identity

package
v1.15.4 Latest Latest
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 Go to latest Published: Apr 11, 2024 License: Apache-2.0 Imports: 15 Imported by: 105

Documentation

Overview

Package identity contains code for managing security identities in Cilium. +groupName=pkg

Index

Constants

View Source 
const (
	NodeLocalIdentityType    = "node_local"
	ReservedIdentityType     = "reserved"
	ClusterLocalIdentityType = "cluster_local"
	WellKnownIdentityType    = "well_known"
	RemoteNodeIdentityType   = "remote_node"
)
View Source 
const (

	// IdentityScopeMask is the top 8 bits of the 32 bit identity
	IdentityScopeMask = NumericIdentity(0xFF_00_00_00)

	// IdentityScopeGlobal is the identity scope used by global and reserved identities.
	IdentityScopeGlobal = NumericIdentity(0)

	// IdentityScopeLocal is the tag in the numeric identity that identifies
	// a numeric identity to have local (CIDR) scope.
	IdentityScopeLocal = NumericIdentity(1 << 24)

	// IdentityScopeRemoteNode is the tag in the numeric identity that identifies
	// an identity to be a remote in-cluster node.
	IdentityScopeRemoteNode = NumericIdentity(2 << 24)

	// MinAllocatorLocalIdentity represents the minimal numeric identity
	// that the localIdentityCache allocator can allocate for a local (CIDR)
	// identity.
	//
	// Note that this does not represents the minimal value for a local
	// identity, as the allocated ID will then be bitwise OR'ed with
	// LocalIdentityFlag.
	MinAllocatorLocalIdentity = 1

	// MinLocalIdentity represents the actual minimal numeric identity value
	// for a local (CIDR) identity.
	MinLocalIdentity = MinAllocatorLocalIdentity | IdentityScopeLocal

	// MaxAllocatorLocalIdentity represents the maximal numeric identity
	// that the localIdentityCache allocator can allocate for a local (CIDR)
	// identity.
	//
	// Note that this does not represents the maximal value for a local
	// identity, as the allocated ID will then be bitwise OR'ed with
	// LocalIdentityFlag.
	MaxAllocatorLocalIdentity = 0xFFFFFF

	// MaxLocalIdentity represents the actual maximal numeric identity value
	// for a local (CIDR) identity.
	MaxLocalIdentity = MaxAllocatorLocalIdentity | IdentityScopeLocal

	// MinimalNumericIdentity represents the minimal numeric identity not
	// used for reserved purposes.
	MinimalNumericIdentity = NumericIdentity(256)

	// UserReservedNumericIdentity represents the minimal numeric identity that
	// can be used by users for reserved purposes.
	UserReservedNumericIdentity = NumericIdentity(128)

	// InvalidIdentity is the identity assigned if the identity is invalid
	// or not determined yet
	InvalidIdentity = NumericIdentity(0)
)
View Source 
const MaxNumericIdentity = math.MaxUint32

MaxNumericIdentity is the maximum value of a NumericIdentity.

View Source 
const NumericIdentityBitlength = 24

NumericIdentityBitlength is the number of bits used on the wire for a NumericIdentity

Variables

View Source 
var (

	// WellKnown identities stores global state of all well-known identities.
	WellKnown = wellKnownIdentities{}

	// ErrNotUserIdentity is an error returned for an identity that is not user
	// reserved.
	ErrNotUserIdentity = errors.New("not a user reserved identity")
)

Functions

func AddUserDefinedNumericIdentity 

func AddUserDefinedNumericIdentity(identity NumericIdentity, label string) error

AddUserDefinedNumericIdentity adds the given numeric identity and respective label to the list of reservedIdentities. If the numeric identity is not between UserReservedNumericIdentity and MinimalNumericIdentity it will return ErrNotUserIdentity. Is not safe for concurrent use.

func AddUserDefinedNumericIdentitySet 

func AddUserDefinedNumericIdentitySet(m map[string]string) error

AddUserDefinedNumericIdentitySet adds all key-value pairs from the given map to the map of user defined numeric identities and reserved identities. The key-value pairs should map a numeric identity to a valid label. Is not safe for concurrent use.

func DelReservedNumericIdentity 

func DelReservedNumericIdentity(identity NumericIdentity) error

DelReservedNumericIdentity deletes the given Numeric Identity from the list of reservedIdentities. If the numeric identity is not between UserReservedNumericIdentity and MinimalNumericIdentity it will return ErrNotUserIdentity. Is not safe for concurrent use.

func GetClusterIDShift added in v1.15.0 

func GetClusterIDShift() uint32

GetClusterIDShift returns the number of bits to shift a cluster ID in a numeric identity and is equal to the number of bits that represent a cluster-local identity. A sync.Once is used to ensure we only initialize clusterIDShift once.

