ca

package
v0.0.0-...-1a11905 Latest Latest
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 Go to latest Published: Aug 25, 2020 License: Apache-2.0 Imports: 56 Imported by: 4

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var DisableIdentity = false

DisableIdentity is a global variable to disable the identity.

View Source 
var UserAgent = "step-http-client/1.0"

UserAgent will set the User-Agent header in the client requests.

Functions

func BootstrapClient 

func BootstrapClient(ctx context.Context, token string, options ...TLSOption) (*http.Client, error)

BootstrapClient is a helper function that using the given bootstrap token return an http.Client configured with a Transport prepared to do TLS connections using the client certificate returned by the certificate authority. By default the server will kick off a routine that will renew the certificate after 2/3rd of the certificate's lifetime has expired.

Usage: 

// Default example with certificate rotation.
client, err := ca.BootstrapClient(ctx.Background(), token)

// Example canceling automatic certificate rotation.
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
client, err := ca.BootstrapClient(ctx, token)
if err != nil {
  return err
}
resp, err := client.Get("https://internal.smallstep.com")

func BootstrapListener 

func BootstrapListener(ctx context.Context, token string, inner net.Listener, options ...TLSOption) (net.Listener, error)

BootstrapListener is a helper function that using the given token returns a TLS listener which accepts connections from an inner listener and wraps each connection with Server.

Without any extra option the server will be configured for mTLS, it will require and verify clients certificates, but options can be used to drop this requirement, the most common will be only verify the certs if given with ca.VerifyClientCertIfGiven(), or add extra CAs with ca.AddClientCA(*x509.Certificate).

Usage: 

inner, err := net.Listen("tcp", ":443")
if err != nil {
  return nil
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
lis, err := ca.BootstrapListener(ctx, token, inner)
if err != nil {
    return err
}
srv := grpc.NewServer()
... // register services
srv.Serve(lis)

func BootstrapServer 

func BootstrapServer(ctx context.Context, token string, base *http.Server, options ...TLSOption) (*http.Server, error)

BootstrapServer is a helper function that using the given token returns the given http.Server configured with a TLS certificate signed by the Certificate Authority. By default the server will kick off a routine that will renew the certificate after 2/3rd of the certificate's lifetime has expired.

Without any extra option the server will be configured for mTLS, it will require and verify clients certificates, but options can be used to drop this requirement, the most common will be only verify the certs if given with ca.VerifyClientCertIfGiven(), or add extra CAs with ca.AddClientCA(*x509.Certificate).

Usage: 

// Default example with certificate rotation.
srv, err := ca.BootstrapServer(context.Background(), token, &http.Server{
    Addr: ":443",
    Handler: handler,
})

// Example canceling automatic certificate rotation.
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
srv, err := ca.BootstrapServer(ctx, token, &http.Server{
    Addr: ":443",
    Handler: handler,
})
if err != nil {
    return err
}
srv.ListenAndServeTLS("", "")

func Certificate 

func Certificate(sign *api.SignResponse) (*x509.Certificate, error)

Certificate returns the server or client certificate from the sign response.

func CreateCertificateRequest 

func CreateCertificateRequest(commonName string, sans ...string) (*api.CertificateRequest, crypto.PrivateKey, error)

CreateCertificateRequest creates a new CSR with the given common name and SANs. If no san is provided the commonName will set also a SAN.

func CreateIdentityRequest 

func CreateIdentityRequest(commonName string, sans ...string) (*api.CertificateRequest, crypto.PrivateKey, error)

CreateIdentityRequest returns a new CSR to create the identity. If an identity was already present it reuses the private key.

func CreateSignRequest 

func CreateSignRequest(ott string) (*api.SignRequest, crypto.PrivateKey, error)

CreateSignRequest is a helper function that given an x509 OTT returns a simple but secure sign request as well as the private key used.

func IntermediateCertificate 

func IntermediateCertificate(sign *api.SignResponse) (*x509.Certificate, error)

IntermediateCertificate returns the CA intermediate certificate from the sign response.

