202 lines
6.0 KiB
Markdown
202 lines
6.0 KiB
Markdown
% podman-image-trust 1
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## NAME
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podman\-image\-trust - Manage container registry image trust policy
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## SYNOPSIS
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**podman image trust** set|show [*options*] *registry[/repository]*
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## DESCRIPTION
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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)
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The location is determined
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by the transport and the registry host of the image. Using this container image `docker://docker.io/library/busybox`
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as an example, `docker` is the transport and `docker.io` is the registry host.
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Trust is defined in **/etc/containers/policy.json** and is enforced when a user attempts to pull
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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.
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The scope of the trust is evaluated from most specific to the least specific. In other words, a policy may be:
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* Defined to an entire registry.
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* Defined to a particular repository in that registry.
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* Defined to a specific signed image inside of the registry.
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The following list are examples of valid scope values used in policy.json from most specific to the least specific:
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docker.io/library/busybox:notlatest
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docker.io/library/busybox
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docker.io/library
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docker.io
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If no configuration is found for any of these scopes, the default value (specified by using "default" instead of REGISTRY[/REPOSITORY]) is used.
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Trust **type** provides a way to:
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Allowlist ("accept") or
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Denylist ("reject") registries or
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Require a simple signing signature (“signedBy”),
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Require a sigstore signature ("sigstoreSigned").
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Trust may be updated using the command **podman image trust set** for an existing trust scope.
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## OPTIONS
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#### **--help**, **-h**
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Print usage statement.
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### set OPTIONS
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#### **--pubkeysfile**, **-f**=*KEY1*
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A path to an exported public key on the local system. Key paths
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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
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require an image be signed by multiple keys. The **--pubkeysfile** option is required for the **signedBy** and **sigstoreSigned** types.
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#### **--type**, **-t**=*value*
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The trust type for this policy entry.
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Accepted values:
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**signedBy** (default): Require simple signing signatures with corresponding list of
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public keys
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**sigstoreSigned**: Require sigstore signatures with corresponding list of
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public keys
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**accept**: do not require any signatures for this
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registry scope
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**reject**: do not accept images for this registry scope
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### show OPTIONS
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#### **--json**, **-j**
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Output trust as JSON for machine parsing
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@@option noheading
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#### **--raw**
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Output trust policy file as raw JSON
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## EXAMPLES
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Accept all unsigned images from a registry
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sudo podman image trust set --type accept docker.io
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Modify default trust policy
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sudo podman image trust set -t reject default
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Display system trust policy
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podman image trust show
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```
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TRANSPORT NAME TYPE ID STORE
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all default reject
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repository docker.io/library accept
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repository registry.access.redhat.com signed security@redhat.com https://access.redhat.com/webassets/docker/content/sigstore
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repository registry.redhat.io signed security@redhat.com https://registry.redhat.io/containers/sigstore
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repository docker.io reject
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docker-daemon accept
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```
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Display trust policy file
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podman image trust show --raw
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```
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{
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"default": [
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{
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"type": "reject"
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}
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],
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"transports": {
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"docker": {
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"docker.io": [
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{
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"type": "reject"
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}
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],
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"docker.io/library": [
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{
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"type": "insecureAcceptAnything"
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}
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],
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"registry.access.redhat.com": [
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{
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"type": "signedBy",
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"keyType": "GPGKeys",
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"keyPath": "/etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release"
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}
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],
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"registry.redhat.io": [
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{
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"type": "signedBy",
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"keyType": "GPGKeys",
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"keyPath": "/etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release"
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}
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]
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},
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"docker-daemon": {
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"": [
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{
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"type": "insecureAcceptAnything"
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}
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]
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}
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}
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}
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```
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Display trust as JSON
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podman image trust show --json
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```
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[
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{
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"transport": "all",
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"name": "* (default)",
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"repo_name": "default",
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"type": "reject"
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},
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{
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"transport": "repository",
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"name": "docker.io",
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"repo_name": "docker.io",
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"type": "reject"
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},
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{
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"transport": "repository",
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"name": "docker.io/library",
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"repo_name": "docker.io/library",
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"type": "accept"
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},
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{
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"transport": "repository",
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"name": "registry.access.redhat.com",
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"repo_name": "registry.access.redhat.com",
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"sigstore": "https://access.redhat.com/webassets/docker/content/sigstore",
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"type": "signed",
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"gpg_id": "security@redhat.com"
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},
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{
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"transport": "repository",
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"name": "registry.redhat.io",
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"repo_name": "registry.redhat.io",
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"sigstore": "https://registry.redhat.io/containers/sigstore",
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"type": "signed",
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"gpg_id": "security@redhat.com"
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},
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{
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"transport": "docker-daemon",
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"type": "accept"
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}
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]
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```
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## SEE ALSO
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**[containers-policy.json(5)](https://github.com/containers/image/blob/main/docs/containers-policy.json.5.md)**
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## HISTORY
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January 2019, updated by Tom Sweeney (tsweeney at redhat dot com)
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December 2018, originally compiled by Qi Wang (qiwan at redhat dot com)
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