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% podman-image-trust "1"
# NAME
podman\-trust - Manage container image trust policy
# SYNOPSIS
**podman image trust set|show**
[**-h**|**--help**]
[**-j**|**--json**]
[**--raw**]
[**-f**|**--pubkeysfile** KEY1 [**f**|**--pubkeysfile** KEY2,...]]
[**-t**|**--type** signedBy|accept|reject]
REGISTRY[/REPOSITORY]
# DESCRIPTION
Manages the trust policy of the host system. Trust policy describes
a registry scope (registry and/or repository) that must be signed by public keys. Trust
is defined in **/etc/containers/policy.json**. Trust is enforced when a user attempts to pull
an image from a registry.
Trust scope is evaluated by most specific to least specific. In other words, policy may
be defined for an entire registry, but refined for a particular repository in that
registry. See below for examples.
Trust **type** provides a way to whitelist ("accept") or blacklist
("reject") registries.
Trust may be updated using the command **podman image trust set** for an existing trust scope.
# OPTIONS
**-h** **--help**
Print usage statement.
**-f** **--pubkeysfile**
A path to an exported public key on the local system. Key paths
will be referenced in policy.json. Any path may be used but path
**/etc/pki/containers** is recommended. Option may be used multiple times to
require an image be sigend by multiple keys. One of **--pubkeys** or
**--pubkeysfile** is required for **signedBy** type.
**-t** **--type**
The trust type for this policy entry. Accepted values:
**signedBy** (default): Require 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
**--raw**
Output trust policy file as raw JSON
**-j** **--json**
Output trust as JSON for machine parsing
# EXAMPLES
Accept all unsigned images from a registry
podman image trust set --type accept docker.io
Modify default trust policy
podman image trust set -t reject default
Display system trust policy
podman image trust show
Display trust policy file
podman image trust show --raw
Display trust as JSON
podman image trust show --json
# HISTORY
December 2018, originally compiled by Qi Wang (qiwan at redhat dot com)
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