func LoadDefaultIdentity 

func LoadDefaultIdentity() (*identity.Identity, error)

LoadDefaultIdentity is a wrapper for identity.LoadDefaultIdentity.

func RootCertificate 

func RootCertificate(sign *api.SignResponse) (*x509.Certificate, error)

RootCertificate returns the root certificate from the sign response.

func StopHandler 

func StopHandler(servers ...Stopper)

StopHandler watches SIGINT, SIGTERM on a list of servers implementing the Stopper interface, and when one of those signals is caught we'll run Stop (SIGINT, SIGTERM) on all servers.

func StopReloaderHandler 

func StopReloaderHandler(servers ...StopReloader)

StopReloaderHandler watches SIGINT, SIGTERM and SIGHUP on a list of servers implementing the StopReloader interface, and when one of those signals is caught we'll run Stop (SIGINT, SIGTERM) or Reload (SIGHUP) on all servers.

func TLSCertificate 

func TLSCertificate(sign *api.SignResponse, pk crypto.PrivateKey) (*tls.Certificate, error)

TLSCertificate creates a new TLS certificate from the sign response and the private key used.

func WithRenewBefore 

func WithRenewBefore(b time.Duration) func(r *TLSRenewer) error

WithRenewBefore modifies a tlsRenewer by setting the renewBefore attribute.

func WithRenewJitter 

func WithRenewJitter(j time.Duration) func(r *TLSRenewer) error

WithRenewJitter modifies a tlsRenewer by setting the renewJitter attribute.

func WriteDefaultIdentity 

func WriteDefaultIdentity(certChain []api.Certificate, key crypto.PrivateKey) error

WriteDefaultIdentity is a wrapper for identity.WriteDefaultIdentity.

Types

type ACMEClient 

type ACMEClient struct {
	Key *jose.JSONWebKey
	// contains filtered or unexported fields
}

ACMEClient implements an HTTP client to an ACME API.

func NewACMEClient 

func NewACMEClient(endpoint string, contact []string, opts ...ClientOption) (*ACMEClient, error)

NewACMEClient initializes a new ACMEClient.

func (*ACMEClient) FinalizeOrder 

func (c *ACMEClient) FinalizeOrder(url string, csr *x509.CertificateRequest) error

FinalizeOrder makes a finalize request to the ACME api.

func (*ACMEClient) GetAccountOrders 

func (c *ACMEClient) GetAccountOrders() ([]string, error)

GetAccountOrders retrieves the orders belonging to the given account.

func (*ACMEClient) GetAuthz 

func (c *ACMEClient) GetAuthz(url string) (*acme.Authz, error)

GetAuthz returns the Authz at the given path.

func (*ACMEClient) GetCertificate 

func (c *ACMEClient) GetCertificate(url string) (*x509.Certificate, []*x509.Certificate, error)

GetCertificate retrieves the certificate along with all intermediates.

func (*ACMEClient) GetChallenge 

func (c *ACMEClient) GetChallenge(url string) (*acme.Challenge, error)

GetChallenge returns the Challenge at the given path. With the validate parameter set to True this method will attempt to validate the challenge before returning it.

func (*ACMEClient) GetDirectory 

func (c *ACMEClient) GetDirectory() (*acme.Directory, error)

GetDirectory makes a directory request to the ACME api and returns an ACME directory object.

func (*ACMEClient) GetNonce 

func (c *ACMEClient) GetNonce() (string, error)

GetNonce makes a nonce request to the ACME api and returns an ACME directory object.

func (*ACMEClient) GetOrder 

func (c *ACMEClient) GetOrder(url string) (*acme.Order, error)

GetOrder returns the Order at the given path.

func (*ACMEClient) NewOrder 

func (c *ACMEClient) NewOrder(payload []byte) (*acme.Order, error)

NewOrder creates and returns the information for a new ACME order.

func (*ACMEClient) ValidateChallenge 

func (c *ACMEClient) ValidateChallenge(url string) error

ValidateChallenge returns the Challenge at the given path. With the validate parameter set to True this method will attempt to validate the challenge before returning it.

