSON for machine parsing

   --noheading, -n
       Omit the table headings from the listing.

   --raw
       Output trust policy file as raw JSON

EXAMPLES

       Accept all unsigned images from a registry

       sudo podman image trust set --type accept docker.io

       Modify default trust policy

       sudo podman image trust set -t reject default

       Display system trust policy

       podman image trust show

       TRANSPORT      NAME                        TYPE        ID                   STORE
       all            default                     reject
       repository     docker.io/library           accept
       repository     registry.access.redhat.com  signed      security@redhat.com  https://access.redhat.com/webassets/docker/content/sigstore
       repository     registry.redhat.io          signed      security@redhat.com  https://registry.redhat.io/containers/sigstore
       repository     docker.io                   reject
       docker-daemon                              accept

       Display trust policy file

       podman image trust show --raw

       {
           "default": [
               {
                   "type": "reject"
               }
           ],
           "transports": {
               "docker": {
                   "docker.io": [
                       {
                           "type": "reject"
                       }
                   ],
                   "docker.io/library": [
                       {
                           "type": "insecureAcceptAnything"
                       }
                   ],
                   "registry.access.redhat.com": [
                       {
                           "type": "signedBy",
                           "keyType": "GPGKeys",
                           "keyPath": "/etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release"
                       }
                   ],
                   "registry.redhat.io": [
                       {
                           "type": "signedBy",
                           "keyType": "GPGKeys",
                           "keyPath": "/etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release"
                       }
                   ]
               },
               "docker-daemon": {
                   "": [
                       {
                           "type": "insecureAcceptAnything"
                       }
                   ]
               }
           }
       }

       Display trust as JSON

       podman image trust show --json

       [
         {
           "transport": "all",
           "name": "* (default)",
           "repo_name": "default",
           "type": "reject"
         },
         {
           "transport": "repository",
           "name": "docker.io",
           "repo_name": "docker.io",
           "type": "reject"
         },
         {
           "transport": "repository",
           "name": "docker.io/library",
           "repo_name": "docker.io/library",
           "type": "accept"
         },
         {
           "transport": "repository",
           "name": "registry.access.redhat.com",
           "repo_name": "registry.access.redhat.com",
           "sigstore": "https://access.redhat.com/webassets/docker/content/sigstore",
           "type": "signed",
           "gpg_id": "security@redhat.com"
         },
         {
           "transport": "repository",
           "name": "registry.redhat.io",
           "repo_name": "registry.redhat.io",
           "sigstore": "https://registry.redhat.io/containers/sigstore",
           "type": "signed",
           "gpg_id": "security@redhat.com"
         },
         {
           "transport": "docker-daemon",
           "type": "accept"
         }
       ]

SEE ALSO

       containers-policy.json(5)

HISTORY

       January 2019, updated  by  Tom  Sweeney  (tsweeney  at  redhat  dot  com)  December  2018,
       originally compiled by Qi Wang (qiwan at redhat dot com)

                                                                            podman-image-trust(1)