Description

ImageSignature holds a signature of an image. It allows to verify image identity and possibly other claims as long as the signature is trusted. Based on this information it is possible to restrict runnable images to those matching cluster-wide policy. Mandatory fields should be parsed by clients doing image verification. The others are parsed from signature's content by the server. They serve just an informative purpose.

Type

object

Required
  • type

  • content

Specification

Property Type Description

.apiVersion

string

APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources

.conditions

array

Conditions represent the latest available observations of a signature’s current state.

.conditions[]

object

SignatureCondition describes an image signature condition of particular kind at particular probe time.

.content

string

Required: An opaque binary string which is an image’s signature.

.created

Time meta/v1

If specified, it is the time of signature’s creation.

.imageIdentity

string

A human readable string representing image’s identity. It could be a product name and version, or an image pull spec (e.g. "registry.access.redhat.com/rhel7/rhel:7.2").

.issuedBy

object

SignatureIssuer holds information about an issuer of signing certificate or key.

.issuedTo

object

SignatureSubject holds information about a person or entity who created the signature.

.kind

string

Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds

.metadata

ObjectMeta meta/v1

.signedClaims

object (string)

Contains claims from the signature.

.type

string

Required: Describes a type of stored blob.

.conditions
Description

Conditions represent the latest available observations of a signature's current state.

Type

array

.conditions[]
Description

SignatureCondition describes an image signature condition of particular kind at particular probe time.

Type

object

Required
  • type

  • status

Property Type Description

lastProbeTime

Time meta/v1

Last time the condition was checked.

lastTransitionTime

Time meta/v1

Last time the condition transit from one status to another.

message

string

Human readable message indicating details about last transition.

reason

string

(brief) reason for the condition’s last transition.

status

string

Status of the condition, one of True, False, Unknown.

type

string

Type of signature condition, Complete or Failed.

.issuedBy
Description

SignatureIssuer holds information about an issuer of signing certificate or key.

Type

object

Property Type Description

commonName

string

Common name (e.g. openshift-signing-service).

organization

string

Organization name.

.issuedTo
Description

SignatureSubject holds information about a person or entity who created the signature.

Type

object

Required
  • publicKeyID

Property Type Description

commonName

string

Common name (e.g. openshift-signing-service).

organization

string

Organization name.

publicKeyID

string

If present, it is a human readable key id of public key belonging to the subject used to verify image signature. It should contain at least 64 lowest bits of public key’s fingerprint (e.g. 0x685ebe62bf278440).