type CA 

type CA struct {
	// contains filtered or unexported fields
}

CA is the type used to build the complete certificate authority. It builds the HTTP server, set ups the middlewares and the HTTP handlers.

func New 

func New(config *authority.Config, opts ...Option) (*CA, error)

New creates and initializes the CA with the given configuration and options.

func (*CA) Init 

func (ca *CA) Init(config *authority.Config) (*CA, error)

Init initializes the CA with the given configuration.

func (*CA) Reload 

func (ca *CA) Reload() error

Reload reloads the configuration of the CA and calls to the server Reload method.

func (*CA) Run 

func (ca *CA) Run() error

Run starts the CA calling to the server ListenAndServe method.

func (*CA) Stop 

func (ca *CA) Stop() error

Stop stops the CA calling to the server Shutdown method.

type Client 

type Client struct {
	// contains filtered or unexported fields
}

Client implements an HTTP client for the CA server.

func Bootstrap 

func Bootstrap(token string) (*Client, error)

Bootstrap is a helper function that initializes a client with the configuration in the bootstrap token.

func NewClient 

func NewClient(endpoint string, opts ...ClientOption) (*Client, error)

NewClient creates a new Client with the given endpoint and options.

func (*Client) Federation 

func (c *Client) Federation() (*api.FederationResponse, error)

Federation performs the get federation request to the CA and returns the api.FederationResponse struct.

func (*Client) GetClientTLSConfig 

func (c *Client) GetClientTLSConfig(ctx context.Context, sign *api.SignResponse, pk crypto.PrivateKey, options ...TLSOption) (*tls.Config, error)

GetClientTLSConfig returns a tls.Config for client use configured with the sign certificate, and a new certificate pool with the sign root certificate. The client certificate will automatically rotate before expiring.

func (*Client) GetRootCAs 

func (c *Client) GetRootCAs() *x509.CertPool

GetRootCAs returns the RootCAs certificate pool from the configured transport.

func (*Client) GetServerTLSConfig 

func (c *Client) GetServerTLSConfig(ctx context.Context, sign *api.SignResponse, pk crypto.PrivateKey, options ...TLSOption) (*tls.Config, error)

GetServerTLSConfig returns a tls.Config for server use configured with the sign certificate, and a new certificate pool with the sign root certificate. The returned tls.Config will only verify the client certificate if provided. The server certificate will automatically rotate before expiring.

func (*Client) Health 

func (c *Client) Health() (*api.HealthResponse, error)

Health performs the health request to the CA and returns the api.HealthResponse struct.

func (*Client) ProvisionerKey 

func (c *Client) ProvisionerKey(kid string) (*api.ProvisionerKeyResponse, error)

ProvisionerKey performs the request to the CA to get the encrypted key for the given provisioner kid and returns the api.ProvisionerKeyResponse struct with the encrypted key.

func (*Client) Provisioners 

func (c *Client) Provisioners(opts ...ProvisionerOption) (*api.ProvisionersResponse, error)

Provisioners performs the provisioners request to the CA and returns the api.ProvisionersResponse struct with a map of provisioners.

ProvisionerOption WithProvisionerCursor and WithProvisionLimit can be used to paginate the provisioners.

func (*Client) Renew 

func (c *Client) Renew(tr http.RoundTripper) (*api.SignResponse, error)

Renew performs the renew request to the CA and returns the api.SignResponse struct.

func (*Client) Revoke 

func (c *Client) Revoke(req *api.RevokeRequest, tr http.RoundTripper) (*api.RevokeResponse, error)

Revoke performs the revoke request to the CA and returns the api.RevokeResponse struct.

func (*Client) Root 

func (c *Client) Root(sha256Sum string) (*api.RootResponse, error)

Root performs the root request to the CA with the given SHA256 and returns the api.RootResponse struct. It uses an insecure client, but it checks the resulting root certificate with the given SHA256, returning an error if they do not match.

func (*Client) RootFingerprint 

func (c *Client) RootFingerprint() (string, error)

RootFingerprint is a helper method that returns the current root fingerprint. It does an health connection and gets the fingerprint from the TLS verified chains.