func IdentityAllocationIsLocal 

func IdentityAllocationIsLocal(lbls labels.Labels) bool

IdentityAllocationIsLocal returns true if a call to AllocateIdentity with the given labels would not require accessing the KV store to allocate the identity. Currently, this function returns true only if the labels are those of a reserved identity, i.e. if the slice contains a single reserved "reserved:*" label.

func InitWellKnownIdentities 

func InitWellKnownIdentities(c Configuration, cinfo cmtypes.ClusterInfo) int

InitWellKnownIdentities establishes all well-known identities. Returns the number of well-known identities initialized.

func IsUserReservedIdentity 

func IsUserReservedIdentity(id NumericIdentity) bool

IsUserReservedIdentity returns true if the given NumericIdentity belongs to the space reserved for users.

func IsWellKnownIdentity 

func IsWellKnownIdentity(id NumericIdentity) bool

IsWellKnownIdentity returns true if the identity represents a well-known identity, false otherwise.

func IterateReservedIdentities 

func IterateReservedIdentities(f func(_ NumericIdentity, _ *Identity))

IterateReservedIdentities iterates over all reserved identities and executes the given function for each identity.

func RequiresGlobalIdentity 

func RequiresGlobalIdentity(lbls labels.Labels) bool

RequiresGlobalIdentity returns true if the label combination requires a global identity

func SetLocalNodeID 

func SetLocalNodeID(nodeid uint32)

SetLocalNodeID sets the local node id. Note that currently changes to the local node id only take effect during agent bootstrap

Types

type Configuration 

type Configuration interface {
	CiliumNamespaceName() string
}

type IPIdentityPair 

type IPIdentityPair struct {
	IP           net.IP          `json:"IP"`
	Mask         net.IPMask      `json:"Mask"`
	HostIP       net.IP          `json:"HostIP"`
	ID           NumericIdentity `json:"ID"`
	Key          uint8           `json:"Key"`
	Metadata     string          `json:"Metadata"`
	K8sNamespace string          `json:"K8sNamespace,omitempty"`
	K8sPodName   string          `json:"K8sPodName,omitempty"`
	NamedPorts   []NamedPort     `json:"NamedPorts,omitempty"`
}

IPIdentityPair is a pairing of an IP and the security identity to which that IP corresponds. May include an optional Mask which, if present, denotes that the IP represents a CIDR with the specified Mask.

WARNING - STABLE API This structure is written as JSON to the key-value store. Do NOT modify this structure in ways which are not JSON forward compatible.

func (*IPIdentityPair) GetKeyName 

func (pair *IPIdentityPair) GetKeyName() string

GetKeyName returns the kvstore key to be used for the IPIdentityPair

func (*IPIdentityPair) IsHost 

func (pair *IPIdentityPair) IsHost() bool

IsHost determines whether the IP in the pair represents a host (true) or a CIDR prefix (false)

func (*IPIdentityPair) Marshal 

func (pair *IPIdentityPair) Marshal() ([]byte, error)

Marshal returns the IPIdentityPair object as JSON byte slice

func (*IPIdentityPair) PrefixString 

func (pair *IPIdentityPair) PrefixString() string

PrefixString returns the IPIdentityPair's IP as either a host IP in the format w.x.y.z if 'host' is true, or as a prefix in the format the w.x.y.z/N if 'host' is false.

func (*IPIdentityPair) Unmarshal 

func (pair *IPIdentityPair) Unmarshal(_ string, data []byte) error

Unmarshal parses the JSON byte slice and updates the IPIdentityPair receiver

type Identity 

type Identity struct {
	// Identity's ID.
	ID NumericIdentity `json:"id"`
	// Set of labels that belong to this Identity.
	Labels labels.Labels `json:"labels"`

	// LabelArray contains the same labels as Labels in a form of a list, used
	// for faster lookup.
	LabelArray labels.LabelArray `json:"-"`

	// CIDRLabel is the primary identity label when the identity represents
	// a CIDR. The Labels field will consist of all matching prefixes, e.g.
	// 10.0.0.0/8
	// 10.0.0.0/7
	// 10.0.0.0/6
	// [...]
	// reserved:world
	//
	// The CIDRLabel field will only contain 10.0.0.0/8
	CIDRLabel labels.Labels `json:"-"`

	// ReferenceCount counts the number of references pointing to this
	// identity. This field is used by the owning cache of the identity.
	ReferenceCount int `json:"-"`
}

Identity is the representation of the security context for a particular set of labels.

func AddReservedIdentity 

func AddReservedIdentity(ni NumericIdentity, lbl string) *Identity

AddReservedIdentity adds the reserved numeric identity with the respective label into the map of reserved identity cache, and returns the resulting Identity. This identity must not be mutated!

