middleware

Documentation

Index

• func BearerAuthFuncGRPC(auth authentication.Authentication) grpc_auth.AuthFunc
• func ExtractGRPCAuthSubject(ctx context.Context) (string, error)
• func InjectGRPCAuthSubject(ctx context.Context, sub string) context.Context
• type Extractor
• type Middleware
  • func BearerToken(authentication authentication.Authentication) Middleware

Functions

func BearerAuthFuncGRPC

func BearerAuthFuncGRPC(auth authentication.Authentication) grpc_auth.AuthFunc

BearerAuthFuncGRPC returns a new grpc_auth.AuthFunc to use with the gazebo-web authentication library.

The passed in context.Context will contain the gRPC metadata.MD object (for header-based authentication) and the peer.Peer information that can contain transport-based credentials (e.g. `credentials.AuthInfo`).

auth := authentication.New[...]()

srv := grpc.NewServer(
	grpc.StreamInterceptor(grpc_auth.StreamServerInterceptor(BearerAuthFuncGRPC(auth))),
	grpc.UnaryInterceptor(grpc_auth.UnaryServerInterceptor(BearerAuthFuncGRPC(auth))),
)

func ExtractGRPCAuthSubject

func ExtractGRPCAuthSubject(ctx context.Context) (string, error)

ExtractGRPCAuthSubject extracts the authentication subject (sub) claim from the context metadata. This claim is usually injected in a middleware such as BearerToken or BearerAuthFuncGRPC, if present.

From the RFC7519, section 4.1.2: https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.2

The "sub" (subject) claim identifies the principal that is the subject of the JWT. The claims in a JWT are normally
statements about the subject. The subject value MUST either be scoped to be locally unique in the context of the
issuer or be globally unique. The processing of this claim is generally application specific. The "sub" value is a
case-sensitive string containing a StringOrURI value.

This function only works with gRPC requests. It returns an error if the metadata couldn't be parsed or the subject is not present.

func InjectGRPCAuthSubject

func InjectGRPCAuthSubject(ctx context.Context, sub string) context.Context

InjectGRPCAuthSubject injects the authentication subject (sub) claim into the given context metadata. See ExtractGRPCAuthSubject for information on how to extract this value.

Types

type Extractor

type Extractor = request.Extractor

Extractor extracts a string value from an HTTP request. It's usually used to extract a header from an HTTP request, but can also be used for extracting a user and password from the body.

There are a few implementations already provided by the request package, for example: Bearer tokens: request.BearerExtractor

type Middleware

type Middleware func(http.Handler) http.Handler

Middleware is used to modify or augment the behavior of an HTTP request handler.

func BearerToken

func BearerToken(authentication authentication.Authentication) Middleware

BearerToken returns a Middleware for authenticating users using Bearer Tokens in JWT format.