func (*Client) Roots 

func (c *Client) Roots() (*api.RootsResponse, error)

Roots performs the get roots request to the CA and returns the api.RootsResponse struct.

func (*Client) SSHBastion 

func (c *Client) SSHBastion(req *api.SSHBastionRequest) (*api.SSHBastionResponse, error)

SSHBastion performs the POST /ssh/bastion request to the CA.

func (*Client) SSHCheckHost 

func (c *Client) SSHCheckHost(principal string, token string) (*api.SSHCheckPrincipalResponse, error)

SSHCheckHost performs the POST /ssh/check-host request to the CA with the given principal.

func (*Client) SSHConfig 

func (c *Client) SSHConfig(req *api.SSHConfigRequest) (*api.SSHConfigResponse, error)

SSHConfig performs the POST /ssh/config request to the CA to get the ssh configuration templates.

func (*Client) SSHFederation 

func (c *Client) SSHFederation() (*api.SSHRootsResponse, error)

SSHFederation performs the get /ssh/federation request to the CA and returns the api.SSHRootsResponse struct.

func (*Client) SSHGetHosts 

func (c *Client) SSHGetHosts() (*api.SSHGetHostsResponse, error)

SSHGetHosts performs the GET /ssh/get-hosts request to the CA.

func (*Client) SSHRekey 

func (c *Client) SSHRekey(req *api.SSHRekeyRequest) (*api.SSHRekeyResponse, error)

SSHRekey performs the POST /ssh/rekey request to the CA and returns the api.SSHRekeyResponse struct.

func (*Client) SSHRenew 

func (c *Client) SSHRenew(req *api.SSHRenewRequest) (*api.SSHRenewResponse, error)

SSHRenew performs the POST /ssh/renew request to the CA and returns the api.SSHRenewResponse struct.

func (*Client) SSHRevoke 

func (c *Client) SSHRevoke(req *api.SSHRevokeRequest) (*api.SSHRevokeResponse, error)

SSHRevoke performs the POST /ssh/revoke request to the CA and returns the api.SSHRevokeResponse struct.

func (*Client) SSHRoots 

func (c *Client) SSHRoots() (*api.SSHRootsResponse, error)

SSHRoots performs the GET /ssh/roots request to the CA and returns the api.SSHRootsResponse struct.

func (*Client) SSHSign 

func (c *Client) SSHSign(req *api.SSHSignRequest) (*api.SSHSignResponse, error)

SSHSign performs the POST /ssh/sign request to the CA and returns the api.SSHSignResponse struct.

func (*Client) SetTransport 

func (c *Client) SetTransport(tr http.RoundTripper)

SetTransport updates the transport of the internal HTTP client.

func (*Client) Sign 

func (c *Client) Sign(req *api.SignRequest) (*api.SignResponse, error)

Sign performs the sign request to the CA and returns the api.SignResponse struct.

func (*Client) Transport 

func (c *Client) Transport(ctx context.Context, sign *api.SignResponse, pk crypto.PrivateKey, options ...TLSOption) (*http.Transport, error)

Transport returns an http.Transport configured to use the client certificate from the sign response.

func (*Client) Version 

func (c *Client) Version() (*api.VersionResponse, error)

Version performs the version request to the CA and returns the api.VersionResponse struct.

type ClientOption 

type ClientOption func(o *clientOptions) error

ClientOption is the type of options passed to the Client constructor.

func WithCABundle 

func WithCABundle(bundle []byte) ClientOption

WithCABundle will create the transport using the given root certificates. It will fail if a previous option to create the transport has been configured.

func WithCertificate 

func WithCertificate(crt tls.Certificate) ClientOption

WithCertificate will set the given certificate as the TLS client certificate in the client.

func WithRetryFunc 

func WithRetryFunc(fn RetryFunc) ClientOption

WithRetryFunc defines a method used to retry a request.

func WithRootFile 

func WithRootFile(filename string) ClientOption

WithRootFile will create the transport using the given root certificate. It will fail if a previous option to create the transport has been configured.

