credentials

Documentation

Overview

Package credentials implements various credentials supported by gRPC library, which encapsulate all the state needed by a client to authenticate with a server and make various assertions, e.g., about the client's identity, role, or whether it is authorized to make a particular call.

Index

• Variables
• type AuthInfo
• type PerRPCCredentials
• type ProtocolInfo
• type TLSInfo
  • func (t TLSInfo) AuthType() string
• type TransportCredentials
  • func NewClientTLSFromCert(cp *x509.CertPool, serverNameOverride string) TransportCredentials
  • func NewClientTLSFromFile(certFile, serverNameOverride string) (TransportCredentials, error)
  • func NewServerTLSFromCert(cert *tls.Certificate) TransportCredentials
  • func NewServerTLSFromFile(certFile, keyFile string) (TransportCredentials, error)
  • func NewTLS(c *tls.Config) TransportCredentials

Variables

var (
	// ErrConnDispatched indicates that rawConn has been dispatched out of gRPC
	// and the caller should not close rawConn.
	ErrConnDispatched = errors.New("credentials: rawConn is dispatched out of gRPC")
)

Types

type AuthInfo

type AuthInfo interface {
	AuthType() string
}

AuthInfo defines the common interface for the auth information the users are interested in.

type PerRPCCredentials

type PerRPCCredentials interface {
	// GetRequestMetadata gets the current request metadata, refreshing
	// tokens if required. This should be called by the transport layer on
	// each request, and the data should be populated in headers or other
	// context. uri is the URI of the entry point for the request. When
	// supported by the underlying implementation, ctx can be used for
	// timeout and cancellation.
	// TODO(zhaoq): Define the set of the qualified keys instead of leaving
	// it as an arbitrary string.
	GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error)
	// RequireTransportSecurity indicates whether the credentials requires
	// transport security.
	RequireTransportSecurity() bool
}

PerRPCCredentials defines the common interface for the credentials which need to attach security information to every RPC (e.g., oauth2).

type ProtocolInfo

type ProtocolInfo struct {
	// ProtocolVersion is the gRPC wire protocol version.
	ProtocolVersion string
	// SecurityProtocol is the security protocol in use.
	SecurityProtocol string
	// SecurityVersion is the security protocol version.
	SecurityVersion string
	// ServerName is the user-configured server name.
	ServerName string
}

ProtocolInfo provides information regarding the gRPC wire protocol version, security protocol, security protocol version in use, server name, etc.

type TLSInfo

type TLSInfo struct {
	State tls.ConnectionState
}

TLSInfo contains the auth information for a TLS authenticated connection. It implements the AuthInfo interface.

func (TLSInfo) AuthType

func (t TLSInfo) AuthType() string

AuthType returns the type of TLSInfo as a string.

type TransportCredentials

type TransportCredentials interface {
	// ClientHandshake does the authentication handshake specified by the corresponding
	// authentication protocol on rawConn for clients. It returns the authenticated
	// connection and the corresponding auth information about the connection.
	// Implementations must use the provided context to implement timely cancellation.
	// gRPC will try to reconnect if the error returned is a temporary error
	// (io.EOF, context.DeadlineExceeded or err.Temporary() == true).
	// If the returned error is a wrapper error, implementations should make sure that
	// the error implements Temporary() to have the correct retry behaviors.
	ClientHandshake(context.Context, string, net.Conn) (net.Conn, AuthInfo, error)
	// ServerHandshake does the authentication handshake for servers. It returns
	// the authenticated connection and the corresponding auth information about
	// the connection.
	ServerHandshake(net.Conn) (net.Conn, AuthInfo, error)
	// Info provides the ProtocolInfo of this TransportCredentials.
	Info() ProtocolInfo
	// Clone makes a copy of this TransportCredentials.
	Clone() TransportCredentials
	// OverrideServerName overrides the server name used to verify the hostname on the returned certificates from the server.
	// gRPC internals also use it to override the virtual hosting name if it is set.
	// It must be called before dialing. Currently, this is only used by grpclb.
	OverrideServerName(string) error
}

TransportCredentials defines the common interface for all the live gRPC wire protocols and supported transport security protocols (e.g., TLS, SSL).

func NewClientTLSFromCert

func NewClientTLSFromCert(cp *x509.CertPool, serverNameOverride string) TransportCredentials

NewClientTLSFromCert constructs a TLS from the input certificate for client. serverNameOverride is for testing only. If set to a non empty string, it will override the virtual host name of authority (e.g. :authority header field) in requests.

func NewClientTLSFromFile

func NewClientTLSFromFile(certFile, serverNameOverride string) (TransportCredentials, error)

NewClientTLSFromFile constructs a TLS from the input certificate file for client. serverNameOverride is for testing only. If set to a non empty string, it will override the virtual host name of authority (e.g. :authority header field) in requests.

func NewServerTLSFromCert

func NewServerTLSFromCert(cert *tls.Certificate) TransportCredentials

NewServerTLSFromCert constructs a TLS from the input certificate for server.

func NewServerTLSFromFile

func NewServerTLSFromFile(certFile, keyFile string) (TransportCredentials, error)

NewServerTLSFromFile constructs a TLS from the input certificate file and key file for server.

func NewTLS

func NewTLS(c *tls.Config) TransportCredentials

NewTLS uses c to construct a TransportCredentials based on TLS.