package auth import ( "context" "encoding/base64" "strings" grpc_auth "github.com/grpc-ecosystem/go-grpc-middleware/auth" "go.linka.cloud/grpc/errors" "go.linka.cloud/grpc/interceptors" "go.linka.cloud/grpc/interceptors/metadata" ) func BasicAuth(user, password string) string { return "basic " + base64.StdEncoding.EncodeToString([]byte(user+":"+password)) } type BasicValidator func(ctx context.Context, user, password string) (context.Context, error) func makeBasicAuthFunc(v BasicValidator) grpc_auth.AuthFunc { return func(ctx context.Context) (context.Context, error) { a, err := grpc_auth.AuthFromMD(ctx, "basic") if err != nil { return ctx, err } c, err := base64.StdEncoding.DecodeString(a) if err != nil { return ctx, err } cs := string(c) s := strings.IndexByte(cs, ':') if s < 0 { return ctx, errors.Unauthenticatedf("malformed basic auth") } return v(ctx, cs[:s], cs[s+1:]) } } func NewBasicAuthClientIntereptors(user, password string) interceptors.ClientInterceptors { return metadata.NewInterceptors("authorization", BasicAuth(user, password)) }