func WithRootSHA256 

func WithRootSHA256(sum string) ClientOption

WithRootSHA256 will create the transport using an insecure client to retrieve the root certificate using its fingerprint. It will fail if a previous option to create the transport has been configured.

func WithTransport 

func WithTransport(tr http.RoundTripper) ClientOption

WithTransport adds a custom transport to the Client. It will fail if a previous option to create the transport has been configured.

type Option 

type Option func(o *options)

Option is the type of options passed to the CA constructor.

func WithConfigFile 

func WithConfigFile(name string) Option

WithConfigFile sets the given name as the configuration file name in the CA options.

func WithDatabase 

func WithDatabase(db db.AuthDB) Option

WithDatabase sets the given authority database to the CA options.

func WithPassword 

func WithPassword(password []byte) Option

WithPassword sets the given password as the configured password in the CA options.

type Provisioner 

type Provisioner struct {
	*Client
	// contains filtered or unexported fields
}

Provisioner is an authorized entity that can sign tokens necessary for signature requests.

func NewProvisioner 

func NewProvisioner(name, kid, caURL string, password []byte, opts ...ClientOption) (*Provisioner, error)

NewProvisioner loads and decrypts key material from the CA for the named provisioner. The key identified by `kid` will be used if specified. If `kid` is the empty string we'll use the first key for the named provisioner that decrypts using `password`.

func (*Provisioner) Kid 

func (p *Provisioner) Kid() string

Kid returns the provisioners key ID.

func (*Provisioner) Name 

func (p *Provisioner) Name() string

Name returns the provisioner's name.

func (*Provisioner) SSHToken 

func (p *Provisioner) SSHToken(certType, keyID string, principals []string) (string, error)

SSHToken generates a SSH token.

func (*Provisioner) SetFingerprint 

func (p *Provisioner) SetFingerprint(sum string)

SetFingerprint overwrites the default fingerprint used.

func (*Provisioner) Token 

func (p *Provisioner) Token(subject string, sans ...string) (string, error)

Token generates a bootstrap token for a subject.

type ProvisionerOption 

type ProvisionerOption func(o *provisionerOptions) error

ProvisionerOption is the type of options passed to the Provisioner method.

func WithProvisionerCursor 

func WithProvisionerCursor(cursor string) ProvisionerOption

WithProvisionerCursor will request the provisioners starting with the given cursor.

func WithProvisionerLimit 

func WithProvisionerLimit(limit int) ProvisionerOption

WithProvisionerLimit will request the given number of provisioners.

type RenewFunc 

type RenewFunc func() (*tls.Certificate, error)

RenewFunc defines the type of the functions used to get a new tls certificate.

type RetryFunc 

type RetryFunc func(code int) bool

RetryFunc defines the method used to retry a request. If it returns true, the request will be retried once.

type StopReloader 

type StopReloader interface {
	Stop() error
	Reload() error
}

StopReloader is the interface that external commands can implement to stop the server and reload the configuration while running.

type Stopper 

type Stopper interface {
	Stop() error
}

Stopper is the interface that external commands can implement to stop the server.

type TLSOption 

type TLSOption func(ctx *TLSOptionCtx) error

TLSOption defines the type of a function that modifies a tls.Config.

func AddClientCA 

func AddClientCA(cert *x509.Certificate) TLSOption

AddClientCA adds to the tls.Config ClientCAs the given certificate. ClientCAs defines the set of root certificate authorities that servers use if required to verify a client certificate by the policy in ClientAuth.

func AddFederationToCAs 

func AddFederationToCAs() TLSOption

AddFederationToCAs does a federation request and adds the resulting certs to the tls.Config RootCAs and ClientCAs. Combines the functionality of AddFederationToRootCAs and AddFederationToClientCAs.

func AddFederationToClientCAs 

func AddFederationToClientCAs() TLSOption

AddFederationToClientCAs does a federation request and adds to the tls.Config ClientCAs all the certificates in the response. ClientCAs defines the set of root certificate authorities that servers use if required to verify a client certificate by the policy in ClientAuth.