func AddReservedIdentityWithLabels 

func AddReservedIdentityWithLabels(ni NumericIdentity, lbls labels.Labels) *Identity

AddReservedIdentityWithLabels is the same as AddReservedIdentity but accepts multiple labels. Returns the resulting Identity. This identity must not be mutated!

func LookupReservedIdentity 

func LookupReservedIdentity(ni NumericIdentity) *Identity

LookupReservedIdentity looks up a reserved identity by its NumericIdentity and returns it if found. Returns nil if not found. This identity must not be mutated!

func LookupReservedIdentityByLabels 

func LookupReservedIdentityByLabels(lbls labels.Labels) *Identity

LookupReservedIdentityByLabels looks up a reserved identity by its labels and returns it if found. Returns nil if not found.

func NewIdentity 

func NewIdentity(id NumericIdentity, lbls labels.Labels) *Identity

NewIdentity creates a new identity

func NewIdentityFromLabelArray 

func NewIdentityFromLabelArray(id NumericIdentity, lblArray labels.LabelArray) *Identity

NewIdentityFromLabelArray creates a new identity

func (*Identity) IsFixed 

func (id *Identity) IsFixed() bool

IsFixed returns whether the identity represents a fixed identity (true), or not (false).

func (*Identity) IsReserved 

func (id *Identity) IsReserved() bool

IsReserved returns whether the identity represents a reserved identity (true), or not (false).

func (*Identity) IsWellKnown 

func (id *Identity) IsWellKnown() bool

IsWellKnown returns whether the identity represents a well known identity (true), or not (false).

func (*Identity) Sanitize 

func (id *Identity) Sanitize()

Sanitize takes a partially initialized Identity (for example, deserialized from json) and reconstitutes the full object from what has been restored.

func (*Identity) String 

func (id *Identity) String() string

StringID returns the identity identifier as string

func (*Identity) StringID 

func (id *Identity) StringID() string

StringID returns the identity identifier as string

type NamedPort 

type NamedPort struct {
	Name     string `json:"Name"`
	Port     uint16 `json:"Port"`
	Protocol string `json:"Protocol"`
}

NamedPort is a mapping from a port name to a port number and protocol.

WARNING - STABLE API This structure is written as JSON to the key-value store. Do NOT modify this structure in ways which are not JSON forward compatible.

type NumericIdentity 

type NumericIdentity uint32

NumericIdentity is the numeric representation of a security identity.

Bits: 

 0-15: identity identifier
16-23: cluster identifier
   24: LocalIdentityFlag: Indicates that the identity has a local scope

const (
	// IdentityUnknown represents an unknown identity
	IdentityUnknown NumericIdentity = iota

	// ReservedIdentityHost represents the local host
	ReservedIdentityHost

	// ReservedIdentityWorld represents any endpoint outside of the cluster
	ReservedIdentityWorld

	// ReservedIdentityUnmanaged represents unmanaged endpoints.
	ReservedIdentityUnmanaged

	// ReservedIdentityHealth represents the local cilium-health endpoint
	ReservedIdentityHealth

	// ReservedIdentityInit is the identity given to endpoints that have not
	// received any labels yet.
	ReservedIdentityInit

	// ReservedIdentityRemoteNode is the identity given to all nodes in
	// local and remote clusters except for the local node.
	ReservedIdentityRemoteNode

	// ReservedIdentityKubeAPIServer is the identity given to remote node(s) which
	// have backend(s) serving the kube-apiserver running.
	ReservedIdentityKubeAPIServer

	// ReservedIdentityIngress is the identity given to the IP used as the source
	// address for connections from Ingress proxies.
	ReservedIdentityIngress

	// ReservedIdentityWorldIPv4 represents any endpoint outside of the cluster
	// for IPv4 address only.
	ReservedIdentityWorldIPv4

	// ReservedIdentityWorldIPv6 represents any endpoint outside of the cluster
	// for IPv6 address only.
	ReservedIdentityWorldIPv6
)
const (
	// ReservedETCDOperator is the reserved identity used for the etcd-operator
	// managed by Cilium.
	ReservedETCDOperator NumericIdentity = iota + 100

	// ReservedCiliumKVStore is the reserved identity used for the kvstore
	// managed by Cilium (etcd-operator).
	ReservedCiliumKVStore

	// ReservedKubeDNS is the reserved identity used for kube-dns.
	ReservedKubeDNS

	// ReservedEKSKubeDNS is the reserved identity used for kube-dns on EKS
	ReservedEKSKubeDNS

	// ReservedCoreDNS is the reserved identity used for CoreDNS
	ReservedCoreDNS

	// ReservedCiliumOperator is the reserved identity used for the Cilium operator
	ReservedCiliumOperator