func AddFederationToRootCAs 

func AddFederationToRootCAs() TLSOption

AddFederationToRootCAs does a federation request and adds to the tls.Config RootCAs all the certificates in the response. RootCAs defines the set of root certificate authorities that clients use when verifying server certificates.

func AddRootCA 

func AddRootCA(cert *x509.Certificate) TLSOption

AddRootCA adds to the tls.Config RootCAs the given certificate. RootCAs defines the set of root certificate authorities that clients use when verifying server certificates.

func AddRootsToCAs 

func AddRootsToCAs() TLSOption

AddRootsToCAs does a roots request and adds the resulting certs to the tls.Config RootCAs and ClientCAs. Combines the functionality of AddRootsToRootCAs and AddRootsToClientCAs.

func AddRootsToClientCAs 

func AddRootsToClientCAs() TLSOption

AddRootsToClientCAs does a roots request and adds to the tls.Config ClientCAs all the certificates in the response. ClientCAs defines the set of root certificate authorities that servers use if required to verify a client certificate by the policy in ClientAuth.

BootstrapServer method includes this option by default.

func AddRootsToRootCAs 

func AddRootsToRootCAs() TLSOption

AddRootsToRootCAs does a roots request and adds to the tls.Config RootCAs all the certificates in the response. RootCAs defines the set of root certificate authorities that clients use when verifying server certificates.

BootstrapServer and BootstrapClient methods include this option by default.

func RequireAndVerifyClientCert 

func RequireAndVerifyClientCert() TLSOption

RequireAndVerifyClientCert is a tls.Config option used on servers to enforce a valid TLS client certificate. This is the default option for mTLS servers.

func VerifyClientCertIfGiven 

func VerifyClientCertIfGiven() TLSOption

VerifyClientCertIfGiven is a tls.Config option used on on servers to validate a TLS client certificate if it is provided. It does not requires a certificate.

type TLSOptionCtx 

type TLSOptionCtx struct {
	Client      *Client
	Config      *tls.Config
	Sign        *api.SignResponse
	OnRenewFunc []TLSOption
	// contains filtered or unexported fields
}

TLSOptionCtx is the context modified on TLSOption methods.

type TLSRenewer 

type TLSRenewer struct {
	sync.RWMutex
	RenewCertificate RenewFunc
	// contains filtered or unexported fields
}

TLSRenewer automatically renews a tls certificate using a RenewFunc.

func NewTLSRenewer 

func NewTLSRenewer(cert *tls.Certificate, fn RenewFunc, opts ...tlsRenewerOptions) (*TLSRenewer, error)

NewTLSRenewer creates a TLSRenewer for the given cert. It will use the given RenewFunc to get a new certificate when required.

func (*TLSRenewer) GetCertificate 

func (r *TLSRenewer) GetCertificate(clientHello *tls.ClientHelloInfo) (*tls.Certificate, error)

GetCertificate returns the current server certificate.

This method is set in the tls.Config GetCertificate property.

func (*TLSRenewer) GetCertificateForCA 

func (r *TLSRenewer) GetCertificateForCA(clientHello *tls.ClientHelloInfo) (*tls.Certificate, error)

GetCertificateForCA returns the current server certificate. It can only be used if the renew function creates the new certificate and do not uses a TLS request. It's intended to be use by the certificate authority server.

This method is set in the tls.Config GetCertificate property.

func (*TLSRenewer) GetClientCertificate 

func (r *TLSRenewer) GetClientCertificate(*tls.CertificateRequestInfo) (*tls.Certificate, error)

GetClientCertificate returns the current client certificate.

This method is set in the tls.Config GetClientCertificate property.

func (*TLSRenewer) Run 

func (r *TLSRenewer) Run()

Run starts the certificate renewer for the given certificate.

func (*TLSRenewer) RunContext 

func (r *TLSRenewer) RunContext(ctx context.Context)

RunContext starts the certificate renewer for the given certificate.

func (*TLSRenewer) Stop 

func (r *TLSRenewer) Stop() bool

Stop prevents the renew timer from firing.

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