	// ReservedEKSCoreDNS is the reserved identity used for CoreDNS on EKS
	ReservedEKSCoreDNS

	// ReservedCiliumEtcdOperator is the reserved identity used for the Cilium etcd operator
	ReservedCiliumEtcdOperator

	// Second identities for all above components
	ReservedETCDOperator2
	ReservedCiliumKVStore2
	ReservedKubeDNS2
	ReservedEKSKubeDNS2
	ReservedCoreDNS2
	ReservedCiliumOperator2
	ReservedEKSCoreDNS2
	ReservedCiliumEtcdOperator2
)

Special identities for well-known cluster components Each component has two identities. The first one is used for Kubernetes <1.21 or when the NamespaceDefaultLabelName feature gate is disabled. The second one is used for Kubernetes >= 1.21 and when the NamespaceDefaultLabelName is enabled.

func GetAllReservedIdentities 

func GetAllReservedIdentities() []NumericIdentity

GetAllReservedIdentities returns a list of all reserved numeric identities in ascending order. NOTE: While this func is unused from the cilium repository, is it imported and called by the hubble cli.

func GetLocalNodeID 

func GetLocalNodeID() NumericIdentity

GetLocalNodeID returns the configured local node numeric identity that is set in tunnel headers when encapsulating packets originating from the local node.

func GetMaximumAllocationIdentity added in v1.15.0 

func GetMaximumAllocationIdentity() NumericIdentity

GetMaximumAllocationIdentity returns the maximum numeric identity that should be handed out by the identity allocator.

func GetMinimalAllocationIdentity added in v1.15.0 

func GetMinimalAllocationIdentity() NumericIdentity

GetMinimalNumericIdentity returns the minimal numeric identity not used for reserved purposes.

func GetReservedID 

func GetReservedID(name string) NumericIdentity

func GetWorldIdentityFromIP 

func GetWorldIdentityFromIP(addr netip.Addr) NumericIdentity

GetWorldIdentityFromIP gets the correct world identity based on the IP address version. If Cilium is not in dual-stack mode then ReservedIdentityWorld will always be returned.

func ParseNumericIdentity 

func ParseNumericIdentity(id string) (NumericIdentity, error)

func ScopeForLabels added in v1.15.0 

func ScopeForLabels(lbls labels.Labels) NumericIdentity

ScopeForLabels returns the identity scope to be used for the label set. If all labels are either CIDR or reserved, then returns the CIDR scope. Note: This assumes the caller has already called LookupReservedIdentityByLabels; it does not handle that case.

func (NumericIdentity) ClusterID 

func (id NumericIdentity) ClusterID() uint32

ClusterID returns the cluster ID associated with the identity

func (NumericIdentity) HasLocalScope 

func (id NumericIdentity) HasLocalScope() bool

HasLocalScope returns true if the identity is in the Local (CIDR) scope

func (NumericIdentity) HasRemoteNodeScope added in v1.15.0 

func (id NumericIdentity) HasRemoteNodeScope() bool

func (NumericIdentity) IsCluster added in v1.12.18 

func (id NumericIdentity) IsCluster() bool

IsCluster returns true if the identity is a cluster identity by excluding all identities that are known to be non-cluster identities. NOTE: keep this and bpf identity_is_cluster() in sync!

func (NumericIdentity) IsReservedIdentity 

func (id NumericIdentity) IsReservedIdentity() bool

IsReservedIdentity returns whether id is one of the special reserved identities.

func (NumericIdentity) IsWorld 

func (id NumericIdentity) IsWorld() bool

IsWorld returns true if the identity is one of the world identities

func (NumericIdentity) Scope added in v1.15.0 

func (id NumericIdentity) Scope() NumericIdentity

Scope returns the identity scope of this given numeric ID.

func (NumericIdentity) String 

func (id NumericIdentity) String() string

func (NumericIdentity) StringID 

func (id NumericIdentity) StringID() string

func (NumericIdentity) Uint32 

func (id NumericIdentity) Uint32() uint32

Uint32 normalizes the ID for use in BPF program.

type NumericIdentitySlice added in v1.15.0 

type NumericIdentitySlice []NumericIdentity

func (NumericIdentitySlice) AsUint32Slice added in v1.15.0 

func (nids NumericIdentitySlice) AsUint32Slice() []uint32

AsUint32Slice returns the NumericIdentitySlice as a slice of uint32 without copying any data. This is safe as long as the underlying type stays as uint32.

Source Files

View all Source files

Directories

Path Synopsis
Package identitymanager tracks which global identities are being used by the currently running cilium-agent
 Package identitymanager tracks which global identities are being used by the currently running cilium-agent

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